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 Support list of dkim results in the dkim_status ACL condition, making
9 it more usable in the data ACL.
11 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
12 Previously This was only logged, on the assumption that errors would be
13 seen for a previous fflush(). However, a fuse filesystem has been
14 reported as showing this an error for the fclose(). The spool is now in
15 an uncertain state, and we have logged and responded acceptance. Change
16 this to respond with a temp-reject, wipe spoolfiles, and log the error
19 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
20 during a recipient verify callout, a QUIT command was attempted on the
21 now-closed callout channel, causing a paniclog entry.
23 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
24 a connection_reject log_selector, under tls_on_connect. Previously
25 with this combination, when the connect ACL rejected, a spurious
26 paniclog entry was made.
28 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
29 of loadbalancer-detection for resumption, in 4.96 - which tries to
30 use the EHLO response. SMTPS does not have one at the time it is starting
31 TLS. Change the default for the smtp transport host_name_extract option
32 to be a static string, for TLS-on-connect cases; meaning that resumption
33 will always be attempted (unless deliberately overriden).
35 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
36 chunk-separator specification. This was broken by hardening introduced
39 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
40 included the -H with the id; this also messed up exiqgrep.
42 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
43 was not properly skipped and empty elements would cause mis-parsing.
44 Tighten parsing of DKIM header records. Previously, all but lowercase
45 alpha chars would be ignored in potential tag names.
47 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
48 being searched. Previously we only had one for IPv4 addresses. Per the
49 documentation, the error results by default in a no-match result for the
50 list. It is logged if the unknown_in_list log_selector is used.
52 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
53 the routing operation. Previously it would silently stop routing the
56 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
57 info-request event close in time to a scheduled run timer could result in
58 the latter being missed, and no further queue scheduled runs being
59 initiated. This ouwld be more likely on high-load systems.
61 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
62 LF-only mode (as detected from the first header line). Previously we did
63 accept that in (normal) CRLF mode; this has been raised as a possible
64 attack scenario (under the name "smtp smuggling").
66 JH/13 Add an fdatasync call for the received message data file in spool, before
67 loggging reception and sending the SMTP ack. Previously we only flushed
68 the stdio buffer so there was still the possibility of a disk error.
70 JH/14 Bug 3061: Avoid a split log line when trying to rewrite a malformed
71 address. Previously, for the last address in a header line (commonly
72 there is only one) the terminating newline was part of the logged
75 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
76 header, when parsing for address-qualification. Previously one was only
77 written if there were rewrite rules.
79 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
82 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
83 the multiple-queue-runners facility for 4.97 broke this, giving only a
84 one-time run of the queue.
86 JH/18 Bug 3068: Log a warning for use of deprecated syntax in query-style
89 JH/19 Fix TLS startup. When the last expansion done before the initiation of a
90 TLS session resulted in a forced-fail, a misleading error was logged for
91 the expansino of tls_certificates. This would affect the common case of
92 that option being set (main-section options) but not having any variable
93 parts. It could also potentially affect tls_privatekeys. The underlyding
94 coding errors go back to 4.90 but were only exposed in 4.97.
96 JH/20 Bug 3047: A recent (somewhere between 10.34 and 10.42) version of the
97 pcre2 library starting allocating 20kB rather than 112 bytes per match
98 call, which broke the 2GB total limitation on Exim's memory management
99 when a user had over 104207 messages stored and the appendfile
100 maildir_quota_directory_regex option is in use. Release the allocated
101 memory every thosand files to avoid this.
102 The same issue arises with the ACL regex condition, which is applied
103 to every line of a received message.
105 JH/21 Bug 3059: Fix crash in smtp transport. When running for a message for
106 which all recipients had been handled (itself an issue) a null-pointer
107 deref was done on trying to write a retry record. Fix that by counting
108 the outstanding recipients before trying to transmit the message.
109 The situation arose for a second MX try within a transport run, when the
110 first had perm-rejected a recipient (the only one for the connection, in
111 the case seen) during pipelining, and then closed the TCP connection.
112 The transport classified that as an I/O error, leaving the message
113 outstanding but having marked up the recipient as dealt-with. It then
114 tried another MX because of the I/O error. Fix this by converting the
115 message-level status to ok if there was a close but all recipients were
116 dealt with. Thanks to Wolfgand Breyha for debug runs.
118 JH/22 The ESMTP_LIMITS facility (RFC 9422) is promoted from experimental status
119 and is now controlled by the build-time option DISABLE_ESMTP_LIMITS.
121 JH/23 Bug 3066: Avoid leaking lookup database credentials to log.
123 JH/24 Bug 3081: Fix a delivery process crash. When the router "errors_to"
124 option specified a fixed address, later rewriting on that address would
125 trip on the configuration data being readonly. Instead of modifying
126 in-place, copy data. Found and fixed by Peter Benie.
128 JH/25 Bug 3079: Fix crash in dbmnz. When a key was present for zero-length
129 data a null pointer was followed. Find and testcase by Sebastian Bugge.
131 JH/26 Fix encoding for an AUTH parameter on a MAIL FROM command. Previously
132 decimal 127 chars were not encoded, and lowercase hex was used for
133 encoded values. Outstanding since at least 1999.
135 JH/27 Fix crash in logging. When a message with a large number of recipients
136 had been received, and logging of recipients is enabled, the buffer used
137 for logging could reach limit. A read using a null pointer would then
138 be done, resulting in a crash of the receiving process before an SMTP
139 ACK for the message was returned to the sending system. Duplicate
140 messages were created as a result.
141 Find and debug help by Mateusz Krawczyk
143 JH/28 Bug 3086: Fix exinext for ipv6. Change the format of keys in the retry
144 DB, wrapping transport record bare-ip "host names" and ipv6
145 "host addresses" in square-brackets. This makes the parsing that
146 exinext does more reliable.
148 JH/29 Bug 3087: Fix SRS encode. A zero-length quoted element in the local-part
151 JH/30 Bug 3029: Avoid feeding Resent-From: to DMARC.
153 JH/31 Bug 3027: For -bh / -bhc tests change to using the compressed form of
154 ipv6 addresses for the sender. Previously the uncompressed form was used,
155 and if used in textual form this would result in behavior difference
158 JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
159 now classed as a protocol error and subject to smtp_max_synprot_errors.
165 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
166 SMTP connection" log lines.
168 JH/02 Option default value updates:
169 - queue_fast_ramp (main) true (was false)
170 - remote_max_parallel (main) 4 (was 2)
172 JH/03 Cache static regex pattern compilations, for use by ACLs.
174 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
175 Make the rewrite never match and keep the logging. Trust the
176 admin to be using verify=header-syntax (to actually reject the message).
178 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
179 (under Linux) we watch the dir containing the final file; previously
180 it would be the dir with the first symlink. We still do not monitor
183 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
184 dn_expand() is happy to pass them through.
186 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
187 the file with the proof had an unchanged name, the new proof(s) were
188 loaded on top of the old ones (and nover used; the old ones were stapled).
190 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
191 more than one message arrived in a single connection a reference from
192 the earlier message could be re-used. Often a sigsegv resulted.
193 These variables were introduced in Exim 4.87.
194 Debug help from Graeme Fowler.
196 JH/09 Fix ${filter } for conditions that modify $value. Previously the
197 modified version would be used in construction the result, and a memory
200 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
201 Find and fix by Jasen Betts.
203 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
204 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
205 the systemwide configuration to override the Exim config.
207 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
208 API changes in libopendmarc.
210 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
211 pid 1, in the normal "background daemon" mode, having to drop process-
212 group leadership also lost track of needing to create listener sockets.
214 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
215 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
217 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
218 a capture group which obtained no text (eg. "(abc)*" matching zero
219 occurrences) could cause a segfault if the corresponding $<n> was
222 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
223 included a close-brace character (eg. it itself used an expansion) an
226 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
227 starting TLS. Previously it was after, meaning that attackers on such
228 ports had to be screened using the host_reject_connection main config
229 option. The new sequence aligns better with the STARTTLS behaviour, and
230 permits defences against crypto-processing load attacks, even though it
231 is strictly an incompatible change.
232 Also, avoid sending any SMTP fail response for either the connect ACL
233 or host_reject_connection, for TLS-on-connect ports.
235 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
236 Previously this was not permitted, but it makes reasonable sense.
237 While there, restore a restriction on using it from a connect ACL; given
238 the change JH/16 it could only return false (and before 4.91 was not
241 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
242 was exactly sized compared to the log buffer, a crash occurred with the
243 misleading message "bad memory reference; pool not found".
244 Found and traced by Jasen Betts.
246 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
247 dns_again_means_nonexist included an element causing a DNS lookup which
248 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
249 included (though probably not limited to) a process crash from stack
250 memory limit, or from excessive open files. Replace this with a paniclog
251 whine (as this is likely a configuration error), and returning
254 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
255 this always failed, probably leading to the usual downgrade to in-clear
258 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
259 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
260 to not checking that list for these lookups.
262 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
265 JH/23 Fix crash in string expansions. Previously, if an empty variable was
266 immediately followed by an expansion operator, a null-indirection read
267 was done, killing the process.
269 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
270 include an SMTP response string which is longer than that supported
271 by the delivering transport. Alleviate by wrapping such lines before
274 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
275 chars (RFC limit). Previously a limit of 12 items was made, which with
276 a not-impossible References: in the message being bounced could still
277 be over-large and get stopped in the transport.
279 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
280 close. Previously a bare socket close was done.
282 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
285 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
286 message being considered for delivery was already being handled by
287 another process, and having an SMTP connection already open, the function
288 to close it tried to use an uninitialized variable. This would afftect
289 high-volume sites more, especially when running mailing-list-style loads.
290 Pollution of logs was the major effect, as the other process delivered
291 the message. Found and partly investigated by Graeme Fowler.
293 JH/29 Change format of the internal ID used for message identification. The old
294 version only supported 31 bits for a PID element; the new 64 (on systems
295 which can use Base-62 encoding, which is all currently supported ones
296 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
297 and must use Base-36). The new ID is 23 characters rather than 16, and is
298 visible in various places - notably logs, message headers, and spool file
299 names. Various of the ancillary utilities also have to know the format.
300 As well as the expanded PID portion, the sub-second part of the time
301 recorded in the ID is expanded to support finer precision. Theoretically
302 this permits a receive rate from a single comms channel of better than the
304 The major timestamp part of the ID is not changed; at 6 characters it is
305 usable until about year 3700.
306 Updating from previously releases is fully supported: old-format spool
307 files are still usable, and the utilities support both formats. New
308 message will use the new format. The one hints-DB file type which uses
309 message-IDs (the transport wait- DB) will be discarded if an old-format ID
310 is seen; new ones will be built with only new-format IDs.
311 Optionally, a utility can be used to convert spool files from old to new,
312 but this is only an efficiency measure not a requirement for operation
313 Downgrading from new to old requires running a provided utility, having
314 first stopped all operations. This will convert any spool files from new
315 back to old (losing time-precision and PID information) and remove any
316 wait- hints databases.
318 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
319 we treated them as item separators when parsing for a list item, but they
320 need to be protected by the doublequotes. While there, add handling for
323 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
324 Found and fixed by Jasen Betts. No testcase for this as my usual text
325 editor insists on emitting only valid UTF-8.
327 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
328 a null-indirection SIGSEGV for the receive process.
330 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
331 -bh use. Internal checking would spot this and take a panic.
333 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
334 In 4.96 this would expand to empty.
336 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
337 certificate. Find and fix by Andreas Metzler.
339 JH/36 Add ARC info to DMARC hostory records.
341 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
342 or fakedefer. Previously the sender could discover that the message
343 had in fact been accepted.
345 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
346 sequences. Previously the input was not noted as being tainted; notably
347 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
348 bad coding of authenticators.
350 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
351 and ${tr...}. Found and diagnosed by Heiko Schlichting.
353 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
354 could be triggered by externally-supplied input. Found by Trend Micro.
357 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
358 be triggered by externally-controlled input. Found by Trend Micro.
361 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
362 be triggered by externally-controlled input. Found by Trend Micro.
365 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
366 Make the rewrite never match and keep the logging. Trust the
367 admin to be using verify=header-syntax (to actually reject the message).
369 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
372 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
378 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
379 after reception to before a subsequent reception. This should
380 mean slightly faster delivery, and also confirmation of reception
383 JH/02 Move from using the pcre library to pcre2. The former is no longer
384 being developed or supported (by the original developer).
386 JH/03 Constification work in the filters module required a major version
387 bump for the local-scan API. Specifically, the "headers_charset"
388 global which is visible via the API is now const and may therefore
389 not be modified by local-scan code.
391 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
392 sendfile() didi not account for the way the ClamAV driver code called it.
394 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
395 time check was being done for every character; replace that with one
398 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
399 sent was prefixed with a length byte.
401 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
402 RFC 5321. Previously Dovecot (at least) would log errors during
405 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
406 in 4.61 without a reason logged. Binaries will be bigger, which might
407 matter on diskspace-constrained systems, but debug is easier.
409 JH/09 Fix macro-definition during "-be" expansion testing. The move to
410 write-protected store for macros had not accounted for these runtime
411 additions; fix by removing this protection for "-be" mode.
413 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
414 handing out large-numbered file descriptors, violating the usual Unix
415 assumption (and required by Posix) that the lowest possible number will be
416 allocated by the kernel when a new one is needed. In the daemon, and any
417 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
418 are not useable for FD_SET() [and hence select()] and overwrite the stack.
419 Assorted crashes happen.
421 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
422 main-section options or in a connect ACL, the value from the first ever
423 connection was never replaced for subsequent connections. Found by
426 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
427 though only once PCRE2 was introduced: the memory accounting used under
428 debug offset allocations by an int, giving a hard trap in early startup.
429 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
431 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
432 with underbars is given. The write-protection of configuration introduced
433 in 4.95 trapped when normalisation was applied to an option not needing
436 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
438 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
439 failing to close the certificates directory, every hour or any time it
442 JH/16 Debugging initiated by an ACL control now continues through into routing
443 and transport processes. Previously debugging stopped any time Exim
444 re-execs, or for processing a queued message.
446 JH/17 The "expand" debug selector now gives more detail, specifically on the
447 result of expansion operators and items.
449 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
450 bad comparison between the option value and the name of the file to
451 be included was done, and a mismatch was wrongly identified.
452 4.88 to 4.95 are affected.
454 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
456 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
457 supplied as the db file-pair basename. Previously, if a directory
458 path was given, for example via the autoreply "once" option, the DB
459 file.pag and file.dir files would be created in that directory's
462 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
463 "taint" log_selector. These were previously deprecated.
465 JH/22 Fix static address-list lookups to properly return the matched item.
466 Previously only the domain part was returned.
468 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
469 the call into OpenSSL to send a TLS Close was being repeated; this
470 resulted in the library waiting for the peer's Close. If that was never
471 sent we waited forever. Fix by tracking send calls.
473 JH/24 The ${run} expansion item now expands its command string elements after
474 splitting. Previously it was before; the new ordering makes handling
475 zero-length arguments simpler. The old ordering can be obtained by
476 appending a new option "preexpand", after a comma, to the "run".
478 JH/25 Taint-check exec arguments for transport-initiated external processes.
479 Previously, tainted values could be used. This affects "pipe", "lmtp" and
480 "queryprogram" transport, transport-filter, and ETRN commands.
481 The ${run} expansion is also affected: in "preexpand" mode no part of
482 the command line may be tainted, in default mode the executable name
485 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
486 the the facility was not passed across execs, and only the first message
487 passed over a connection could use BDAT; any further ones using DATA.
489 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
490 uses $sending_ip_address and an interface is specified.
491 Previously any use of the local address in the EHLO name disabled
492 PIPECONNECT, the common case being to use the rDNS of it.
494 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
495 resumption. Previously verify failed because no certificate status is
496 passed on the wire for the restarted session. Fix by using the recorded
497 ocsp status of the stored session for the new connection.
499 JH/29 TLS resumption: the key for session lookup in the client now includes
500 more info that a server could potentially use in configuring a TLS
501 session, avoiding oferring mismatching sessions to such a server.
502 Previously only the server IP was used.
504 JH/30 Fix string_copyn() for limit greater than actual string length.
505 Previously the copied amount was the limit, which could result in a
506 overlapping memcpy for newly allocated destination soon after a
507 source string shorter than the limit. Found/investigated by KM.
509 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
510 close; it may be needed for a subsequent connection. This caused a
511 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
513 JH/32 Fix CHUNKING for a second message on a connection when the first was
514 rejected. Previously we did not reset the chunking-offered state, and
515 erroneously rejected the BDAT command. Investigation help from
518 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
519 an empty address. Previously the expansion returned an error.
521 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
522 proxy. Previously these were misparsed, leading to paniclog entries.
528 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
529 related applications. Previously an "H" was used where available info
530 says that "M" should be, so change to match.
532 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
533 as arguments, so an implementation trying to copy these into a local
534 buffer was taking a taint-enforcement trap. Fix by using dynamically
535 created buffers. Similar fix for radius expansion condition.
537 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
538 reasonable, eg. to count headers. Fix by using dynamically created
539 buffers rather than a local. Do similar fixes for ACL actions "dcc",
540 "log_reject_target", "malware" and "spam"; the arguments are expanded
541 so could be handling tainted values.
543 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
544 broken the (no-op) support for this sendmail command. Restore it
545 to doing nothing, silently, and returning good status.
547 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
548 record path was given (or the default used) without a leading directory
549 path, an error occurred on trying to open it. Use the transport's working
552 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
553 transport. Previously it was the name on the DNS A-record; use instead
554 the head of the CNAME chain leading there (if there is one). This seems
555 to align better with RFC 6125.
557 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
558 smtp_accept_max_per_host allocated resources which were not released
559 when the limit was exceeded. This eventually crashed the daemon. Fix
560 by adding a release action in that path.
562 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
563 expanded; previously using tainted values was rejected. Fix by using
564 dynamically-created buffers.
566 JH/09 Relax restrictions on ACL verify condition needing access to message
567 headers. Previously they were only permitted in data and non-smtp ACLs;
568 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
569 not_blind, header_sender and header_names_ascii verification.
571 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
572 Previously a macro used one argument twice; when called with the
573 argument as an expression having side-effects, incorrect operation
574 resulted. Use an inlineable function.
576 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
577 held open for a verify callout. Previously this wan not accounted for
578 and a corrupt onward SMTP conversation resulted.
580 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
581 Previously they were embedded naively in the constructed address; when
582 needed, strip the quoting and quote the entire local_part.
583 Also make the inbound_srs expansion condition handle quoting.
585 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
586 excluded, not matching the documentation.
588 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
589 was given for the sqlite_dbfile a trap resulted.
591 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
592 "name" argument resulted in a trap. There is no reason to disallow such;
593 this was a coding error.
595 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
596 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
597 spent suspended, ignoring the POSIX definition. Previously we assumed
598 it did and a constant offset from real time could be used as a correction.
599 Change to using the same clock source for the start-of-message and the
600 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
601 exists, just to get a clock slightly more aligned to reality.
603 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
604 RFC says it is optional some validators care. The missing char was not
605 intended but triggered by a line-wrap alignment. Discovery and fix by
606 Guillaume Outters, hacked on by JH.
608 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
609 name being quoted was tainted a trap would be taken. Fix by using
610 dynamically created buffers. The routine could have been called by a
611 rewrite with the "h" flag, by using the "-F" command-line option, or
612 by using a "name=" option on a control=submission ACL modifier.
614 JH/19 SPF: change the Authentication-Results expansion component to give
615 smtp.helo when the sender domain is empty. Previously it gave
618 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
619 not in 127.0.0.0/8 to help in spotting list domains taken over by a
620 domain-parking registrar.
622 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
623 Previously when a whitespace character was specified it was not inserted
624 after removing the newline.
626 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
627 the domain part of the recipient address. This overrides any tls_sni
628 option set, which was previously used.
630 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
633 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
634 is_tainted() had an off-by-one error in the overenthusiastic direction.
635 Find and fix by Gavan. Although NetBSD is not a supported platform for
636 4.94 this bug could affect other platforms.
638 PP/01 Fix default prime selection to be consistent.
639 One path used ike23 still, instead of exim.dev.20160529.3; now both
640 execution flows will use the same DH primes (currently
641 exim.dev.20160529.3).
643 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
644 option in smtp transport, to match the documentation. Previously
645 verification was not being done in some cases where it should have been.
647 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
648 than one server was defined and depending on the platform memory layout
649 details, an internal consistency trap could be hit while walking the list
652 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
653 files. The value is used by the authresults expansion item. Previously
654 if this was used in a router or transport, a crash could result.
656 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
657 have a sufficient incidence of EINTR returns from select that an
658 interaction with other operations done by the main daemon loop exposed
659 a bug in the error-handling. This was benign apart from the log
662 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
663 for consistency with delivered "=>" and failed "**" lines. While we're
664 there, handle PRX and TFO.
666 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
667 applied. This resulted, if any header-line rewrite rules were configured,
668 in a panic-log triggerable by sending a message with a long address in
669 a header. Fix by increasing the arbitrary limit to larger than a single
670 (dewrapped) 5322 header line maximum size.
672 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
673 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
674 RFC 6648 which deprecates X- options in protocols as a general practice.
675 Changeover between the implementations is handled by the mechanisms
678 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
679 a remote which uses callout/hold. Previously the local was queued.
681 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
684 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
685 log line. The asterisk is now consistently appended to the remote IP
686 (and port, if given), and will also be provided on defer and fail log
687 lines. Previously it could be placed on the local IP if that was being
688 logged, and was only provided on delivery lines.
690 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
692 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
693 authenticator client_send option. Previously the next char, after a pair
694 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
695 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
696 documentation. There is still no way to get a leading ^ immediately
697 after a NUL (ie. for the password of a PLAIN method authenticator.
699 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
700 files. For bad sizes read, delete the record and whine to paniclog.
702 JH/38 When logging an AUTH failure, as server, do not include sensitive
703 information. Previously, the credentials would be included if given
704 as part of the AUTH command line and an ACL denied authentication.
706 JH/39 Bug 2691: fix $local_part_data. When the matching list element
707 referred to a file, bad data was returned. This likely also affected
710 JH/40 The gsasl authenticator now supports caching of the salted password
711 generated by the client-side implementation. This required the addition
712 of a new variable: $auth4.
714 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
715 left undeleted; the attempt to re-create it then failed - resulting in
716 the usual "SIGHUP tp have daemon reload configuration" to not work.
717 This affected any platform not supporting "abstract" Unix-domain
718 sockets (i.e. not Linux).
720 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
721 recipients" response to RCPT in a later response, with a 250. The
722 previous coding assumed this would not happen, and under PIPELINING
723 would result in both lost and duplicate recipients for a message.
725 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
726 Previously the weighting was incorrectly applied. Similar fix for socks
727 proxies. Found and fixed by Heiko Schlichting.
729 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
730 not handle sub-lists included using the +namedlist syntax. While
731 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
732 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
735 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
736 Previously the permanent pool was used, so the store could not be freed.
737 This meant a connection with many messages would use continually-growing
740 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
741 per-pool so as not to waste too much space. Previously a constant size
742 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
743 DOS attacks harder. The cost is wasted memory use in the larger blocks.
745 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
746 same space repeatedly, and a smaller process footprint.
748 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
749 for GnuTLS. Previously the name started "%s" which, while not a bug,
750 looked as if if might be one.
752 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
753 "continued connection") make the $proxy_* variables available. Previously
754 the information was not passed across the exec() call for subsequent
755 transport executions. This also mean that the log lines for the
756 messages can show the proxy information.
758 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
759 receive time. With modern systems the difference is significant.
760 The historical behaviour can be restored by disabling (a new) log_selector
761 "queue_time_exclusive".
763 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
764 content) were specifically tested for. Now, also cover expansions
765 resulting in ACL names and inline ACL content.
767 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
768 making it unusable in complex expressions.
770 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
771 fail with a taint-check on the spoolfile name, and leave the message
774 HS/01 Enforce absolute PID file path name.
776 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
778 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
780 PP/02 Bug 2643: Correct TLS DH constants.
781 A missing NUL termination in our code-generation tool had led to some
782 incorrect Diffie-Hellman constants in the Exim source.
783 Reported by kylon94, code-gen tool fix by Simon Arlott.
785 PP/03 Impose security length checks on various command-line options.
786 Fixes CVE-2020-SPRSS reported by Qualys.
788 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
789 better. Reported by Qualys.
791 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
792 providing a particularly obnoxious sender full name.
795 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
797 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
800 PP/08 Change default for recipients_max from unlimited to 50,000.
802 PP/09 Fix security issue with too many recipients on a message (to remove a
803 known security problem if someone does set recipients_max to unlimited,
804 or if local additions add to the recipient list).
805 Fixes CVE-2020-RCPTL reported by Qualys.
807 PP/10 Fix security issue in SMTP verb option parsing
808 Fixes CVE-2020-EXOPT reported by Qualys.
810 PP/11 Fix security issue in BDAT state confusion.
811 Ensure we reset known-good where we know we need to not be reading BDAT
812 data, as a general case fix, and move the places where we switch to BDAT
813 mode until after various protocol state checks.
814 Fixes CVE-2020-BDATA reported by Qualys.
816 HS/03 Die on "/../" in msglog file names
818 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
819 the Exim runtime user are allowed to create files.
821 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
824 QS/03 When reading the output from interpreted forward files we do not
825 pass the pipe between the parent and the interpreting process to
826 executed child processes (if any).
828 QS/04 Always die if requested from internal logging, even is logging is
831 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
832 the API; compilation noo longer completes with DMARC support included.
833 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
834 been reported on other platforms.
836 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
838 JH/56 Make the majority of info read from config files readonly, for defence-in-
839 depth against exploits. Suggestion by Qualys.
840 Not supported on Solaris 10.
842 JH/57 Fix control=fakreject for a custom message containing tainted data.
843 Previously this resulted in a log complaint, due to a re-expansion present
844 since fakereject was originally introduced.
846 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
847 modifier was given, a loop resulted.
849 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
850 pipelined SMTP command followed the BDAT LAST then it would be
851 incorrectly treated as part of the message body, causing a verification
854 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
855 require looser validation rules than those for 821-level addresses,
856 which only permit IP addresses.
862 JH/01 Avoid costly startup code when not strictly needed. This reduces time
863 for some exim process initialisations. It does mean that the logging
864 of TLS configuration problems is only done for the daemon startup.
866 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
868 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
869 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
872 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
873 DKIM signing is being done. Previously a transport_filter would always
874 disable CHUNKING, falling back to traditional DATA.
876 JH/05 Regard command-line recipients as tainted.
878 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
880 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
881 PAM library frees one of the arguments given to it, despite the
882 documentation. Therefore a plain malloc must be used.
884 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
885 on-stack buffers were used, resulting in a taint trap when DSN information
886 copied from a received message was written into the buffer.
888 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
889 the ordering of its ARC headers. This caused a crash.
891 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
892 a new record was being constructed with information from the peer, a trap
895 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
896 installation would get error messages from DMARC verify, when it hit the
897 nonexistent file indicated by the default. Distros wanting DMARC enabled
898 should both provide the file and set the option.
899 Also enforce no DMARC verification for command-line sourced messages.
901 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
902 could, depending on the platform, hang at the STARTTLS response.
904 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
905 message on a connection. Previously if one message had ARC headers and
906 the following one did not, a crash could result when adding an
907 Authentication-Results: header.
909 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
910 Exim main code and Exim-related utities. The introduction of taint
911 tracking also did many adjustments to string handling. Since then, eximon
912 frequently terminated with an assert failure.
914 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
915 check for 452 responses. This slightly helps the inefficieny of doing
916 a large alias-expansion into a recipient-limited target. The max_rcpt
917 transport option still applies (and at the current default, will override
918 the new feature). The check is done for either cause of synch, and forces
919 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
920 connection. The new facility is not tunable at this time.
922 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
923 library live data was being used, so the results became garbage. Make
924 copies while it is still usable.
926 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
927 on delivery deferred (==) and failed (**) lines (if a delivery was
928 attemtped). Previously it was only on completion (=>) lines.
930 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
931 for the expansion of the server_scram_iter and server_scram_salt options.
933 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
934 are now specifically given a NO_DATA response without hitting the system
935 resolver. The library goes on to do the now-standard TXT lookup.
936 Use of dnsdb lookups is not affected.
938 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
939 only retrieve the errormessage once. Previously two calls to dlerror()
940 were used, and the second one (for mainlog/paniclog) retrieved null
943 JH/20 Taint checking: disallow use of tainted data for
944 - the appendfile transport file and directory options
945 - the pipe transport command
946 - the autoreply transport file, log and once options
947 - file names used by the redirect router (including filter files)
949 - paths used by single-key lookups
950 Previously this was permitted.
952 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
953 adjusted the size of a major service buffer; this failed because the
954 buffer was in use at the time. Change to a compile-time increase in the
955 buffer size, when this authenticator is compiled into exim.
957 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
958 previous fast-mode was untenable in the face of glibs using mmap to
959 support larger malloc requests.
961 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
962 New values supported, if defined on system where compiled:
963 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
964 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
966 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
967 running a limited number of proceses in parallel, a benefit is gained. The
968 amount varies with the platform hardware and load. The use of the option
969 queue_run_in_order means we cannot do this, as ordering becomes
972 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
973 had introduced a string-copy (for ensuring NUL-termination) which was not
974 appropriate for that case, which can include embedded NUL bytes in the
975 block of data. Investigation showed the copy to actually be needless, the
976 data being length-specified.
978 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
979 done during a receiving connection, and both used TLS, global info was
980 used rather than per-connection info for tracking the state of data
981 queued for transmission. This could result in a connection hang.
983 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
984 Previously, when delivering serveral messages down a single connection
985 only the first would provide a SIZE. This was due to the size information
986 not being properly tracked.
988 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
989 TAI (at 37 seconds currently), pretend to be in UTC for time-related
990 expansion and logging. Previously, spurious values such as a future
991 minute could be seen.
993 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
994 it could crash from a null-deref. This could also affect the
995 ${addresses: } operator and ${readsock } item.
997 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
998 message following a mime one, the variable was not reset.
1000 JH/30 When an pipelined-connect fails at the first response, assume incorrect
1001 cached capability (perhaps the peer reneged?) and immediately retry in
1004 JH/31 Fix spurious detection of timeout while writing to transport filter.
1006 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
1007 an attempt to copy the string was made before checking it.
1009 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
1010 taint of the lookup key was maintained; we now regard the presence in the
1011 filesystem as sufficient validation.
1013 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
1014 argument is supplied.
1016 JH/35 The dsearch lookup now requires that the directory is an absolute path.
1017 Previously this was not checked, and nonempty relative paths made an
1018 access under Exim's current working directory.
1020 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
1021 Previously no event was raised.
1023 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
1024 parameter supplied by the sender MAIL FROM command. Previously it was
1025 ignored, and only the check_spool_space option value for the required
1028 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
1029 the size of the signing public-key. Previously it was instead giving
1030 the size of the signature hash.
1032 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
1033 the default. See the (new) dkim_verify_min_keysizes option.
1035 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
1036 and an ACL use a lookup for checking either the local_part or domain,
1037 stale data could be accessed. Ensure that variable references are
1038 dropped between messages.
1040 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1041 by the client was not checked as pointing within response data before
1042 being used. A malicious client could thus cause an out-of-bounds read and
1043 possibly gain authentication. Fix by adding the check.
1045 JH/42 Internationalisation: change the default for downconversion in the smtp
1046 transport to be "if needed". Previously it was "as previously set" for
1047 the message, which usually meant "if needed" for message-submission but
1048 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1049 even when the envelope addresses did not need it, resulting in forwarding
1050 failures to non-supporting MTAs. A downconvert in such cases will be
1051 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1052 transport. The change does mean that addresses needing conversion will
1053 be converted when previously a delivery failure would occur.
1055 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1056 response was received it would be used unchecked in a fail-DSN, violating
1057 standards on line-length limits. Truncate if needed.
1059 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1060 doesn't work. (Additionally add a new main config option to configure the
1067 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1068 side, to decode a TLS 1.3 packet capture.
1070 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1071 Previously the default library behaviour applied, sending two, each in
1072 its own TCP segment.
1074 JH/03 Debug output for ACL now gives the config file name and line number for
1077 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1079 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1081 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1082 buffer overrun for (non-chunking) other transports.
