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 broking this, giving only
84 a 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 vriable
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..
125 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
126 SMTP connection" log lines.
128 JH/02 Option default value updates:
129 - queue_fast_ramp (main) true (was false)
130 - remote_max_parallel (main) 4 (was 2)
132 JH/03 Cache static regex pattern compilations, for use by ACLs.
134 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
135 Make the rewrite never match and keep the logging. Trust the
136 admin to be using verify=header-syntax (to actually reject the message).
138 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
139 (under Linux) we watch the dir containing the final file; previously
140 it would be the dir with the first symlink. We still do not monitor
143 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
144 dn_expand() is happy to pass them through.
146 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
147 the file with the proof had an unchanged name, the new proof(s) were
148 loaded on top of the old ones (and nover used; the old ones were stapled).
150 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
151 more than one message arrived in a single connection a reference from
152 the earlier message could be re-used. Often a sigsegv resulted.
153 These variables were introduced in Exim 4.87.
154 Debug help from Graeme Fowler.
156 JH/09 Fix ${filter } for conditions that modify $value. Previously the
157 modified version would be used in construction the result, and a memory
160 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
161 Find and fix by Jasen Betts.
163 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
164 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
165 the systemwide configuration to override the Exim config.
167 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
168 API changes in libopendmarc.
170 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
171 pid 1, in the normal "background daemon" mode, having to drop process-
172 group leadership also lost track of needing to create listener sockets.
174 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
175 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
177 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
178 a capture group which obtained no text (eg. "(abc)*" matching zero
179 occurrences) could cause a segfault if the corresponding $<n> was
182 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
183 included a close-brace character (eg. it itself used an expansion) an
186 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
187 starting TLS. Previously it was after, meaning that attackers on such
188 ports had to be screened using the host_reject_connection main config
189 option. The new sequence aligns better with the STARTTLS behaviour, and
190 permits defences against crypto-processing load attacks, even though it
191 is strictly an incompatible change.
192 Also, avoid sending any SMTP fail response for either the connect ACL
193 or host_reject_connection, for TLS-on-connect ports.
195 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
196 Previously this was not permitted, but it makes reasonable sense.
197 While there, restore a restriction on using it from a connect ACL; given
198 the change JH/16 it could only return false (and before 4.91 was not
201 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
202 was exactly sized compared to the log buffer, a crash occurred with the
203 misleading message "bad memory reference; pool not found".
204 Found and traced by Jasen Betts.
206 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
207 dns_again_means_nonexist included an element causing a DNS lookup which
208 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
209 included (though probably not limited to) a process crash from stack
210 memory limit, or from excessive open files. Replace this with a paniclog
211 whine (as this is likely a configuration error), and returning
214 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
215 this always failed, probably leading to the usual downgrade to in-clear
218 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
219 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
220 to not checking that list for these lookups.
222 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
225 JH/23 Fix crash in string expansions. Previously, if an empty variable was
226 immediately followed by an expansion operator, a null-indirection read
227 was done, killing the process.
229 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
230 include an SMTP response string which is longer than that supported
231 by the delivering transport. Alleviate by wrapping such lines before
234 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
235 chars (RFC limit). Previously a limit of 12 items was made, which with
236 a not-impossible References: in the message being bounced could still
237 be over-large and get stopped in the transport.
239 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
240 close. Previously a bare socket close was done.
242 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
245 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
246 message being considered for delivery was already being handled by
247 another process, and having an SMTP connection already open, the function
248 to close it tried to use an uninitialized variable. This would afftect
249 high-volume sites more, especially when running mailing-list-style loads.
250 Pollution of logs was the major effect, as the other process delivered
251 the message. Found and partly investigated by Graeme Fowler.
253 JH/29 Change format of the internal ID used for message identification. The old
254 version only supported 31 bits for a PID element; the new 64 (on systems
255 which can use Base-62 encoding, which is all currently supported ones
256 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
257 and must use Base-36). The new ID is 23 characters rather than 16, and is
258 visible in various places - notably logs, message headers, and spool file
259 names. Various of the ancillary utilities also have to know the format.
260 As well as the expanded PID portion, the sub-second part of the time
261 recorded in the ID is expanded to support finer precision. Theoretically
262 this permits a receive rate from a single comms channel of better than the
264 The major timestamp part of the ID is not changed; at 6 characters it is
265 usable until about year 3700.
266 Updating from previously releases is fully supported: old-format spool
267 files are still usable, and the utilities support both formats. New
268 message will use the new format. The one hints-DB file type which uses
269 message-IDs (the transport wait- DB) will be discarded if an old-format ID
270 is seen; new ones will be built with only new-format IDs.
271 Optionally, a utility can be used to convert spool files from old to new,
272 but this is only an efficiency measure not a requirement for operation
273 Downgrading from new to old requires running a provided utility, having
274 first stopped all operations. This will convert any spool files from new
275 back to old (losing time-precision and PID information) and remove any
276 wait- hints databases.
278 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
279 we treated them as item separators when parsing for a list item, but they
280 need to be protected by the doublequotes. While there, add handling for
283 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
284 Found and fixed by Jasen Betts. No testcase for this as my usual text
285 editor insists on emitting only valid UTF-8.
287 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
288 a null-indirection SIGSEGV for the receive process.
290 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
291 -bh use. Internal checking would spot this and take a panic.
293 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
294 In 4.96 this would expand to empty.
296 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
297 certificate. Find and fix by Andreas Metzler.
299 JH/36 Add ARC info to DMARC hostory records.
301 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
302 or fakedefer. Previously the sender could discover that the message
303 had in fact been accepted.
305 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
306 sequences. Previously the input was not noted as being tainted; notably
307 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
308 bad coding of authenticators.
310 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
311 and ${tr...}. Found and diagnosed by Heiko Schlichting.
313 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
314 could be triggered by externally-supplied input. Found by Trend Micro.
317 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
318 be triggered by externally-controlled input. Found by Trend Micro.
321 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
322 be triggered by externally-controlled input. Found by Trend Micro.
325 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
326 Make the rewrite never match and keep the logging. Trust the
327 admin to be using verify=header-syntax (to actually reject the message).
329 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
332 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
338 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
339 after reception to before a subsequent reception. This should
340 mean slightly faster delivery, and also confirmation of reception
343 JH/02 Move from using the pcre library to pcre2. The former is no longer
344 being developed or supported (by the original developer).
346 JH/03 Constification work in the filters module required a major version
347 bump for the local-scan API. Specifically, the "headers_charset"
348 global which is visible via the API is now const and may therefore
349 not be modified by local-scan code.
351 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
352 sendfile() didi not account for the way the ClamAV driver code called it.
354 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
355 time check was being done for every character; replace that with one
358 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
359 sent was prefixed with a length byte.
361 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
362 RFC 5321. Previously Dovecot (at least) would log errors during
365 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
366 in 4.61 without a reason logged. Binaries will be bigger, which might
367 matter on diskspace-constrained systems, but debug is easier.
369 JH/09 Fix macro-definition during "-be" expansion testing. The move to
370 write-protected store for macros had not accounted for these runtime
371 additions; fix by removing this protection for "-be" mode.
373 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
374 handing out large-numbered file descriptors, violating the usual Unix
375 assumption (and required by Posix) that the lowest possible number will be
376 allocated by the kernel when a new one is needed. In the daemon, and any
377 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
378 are not useable for FD_SET() [and hence select()] and overwrite the stack.
379 Assorted crashes happen.
381 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
382 main-section options or in a connect ACL, the value from the first ever
383 connection was never replaced for subsequent connections. Found by
386 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
387 though only once PCRE2 was introduced: the memory accounting used under
388 debug offset allocations by an int, giving a hard trap in early startup.
389 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
391 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
392 with underbars is given. The write-protection of configuration introduced
393 in 4.95 trapped when normalisation was applied to an option not needing
396 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
398 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
399 failing to close the certificates directory, every hour or any time it
402 JH/16 Debugging initiated by an ACL control now continues through into routing
403 and transport processes. Previously debugging stopped any time Exim
404 re-execs, or for processing a queued message.