1084 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1085 TLS1.3, means that a server rejecting a client certificate is not visible
1086 to the client until the first read of encrypted data (typically the
1087 response to EHLO). Add detection for that case and treat it as a failed
1088 TLS connection attempt, so that the normal retry-in-clear can work (if
1089 suitably configured).
1091 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1092 and/or domain. Found and fixed by Jason Betts.
1094 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1095 configuration). If a CNAME target was not a wellformed name pattern, a
1098 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1099 the OS reports them interleaved with other addresses.
1101 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1102 used both for input and for a verify callout, both encrypted, SMTP
1103 responses being sent by the server could be lost. This resulted in
1104 dropped connections and sometimes bounces generated by a peer sending
1107 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1108 string. Previously it was possible to cause undefined behaviour in a
1109 library routine (usually a crash). Found by "zerons".
1111 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1114 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1115 API was removed, so update to use the newer ones.
1117 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1118 any timeout set, is taking a long time. Previously we would hang on to a
1119 rotated logfile "forever" if the input was arriving with long gaps
1120 (a previous attempt to fix addressed lack, for a long time, of initial
1123 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1124 shared (NFS) environment. The length of the tempfile name is now
1125 4 + 16 ("hdr.$message_exim_id") which might break on file
1126 systems which restrict the file name length to lower values.
1127 (It was "hdr.$pid".)
1129 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1130 shared (NFS) environment.
1132 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1133 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1136 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1137 on some platforms for bit 31.
1139 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1140 to changes apparently associated with TLS1.3 handling some of the APIs
1141 previously used were either nonfunctional or inappropriate. Strings
1142 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1143 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1144 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1145 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1146 and the use of specific cipher names in the encrypted= ACL condition.
1148 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1150 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1151 verification result was not updated unless hosts_require_ocsp applied.
1153 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1154 queue_list_requires_admin set to false, non-admin users were denied the
1157 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1158 directory-of-certs mode. Previously they were advertised despite the
1161 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1162 A single TCP connection by a client will now hold a TLS connection open
1163 for multiple message deliveries, by default. Previously the default was to
1166 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1167 default. If built with the facility, DANE will be used. The facility
1168 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1170 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1171 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1172 must be defined and you must still, unless you define DISABLE_TLS, manage
1173 the the include-dir and library-file requirements that go with that
1174 choice. Non-TLS builds are still supported.
1176 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1179 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1180 default. If the platform supports and has the facility enabled, it will
1181 be requested on all coneections.
1183 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1184 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1186 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1188 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1189 success-DSN messages. Previously the From: header was always the default
1190 one for these; the option was ignored.
1192 JH/28 Fix the timeout on smtp response to apply to the whole response.
1193 Previously it was reset for every read, so a teergrubing peer sending
1194 single bytes within the time limit could extend the connection for a
1195 long time. Credit to Qualsys Security Advisory Team for the discovery.
1197 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1198 delivery address, which leaked information of the results of local
1199 forwarding. Change to the original envelope recipient address, per
1202 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1203 requested. Previously not bounce was generated and a log entry of
1204 error ignored was made.
1206 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1208 JH/32 Introduce a general tainting mechanism for values read from the input
1209 channel, and values derived from them. Refuse to expand any tainted
1210 values, to catch one form of exploit.
1212 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1213 was unused and the unexpanded text used for the test. Found and
1214 fixed by Ruben Jenster.
1216 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1217 an attempt to use a TLS library read routine dereffed a nul pointer,
1220 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1221 them in our smtp response.
1223 JH/36 Have the general router option retry_use_local_part default to true when
1224 any of the restrictive preconditions are set (to anything). Previously it
1225 was only for check_local user. The change removes one item of manual
1226 configuration which is required for proper retries when a remote router
1227 handles a subset of addresses for a domain.
1229 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1230 link count into consideration.
1232 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1233 caused the extension of big_buffer, the following lines were ignored.
1235 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1236 accordance with RFC 2308. Previously there was no expiry, so a longlived
1237 receive process (eg. due to ACL delays) versus a short SOA value could
1240 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1242 JH/39 Promote DMARC support to mainline.
1244 JH/40 Bug 2452: Add a References: header to DSNs.
1246 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1247 parameters. The relevant library call is documented as "Deprecated: This
1248 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1249 3.6.0, DH parameters are negotiated following RFC7919."
1251 HS/06 Change the default of dnssec_request_domains to "*"
1253 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1254 carried on and emitted a BDAT command, even when PIPELINING was not
1257 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1258 buffer was used for the filename, resulting in a trap when tainted
1259 arguments (eg. $domain) were used.
1261 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1262 recommended to avoid a possible server-load attack. The feature can be
1263 re-enabled via the openssl_options main cofiguration option.
1265 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1266 for version 4.90 - adding a "more data" boolean to the arguments.
1267 Bumped the ABI version number also, this having been missed previously;
1268 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1269 respect of usage of smtp_printf() by either local_scan code or libraries
1270 accessed via the ${dlfunc } expansion item. Both will need coding
1271 adjustment for any calls to smtp_printf() to match the new function
1272 signature; a FALSE value for the new argument is always safe.
1274 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1275 the file-offset (which the Linux syscall does, and exim expects); this
1276 resulted in an indefinite loop.
1278 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1279 to do ARC verification. The Authentication-Results: header line added
1280 by the configuration then had no ARC item.
1282 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1283 an incorrect mode was used for reading the result, resulting in it being
1290 JH/01 Remove code calling the customisable local_scan function, unless a new
1291 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1293 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1294 non-signal-safe functions being used.
1296 JH/03 Bug 2269: When presented with a received message having a stupidly large
1297 number of DKIM-Signature headers, disable DKIM verification to avoid
1298 a resource-consumption attack. The limit is set at twenty.
1300 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1301 report of oldest_pass in ${authres } in consequence, and separate out
1302 some descriptions of reasons for verification fail.
1304 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1305 files in the spool were present and unlocked. A queue-runner could spot
1306 them, resulting in a duplicate delivery. Fix that by doing the unlock
1307 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1308 add more error-checking on spoolfile handling while that code is being
1311 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1312 No known attacks, no CVE, this is defensive hardening.
1314 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1315 a queue-runner could start a delivery while other operations were ongoing.
1316 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1317 Found and investigated by Tim Stewart. Fix by using the open message data
1318 file handle rather than opening another, and not locally closing it (which
1319 releases a lock) for that case, while creating the temporary .eml format
1320 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1322 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1323 $sender_verify_failure/$recipient_verify_failure to "random".
1325 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1328 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1329 Previously this would segfault.
1331 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1334 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1335 like zero, since the resolver should be doing this for us, But we need one
1336 as a CNAME but no MX presence gets the CNAME returned; we need to check
1337 that doesn't point to an MX to declare it "no MX returned" rather than
1338 "error, loop". A new main option is added so the older capability of
1339 following some limited number of chain links is maintained.
1341 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1343 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1344 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1345 now-deprecated earlier definitions used only specified the range up to TLS
1346 1.2 (in the older-version library docs).
1348 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1350 JH/15 Rework TLS client-side context management. Stop using a global, and
1351 explicitly pass a context around. This enables future use of TLS for
1352 connections to service-daemons (eg. malware scanning) while a client smtp
1353 connection is using TLS; with cutthrough connections this is quite likely.
1355 JH/16 Fix ARC verification to do AS checks in reverse order.
1357 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1359 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1360 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1361 Previously the "utf8" would be re-prepended for every additional message.
1363 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1364 Previously thery were accepted, resulting in issues when attempting to
1365 forward messages to a non-supporting MTA.
1367 PP/02 Let -n work with printing macros too, not just options.
1369 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1370 one parent address was copied, and bogus data was used at delivery-logging
1371 time. Either a crash (after delivery) or bogus log data could result.
1372 Discovery and analysis by Tim Stewart.
1374 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1375 Previously if the string ended mid-character, we did not insert the
1376 promised '?' replacement.
1378 PP/04 Documentation: current string operators work on bytes, not codepoints.
1380 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1381 should pack well giving a smaller memory footprint so better caching and
1382 therefore performance. Group the declarations where this can't be done so
1383 that the byte-sized flag variables are not interspersed among pointer
1384 variables, giving a better chance of good packing by the compiler.
1386 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1387 non-null, to avoid issues with sites running BATV. Previously reports were
1388 sent with an empty envelope sender so looked like bounces.
1390 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1391 The ignore_error flag wasn't being returned from the filter subprocess so
1392 was not set for later routers. Investigation and fix by Matthias Kurz.
1394 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1395 and a msg:complete for the whole, when a message is manually removed using
1396 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1398 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1399 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1400 hope that is portable enough.
1402 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1403 requiring a known-CA anchor certificate; make it now rely entirely on the
1404 TLSA as an anchor. Checking the name on the leaf cert against the name
1405 on the A-record for the host is still done for TA (but not for EE mode).
1407 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1408 included in delivery lines for non-proxied connections, when compiled with
1409 SUPPORT_SOCKS and running with proxy logging enabled.
1411 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1412 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1413 move the existing event to fire before the normal logging of message
1414 failure so that custom logging is bracketed by normal logging.
1416 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1417 msg:fail:internal event. Developement by Matthias Kurz.
1419 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1420 far too small for todays use of crypto signatures stored there. Go all
1421 the way to the max DNS message size of 64kB, even though this might be
1422 overmuch for IOT constrained device use.
1424 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1425 copy a string over itself. The library routine is documented as not
1426 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1428 JH/32 For main options check_spool_space and check_inode_space, where the
1429 platform supports 64b integers, support more than the previous 2^31 kB
1430 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1431 the previous G, M, k.
1433 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1434 $authenticated_fail_id variable on authentication failure. Previously
1437 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1438 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1439 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1440 GNUTLS_SEC_PARAM_MEDIUM.
1442 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1443 side. Previously we would continue as if no SNI had been received.
1445 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1446 "<" character, which should be a list-separator specification, we walked
1447 off past the nul-terimation.
1449 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1450 causes) even when the retry time is not yet met. Previously they were
1451 not, meaning that when (say) an account was over-quota and temp-rejecting,
1452 and multiple senders' messages were queued, only one sender would get
1453 notified on each configured delay_warning cycle.
1455 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1457 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1458 cipher-suites, an error can be left on the stack even for a succeeding
1459 accept; this results in impossible error messages when a later operation
1462 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1463 return error codes indicating retry. Under TLS1.3 this becomes required.
1465 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1466 it only wrote the new authenticators, resulting in a lack of tracking of
1467 peer changes of ESMTP extensions until the next cache flush.
1469 JH/41 Fix the loop reading a message header line to check for integer overflow,
1470 and more-often against header_maxsize. Previously a crafted message could
1471 induce a crash of the recive process; now the message is cleanly rejected.
1473 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1474 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1480 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1481 When redis_servers is set to a list of > 1 element, and the Redis servers
1482 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1483 case of MOVED into a DEFER case instead, thus moving the query onto the
1484 next server in the list. For a cluster of N elements, all N servers must
1485 be defined in redis_servers.
1487 GF/02 Catch and remove uninitialized value warning in exiqsumm
1488 Check for existence of @ARGV before looking at $ARGV[0]
1490 JH/01 Replace the store_release() internal interface with store_newblock(),
1491 which internalises the check required to safely use the old one, plus
1492 the allocate and data copy operations duplicated in both (!) of the
1493 extant use locations.
1495 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1496 modifier. This matches the restriction on the commandline.
1498 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1499 Previously only the last row was returned.
1501 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1502 we assumed that tags in the header were well-formed, and parsed the
1503 element content after inspecting only the first char of the tag.
1504 Assumptions at that stage could crash the receive process on malformed
1507 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1508 While running the DKIM ACL we operate on the Permanent memory pool so that
1509 variables created with "set" persist to the DATA ACL. Also (at any time)
1510 DNS lookups that fail create cache records using the Permanent pool. But
1511 expansions release any allocations made on the current pool - so a dnsdb
1512 lookup expansion done in the DKIM ACL releases the memory used for the
1513 DNS negative-cache, and bad things result. Solution is to switch to the
1514 Main pool for expansions.
1515 While we're in that code, add checks on the DNS cache during store_reset,
1516 active in the testsuite.
1517 Problem spotted, and debugging aided, by Wolfgang Breyha.
1519 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1520 When none of the hosts presented to a transport match an already-open
1521 connection, close it and proceed with the list. Previously we would
1522 queue the message. Spotted by Lena with Yahoo, probably involving
1525 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1526 Previously a spurious "250 OK id=" response was appended to the proper
1529 JH/08 The "support for" informational output now, which built with Content
1530 Scanning support, has a line for the malware scanner interfaces compiled
1531 in. Interface can be individually included or not at build time.
1533 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1534 by the template makefile "src/EDITME". The "STREAM" support for an older
1535 ClamAV interface method is removed.
1537 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1538 rows affected is given instead).
1540 JH/11 The runtime Berkeley DB library version is now additionally output by
1541 "exim -d -bV". Previously only the compile-time version was shown.
1543 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1544 SMTP connection. Previously, when one had more recipients than the
1545 first, an abortive onward connection was made. Move to full support for
1546 multiple onward connections in sequence, handling cutthrough connection
1547 for all multi-message initiating connections.
1549 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1550 routers. Previously, a multi-recipient message would fail to match the
1551 onward-connection opened for the first recipient, and cause its closure.
1553 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1554 a timeout on read on a GnuTLS initiating connection, resulting in the
1555 initiating connection being dropped. This mattered most when the callout
1556 was marked defer_ok. Fix to keep the two timeout-detection methods
1559 JH/15 Relax results from ACL control request to enable cutthrough, in
1560 unsupported situations, from error to silently (except under debug)
1561 ignoring. This covers use with PRDR, frozen messages, queue-only and
1564 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1566 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1567 metadata, resulting in a crash in free().
1569 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1570 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1571 Broken also in d185889f4, with init system revamp.
1573 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1574 Previously we abruptly closed the connection after reading a malware-
1575 found indication; now we go on to read the "scan ok" response line,
1578 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1579 ACL. Previously, a crash would result.
1581 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1582 macro text after a replacement (previously it was only once per line) and
1583 by skipping builtin macros when searching for an uppercase lead character.
1585 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1586 for the build is renamed.
1588 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1589 was allocated for every new TLS startup, meaning one per message. Fix
1590 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1592 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1593 reported the original. Fix to report (as far as possible) the ACL
1594 result replacing the original.
1596 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1597 OpenSSL. Certificate information is loaded for every new TLS startup,
1598 and the resources needed to be freed.
1600 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1602 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1605 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1606 DATA response info to the (existing) per-recipient response info for
1607 the "C=" log element. It can have useful tracking info from the
1608 destination system. Patch from Simon Arlott.
1610 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1611 length value. Previously this would segfault.
1613 HS/02 Support Avast multiline protoocol, this allows passing flags to
1614 newer versions of the scanner.
1616 JH/28 Ensure that variables possibly set during message acceptance are marked
1617 dead before release of memory in the daemon loop. This stops complaints
1618 about them when the debug_store option is enabled. Discovered specifically
1619 for sender_rate_period, but applies to a whole set of variables.
1620 Do the same for the queue-runner and queue-list loops, for variables set
1621 from spool message files. Do the same for the SMTP per-message loop, for
1622 certain variables indirectly set in ACL operations.
1624 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1625 as a multi-recipient message from a mailinglist manager). The coding had
1626 an arbitrary cutoff number of characters while checking for more input;
1627 enforced by writing a NUL into the buffer. This corrupted long / fast
1628 input. The problem was exposed more widely when more pipelineing of SMTP
1629 responses was introduced, and one Exim system was feeding another.
1630 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1631 receiving system, and refused recipients seen by the sending system
1632 (propating to people being dropped from mailing lists).
1633 Discovered and pinpointed by David Carter.
1635 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1636 replaced by the ${authresults } expansion.
1638 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1640 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1641 allows proper process termination in container environments.
1643 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1644 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1646 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1647 and "err_perm", deprecated since 4.83 when the RFC-defined words
1648 "temperror" and "permerror" were introduced.
1650 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1651 transport-filters or DKIM-signing. The restriction was lost in the
1652 consolidation of verify-callout and delivery SMTP handling.
1653 Extend the restriction to also cover ARC-signing.
1655 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1656 in defer=pass mode supply a 450 to the initiator. Previously the message
1659 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1660 tls_require_ciphers is used as before.
1662 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1663 "pass_unscanned". Only tmpfails from the scanner are written to
1664 the paniclog, as they may require admin intervention (permission
1665 denied, license issues). Other scanner errors (like decompression
1666 bombs) do not cause a paniclog entry.
1668 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1669 Previously it was possible to log spurious information in receive log
1672 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1673 triggered odd behaviour from Outlook Express clients.
1675 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1678 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1679 since the IETF WG has not yet settled on that versus the original
1680 "bare" representation.
1682 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1683 Previously the millisecond value corrupted the output.
1684 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1685 corrupted the output.
1691 JH/01 Rework error string handling in TLS interface so that the caller in
1692 more cases is responsible for logging. This permits library-sourced
1693 string to be attached to addresses during delivery, and collapses
1694 pairs of long lines into single ones.
1696 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1697 during configuration. Wildcards are allowed and expanded.
1699 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1700 This permits better logging.
1702 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1703 do not close it down and have the child transport start it up again on
1704 the passed-on TCP connection. Instead, proxy the child (and any
1705 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1706 affected: the continued delivery log lines do not have any DNSSEC, TLS
1707 Certificate or OCSP information. TLS cipher information is still logged.
1709 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1710 identical IP addresses on different listening ports. Will also affect
1713 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1714 add noisy ifdef guards to special-case this sillyness.
1715 Patch from Bernd Kuhls.
1717 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1718 than 255 are no longer allowed.
1720 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1721 Disable the session-cache too, which might reduce our load. Since we
1722 currrectly use a new context for every connection, both as server and
1723 client, there is no benefit for these.
1724 GnuTLS appears to not support tickets server-side by default (we don't
1725 call gnutls_session_ticket_enable_server()) but client side is enabled
1726 by default on recent versions (3.1.3 +) unless the PFS priority string
1729 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1730 <https://reproducible-builds.org/specs/source-date-epoch/>.
1732 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1733 the check for any unsuccessful recipients did not notice the limit, and
1734 erroneously found still-pending ones.
1736 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1737 MSG_MORE. Only in-clear (not on TLS connections).
1739 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1740 transport-filter is involved we can buffer the headers in memory for
1741 creating the signature, and read the spool data file once for the
1742 signature and again for transmission.
1744 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1745 4.77 as the kernel support then wasn't solid, having issues in 64bit
1746 mode. Now, it's been long enough. Add support for FreeBSD also.
1748 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1749 case where the routing stage had gathered several addresses to send to
1750 a host before calling the transport for the first, we previously failed
1751 to close down TLS in the old transport process before passing the TCP
1752 connection to the new process. The new one sent a STARTTLS command
1753 which naturally failed, giving a failed delivery and bloating the retry
1754 database. Investigation and fix prototype from Wolfgang Breyha.
1756 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1757 false-negatives in the check that the sender had not preempted a response
1758 or prompt from Exim (running as a server), due to that code's lack of
1759 awareness of the SMTP input buffering.
1761 PP/04 Add commandline_checks_require_admin option.
1762 Exim drops privileges sanely, various checks such as -be aren't a
1763 security problem, as long as you trust local users with access to their
1764 own account. When invoked by services which pass untrusted data to
1765 Exim, this might be an issue. Set this option in main configuration
1766 AND make fixes to the calling application, such as using `--` to stop
1769 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1770 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1771 responses to those, into a single TLS record each way (this usually means
1772 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1775 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1776 affects you only if you're dancing at the edge of the param size limits.
1777 If you are, and this message makes sense to you, then: raise the
1778 configured limit or use OpenSSL 1.1. Nothing we can do for older
1781 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1782 cmdline element to get the documented default one. Previously it was
1785 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1786 are unsuable for non-message-specific reasons - eg. connection timeout,
1787 banner-time rejection.
1789 JH/16 Fix logging of delivery remote port, when specified by router, under
1792 PP/06 Repair manualroute's ability to take options in any order, even if one
1793 is the name of a transport.
1796 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1798 JH/17 Change the list-building routines interface to use the expanding-string
1799 triplet model, for better allocation and copying behaviour.
1801 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1802 Previously it was constructed the first time a possibly-matching string
1803 was met in the configuration file input during startup; now it is done
1806 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1807 compatible one, to avoid the (poorly documented) possibility of a config
1808 file in the working directory redirecting the DB files, possibly correpting
1809 some existing file. CVE-2017-10140 assigned for BDB.
1811 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1812 cache-hot. Previously, although the result was properly cached, the
1813 initial verify call returned a defer.
1815 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1816 the main verify for receipient in uncached-mode.
1818 JH/22 Retire historical build files to an "unsupported" subdir. These are
1819 defined as "ones for which we have no current evidence of testing".
1821 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1822 if present. Previously it was ignored.
1824 JH/24 Start using specified-initialisers in C structure init coding. This is
1825 a C99 feature (it's 2017, so now considered safe).
1827 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1828 if was a fixed-sized field and bitmask ops via macros; it is now more
1831 PP/07 GitHub PR 56: Apply MariaDB build fix.
1832 Patch provided by Jaroslav Škarvada.
1834 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1835 during Coverity cleanups [4.87 JH/47]
1836 Diagnosis and fix provided by Michael Fischer v. Mollard.
1838 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1839 the right size to place the terminating semicolon on its own folded
1840 line, the header hash was calculated to an incorrect value thanks to
1841 the (relaxed) space the fold became.
1843 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1844 and confused the parent.
1846 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1847 which could crash as a result. This could lead to undeliverable messages.
1849 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1852 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1853 matters on fast-turnover and PID-randomising systems, which were getting
1854 out-of-order delivery.
1856 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1857 a possibly-overlapping copy. The symptom was that "Remote host closed
1858 connection in response to HELO" was logged instead of the actual 4xx
1861 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1862 Previously only that bufferd was discarded, resulting in SYMTP command
1865 JH/32 DKIM: when a message has multiple signatures matching an identity given
1866 in dkim_verify_signers, run the dkim acl once for each. Previously only
1867 one run was done. Bug 2189.
1869 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1870 "panic the current process" to "deliberately defer". The panic log is
1871 still written with the problem list name; the mail and reject logs now
1872 get a temp-reject line for the message that was being handled, saying
1873 something like "domains check lookup or other defer". The SMTP 451
1874 message is still "Temporary local problem".
1876 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1877 A crafted sequence of BDAT commands could result in in-use memory beeing
1878 freed. CVE-2017-16943.
1880 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1881 from SMTP input. Previously it was always done; now only done for DATA
1882 and not BDAT commands. CVE-2017-16944.
1884 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1885 to the message (such as an overlong header line). Previously this was
1886 not done and we did not exit BDAT mode. Followon from the previous item
1887 though a different problem.
1893 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1894 than -2003 did; needs libidn2 in addition to libidn.
1896 JH/02 The path option on a pipe transport is now expanded before use.
1898 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1899 Patch provided by "Björn", documentation fix added too.
1901 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1902 missing a wire-to-host endian conversion.
1904 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1905 close after a BDAT command line could be taken as a following command,
1906 giving a synch failure. Fix by only checking for synch immediately
1907 before acknowledging the chunk.
1909 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1910 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1911 macro. Patches provided by Josh Soref.
1913 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1914 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1915 by IANA as a service extension. However, John Klensin suggests that we
1918 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1919 the dkim code may be unix-mode line endings rather than smtp wire-format
1920 CRLF, so prepend a CR to any bare LF.
1922 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1923 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1925 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1926 the first were themselves being wrongly included in the feed into dkim
1927 processing; with most chunk sizes in use this resulted in an incorrect
1928 body hash calculated value.
1930 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1931 DKIM signature block, for verification. Although advised against by
1932 standards it is specifically not ruled illegal.
1934 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1936 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1937 missing a body hash (the bh= tag).
1939 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1940 It seems that HAProxy sends the Proxy Protocol information in clear and
1941 only then does a TLS startup, so do the same.
1943 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1944 TCP connections (such as for Spamd) unless the daemon successfully set
1945 Fast Open mode on its listening sockets. This fixes breakage seen on
1946 too-old kernels or those not configured for Fast Open, at the cost of
1947 requiring both directions being enabled for TFO, and TFO never being used
1948 by non-daemon-related Exim processes.
1950 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1951 endings, at least on the first header line. Try to canonify any that get
1952 past that check, despite the cost.
1954 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1955 now limited to an arbitrary five deep, while parsing addresses with the
1956 strip_excess_angle_brackets option enabled.
1958 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1959 instead leave the unprompted TLS handshake in socket buffer for the
1960 TLS library to consume.
1962 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1964 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1966 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1967 region in one operation, for speed, and this leaves assigned pointers
1968 dangling. Add checks run only under the testsuite which checks all
1969 variables at a store-reset and panics on a dangling pointer; add code
1970 explicitly nulling out all the variables discovered. Fixes one known
1971 bug: a transport crash, where a dangling pointer for $sending_ip_address
1972 originally assigned in a verify callout, is re-used.
1974 PP/06 Drop '.' from @INC in various Perl scripts.
1976 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1978 PP/08 Reduce a number of compilation warnings under clang; building with
1979 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1980 should be warning-free.
1982 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1984 HS/01 Fix portability problems introduced by PP/08 for platforms where
1985 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1987 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1988 chunk. This allows us to accept broken chunked messages. We need a more
1989 general solution here.
1991 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1992 already-broken messages in the queue.
1994 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1996 JH/19 Fix reference counting bug in routing-generated-address tracking.
2002 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
2003 supports it and a size is available (ie. the sending peer gave us one).
2005 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
2006 years of being deprecated). The replacements are the ACLs
2007 acl_smtp_mime and acl_not_smtp_mime.
2009 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
2010 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
2011 or even an in-clear connection were permitted. Now, if the host lookup
2012 was dnssec and dane was requested then the host is only used if the
2013 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
2014 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
2015 if one fails this test.
2016 This means that a poorly-configured remote DNS will make it incommunicado;
2017 but it protects against a DNS-interception attack on it.
2019 JH/04 Bug 1810: make continued-use of an open smtp transport connection
2020 non-noisy when a race steals the message being considered.
2022 JH/05 If main configuration option tls_certificate is unset, generate a
2023 self-signed certificate for inbound TLS connections.
2025 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
2026 in rewrites and routers.
2028 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
2029 and logged a warning sing 4.83; now they are a configuration file error.
2031 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
2032 (lacking @domain). Apply the same qualification processing as RCPT.
2034 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
2036 JH/10 Support ${sha256:} applied to a string (as well as the previous
2039 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2040 a cutthrough deliver is pending, as we always want to make a connection.
2041 This also avoids re-routing the message when later placing the cutthrough
2042 connection after a verify cache hit.
2043 Do not update it with the verify result either.
2045 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2046 when routing results in more than one destination address.
2048 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2049 signing (which inhibits the cutthrough capability). Previously only
2050 the presence of an option was tested; now an expansion evaluating as
2051 empty is permissible (obviously it should depend only on data available
2052 when the cutthrough connection is made).
2054 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2055 the relevant preceding SMTP command did not note the pipelining mode.
2057 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2058 Previously they were not counted.
2060 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2061 as one having no matching records. Previously we deferred the message
2062 that needed the lookup.
2064 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2065 distinguished as "(=".
2067 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2068 for missing MX records. Previously it only worked for missing A records.
2070 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2072 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2073 after the data-go-ahead and data-ack. Patch from Jason Betts.
2075 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2076 even for a "none" policy. Patch from Tony Meyer.
2078 JH/22 Fix continued use of a connection for further deliveries. If a port was
2079 specified by a router, it must also match for the delivery to be
2082 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2083 When one of the recipients of a message was unsuitable for the connection
2084 (has no matching addresses), we lost track of needing to mark it
2085 deferred. As a result mail would be lost.
2087 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2089 JH/25 Decoding ACL controls is now done using a binary search; the source code
2090 takes up less space and should be simpler to maintain. Merge the ACL
2091 condition decode tables also, with similar effect.
2093 JH/26 Fix problem with one_time used on a redirect router which returned the
2094 parent address unchanged. A retry would see the parent address marked as
2095 delivered, so not attempt the (identical) child. As a result mail would
2098 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2099 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2100 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2103 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2104 Main config options check_{log,spool}_{inodes,space} are now
2105 100 inodes, 10MB unless set otherwise in the configuration.
2107 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2108 Previously it only applied to the main-section connection policy
2111 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2113 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2114 by me. Added RFC7919 DH primes as an alternative.
2116 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2117 are not in the system include path.
2119 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2120 GnuTLS, when a session startup failed (eg because the client disconnected)
2121 Exim did stdio operations after fclose. This was exposed by a recent
2122 change which nulled out the file handle after the fclose.
2124 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2125 signed directly by the cert-signing cert, rather than an intermediate
2126 OCSP-signing cert. This is the model used by LetsEncrypt.
2128 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2130 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2131 an incoming connection.
2133 HS/02 Bug 1802: Do not half-close the connection after sending a request
2136 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2137 fallback to "prime256v1".
2139 JH/34 SECURITY: Use proper copy of DATA command in error message.
2140 Could leak key material. Remotely exploitable. CVE-2016-9963.
2146 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2147 and 3.4.4 - once the server is enabled to respond to an OCSP request
2148 it does even when not requested, resulting in a stapling non-aware
2149 client dropping the TLS connection.
2151 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2152 support variable-length bit vectors. No functional change.
2154 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2155 The I= interface field on outgoing lines is now after the H= remote
2156 host field, same as incoming lines. There is a separate
2157 outgoing_interface log selector which allows you to disable the
2160 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2161 If not running log_selector +smtp_connection the mainlog would be held
2162 open indefinitely after a "too many connections" event, including to a
2163 deleted file after a log rotate. Leave the per net connection logging
2164 leaving it open for efficiency as that will be quickly detected by the
2165 check on the next write.
2167 HS/01 Bug 1671: Fix post transport crash.
2168 Processing the wait-<transport> messages could crash the delivery
2169 process if the message IDs didn't exist for some reason. When
2170 using 'split_spool_directory=yes' the construction of the spool
2171 file name failed already, exposing the same netto behaviour.
2173 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2174 mime_regex ACL conditions.
2176 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2177 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2178 to HELO, local diagnostic string.
2180 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2181 log line to debug. Even when configured with a tls authenticator many
2182 client connections are expected to not authenticate in this way, so
2183 an authenticate fail is not an error.
2185 HS/02 Add the Exim version string to the process info. This way exiwhat
2186 gives some more detail about the running daemon.
2188 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2189 matter for fast-change records such as DNSBLs.
2191 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2192 retry record, even if constant. There may be multiple transports with
2193 different interface settings and the retry behaviour needs to be kept
2196 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2198 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2200 JH/10 Bug 840: fix log_defer_output option of pipe transport
2202 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2203 hosts_randomize. This matters a lot when combined with mua_wrapper.
2205 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2206 ${quote_pgsql:<string>} operator.
2208 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2210 JH/14 Change header file name for freeradius-client. Relevant if compiling
2211 with Radius support; from the Gentoo tree and checked under Fedora.
2213 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2215 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2216 option transport_filter, meaning no filtering.
2218 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2220 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2221 defaults to "*" (all hosts). The variable is now available when not built
2222 with TLS, default unset, mainly to enable keeping the testsuite sane.
2223 If a server certificate is not supplied (via tls_certificate) an error is
2224 logged, and clients will find TLS connections fail on startup. Presumably
2225 they will retry in-clear.
2226 Packagers of Exim are strongly encouraged to create a server certificate
2227 at installation time.
2229 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2230 with the $config_file variable.
2232 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2233 in transport context, after the attempt, and per-recipient. The latter type
2234 is per host attempted. The event data is the error message, and the errno
2235 information encodes the lookup type (A vs. MX) used for the (first) host,
2236 and the trailing two digits of the smtp 4xx response.
2238 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2239 to write to mainlog (or rejectlog, paniclog) in the window between file
2240 creation and permissions/ownership being changed. Particularly affects
2241 installations where exicyclog is run as root, rather than exim user;
2242 result is that the running daemon panics and dies.
2244 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2246 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2247 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2248 "pri" and "weight". Note that the previous implicit priority given by the
2249 list order is no longer honoured.
2251 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2252 for DKIM processing.
2254 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2255 by defining SUPPORT_SOCKS.
2257 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2258 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2259 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2260 variables are renamed to proxy_{local,external}_{address,port}.
2262 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2263 for a build by defining SUPPORT_I18N
2265 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2266 of the query string, and make ${quote_redis:} do that quoting.
2268 JH/29 Move Events support from Experimental to mainline, enabled by default
2269 and removable for a build by defining DISABLE_EVENT.
2271 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2273 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2274 cached by the daemon.
2276 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2277 by defining LOOKUP_REDIS. The libhiredis library is required.
2279 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2280 keys are given for lookup.
2282 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2283 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2284 only supported when built with TLS support. The PolarSSL SHA routines
2285 are still used when the TLS library is too old for convenient support.
2287 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2288 openssl_options), for security. OpenSSL forces this from version 1.1.0
2289 server-side so match that on older versions.
2291 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2292 allocation for $value could be released as the expansion processing
2293 concluded, but leaving the global pointer active for it.
2295 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2296 and to use the domains and local_parts ACL conditions.
2298 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2299 incorrectly not doubled on cutthrough transmission, hence seen as a
2300 body-termination at the receiving system - resulting in truncated mails.
2301 Commonly the sender saw a TCP-level error, and retransmitted the message
2302 via the normal store-and-forward channel. This could result in duplicates
2303 received - but deduplicating mailstores were liable to retain only the
2304 initial truncated version.
2306 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2308 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2310 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2311 we're in there, support oversigning also; bug 1309.
2313 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2315 HS/04 Add support for keep_environment and add_environment options.
2317 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2318 either intentional arithmetic overflow during PRNG, or testing config-
2321 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2322 delivery resulted in actual delivery. Cancel cutthrough before DATA
2325 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2326 rejects a recipient: pass the reject to the originator.
2328 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2329 Many were false-positives and ignorable, but it's worth fixing the
2332 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2333 for the new environment-manipulation done at startup. Move the routines
2334 from being local to tls.c to being global via the os.c file.
2336 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2337 an extract embedded as result-arg for a map, the first arg for extract
2338 is unavailable so we cannot tell if this is a numbered or keyed
2339 extraction. Accept either.
2345 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2348 JH/02 The smtp transport option "multi_domain" is now expanded.
2350 JH/03 The smtp transport now requests PRDR by default, if the server offers
2353 JH/04 Certificate name checking on server certificates, when exim is a client,
2354 is now done by default. The transport option tls_verify_cert_hostnames
2355 can be used to disable this per-host. The build option
2356 EXPERIMENTAL_CERTNAMES is withdrawn.
2358 JH/05 The value of the tls_verify_certificates smtp transport and main options
2359 default to the word "system" to access the system default CA bundle.
2360 For GnuTLS, only version 3.0.20 or later.
2362 JH/06 Verification of the server certificate for a TLS connection is now tried
2363 (but not required) by default. The verification status is now logged by
2364 default, for both outbound TLS and client-certificate supplying inbound
2367 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2370 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2371 Status Notification (bounce) messages are now MIME format per RFC 3464.
2372 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2373 under the control of the dsn_advertise_hosts option, and routers may
2374 have a dsn_lasthop option.
2376 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2377 default, modifiable by a malware= option. The list separator for
2378 the options can now be changed in the usual way. Bug 68.
2380 JH/10 The smtp_receive_timeout main option is now expanded before use.
2382 JH/11 The incoming_interface log option now also enables logging of the
2383 local interface on delivery outgoing connections.
2385 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2386 if the interface and destination host and port all match.
2388 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2391 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2392 Patch from Andrew Lewis.
2394 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2395 now supports optional time-restrictions, weighting, and priority
2396 modifiers per server. Patch originally by <rommer@active.by>.
2398 JH/16 The spamd_address main option now supports a mixed list of local
2399 and remote servers. Remote servers can be IPv6 addresses, and
2400 specify a port-range.
2402 JH/17 Bug 68: The spamd_address main option now supports an optional
2403 timeout value per server.
2405 JH/18 Bug 1581: Router and transport options headers_add/remove can
2406 now have the list separator specified.
2408 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2411 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2414 JH/21 Support for the A6 type of dns record is withdrawn.
2416 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2417 rather than the verbs used.
2419 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2420 from 255 to 1024 chars.
2422 JH/24 Verification callouts now attempt to use TLS by default.
2424 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2425 are generic router options now. The defaults didn't change.
2427 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2428 Original patch from Alexander Shikoff, worked over by JH.
2430 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2431 files if ZCAT_COMMAND is not executable.
2433 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2435 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2437 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2438 Normally benign, it bites when the pair was led to by a CNAME;
2439 modern usage is to not canonicalize the domain to a CNAME target
2440 (and we were inconsistent anyway for A-only vs AAAA+A).
2442 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2444 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2445 when evaluating $sender_host_dnssec.
2447 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2448 $sender_helo_dnssec variable.
2450 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2452 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2454 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2456 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2457 documented as working, but never had. Support all but $spam_report.
2459 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2460 added for tls authenticator.
2462 HS/03 Add perl_taintmode main config option
2468 TL/01 When running the test suite, the README says that variables such as
2469 no_msglog_check are global and can be placed anywhere in a specific
2470 test's script, however it was observed that placement needed to be near
2471 the beginning for it to behave that way. Changed the runtest perl
2472 script to read through the entire script once to detect and set these
2473 variables, reset to the beginning of the script, and then run through
2474 the script parsing/test process like normal.
2476 TL/02 The BSD's have an arc4random API. One of the functions to induce
2477 adding randomness was arc4random_stir(), but it has been removed in
2478 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2479 function when detected.
2481 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2482 cause callback expansion.
2484 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2485 syntax errors in an expansion can be treated as a string instead of
2486 logging or causing an error, due to the internal use of bool_lax
2487 instead of bool when processing it.
2489 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2490 server certificates when making smtp deliveries.
2492 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2494 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2496 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2498 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2499 Merged patch from Sebastian Wiedenroth.
2501 JH/05 Fix results-pipe from transport process. Several recipients, combined
2502 with certificate use, exposed issues where response data items split
2503 over buffer boundaries were not parsed properly. This eventually
2504 resulted in duplicates being sent. This issue only became common enough
2505 to notice due to the introduction of connection certificate information,
2506 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2508 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2509 size buffer was used, resulting in syntax errors when an expansion
2512 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2513 version 3.3.6 or later.
2515 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2516 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2517 both become "event_action", the variables become $event_name, $event_data
2518 and $event_defer_errno. There is a new variable $verify_mode, usable in
2519 routers, transports and related events. The tls:cert event is now also
2520 raised for inbound connections, if the main configuration event_action
2523 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2524 early OCSP support, but no stapling (appears to be less than 1.0.0).
2526 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2527 server certificate names available under the smtp transport option
2528 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2531 JH/10 Time-related extraction expansions from certificates now use the main
2532 option "timezone" setting for output formatting, and are consistent
2533 between OpenSSL and GnuTLS compilations. Bug 1541.
2535 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2536 encoded parameter in the incoming message. Bug 1558.
2538 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2539 include certificate info, eximon was claiming there were spoolfile
2542 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2544 JH/14 Log delivery-related information more consistently, using the sequence
2545 "H=<name> [<ip>]" wherever possible.
2547 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2548 are problematic for Debian distribution, omit them from the release
2551 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2553 JH/16 Fix string representation of time values on 64bit time_t architectures.
2556 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2557 output list separator was used.
2562 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2563 checkers that were complaining about end of non-void function with no
2566 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2567 This was a regression introduced in 4.83 by another bugfix.
2569 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2571 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2572 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2578 TF/01 Correctly close the server side of TLS when forking for delivery.
2580 When a message was received over SMTP with TLS, Exim failed to clear up
2581 the incoming connection properly after forking off the child process to
2582 deliver the message. In some situations the subsequent outgoing
2583 delivery connection happened to have the same fd number as the incoming
2584 connection previously had. Exim would try to use TLS and fail, logging
2585 a "Bad file descriptor" error.
2587 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2588 utilities have not been installed.
2590 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2591 temporary space as the ACL may create new global variables.
2593 TL/01 LDAP support uses per connection or global context settings, depending
2594 upon the detected version of the libraries at build time.
2596 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2597 to extract and use the src ip:port in logging and expansions as if it
2598 were a direct connection from the outside internet. PPv2 support was
2599 updated based on HAProxy spec change in May 2014.
2601 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2603 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2604 Properly escape header and check for NULL return.
2606 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2609 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2611 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2612 characters in header names, implemented as a verify condition.
2613 Contributed by Michael Fischer v. Mollard.
2615 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2616 results permerror and temperror. Previous values are deprecated but
2617 still accepted. In a future release, err_perm and err_temp will be
2618 completely removed, which will be a backward incompatibility if the
2619 ACL tests for either of these two old results. Patch contributed by
2620 user bes-internal on the mailing list.
2622 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2624 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2625 selectors, in both main and reject logs.
2627 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2630 JH/07 Add malware type "sock" for talking to simple daemon.
2632 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2634 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2635 routers/transports under cutthrough routing.
2637 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2638 numbers. Touch up "bool" conditional to keep the same definition.
2640 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2642 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2644 JH/12 Expand items in router/transport headers_add or headers_remove lists
2645 individually rather than the list as a whole. Bug 1452.
2647 Required for reasonable handling of multiple headers_ options when
2648 they may be empty; requires that headers_remove items with embedded
2649 colons must have them doubled (or the list-separator changed).
2651 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2652 view the policy declared in the DMARC record. Currently, $dmarc_status
2653 is a combined value of both the record presence and the result of the
2656 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2658 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2659 dnslookup router and the smtp transport (applying to the forward
2662 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2663 of ldap servers used for a specific lookup. Patch provided by Heiko
2666 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2667 New variable $lookup_dnssec_authenticated for observability.
2669 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2670 Patch submitted by Lars Timman.
2672 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2674 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2675 Requires trusted mode and valid format message id, aborts otherwise.
2676 Patch contributed by Heiko Schlichting.
2678 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2679 certextract with support for various fields. Bug 1358.
2681 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2682 is requested by default, modifiable by smtp transport option
2685 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2686 operate on certificate variables to give certificate fingerprints
2687 Also new ${sha256:cert_variable}.
2689 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2691 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2692 Christian Aistleitner.
2694 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2696 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2697 file. Patch from Wolfgang Breyha.
2699 JH/25 Expand the coverage of the delivery $host and $host_address to
2700 client authenticators run in verify callout. Bug 1476.
2702 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2703 align with daemon_smtp_ports. Bug 72.
2705 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2706 support and error reporting did not work properly.
2708 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2709 and is readable. Patch from Andrew Colin Kissa.
2711 TL/14 Enhance documentation of ${run expansion and how it parses the
2712 commandline after expansion, particularly in the case when an
2713 unquoted variable expansion results in an empty value.
2715 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2717 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2718 by renaming away from it. Addresses GH issue 15, reported by
2721 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2723 TL/15 SECURITY: prevent double expansion in math comparison functions
2724 (can expand unsanitized data). Not remotely exploitable.
2731 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2733 PP/02 Make -n do something, by making it not do something.
2734 When combined with -bP, the name of an option is not output.
2736 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2739 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2740 $sender_host_name and config options to manage this, and basic check
2743 PP/05 DSCP support for outbound connections and control modifier for inbound.
2745 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2746 (Only plugin which currently uses this is kerberos4, which nobody should
2747 be using, but we should make it available and other future plugins might
2748 conceivably use it, even though it would break NAT; stuff *should* be
2749 using channel bindings instead).
2751 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2752 name; added for Sendmail compatibility; requires admin caller.
2753 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2754 just ignore it); requires trusted caller.
2755 Also parse but ignore: -Ac -Am -X<logfile>
2758 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2760 TL/02 Add +smtp_confirmation as a default logging option.
2762 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2763 Patch by Magnus Holmgren from 2007-02-20.
2765 TL/04 Bugzilla 1281 - Spec typo.
2766 Bugzilla 1283 - Spec typo.
2767 Bugzilla 1290 - Spec grammar fixes.
2769 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2771 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2773 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2774 mailing list by by Dmitry Isaikin.
2776 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2778 JH/02 Support "G" suffix to numbers in ${if comparisons.
2780 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2782 NM/01 Bugzilla 1197 - Spec typo
2783 Bugzilla 1196 - Spec examples corrections
2785 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2787 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2788 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2791 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2792 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2794 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2795 "acl {{name}{arg}...}", and optional args on acl condition
2798 JH/05 Permit multiple router/transport headers_add/remove lines.
2800 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2802 JH/07 Avoid using a waiting database for a single-message-only transport.
2803 Performance patch from Paul Fisher. Bugzilla 1262.
2805 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2808 JH/09 Add $headers_added variable, with content from use of ACL modifier
2809 add_header (but not yet added to the message). Bugzilla 199.
2811 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2812 Pulled from Bugzilla 817 by Wolfgang Breyha.
2814 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2816 (nb: this is the same fix as in Exim 4.80.1)
2818 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2821 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2824 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2826 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2827 advertise SMTP AUTH mechanism to us, instead of a generic
2828 protocol violation error. Also, make Exim more robust to bad
2829 data from the Dovecot auth socket.
2831 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2833 When a queue runner is handling a message, Exim first routes the
2834 recipient addresses, during which it prunes them based on the retry
2835 hints database. After that it attempts to deliver the message to
2836 any remaining recipients. It then updates the hints database using
2839 So if a recipient address works intermittently, it can get repeatedly
2840 deferred at routing time. The retry hints record remains fresh so the
2841 address never reaches the final cutoff time.
2843 This is a fairly common occurrence when a user is bumping up against
2844 their storage quota. Exim had some logic in its local delivery code
2845 to deal with this. However it did not apply to per-recipient defers
2846 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2848 This change adds a proper retry rule check during routing so that the
2849 final cutoff time is checked against the message's age. We only do
2850 this check if there is an address retry record and there is not a
2851 domain retry record; this implies that previous attempts to handle
2852 the address had the retry_use_local_parts option turned on. We use
2853 this as an approximation for the destination being like a local
2854 delivery, as in LMTP.
2856 I suspect this new check makes the old local delivery cutoff check
2857 redundant, but I have not verified this so I left the code in place.
2859 TF/02 Correct gecos expansion when From: is a prefix of the username.
2861 Test 0254 submits a message to Exim with the header
2865 When I ran the test suite under the user fanf2, Exim expanded
2866 the header to contain my full name, whereas it should have added
2867 a Resent-Sender: header. It erroneously treats any prefix of the
2868 username as equal to the username.
2870 This change corrects that bug.
2872 GF/01 DCC debug and logging tidyup
2873 Error conditions log to paniclog rather than rejectlog.
2874 Debug lines prefixed by "DCC: " to remove any ambiguity.
2876 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2878 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2879 Bug spotted by Jeremy Harris; was flawed since initial commit.
2880 Would have resulted in OCSP responses post-SNI triggering an Exim
2881 NULL dereference and crash.
2883 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2885 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2886 Bug detection, analysis and fix by Samuel Thibault.
2887 Bugzilla 1331, Debian bug #698092.
2889 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2891 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2892 Server implementation by Todd Lyons, client by JH.
2893 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2894 config variable "prdr_enable" controls whether the server
2895 advertises the facility. If the client requests PRDR a new
2896 acl_data_smtp_prdr ACL is called once for each recipient, after
2897 the body content is received and before the acl_smtp_data ACL.
2898 The client is controlled by both of: a hosts_try_prdr option
2899 on the smtp transport, and the server advertisement.
2900 Default client logging of deliveries and rejections involving
2901 PRDR are flagged with the string "PRDR".
2903 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2904 fclose(). Diagnosis by Todd Lyons.
2906 PP/17 Update configure.default to handle IPv6 localhost better.
2907 Patch by Alain Williams (plus minor tweaks).
2910 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2911 This is now consistent with GnuTLS, and is now documented: the
2912 previous undocumented portable approach to treating the option as
2913 unset was to force an expansion failure. That still works, and
2914 an empty string is now equivalent.
2916 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2917 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2918 not performing validation itself.
2920 PP/20 Added force_command boolean option to pipe transport.
2921 Patch from Nick Koston, of cPanel Inc.
2923 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2926 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2928 PP/21 Fix eximon continuous updating with timestamped log-files.
2929 Broken in a format-string cleanup in 4.80, missed when I repaired the
2930 other false fix of the same issue.
2931 Report and fix from Heiko Schlichting.
2934 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2935 Report from Prashanth Katuri.
2937 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2938 It's SecureTransport, so affects any MacOS clients which use the
2939 system-integrated TLS libraries, including email clients.
2941 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2942 using a MIME ACL for non-SMTP local injection.
2943 Report and assistance in diagnosis by Warren Baker.
2945 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2947 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2949 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2950 last id that failed so it may be referenced in subsequent ACL's.
2952 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2955 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2956 ldap library initialization, allowing self-signed CA's to be
2957 used. Also properly sets require_cert option later in code by
2958 using NULL (global ldap config) instead of ldap handle (per
2959 session). Bug diagnosis and testing by alxgomz.
2961 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2962 the src/util/ subdirectory.
2964 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2965 renamed to Transport Post Delivery Action by Jeremy Harris, as
2968 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2969 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2970 redis_servers = needs to be configured which will be used by the redis
2971 lookup. Patch from Warren Baker, of The Packet Hub.
2973 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2975 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2976 hostname or reverse DNS when processing a host list. Used suggestions
2977 from multiple comments on this bug.
2979 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2981 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2982 Missed a few lines, added it to make the runtest require no keyboard
2985 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2986 contains upper case chars. Make router use caseful_local_part.
2988 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2989 support when GnuTLS has been built with p11-kit.
2995 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2997 This, or similar/improved, will also be change PP/11 of 4.82.
3003 PP/01 Handle short writes when writing local log-files.
3004 In practice, only affects FreeBSD (8 onwards).
3005 Bugzilla 1053, with thanks to Dmitry Isaikin.
3007 NM/01 Bugzilla 949 - Documentation tweak
3009 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
3012 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
3014 PP/02 Implemented gsasl authenticator.
3016 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
3018 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
3019 `pkg-config foo` for cflags/libs.
3021 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
3022 with rest of GSASL and with heimdal_gssapi.
3024 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
3025 `pkg-config foo` for cflags/libs for the TLS implementation.
3027 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
3028 properties get this fed in as external SSF. A number of robustness
3029 and debugging improvements to the cyrus_sasl authenticator.
3031 PP/08 cyrus_sasl server now expands the server_realm option.
3033 PP/09 Bugzilla 1214 - Log authentication information in reject log.
3034 Patch by Jeremy Harris.
3036 PP/10 Added dbmjz lookup type.
3038 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3040 PP/12 MAIL args handles TAB as well as SP, for better interop with
3041 non-compliant senders.
3042 Analysis and variant patch by Todd Lyons.
3044 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3045 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3046 Patch from Dirk Mueller <dmueller@suse.com>
3048 PP/13 tls_peerdn now print-escaped for spool files.
3049 Observed some $tls_peerdn in wild which contained \n, which resulted
3050 in spool file corruption.
3052 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3053 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3054 or write after TLS renegotiation, which otherwise led to messages
3057 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3058 as a tracking header (ie: a signed header comes before the signature).
3059 Patch from Wolfgang Breyha.
3061 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3062 comma-sep list; embedded commas doubled.
3064 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3066 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3068 Report and patch from Dmitry Banschikov.
3070 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3071 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3072 failures. We appear to now support TLS1.1+ with Exim.
3074 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3075 lets Exim select keys and certificates based upon TLS SNI from client.
3076 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3077 before an outbound SMTP session. New log_selector, +tls_sni.
3079 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3080 NULL dereference. Report and patch from Alun Jones.
3082 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3083 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3084 Not seeing resolver debug output on NetBSD, but suspect this is a
3085 resolver implementation change.
3087 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3088 Left warnings. Added "eximon gdb" invocation mode.
3090 PP/21 Defaulting "accept_8bitmime" to true, not false.
3092 PP/22 Added -bw for inetd wait mode support.
3094 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3095 locate the relevant includes and libraries. Made this the default.
3097 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3098 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3100 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3101 This may cause build issues on older platforms.
3103 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3104 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3105 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3106 Added SNI support via GnuTLS too.
3107 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3109 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3111 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3112 Applied second patch from Janne, implementing suggestion to default
3113 multiple-strings-in-record handling to match SPF spec.
3115 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3117 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3118 read-only, out of scope).
3119 Patch from Wolfgang Breyha, report from Stuart Northfield.
3121 PP/29 Fix three issues highlighted by clang analyser static analysis.
3122 Only crash-plausible issue would require the Cambridge-specific
3123 iplookup router and a misconfiguration.
3124 Report from Marcin Mirosław.
3126 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3128 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3129 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3130 As part of this, removing so much warning spew let me fix some minor
3131 real issues in debug logging.
3133 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3134 assignment on my part. Fixed.
3136 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3137 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3138 Janne Snabb (who went above and beyond: thank you).
3140 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3141 string otherwise requires a connection and a bunch more work and it's
3142 relatively easy to get wrong. Should also expose TLS library linkage
3145 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3146 64-bit ${eval} (JH/03).
3148 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3149 GNU libc to support some of the 64-bit stuff, should not lead to
3150 conflicts. Defined before os.h is pulled in, so if a given platform
3151 needs to override this, it can.
3153 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3154 protection layer was required, which is not implemented.
3155 Bugzilla 1254, patch from Wolfgang Breyha.
3157 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3158 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3159 tls_dhparam take prime identifiers. Also unbreak combination of
3160 OpenSSL+DH_params+TLSSNI.
3162 PP/39 Disable SSLv2 by default in OpenSSL support.
3168 PP/01 Solaris build fix for Oracle's LDAP libraries.
3169 Bugzilla 1109, patch from Stephen Usher.
3171 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3173 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3176 TF/02 Fix a couple more cases where we did not log the error message
3177 when unlink() failed. See also change 4.74-TF/03.
3179 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3180 lock up or crash if it happened to be inside a call to libc when it
3181 got a SIGUSR1 from exiwhat.
3183 The SIGUSR1 handler appends the current process status to the process
3184 log which is later printed by exiwhat. It used to use the general
3185 purpose logging code to do this, but several functions it calls are
3186 not safe for signals.
3188 The new output code in the SIGUSR1 handler is specific to the process
3189 log, and simple enough that it's easy to inspect for signal safety.
3190 Removing some special cases also simplifies the general logging code.
3191 Removing the spurious timestamps from the process log simplifies
3194 TF/04 Improved ratelimit ACL condition.
3196 The /noupdate option has been deprecated in favour of /readonly which
3197 has clearer semantics. The /leaky, /strict, and /readonly update modes
3198 are mutually exclusive. The update mode is no longer included in the
3199 database key; it just determines when the database is updated. (This
3200 means that when you upgrade Exim will forget old rate measurements.)
3202 Exim now checks that the per_* options are used with an update mode that
3203 makes sense for the current ACL. For example, when Exim is processing a
3204 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3205 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3206 must specify per_mail/readonly. If you omit the update mode it defaults to
3207 /leaky where that makes sense (as before) or /readonly where required.
3209 The /noupdate option is now undocumented but still supported for
3210 backwards compatibility. It is equivalent to /readonly except that in
3211 ACLs where /readonly is required you may specify /leaky/noupdate or
3212 /strict/noupdate which are treated the same as /readonly.
3214 A useful new feature is the /count= option. This is a generalization
3215 of the per_byte option, so that you can measure the throughput of other
3216 aggregate values. For example, the per_byte option is now equivalent
3217 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3219 The per_rcpt option has been generalized using the /count= mechanism
3220 (though it's more complicated than the per_byte equivalence). When it is
3221 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3222 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3223 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3224 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3225 Note that using per_rcpt with a non-readonly update mode in more than
3226 one ACL will cause the recipients to be double-counted. (The per_mail
3227 and per_byte options don't have this problem.)
3229 The handling of very low rates has changed slightly. If the computed rate
3230 is less than the event's count (usually one) then this event is the first
3231 after a long gap. In this case the rate is set to the same as this event's
3232 count, so that the first message of a spam run is counted properly.
3234 The major new feature is a mechanism for counting the rate of unique
3235 events. The new per_addr option counts the number of different
3236 recipients that someone has sent messages to in the last time period. It
3237 behaves like per_rcpt if all the recipient addresses are different, but
3238 duplicate recipient addresses do not increase the measured rate. Like
3239 the /count= option this is a general mechanism, so the per_addr option
3240 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3241 example, measure the rate that a client uses different sender addresses
3242 with the options per_mail/unique=$sender_address. There are further
3243 details in the main documentation.
3245 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3247 TF/06 Removed a few PCRE remnants.
3249 TF/07 Automatically extract Exim's version number from tags in the git
3250 repository when doing development or release builds.
3252 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3253 Bugzilla 879. Patch from Paul Fisher.
3255 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3256 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3259 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3261 PP/05 Variable $av_failed, true if the AV scanner deferred.
3262 Bugzilla 1078. Patch from John Horne.
3264 PP/06 Stop make process more reliably on build failure.
3265 Bugzilla 1087. Patch from Heiko Schlittermann.
3267 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3268 Bugzilla 1089. Patch from Heiko Schlittermann.
3270 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3271 Bugzilla 1131. Patch from Holger Weiß.
3273 PP/09 Handle IPv6 addresses with SPF.
3274 Bugzilla 860. Patch from Wolfgang Breyha.
3276 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3278 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3281 PP/11 match_* no longer expand right-hand-side by default.
3282 New compile-time build option, EXPAND_LISTMATCH_RHS.
3283 New expansion conditions, "inlist", "inlisti".
3285 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3287 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3289 PP/14 fix log_write() format string regression from TF/03.
3290 Bugzilla 1152. Patch from Dmitry Isaikin.
3296 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3298 PP/02 Harmonised TLS library version reporting; only show if debugging.
3299 Layout now matches that introduced for other libraries in 4.74 PP/03.
3301 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3303 PP/04 New "dns_use_edns0" global option.
3305 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3308 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3309 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3311 TK/01 Updated PolarSSL code to 0.14.2.
3312 Bugzilla 1097. Patch from Andreas Metzler.
3314 PP/07 Catch divide-by-zero in ${eval:...}.
3315 Fixes bugzilla 1102.
3317 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3320 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3321 format-string attack -- SECURITY: remote arbitrary code execution.
3323 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3324 time unintentionally subject to list matching rules, letting the header
3325 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3326 arbitrary string expansion). This allowed for information disclosure.
3328 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3329 INT_MIN/-1 -- value coerced to INT_MAX.
3335 NM/01 Workaround for PCRE version dependency in version reporting
3338 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3339 This fixes portability to compilers other than gcc, notably
3340 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3342 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3343 makefiles for portability to HP-UX and POSIX correctness.
3345 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3346 Also via indented variable definition in the Makefile.
3347 (Debugging by Oliver Heesakkers).
3349 PP/02 Restore caching of spamd results with expanded spamd_address.
3350 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3352 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3353 Improves build reliability. Fix from: Frank Elsner
3355 NM/02 Fix wide character breakage in the rfc2047 coding
3356 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3358 NM/03 Allow underscore in dnslist lookups
3359 Fixes bug 1026. Patch from Graeme Fowler
3361 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3362 Code patches from Adam Ciarcinski of NetBSD.
3364 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3367 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3368 is logged, to avoid truncation. Patch from John Horne.
3370 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3371 Patch from Jakob Hirsch.
3373 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3374 SQL string expansion failure details.
3375 Patch from Andrey Oktyabrski.
3377 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3378 Patch from Simon Arlott.
3380 PP/09 New lookups functionality failed to compile on old gcc which rejects
3381 extern declarations in function scope.
3382 Patch from Oliver Fleischmann
3384 PP/10 Use sig_atomic_t for flags set from signal handlers.
3385 Check getgroups() return and improve debugging.
3386 Fixed developed for diagnosis in bug 927 (which turned out to be
3389 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3390 Patch from Mark Zealey.
3392 PP/12 Bugzilla 1056: Improved spamd server selection.
3393 Patch from Mark Zealey.
3395 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3396 Based on patch from Heiko Schlittermann.
3398 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3399 Patch from Uwe Doering, sign-off by Michael Haardt.
3401 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3402 variable declaration deep within a block. Bug and patch from
3405 PP/15 lookups-Makefile IRIX compatibility coercion.
3407 PP/16 Make DISABLE_DKIM build knob functional.
3409 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3410 Patch by Simon Arlott
3412 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3413 variable argument macros. Our copy now differs from upstream.
3419 TF/01 Failure to get a lock on a hints database can have serious
3420 consequences so log it to the panic log.
3422 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3423 controlled using the smtp_confirmation log selector.
3425 TF/03 Include the error message when we fail to unlink a spool file.
3427 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3428 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3429 for maintaining out-of-tree patches for some time.
3431 PP/01 Bugzilla 139: Documentation and portability issues.
3432 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3433 Handle per-OS dynamic-module compilation flags.
3435 PP/02 Let /dev/null have normal permissions.
3436 The 4.73 fixes were a little too stringent and complained about the
3437 permissions on /dev/null. Exempt it from some checks.
3438 Reported by Andreas M. Kirchwitz.
3440 PP/03 Report version information for many libraries, including
3441 Exim version information for dynamically loaded libraries. Created
3442 version.h, now support a version extension string for distributors
3443 who patch heavily. Dynamic module ABI change.
3445 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3446 privilege escalation vulnerability whereby the Exim run-time user
3447 can cause root to append content of the attacker's choosing to
3450 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3453 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3454 If dropping privileges for untrusted macros, we disabled normal logging
3455 on the basis that it would fail; for the Exim run-time user, this is not
3456 the case, and it resulted in successful deliveries going unlogged.
3457 Fixed. Reported by Andreas Metzler.
3463 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3464 only prepend for the Resent-* case. Fixes regression introduced in
3465 Exim 4.70 by NM/22 for Bugzilla 607.
3467 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3468 increasing numbers of administrators be bitten by this.
3470 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3472 PP/03 Bugzilla 994: added openssl_options main configuration option.
3474 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3476 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3478 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3480 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3481 without a peer certificate, leading to a segfault because of an
3482 assumption that peers always have certificates. Be a little more
3483 paranoid. Problem reported by Martin Tscholak.
3485 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3486 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3487 NB: ClamAV planning to remove STREAM in "middle of 2010".
3488 CL also introduces -bmalware, various -d+acl logging additions and
3489 more caution in buffer sizes.
3491 PP/09 Implemented reverse_ip expansion operator.
3493 PP/10 Bugzilla 937: provide a "debug" ACL control.
3495 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3497 PP/12 Bugzilla 973: Implement --version.
3499 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3501 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3503 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3505 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3506 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3507 ignore trailing whitespace.
3509 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3511 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3514 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3515 Notification from Dr Andrew Aitchison.
3517 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3518 ExtendedDetectionInfo response format.
3519 Notification from John Horne.
3521 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3524 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3525 XSL and documented dependency on system catalogs, with examples of how
3528 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3531 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3532 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3533 configuration file which is writeable by the Exim user or group.
3535 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3536 of configuration files to cover files specified with the -C option if
3537 they are going to be used with root privileges, not just the default
3540 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3541 option (effectively making it always true).
3543 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3544 files to be used while preserving root privileges.
3546 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3547 that rogue child processes cannot use them.
3549 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3550 run-time user, instead of root.
3552 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3553 Exim run-time user without dropping privileges.
3555 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3556 result string, instead of calling string_vformat() twice with the same
3559 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3560 for other users. Others should always drop root privileges if they use
3561 -C on the command line, even for a whitelisted configure file.
3563 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3565 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3571 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3572 $data_path, and $header_path variables; fixed documentation bugs and
3575 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3576 exipick to access non-standard spools, including the "frozen" queue
3579 NM/01 Bugzilla 965: Support mysql stored procedures.
3580 Patch from Alain Williams
3582 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3584 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3585 Patch from Andreas Metzler
3587 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3588 Patch from Kirill Miazine
3590 NM/05 Bugzilla 671: Added umask to procmail example.
3592 JJ/03 installed exipick 20100323.0, fixing doc bug
3594 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3595 directory. Notification and patch from Dan Rosenberg.
3597 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3599 TK/02 Improve log output when DKIM signing operation fails.