406 JH/17 The "expand" debug selector now gives more detail, specifically on the
407 result of expansion operators and items.
409 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
410 bad comparison between the option value and the name of the file to
411 be included was done, and a mismatch was wrongly identified.
412 4.88 to 4.95 are affected.
414 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
416 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
417 supplied as the db file-pair basename. Previously, if a directory
418 path was given, for example via the autoreply "once" option, the DB
419 file.pag and file.dir files would be created in that directory's
422 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
423 "taint" log_selector. These were previously deprecated.
425 JH/22 Fix static address-list lookups to properly return the matched item.
426 Previously only the domain part was returned.
428 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
429 the call into OpenSSL to send a TLS Close was being repeated; this
430 resulted in the library waiting for the peer's Close. If that was never
431 sent we waited forever. Fix by tracking send calls.
433 JH/24 The ${run} expansion item now expands its command string elements after
434 splitting. Previously it was before; the new ordering makes handling
435 zero-length arguments simpler. The old ordering can be obtained by
436 appending a new option "preexpand", after a comma, to the "run".
438 JH/25 Taint-check exec arguments for transport-initiated external processes.
439 Previously, tainted values could be used. This affects "pipe", "lmtp" and
440 "queryprogram" transport, transport-filter, and ETRN commands.
441 The ${run} expansion is also affected: in "preexpand" mode no part of
442 the command line may be tainted, in default mode the executable name
445 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
446 the the facility was not passed across execs, and only the first message
447 passed over a connection could use BDAT; any further ones using DATA.
449 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
450 uses $sending_ip_address and an interface is specified.
451 Previously any use of the local address in the EHLO name disabled
452 PIPECONNECT, the common case being to use the rDNS of it.
454 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
455 resumption. Previously verify failed because no certificate status is
456 passed on the wire for the restarted session. Fix by using the recorded
457 ocsp status of the stored session for the new connection.
459 JH/29 TLS resumption: the key for session lookup in the client now includes
460 more info that a server could potentially use in configuring a TLS
461 session, avoiding oferring mismatching sessions to such a server.
462 Previously only the server IP was used.
464 JH/30 Fix string_copyn() for limit greater than actual string length.
465 Previously the copied amount was the limit, which could result in a
466 overlapping memcpy for newly allocated destination soon after a
467 source string shorter than the limit. Found/investigated by KM.
469 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
470 close; it may be needed for a subsequent connection. This caused a
471 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
473 JH/32 Fix CHUNKING for a second message on a connection when the first was
474 rejected. Previously we did not reset the chunking-offered state, and
475 erroneously rejected the BDAT command. Investigation help from
478 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
479 an empty address. Previously the expansion returned an error.
481 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
482 proxy. Previously these were misparsed, leading to paniclog entries.
488 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
489 related applications. Previously an "H" was used where available info
490 says that "M" should be, so change to match.
492 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
493 as arguments, so an implementation trying to copy these into a local
494 buffer was taking a taint-enforcement trap. Fix by using dynamically
495 created buffers. Similar fix for radius expansion condition.
497 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
498 reasonable, eg. to count headers. Fix by using dynamically created
499 buffers rather than a local. Do similar fixes for ACL actions "dcc",
500 "log_reject_target", "malware" and "spam"; the arguments are expanded
501 so could be handling tainted values.
503 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
504 broken the (no-op) support for this sendmail command. Restore it
505 to doing nothing, silently, and returning good status.
507 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
508 record path was given (or the default used) without a leading directory
509 path, an error occurred on trying to open it. Use the transport's working
512 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
513 transport. Previously it was the name on the DNS A-record; use instead
514 the head of the CNAME chain leading there (if there is one). This seems
515 to align better with RFC 6125.
517 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
518 smtp_accept_max_per_host allocated resources which were not released
519 when the limit was exceeded. This eventually crashed the daemon. Fix
520 by adding a release action in that path.
522 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
523 expanded; previously using tainted values was rejected. Fix by using
524 dynamically-created buffers.
526 JH/09 Relax restrictions on ACL verify condition needing access to message
527 headers. Previously they were only permitted in data and non-smtp ACLs;
528 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
529 not_blind, header_sender and header_names_ascii verification.
531 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
532 Previously a macro used one argument twice; when called with the
533 argument as an expression having side-effects, incorrect operation
534 resulted. Use an inlineable function.
536 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
537 held open for a verify callout. Previously this wan not accounted for
538 and a corrupt onward SMTP conversation resulted.
540 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
541 Previously they were embedded naively in the constructed address; when
542 needed, strip the quoting and quote the entire local_part.
543 Also make the inbound_srs expansion condition handle quoting.
545 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
546 excluded, not matching the documentation.
548 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
549 was given for the sqlite_dbfile a trap resulted.
551 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
552 "name" argument resulted in a trap. There is no reason to disallow such;
553 this was a coding error.
555 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
556 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
557 spent suspended, ignoring the POSIX definition. Previously we assumed
558 it did and a constant offset from real time could be used as a correction.
559 Change to using the same clock source for the start-of-message and the
560 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
561 exists, just to get a clock slightly more aligned to reality.
563 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
564 RFC says it is optional some validators care. The missing char was not
565 intended but triggered by a line-wrap alignment. Discovery and fix by
566 Guillaume Outters, hacked on by JH.
568 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
569 name being quoted was tainted a trap would be taken. Fix by using
570 dynamically created buffers. The routine could have been called by a
571 rewrite with the "h" flag, by using the "-F" command-line option, or
572 by using a "name=" option on a control=submission ACL modifier.
574 JH/19 SPF: change the Authentication-Results expansion component to give
575 smtp.helo when the sender domain is empty. Previously it gave
578 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
579 not in 127.0.0.0/8 to help in spotting list domains taken over by a
580 domain-parking registrar.
582 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
583 Previously when a whitespace character was specified it was not inserted
584 after removing the newline.
586 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
587 the domain part of the recipient address. This overrides any tls_sni
588 option set, which was previously used.
590 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
593 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
594 is_tainted() had an off-by-one error in the overenthusiastic direction.
595 Find and fix by Gavan. Although NetBSD is not a supported platform for
596 4.94 this bug could affect other platforms.
598 PP/01 Fix default prime selection to be consistent.
599 One path used ike23 still, instead of exim.dev.20160529.3; now both
600 execution flows will use the same DH primes (currently
601 exim.dev.20160529.3).
603 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
604 option in smtp transport, to match the documentation. Previously
605 verification was not being done in some cases where it should have been.
607 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
608 than one server was defined and depending on the platform memory layout
609 details, an internal consistency trap could be hit while walking the list
612 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
613 files. The value is used by the authresults expansion item. Previously
614 if this was used in a router or transport, a crash could result.
616 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
617 have a sufficient incidence of EINTR returns from select that an
618 interaction with other operations done by the main daemon loop exposed
619 a bug in the error-handling. This was benign apart from the log
622 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
623 for consistency with delivered "=>" and failed "**" lines. While we're
624 there, handle PRX and TFO.
626 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
627 applied. This resulted, if any header-line rewrite rules were configured,
628 in a panic-log triggerable by sending a message with a long address in
629 a header. Fix by increasing the arbitrary limit to larger than a single
630 (dewrapped) 5322 header line maximum size.
632 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
633 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
634 RFC 6648 which deprecates X- options in protocols as a general practice.
635 Changeover between the implementations is handled by the mechanisms
638 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
639 a remote which uses callout/hold. Previously the local was queued.
641 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
644 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
645 log line. The asterisk is now consistently appended to the remote IP
646 (and port, if given), and will also be provided on defer and fail log
647 lines. Previously it could be placed on the local IP if that was being
648 logged, and was only provided on delivery lines.
650 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
652 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
653 authenticator client_send option. Previously the next char, after a pair
654 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
655 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
656 documentation. There is still no way to get a leading ^ immediately
657 after a NUL (ie. for the password of a PLAIN method authenticator.
659 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
660 files. For bad sizes read, delete the record and whine to paniclog.
662 JH/38 When logging an AUTH failure, as server, do not include sensitive
663 information. Previously, the credentials would be included if given
664 as part of the AUTH command line and an ACL denied authentication.
666 JH/39 Bug 2691: fix $local_part_data. When the matching list element
667 referred to a file, bad data was returned. This likely also affected
670 JH/40 The gsasl authenticator now supports caching of the salted password
671 generated by the client-side implementation. This required the addition
672 of a new variable: $auth4.
674 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
675 left undeleted; the attempt to re-create it then failed - resulting in
676 the usual "SIGHUP tp have daemon reload configuration" to not work.
677 This affected any platform not supporting "abstract" Unix-domain
678 sockets (i.e. not Linux).
680 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
681 recipients" response to RCPT in a later response, with a 250. The
682 previous coding assumed this would not happen, and under PIPELINING
683 would result in both lost and duplicate recipients for a message.
685 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
686 Previously the weighting was incorrectly applied. Similar fix for socks
687 proxies. Found and fixed by Heiko Schlichting.
689 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
690 not handle sub-lists included using the +namedlist syntax. While
691 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
692 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
695 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
696 Previously the permanent pool was used, so the sore could not be freed.
697 This meant a connection with many messages would use continually-growing
700 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
701 per-pool so as not to waste too much space. Previously a constant size
702 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
703 DOS attacks harder. The cost is wasted memory use in the larger blocks.
705 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
706 same space repeatedly, and a smaller process footprint.
708 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
709 for GnuTLS. Previously the name started "%s" which, while not a bug,
710 looked as if if might be one.
712 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
713 "continued connection") make the $proxy_* variables available. Previously
714 the information was not passed across the exec() call for subsequent
715 transport executions. This also mean that the log lines for the
716 messages can show the proxy information.
718 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
719 receive time. With modern systems the difference is significant.
720 The historical behaviour can be restored by disabling (a new) log_selector
721 "queue_time_exclusive".
723 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
724 content) were specifically tested for. Now, also cover expansions
725 resulting in ACL names and inline ACL content.
727 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
728 making it unusable in complex expressions.
730 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
731 fail with a taint-check on the spoolfile name, and leave the message
734 HS/01 Enforce absolute PID file path name.
736 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
738 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
740 PP/02 Bug 2643: Correct TLS DH constants.
741 A missing NUL termination in our code-generation tool had led to some
742 incorrect Diffie-Hellman constants in the Exim source.
743 Reported by kylon94, code-gen tool fix by Simon Arlott.
745 PP/03 Impose security length checks on various command-line options.
746 Fixes CVE-2020-SPRSS reported by Qualys.
748 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
749 better. Reported by Qualys.
751 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
752 providing a particularly obnoxious sender full name.
755 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
757 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
760 PP/08 Change default for recipients_max from unlimited to 50,000.
762 PP/09 Fix security issue with too many recipients on a message (to remove a
763 known security problem if someone does set recipients_max to unlimited,
764 or if local additions add to the recipient list).
765 Fixes CVE-2020-RCPTL reported by Qualys.
767 PP/10 Fix security issue in SMTP verb option parsing
768 Fixes CVE-2020-EXOPT reported by Qualys.
770 PP/11 Fix security issue in BDAT state confusion.
771 Ensure we reset known-good where we know we need to not be reading BDAT
772 data, as a general case fix, and move the places where we switch to BDAT
773 mode until after various protocol state checks.
774 Fixes CVE-2020-BDATA reported by Qualys.
776 HS/03 Die on "/../" in msglog file names
778 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
779 the Exim runtime user are allowed to create files.
781 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
784 QS/03 When reading the output from interpreted forward files we do not
785 pass the pipe between the parent and the interpreting process to
786 executed child processes (if any).
788 QS/04 Always die if requested from internal logging, even is logging is
791 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
792 the API; compilation noo longer completes with DMARC support included.
793 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
794 been reported on other platforms.
796 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
798 JH/56 Make the majority of info read from config files readonly, for defence-in-
799 depth against exploits. Suggestion by Qualys.
800 Not supported on Solaris 10.
802 JH/57 Fix control=fakreject for a custom message containing tainted data.
803 Previously this resulted in a log complaint, due to a re-expansion present
804 since fakereject was originally introduced.
806 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
807 modifier was given, a loop resulted.
809 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
810 pipelined SMTP command followed the BDAT LAST then it would be
811 incorrectly treated as part of the message body, causing a verification
814 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
815 require looser validation rules than those for 821-level addresses,
816 which only permit IP addresses.
822 JH/01 Avoid costly startup code when not strictly needed. This reduces time
823 for some exim process initialisations. It does mean that the logging
824 of TLS configuration problems is only done for the daemon startup.
826 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
828 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
829 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
832 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
833 DKIM signing is being done. Previously a transport_filter would always
834 disable CHUNKING, falling back to traditional DATA.
836 JH/05 Regard command-line recipients as tainted.
838 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
840 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
841 PAM library frees one of the arguments given to it, despite the
842 documentation. Therefore a plain malloc must be used.
844 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
845 on-stack buffers were used, resulting in a taint trap when DSN information
846 copied from a received message was written into the buffer.
848 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
849 the ordering of its ARC headers. This caused a crash.
851 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
852 a new record was being constructed with information from the peer, a trap
855 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
856 installation would get error messages from DMARC verify, when it hit the
857 nonexistent file indicated by the default. Distros wanting DMARC enabled
858 should both provide the file and set the option.
859 Also enforce no DMARC verification for command-line sourced messages.
861 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
862 could, depending on the platform, hang at the STARTTLS response.
864 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
865 message on a connection. Previously if one message had ARC headers and
866 the following one did not, a crash could result when adding an
867 Authentication-Results: header.
869 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
870 Exim main code and Exim-related utities. The introduction of taint
871 tracking also did many adjustments to string handling. Since then, eximon
872 frequently terminated with an assert failure.
874 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
875 check for 452 responses. This slightly helps the inefficieny of doing
876 a large alias-expansion into a recipient-limited target. The max_rcpt
877 transport option still applies (and at the current default, will override
878 the new feature). The check is done for either cause of synch, and forces
879 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
880 connection. The new facility is not tunable at this time.
882 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
883 library live data was being used, so the results became garbage. Make
884 copies while it is still usable.
886 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
887 on delivery deferred (==) and failed (**) lines (if a delivery was
888 attemtped). Previously it was only on completion (=>) lines.
890 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
891 for the expansion of the server_scram_iter and server_scram_salt options.
893 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
894 are now specifically given a NO_DATA response without hitting the system
895 resolver. The library goes on to do the now-standard TXT lookup.
896 Use of dnsdb lookups is not affected.
898 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
899 only retrieve the errormessage once. Previously two calls to dlerror()
900 were used, and the second one (for mainlog/paniclog) retrieved null
903 JH/20 Taint checking: disallow use of tainted data for
904 - the appendfile transport file and directory options
905 - the pipe transport command
906 - the autoreply transport file, log and once options
907 - file names used by the redirect router (including filter files)
909 - paths used by single-key lookups
910 Previously this was permitted.
912 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
913 adjusted the size of a major service buffer; this failed because the
914 buffer was in use at the time. Change to a compile-time increase in the
915 buffer size, when this authenticator is compiled into exim.
917 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
918 previous fast-mode was untenable in the face of glibs using mmap to
919 support larger malloc requests.
921 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
922 New values supported, if defined on system where compiled:
923 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
924 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
926 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
927 running a limited number of proceses in parallel, a benefit is gained. The
928 amount varies with the platform hardware and load. The use of the option
929 queue_run_in_order means we cannot do this, as ordering becomes
932 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
933 had introduced a string-copy (for ensuring NUL-termination) which was not
934 appropriate for that case, which can include embedded NUL bytes in the
935 block of data. Investigation showed the copy to actually be needless, the
936 data being length-specified.