3601 MH/01 Treat the transport option dkim_domain as a colon separated
3602 list, not as a single string, and sign the message with each element,
3603 omitting multiple occurences of the same signer.
3605 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3606 Bugzilla 985, 986. Patch by Simon Arlott
3608 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3609 Patch by Simon Arlott
3611 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3612 MBX locking. Notification from Dan Rosenberg.
3618 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3620 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3622 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3624 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3626 NM/04 Bugzilla 915: Flag broken perl installation during build.
3632 TK/01 Added patch by Johannes Berg that expands the main option
3633 "spamd_address" if it starts with a dollar sign.
3635 TK/02 Write list of recipients to X-Envelope-Sender header when building
3636 the mbox-format spool file for content scanning (suggested by Jakob
3639 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3640 (http://www.dcc-servers.net/) support via dccifd. Activated by
3641 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3643 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3644 by Mark Daniel Reidel <mr@df.eu>.
3646 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3647 When building exim an external PCRE library is now needed -
3648 PCRE is a system library on the majority of modern systems.
3649 See entry on PCRE_LIBS in EDITME file.
3651 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3652 conversation. Added nologin parameter to request.
3653 Patch contributed by Kirill Miazine.
3655 TF/01 Do not log submission mode rewrites if they do not change the address.
3657 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3659 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3660 log files in place. Contributed by Roberto Lima.
3662 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3664 TF/03 Bugzilla 615: When checking the local_parts router precondition
3665 after a local_part_suffix or local_part_prefix option, Exim now
3666 does not use the address's named list lookup cache, since this
3667 contains cached lookups for the whole local part.
3669 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3670 Robert Millan. Documentation is in experimental-spec.txt.
3672 TF/04 Bugzilla 668: Fix parallel build (make -j).
3674 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3676 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3677 Patch provided by Jan Srzednicki.
3679 TF/05 Leading white space used to be stripped from $spam_report which
3680 wrecked the formatting. Now it is preserved.
3682 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3683 that they are available at delivery time.
3685 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3687 TF/08 TLS error reporting now respects the incoming_interface and
3688 incoming_port log selectors.
3690 TF/09 Produce a more useful error message if an SMTP transport's hosts
3691 setting expands to an empty string.
3693 NM/06 Bugzilla 744: EXPN did not work under TLS.
3694 Patch provided by Phil Pennock.
3696 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3697 Patch provided by Richard Godbee.
3699 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3700 acl_smtp_notquit, added index entry.
3702 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3703 Patch provided by Eugene Bujak.
3705 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3706 accept(). Patch provided by Maxim Dounin.
3708 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3709 Patch provided by Phil Pennock.
3711 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3713 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3714 Patch provided by Brad "anomie" Jorsch.
3716 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3717 Patch provided by Dean Brooks.
3719 TK/05 Add native DKIM support (does not depend on external libraries).
3721 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3722 Patch provided by Graeme Fowler.
3724 NM/16 Bugzilla 851: Documentation example syntax fix.
3726 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3728 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3731 NM/19 Bugzilla 745: TLS version reporting.
3732 Patch provided by Phil Pennock.
3734 NM/20 Bugzilla 167: bool: condition support.
3735 Patch provided by Phil Pennock.
3737 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3738 clients. Patch provided by Phil Pennock.
3740 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3741 Patch provided by Brad "anomie" Jorsch.
3743 NM/23 Bugzilla 687: Fix misparses in eximstats.
3744 Patch provided by Heiko Schlittermann.
3746 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3747 Patch provided by Heiko Schlittermann.
3749 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3750 plus update to original patch.
3752 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3754 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3755 Patch provided by David Brownlee.
3757 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3759 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3761 NM/30 Bugzilla 888: TLS documentation bugfixes.
3763 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3765 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3766 Unlike the original bugzilla I have changed all shell scripts in src tree.
3768 NM/33 Bugzilla 898: Transport filter timeout fix.
3769 Patch by Todd Rinaldo.
3771 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3772 Patch by Serge Demonchaux.
3774 NM/35 Bugzilla 39: Base64 decode bug fixes.
3775 Patch by Jakob Hirsch.
3777 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3779 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3781 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3783 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3789 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3790 ALT-N's libdkim that I have put here:
3791 http://duncanthrax.net/exim-experimental/
3793 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3794 were called 'true' and it seems that C99 defines that as a reserved
3795 keyword to be used with 'bool' variable types. That means you could
3796 not include C99-style headers which use bools without triggering
3797 build errors in sieve.c.
3799 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3800 as mailq or other aliases. Changed the --help handling significantly
3801 to do whats expected. exim_usage() emits usage/help information.
3803 SC/01 Added the -bylocaldomain option to eximstats.
3805 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3807 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3809 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3815 PH/01 Another patch from the Sieve maintainer.
3817 PH/02 When an IPv6 address is converted to a string for single-key lookup
3818 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3819 dots are used instead of colons so that keys in lsearch files need not
3820 contain colons. This was done some time before quoting was made available
3821 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3822 (notated using the quote facility) so as to distinguish them from IPv4
3823 keys. This meant that lookups for IP addresses in host lists did not work
3824 for iplsearch lookups.
3826 This has been fixed by arranging for IPv6 addresses to be expressed with
3827 colons if the lookup type is iplsearch. This is not incompatible, because
3828 previously such lookups could never work.
3830 The situation is now rather anomalous, since one *can* have colons in
3831 ordinary lsearch keys. However, making the change in all cases is
3832 incompatible and would probably break a number of configurations.
3834 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3837 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3838 conversion specification without a maximum field width, thereby enabling
3839 a rogue spamd server to cause a buffer overflow. While nobody in their
3840 right mind would setup Exim to query an untrusted spamd server, an
3841 attacker that gains access to a server running spamd could potentially
3842 exploit this vulnerability to run arbitrary code as the Exim user.
3844 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3845 $primary_hostname instead of what libspf2 thinks the hosts name is.
3847 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3848 a directory entry by the name of the lookup key. Previously, if a
3849 symlink pointed to a non-existing file or a file in a directory that
3850 Exim lacked permissions to read, a lookup for a key matching that
3851 symlink would fail. Now it is enough that a matching directory entry
3852 exists, symlink or not. (Bugzilla 503.)
3854 PH/03 The body_linecount and body_zerocount variables are now exported in the
3857 PH/04 Added the $dnslist_matched variable.
3859 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3860 This means they are set thereafter only if the connection becomes
3863 PH/06 Added the client_condition to authenticators so that some can be skipped
3864 by clients under certain conditions.
3866 PH/07 The error message for a badly-placed control=no_multiline_responses left
3867 "_responses" off the end of the name.
3869 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3871 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3872 (without spaces) instead of just copying the configuration text.
3874 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3876 PH/11 Added $max_received_linelength.
3878 PH/12 Added +ignore_defer and +include_defer to host lists.
3880 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3881 way in which PCRE > 7.0 is built.
3883 PH/14 Implemented queue_only_load_latch.
3885 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3886 MAIL command. The effect was to mangle the value on 64-bit systems.
3888 PH/16 Another patch from the Sieve maintainer.
3890 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3892 PH/18 If a system quota error occurred while trying to create the file for
3893 a maildir delivery, the message "Mailbox is full" was not appended to the
3894 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3895 only to a quota excession during the actual writing of the file.
3897 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3898 characters?) which causes problems in log lines. The DN values are now
3899 passed through string_printing() before being added to log lines.
3901 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3902 and InterBase are left for another time.)
3904 PH/21 Added message_body_newlines option.
3906 PH/22 Guard against possible overflow in moan_check_errorcopy().
3908 PH/23 POSIX allows open() to be a macro; guard against that.
3910 PH/24 If the recipient of an error message contained an @ in the local part
3911 (suitably quoted, of course), incorrect values were put in $domain and
3912 $local_part during the evaluation of errors_copy.
3918 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3919 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3922 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3923 issue a MAIL command.
3925 PH/02 In an ACL statement such as
3927 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3929 if a client was not listed at all, or was listed with a value other than
3930 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3931 the condition was not true (as it should be), so access was not denied.
3932 The bug was that the ! inversion was incorrectly passed on to the second
3933 item. This has been fixed.
3935 PH/03 Added additional dnslists conditions == and =& which are different from
3936 = and & when the dns lookup returns more than one IP address.
3938 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3939 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3941 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3942 FSYNC, which compiles an option called disable_fsync that allows for
3943 bypassing fsync(). The documentation is heavily laced with warnings.
3945 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3947 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3948 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3949 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3950 including adding "make clean"; (3) Added -fPIC when compiling the test
3951 dynamically loaded module, to get rid of a warning.
3953 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3954 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3955 = 0s. The bug is otherwise harmless.
3957 PH/07 There was a bug in the dovecot authenticator such that the value of
3958 $auth1 could be overwritten, and so not correctly preserved, after a
3959 successful authentication. This usually meant that the value preserved by
3960 the server_setid option was incorrect.
3962 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3964 PH/09 Installed PCRE release 7.0.
3966 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3967 run for batched SMTP input. It is now run at the start of every message
3968 in the batch. While fixing this I discovered that the process information
3969 (output by running exiwhat) was not always getting set for -bs and -bS
3970 input. This is fixed, and it now also says "batched" for BSMTP.
3972 PH/11 Added control=no_pipelining.
3974 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3975 patch, slightly modified), and move the expansion of helo_data till after
3976 the connection is made in the smtp transport (so it can use these
3979 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3981 PH/14 Added log_selector = +pid.
3983 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3985 PH/16 Add ${if forany and ${if forall.
3987 PH/17 Added dsn_from option to vary the From: line in DSNs.
3989 PH/18 Flush SMTP output before performing a callout, unless control =
3990 no_callout_flush is set.
3992 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3993 was true (the default) a successful delivery failed to delete the retry
3994 item, thus causing premature timeout of the address. The bug is now
3997 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3999 PH/21 Long custom messages for fakedefer and fakereject are now split up
4000 into multiline responses in the same way that messages for "deny" and
4001 other ACL rejections are.
4003 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
4004 with slight modification.
4006 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
4007 draft, changing the syntax and factoring some duplicate code".
4009 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
4010 for deliveries of the second and subsequent messages over the same SMTP
4013 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
4014 ${reduce, with only minor "tidies".
4016 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
4018 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
4019 expansion side effects.
4021 PH/27 When a message times out after an over-quota error from an Exim-imposed
4022 quota, the bounce message says "mailbox is full". This message was not
4023 being given when it was a system quota that was exceeded. It now should
4026 MH/03 Made $recipients available in local_scan(). local_scan() already has
4027 better access to the recipient list through recipients_list[], but
4028 $recipients can be useful in postmaster-provided expansion strings.
4030 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
4031 in the case of a MAIL command with additional options following the
4032 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
4033 were accidentally chopped off.
4035 PH/29 SMTP synchronization checks are implemented when a command is read -
4036 there is a check that no more input is waiting when there shouldn't be
4037 any. However, for some commands, a delay in an ACL can mean that it is
4038 some time before the response is written. In this time, more input might
4039 arrive, invalidly. So now there are extra checks after an ACL has run for
4040 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4041 pipelining has not been advertised.
4043 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4045 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4046 returned in the SMTP response when smtp_return_error_details was false.
4047 This has been fixed.
4049 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4050 instead of the C I/O that was originally supplied, because problems were
4051 reported on Solaris.
4053 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4054 Exim which did not show up earlier: it was assuming that a call to
4055 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4056 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4057 was a macro that became an assignment, so it seemed to work. This has
4058 changed to a proper function call with a void return, hence the compile
4059 error. Exim's code has been fixed.
4061 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4064 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4066 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4068 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4069 because it turns out to be too big or there is a timeout) there is no
4070 "Completed" line in the log. When some messages of this type were
4071 selected by exigrep, they were listed as "not completed". Others were
4072 picked up by some special patterns. I have improved the selection
4073 criteria to be more general.
4075 PH/38 The host_find_failed option in the manualroute router can now be set
4076 to "ignore", to completely ignore a host whose IP address cannot be
4077 found. If all hosts are ignored, the behaviour is controlled by the new
4078 host_all_ignored option.
4080 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4081 homing or because of multiple MX records with /mx) generated more than
4082 one IP address, and the following item turned out to be the local host,
4083 all the secondary addresses of the first item were incorrectly removed
4084 from the list, along with the local host and any following hosts (which
4085 is what is supposed to happen).
4087 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4088 whoever called Exim into the -H file. In the case of the daemon it was
4089 behaving confusingly. When first started, it used values for whoever
4090 started the daemon, but after a SIGHUP it used the Exim user (because it
4091 calls itself on a restart). I have changed the code so that it now always
4094 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4095 message are rejected with the same error (e.g. no authentication or bad
4096 sender address), and a DATA command is nevertheless sent (as can happen
4097 with PIPELINING or a stupid MUA), the error message that was given to the
4098 RCPT commands is included in the rejection of the DATA command. This is
4099 intended to be helpful for MUAs that show only the final error to their
4102 PH/42 Another patch from the Sieve maintainer.
4104 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4105 Eximstats - Fixed some broken HTML links and added missing column headers
4107 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4108 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4110 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4112 PH/43 Yet another patch from the Sieve maintainer.
4114 PH/44 I found a way to check for a TCP/IP connection going away before sending
4115 the response to the final '.' that terminates a message, but only in the
4116 case where the client has not sent further data following the '.'
4117 (unfortunately, this is allowed). However, in many cases there won't be
4118 any further data because there won't be any more messages to send. A call
4119 to select() can be used: if it shows that the input is "ready", there is
4120 either input waiting, or the socket has been closed. An attempt to read
4121 the next input character can distinguish the two cases. Previously, Exim
4122 would have sent an OK response which the client would never have see.
4123 This could lead to message repetition. This fix should cure that, at
4124 least in a lot of common cases.
4126 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4127 advertised in response to EHLO.
4133 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4134 fixed by 4.65/MH/01 (is this a record?) are fixed:
4136 (i) An empty string was always treated as zero by the numeric comparison
4137 operators. This behaviour has been restored.
4139 (ii) It is documented that the numeric comparison operators always treat
4140 their arguments as decimal numbers. This was broken in that numbers
4141 starting with 0 were being interpreted as octal.
4143 While fixing these problems I realized that there was another issue that
4144 hadn't been noticed. Values of message_size_limit (both the global option
4145 and the transport option) were treated as octal if they started with 0.
4146 The documentation was vague. These values are now always treated as
4147 decimal, and I will make that clear in the documentation.
4153 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4154 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4157 MH/01 Don't check that the operands of numeric comparison operators are
4158 integers when their expansion is in "skipping" mode (fixes bug
4159 introduced by 4.64-PH/07).
4161 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4162 child addresses, Exim now panics and dies. Previously, because the count
4163 is held in a short int, deliveries were likely to be lost. As such a
4164 large number of recipients for a single message is ridiculous
4165 (performance will be very, very poor), I have chosen to impose a limit
4166 rather than extend the field.
4172 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4173 leftover -K file (the existence of which was triggered by #402).
4174 While we were at it, introduced process PID as part of the -K
4175 filename. This should rule out race conditions when creating
4178 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4179 processing considerably. Previous code took too long for large mails,
4180 triggering a timeout which in turn triggers #401.
4182 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4183 in the DK code in transports.c. sendfile() is not really portable,
4184 hence the _LINUX specificness.
4186 TF/01 In the add_headers option to the mail command in an Exim filter,
4187 there was a bug that Exim would claim a syntax error in any
4188 header after the first one which had an odd number of characters
4191 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4192 callout verification, Exim cached a "reject" for the entire domain. This
4193 is correct for most verifications, but it is not correct for a recipient
4194 verification with use_sender or use_postmaster set, because in that case
4195 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4196 case of MAIL FROM:<> rejection from other early rejections (e.g.
4197 rejection of HELO). When verifying a recipient using a non-null MAIL
4198 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4199 Whatever the result of the callout, the value of the domain cache is
4200 left unchanged (for any other kind of callout, getting as far as trying
4201 RCPT means that the domain itself is ok).
4203 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4206 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4207 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4208 session, the daemon ignores ECONNECT errors and logs others; it now
4209 ignores EPIPE as well.
4211 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4212 (quoted-printable decoding).
4214 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4215 later the small subsequent patch to fix an introduced bug.
4217 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4219 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4221 PH/08 An error is now given if message_size_limit is specified negative.
4223 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4224 to be given (somewhat) arbitrary names.
4226 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4229 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4230 miscellaneous code fixes
4232 PH/10 Added the log_reject_target ACL modifier to specify where to log
4235 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4236 hostname. This is wrong, because it relates to the incoming message (and
4237 probably the interface on which it is arriving) and not to the outgoing
4238 callout (which could be using a different interface). This has been
4239 changed to use the value of the helo_data option from the smtp transport
4240 instead - this is what is used when a message is actually being sent. If
4241 there is no remote transport (possible with a router that sets up host
4242 addresses), $smtp_active_hostname is used.
4244 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4245 tweaks were necessary in order to get it to work (see also 21 below):
4246 (a) The code assumed that strncpy() returns a negative number on buffer
4247 overflow, which isn't the case. Replaced with Exim's string_format()
4249 (b) There were several signed/unsigned issues. I just did the minimum
4250 hacking in of casts. There is scope for a larger refactoring.
4251 (c) The code used strcasecmp() which is not a standard C function.
4252 Replaced with Exim's strcmpic() function.
4253 (d) The code set only $1; it now sets $auth1 as well.
4254 (e) A simple test gave the error "authentication client didn't specify
4255 service in request". It would seem that Dovecot has changed its
4256 interface. Fortunately there's a specification; I followed it and
4257 changed what the client sends and it appears to be working now.
4259 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4262 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4263 address A is aliased to B and C, where B exists and C does not. Without
4264 -v the output is "A verified" because verification stops after a
4265 successful redirection if more than one address is generated. However,
4266 with -v the child addresses are also verified. Exim was outputting "A
4267 failed to verify" and then showing the successful verification for C,
4268 with its parentage. It now outputs "B failed to verify", showing B's
4269 parentage before showing the successful verification of C.
4271 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4272 look up a TXT record in a specific list after matching in a combined
4275 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4276 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4277 they consult the DNS. I had assumed they would set it the way they
4278 wanted; and indeed my experiments on Linux seem to show that in some
4279 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4280 To be on the safe side, however, I have now made the interface to
4281 host_find_byname() similar to host_find_bydns(), with an argument
4282 containing the DNS resolver options. The host_find_byname() function now
4283 sets these options at its start, just as host_find_bydns() does. The smtp
4284 transport options dns_qualify_single and dns_search_parents are passed to
4285 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4286 of host_find_byname() use the default settings of RES_DEFNAMES
4287 (qualify_single) but not RES_DNSRCH (search_parents).
4289 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4290 spool_read_header() do less string testing, by means of a preliminary
4291 switch on the second character of optional "-foo" lines. (This is
4292 overdue, caused by the large number of possibilities that now exist.
4293 Originally there were few.) While I was there, I also converted the
4294 str(n)cmp tests so they don't re-test the leading "-" and the first
4295 character, in the hope this might squeeze out yet more improvement.
4297 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4298 flag allowing group syntax was set by the header_syntax check but not
4299 turned off, possible causing trouble later; (2) The flag was not being
4300 set at all for the header_verify test, causing "group"-style headers to
4301 be rejected. I have now set it in this case, and also caused header_
4302 verify to ignore an empty address taken from a group. While doing this, I
4303 came across some other cases where the code for allowing group syntax
4304 while scanning a header line wasn't quite right (mostly, not resetting
4305 the flag correctly in the right place). These bugs could have caused
4306 trouble for malformed header lines. I hope it is now all correct.
4308 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4309 with the "reply" argument non-NULL. The code, however (which originally
4310 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4311 but it didn't always do it. This confused somebody who was copying the
4312 code for some other use. I have removed all the tests.
4314 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4315 feature that was used to support insecure browsers during the U.S. crypto
4316 embargo. It requires special client support, and Exim is probably the
4317 only MTA that supported it -- and would never use it because real RSA is
4318 always available. This code has been removed, because it had the bad
4319 effect of slowing Exim down by computing (never used) parameters for the
4320 RSA_EXPORT functionality.
4322 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4323 authenticator to fail if there's a tab character in the incoming data
4324 (there should never be unless someone is messing about, as it's supposed
4325 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4326 if the connection is using TLS or if the remote IP is the same as the
4327 local IP, and the "valid-client-cert option" if a client certificate has
4330 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4331 authenticators. This can be used for authorization after authentication
4332 succeeds. (In the case of plaintext, it servers for both authentication
4335 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4336 if any retry times were supplied.
4338 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4339 connection, where there is no client IP address to check. In this
4340 situation, the verify now always succeeds.
4342 PH/25 Applied John Jetmore's -Mset patch.
4344 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4346 PH/27 In a string expansion for a processed (not raw) header when multiple
4347 headers of the same name were present, leading whitespace was being
4348 removed from all of them, but trailing whitespace was being removed only
4349 from the last one. Now trailing whitespace is removed from each header
4350 before concatenation. Completely empty headers in a concatenation (as
4351 before) are ignored.
4353 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4354 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4356 PH/29 [Removed. This was a change that I later backed out, and forgot to
4357 correct the ChangeLog entry (that I had efficiently created) before
4358 committing the later change.]
4360 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4361 address errors (4xx response to RCPT) over the same connection as other
4362 messages routed to the same hosts. Such deliveries are always "forced",
4363 so retry times are not inspected. This resulted in far too many retries
4364 for the affected addresses. The effect occurred only when there were more
4365 hosts than the hosts_max_try setting in the smtp transport when it had
4366 the 4xx errors. Those hosts that it had tried were not added to the list
4367 of hosts for which the message was waiting, so if all were tried, there
4368 was no problem. Two fixes have been applied:
4370 (i) If there are any address or message errors in an SMTP delivery, none
4371 of the hosts (tried or untried) are now added to the list of hosts
4372 for which the message is waiting, so the message should not be a
4373 candidate for sending over the same connection that was used for a
4374 successful delivery of some other message. This seems entirely
4375 reasonable: after all the message is NOT "waiting for some host".
4376 This is so "obvious" that I'm not sure why it wasn't done
4377 previously. Hope I haven't missed anything, but it can't do any
4378 harm, as the worst effect is to miss an optimization.
4380 (ii) If, despite (i), such a delivery is accidentally attempted, the
4381 routing retry time is respected, so at least it doesn't keep
4382 hammering the server.
4384 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4385 in ${readsocket because some servers need this prod.
4387 PH/32 Added some extra debug output when updating a wait-xxx database.
4389 PH/33 The hint "could be header name not terminated by colon", which has been
4390 given for certain expansion errors for a long time, was not being given
4391 for the ${if def:h_colon_omitted{... case.
4393 PH/34 The spec says: "With one important exception, whenever a domain list is
4394 being scanned, $domain contains the subject domain." There was at least
4395 one case where this was not true.
4397 PH/35 The error "getsockname() failed: connection reset by peer" was being
4398 written to the panic log as well as the main log, but it isn't really
4399 panic-worthy as it just means the connection died rather early on. I have
4400 removed the panic log writing for the ECONNRESET error when getsockname()
4403 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4404 runs only) independently of the message's sender address. This meant
4405 that, if the 4xx error was in fact related to the sender, a different
4406 message to the same recipient with a different sender could confuse
4407 things. In particular, this can happen when sending to a greylisting
4408 server, but other circumstances could also provoke similar problems.
4409 I have changed the default so that the retry time for these errors is now
4410 based a combination of the sender and recipient addresses. This change
4411 can be overridden by setting address_retry_include_sender=false in the
4414 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4415 remote server are returned as part of bounce messages. This was not
4416 happening for LMTP over a pipe (the lmtp transport), but now it is the
4417 same for both kinds of LMTP.
4419 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4420 in header lines that were in fact CNAMEs. This is no longer the case.
4422 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4423 and queue runs started by the daemon processed all messages. This has
4424 been fixed so that -R and -S can now usefully be given with -q<time>.
4426 PH/40 Import PCRE release 6.7 (fixes some bugs).
4428 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4430 PH/42 Give an error if -q is specified more than once.
4432 PH/43 Renamed the variables $interface_address and $interface_port as
4433 $received_ip_address and $received_port, to make it clear that these
4434 values apply to message reception, and not to the outgoing interface when
4435 a message is delivered. (The old names remain recognized, of course.)
4437 PH/44 There was no timeout on the connect() call when using a Unix domain
4438 socket in the ${readsocket expansion. There now is.
4440 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4441 be meaningful with "accept".
4443 SC/01 Eximstats V1.43
4444 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4446 SC/02 Eximstats V1.44
4447 Use a glob alias rather than an array ref in the generated
4448 parser. This improves both readability and performance.
4450 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4451 Collect SpamAssassin and rejection statistics.
4452 Don't display local sender or destination tables unless
4453 there is data to show.
4454 Added average volumes into the top table text output.
4456 SC/04 Eximstats V1.46
4457 Collect data on the number of addresses (recipients)
4458 as well as the number of messages.
4460 SC/05 Eximstats V1.47
4461 Added 'Message too big' to the list of mail rejection
4462 reasons (thanks to Marco Gaiarin).
4464 SC/06 Eximstats V1.48
4465 Mainlog lines which have GMT offsets and are too short to
4466 have a flag are now skipped.
4468 SC/07 Eximstats V1.49 (Alain Williams)
4469 Added the -emptyok flag.
4471 SC/08 Eximstats V1.50
4472 Fixes for obtaining the IP address from reject messages.
4474 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4475 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4476 whitespace changes from 4.64-PH/27
4478 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4481 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4482 are found, allow negative numbers in numeric criteria)
4484 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4486 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4487 to match changes made in 4.64-PH/43
4489 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4491 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4492 "domain" is actually an IP address, and force a failure. This locks out
4493 those revolvers/nameservers that support "A-for-A" lookups, in
4494 contravention of the specifications.
4496 PH/48 When a host name was looked up from an IP address, and the subsequent
4497 forward lookup of the name timed out, the host name was left in
4498 $sender_host_name, contrary to the specification.
4500 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4501 restricted to single-key lookups, Exim was not diagnosing an error if
4502 * or *@ was used with a query-style lookup.
4504 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4506 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4507 long ago, but noone interested enough thought of it. Let's just say that
4508 the "1.1" means that there are some new functions that weren't there at
4509 some point in the past.
4511 PH/51 Error processing for expansion failure of helo_data from an smtp
4512 transport during callout processing was broken.
4514 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4515 tested/used via the -bh/-bhc/-bs options.
4517 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4518 bug, fixed in subsequent PCRE releases).
4520 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4521 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4523 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4529 SC/01 Use a glob alias rather than an array ref in eximstats generated
4530 parser. This improves both readability and performance.
4532 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4533 Don't display local sender or destination tables in eximstats unless
4534 there is data to show.
4535 Added average volumes into the eximstats top table text output.
4537 SC/03 Collect data on the number of addresses (recipients) as well
4538 as the number of messages in eximstats.
4540 TF/01 Correct an error in the documentation for the redirect router. Exim
4541 does (usually) call initgroups() when daemonizing.
4543 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4544 with consistent privilege compared to when running as a daemon.
4546 TF/03 Note in the spec that $authenticated_id is not set for local
4547 submissions from trusted users.
4549 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4550 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4552 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4553 by adding some example configuration directives to the default
4554 configuration file. A little bit of work is required to uncomment the
4555 directives and define how usernames and passwords are checked, but
4556 there is now a framework to start from.
4558 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4559 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4560 without this. I don't know how relevant this is to other LDAP libraries.
4562 PH/02 Add the verb name to the "unknown ACL verb" error.
4564 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4566 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4568 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4569 directory not expanded when it should be if an expanded home directory
4570 was set for the address (which is overridden by the transport).
4572 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4575 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4576 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4577 because it is too late at that time, and has no effect.
4579 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4580 security issue with \' (bugzilla #107). I could not use the
4581 PQescapeStringConn() function, because it needs a PGconn value as one of
4584 PH/08 When testing addresses using -bt, indicate those final addresses that
4585 are duplicates that would not cause an additional delivery. At least one
4586 person was confused, thinking that -bt output corresponded to deliveries.
4587 (Suppressing duplicates isn't a good idea as you lose the information
4588 about possibly different redirections that led to the duplicates.)
4590 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4591 systems where poll() doesn't work, in particular OS X.
4593 PH/10 Added more information to debugging output for retry time not reached.
4595 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4596 operations in malware.c.
4598 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4601 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4602 syslog_duplication set false, log lines that would normally be written
4603 both the the main log and to the reject log were not written to syslog at
4606 PH/14 In the default configuration, change the use of "message" in ACL warn
4607 statements to "add_header".
4609 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4610 not followed by a command (e.g. "seen endif").
4612 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4613 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4616 PH/17 Added extra conditions to the default value of delay_warning_condition
4620 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4621 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4622 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4625 The Auto-Submitted: and various List- headers are standardised, whereas I
4626 don't think Precedence: ever was.
4628 PH/18 Refactored debugging code in route_finduser() to show more information,
4629 in particular, the error code if getpwnam() issues one.
4631 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4632 This is apparently needed in addition to the PH/07 change above to avoid
4633 any possible encoding problems.
4635 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4636 but not after initializing Perl.
4638 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4639 output them only if debugging. By default they are written stderr,
4640 apparently, which is not desirable.
4642 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4645 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4648 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4650 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4651 authenticated or an ident call has been made. Suppress the default
4652 values for $authenticated_id and $authenticated_sender (but permit -oMai
4653 and -oMas) when testing with -bh.
4655 PH/24 Re-jigged the order of the tests in the default configuration so that the
4656 tests for valid domains and recipients precede the DNS black list and CSA
4657 tests, on the grounds that those ones are more expensive.
4659 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4660 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4661 This bug exists in every version of Exim that I still have, right back to
4664 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4665 However, an attempt to turn on case-sensitivity in a regex key by
4666 including (?-i) didn't work because the subject string was already
4667 lowercased, and the effects were non-intuitive. It turns out that a
4668 one-line patch can be used to allow (?-i) to work as expected.
4674 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4675 other effects) broke the use of negated acl sub-conditions.
4677 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4680 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4681 "Deny" causes Exim to reject the incoming connection with a 554 error.
4682 Unfortunately, if there is a major crisis, such as a disk failure,
4683 tcp-wrappers gives "deny", whereas what one would like would be some
4684 kind of temporary error. A kludge has been added to help with this.
4685 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4686 554 error is used if errno is still zero or contains ENOENT (which occurs
4687 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4690 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4692 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4693 errors. Otherwise a message that provokes a temporary error (when other
4694 messages do not) can cause a whole host to time out.
4696 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4697 addresses were routed directly to files or pipes from a redirect router.
4698 File deliveries just didn't batch; pipe deliveries might have suffered
4701 PH/06 A failure to get a lock for a hints database would erroneously always say
4702 "Failed to get write lock", even when it was really a read lock.
4704 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4705 of 0600. This has been changed to use the value of the lockfile_mode
4706 option (which defaults to 0600).
4708 PH/08 Applied small patch from the Sieve maintainer.
4710 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4711 folder from quota calculations, a direct delivery into this folder messed
4712 up the contents of the maildirsize file. This was because the regex was
4713 used only to exclude .Trash (or whatever) when the size of the mailbox
4714 was calculated. There was no check that a delivery was happening into an
4715 excluded directory. This bug has been fixed by ignoring all quota
4716 processing for deliveries into excluded directories.
4718 PH/10 Added the maildirfolder_create_regex option to appendfile.
4724 PH/01 The code for finding all the local interface addresses on a FreeBSD
4725 system running IPv6 was broken. This may well have applied to all BSD
4726 systems, as well as to others that have similar system calls. The broken
4727 code found IPv4 interfaces correctly, but gave incorrect values for the
4728 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4729 that it would not match correctly against @[] and not recognize the IPv6
4732 PH/02 The ipliteral router was not recognizing addresses of the form user@
4733 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4735 PH/03 Added disable_ipv6.
4737 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4738 decoded form, because it is most often used to construct To: headers
4739 lines in autoreplies, and the decoded form may well be syntactically
4740 invalid. However, $reply_address has leading white space removed, and all
4741 newlines turned into spaces so that the autoreply transport does not
4744 PH/05 If group was specified without a user on a router, and no group or user
4745 was specified on a transport, the group from the router was ignored.