938 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
939 done during a receiving connection, and both used TLS, global info was
940 used rather than per-connection info for tracking the state of data
941 queued for transmission. This could result in a connection hang.
943 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
944 Previously, when delivering serveral messages down a single connection
945 only the first would provide a SIZE. This was due to the size information
946 not being properly tracked.
948 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
949 TAI (at 37 seconds currently), pretend to be in UTC for time-related
950 expansion and logging. Previously, spurious values such as a future
951 minute could be seen.
953 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
954 it could crash from a null-deref. This could also affect the
955 ${addresses: } operator and ${readsock } item.
957 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
958 message following a mime one, the variable was not reset.
960 JH/30 When an pipelined-connect fails at the first response, assume incorrect
961 cached capability (perhaps the peer reneged?) and immediately retry in
964 JH/31 Fix spurious detection of timeout while writing to transport filter.
966 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
967 an attempt to copy the string was made before checking it.
969 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
970 taint of the lookup key was maintained; we now regard the presence in the
971 filesystem as sufficient validation.
973 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
974 argument is supplied.
976 JH/35 The dsearch lookup now requires that the directory is an absolute path.
977 Previously this was not checked, and nonempty relative paths made an
978 access under Exim's current working directory.
980 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
981 Previously no event was raised.
983 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
984 parameter supplied by the sender MAIL FROM command. Previously it was
985 ignored, and only the check_spool_space option value for the required
988 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
989 the size of the signing public-key. Previously it was instead giving
990 the size of the signature hash.
992 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
993 the default. See the (new) dkim_verify_min_keysizes option.
995 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
996 and an ACL use a lookup for checking either the local_part or domain,
997 stale data could be accessed. Ensure that variable references are
998 dropped between messages.
1000 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1001 by the client was not checked as pointing within response data before
1002 being used. A malicious client could thus cause an out-of-bounds read and
1003 possibly gain authentication. Fix by adding the check.
1005 JH/42 Internationalisation: change the default for downconversion in the smtp
1006 transport to be "if needed". Previously it was "as previously set" for
1007 the message, which usually meant "if needed" for message-submission but
1008 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1009 even when the envelope addresses did not need it, resulting in forwarding
1010 failures to non-supporting MTAs. A downconvert in such cases will be
1011 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1012 transport. The change does mean that addresses needing conversion will
1013 be converted when previously a delivery failure would occur.
1015 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1016 response was received it would be used unchecked in a fail-DSN, violating
1017 standards on line-length limits. Truncate if needed.
1019 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1020 doesn't work. (Additionally add a new main config option to configure the
1027 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1028 side, to decode a TLS 1.3 packet capture.
1030 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1031 Previously the default library behaviour applied, sending two, each in
1032 its own TCP segment.
1034 JH/03 Debug output for ACL now gives the config file name and line number for
1037 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1039 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1041 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1042 buffer overrun for (non-chunking) other transports.
1044 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1045 TLS1.3, means that a server rejecting a client certificate is not visible
1046 to the client until the first read of encrypted data (typically the
1047 response to EHLO). Add detection for that case and treat it as a failed
1048 TLS connection attempt, so that the normal retry-in-clear can work (if
1049 suitably configured).
1051 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1052 and/or domain. Found and fixed by Jason Betts.
1054 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1055 configuration). If a CNAME target was not a wellformed name pattern, a
1058 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1059 the OS reports them interleaved with other addresses.
1061 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1062 used both for input and for a verify callout, both encrypted, SMTP
1063 responses being sent by the server could be lost. This resulted in
1064 dropped connections and sometimes bounces generated by a peer sending
1067 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1068 string. Previously it was possible to cause undefined behaviour in a
1069 library routine (usually a crash). Found by "zerons".
1071 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1074 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1075 API was removed, so update to use the newer ones.
1077 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1078 any timeout set, is taking a long time. Previously we would hang on to a
1079 rotated logfile "forever" if the input was arriving with long gaps
1080 (a previous attempt to fix addressed lack, for a long time, of initial
1083 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1084 shared (NFS) environment. The length of the tempfile name is now
1085 4 + 16 ("hdr.$message_exim_id") which might break on file
1086 systems which restrict the file name length to lower values.
1087 (It was "hdr.$pid".)
1089 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1090 shared (NFS) environment.
1092 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1093 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1096 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1097 on some platforms for bit 31.
1099 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1100 to changes apparently associated with TLS1.3 handling some of the APIs
1101 previously used were either nonfunctional or inappropriate. Strings
1102 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1103 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1104 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1105 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1106 and the use of specific cipher names in the encrypted= ACL condition.
1108 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1110 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1111 verification result was not updated unless hosts_require_ocsp applied.
1113 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1114 queue_list_requires_admin set to false, non-admin users were denied the
1117 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1118 directory-of-certs mode. Previously they were advertised despite the
1121 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1122 A single TCP connection by a client will now hold a TLS connection open
1123 for multiple message deliveries, by default. Previously the default was to
1126 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1127 default. If built with the facility, DANE will be used. The facility
1128 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1130 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1131 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1132 must be defined and you must still, unless you define DISABLE_TLS, manage
1133 the the include-dir and library-file requirements that go with that
1134 choice. Non-TLS builds are still supported.
1136 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1139 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1140 default. If the platform supports and has the facility enabled, it will
1141 be requested on all coneections.
1143 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1144 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1146 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1148 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1149 success-DSN messages. Previously the From: header was always the default
1150 one for these; the option was ignored.
1152 JH/28 Fix the timeout on smtp response to apply to the whole response.
1153 Previously it was reset for every read, so a teergrubing peer sending
1154 single bytes within the time limit could extend the connection for a
1155 long time. Credit to Qualsys Security Advisory Team for the discovery.
1157 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1158 delivery address, which leaked information of the results of local
1159 forwarding. Change to the original envelope recipient address, per
1162 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1163 requested. Previously not bounce was generated and a log entry of
1164 error ignored was made.
1166 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1168 JH/32 Introduce a general tainting mechanism for values read from the input
1169 channel, and values derived from them. Refuse to expand any tainted
1170 values, to catch one form of exploit.
1172 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1173 was unused and the unexpanded text used for the test. Found and
1174 fixed by Ruben Jenster.
1176 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1177 an attempt to use a TLS library read routine dereffed a nul pointer,
1180 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1181 them in our smtp response.
1183 JH/36 Have the general router option retry_use_local_part default to true when
1184 any of the restrictive preconditions are set (to anything). Previously it
1185 was only for check_local user. The change removes one item of manual
1186 configuration which is required for proper retries when a remote router
1187 handles a subset of addresses for a domain.
1189 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1190 link count into consideration.
1192 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1193 caused the extension of big_buffer, the following lines were ignored.
1195 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1196 accordance with RFC 2308. Previously there was no expiry, so a longlived
1197 receive process (eg. due to ACL delays) versus a short SOA value could
1200 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1202 JH/39 Promote DMARC support to mainline.
1204 JH/40 Bug 2452: Add a References: header to DSNs.
1206 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1207 parameters. The relevant library call is documented as "Deprecated: This
1208 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1209 3.6.0, DH parameters are negotiated following RFC7919."
1211 HS/06 Change the default of dnssec_request_domains to "*"
1213 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1214 carried on and emitted a BDAT command, even when PIPELINING was not
1217 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1218 buffer was used for the filename, resulting in a trap when tainted
1219 arguments (eg. $domain) were used.
1221 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1222 recommended to avoid a possible server-load attack. The feature can be
1223 re-enabled via the openssl_options main cofiguration option.
1225 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1226 for version 4.90 - adding a "more data" boolean to the arguments.
1227 Bumped the ABI version number also, this having been missed previously;
1228 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1229 respect of usage of smtp_printf() by either local_scan code or libraries
1230 accessed via the ${dlfunc } expansion item. Both will need coding
1231 adjustment for any calls to smtp_printf() to match the new function
1232 signature; a FALSE value for the new argument is always safe.