4747 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4748 for visible compile-time settings that can be used to change these
4749 numbers, for those that want even more. Backwards compatibility with old
4750 spool files has been maintained. However, going back to a previous Exim
4751 release will lost any variables that are in spool files.
4753 PH/07 Two small changes when running in the test harness: increase delay when
4754 passing a TCP/IP connection to a new process, in case the original
4755 process has to generate a bounce, and remove special handling of
4756 127.0.0.2 (sic), which is no longer necessary.
4758 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4759 be the same on different OS.
4761 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4764 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4765 whether --show-vars was specified or not
4767 JJ/02 exipick: Added support for new ACL variable spool format introduced
4770 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4771 syntactically invalid From: or Reply-to: line, and a filter used this to
4772 generate an autoreply, and therefore failed to obtain an address for the
4773 autoreply, Exim could try to deliver to a non-existent relative file
4774 name, causing unrelated and misleading errors. What now happens is that
4775 it logs this as a hard delivery error, but does not attempt to create a
4778 PH/11 The exinext utility has a -C option for testing purposes, but although
4779 the given file was scanned by exinext itself; it wasn't being passed on
4780 when Exim was called.
4782 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4783 an end-of-file indication when reading a command response.
4785 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4786 compiled. In many other places in Exim, IPv6 addresses are always
4787 recognized, so I have changed this. It also means that IPv4 domain
4788 literals of the form [IPV4:n.n.n.n] are now always recognized.
4790 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4791 used if the router is not running as root, for example, when verifying at
4792 ACL time, or when using -bh. The debugging output from this situation was
4793 non-existent - all you got was a failure to exec. I have made two
4796 (a) Failures to set uid/gid, the current directory, or a process leader
4797 in a subprocess such as that created by queryprogram now generate
4798 suitable debugging output when -d is set.
4800 (b) The queryprogram router detects when it is not running as root,
4801 outputs suitable debugging information if -d is set, and then runs
4802 the subprocess without attempting to change uid/gid.
4804 PH/15 Minor change to Makefile for building test_host (undocumented testing
4807 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4808 additional section of a DNS packet that returns MX or SRV records.
4809 Instead, it always explicitly searches for A/AAAA records. This avoids
4810 major problems that occur when a DNS server includes only records of one
4811 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4812 fixed another bug: if SRV records were looked up and the corresponding
4813 address records were *not* found in the additional section, the port
4814 values from the SRV records were lost.
4816 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4817 using the correct key (the original address) when searching the retry
4818 rules in order to find which one to use for generating the retry hint.
4820 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4821 adding the default one. Similarly, if it contains a Reply-To: header, the
4822 errors_reply_to option, if set, is not used.
4824 PH/19 When calculating a retry time, Exim used to measure the "time since
4825 failure" by looking at the "first failed" field in the retry record. Now
4826 it does not use this if it is later than than the arrival time of the
4827 message. Instead it uses the arrival time. This makes for better
4828 behaviour in cases where some deliveries succeed, thus re-setting the
4829 "first failed" field. An example is a quota failure for a huge message
4830 when small messages continue to be delivered. Without this change, the
4831 "time since failure" will always be short, possible causing more frequent
4832 delivery attempts for the huge message than are intended.
4833 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4835 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4836 $1, $2, $3) because the numerical variables can be reset during some
4837 expansion items (e.g. "match"), thereby losing the authentication data.
4839 PH/21 Make -bV show the size of off_t variables so that the test suite can
4840 decide whether to run tests for quotas > 2G.
4842 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4843 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4844 filecount value is greater than 2G or if a quota value is greater than 2G
4845 on a system where the size of off_t is not greater than 4, a panic error
4848 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4849 never match. The debug and -bh output now contains an explicit error
4850 message indicating a malformed IPv4 address or mask.
4852 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4853 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4854 PH/23 above applies.
4856 PH/25 Do not write to syslog when running in the test harness. The only
4857 occasion when this arises is a failure to open the main or panic logs
4858 (for which there is an explicit test).
4860 PH/26 Added the /no_tell option to "control=freeze".
4862 PH/27 If a host name lookup failed very early in a connection, for example, if
4863 the IP address matched host_lookup and the reverse lookup yielded a name
4864 that did not have a forward lookup, an error message of the form "no IP
4865 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4866 could be logged. Now it outputs the IP address instead of "NULL".
4868 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4869 allows the sender and the authenticated sender to be set when
4870 submitting a message from within Exim. Since child_open_exim() is
4871 documented for local_scan(), the new function should be too.
4873 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4874 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4875 results in an empty string is now treated as unset.
4877 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4879 PH/31 Added sender_verify_fail logging option.
4881 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4882 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4883 tidied the source and removed it altogether.
4885 PH/33 When a queue run was abandoned because the load average was too high, a
4886 log line was always written; now it is written only if the queue_run log
4887 selector is set. In addition, the log line for abandonment now contains
4888 information about the queue run such as the pid. This is always present
4889 in "start" and "stop" lines but was omitted from the "abandon" line.
4891 PH/34 Omit spaces between a header name and the colon in the error message that
4892 is given when verify = headers_syntax fails (if there are lots of them,
4893 the message gets confusing).
4895 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4896 names, as there are now some PTR records that contain slashes. This check
4897 is only to protect against broken name servers that fall over on strange
4898 characters, so the fact that it applies to all lookups doesn't matter.
4900 PH/36 Now that the new test suite is complete, we can remove some of the
4901 special code in Exim that was needed for the old test suite. For example,
4902 sorting DNS records because real resolvers return them in an arbitrary
4903 order. The new test suite's fake resolver always returns records in the
4906 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4907 bounces) except when queue_only is set, to avoid logging races between
4908 the different processes.
4910 PH/38 Panic-die if .include specifies a non-absolute path.
4912 PH/39 A tweak to the "H" retry rule from its user.
4914 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4915 a label. They prevented compilation on older perls.
4917 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4918 a warning to be raised on newish perls.
4920 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4921 on queue. Changes to match documented behaviour of showing count of
4922 messages matching specified criteria.
4924 PH/40 Changed the default ident timeout from 30s to 5s.
4926 PH/41 Added support for the use of login_cap features, on those BSD systems
4927 that have them, for controlling the resources used by pipe deliveries.
4929 PH/42 The content-scanning code uses fopen() to create files in which to put
4930 message data. Previously it was not paying any attention to the mode of
4931 the files. Exim runs with umask(0) because the rest of the code creates
4932 files with open(), and sets the required mode explicitly. Thus, these
4933 files were ending up world-writeable. This was not a big issue, because,
4934 being within the spool directory, they were not world-accessible. I have
4935 created a function called modefopen, which takes an additional mode
4936 argument. It sets umask(777), creates the file, chmods it to the required
4937 mode, then resets the umask. All the relevant calls to fopen() in the
4938 content scanning code have been changed to use this function.
4940 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4941 to 24 hours. This avoids potential overflow problems when processing G
4942 and H retry rules. I suspect nobody ever tinkers with this value.
4944 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4946 PH/45 When the plaintext authenticator is running as a client, the server's
4947 challenges are checked to ensure they are valid base64 strings. By
4948 default, the authentication attempt is cancelled if an invalid string is
4949 received. Setting client_ignore_invalid_base64 true ignores these errors.
4950 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4951 they are received. Thus, the responses can be made to depend on the
4952 challenges. If an invalid string is ignored, an empty string is placed in
4955 PH/46 Messages that are created by the autoreply transport now contains a
4956 References: header, in accordance with RFCs 2822 and 3834.
4958 PH/47 Added authenticated_sender_force to the smtp transport.
4960 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4962 PH/49 Installed latest patch from the Sieve maintainer.
4964 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4965 was also set, the appendfile transport was unnecessarily scanning a
4966 directory of message files (e.g. for maildir delivery) to find the count
4967 of files (along with the size), even though it did not need this
4968 information. It now does the scan only if it needs to find either the
4969 size of the count of files.
4971 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4973 PH/52 Two bugs concerned with error handling when the smtp transport is
4976 (i) Exim was not creating retry information for temporary errors given
4977 for individual recipients after the DATA command when the smtp transport
4978 was used in LMTP mode. This meant that they could be retried too
4979 frequently, and not timed out correctly.
4981 (ii) Exim was setting the flag that allows error details to be returned
4982 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4983 recipients that were returned after the DATA command.
4985 PH/53 This is related to PH/52, but is more general: for any failing address,
4986 when detailed error information was permitted to be returned to the
4987 sender, but the error was temporary, then after the final timeout, only
4988 "retry timeout exceeded" was returned. Now it returns the full error as
4989 well as "retry timeout exceeded".
4991 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4992 do this, and (what is worse) MTAs that accept it.
4994 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4995 will now be deprecated.
4997 PH/56 New os.c-cygwin from the Cygwin maintainer.
4999 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
5000 formats (previously only available in exim formats via -bpr, -bpru,
5001 and -bpra. Now also available in native and exiqgrep formats)
5003 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
5004 with very large, slow to parse queues
5006 JJ/08 exipick: added ! as generic prefix to negate any criteria format
5008 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
5010 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
5011 responses to authentication challenges, though it was showing the
5012 challenges; (ii) I've removed the CR characters from the debug output for
5015 PH/58 Allow for the insertion of a newline as well as a space when a string
5016 is turned into more than one encoded-word during RFC 2047 encoding. The
5017 Sieve code now uses this.
5019 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
5020 data_4xx, lost_connection, tls_required.
5022 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
5023 message was being sent as an SMTP response.
5025 PH/61 Add -l and -k options to exicyclog.
5027 PH/62 When verifying, if an address was redirected to one new address, so that
5028 verification continued, and the new address failed or deferred after
5029 having set something in $address_data, the value of $address_data was not
5030 passed back to the ACL. This was different to the case when no
5031 redirection occurred. The value is now passed back in both cases.
5033 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
5034 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
5035 use login_cap.h, so on its own it isn't the distinguishing feature. The
5036 new name refers directly to the setclassresources() function.
5038 PH/65 Added configuration files for NetBSD3.
5040 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5042 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5043 is preferred over IPv4.
5045 PH/68 The bounce_return_message and bounce_return_body options were not being
5046 honoured for bounces generated during the reception of non-SMTP messages.
5047 In particular, this applied to messages rejected by the ACL. This bug has
5048 been fixed. However, if bounce_return_message is true and bounce_return_
5049 body is false, the headers that are returned for a non-SMTP message
5050 include only those that have been read before the error was detected.
5051 (In the case of an ACL rejection, they have all been read.)
5053 PH/69 The HTML version of the specification is now built in a directory called
5054 spec_html instead of spec.html, because the latter looks like a path with
5055 a MIME-type, and this confuses some software.
5057 PH/70 Catch two compiler warnings in sieve.c.
5059 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5060 function verify_get_ident() calls ip_connect() to connect a socket, but
5061 if the "connect()" function timed out, ip_connect() used to close the
5062 socket. However, verify_get_ident() also closes the socket later, and in
5063 between Exim writes to the log, which may get opened at this point. When
5064 the socket was closed in ip_connect(), the log could get the same file
5065 descriptor number as the socket. This naturally causes chaos. The fix is
5066 not to close the socket in ip_connect(); the socket should be closed by
5067 the function that creates it. There was only one place in the code where
5068 this was missing, in the iplookup router, which I don't think anybody now
5069 uses, but I've fixed it anyway.
5071 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5072 well as to direct DNS lookups. Otherwise the handling of names in host
5073 lists is inconsistent and therefore confusing.
5079 PH/01 Two changes to the default runtime configuration:
5081 (1) Move the checks for relay_from_hosts and authenticated clients from
5082 after to before the (commented out) DNS black list checks.
5084 (2) Add control=submission to the relay_from_hosts and authenticated
5085 clients checks, on the grounds that messages accepted by these
5086 statements are most likely to be submissions.
5088 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5090 (1) Generate an error if the third argument for the ${prvs expansion is
5093 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5096 (3) Reset the variables that are obtained from the first argument of
5097 ${prvscheck and used in the second argument before leaving the code,
5098 because their memory is reclaimed, so using them afterwards may do
5101 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5102 one (it's much easier than Tom thought :-).
5104 (5) Because of (4), we can now allow for the use of $prvscheck_result
5105 inside the third argument.
5107 PH/03 For some reason, the default setting of PATH when running a command from
5108 a pipe transport was just "/usr/bin". I have changed it to
5111 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5112 anything to be listed in the output from -bV.
5114 PH/05 When a filter generated an autoreply, the entire To: header line was
5115 quoted in the delivery log line, like this:
5117 => >A.N.Other <ano@some.domain> <original@ddress> ...
5119 This has been changed so that it extracts the operative address. There
5120 may be more than one such address. If so, they are comma-separated, like
5123 => >ano@some.domain,ona@other.domain <original@ddress> ...
5125 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5126 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5127 not being looked up in the rDNS to get a host name, Exim was showing the
5128 IP address twice in Received: lines, even though the IP addresses were
5129 identical. For example:
5131 Received: from [1.2.3.4] (helo=[1.2.3.4])
5133 However, if the real host name was known, it was omitting the HELO data
5134 if it matched the actual IP address. This has been tidied up so that it
5135 doesn't show the same IP address twice.
5137 PH/07 When both +timestamp and +memory debugging was on, the value given by
5138 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5139 called by the debug printing, thereby overwriting the timestamp buffer.
5140 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5142 PH/08 When the original message was included in an autoreply transport, it
5143 always said "this is a copy of the message, including all the headers",
5144 even if body_only or headers_only was set. It now gives an appropriate
5147 PH/09 Applied a patch from the Sieve maintainer which:
5149 o fixes some comments
5150 o adds the (disabled) notify extension core
5151 o adds some debug output for the result of if/elsif tests
5152 o points to the current vacation draft in the documentation
5153 and documents the missing references header update
5157 o fixes a bug in processing the envelope test (when testing
5158 multiple envelope elements, the last element determined the
5161 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5162 Electronic Mail") by including:
5164 Auto-submitted: auto-generated
5166 in the messages that it generates (bounce messages and others, such as
5167 warnings). In the case of bounce messages for non-SMTP messages, there was
5168 also a typo: it was using "Auto_submitted" (underscore instead of
5169 hyphen). Since every message generated by Exim is necessarily in response
5170 to another message, thes have all been changed to:
5172 Auto-Submitted: auto-replied
5174 in accordance with these statements in the RFC:
5176 The auto-replied keyword:
5178 - SHOULD be used on messages sent in direct response to another
5179 message by an automatic process,
5181 - MUST NOT be used on manually-generated messages,
5183 - MAY be used on Delivery Status Notifications (DSNs) and Message
5184 Disposition Notifications (MDNs),
5186 - MUST NOT be used on messages generated by automatic or periodic
5187 processes, except for messages which are automatic responses to
5190 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5191 to the default Received: header definition.
5193 PH/12 Added log selector acl_warn_skipped (default on).
5195 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5196 variables because (a) they are in the wrong storage pool and (b) even if
5197 they were copied, it wouldn't work properly because of the caching.
5199 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5200 checking when decoding. Apparently there are clients that generate
5201 overlong encoded strings. Why am I not surprised?
5203 PH/15 If the first argument of "${if match_address" was not empty, but did not
5204 contain an "@" character, Exim crashed. Now it writes a panic log message
5205 and treats the condition as false.
5207 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5209 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5210 extension "envelope-auth". The code is finished and in agreement with
5211 other implementations, but there is no documentation so far and in fact,
5212 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5213 not changing the active code.
5215 Print executed "if" and "elsif" statements when debugging is used. This
5216 helps a great deal to understand what a filter does.
5218 Document more things not specified clearly in RFC3028. I had all this
5219 sorted out, when out of a sudden new issues came to my mind. Oops."
5221 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5224 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5225 canonical form (as documented). However, after a host name lookup from
5226 the IP address, check_host() was doing a simple string comparison with
5227 addresses acquired from the DNS when checking that the found name did
5228 have the original IP as one of its addresses. Since any found IPv6
5229 addresses are likely to be in abbreviated form, the comparison could
5230 fail. Luckily, there already exists a function for doing the comparison
5231 by converting both addresses to binary, so now that is used instead of
5232 the text comparison.
5234 PH/20 There was another similar case to PH/19, when a complete host name was
5235 given in a host list; looking up its IP address could give an abbreviated
5236 form, whereas the current host's name might or might not be abbreviated.
5237 The same fix has been applied.
5243 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5244 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5247 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5248 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5250 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5252 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5253 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5254 Also, for "Auto-Submitted", treat anything other than "no" as
5255 non-personal, in accordance with RFC 3834. (Previously it treated
5256 anything starting "auto-" as non-personal.)
5258 TF/01 The control=submission/name=... option had a problem with syntax
5259 errors if the name included a slash character. The /name= option
5260 now slurps the rest of the string, so it can include any characters
5261 but it must come last in the list of options (after /sender_retain
5264 PH/05 Some modifications to the interface to the fake nameserver for the new
5272 TK/01 Added the "success_on_redirect" address verification option. See
5273 NewStuff for rationale and an example.
5275 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5277 PH/02 Patch to exigrep to allow it to work on syslog lines.
5279 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5280 fread() to skip over the body file's header line, because in Cygwin the
5281 header line is locked and is inaccessible.
5283 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5284 co-exist for some time) to make it clear that it is the Exim ID that is
5285 referenced, not the Message-ID: header line.
5287 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5288 string_format() function, because snprintf() does not exist on all
5291 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5292 ${stat: expansion item.
5294 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5295 protocol synchronization error", to keep the pedants happy.
5297 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5298 well as for IRIX systems, when gcc is being used. See the host.c source
5301 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5303 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5306 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5307 transport and to the smtp transport in LMTP mode.
5309 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5311 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5312 run a filter in a subprocess. This could lead to confusion in subsequent
5313 lookups in the parent process. There should also be a search_tidyup() at
5314 the end of the subprocess.
5316 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5317 only if the host matched helo_try_verify_hosts, which caused the
5318 verification to occur when the EHLO/HELO command was issued. The ACL just
5319 tested the remembered result. Now, if a previous verification attempt has
5320 not happened, "verify = helo" does it there and then.
5322 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5324 TK/03 Fix log output including CR from clamd.
5326 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5327 exist provoked a memory error which could cause a segfault.
5329 PH/15 Installed PCRE 6.2
5331 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5333 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5334 of the problem. Specifically, suggested +O2 rather than +O1 for the
5337 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5339 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5340 record, the port was not correctly logged when the outgoing_port log
5341 selector was set (it logged the transort's default port).
5343 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5344 fallback_hosts, and "hosts" in the smtp transport.
5346 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5347 host errors such as "Connection refused".
5349 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5350 authentication with radiusclient 0.4.9:
5352 - Error returned from rc_read_config was caught wrongly
5353 - Username/password not passed on to radius server due to wrong length.
5355 The presumption is that some radiusclient API changes for 4.51/PH/17
5356 were not taken care of correctly. The code is still untested by me (my
5357 Linux distribution still has 0.3.2 of radiusclient), but it was
5358 contributed by a Radius user.
5360 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5361 expanding the "port" option of the smtp transport.
5363 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5364 while reading a MIME header. Thanks to Tom Hughes for a patch.
5366 PH/24 Include config.h inside local_scan.h so that configuration settings are
5369 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5370 that in an ACL for RCPT (for example), you can examine exactly what was
5373 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5374 commands, but it was not correctly comparing the address with the actual
5375 client host address. Thus, it would show the EHLO address in Received:
5376 header lines when this was not necessary.
5378 PH/27 Added the % operator to ${eval:}.
5380 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5381 it should be ignoring failures (because with -C, for example, it has lost
5382 privilege). It wasn't ignoring creation failures other than "already
5385 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5388 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5389 because an input line was too long, either on its own, or by virtue of
5390 too many continuations, the temporary file was not being removed, and the
5391 return code was incorrect.
5393 PH/31 Missing "BOOL" in function definition in filtertest.c.
5395 PH/32 Applied Sieve patches from the maintainer.
5397 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5399 PH/33 Added "verify = not_blind".
5401 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5402 Local/Makefile (with some defaults set). These are used in built scripts
5403 such as exicyclog, but they have never been used in the exim_install
5404 script (though there are many overriding facilities there). I have
5405 arranged that the exim_install script now takes note of these two
5408 PH/35 Installed configuration files for Dragonfly.
5410 PH/36 When a locally submitted message by a trusted user did not contain a
5411 From: header, and the sender address was obtained from -f or from an SMTP
5412 MAIL command, and the trusted user did not use -F to supply a sender
5413 name, $originator_name was incorrectly used when constructing a From:
5414 header. Furthermore, $originator_name was used for submission mode
5415 messages from external hosts without From: headers in a similar way,
5416 which is clearly wrong.
5418 PH/37 Added control=suppress_local_fixups.
5420 PH/38 When log_selector = +received_sender was set, and the addition of the
5421 sender made the log line's construction buffer exactly full, or one byte
5422 less than full, an overflow happened when the terminating "\n" was
5425 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5426 when the result of a list match is failure because a DNS lookup failed.
5428 PH/40 RM_COMMAND is now used in the building process.
5430 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5431 the "build-* directories that it finds.
5433 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5434 address in a domain literal was a prefix of an interface address.
5436 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5437 when verifying a sender address, unless rewrite_headers is false.
5439 PH/44 Wrote a long comment about why errors_to addresses are verified as
5440 recipients, not senders.
5442 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5443 the ratelimit ACL was added.
5445 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5447 PH/46 Added extra information about PostgreSQL errors to the error string.
5449 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5450 avoiding the need to install special zones in a real server. This is
5451 backwards compatible; if it can't find the fake resolver, it drops back.
5452 Thus, both old and new test suites can be run.
5454 TF/02 Added util/ratelimit.pl
5456 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5457 clock is set back in time.
5459 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5460 Candler <B.Candler@pobox.com>.
5462 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5463 OK for addresses that are the result of redirections.
5465 PH/48 A number of further additions for the benefit of the new test suite,
5466 including a fake gethostbyname() that interfaces to the fake DNS resolver
5469 TF/06 The fix for widen_domains has also been applied to qualify_single and
5470 search_parents which are the other dnslookup options that can cause
5473 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5476 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5478 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5479 service" if it encountered an MX record with an empty target hostname.
5480 The message is now "an MX or SRV record indicated no SMTP service".
5482 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5483 if the DNS of the sending site is misconfigured. This is quite a
5484 common situation. This change restores the behaviour of treating a
5485 helo verification defer as a failure.
5487 PH/51 If self=fail was set on a router, the bounce message did not include the
5488 actual error message.
5494 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5496 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5497 command itself ended in error, the underlying message about the transport
5498 filter timeout was being overwritten with the pipe command error. Now the
5499 underlying error message should be appended to the second error message.
5501 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5503 PH/02 Reduce the amount of output that "make" produces by default. Full output
5504 can still be requested.
5506 PH/03 The warning log line about a condition test deferring for a "warn" verb
5507 was being output only once per connection, rather than after each
5508 occurrence (because it was using the same function as for successful
5509 "warn" verbs). This seems wrong, so I have changed it.
5511 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5512 it should not have, which might have caused a crash in the right
5513 circumstances, but probably never did.
5515 PH/04 Installed a modified version of Tony Finch's patch to make submission
5516 mode fix the return path as well as the Sender: header line, and to
5517 add a /name= option so that you can make the user's friendly name appear
5520 TF/03 Added the control = fakedefer ACL modifier.
5522 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5523 Mark Lowes for thorough testing.
5525 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5527 TK/03 Merged latest SRS patch from Miles Wilton.
5529 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5530 with the definition in sysexits.h (which is #included earlier).
5531 Fortunately, Exim does not actually use EX_OK. The code used to try to
5532 preserve the sysexits.h value, by assuming that macro definitions were
5533 scanned for macro replacements. I have been disabused of this notion,
5534 so now the code just undefines EX_OK before #including unistd.h.
5536 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5537 in the smtp transport. When a block could not be written in a single
5538 write() function, the timeout was being re-applied to each part-write.
5539 This seems wrong - if the receiver was accepting one byte at a time it
5540 would take for ever. The timeout is now adjusted when this happens. It
5541 doesn't have to be particularly precise.
5543 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5544 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5546 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5547 without a domain if the check to <postmaster@domain> fails.
5549 SC/01 Eximstats: added -xls and the ability to specify output files
5550 (patch written by Frank Heydlauf).
5552 SC/02 Eximstats: use FileHandles for outputting results.
5554 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5556 SC/04 Eximstats: fixed display of large numbers with -nvr option
5558 SC/05 Eximstats: fixed merging of reports with empty tables.
5560 SC/06 Eximstats: added the -include_original_destination flag
5562 SC/07 Eximstats: removed tabs and trailing whitespace.
5564 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5566 TK/06 MBOX spool code: Add real "From " MBOX separator line
5567 so the .eml file is really in mbox format (even though
5568 most programs do not really care). Patch from Alex Miller.
5570 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5571 The latter is generated from $received_to and is only set if the
5572 message has one envelope recipient. SA can use these headers,
5573 obviously out-of-the-box. Patch from Alex Miller.
5575 PH/08 The ${def test on a variable was returning false if the variable's
5576 value was "0", contrary to what the specification has always said!
5577 The result should be true unless the variable is empty.
5579 PH/09 The syntax error of a character other than { following "${if
5580 def:variable_name" (after optional whitespace) was not being diagnosed.
5581 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5582 accidental colon was present, for example, could give incorrect results.
5584 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5585 result is used (not including appendfile, where other changes are about
5588 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5589 This involved changing a lot of size variables from int to off_t. It
5590 should work with maildirs and everything.
5592 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5593 spamd dying while we are connected to it.
5595 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5598 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5599 function for BDB 4.3.
5601 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5603 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5604 the sources for PCRE have been re-arranged and more files are now
5607 PH/15 The code I had for printing potentially long long variables in PH/11
5608 above was not the best (it lost precision). The length of off_t variables
5609 is now inspected at build time, and an appropriate printing format (%ld
5610 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5611 to be "long long int" or "long int". This is needed for the internal
5612 formatting function string_vformat().
5614 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5615 the configuration file to be ":syslog", then the script "guesses" where
5616 the logs files are, rather than using the compiled in default. In our
5617 case the guess is not the same as the compiled default, so the script
5618 suddenly stopped working when I started to use syslog. The patch checks
5619 to see if log_file_path is "". If so, it attempts to read it from exim
5620 with no configuration file to get the compiled in version, before it
5621 falls back to the previous guessing code."
5623 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5624 implementing BATV in an Exim configuration. See NewStuff for the gory
5627 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5628 Makefile that are specific to HP-UX.
5630 PH/18 If the "use_postmaster" option was set for a recipient callout together
5631 with the "random" option, the postmaster address was used as the MAIL
5632 FROM address for the random test, but not for the subsequent recipient
5633 test. It is now used for both.
5635 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5636 patch removes a few documentation additions to RFC 3028, because the
5637 latest draft now contains them. It adds the new en;ascii-case comparator
5638 and a new error check for 8bit text in MIME parts. Comparator and
5639 require names are now matched exactly. I enabled the subaddress
5640 extension, but it is not well tested yet (read: it works for me)."
5642 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5643 rework some of the code of TK/09 above to avoid the hardwired use of
5644 "%lld" and "long long". Replaced the call to snprintf() with a call to
5647 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5648 records point to non-existent hosts", "retry timeout exceeded", and
5649 "retry time not reached for any host after a long failure period".
5651 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5652 experimental DomainKeys support:
5654 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5655 (2) On an error such as an illegally used "control", the wrong name for
5656 the control was given.
5658 These problems did NOT occur unless DomainKeys support was compiled.
5660 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5662 PH/24 Added ${if match_ip condition.
5664 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5665 databases so that it will be absolutely obvious if a crash occurs in the
5666 DB library. This is a regular occurrence (often caused by mis-matched
5669 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5670 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5671 picked up on a user's system that detects such things. There doesn't seem
5672 to be a gcc warning option for this - only an attribute that has to be
5673 put on the function's prototype. It seems that in Fedora Core 4 they have
5674 set this on a number of new functions. No doubt there will be more in due
5677 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5678 specify a transport. However, if an address that was verified by such a
5679 router was the subject of a callout, Exim crashed because it tried to
5680 read the rcpt_include_affixes from the non-existent transport. Now it
5681 just assumes that the setting of that option is false. This bug was
5682 introduced by 4.51/PH/31.
5684 PH/28 Changed -d+all to exclude +memory, because that information is very
5685 rarely of interest, but it makes the output a lot bigger. People tend to
5686 do -d+all out of habit.
5688 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5689 code in os-type was giving problems when libc.so lives in lib64, like on
5692 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5693 aren't the modern standard, and it seems that some systems' include files
5694 don't always have them. Exim was already checking for some of the newer
5695 ones like T_AAAA, and defining it itself. I've added checks for all the
5696 record types that Exim uses.
5698 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5699 not automatically generating a new one, as it is supposed to. This
5700 prevented TLS from working. If the file did exist, but contained invalid
5701 data, a new version was generated, as expected. It was only the case of a
5702 non-existent file that was broken.
5704 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5705 with a change in libdomainkeys > 0.64.
5707 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5708 from DNS. If the selector record carries the flag, it now has
5709 precedence over the domain-wide flag.
5711 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5713 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5714 the use of a port name that isn't defined in /etc/services) occurred, the
5715 message was deferred as in a normal delivery, and thus remained on the
5716 spool, instead of being failed because of the mua_wrapper setting. This
5717 is now fixed, and I tidied up some of the mua_wrapper messages at the
5720 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5721 the messages in a hash of arrays rather than using individual hashes.
5722 This is a bit cleaner and results in dramatic memory savings, albeit
5723 at a slight CPU cost.
5725 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5726 as requested by Marc Sherman.
5728 SC/10 Eximstats: added histograms for user specified patterns as requested
5731 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5733 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5734 fopen() in the content-scanning modules that did not already have it.
5740 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5741 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5743 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5745 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5747 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5748 to test Sieve filters that use "vacation".
5750 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5751 that changes the way the GnuTLS parameters are stored in the cache file.
5752 The new format can be generated externally. For backward compatibility,
5753 if the data in the cache doesn't make sense, Exim assumes it has read an
5754 old-format file, and it generates new data and writes a new file. This
5755 means that you can't go back to an older release without removing the
5758 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5759 work if there are any delivery delays because "one_time" forces the
5760 parent to be marked "delivered", so its unseen clone is never tried
5761 again. For this reason, Exim now forbids the simultaneous setting of
5764 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5765 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5766 entry if you want to know the details. The fix, however, neglected to
5767 consider the case when local delivery batching is involved. The test for
5768 "previously delivered" was not happening when checking to see if an
5769 address could be batched with a previous (undelivered) one; under
5770 certain circumstances this could lead to multiple deliveries to the same
5773 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5774 in its include files, and this causes problems building Exim.
5776 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5777 header_syntax) but Exim was just ignoring anything given after a slash.
5778 In particular, this caused confusion with an attempt to use "verify =
5779 reverse_host_lookup/defer_ok". An error is now given when options are
5780 supplied for verify items that do not have them. (Maybe reverse_host_
5781 lookup should have a defer_ok option, but that's a different point.)
5783 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5784 defined by RFC 821) to 2048, because there were problems with some AUTH
5785 commands, and RFC 1869 says the size should be increased for extended
5786 SMTP commands that take arguments.
5788 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5791 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5792 "unknown" error; now it says that the functionality isn't in the binary.
5794 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5795 an address' error message when a string expansion fails (syntax or
5796 whatever). Otherwise the password may appear in the log. Following change
5797 PH/42 below, there is no longer a chance of it appearing in a bounce
5800 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5802 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5803 of its addresses was ever tried. (Bugzilla bug #2.)
5805 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5806 the result incorrectly in the debug output. (It correctly added a newline
5807 to what was transported.)
5809 TF/01 Added $received_time.
5811 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5812 commented out examples of how to interface to a virus scanner and to
5813 SpamAssassin. Also added commented examples of av_scanner and
5814 spamd_address settings.
5816 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5817 and controls are allowed in which ACLs. There were a couple of minor
5818 errors. Some of the entries in the conditions table (which is a table of
5819 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5820 negation of where the condition IS allowed.
5822 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5824 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5825 header file does not have a version number, so I've had to invent a new
5826 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5827 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5828 radiusclient), but it was contributed by a Radius user.
5830 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5831 files or directories, for OpenSSL.