1234 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1235 the file-offset (which the Linux syscall does, and exim expects); this
1236 resulted in an indefinite loop.
1238 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1239 to do ARC verification. The Authentication-Results: header line added
1240 by the configuration then had no ARC item.
1242 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1243 an incorrect mode was used for reading the result, resulting in it being
1250 JH/01 Remove code calling the customisable local_scan function, unless a new
1251 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1253 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1254 non-signal-safe functions being used.
1256 JH/03 Bug 2269: When presented with a received message having a stupidly large
1257 number of DKIM-Signature headers, disable DKIM verification to avoid
1258 a resource-consumption attack. The limit is set at twenty.
1260 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1261 report of oldest_pass in ${authres } in consequence, and separate out
1262 some descriptions of reasons for verification fail.
1264 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1265 files in the spool were present and unlocked. A queue-runner could spot
1266 them, resulting in a duplicate delivery. Fix that by doing the unlock
1267 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1268 add more error-checking on spoolfile handling while that code is being
1271 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1272 No known attacks, no CVE, this is defensive hardening.
1274 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1275 a queue-runner could start a delivery while other operations were ongoing.
1276 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1277 Found and investigated by Tim Stewart. Fix by using the open message data
1278 file handle rather than opening another, and not locally closing it (which
1279 releases a lock) for that case, while creating the temporary .eml format
1280 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1282 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1283 $sender_verify_failure/$recipient_verify_failure to "random".
1285 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1288 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1289 Previously this would segfault.
1291 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1294 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1295 like zero, since the resolver should be doing this for us, But we need one
1296 as a CNAME but no MX presence gets the CNAME returned; we need to check
1297 that doesn't point to an MX to declare it "no MX returned" rather than
1298 "error, loop". A new main option is added so the older capability of
1299 following some limited number of chain links is maintained.
1301 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1303 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1304 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1305 now-deprecated earlier definitions used only specified the range up to TLS
1306 1.2 (in the older-version library docs).
1308 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1310 JH/15 Rework TLS client-side context management. Stop using a global, and
1311 explicitly pass a context around. This enables future use of TLS for
1312 connections to service-daemons (eg. malware scanning) while a client smtp
1313 connection is using TLS; with cutthrough connections this is quite likely.
1315 JH/16 Fix ARC verification to do AS checks in reverse order.
1317 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1319 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1320 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1321 Previously the "utf8" would be re-prepended for every additional message.
1323 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1324 Previously thery were accepted, resulting in issues when attempting to
1325 forward messages to a non-supporting MTA.
1327 PP/02 Let -n work with printing macros too, not just options.
1329 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1330 one parent address was copied, and bogus data was used at delivery-logging
1331 time. Either a crash (after delivery) or bogus log data could result.
1332 Discovery and analysis by Tim Stewart.
1334 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1335 Previously if the string ended mid-character, we did not insert the
1336 promised '?' replacement.
1338 PP/04 Documentation: current string operators work on bytes, not codepoints.
1340 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1341 should pack well giving a smaller memory footprint so better caching and
1342 therefore performance. Group the declarations where this can't be done so
1343 that the byte-sized flag variables are not interspersed among pointer
1344 variables, giving a better chance of good packing by the compiler.
1346 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1347 non-null, to avoid issues with sites running BATV. Previously reports were
1348 sent with an empty envelope sender so looked like bounces.
1350 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1351 The ignore_error flag wasn't being returned from the filter subprocess so
1352 was not set for later routers. Investigation and fix by Matthias Kurz.
1354 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1355 and a msg:complete for the whole, when a message is manually removed using
1356 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1358 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1359 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1360 hope that is portable enough.
1362 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1363 requiring a known-CA anchor certificate; make it now rely entirely on the
1364 TLSA as an anchor. Checking the name on the leaf cert against the name
1365 on the A-record for the host is still done for TA (but not for EE mode).
1367 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1368 included in delivery lines for non-proxied connections, when compiled with
1369 SUPPORT_SOCKS and running with proxy logging enabled.
1371 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1372 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1373 move the existing event to fire before the normal logging of message
1374 failure so that custom logging is bracketed by normal logging.
1376 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1377 msg:fail:internal event. Developement by Matthias Kurz.
1379 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1380 far too small for todays use of crypto signatures stored there. Go all
1381 the way to the max DNS message size of 64kB, even though this might be
1382 overmuch for IOT constrained device use.
1384 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1385 copy a string over itself. The library routine is documented as not
1386 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1388 JH/32 For main options check_spool_space and check_inode_space, where the
1389 platform supports 64b integers, support more than the previous 2^31 kB
1390 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1391 the previous G, M, k.
1393 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1394 $authenticated_fail_id variable on authentication failure. Previously
1397 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1398 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1399 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1400 GNUTLS_SEC_PARAM_MEDIUM.
1402 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1403 side. Previously we would continue as if no SNI had been received.
1405 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1406 "<" character, which should be a list-separator specification, we walked
1407 off past the nul-terimation.
1409 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1410 causes) even when the retry time is not yet met. Previously they were
1411 not, meaning that when (say) an account was over-quota and temp-rejecting,
1412 and multiple senders' messages were queued, only one sender would get
1413 notified on each configured delay_warning cycle.
1415 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1417 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1418 cipher-suites, an error can be left on the stack even for a succeeding
1419 accept; this results in impossible error messages when a later operation
1422 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1423 return error codes indicating retry. Under TLS1.3 this becomes required.
1425 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1426 it only wrote the new authenticators, resulting in a lack of tracking of
1427 peer changes of ESMTP extensions until the next cache flush.
1429 JH/41 Fix the loop reading a message header line to check for integer overflow,
1430 and more-often against header_maxsize. Previously a crafted message could
1431 induce a crash of the recive process; now the message is cleanly rejected.
1433 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1434 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1440 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1441 When redis_servers is set to a list of > 1 element, and the Redis servers
1442 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1443 case of MOVED into a DEFER case instead, thus moving the query onto the
1444 next server in the list. For a cluster of N elements, all N servers must
1445 be defined in redis_servers.
1447 GF/02 Catch and remove uninitialized value warning in exiqsumm
1448 Check for existence of @ARGV before looking at $ARGV[0]
1450 JH/01 Replace the store_release() internal interface with store_newblock(),
1451 which internalises the check required to safely use the old one, plus
1452 the allocate and data copy operations duplicated in both (!) of the
1453 extant use locations.
1455 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1456 modifier. This matches the restriction on the commandline.
1458 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1459 Previously only the last row was returned.
1461 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1462 we assumed that tags in the header were well-formed, and parsed the
1463 element content after inspecting only the first char of the tag.
1464 Assumptions at that stage could crash the receive process on malformed
1467 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1468 While running the DKIM ACL we operate on the Permanent memory pool so that
1469 variables created with "set" persist to the DATA ACL. Also (at any time)
1470 DNS lookups that fail create cache records using the Permanent pool. But
1471 expansions release any allocations made on the current pool - so a dnsdb
1472 lookup expansion done in the DKIM ACL releases the memory used for the
1473 DNS negative-cache, and bad things result. Solution is to switch to the
1474 Main pool for expansions.
1475 While we're in that code, add checks on the DNS cache during store_reset,
1476 active in the testsuite.
1477 Problem spotted, and debugging aided, by Wolfgang Breyha.
1479 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1480 When none of the hosts presented to a transport match an already-open
1481 connection, close it and proceed with the list. Previously we would
1482 queue the message. Spotted by Lena with Yahoo, probably involving
1485 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1486 Previously a spurious "250 OK id=" response was appended to the proper
1489 JH/08 The "support for" informational output now, which built with Content
1490 Scanning support, has a line for the malware scanner interfaces compiled
1491 in. Interface can be individually included or not at build time.
1493 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1494 by the template makefile "src/EDITME". The "STREAM" support for an older
1495 ClamAV interface method is removed.
1497 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1498 rows affected is given instead).
1500 JH/11 The runtime Berkeley DB library version is now additionally output by
1501 "exim -d -bV". Previously only the compile-time version was shown.
1503 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1504 SMTP connection. Previously, when one had more recipients than the
1505 first, an abortive onward connection was made. Move to full support for
1506 multiple onward connections in sequence, handling cutthrough connection
1507 for all multi-message initiating connections.
1509 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1510 routers. Previously, a multi-recipient message would fail to match the
1511 onward-connection opened for the first recipient, and cause its closure.
1513 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1514 a timeout on read on a GnuTLS initiating connection, resulting in the
1515 initiating connection being dropped. This mattered most when the callout
1516 was marked defer_ok. Fix to keep the two timeout-detection methods
1519 JH/15 Relax results from ACL control request to enable cutthrough, in
1520 unsupported situations, from error to silently (except under debug)
1521 ignoring. This covers use with PRDR, frozen messages, queue-only and
1524 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1526 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1527 metadata, resulting in a crash in free().
1529 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1530 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1531 Broken also in d185889f4, with init system revamp.
1533 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1534 Previously we abruptly closed the connection after reading a malware-
1535 found indication; now we go on to read the "scan ok" response line,
1538 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1539 ACL. Previously, a crash would result.
1541 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1542 macro text after a replacement (previously it was only once per line) and
1543 by skipping builtin macros when searching for an uppercase lead character.
1545 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1546 for the build is renamed.
1548 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1549 was allocated for every new TLS startup, meaning one per message. Fix
1550 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1552 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1553 reported the original. Fix to report (as far as possible) the ACL
1554 result replacing the original.
1556 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1557 OpenSSL. Certificate information is loaded for every new TLS startup,
1558 and the resources needed to be freed.
1560 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1562 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1565 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1566 DATA response info to the (existing) per-recipient response info for
1567 the "C=" log element. It can have useful tracking info from the
1568 destination system. Patch from Simon Arlott.
1570 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1571 length value. Previously this would segfault.
1573 HS/02 Support Avast multiline protoocol, this allows passing flags to
1574 newer versions of the scanner.
1576 JH/28 Ensure that variables possibly set during message acceptance are marked
1577 dead before release of memory in the daemon loop. This stops complaints
1578 about them when the debug_store option is enabled. Discovered specifically
1579 for sender_rate_period, but applies to a whole set of variables.
1580 Do the same for the queue-runner and queue-list loops, for variables set
1581 from spool message files. Do the same for the SMTP per-message loop, for
1582 certain variables indirectly set in ACL operations.
1584 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1585 as a multi-recipient message from a mailinglist manager). The coding had
1586 an arbitrary cutoff number of characters while checking for more input;
1587 enforced by writing a NUL into the buffer. This corrupted long / fast
1588 input. The problem was exposed more widely when more pipelineing of SMTP
1589 responses was introduced, and one Exim system was feeding another.
1590 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1591 receiving system, and refused recipients seen by the sending system
1592 (propating to people being dropped from mailing lists).
1593 Discovered and pinpointed by David Carter.
1595 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1596 replaced by the ${authresults } expansion.
1598 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1600 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1601 allows proper process termination in container environments.
1603 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1604 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1606 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1607 and "err_perm", deprecated since 4.83 when the RFC-defined words
1608 "temperror" and "permerror" were introduced.
1610 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1611 transport-filters or DKIM-signing. The restriction was lost in the
1612 consolidation of verify-callout and delivery SMTP handling.
1613 Extend the restriction to also cover ARC-signing.
1615 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1616 in defer=pass mode supply a 450 to the initiator. Previously the message
1619 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1620 tls_require_ciphers is used as before.
1622 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1623 "pass_unscanned". Only tmpfails from the scanner are written to
1624 the paniclog, as they may require admin intervention (permission
1625 denied, license issues). Other scanner errors (like decompression
1626 bombs) do not cause a paniclog entry.
1628 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1629 Previously it was possible to log spurious information in receive log
1632 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1633 triggered odd behaviour from Outlook Express clients.
1635 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1638 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1639 since the IETF WG has not yet settled on that versus the original
1640 "bare" representation.
1642 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1643 Previously the millisecond value corrupted the output.
1644 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1645 corrupted the output.
1651 JH/01 Rework error string handling in TLS interface so that the caller in
1652 more cases is responsible for logging. This permits library-sourced
1653 string to be attached to addresses during delivery, and collapses
1654 pairs of long lines into single ones.
1656 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1657 during configuration. Wildcards are allowed and expanded.
1659 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1660 This permits better logging.
1662 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1663 do not close it down and have the child transport start it up again on
1664 the passed-on TCP connection. Instead, proxy the child (and any
1665 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1666 affected: the continued delivery log lines do not have any DNSSEC, TLS
1667 Certificate or OCSP information. TLS cipher information is still logged.
1669 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1670 identical IP addresses on different listening ports. Will also affect
1673 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1674 add noisy ifdef guards to special-case this sillyness.
1675 Patch from Bernd Kuhls.
1677 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1678 than 255 are no longer allowed.
1680 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1681 Disable the session-cache too, which might reduce our load. Since we
1682 currrectly use a new context for every connection, both as server and
1683 client, there is no benefit for these.
1684 GnuTLS appears to not support tickets server-side by default (we don't
1685 call gnutls_session_ticket_enable_server()) but client side is enabled
1686 by default on recent versions (3.1.3 +) unless the PFS priority string
1689 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1690 <https://reproducible-builds.org/specs/source-date-epoch/>.
1692 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1693 the check for any unsuccessful recipients did not notice the limit, and
1694 erroneously found still-pending ones.
1696 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1697 MSG_MORE. Only in-clear (not on TLS connections).
1699 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1700 transport-filter is involved we can buffer the headers in memory for
1701 creating the signature, and read the spool data file once for the
1702 signature and again for transmission.
1704 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1705 4.77 as the kernel support then wasn't solid, having issues in 64bit
1706 mode. Now, it's been long enough. Add support for FreeBSD also.
1708 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1709 case where the routing stage had gathered several addresses to send to
1710 a host before calling the transport for the first, we previously failed
1711 to close down TLS in the old transport process before passing the TCP
1712 connection to the new process. The new one sent a STARTTLS command
1713 which naturally failed, giving a failed delivery and bloating the retry
1714 database. Investigation and fix prototype from Wolfgang Breyha.
1716 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1717 false-negatives in the check that the sender had not preempted a response
1718 or prompt from Exim (running as a server), due to that code's lack of
1719 awareness of the SMTP input buffering.
1721 PP/04 Add commandline_checks_require_admin option.
1722 Exim drops privileges sanely, various checks such as -be aren't a
1723 security problem, as long as you trust local users with access to their
1724 own account. When invoked by services which pass untrusted data to
1725 Exim, this might be an issue. Set this option in main configuration
1726 AND make fixes to the calling application, such as using `--` to stop
1729 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1730 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1731 responses to those, into a single TLS record each way (this usually means
1732 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1735 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1736 affects you only if you're dancing at the edge of the param size limits.
1737 If you are, and this message makes sense to you, then: raise the
1738 configured limit or use OpenSSL 1.1. Nothing we can do for older
1741 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1742 cmdline element to get the documented default one. Previously it was
1745 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1746 are unsuable for non-message-specific reasons - eg. connection timeout,
1747 banner-time rejection.
1749 JH/16 Fix logging of delivery remote port, when specified by router, under
1752 PP/06 Repair manualroute's ability to take options in any order, even if one
1753 is the name of a transport.
1756 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1758 JH/17 Change the list-building routines interface to use the expanding-string
1759 triplet model, for better allocation and copying behaviour.
1761 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1762 Previously it was constructed the first time a possibly-matching string
1763 was met in the configuration file input during startup; now it is done
1766 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1767 compatible one, to avoid the (poorly documented) possibility of a config
1768 file in the working directory redirecting the DB files, possibly correpting
1769 some existing file. CVE-2017-10140 assigned for BDB.
1771 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1772 cache-hot. Previously, although the result was properly cached, the
1773 initial verify call returned a defer.
1775 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1776 the main verify for receipient in uncached-mode.
1778 JH/22 Retire historical build files to an "unsupported" subdir. These are
1779 defined as "ones for which we have no current evidence of testing".
1781 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1782 if present. Previously it was ignored.
1784 JH/24 Start using specified-initialisers in C structure init coding. This is
1785 a C99 feature (it's 2017, so now considered safe).
1787 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1788 if was a fixed-sized field and bitmask ops via macros; it is now more
1791 PP/07 GitHub PR 56: Apply MariaDB build fix.
1792 Patch provided by Jaroslav Škarvada.
1794 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1795 during Coverity cleanups [4.87 JH/47]
1796 Diagnosis and fix provided by Michael Fischer v. Mollard.
1798 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1799 the right size to place the terminating semicolon on its own folded
1800 line, the header hash was calculated to an incorrect value thanks to
1801 the (relaxed) space the fold became.
1803 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1804 and confused the parent.
1806 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1807 which could crash as a result. This could lead to undeliverable messages.
1809 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1812 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1813 matters on fast-turnover and PID-randomising systems, which were getting
1814 out-of-order delivery.
1816 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1817 a possibly-overlapping copy. The symptom was that "Remote host closed
1818 connection in response to HELO" was logged instead of the actual 4xx
1821 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1822 Previously only that bufferd was discarded, resulting in SYMTP command
1825 JH/32 DKIM: when a message has multiple signatures matching an identity given
1826 in dkim_verify_signers, run the dkim acl once for each. Previously only
1827 one run was done. Bug 2189.
1829 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1830 "panic the current process" to "deliberately defer". The panic log is
1831 still written with the problem list name; the mail and reject logs now
1832 get a temp-reject line for the message that was being handled, saying
1833 something like "domains check lookup or other defer". The SMTP 451
1834 message is still "Temporary local problem".
1836 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1837 A crafted sequence of BDAT commands could result in in-use memory beeing
1838 freed. CVE-2017-16943.
1840 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1841 from SMTP input. Previously it was always done; now only done for DATA
1842 and not BDAT commands. CVE-2017-16944.
1844 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1845 to the message (such as an overlong header line). Previously this was
1846 not done and we did not exit BDAT mode. Followon from the previous item
1847 though a different problem.
1853 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1854 than -2003 did; needs libidn2 in addition to libidn.
1856 JH/02 The path option on a pipe transport is now expanded before use.
1858 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1859 Patch provided by "Björn", documentation fix added too.
1861 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1862 missing a wire-to-host endian conversion.
1864 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1865 close after a BDAT command line could be taken as a following command,
1866 giving a synch failure. Fix by only checking for synch immediately
1867 before acknowledging the chunk.
1869 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1870 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1871 macro. Patches provided by Josh Soref.
1873 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1874 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1875 by IANA as a service extension. However, John Klensin suggests that we
1878 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1879 the dkim code may be unix-mode line endings rather than smtp wire-format
1880 CRLF, so prepend a CR to any bare LF.
1882 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1883 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1885 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1886 the first were themselves being wrongly included in the feed into dkim
1887 processing; with most chunk sizes in use this resulted in an incorrect
1888 body hash calculated value.
1890 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1891 DKIM signature block, for verification. Although advised against by
1892 standards it is specifically not ruled illegal.
1894 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1896 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1897 missing a body hash (the bh= tag).
1899 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1900 It seems that HAProxy sends the Proxy Protocol information in clear and
1901 only then does a TLS startup, so do the same.
1903 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1904 TCP connections (such as for Spamd) unless the daemon successfully set
1905 Fast Open mode on its listening sockets. This fixes breakage seen on
1906 too-old kernels or those not configured for Fast Open, at the cost of
1907 requiring both directions being enabled for TFO, and TFO never being used
1908 by non-daemon-related Exim processes.
1910 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1911 endings, at least on the first header line. Try to canonify any that get
1912 past that check, despite the cost.
1914 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1915 now limited to an arbitrary five deep, while parsing addresses with the
1916 strip_excess_angle_brackets option enabled.
1918 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1919 instead leave the unprompted TLS handshake in socket buffer for the
1920 TLS library to consume.
1922 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1924 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1926 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1927 region in one operation, for speed, and this leaves assigned pointers
1928 dangling. Add checks run only under the testsuite which checks all
1929 variables at a store-reset and panics on a dangling pointer; add code
1930 explicitly nulling out all the variables discovered. Fixes one known
1931 bug: a transport crash, where a dangling pointer for $sending_ip_address
1932 originally assigned in a verify callout, is re-used.
1934 PP/06 Drop '.' from @INC in various Perl scripts.
1936 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1938 PP/08 Reduce a number of compilation warnings under clang; building with
1939 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1940 should be warning-free.
1942 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1944 HS/01 Fix portability problems introduced by PP/08 for platforms where
1945 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1947 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1948 chunk. This allows us to accept broken chunked messages. We need a more
1949 general solution here.
1951 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1952 already-broken messages in the queue.
1954 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1956 JH/19 Fix reference counting bug in routing-generated-address tracking.
1962 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1963 supports it and a size is available (ie. the sending peer gave us one).
1965 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1966 years of being deprecated). The replacements are the ACLs
1967 acl_smtp_mime and acl_not_smtp_mime.
1969 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1970 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1971 or even an in-clear connection were permitted. Now, if the host lookup
1972 was dnssec and dane was requested then the host is only used if the
1973 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1974 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1975 if one fails this test.
1976 This means that a poorly-configured remote DNS will make it incommunicado;
1977 but it protects against a DNS-interception attack on it.
1979 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1980 non-noisy when a race steals the message being considered.
1982 JH/05 If main configuration option tls_certificate is unset, generate a
1983 self-signed certificate for inbound TLS connections.
1985 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1986 in rewrites and routers.
1988 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1989 and logged a warning sing 4.83; now they are a configuration file error.
1991 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1992 (lacking @domain). Apply the same qualification processing as RCPT.
1994 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1996 JH/10 Support ${sha256:} applied to a string (as well as the previous
1999 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2000 a cutthrough deliver is pending, as we always want to make a connection.
2001 This also avoids re-routing the message when later placing the cutthrough
2002 connection after a verify cache hit.
2003 Do not update it with the verify result either.
2005 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2006 when routing results in more than one destination address.
2008 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2009 signing (which inhibits the cutthrough capability). Previously only
2010 the presence of an option was tested; now an expansion evaluating as
2011 empty is permissible (obviously it should depend only on data available
2012 when the cutthrough connection is made).
2014 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2015 the relevant preceding SMTP command did not note the pipelining mode.
2017 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2018 Previously they were not counted.
2020 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2021 as one having no matching records. Previously we deferred the message
2022 that needed the lookup.
2024 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2025 distinguished as "(=".
2027 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2028 for missing MX records. Previously it only worked for missing A records.
2030 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2032 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2033 after the data-go-ahead and data-ack. Patch from Jason Betts.
2035 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2036 even for a "none" policy. Patch from Tony Meyer.
2038 JH/22 Fix continued use of a connection for further deliveries. If a port was
2039 specified by a router, it must also match for the delivery to be
2042 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2043 When one of the recipients of a message was unsuitable for the connection
2044 (has no matching addresses), we lost track of needing to mark it
2045 deferred. As a result mail would be lost.
2047 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2049 JH/25 Decoding ACL controls is now done using a binary search; the source code
2050 takes up less space and should be simpler to maintain. Merge the ACL
2051 condition decode tables also, with similar effect.
2053 JH/26 Fix problem with one_time used on a redirect router which returned the
2054 parent address unchanged. A retry would see the parent address marked as
2055 delivered, so not attempt the (identical) child. As a result mail would
2058 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2059 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2060 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2063 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2064 Main config options check_{log,spool}_{inodes,space} are now
2065 100 inodes, 10MB unless set otherwise in the configuration.
2067 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2068 Previously it only applied to the main-section connection policy
2071 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2073 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2074 by me. Added RFC7919 DH primes as an alternative.