5833 PH/19 When an Exim process that is running as root has to create an Exim log
5834 file, it does so in a subprocess that runs as exim:exim so as to get the
5835 ownership right at creation (otherwise, other Exim processes might see
5836 the file with the wrong ownership). There was no test for failure of this
5837 fork() call, which would lead to the process getting stuck as it waited
5838 for a non-existent subprocess. Forks do occasionally fail when resources
5839 run out. I reviewed all the other calls to fork(); they all seem to check
5842 PH/20 When checking for unexpected SMTP input at connect time (before writing
5843 the banner), Exim was not dealing correctly with a non-positive return
5844 from the read() function. If the client had disconnected by this time,
5845 the result was a log entry for a synchronization error with an empty
5846 string after "input=" when read() returned zero. If read() returned -1
5847 (an event I could not check), uninitialized data bytes were printed.
5848 There were reports of junk text (parts of files, etc) appearing after
5851 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5853 PH/22 Added support for macro redefinition, and (re)definition in between
5854 driver and ACL definitions.
5856 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5857 forgetting to use the resulting value; it was using the unexpanded value.
5859 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5860 hadn't been configured. The fix is from Juergen Kreileder, who
5861 understands it better than I do:
5863 "Here's what I see happening with three configured cyrus_sasl
5864 authenticators configured (plain, login, cram-md5):
5866 On startup auth_cyrus_sasl_init() gets called for each of these.
5867 This means three calls to sasl_listmech() without a specified mech_list.
5868 => SASL tests which mechs of all available mechs actually work
5869 => three warnings about OTP not working
5870 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5872 With the patch, sasl_listmech() also gets called three times. But now
5873 SASL's mech_list option is set to the server_mech specified in the the
5874 authenticator. Or in other words, the answer from sasl_listmech()
5875 gets limited to just the mech you're testing for (which is different
5877 => the return list contains just 'plain' or 'login', 'cram-md5' or
5878 nothing depending on the value of ob->server_mech.
5880 I've just tested the patch: Authentication still works fine,
5881 unavailable mechs specified in the exim configuration are still
5882 caught, and the auth.log warnings about OTP are gone."
5884 PH/25 When debugging is enabled, the contents of the command line are added
5885 to the debugging output, even when log_selector=+arguments is not
5888 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5889 answer is "GNU", and only if the return is "GNU/something" is the answer
5892 PH/27 $acl_verify_message is now set immediately after the failure of a
5893 verification in an ACL, and so is available in subsequent modifiers. In
5894 particular, the message can be preserved by coding like this:
5896 warn !verify = sender
5897 set acl_m0 = $acl_verify_message
5899 Previously, $acl_verify_message was set only while expanding "message"
5900 and "log_message" when a very denied access.
5902 PH/28 Modified OS/os.c-Linux with
5904 -#ifndef OS_LOAD_AVERAGE
5905 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5907 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5908 nomenclature these days.)
5910 PH/29 Installed patch from the Sieve maintainer that adds the options
5911 sieve_useraddress and sieve_subaddress to the redirect router.
5913 PH/30 In these circumstances:
5914 . Two addresses routed to the same list of hosts;
5915 . First host does not offer TLS;
5916 . First host accepts first address;
5917 . First host gives temporary error to second address;
5918 . Second host offers TLS and a TLS session is established;
5919 . Second host accepts second address.
5920 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5921 and peerdn, if requested) that were in fact used only for the second
5924 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5925 attention to any local part prefix or suffix that was matched by the
5926 router that accepted the address. It now behaves in the same way as it
5927 does for delivery: the affixes are removed from the local part unless
5928 rcpt_include_affixes is set on the transport.
5930 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5931 timeout during the DATA phase of an incoming message.
5933 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5934 applied a patch sanctioned by the Sieve maintainer.
5936 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5937 the uid or gid is negative. A case of a negative gid caused this to be
5938 noticed. The fix allows for either to be negative.
5940 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5941 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5944 PH/36 The change PH/12 above was broken. Fixed it.
5946 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5947 the grounds that routing the same address twice would always produce the
5948 same answer. This might have been true once, but it is certainly no
5949 longer true now. Routing a child address may depend on the previous
5950 routing that produced that child. Some complicated redirection strategies
5951 went wrong when messages had multiple recipients, and made Exim's
5952 behaviour dependent on the order in which the addresses were given.
5954 I have moved the duplicate checking until after the routing is complete.
5955 Exim scans the addresses that are assigned to local and remote
5956 transports, and removes any duplicates. This means that more work will be
5957 done, as duplicates will always all be routed, but duplicates are
5958 presumably rare, so I don't expect this is of any significance.
5960 For deliveries to pipes, files, and autoreplies, the duplicate checking
5961 still happens during the routing process, since they are not going to be
5964 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5965 It corrects a timeout issue with spamd. This is Ian's comment: "The
5966 background is that sometimes spamd either never reads data from a
5967 connection it has accepted, or it never writes response data. The exiscan
5968 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5969 blindly assumes that writes won't block so it may never time out."
5971 PH/39 Allow G after quota size as well as K and M.
5973 PH/40 The value set for $authenticated_id in an authenticator may not contain
5974 binary zeroes or newlines because the value is written to log lines and
5975 to spool files. There was no check on this. Now the value is run through
5976 the string_printing() function so that such characters are converted to
5977 printable escape sequences.
5979 PH/41 $message_linecount is a new variable that contains the total number of
5980 lines in the message. Compare $body_linecount, which is the count for the
5983 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5984 bounce and delay warning messages, except in certain special cases, which
5987 (a) An SMTP error message from a remote host;
5988 (b) A message specified in a :fail: redirection;
5989 (c) A message specified in a "fail" command in a system filter;
5990 (d) A message specified in a FAIL return from the queryprogram router;
5991 (e) A message specified by the cannot_route_message router option.
5993 In these cases only, Exim does include the error details in bounce and
5994 warning messages. There are also a few cases where bland messages such
5995 as "unrouteable address" or "local delivery error" are given.
5997 PH/43 $value is now also set for the "else" part of a ${run expansion.
5999 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
6000 being worked on, but at least Exim now implements the latest version to
6003 PH/45 In a pipe transport, although a timeout while waiting for the pipe
6004 process to complete was treated as a delivery failure, a timeout while
6005 writing the message to the pipe was logged, but erroneously treated as a
6006 successful delivery. Such timeouts include transport filter timeouts. For
6007 consistency with the overall process timeout, these timeouts are now
6008 treated as errors, giving rise to delivery failures by default. However,
6009 there is now a new Boolean option for the pipe transport called
6010 timeout_defer, which, if set TRUE, converts the failures into defers for
6011 both kinds of timeout. A transport filter timeout is now identified in
6014 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
6015 systems where "make" and "gmake" are different, calling "gmake" at top
6016 level broke things. I've arranged for the value of $(MAKE) to be passed
6017 from the Makefile to this script so that it can call the same version of
6021 A note about Exim versions 4.44 and 4.50
6022 ----------------------------------------
6024 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
6025 changes of various kinds. As a consequence, a big documentation update was
6026 needed. This delayed the release for rather longer than seemed good, especially
6027 in the light of a couple of (minor) security issues. Therefore, the changes
6028 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
6029 release. So 4.44 and 4.50 are in effect two different branches that both start
6032 I have left the 4.50 change log unchanged; it contains all the changes since
6033 4.43. The change log for 4.44 is below; many of its items are identical to
6034 those for 4.50. This seems to be the most sensible way to preserve the
6035 historical information.
6041 1. Minor wording change to the doc/README.SIEVE file.
6043 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6044 computation of the current number of files was incorrect.
6046 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6047 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6050 4. Give more explanation in the error message when the command for a transport
6051 filter fails to execute.
6053 5. There are several places where Exim runs a non-Exim command in a
6054 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6055 was being done only for the command run by the queryprogram router. It is
6056 now done for all such subprocesses. The other cases are: ${run, transport
6057 filters, and the commands run by the lmtp and pipe transports.
6059 6. Added CONFIGURE_GROUP build-time option.
6061 7. Some older OS have a limit of 256 on the maximum number of file
6062 descriptors. Exim was using setrlimit() to set 1000 as a large value
6063 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6064 systems. I've change it so that if it can't get 1000, it tries for 256.
6066 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6067 was an oversight, and furthermore, ever since the addition of extra
6068 controls (e.g. 4.43/32), the checks on when to allow different forms of
6069 "control" were broken. There should now be diagnostics for all cases when a
6070 control that does not make sense is encountered.
6072 9. Added the /retain_sender option to "control=submission".
6074 10. $recipients is now available in the predata ACL (oversight).
6076 11. Tidy the search cache before the fork to do a delivery from a message
6077 received from the command line. Otherwise the child will trigger a lookup
6078 failure and thereby defer the delivery if it tries to use (for example) a
6079 cached ldap connection that the parent has called unbind on.
6081 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6082 of $address_data from the recipient verification was clobbered by the
6083 sender verification.
6085 13. The value of address_data from a sender verification is now available in
6086 $sender_address_data in subsequent conditions in the ACL statement.
6088 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6090 15. Added a new option "connect=<time>" to callout options, to set a different
6093 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6094 was its contents. (It was OK if the option was not defined at all.)
6096 17. A "Completed" log line is now written for messages that are removed from
6097 the spool by the -Mrm option.
6099 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6100 information about exactly what failed.
6102 19. Added -dd to debug only the daemon process.
6104 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6105 handles timeouts, both on the server side and network timeouts. Renamed the
6106 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6108 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6109 It is now set to "smtps".
6111 22. $host_address is now set to the target address during the checking of
6112 ignore_target_hosts.
6114 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6115 being passed; this would have caused $sender_host_name to have been used if
6116 matching the list had actually called for a host name (not very likely,
6117 since this list is usually IP addresses). A host name is now passed as
6120 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6121 code that specifies a non-restarting handler (typically sigaction() in
6122 modern systems) in an attempt to fix a rare and obscure crash bug.
6124 25. Narrowed the window for a race in the daemon that could cause it to ignore
6125 SIGCHLD signals. This is not a major problem, because they are used only to
6126 wake it up if nothing else does.
6128 26. A malformed maildirsize file could cause Exim to calculate negative values
6129 for the mailbox size or file count. Odd effects could occur as a result.
6130 The maildirsize information is now recalculated if the size or filecount
6133 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6134 support for a long time. Removed HAVE_SYS_VFS_H.
6136 28. Installed the latest version of exipick from John Jetmore.
6138 29. In an address list, if the pattern was not a regular expression, an empty
6139 subject address (from a bounce message) matched only if the pattern was an
6140 empty string. Non-empty patterns were not even tested. This was the wrong
6141 because it is perfectly reasonable to use an empty address as part of a
6142 database query. An empty address is now tested by patterns that are
6143 lookups. However, all the other forms of pattern expect the subject to
6144 contain a local part and a domain, and therefore, for them, an empty
6145 address still always fails if the pattern is not itself empty.
6147 30. Exim went into a mad DNS loop when attempting to do a callout where the
6148 host was specified on an smtp transport, and looking it up yielded more
6149 than one IP address.
6151 31. Re-factored the code for checking spool and log partition space into a
6152 function that finds that data and another that does the check. The former
6153 is then used to implement four new variables: $spool_space, $log_space,
6154 $spool_inodes, and $log_inodes.
6156 32. The RFC2047 encoding function was originally intended for short strings
6157 such as real names; it was not keeping to the 75-character limit for
6158 encoded words that the RFC imposes. It now respects the limit, and
6159 generates multiple encoded words if necessary. To be on the safe side, I
6160 have increased the buffer size for the ${rfc2047: expansion operator from
6163 33. It is now permitted to omit both strings after an "if" condition; if the
6164 condition is true, the result is "true". As before, when the second string
6165 is omitted, a false condition yields an empty string. This makes it less
6166 cumbersome to write custom ACL and router conditions.
6168 34. Failure to deliver a bounce message always caused it to be frozen, even if
6169 there was an errors_to setting on the router. The errors_to setting is now
6172 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6173 canonical form (fully expanded) before being placed in
6174 $sender_host_address.
6176 36. The table in the code that translates DNS record types into text (T_A to
6177 "A" for instance) was missing entries for NS and CNAME. It is just possible
6178 that this could have caused confusion if both these types were looked up
6179 for the same domain, because the text type is used as part of Exim's
6180 per-process caching. But the chance of anyone hitting this buglet seems
6183 37. The dnsdb lookup has been extended in a number of ways.
6185 (1) There is a new type, "zns", which walks up the domain tree until it
6186 finds some nameserver records. It should be used with care.
6188 (2) There is a new type, "mxh", which is like "mx" except that it returns
6189 just the host names, not the priorities.
6191 (3) It is now possible to give a list of domains (or IP addresses) to be
6192 looked up. The behaviour when one of the lookups defers can be
6193 controlled by a keyword.
6195 (4) It is now possible to specify the separator character for use when
6196 multiple records are returned.
6198 38. The dnslists ACL condition has been extended: it is now possible to supply
6199 a list of IP addresses and/or domains to be looked up in a particular DNS
6202 39. Added log_selector=+queue_time_overall.
6204 40. When running the queue in the test harness, wait just a tad after forking a
6205 delivery process, to get repeatability of debugging output.
6207 41. Include certificate and key file names in error message when GnuTLS fails
6208 to set them up, because the GnuTLS error message doesn't include the name
6209 of the failing file when there is a problem reading it.
6211 42. Allow both -bf and -bF in the same test run.
6213 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6215 44. The "Exiscan patch" is now merged into the mainline Exim source.
6217 45. Sometimes the final signoff response after QUIT could fail to get
6218 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6219 < 0 before doing a fflush(). This bug looks as though it goes back to the
6220 introduction of TLS in release 3.20, but "sometimes" must have been rare
6221 because the tests only now provoked it.
6223 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6224 (this can affect the format of dates).
6226 47. exim_tidydb, when checking for the continued existence of a message for
6227 which it has found a message-specific retry record, was not finding
6228 messages that were in split spool directories. Consequently, it was
6229 deleting retry records that should have stayed in existence.
6231 48. Steve fixed some bugs in eximstats.
6233 49. The SPA authentication driver was not abandoning authentication and moving
6234 on to the next authenticator when an expansion was forced to fail,
6235 contradicting the general specification for all authenticators. Instead it
6236 was generating a temporary error. It now behaves as specified.
6238 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6239 (the order specifies the preference for clients). The order is now AES256,
6240 AES128, 3DES, ARCFOUR128.
6242 51. Small patch to Sieve code - explicitly set From: when generating an
6245 52. Exim crashed if a remote delivery caused a very long error message to be
6246 recorded - for instance if somebody sent an entire SpamAssassin report back
6247 as a large number of 550 error lines. This bug was coincidentally fixed by
6248 increasing the size of one of Exim's internal buffers (big_buffer) that
6249 happened as part of the Exiscan merge. However, to be on the safe side, I
6250 have made the code more robust (and fixed the comments that describe what
6253 53. Now that there can be additional text after "Completed" in log lines (if
6254 the queue_time_overall log selector is set), a one-byte patch to exigrep
6255 was needed to allow it to recognize "Completed" as not the last thing in
6258 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6259 patch that reportedly fixes this has been added. I am not expert enough to
6260 create a test for it. This is what the patch creator wrote:
6262 "I found a little strange behaviour of ldap code when working with
6263 Windows 2003 AD Domain, where users was placed in more than one
6264 Organization Units. When I tried to give exim partial DN, the exit code
6265 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6266 But simultaneously result of request was absolutely normal ldap result,
6267 so I produce this patch..."
6269 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6270 REFERENCE, so I have modified the code to exclude the patch when that macro
6273 55. Some experimental protocols are using DNS PTR records for new purposes. The
6274 keys for these records are domain names, not reversed IP addresses. The
6275 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6276 leaves it alone. Component reversal etc. now happens only for IP addresses.
6279 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6281 57. Double the size of the debug message buffer (to 2048) so that more of very
6282 long debug lines gets shown.
6284 58. The exicyclog utility now does better if the number of log files to keep
6285 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6287 59. Two changes related to the smtp_active_hostname option:
6289 (1) $smtp_active_hostname is now available as a variable.
6290 (2) The default for smtp_banner uses $smtp_active_hostname instead
6291 of $primary_hostname.
6293 60. The host_aton() function is supposed to be passed a string that is known
6294 to be a valid IP address. However, in the case of IPv6 addresses, it was
6295 not checking this. This is a hostage to fortune. Exim now panics and dies
6296 if the condition is not met. A case was found where this could be provoked
6297 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6298 components; fortuitously, this particular loophole had already been fixed
6299 by change 4.50/55 above.
6301 If there are any other similar loopholes, the new check in host_aton()
6302 itself should stop them being exploited. The report I received stated that
6303 data on the command line could provoke the exploit when Exim was running as
6304 exim, but did not say which command line option was involved. All I could
6305 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6306 running as the user.
6309 61. There was a buffer overflow vulnerability in the SPA authentication code
6310 (which came originally from the Samba project). I have added a test to the
6311 spa_base64_to_bits() function which I hope fixes it.
6314 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6315 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6317 63. The daemon start-up calls getloadavg() while still root for those OS that
6318 need the first call to be done as root, but it missed one case: when
6319 deliver_queue_load_max is set with deliver_drop_privilege. This is
6320 necessary for the benefit of the queue runner, because there is no re-exec
6321 when deliver_drop_privilege is set.
6323 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6324 This has been fixed.
6326 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6327 was in use, was not putting the data itself into the right store pool;
6328 consequently, it could be overwritten for a subsequent message in the same
6329 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6332 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6334 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6335 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6336 the function were treating the return as a boolean value, which happened to
6337 work because 0=false and not-0=true, but is not correct code.
6339 68. The host_aton() function was not handling scoped IPv6 addresses (those
6340 with, for example, "%eth0" on the end) correctly.
6342 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6343 negated items (that is, ~something) in unsigned ints. Some compilers
6344 apparently mutter when there is no cast.
6346 70. If an address verification called from an ACL failed, and did not produce a
6347 user-specific message (i.e. there was only a "system" message), nothing was
6348 put in $acl_verify_message. In this situation, it now puts the system
6351 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6352 session; change 4.31/43 added the unwanted input to the log line - except
6353 that it did not do this in the start of session case. It now does.
6355 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6356 This is wrong and can cause the other end to generate a synchronization
6357 error if it is another Exim or anything else that does the synchronization
6358 check. A QUIT command is no longer sent after a timeout.
6360 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6361 during host lookups.
6363 74. The defer_ok option of callout verification was not working if it was used
6364 when verifying addresses in header lines, that is, for this case:
6366 verify = header_sender/callout=defer_ok
6368 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6369 those file descriptors could be used for SMTP connections. If anything
6370 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6371 could be sent to the SMTP client, causing chaos. The daemon now opens
6372 stdin, stdout, and stderr to /dev/null when it puts itself into the
6375 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6376 log by default. The user can override this with suitable Perl magic.
6378 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6379 the log message when discard triggers, was not working for the DATA ACL or
6380 for the non-SMTP ACL.
6382 78. Error message wording change in sieve.c.
6384 79. If smtp_accept_max_per_host was set, the number of connections could be
6385 restricted to fewer than expected, because the daemon was trying to set up
6386 a new connection before checking whether the processes handling previous
6387 connections had finished. The check for completed processes is now done
6388 earlier. On busy systems, this bug wouldn't be noticed because something
6389 else would have woken the daemon, and it would have reaped the completed
6392 80. If a message was submitted locally by a user whose login name contained one
6393 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6394 It caused a spool format error. I have fixed the spool reading code. A
6395 related problem was that the "from" clause in the Received: line became
6396 illegal because of the space(s). It is now covered by ${quote_local_part.
6398 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6401 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6403 83. Patch from Sieve maintainer to fix unterminated string problem in
6404 "vacation" handling.
6406 84. Some minor changes to the Linux configuration files to help with other
6407 OS variants using glibc.
6409 85. One more patch for Sieve to update vacation handling to latest spec.
6412 ----------------------------------------------------
6413 See the note above about the 4.44 and 4.50 releases.
6414 ----------------------------------------------------
6420 1. Change 4.43/35 introduced a bug that caused file counts to be
6421 incorrectly computed when quota_filecount was set in an appendfile
6424 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6425 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6428 3. Give more explanation in the error message when the command for a transport
6429 filter fails to execute.
6431 4. There are several places where Exim runs a non-Exim command in a
6432 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6433 was being done only for the command run by the queryprogram router. It is
6434 now done for all such subprocesses. The other cases are: ${run, transport
6435 filters, and the commands run by the lmtp and pipe transports.
6437 5. Some older OS have a limit of 256 on the maximum number of file
6438 descriptors. Exim was using setrlimit() to set 1000 as a large value
6439 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6440 systems. I've change it so that if it can't get 1000, it tries for 256.
6442 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6443 was an oversight, and furthermore, ever since the addition of extra
6444 controls (e.g. 4.43/32), the checks on when to allow different forms of
6445 "control" were broken. There should now be diagnostics for all cases when a
6446 control that does not make sense is encountered.
6448 7. $recipients is now available in the predata ACL (oversight).
6450 8. Tidy the search cache before the fork to do a delivery from a message
6451 received from the command line. Otherwise the child will trigger a lookup
6452 failure and thereby defer the delivery if it tries to use (for example) a
6453 cached ldap connection that the parent has called unbind on.
6455 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6456 of $address_data from the recipient verification was clobbered by the
6457 sender verification.
6459 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6460 was its contents. (It was OK if the option was not defined at all.)
6462 11. A "Completed" log line is now written for messages that are removed from
6463 the spool by the -Mrm option.
6465 12. $host_address is now set to the target address during the checking of
6466 ignore_target_hosts.
6468 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6469 being passed; this would have caused $sender_host_name to have been used if
6470 matching the list had actually called for a host name (not very likely,
6471 since this list is usually IP addresses). A host name is now passed as
6474 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6475 code that specifies a non-restarting handler (typically sigaction() in
6476 modern systems) in an attempt to fix a rare and obscure crash bug.
6478 15. Narrowed the window for a race in the daemon that could cause it to ignore
6479 SIGCHLD signals. This is not a major problem, because they are used only to
6480 wake it up if nothing else does.
6482 16. A malformed maildirsize file could cause Exim to calculate negative values
6483 for the mailbox size or file count. Odd effects could occur as a result.
6484 The maildirsize information is now recalculated if the size or filecount
6487 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6488 support for a long time. Removed HAVE_SYS_VFS_H.
6490 18. Updated exipick to current release from John Jetmore.
6492 19. Allow an empty sender to be matched against a lookup in an address list.
6493 Previously the only cases considered were a regular expression, or an
6496 20. Exim went into a mad DNS lookup loop when doing a callout where the
6497 host was specified on the transport, if the DNS lookup yielded more than
6500 21. The RFC2047 encoding function was originally intended for short strings
6501 such as real names; it was not keeping to the 75-character limit for
6502 encoded words that the RFC imposes. It now respects the limit, and
6503 generates multiple encoded words if necessary. To be on the safe side, I
6504 have increased the buffer size for the ${rfc2047: expansion operator from
6507 22. Failure to deliver a bounce message always caused it to be frozen, even if
6508 there was an errors_to setting on the router. The errors_to setting is now
6511 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6512 canonical form (fully expanded) before being placed in
6513 $sender_host_address.
6515 24. Updated eximstats to version 1.33
6517 25. Include certificate and key file names in error message when GnuTLS fails
6518 to set them up, because the GnuTLS error message doesn't include the name
6519 of the failing file when there is a problem reading it.
6521 26. Expand error message when OpenSSL has problems setting up cert/key files.
6524 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6525 (this can affect the format of dates).
6527 28. exim_tidydb, when checking for the continued existence of a message for
6528 which it has found a message-specific retry record, was not finding
6529 messages that were in split spool directories. Consequently, it was
6530 deleting retry records that should have stayed in existence.
6532 29. eximstats updated to version 1.35
6533 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6534 1.35 - bugfix such that pie charts by volume are generated correctly
6536 30. The SPA authentication driver was not abandoning authentication and moving
6537 on to the next authenticator when an expansion was forced to fail,
6538 contradicting the general specification for all authenticators. Instead it
6539 was generating a temporary error. It now behaves as specified.
6541 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6542 (the order specifies the preference for clients). The order is now AES256,
6543 AES128, 3DES, ARCFOUR128.
6545 31. Small patch to Sieve code - explicitly set From: when generating an
6548 32. Exim crashed if a remote delivery caused a very long error message to be
6549 recorded - for instance if somebody sent an entire SpamAssassin report back
6550 as a large number of 550 error lines. This bug was coincidentally fixed by
6551 increasing the size of one of Exim's internal buffers (big_buffer) that
6552 happened as part of the Exiscan merge. However, to be on the safe side, I
6553 have made the code more robust (and fixed the comments that describe what
6556 33. Some experimental protocols are using DNS PTR records for new purposes. The
6557 keys for these records are domain names, not reversed IP addresses. The
6558 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6559 leaves it alone. Component reversal etc. now happens only for IP addresses.
6562 34. The host_aton() function is supposed to be passed a string that is known
6563 to be a valid IP address. However, in the case of IPv6 addresses, it was
6564 not checking this. This is a hostage to fortune. Exim now panics and dies
6565 if the condition is not met. A case was found where this could be provoked
6566 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6567 components; fortuitously, this particular loophole had already been fixed
6568 by change 4.50/55 or 4.44/33 above.
6570 If there are any other similar loopholes, the new check in host_aton()
6571 itself should stop them being exploited. The report I received stated that
6572 data on the command line could provoke the exploit when Exim was running as
6573 exim, but did not say which command line option was involved. All I could
6574 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6575 running as the user.
6578 35. There was a buffer overflow vulnerability in the SPA authentication code
6579 (which came originally from the Samba project). I have added a test to the
6580 spa_base64_to_bits() function which I hope fixes it.
6583 36. The daemon start-up calls getloadavg() while still root for those OS that
6584 need the first call to be done as root, but it missed one case: when
6585 deliver_queue_load_max is set with deliver_drop_privilege. This is
6586 necessary for the benefit of the queue runner, because there is no re-exec
6587 when deliver_drop_privilege is set.
6589 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6590 was in use, was not putting the data itself into the right store pool;
6591 consequently, it could be overwritten for a subsequent message in the same
6592 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6595 38. Sometimes the final signoff response after QUIT could fail to get
6596 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6597 < 0 before doing a fflush(). This bug looks as though it goes back to the
6598 introduction of TLS in release 3.20, but "sometimes" must have been rare
6599 because the tests only now provoked it.
6605 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6606 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6607 Now it returns an integer. A number of calls were still expecting a T/F
6608 return. Fortuitously, in all cases, the tests worked in OK situations,
6609 which is the norm. However, things would have gone wrong on any write
6610 failures on the smtp file descriptor. This function is used when sending
6611 messages over SMTP and also when doing verify callouts.
6613 2. When Exim is called to do synchronous delivery of a locally submitted
6614 message (the -odf or -odi options), it no longer closes stderr before doing
6617 3. Implemented the mua_wrapper option.
6619 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6621 5. Implemented the functions header_remove(), header_testname(),
6622 header_add_at_position(), and receive_remove_recipient(), and exported them
6625 6. If an ACL "warn" statement specified the addition of headers, Exim already
6626 inserted X-ACL-Warn: at the start if there was no header name. However, it
6627 was not making this test for the second and subsequent header lines if
6628 there were newlines in the string. This meant that an invalid header could
6629 be inserted if Exim was badly configured.
6631 7. Allow an ACL "warn" statement to add header lines at the start or after all
6632 the Received: headers, as well as at the end.
6634 8. Added the rcpt_4xx retry error code.
6636 9. Added postmaster_mailfrom=xxx to callout verification option.
6638 10. Added mailfrom=xxxx to the callout verification option, for verify=
6641 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6642 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6644 12. Inserted some casts to stop certain compilers warning when using pointer
6645 differences as field lengths or precisions in printf-type calls (mostly
6646 affecting debugging statements).
6648 13. Added optional readline() support for -be (dynamically loaded).
6650 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6651 same clock tick as a message's arrival, so that its received time was the
6652 same as the "first fail" time on the retry record, and that message
6653 remained on the queue past the ultimate address timeout, every queue runner
6654 would try a delivery (because it was past the ultimate address timeout) but
6655 after another failure, the ultimate address timeout, which should have then
6656 bounced the address, did not kick in. This was a "< instead of <=" error;
6657 in most cases the first failure would have been in the next clock tick
6658 after the received time, and all would be well.
6660 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6661 being recognized when the domain list was tested by the match_domain
6662 condition in an expansion string.
6664 16. Added the ${str2b64: operator.
6666 17. Exim was always calling setrlimit() to set a large limit for the number of
6667 processes, without checking whether the existing limit was already
6668 adequate. (It did check for the limit on file descriptors.) Furthermore,
6669 errors from getrlimit() and setrlimit() were being ignored. Now they are
6670 logged to the main and panic logs, but Exim does carry on, to try to do its
6671 job under whatever limits there are.
6673 18. Imported PCRE 5.0.
6675 19. Trivial typo in log message " temporarily refused connection" (the leading
6678 20. If the log selector return_path_on_delivery was set and an address was
6679 redirected to /dev/null, the delivery process crashed because it assumed
6680 that a return path would always be set for a "successful" delivery. In this
6681 case, the whole delivery is bypassed as an optimization, and therefore no
6684 21. Internal re-arrangement: the function for sending a challenge and reading
6685 a response while authentication was assuming a zero-terminated challenge
6686 string. It's now changed to take a pointer and a length, to allow for
6687 binary data in such strings.
6689 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6691 23. Exim was not respecting finduser_retries when seeking the login of the
6692 uid under which it was called; it was always trying 10 times. (The default
6693 setting of finduser_retries is zero.) Also, it was sleeping after the final
6694 failure, which is pointless.
6696 24. Implemented tls_on_connect_ports.
6698 25. Implemented acl_smtp_predata.
6700 26. If the domain in control=submission is set empty, Exim assumes that the
6701 authenticated id is a complete email address when it generates From: or
6702 Sender: header lines.
6704 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6705 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6706 chown and chgrp in /bin and hostname in /usr/bin.
6708 28. Exim was keeping the "process log" file open after each use, just as it
6709 does for the main log. This opens the possibility of it remaining open for
6710 long periods when the USR1 signal hits a daemon. Occasional processlog
6711 errors were reported, that could have been caused by this. Anyway, it seems
6712 much more sensible not to leave this file open at all, so that is what now
6715 29. The long-running daemon process does not normally write to the log once it
6716 has entered its main loop, and it closes the log before doing so. This is
6717 so that log files can straightforwardly be renamed and moved. However,
6718 there are a couple of unusual error situations where the daemon does write
6719 log entries, and I had neglected to close the log afterwards.
6721 30. The text of an SMTP error response that was received during a remote
6722 delivery was being truncated at 512 bytes. This is too short for some of
6723 the long messages that one sometimes sees. I've increased the limit to
6726 31. It is now possible to make retry rules that apply only when a message has a
6727 specific sender, in particular, an empty sender.
6729 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6730 it possible to be selective about when SMTP synchronization is enforced.
6732 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6734 32. Implemented hosts_connection_nolog.
6736 33. Added an ACL for QUIT.
6738 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6741 35. Added mailbox_size and mailbox_filecount to appendfile.
6743 36. Added control = no_multiline_responses to ACLs.
6745 37. There was a bug in the logic of the code that waits for the clock to tick
6746 in the case where the clock went backwards by a substantial amount such
6747 that the microsecond fraction of "now" was more than the microsecond
6748 fraction of "then" (but the whole seconds number was less).
6750 38. Added support for the libradius Radius client library this is found on
6751 FreeBSD (previously only the radiusclient library was supported).
6757 1. When certain lookups returned multiple values in the form name=value, the
6758 quoting of the values was not always being done properly. Specifically:
6759 (a) If the value started with a double quote, but contained no whitespace,
6761 (b) If the value contained whitespace other than a space character (i.e.
6762 tabs or newlines or carriage returns) it was not quoted.
6763 This fix has been applied to the mysql and pgsql lookups by writing a
6764 separate quoting function and calling it from the lookup code. The fix
6765 should probably also be applied to nisplus, ibase and oracle lookups, but
6766 since I cannot test any of those, I have not disturbed their existing code.
6768 2. A hit in the callout cache for a specific address caused a log line with no
6769 reason for rejecting RCPT. Now it says "Previous (cached) callout
6770 verification failure".