2076 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2077 are not in the system include path.
2079 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2080 GnuTLS, when a session startup failed (eg because the client disconnected)
2081 Exim did stdio operations after fclose. This was exposed by a recent
2082 change which nulled out the file handle after the fclose.
2084 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2085 signed directly by the cert-signing cert, rather than an intermediate
2086 OCSP-signing cert. This is the model used by LetsEncrypt.
2088 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2090 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2091 an incoming connection.
2093 HS/02 Bug 1802: Do not half-close the connection after sending a request
2096 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2097 fallback to "prime256v1".
2099 JH/34 SECURITY: Use proper copy of DATA command in error message.
2100 Could leak key material. Remotely exploitable. CVE-2016-9963.
2106 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2107 and 3.4.4 - once the server is enabled to respond to an OCSP request
2108 it does even when not requested, resulting in a stapling non-aware
2109 client dropping the TLS connection.
2111 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2112 support variable-length bit vectors. No functional change.
2114 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2115 The I= interface field on outgoing lines is now after the H= remote
2116 host field, same as incoming lines. There is a separate
2117 outgoing_interface log selector which allows you to disable the
2120 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2121 If not running log_selector +smtp_connection the mainlog would be held
2122 open indefinitely after a "too many connections" event, including to a
2123 deleted file after a log rotate. Leave the per net connection logging
2124 leaving it open for efficiency as that will be quickly detected by the
2125 check on the next write.
2127 HS/01 Bug 1671: Fix post transport crash.
2128 Processing the wait-<transport> messages could crash the delivery
2129 process if the message IDs didn't exist for some reason. When
2130 using 'split_spool_directory=yes' the construction of the spool
2131 file name failed already, exposing the same netto behaviour.
2133 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2134 mime_regex ACL conditions.
2136 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2137 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2138 to HELO, local diagnostic string.
2140 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2141 log line to debug. Even when configured with a tls authenticator many
2142 client connections are expected to not authenticate in this way, so
2143 an authenticate fail is not an error.
2145 HS/02 Add the Exim version string to the process info. This way exiwhat
2146 gives some more detail about the running daemon.
2148 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2149 matter for fast-change records such as DNSBLs.
2151 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2152 retry record, even if constant. There may be multiple transports with
2153 different interface settings and the retry behaviour needs to be kept
2156 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2158 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2160 JH/10 Bug 840: fix log_defer_output option of pipe transport
2162 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2163 hosts_randomize. This matters a lot when combined with mua_wrapper.
2165 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2166 ${quote_pgsql:<string>} operator.
2168 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2170 JH/14 Change header file name for freeradius-client. Relevant if compiling
2171 with Radius support; from the Gentoo tree and checked under Fedora.
2173 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2175 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2176 option transport_filter, meaning no filtering.
2178 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2180 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2181 defaults to "*" (all hosts). The variable is now available when not built
2182 with TLS, default unset, mainly to enable keeping the testsuite sane.
2183 If a server certificate is not supplied (via tls_certificate) an error is
2184 logged, and clients will find TLS connections fail on startup. Presumably
2185 they will retry in-clear.
2186 Packagers of Exim are strongly encouraged to create a server certificate
2187 at installation time.
2189 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2190 with the $config_file variable.
2192 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2193 in transport context, after the attempt, and per-recipient. The latter type
2194 is per host attempted. The event data is the error message, and the errno
2195 information encodes the lookup type (A vs. MX) used for the (first) host,
2196 and the trailing two digits of the smtp 4xx response.
2198 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2199 to write to mainlog (or rejectlog, paniclog) in the window between file
2200 creation and permissions/ownership being changed. Particularly affects
2201 installations where exicyclog is run as root, rather than exim user;
2202 result is that the running daemon panics and dies.
2204 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2206 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2207 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2208 "pri" and "weight". Note that the previous implicit priority given by the
2209 list order is no longer honoured.
2211 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2212 for DKIM processing.
2214 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2215 by defining SUPPORT_SOCKS.
2217 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2218 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2219 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2220 variables are renamed to proxy_{local,external}_{address,port}.
2222 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2223 for a build by defining SUPPORT_I18N
2225 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2226 of the query string, and make ${quote_redis:} do that quoting.
2228 JH/29 Move Events support from Experimental to mainline, enabled by default
2229 and removable for a build by defining DISABLE_EVENT.
2231 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2233 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2234 cached by the daemon.
2236 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2237 by defining LOOKUP_REDIS. The libhiredis library is required.
2239 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2240 keys are given for lookup.
2242 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2243 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2244 only supported when built with TLS support. The PolarSSL SHA routines
2245 are still used when the TLS library is too old for convenient support.
2247 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2248 openssl_options), for security. OpenSSL forces this from version 1.1.0
2249 server-side so match that on older versions.
2251 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2252 allocation for $value could be released as the expansion processing
2253 concluded, but leaving the global pointer active for it.
2255 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2256 and to use the domains and local_parts ACL conditions.
2258 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2259 incorrectly not doubled on cutthrough transmission, hence seen as a
2260 body-termination at the receiving system - resulting in truncated mails.
2261 Commonly the sender saw a TCP-level error, and retransmitted the message
2262 via the normal store-and-forward channel. This could result in duplicates
2263 received - but deduplicating mailstores were liable to retain only the
2264 initial truncated version.
2266 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2268 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2270 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2271 we're in there, support oversigning also; bug 1309.
2273 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2275 HS/04 Add support for keep_environment and add_environment options.
2277 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2278 either intentional arithmetic overflow during PRNG, or testing config-
2281 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2282 delivery resulted in actual delivery. Cancel cutthrough before DATA
2285 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2286 rejects a recipient: pass the reject to the originator.
2288 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2289 Many were false-positives and ignorable, but it's worth fixing the
2292 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2293 for the new environment-manipulation done at startup. Move the routines
2294 from being local to tls.c to being global via the os.c file.
2296 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2297 an extract embedded as result-arg for a map, the first arg for extract
2298 is unavailable so we cannot tell if this is a numbered or keyed
2299 extraction. Accept either.
2305 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2308 JH/02 The smtp transport option "multi_domain" is now expanded.
2310 JH/03 The smtp transport now requests PRDR by default, if the server offers
2313 JH/04 Certificate name checking on server certificates, when exim is a client,
2314 is now done by default. The transport option tls_verify_cert_hostnames
2315 can be used to disable this per-host. The build option
2316 EXPERIMENTAL_CERTNAMES is withdrawn.
2318 JH/05 The value of the tls_verify_certificates smtp transport and main options
2319 default to the word "system" to access the system default CA bundle.
2320 For GnuTLS, only version 3.0.20 or later.
2322 JH/06 Verification of the server certificate for a TLS connection is now tried
2323 (but not required) by default. The verification status is now logged by
2324 default, for both outbound TLS and client-certificate supplying inbound
2327 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2330 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2331 Status Notification (bounce) messages are now MIME format per RFC 3464.
2332 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2333 under the control of the dsn_advertise_hosts option, and routers may
2334 have a dsn_lasthop option.
2336 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2337 default, modifiable by a malware= option. The list separator for
2338 the options can now be changed in the usual way. Bug 68.
2340 JH/10 The smtp_receive_timeout main option is now expanded before use.
2342 JH/11 The incoming_interface log option now also enables logging of the
2343 local interface on delivery outgoing connections.
2345 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2346 if the interface and destination host and port all match.
2348 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2351 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2352 Patch from Andrew Lewis.
2354 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2355 now supports optional time-restrictions, weighting, and priority
2356 modifiers per server. Patch originally by <rommer@active.by>.
2358 JH/16 The spamd_address main option now supports a mixed list of local
2359 and remote servers. Remote servers can be IPv6 addresses, and
2360 specify a port-range.
2362 JH/17 Bug 68: The spamd_address main option now supports an optional
2363 timeout value per server.
2365 JH/18 Bug 1581: Router and transport options headers_add/remove