6772 3. There was an off-by-one bug in the queryprogram router. An over-long
6773 return line was truncated at 256 instead of 255 characters, thereby
6774 overflowing its buffer with the terminating zero. As well as fixing this, I
6775 have increased the buffer size to 1024 (and made a note to document this).
6777 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6778 when Exim is waiting for an SMTP response from a remote server, Exim
6779 restarts its select() call on the socket, thereby resetting its timeout.
6780 This is not a problem when such interrupts are rare. Somebody set up a cron
6781 job to run exiwhat every 2 minutes, which is less than the normal select()
6782 timeout (5 or 10 minutes). This meant that the select() timeout never
6783 kicked in because it was always reset. I have fixed this by comparing the
6784 time when an interrupt arrives with the time at the start of the first call
6785 to select(). If more time than the timeout has elapsed, the interrupt is
6786 treated as a timeout.
6788 5. Some internal re-factoring in preparation for the addition of Sieve
6789 extensions (by MH). In particular, the "personal" test is moved to a
6790 separate function, and given an option for scanning Cc: and Bcc: (which is
6791 not set for Exim filters).
6793 6. When Exim created an email address using the login of the caller as the
6794 local part (e.g. when creating a From: or Sender: header line), it was not
6795 quoting the local part when it contained special characters such as @.
6797 7. Installed new OpenBSD configuration files.
6799 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6800 try to make them clearer.
6802 9. Callout options, other than the timeout value, were being ignored when
6803 verifying sender addresses in header lines. For example, when using
6805 verify = header_sender/callout=no_cache
6807 the cache was (incorrectly) being used.
6809 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6810 only the Cygwin environment.
6812 11. When return_path_on_delivery was set as a log selector, if different remote
6813 addresses in the same message used different return paths and parallel
6814 remote delivery occurred, the wrong values would sometimes be logged.
6815 (Whenever a remote delivery process finished, the return path value from
6816 the most recently started remote delivery process was logged.)
6818 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6819 lines when AUTH and/or TLS are in use. This is the "received protocol"
6820 field. Exim used to use "asmtp" for authenticated SMTP, without any
6821 indication (in the protocol name) for TLS use. Now it follows the RFC and
6822 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6823 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6824 names appear in log lines as well as in Received: header lines.
6826 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6827 extensions, and comparison tests, and to fix some bugs.
6829 14. Changes to the "personal" filter test:
6831 (1) The test was buggy in that it was just doing the equivalent of
6832 "contains" tests on header lines. For example, if a user's address was
6833 anne@some.where, the "personal" test would incorrectly be true for
6835 To: susanne@some.where
6837 This test is now done by extracting each address from the header in turn,
6838 and checking the entire address. Other tests that are part of "personal"
6839 are now done using regular expressions (for example, to check local parts
6840 of addresses in From: header lines).
6842 (2) The list of non-personal local parts in From: addresses has been
6843 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6844 taken from the Sieve specification recommendations.
6846 (3) If the message contains any header line starting with "List-" it is
6847 treated as non-personal.
6849 (4) The test for "circular" in the Subject: header line has been removed
6850 because it now seems ill-conceived.
6852 15. Minor typos in src/EDITME comments corrected.
6854 16. Installed latest exipick from John Jetmore.
6856 17. If headers_add on a router specified a text string that was too long for
6857 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6858 of string_sprintf() is now avoided.
6860 18. $message_body_size was not set (it was always zero) when running the DATA
6861 ACL and the local_scan() function.
6863 19. For the "mail" command in an Exim filter, no default was being set for
6864 the once_repeat time, causing a random time value to be used if "once" was
6865 specified. (If the value happened to be <= 0, no repeat happened.) The
6866 default is now 0s, meaning "never repeat". The "vacation" command was OK
6867 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6868 (I found it when inspecting the code).
6870 20. There is now an overall timeout for performing a callout verification. It
6871 defaults to 4 times the callout timeout, which applies to individual SMTP
6872 commands during the callout. The overall timeout applies when there is more
6873 than one host that can be tried. The timeout is checked before trying the
6874 next host. This prevents very long delays if there are a large number of
6875 hosts and all are timing out (e.g. when the network connections are timing
6876 out). The value of the overall timeout can be changed by specifying an
6877 additional sub-option for "callout", called "maxwait". For example:
6879 verify = sender/callout=5s,maxwait=20s
6881 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6882 to the end before writing, but this should make it even safer).
6884 22. Exim was forgetting that it had advertised PIPELINING for the second and
6885 subsequent messages on an SMTP connection. It was also not resetting its
6886 memory on STARTTLS and an internal HELO.
6888 23. When Exim logs an SMTP synchronization error within a session, it now
6889 records whether PIPELINING has been advertised or not.
6891 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6892 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6893 rather than long int.
6895 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6897 26. Added the never_mail option to autoreply.
6903 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6904 crash if the getsockname() call failed; this can happen if a connection is
6905 closed very soon after it is established. The problem was simply in the
6906 order in which certain operations were done, causing Exim to try to write
6907 to the SMTP stream before it had set up the file descriptor. The bug has
6908 been fixed by making things happen in the correct order.
6914 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6915 before the connection was closed, thus losing the rejection response.
6917 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6918 some early Solaris releases, but causes trouble in current releases where
6919 socklen_t is defined.
6921 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6924 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6927 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6928 that releasing the top of it at the end releases what was used for sub-
6929 expansions (unless the block got too big). However, discard this block if
6930 the first thing is a variable or header, so that we can use its block when
6931 it is dynamic (useful for very large $message_headers, for example).
6933 6. Lookups now cache *every* query, not just the most recent. A new, separate
6934 store pool is used for this. It can be recovered when all lookup caches are
6935 flushed. Lookups now release memory at the end of their result strings.
6936 This has involved some general refactoring of the lookup sources.
6938 7. Some code has been added to the store_xxx() functions to reduce the amount
6939 of flapping under certain conditions.
6941 8. log_incoming_interface used to affect only the <= reception log lines. Now
6942 it causes the local interface and port to be added to several more SMTP log
6943 lines, for example "SMTP connection from", and rejection lines.
6945 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6947 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6949 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6950 could be overwritten at the end of the current message (or the start of a
6951 new message if it was set in a HELO ACL). The value is now preserved for
6952 the duration of the SMTP connection.
6954 12. If a transport had a headers_rewrite setting, and a matching header line
6955 contained an unqualified address, that address was qualified, even if it
6956 did not match any rewriting rules. The underlying bug was that the values
6957 of the flags that permit the existence of unqualified sender and recipient
6958 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6959 non-local messages, and by -bnq for local messages) were not being
6960 preserved with the message after it was received.
6962 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6963 "next input=" as part of the text comprising the host identity instead of
6964 the correct text. The code was using the same buffer for two different
6965 strings. However, depending on which order the printing function evaluated
6966 its arguments, the bug did not always show up. Under Linux, for example, my
6967 test suite worked just fine.
6969 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6970 doesn't work with some older versions of Perl. It has been changed to "my",
6971 which in any case is probably the better facility to use.
6973 15. A really picky compiler found some instances of statements for creating
6974 error messages that either had too many or two few arguments for the format
6977 16. The size of the buffer for calls to the DNS resolver has been increased
6978 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6979 for addresses that have a lot of PTR records. This alleviates a problem; it
6980 does not fully solve it.
6982 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6983 buffer now truncates the list and logs the incident, which is the same
6984 action as happens when Exim is looking up a host name and its aliases.
6985 Previously in this situation something unpredictable would happen;
6986 sometimes it was "internal error: store_reset failed".
6988 18. If a server dropped the connection unexpectedly when an Exim client was
6989 using GnuTLS and trying to read a response, the client delivery process
6990 crashed while trying to generate an error log message.
6992 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6993 string, for example:
6995 warn message = H1: something\nH2: something
6997 the text was added as a single header line from Exim's point of view
6998 though it ended up OK in the delivered message. However, searching for the
6999 second and subsequent header lines using $h_h2: did not work. This has been
7000 fixed. Similarly, if a system filter added multiple headers in this way,
7001 the routers could not see them.
7003 20. Expanded the error message when iplsearch is called with an invalid key to
7004 suggest using net-iplsearch in a host list.
7006 21. When running tests using -bh, any delays imposed by "delay" modifiers in
7007 ACLs are no longer actually imposed (and a message to that effect is
7010 22. If a "gecos" field in a passwd entry contained escaped characters, in
7011 particular, if it contained a \" sequence, Exim got it wrong when building
7012 a From: or a Sender: header from that name. A second bug also caused
7013 incorrect handling when an unquoted " was present following a character
7014 that needed quoting.
7016 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
7017 was not being matched caselessly.
7019 24. Arranged for all hyphens in the exim.8 source to be escaped with
7022 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
7023 properly. Recipient callout cache records were still being keyed to include
7024 the sender, even when use_sender was set false. This led to far more
7025 callouts that were necessary. The sender is no longer included in the key
7026 when use_sender is false.
7028 26. Added "control = submission" modifier to ACLs.
7030 27. Added the ${base62d: operator to decode base 62 numbers.
7032 28. dnsdb lookups can now access SRV records.
7034 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
7035 the configuration file.
7037 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
7038 (-v) mode. This makes the output for a verbose queue run more intelligible.
7040 31. Added a use_postmaster feature to recipient callouts.
7042 32. Added the $body_zerocount variable, containing the number of binary zero
7043 bytes in the message body.
7045 33. The time of last modification of the "new" subdirectory is now used as the
7046 "mailbox time last read" when there is a quota error for a maildir
7049 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7051 35. Added +ignore_unknown as a special item in host lists.
7053 36. Code for decoding IPv6 addresses in host lists is now included, even if
7054 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7055 address was recognized as an IP address, but was then not correctly decoded
7056 into binary, causing unexpected and incorrect effects when compared with
7063 1. Very minor rewording of debugging text in manualroute to say "list of
7064 hosts" instead of "hostlist".
7066 2. If verify=header_syntax was set, and a header line with an unqualified
7067 address (no domain) and a large number of spaces between the end of the
7068 name and the colon was received, the reception process suffered a buffer
7069 overflow, and (when I tested it) crashed. This was caused by some obsolete
7070 code that should have been removed. The fix is to remove it!
7072 3. When running in the test harness, delay a bit after writing a bounce
7073 message to get a bit more predictability in the log output.
7075 4. Added a call to search_tidyup() just before forking a reception process. In
7076 theory, someone could use a lookup in the expansion of smtp_accept_max_
7077 per_host which, without the tidyup, could leave open a database connection.
7079 5. Added the variables $recipient_data and $sender_data which get set from a
7080 lookup success in an ACL "recipients" or "senders" condition, or a router
7081 "senders" option, similar to $domain_data and $local_part_data.
7083 6. Moved the writing of debug_print from before to after the "senders" test
7086 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7087 problems for message scanning, either using a data ACL, or using
7088 local_scan() because the Received: header was not generated till after they
7089 were called (in order to set the time as the time of reception completion).
7090 I have revised the way this works. The header is now generated after the
7091 body is received, but before the ACL or local_scan() are called. After they
7092 are run, the timestamp in the header is updated.
7098 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7099 before starting a queue runner without re-exec. This happened only when
7100 deliver_drop_privilege was set or when the Exim user was set to root. The
7101 effect of the bug was that timeouts during subsequent deliveries caused
7102 crashes instead of being properly handled. The handler is now left at its
7103 default (and expected) setting.
7105 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7106 message, again when deliver_drop_privilege is set or Exim is run as root.
7107 The bug described in (1) was not present in this case, but the tidying up
7108 of the other signals was missing. I have made the two cases consistent.
7110 3. The ignore_target_hosts setting on a manualroute router was being ignored
7111 for hosts that were looked up using the /MX notation.
7113 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7116 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7117 operated on the sender address. After changing the $sender_address to <>
7118 for the sender address verify, Exim was re-instated it as the original
7119 (before rewriting) address, but remembering that it had rewritten it, so it
7120 wasn't rewriting it again. This bug also had the effect of breaking the
7121 sender address verification caching when the sender address was rewritten.
7123 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7124 This has been changed so that if the ip literal address matches
7125 ignore_target_hosts, the router declines.
7127 7. Added expansion conditions match_domain, match_address, and match_local_
7128 part (NOT match_host).
7130 8. The placeholder for the Received: header didn't have a length field set.
7132 9. Added code to Exim itself and to exim_lock to test for a specific race
7133 condition that could lead to file corruption when using MBX delivery. The
7134 issue is with the lockfile that is created in /tmp. If this file is removed
7135 after a process has opened it but before that process has acquired a lock,
7136 there is the potential for a second process to recreate the file and also
7137 acquire a lock. This could lead to two Exim processes writing to the file
7138 at the same time. The added code performs the same test as UW imapd; it
7139 checks after acquiring the lock that its file descriptor still refers to
7140 the same named file.
7142 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7143 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7146 11. Added the smtp_active_hostname option. If used, this will typically be made
7147 to depend on the incoming interface address. Because $interface_address is
7148 not set up until the daemon has forked a reception process, error responses
7149 that can happen earlier (such as "too many connections") no longer contain
7152 12. If an expansion in a condition on a "warn" statement fails because a lookup
7153 defers, the "warn" statement is abandoned, and the next ACL statement is
7154 processed. Previously this caused the whole ACL to be aborted.
7156 13. Added the iplsearch lookup type.
7158 14. Added ident_timeout as a log selector.
7160 15. Added tls_certificate_verified as a log selector.
7162 16. Added a global option tls_require_ciphers (compare the smtp transport
7163 option of the same name). This controls incoming TLS connections.
7165 17. I finally figured out how to make tls_require_ciphers do a similar thing
7166 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7167 before starting the TLS session.
7169 18. Tabs are now shown as \t in -bP output.
7171 19. If the log selector return_path_on_delivery was set, Exim crashed when
7172 bouncing a message because it had too many Received: header lines.
7174 20. If two routers both had headers_remove settings, and the first one included
7175 a superfluous trailing colon, the final name in the first list and the
7176 first name in the second list were incorrectly joined into one item (with a
7177 colon in the middle).
7183 1. Added -C and -D options to the exinext utility, mainly to make it easier
7184 to include in the automated testing, but these could be helpful when
7185 multiple configurations are in use.
7187 2. The exinext utility was not formatting the output nicely when there was
7188 an alternate port involved in the retry record key, nor when there was a
7189 message id as well (for retries that were specific to a specific message
7190 and a specific host). It was also confused by IPv6 addresses, because of
7191 the additional colons they contain. I have fixed the IPv4 problem, and
7192 patched it up to do a reasonable job for IPv6.
7194 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7195 delivery, the log line now contains "pipelined" if PIPELINING was used.
7197 4. An SMTP transport process used to panic and die if the bind() call to set
7198 an explicit outgoing interface failed. This has been changed; it is now
7199 treated in the same way as a connect() failure.
7201 5. A reference to $sender_host_name in the part of a conditional expansion
7202 that was being skipped was still causing a DNS lookup. This no longer
7205 6. The def: expansion condition was not recognizing references to header lines
7206 that used bh_ and bheader_.
7208 7. Added the _cache feature to named lists.
7210 8. The code for checking quota_filecount in the appendfile transport was
7211 allowing one more file than it should have been.
7213 9. For compatibility with Sendmail, the command line option
7221 and sets the incoming protocol and host name (for trusted callers). The
7222 host name and its colon can be omitted when only the protocol is to be set.
7223 Note the Exim already has two private options, -pd and -ps, that refer to
7224 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7225 "s", but I don't think that's a major issue.
7227 10. A number of refactoring changes to the code, none of which should affect
7230 (a) The number of logging options was getting close to filling up the
7231 32-bit word that was used as a bit map. I have split them into two classes:
7232 those that are passed in the argument to log_write(), and those that are
7233 only ever tested independently outside of that function. These are now in
7234 separate 32-bit words, so there is plenty of room for expansion again.
7235 There is no change in the user interface or the logging behaviour.
7237 (b) When building, for example, log lines, the code previously used a
7238 macro that called string_cat() twice, in order to add two strings. This is
7239 not really sufficiently general. Furthermore, there was one instance where
7240 it was actually wrong because one of the argument was used twice, and in
7241 one call a function was used. (As it happened, calling the function twice
7242 did not affect the overall behaviour.) The macro has been replaced by a
7243 function that can join an arbitrary number of extra strings onto a growing
7246 (c) The code for expansion conditions now uses a table and a binary chop
7247 instead of a serial search (which was left over from when there were very
7248 few conditions). Also, it now recognizes conditions like "pam" even when
7249 the relevant support is not compiled in: a suitably worded error message is
7250 given if an attempt is made to use such a condition.
7252 11. Added ${time_interval:xxxxx}.
7254 12. A bug was causing one of the ddress fields not to be passed back correctly
7255 from remote delivery subprocesses. The field in question was not being
7256 subsequently used, so this caused to problems in practice.
7258 13. Added new log selectors queue_time and deliver_time.
7260 14. Might have fixed a bug in maildirsizefile handling that threw up
7261 "unexpected character" debug warnings, and recalculated the data
7262 unnecessarily. In any case, I expanded the warning message to give more
7265 15. Added the message "Restricted characters in address" to the statements in
7266 the default ACL that block characters like @ and % in local parts.
7268 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7269 Three changes have been made:
7271 (a) There was a serious bug; a negative response to MAIL caused the whole
7272 recipient domain to be cached as invalid, thereby blocking all messages
7273 to all local parts at the same domain, from all senders. This bug has
7274 been fixed. The domain is no longer cached after a negative response to
7275 MAIL if the sender used is not empty.
7277 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7280 (c) A new callout option, "use_sender" has been added for people who want
7281 the modified behaviour.
7287 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7290 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7291 indeed breaks things for older releases.
7293 3. Added additional logging to the case where there is a problem reading data
7294 from a filter that is running in a subprocess using a pipe, in order to
7295 try to track down a specific problem.
7297 4. Testing facility fudge: when running in the test harness and attempting
7298 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7299 getting "No route to host". Convert this to a timeout.
7301 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7304 6. Some OS don't have socklen_t but use size_t instead. This affects the
7305 fifth argument of getsockopt() amongst other things. This is now
7306 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7307 can be set for individual OS. I have set it for SunOS5, OSF1, and
7308 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7309 some earlier ones do not.
7311 7. Change 4.30/15 was not doing the test caselessly.
7313 8. The standard form for an IPv6 address literal was being rejected by address
7314 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7315 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7316 this, as well as the form without the "IPv6" on the front (but only when
7317 address literals are enabled, of course).
7319 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7321 10. Exim crashed if a message with an empty sender address specified by -f
7322 encountered a router with an errors_to setting. This could be provoked only
7323 by a command such as
7327 where an empty string was supplied; "<>" did not hit this bug.
7329 11. Installed PCRE release 4.5.
7331 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7332 remained set. It is now erased.
7334 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7335 times from message ids (which are base 36 rather than the normal 62).
7337 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7338 were being counted as actual protocol errors, and logged if the log
7339 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7340 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7341 and DATA following a set of rejected RCPTs do not count as protocol errors.
7342 In other words, Exim assumes they were pipelined, though this may not
7343 actually be the case. Of course, in all cases the client gets an
7344 appropriate error code.
7346 15. If a lookup fails in an ACL condition, a message about the failure may
7347 be available; it is used if testing the ACL cannot continue, because most
7348 such messages specify what the cause of the deferral is. However, some
7349 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7350 that caused an old message to be retained and used if a later statement
7351 caused a defer, replacing the real cause of the deferral.
7353 16. If an IP address had so many PTR records that the DNS lookup buffer
7354 was not large enough to hold them, Exim could crash while trying to process
7355 the truncated data. It now detects and logs this case.
7357 17. Further to 4.21/58, another change has been made: if (and only if) the
7358 first line of a message (the first header line) ends with CRLF, a bare LF
7359 in a subsequent header line has a space inserted after it, so as not to
7360 terminate the header.
7362 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7363 unnecessarily, used atoi() instead of strtol(), and didn't check the
7364 termination when getting file sizes from file names by regex.
7366 19. Completely re-implemented the support for maildirsize files, in the light
7367 of a number of problems with the previous contributed implementation
7368 (4.30/29). In particular:
7370 . If the quota is zero, the maildirsize file is maintained, but no quota is
7373 . If the maildir directory does not exist, it is created before any attempt
7374 to write a maildirsize file.
7376 . The quota value in the file is just a cache; if the quota is changed in
7377 the transport, the new value overrides.
7379 . A regular expression is available for excluding directories from the
7382 20. The autoreply transport checks the characters in options that define the
7383 message's headers; it allows continued headers, but it was checking with
7384 isspace() after an embedded newline instead of explicitly looking for a
7387 21. If all the "regular" hosts to which an address was routed had passed their
7388 expiry times, and had not reached their retry times, the address was
7389 bounced, even if fallback hosts were defined. Now Exim should go on to try
7392 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7393 equivalent code in the SMTP transport. Some hosts send humungous responses
7394 to HELO/EHLO, more than 1024 it seems.
7396 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7397 gives compiler warnings in some environments. I've now done it "properly",
7400 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7401 (because of problems with the built-in one) was declared to return uschar *
7402 instead of char *, causing compiler failure.
7404 25. Fixed a file descriptor leak when processing alias/forward files.
7406 26. Fixed a minor format string issue in dbfn.c.
7408 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7410 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7411 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7414 29. When a sender address is verified, it is cached, to save repeating the test
7415 when there is more than one recipient in a message. However, when the
7416 verification involves a callout, it is possible for different callout
7417 options to be set for different recipients. It is too complicated to keep
7418 track of this in the cache, so now Exim always runs a verification when a
7419 callout is required, relying on the callout cache for the optimization.
7420 The overhead is duplication of the address routing, but this should not be
7423 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7424 to be verified with callout=postmaster, and the main callout worked but the
7425 postmaster check failed, the verification correctly failed. However, if a
7426 subsequent RCPT command asked for sender verification *without* the
7427 postmaster check, incorrect caching caused this verification also to fail,
7430 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7431 it was not caching the DNS options (qualify_single, search_parents) that
7432 were used when the lookup failed. A subsequent lookup with different
7433 options therefore always gave the same answer, though there were cases
7434 where it should not have. (Example: a "domains = !$mx_any" option on a
7435 dnslookup router: the "domains" option is always processed without any
7436 widening, but the router might have qualify_single set.) Now Exim uses the
7437 cached value only when the same options are set.
7439 32. Added John Jetmore's "exipick" utility to the distribution.
7441 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7442 than a timeout (e.g. a certificate is required, and is not provided), an
7443 Exim server now closes the connection immediately. Previously it waited for
7444 the client to close - but if the client is SSL, it seems that they each
7445 wait for each other, leading to a delay before one of them times out.
7447 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7448 maintained 0.8.x compatibility because I don't think many are using it, and
7449 it is clearly obsolete.
7451 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7454 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7455 client certificate was expired. A simple patch fixes this, though I don't
7456 understand the full logic of why the verify callback is called multiple
7459 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7460 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7461 which causes problems with some clients (such as the Certicom SSL Plus
7462 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7463 disables the coutermeasure allowing Eudora to connect."
7465 38. Exim was not checking that a write() to a log file succeeded. This could
7466 lead to Bad Things if a log got too big, in particular if it hit a file
7467 size limit. Exim now panics and dies if it cannot write to a log file, just
7468 as it does if it cannot open a log file.
7470 39. Modified OS/Makefile-Linux so that it now contains
7472 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7474 The two -D definitions ensure that Exim is compiled with large file
7475 support, which makes it possible to handle log files that are bigger than
7478 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7479 instance) a domain was checked against a named list that involved a lookup,
7480 causing $domain_data to be set, then another domain was checked against the
7481 same list, then the first domain was re-checked, the value of $domain_data
7482 after the final check could be wrong. In particular, if the second check
7483 failed, it could be set empty. This bug probably also applied to
7486 41. The strip_trailing_dot option was not being applied to the address given
7487 with the -f command-line option.
7489 42. The code for reading a message's header from the spool was incrementing
7490 $received_count, but never initializing it. This meant that the value was
7491 incorrect (doubled) while delivering a message in the same process in which
7492 it was received. In the most common configuration of Exim, this never
7493 happens - a fresh exec is done - but it can happen when
7494 deliver_drop_privilege is set.
7496 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7497 it now includes up to 150 characters of the unexpected data in the log
7500 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7501 and building data strings. The size of both of these buffers was 10 000
7502 bytes - far larger than anybody would *ever* want, thought I. Needless to
7503 say, somebody hit the limit. I have increased the maximum line length to
7504 20 000 and the maximum data length of concatenated lines to 100 000. I have
7505 also fixed two bugs, because there was no checking on these buffers. Tsk,
7506 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7507 buffer is too small.
7509 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7510 lsearch lookups. Now it does.
7512 46. When parsing a route_list item in a manualroute router, a fixed-length
7513 buffer was used for the list of hosts. I made this 1024 bytes long,
7514 thinking that nobody would ever have a list of hosts that long. Wrong.
7515 Somebody had a whole pile of complicated expansion conditions, and the
7516 string was silently truncated, leading to an expansion error. It turns out
7517 that it is easier to change to an unlimited length (owing to other changes
7518 that have happened since this code was originally written) than to build
7519 structure for giving a limitation error. The length of the item that
7520 expands into the list of hosts is now unlimited.
7522 47. The lsearch lookup could not handle data where the length of text line was
7523 more than 4095 characters. Such lines were truncated, leading to shortened
7524 data being returned. It should now handle lines of any length.
7526 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7527 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7530 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7531 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7532 no longer happens in comment lines. A list of replacements is now placed
7533 at the head of all of the source files, except those whose only change is
7534 to replace PERL_COMMAND in the very first #! line.
7536 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7537 messages on the queue, with a bottom-up merge sort, using code contributed
7538 by Michael Haardt. This should make operations like -bp somewhat faster on
7539 large queues. It won't affect queue runners, except when queue_run_in_order
7542 51. Installed eximstats 1.31 in the distribution.
7544 52. Added support for SRV lookups to the dnslookup router.
7546 53. If an ACL referred to $message_body or $message_body_end, the value was not
7547 reset for any messages that followed in the same SMTP session.
7549 54. The store-handling optimization for building very long strings was not
7550 differentiating between the different store pools. I don't think this
7551 actually made any difference in practice, but I've tidied it.
7553 55. While running the routers to verify a sender address, $sender_address
7554 was still set to the sender address. This is wrong, because when routing to
7555 send a bounce to the sender, it would be empty. Therefore, I have changed
7556 it so that, while verifying a sender address, $sender_address is set to <>.
7557 (There is no change to what happens when verifying a recipient address.)
7559 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7560 target A or AAAA records (if not already returned) without resetting the
7561 qualify_single or search_parents options of the DNS resolver. These are
7562 inappropriate in this case because the targets of MX and SRV records must
7563 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7564 target that, when qualified, matched something in the local domain. These
7565 two options are now turned off when doing these lookups.
7567 57. It seems that at least some releases of Reiserfs (which does not have the
7568 concept of a fixed number of inodes) returns zero and not -1 for the
7569 number of available inodes. This interacted badly with check_spool_inodes,
7570 which assumed that -1 was the "no such thing" setting. What I have done is
7571 to check that the total number of inodes is greater than zero before doing
7572 the test of how many are available.
7574 58. When a "warn" ACL statement has a log_message modifier, the message is
7575 remembered, and not repeated. This is to avoid a lot of repetition when a
7576 message has many recipients that cause the same warning to be written.
7577 However, Exim was preserving the list of already written lines for an
7578 entire SMTP session, which doesn't seem right. The memory is now reset if a
7579 new message is started.
7581 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7582 debugging output unless log_rewrite was also set.
7584 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7585 of (int)(handle) when we know that handle contains (void *)(-1).
7587 61. The Exim daemon panic-logs an error return when it closes the incoming
7588 connection. However "connection reset by peer" seems to be common, and
7589 isn't really an error worthy of noting specially, so that particular error
7592 62. When Exim is trying to find all the local interfaces, it used to panic and
7593 die if the ioctl to get the interface flags failed. However, it seems that
7594 on at least one OS (Solaris 9) it is possible to have an interface that is
7595 included in the list of interfaces, but for which you get a failure error
7596 for this call. This happens when the interface is not "plumbed" into a
7597 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7598 failure of the "get flags" call assumes that the interface is down.
7600 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7601 makes life easier for people who are doing arithmetic on fields extracted
7602 from dates, where you often get leading zeros that should not be
7603 interpreted as octal.
7605 64. Added qualify_domain to the redirect router, to override the global
7608 65. If a pathologically long header line contained very many addresses (the
7609 report of this problem mentioned 10 000) and each of them was rewritten,
7610 Exim could use up a very large amount of memory. (It kept on making new
7611 copies of the header line as it rewrote, and never released the old ones.)
7612 At the expense of a bit more processing, the header rewriting function has
7613 been changed so that it no longer eats memory in this way.
7615 66. The generation of the Received: header has been moved from the time that a
7616 message starts to be received, to the time that it finishes. The timestamp
7617 in the Received: header should now be very close to that of the <= log
7618 line. There are two side-effects of this change:
7620 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7621 logged header lines no longer include the local Received: line, because
7622 it has not yet been created. The same applies to a copy of the message
7623 that is returned to a non-SMTP sender when a message is rejected.
7625 (b) When a filter file is tested using -bf, no additional Received: header
7626 is added to the test message. After some thought, I decided that this
7629 This change does not affect the value of $received_for. It is still set
7630 after address rewriting, but before local_scan() is called.
7632 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7634 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7635 gave an unhelpful panic error message, and a defer error. I have managed to
7636 change this behaviour so that it now rejects any supplied certificate,
7637 which seems right, as the list of acceptable certificates is empty.
7639 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7640 gave an unhelpful defer error. I have not managed to make this reject any
7641 supplied certificates, but the error message it gives is "no certificate
7642 supplied", which is not helpful.
7644 70. exigrep's output now also includes lines that are not associated with any
7645 message, but which match the given pattern. Implemented by a patch from
7646 Martin Sluka, which also tidied up the Perl a bit.
7648 71. Recipient callout verification, like sender verification, was using <> in
7649 the MAIL FROM command. This isn't really the right thing, since the actual
7650 sender may affect whether the remote host accepts the recipient or not. I
7651 have changed it to use the actual sender in the callout; this means that
7652 the cache record is now keyed on a recipient/sender pair, not just the
7653 recipient address. There doesn't seem to be a real danger of callout loops,
7654 since a callout by the remote host to check the sender would use <>.
7655 [SEE ABOVE: changed after hitting problems.]
7657 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7658 temporary errors. However, in the case of such a code being given after
7659 the end of a data transmission (i.e. after ".") Exim was failing to write
7660 a retry record for the message. (Yes, there was some broken host that was
7661 actually sending 8xx at this point.)
7663 73. An unknown lookup type in a host list could cause Exim to panic-die when
7664 the list was checked. (An example that provoked this was putting <; in the
7665 middle of a list instead of at the start.) If this happened during a DATA
7666 ACL check, a -D file could be left lying around. This kind of configuration
7667 error no longer causes Exim to die; instead it causes a defer error. The
7668 incident is still logged to the main and panic logs.
7670 74. Buglet left over from Exim 3 conversion. The message "too many messages
7671 in one connection" was written to the rejectlog but not the mainlog, except
7672 when address rewriting (yes!) was being logged.
7674 75. Added write_rejectlog option.
7676 76. When a system filter was run not as root (that is, when system_filter_user
7677 was set), the values of the $n variables were not being returned to the
7678 main process; thus, they were not subsequently available in the $sn
7681 77. Added +return_path_on_delivery log selector.
7683 78. A connection timeout was being treated differently from recipients deferred
7684 when testing hosts_max_try with a message that was older than the host's
7685 retry timeout. (The host should not be counted, thus allowing all hosts to
7686 be tried at least once before bouncing.) This may have been the cause of an
7687 occasionally reported bug whereby a message would remain on the queue
7688 longer than the retry timeout, but would be bounced if a delivery was
7689 forced. I say "may" because I never totally pinned down the problem;
7690 setting up timeout/retry tests is difficult. See also the next item.
7692 79. The ultimate address timeout was not being applied to errors that involved
7693 a combination of host plus message (for example, a timeout on a MAIL
7694 command). When an address resolved to a number of possible hosts, and they
7695 were not all tried for each delivery (e.g. because of hosts_max_try), a
7696 message could remain on the queue longer than the retry timeout.
7698 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7701 81. Fixed an obscure SMTP outgoing bug which required at least the following
7702 conditions: (a) there was another message waiting for the same server;
7703 (b) the server returned 5xx to all RCPT commands in the first message so
7704 that the message was not completed; (c) the server dropped the connection
7705 or gave a negative response to the RSET that Exim sends to abort the
7706 transaction. The observed case was a dropped connection after DATA that had
7707 been sent in pipelining mode. That is, the server had advertised PIPELINING
7708 but was not implementing it correctly. The effect of the bug was incorrect
7709 behaviour, such as trying another host, and this could lead to a crash.
7715 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7716 and daemon.c were passed as pointers to ints; they should have been
7717 pointers to socklen_t variables (which are typically unsigned ints).
7719 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7722 3. Fixed a really odd bug that affected only the testing scheme; patching a
7723 certain fixed string in the binary changed the value of another string that
7724 happened to be identical to the end of the original first string.
7726 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7727 name", it returns that address as the IP address. On some operating
7728 systems (e.g. Solaris), it also passes back the IP address string as the
7729 "host name". However, on others (e.g. Linux), it passes back an empty
7730 string. Exim wasn't checking for this, and was changing the host name to an
7731 empty string, assuming it had been canonicalized.
7733 5. Although rare, it is permitted to have more than one PTR record for a given
7734 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7735 all the names associated with an address, because they do in Solaris.
7736 However, it seems that they do not in Linux for data that comes from the
7737 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7738 I found this out when I moved to a new Linux workstation and tried to run
7739 the Exim test suite.
7741 To get round this problem I have changed the code so that it now does its
7742 own call to the DNS to look up PTR records when searching for a host name.
7743 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7744 addresses that are only in /etc/hosts are still found.
7746 This behaviour is, however, controlled by an option called host_lookup_
7747 order, which defaults to "bydns:byaddr". If people want to use the other
7748 order, or indeed, just use one or the other means of lookup, they can
7749 specify it in this variable.
7751 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7752 some operating systems, this comes back from gethostbyaddr() as an empty
7753 string, and this is what Exim used to test for. However, it seems that in
7754 other systems, "." is yielded. Exim now tests for this case too.
7756 7. The values of check_spool_space and check_log_space are now held internally
7757 as a number of kilobytes instead of an absolute number of bytes. If a
7758 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7759 kilobyte. This means that much larger values can be stored.
7761 8. Exim monitor: an attempt to get the action menu when not actually pointing
7762 at a message produces an empty menu entitled "No message selected". This
7763 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7764 no entries in it ("Shell widget menu has zero width and/or height"). So I
7765 have added a single, blank menu entry in this case.
7767 9. Added ${quote_local_part.
7769 10. MIME decoding is now applied to the contents of Subject: header lines when
7772 11. Now that a reference to $sender_host_address automatically causes a reverse
7773 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7774 host lookup before query-style lookups in lists that might use this
7775 variable. This has therefore been abolished, and the "net-" prefix is no
7776 longer necessary for query-style lookups.
7778 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7779 have been a typo for LFLAGS, so it has been changed.
7781 13. The install script calls Exim with "-C /dev/null" in order to find the
7782 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7783 to be output. However, since Exim outputs its version number before the
7784 error, it didn't break the script. It just looked ugly. I fixed this by
7785 always allowing "-C /dev/null" if the caller is root.
7787 14. Ignore overlarge ACL variable number when reading spool file - insurance
7788 against a later release with more variables having written the file.
7790 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7791 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7792 this, as well as the form without the "IPv6" on the front.
7794 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7795 OS/Makefile-Darwin file.
7797 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7798 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7800 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7801 variable. However, some OS use ints for inodes. I've added cast to long int
7802 to get rid of the compiler warning.
7804 19. I had forgotten to lock out "/../" in configuration file names when
7805 ALT_CONFIG_PREFIX was set.
7807 20. Routers used for verification do not need to specify transports. However,
7808 if such a router generated a host list, and callout was configured, Exim
7809 crashed, because it could not find a port number from the (non-existent)
7810 transport. It now assumes port 25 in this circumstance.
7812 21. Added the -t option to exigrep.
7814 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7815 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7816 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7817 them is set, LOOKUP_LSEARCH is forced.
7819 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7821 24. Added sender and host information to the "rejected by local_scan()" log
7822 line; previously there was no indication of these.
7824 25. Added .include_if_exists.
7826 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7827 Linux. It turns out that not all file systems support this. Apparently some
7828 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7829 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7830 not supported on the file descriptor, is now ignored when Exim is trying to
7831 sync a directory. This applies only to Linux.
7833 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7835 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7836 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7839 29. Added support for maildirsize files from supplied patch (modified a bit).
7841 30. The use of :fail: followed by an empty string could lead Exim to respond to
7842 sender verification failures with (e.g.):
7844 550 Verification failed for <xxx>
7845 550 Sender verify failed
7847 where the first response line was missing the '-' that indicates it is not
7848 the final line of the response.
7850 31. The loop for finding the name of the user that called Exim had a hardwired
7851 limit of 10; it now uses the value of finduser_retries, which is used for
7852 all other user lookups.
7854 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7857 33. Exim was neglecting to zero errno before one call of strtol() when
7858 expanding a string and expecting an integer value. On some systems this
7859 resulted in spurious "integer overflow" errors. Also, it was casting the
7860 result into an int without checking.
7862 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7863 did not work. The code looks as if it has *never* worked, though it appears
7864 to have been documented since at least release 1.62. I have made it work.
7866 35. The "timeout_DNS" error in retry rules, also documented since at least
7867 1.62, also never worked. As it isn't clear exactly what this means, and
7868 clearly it isn't a major issue, I have abolished the feature by treating it
7869 as "timeout", and writing a warning to the main and panic logs.
7871 36. The display of retry rules for -brt wasn't always showing the error code
7874 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7875 timeout_connect_A, timeout_connect_MX.
7877 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7878 to the empty sender.
7880 39. The daemon was not analysing the content of -oX till after it had closed
7881 stderr and disconnected from the controlling terminal. This meant that any
7882 syntax errors were only noted on the panic log, and the return code from
7883 the command was 0. By re-arranging the code a little, I've made the
7884 decoding happen first, so such errors now appear on stderr, and the return
7885 code is 1. However, the actual setting up of the sockets still happens in
7886 the disconnected process, so errors there are still only recorded on the
7889 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7890 connections (as happens on some IP stacks) was logged at start up time as
7891 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7892 it from "IPv6 and IPv4", which means that two separate sockets are being
7895 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7896 says whether AF_INET or AF_INET6 was passed as an argument.
7898 42. Exiwhat output was messed up when time zones were included in log
7901 43. Exiwhat now gives more information about the daemon's listening ports,
7902 and whether -tls-on-connect was used.
7904 44. The "port" option of the smtp transport is now expanded.
7906 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7907 silently ignored. Now an error message is written to the main and panic
7910 46. There's a new ACL modifier called "logwrite" which writes to a log file
7911 as soon as it is encountered.
7913 47. Added $local_user_uid and $local_user_gid at routing time.
7915 48. Exim crashed when trying to verify a sender address that was being
7918 49. Exim was recognizing only a space character after ".include". It now also
7919 recognizes a tab character.
7921 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7922 extracting the relevant information from the specification. The man page no
7923 longer contains scrambled data for the -d option, and I've added a section
7924 at the front about calling Exim under different names.
7926 51. Added "extra_headers" argument to the "mail" command in filter files.
7928 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7931 53. Installed eximstats 1.29.
7933 54. Added transport_filter_timeout as a generic transport option.
7935 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7936 Cc: header lines. This was required by RFC 822, but it not required by RFC
7939 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7940 incoming messages that did not have them. Now it does so only if the
7941 message originates locally, that is, if there is no associated remote host
7942 address. When Resent- header lines are present, this applies to the Resent-
7943 lines rather than the non-Resent- lines.
7945 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7946 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7948 58. Messages for configuration errors now include the name of the main
7949 configuration file - useful now that there may be more than one file in a
7950 list (.included file names were always shown).
7952 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7953 for those rare installations that do not start the daemon as root or run it
7954 setuid root. I've cut out the call to initgroups() if the daemon is not
7957 60. The Exim user and group can now be bound into the binary as text strings
7958 that are looked up at the start of Exim's processing.
7960 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7962 62. Added $mailstore_basename variable.
7964 63. Installed patch to sieve.c from Michael Haardt.
7966 64. When Exim failed to open the panic log after failing to open the main log,
7967 the original message it was trying to log was written to stderr and debug
7968 output, but if they were not available (the usual case in production), it
7969 was lost. Now it is written to syslog before the two lines that record the
7970 failures to open the logs.
7972 65. Users' Exim filters run in subprocesses under the user's uid. It is
7973 possible for a "deliver" command or an alias in a "personal" command to
7974 provoke an address rewrite. If logging of address rewriting is configured,
7975 this fails because the process is not running as root or exim. There may be
7976 a better way of dealing with this, but for the moment (because 4.30 needs
7977 to be released), I have disabled address rewrite logging when running a
7978 filter in a non-root, non-exim process.
7984 1. The buildconfig auxiliary program wasn't quoting the value set for
7985 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7986 not defined. This bug was masked in 4.22 by the effect that was fixed in
7989 2. Some messages that were rejected after a message id was allocated were
7990 shown as "incomplete" by exigrep. It no longer does this for messages that
7991 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7993 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7994 have allow_domain_literals set, the ID did not get logged in the <= line.
7995 Domain literals are now always recognized in Message-ID: header lines.
7997 4. The first argument for a ${extract expansion item is the key name or field
7998 number. Leading and trailing spaces in this item were not being ignored,
7999 causing some misleading effects.
8001 5. When deliver_drop_privilege was set, single queue runner processes started
8002 manually (i.e. by the command "exim -q") or by the daemon (which uses the
8003 same command in the process it spins off) were not dropping privilege.
8005 6. When the daemon running as "exim" started a queue runner, it always
8006 re-executed Exim in the spun-off process. This is a waste of effort when
8007 deliver_drop_privilege is set. The new process now just calls the
8008 queue-runner function directly.
8014 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
8017 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
8018 ignored. Though the use of -oP was forcing the writing of a pid file, it
8019 was always written to the default place.
8021 3. If the message "no IP address found for host xxxx" is generated during
8022 incoming verification, it is now followed by identification of the incoming
8023 connection (so you can more easily find what provoked it).
8025 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
8027 5. Added some features to "harden" Exim a bit more against certain attacks:
8029 (a) There is now a build-time option called FIXED_NEVER_USERS that can
8030 be put in Local/Makefile. This is like the never_users runtime option,
8031 but it cannot be overridden. The default setting is "root".
8033 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
8034 prefix string with which any file named in a -C command line option
8037 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
8038 is retained for -C and -D only if the caller of Exim is root. Without
8039 it, the exim user may also use -C and -D and retain privilege.
8041 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8042 command line option is disabled.
8044 6. Macro names set by the -D option must start with an upper case letter, just
8045 like macro names defined in the configuration file.
8047 7. Added "dereference=" facility to LDAP.
8049 8. Two instances of the typo "uknown" in the source files are fixed.
8051 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8052 the Configure-Makefile script screwed up while processing it.
8054 10. Incorporated PCRE 4.4.
8056 11. The SMTP synchronization check was not operating right at the start of an
8057 SMTP session. For example, it could not catch a HELO sent before the client
8058 waited for the greeting. There is now a check for outstanding input at the
8059 point when the greeting is written. Because of the duplex, asynchronous
8060 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8061 way, but not yet received, when the check is performed.
8063 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8064 on TCP/IP sockets, because this apparently causes some broken clients to
8067 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8068 unchanged) from the Cygwin maintainer.
8070 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8071 was supported instead of testing for mbx. Effectively a typo.
8073 15. The spa authenticator server code was not checking that the input it
8074 received was valid base64.
8076 16. The debug output line for the "set" modifier in ACLs was not showing the
8077 name of the variable that was being set.
8079 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8081 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8082 lookup on its own. Something else was needed to trigger the lookup. For
8083 example, a match in host_lookup or the need for a host name in a host list.
8084 Now, if $sender_host_name is referenced and the host name has not yet been
8085 looked up, a lookup is performed. If the lookup fails, the variable remains
8086 empty, and $host_lookup_failed is set to "1".
8088 19. Added "eqi" as a case-independent comparison operator.
8090 20. The saslauthd authentication condition could segfault if neither service
8091 nor realm was specified.
8093 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8094 error message that was logged was misleading, and incoming SMTP
8095 connections were dropped. The message is now more accurate, and temporary
8096 errors are given to SMTP connections.
8098 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8099 (except RSET) with a 421 error, until QUIT is received. However, it was
8100 failing to send a response to QUIT.
8102 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8103 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8104 ACL is now run after the helo_try_verify_hosts code.
8106 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8107 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8108 case-independent, so other case variants are also recognized). Apparently
8109 some systems use these upper case variants.
8111 25. If more than two messages were waiting for the same host, and a transport
8112 filter was specified for the transport, Exim sent two messages over the
8113 same TCP/IP connection, and then failed with "socket operation on non-
8114 socket" when it tried to send the third.
8116 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8118 27. The extern definition of crypt16() in expand.c was not being excluded when
8119 the OS had its own crypt16() function.
8121 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8122 as a preferred synonym for return_size_limit, both as an option and as an
8125 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8127 30. Changed the default configuration ACL to relax the local part checking rule
8128 for addresses that are not in any local domains. For these addresses,
8129 slashes and pipe symbols are allowed within local parts, but the sequence
8130 /../ is explicitly forbidden.
8132 31. SPA server authentication was not clearing the challenge buffer before
8135 32. log_message in a "warn" ACL statement was writing to the reject log as
8136 well as to the main log, which contradicts the documentation and doesn't
8137 seem right (because no rejection is happening). So I have stopped it.
8139 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8140 However, I am unable to do any testing of this.
8142 34. Fixed an infelicity in the appendfile transport. When checking directories
8143 for a mailbox, to see if any needed to be created, it was accidentally
8144 using path names with one or more superfluous leading slashes; tracing
8145 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8147 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8148 contents are added to the log line that is written for every discarded
8149 recipient. (Previously a log_message setting was ignored.)
8151 36. The ${quote: operator now quotes the string if it is empty.
8153 37. The install script runs exim in order to find its version number. If for
8154 some reason other than non-existence or emptiness, which it checks, it
8155 could not run './exim', it was installing it with an empty version number,
8156 i.e. as "exim-". This error state is now caught, and the installation is
8159 38. An argument was missing from the function that creates an error message
8160 when Exim fails to connect to the socket for saslauthd authentication.
8161 This could cause Exim to crash, or give a corrupted message.
8163 39. Added isip, isip4, and isip6 to ${if conditions.
8165 40. The ACL variables $acl_xx are now saved with the message, and can be
8166 accessed later in routers, transports, and filters.
8168 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8169 strings in the file are not string-expanded.
8171 42. If a MAIL command specified a SIZE value that was too large to fit into an
8172 int variable, the check against message_size_limit failed. Such values are
8173 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8174 day this will have to be increased, but I don't think I want to be around
8175 when emails are that large.
8182 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8183 iconv() is not standard in FreeBSD.
8185 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8186 IPv6 enabled. The observed symptom was a segmentation fault on return from
8187 the function os_common_find_running_interfaces() in src/os.c.
8189 3. In the check_special_case() function in daemon.c I had used "errno" as an
8190 argument name, which causes warnings on some systems. This was basically a
8191 typo, since it was named "eno" in the comments!
8193 4. The code that waits for the clock to tick (at a resolution of some fraction
8194 of a second) so as to ensure message-id uniqueness was always waiting for
8195 at least one whole tick, when it could have waited for less. [This is
8196 almost certainly not relevant at current processor speeds, where it is
8197 unlikely to ever wait at all. But we try to future-proof.]
8199 5. The function that sleeps for a time interval that includes fractions of a
8200 second contained a race. It did not block SIGALRM between setting the
8201 timer, and suspending (a couple of lines later). If the interval was short
8202 and the sigsuspend() was delayed until after it had expired, the suspension
8203 never ended. On busy systems this could lead to processes getting stuck for
8206 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8207 process, before it forks any delivery processes. The open lookup caching
8208 mechanism meant that the open file or database connection was passed into
8209 the delivery process. The problem was that delivery processes always tidy
8210 up cached lookup data. This could cause a problem for the next delivery
8211 process started by the queue runner, because the external queue runner
8212 process does not know about the closure. So the next delivery process
8213 still has data in the lookup cache. In the case of a file lookup, there was
8214 no problem because closing a file descriptor in a subprocess doesn't affect
8215 the parent. However, if the lookup was caching a connection to a database,
8216 the connection was closed, and the second delivery process was likely to
8217 see errors such as "PGSQL: query failed: server closed the connection
8218 unexpectedly". The problem has been fixed by closing all cached lookups
8219 in a queue runner before running a delivery process.
8221 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8222 seem to have the "const" qualifier which it has on other OS. I've
8225 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8226 *of the same type* (client or server) with the same public name that an
8227 error should be diagnosed.
8229 9. When Exim looked up a host name for an IP address, but failed to find the
8230 original IP address when looking up the host name (a safety check), it
8231 output the message "<ip address> does not match any IP for NULL", which was
8232 confusing, to say the least. The bug was that the host name should have
8233 appeared instead of "NULL".
8235 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8236 user that is built into the binary, and the -C or -D options is used, root
8237 privilege is dropped before the configuration file is read. In addition,
8238 logging is switched to stderr instead of the normal log files. If the
8239 configuration then re-defines the Exim user, the unprivileged environment
8240 is probably not what is expected, so Exim logs a panic warning message (but
8243 However, if deliver_drop_privilege is set, the unprivileged state may well
8244 be exactly what is intended, so the warning has been cut out in that case,
8245 and Exim is allowed to try to write to its normal log files.
8251 1. smtp_return_error_details was not giving details for temporary sender
8252 or receiver verification errors.
8254 2. Diagnose a configuration error if two authenticators have the same public
8257 3. Exim used not to create the message log file for a message until the first
8258 delivery attempt. This could be confusing when incoming messages were held
8259 for policy or load reasons. The message log file is now created at the time
8260 the message is received, and an initial "Received" line is written to it.
8262 4. The automatically generated man page for command line options had a minor
8263 bug that caused no ill effects; however, a more serious problem was that
8264 the procedure for building the man page automatically didn't always
8265 operate. Consequently, release 4.20 contains an out-of-date version. This
8266 shouldn't happen again.
8268 5. When building Exim with embedded Perl support, the script that builds the
8269 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8270 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8272 6. The freeze_tell option was not being used for messages that were frozen on
8273 arrival, either by an ACL or by local_scan().
8275 7. Added the smtp_incomplete_transaction log selector.
8277 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8278 was accepting AUTH without a new EHLO.
8280 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8281 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8284 10. Logging of TCP/IP connections (when configured) now happens in the main
8285 daemon process instead of the child process, so that the TCP/IP connection
8286 count is more accurate (but it can never be perfect).
8288 11. The use of "drop" in a nested ACL was not being handled correctly in the
8289 outer ACL. Now, if condition failure induced by the nested "drop" causes
8290 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8291 or "require"), the connection is dropped.
8293 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8294 that yield "discard" can now be used with an "accept" or a "discard" verb,
8295 but an error is generated for any others (because I can't see a useful way
8296 to define what should happen).
8298 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8299 are now processed in the same way as lines in the Exim configuration file.
8300 In particular, continuation lines are supported.
8302 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8304 15. Added -ti meaning -t -i.
8306 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8307 domains, and warn by logging if others are found.
8309 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8310 returned from GIFCONF when Exim is trying to find the list of interfaces on
8311 a host. The code in os.c has been modified to copy each ifreq to an aligned
8312 structure in all cases.
8314 Also, in some cases, the returned ifreq's were being copied to a 'struct
8315 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8316 means the last couple of bytes of an IPv6 address could be chopped if the
8317 ifreq contained only a normal sockaddr (14 bytes storage).
8319 18. Named domain lists were not supported in the hosts_treat_as_local option.
8320 An entry such as +xxxx was not recognized, and was treated as a literal
8323 19. Ensure that header lines added by a DATA ACL are included in the reject log
8324 if the ACL subsequently rejects the message.
8326 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8327 MD5 (which is deprecated).
8329 21. When testing a filter file using -bf, Exim was writing a message when it
8330 took the sender from a "From " line in the message, but it was not doing so
8331 when it took $return_path from a Return-Path: header line. It now does.
8333 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8334 with a valid header line field name (a series of printing characters
8335 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8337 23. Changed "disc" in the source to "disk" to conform to the documentation and
8338 the book and for uniformity.
8340 24. Ignore Sendmail's -Ooption=value command line item.
8342 25. When execve() failed while trying to run a command in a pipe transport,
8343 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8344 could be confused with a return value of 69 from the command itself. This
8345 has been changed to 127, the value the shell returns if it is asked to run
8346 a non-existent command. The wording for the related log line suggests a
8347 non-existent command as the problem.
8349 26. If received_header_text expands to an empty string, do not add a Received:
8350 header line to the message. (Well, it adds a token one on the spool, but
8351 marks it "old" so that it doesn't get used or transmitted.)
8353 27. Installed eximstats 1.28 (addition of -nt option).
8355 28. There was no check for failure on the call to getsockname() in the daemon
8356 code. This can fail if there is a shortage of resources on the system, with
8357 ENOMEM, for example. A temporary error is now given on failure.
8359 29. Contrary to the C standard, it seems that in some environments, the
8360 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8361 program. Exim now does this explicitly; it affects the formatting of
8362 timestamps using strftime().
8364 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8365 complaints. I've now initialized all the variables, to avoid this.
8367 32. Header lines added by a system filter were not being "seen" during
8368 transport-time rewrites.
8370 33. The info_callback() function passed to OpenSSL is set up with type void
8371 (*)(SSL *, int, int), as described somewhere. However, when calling the
8372 function (actually a macro) that sets it up, the type void(*)() is
8373 expected. I've put in a cast to prevent warnings from picky compilers.
8375 34. If a DNS black list lookup found a CNAME record, but there were no A
8376 records associated with the domain it pointed at, Exim crashed.
8378 35. If a DNS black list lookup returned more than one A record, Exim ignored
8379 all but the first. It now scans all returned addresses if a particular IP
8380 value is being sought. In this situation, the contents of the
8381 $dnslist_value variable are a list of all the addresses, separated by a
8384 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8385 to accept a host name and all its aliases if the forward lookup for any of
8386 them yielded the IP address of the incoming connection. Now it accepts only
8387 those names whose forward lookup yields the correct IP address. Any other
8388 names are discarded. This closes a loophole whereby a rogue DNS
8389 administrator could create reverse DNS records to break through a
8390 wildcarded host restriction in an ACL.
8392 37. If a user filter or a system filter that ran in a subprocess used any of
8393 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8394 the wrong values were passed to the pipe command ($thisaddress had the
8395 value of $0, $0 had the value of $1, etc). This bug was introduced by
8396 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8398 38. Improved the line breaking for long SMTP error messages from ACLs.
8399 Previously, if there was no break point between 40 and 75 characters, Exim
8400 left the rest of the message alone. Two changes have been made: (a) I've
8401 reduced the minimum length to 35 characters; (b) if it can't find a break
8402 point between 35 and 75 characters, it looks ahead and uses the first one
8403 that it finds. This may give the occasional overlong line, but at least the
8404 remaining text gets split now.
8406 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8407 file descriptors might be low, and that setting 1000 would always raise it.
8408 It turns out that in some environments, the limit is already over 1000 and
8409 that lowering it causes trouble. So now Exim takes care not to decrease it.
8411 40. When delivering a message, the value of $return_path is set to $sender_
8412 address at the start of routing (routers may change the value). By an
8413 oversight, this default was not being set up when an address was tested by
8414 -bt or -bv, which affected the outcome if any router or filter referred to
8417 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8418 log only when "message" or "log_message" are set. However, if one of the
8419 conditions was an address verification, or a call to a nested ACL, the
8420 messages generated by the underlying test were being passed through. This
8421 no longer happens. The underlying message is available in $acl_verify_
8422 message for both "message" and "log_message" expansions, so it can be
8423 passed through if needed.
8425 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8426 new expansion $bh_ to give the encoded byte string without charset
8427 translation. Translation happens only if iconv() is available; HAVE_ICONV
8428 indicates this at build time. HEADERS_CHARSET gives the charset to
8429 translate to; headers_charset can change it in the configuration, and
8430 "headers charset" can change it in an individual filter file.
8432 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8433 that creates RFC 2047 encoded "words" labels them as that charset instead
8434 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8435 expansion operator; (ii) when Exim creates a From: line for a local
8436 message; (iii) when a header line is rewritten to include a "phrase" part.
8438 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8439 buggy, causing it to skip the first lines of messages whose message ID
8440 ended in 'D'. This would not have bitten before Exim release 4.14, because
8441 message IDs were unlikely to end in 'D' before then. The effect was to have
8442 incorrect size information for certain domains.
8444 45. #include "config.h" was missing at the start of the crypt16.c module. This
8445 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8448 46. If there was a timeout during a "random" callout check, Exim treated it as
8449 a failure of the random address, and carried on sending RSET and the real
8450 address. If the delay was just some slowness somewhere, the response to the
8451 original RCPT would be taken as a response to RSET and so on, causing
8452 mayhem of various kinds.
8454 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8455 when I implemented it. It didn't allow for the fact that some option values
8456 may legitimately be negative (e.g. size_addition), and it didn't even do
8457 the right test for positive values.
8459 48. Domain names in DNS records are case-independent. Exim always looks them up
8460 in lower case. Some resolvers return domain names in exactly the case they
8461 appear in the zone file, that is, they may contain uppercase letters. Not
8462 all resolvers do this - some return always lower case. Exim was treating a
8463 change of case by a resolver as a change of domain, similar to a widening
8464 of a domain abbreviation. This triggered its re-routing code and so it was
8465 trying to route what was effectively the same domain again. This normally
8466 caused routing to fail (because the router wouldn't handle the domain
8467 twice). Now Exim checks for this case specially, and just changes the
8468 casing of the domain that it ultimately uses when it transmits the message
8471 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8474 50. If a filter generated a file delivery with a non-absolute name (possible if
8475 no home directory exists for the router), the forbid_file option was not
8478 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8479 the existing equality matching.
8481 52. Exim was using ints instead of ino_t variables in some places where it was
8482 dealing with inode numbers.
8484 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8485 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8486 called TMPDIR, and if it finds it is different, it changes its value.
8488 54. The smtp_printf() function is now made available to local_scan() so
8489 additional output lines can be written before returning. There is also an
8490 smtp_fflush() function to enable the detection of a dropped connection.
8491 The variables smtp_input and smtp_batched_input are exported to
8494 55. Changed the default runtime configuration: the message "Unknown user"
8495 has been removed from the ACL, and instead placed on the localuser router,
8496 using the cannot_route_message feature. This means that any verification
8497 failures that generate their own messages won't get overridden. Similarly,
8498 the "Unrouteable address" message that was in the ACL for unverifiable
8499 relay addresses has also been removed.
8501 56. Added hosts_avoid_esmtp to the smtp transport.
8503 57. The exicyclog script was not checking for the esoteric option
8504 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8505 will work only if exicyclog is run under the appropriate euid.
8507 58. Following a discussion on the list, the rules by which Exim recognises line
8508 endings on incoming messages have been changed. The -dropcr and drop_cr
8509 options are now no-ops, retained only for backwards compatibility. The
8510 following line terminators are recognized: LF CRLF CR. However, special
8511 processing applies to CR:
8513 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8514 nor a local message in the state where . is a terminator.
8516 (ii) If a bare CR is encountered in a header line, an extra space is added
8517 after the line terminator so as not to end the header. The reasoning
8518 behind this is that bare CRs in header lines are most likely either
8519 to be mistakes, or people trying to play silly games.
8521 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8522 was being incorrectly given as 18 bytes larger than it should have been.
8523 This is a VOB (very old bug).
8525 60. This may never have affected anything current, but just in case it has:
8526 When the local host is found other than at the start of a list of hosts,
8527 the local host, those with the same MX, and any that follow, are discarded.
8528 When the list in question was part of a longer list of hosts, the following
8529 hosts (not currently being processed) were also being discarded. This no
8530 longer happens. I'm not sure if this situation could ever has previously
8533 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8536 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8537 header. This is something that is recommended in a new Internet Draft, and
8538 is something that is documented as being done by Sendmail. There are two
8539 possible values. For messages generated by the autoreply transport, Exim
8542 Auto-Submitted: auto-replied
8544 whereas for all other generated messages (e.g. bounces) it adds
8546 Auto-Submitted: auto-generated
8548 63. The "personal" condition in filters now includes a test for the
8549 Auto-Submitted: header. If it contains the string "auto-" the message it
8550 not considered personal.
8552 64. Added rcpt_include_affixes as a generic transport option.
8554 65. Added queue_only_override (default true).
8556 66. Added the syslog_duplication option.
8558 67. If what should have been the first header line of a message consisted of
8559 a space followed by a colon, Exim was mis-interpreting it as a header line.
8560 It isn't of course - it is syntactically invalid and should therefore be
8561 treated as the start of the message body. The misbehaviour could have
8562 caused a number of strange effects, including loss of data in subsequent
8563 header lines, and spool format errors.
8565 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8566 client host had authenticated. This control can now be exercised by an ACL
8567 for more flexibility.
8569 69. By default, callouts do not happen when testing with -bh. There is now a
8570 variant, -bhc, which does actually run the callout code, including
8571 consulting and updating the callout cache.
8573 70. Added support for saslauthd authentication, courtesy of Alexander
8576 71. If statvfs() failed on the spool or log directories while checking their
8577 size for availability, Exim confusingly gave the error "space shortage".
8578 Furthermore, in debugging mode it crashed with a floating point exception.
8579 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8580 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8581 serious problem, Exim now writes to the main and panic logs when this
8582 happens, with details of the failure. It then refuses to accept the
8583 incoming message, giving the message "spool directory problem" or "log
8584 directory problem" with a 421 code for SMTP messages.
8586 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8587 0, 1, and 2 exist, because some OS complain for execs without them (see
8588 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8589 descriptors. However, the code omitted to check that the open succeeded,
8590 causing mysterious errors if for some reason the permissions on /dev/null
8591 got screwed. Now Exim writes a message to the main and panic logs, and
8592 bombs out if it can't open /dev/null.
8594 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8595 interact so that it is all more flexible. It is supposed to remain
8596 backwards compatible. Also added extra_local_interfaces.
8598 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8599 to bomb out with an assertion failure - to the client this appears as a
8600 connection drop. This problem occurs in the part of the code that was taken
8601 from the Samba project. Fortunately, the assertion is in a very simple
8602 function, so I have fixed this by reproducing the function inline in the
8603 one place where it is called, and arranging for authentication to fail
8604 instead of killing the process with assert().
8606 75. The SPA client code was not working when the server requested OEM rather
8607 than Unicode encoding.
8609 76. Added code to make require_files with a specific uid setting more usable in
8610 the case where statting the file as root fails - usually a non-root-mounted
8611 NFS file system. When this happens and the failure is EACCES, Exim now
8612 forks a subprocess and does the per-uid checking as the relevant uid.
8614 77. Added process_log_path.
8616 78. If log_file_path was not explicitly set, a setting of check_log_space or
8617 check_log_inodes was ignored.
8619 79. If a space check for the spool or log partitions fails, the incident is now
8620 logged. Of course, in the latter case the data may get lost...
8622 80. Added the %p formatting code to string_format() so that it can be used to
8623 print addresses in debug_print(). Adjusted all the address printing in the
8624 debugging in store.c to use %p rather than %d.
8626 81. There was a concern that a line of code in smtp_in.c could overflow a
8627 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8628 initially expressed, the concern was not well-founded, because trailing
8629 spaces are removed early. However, if the trailing spaces were followed by
8630 a NULL, they did not get removed, so the overflow was possible. Two fixes
8633 (a) I re-wrote the offending code in a cleaner fashion.
8634 (b) If an incoming SMTP command contains a NULL character, it is rejected
8637 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8638 runs initgroups(), so that if the Exim user is in any additional groups,
8639 they will be used during message reception.
8645 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob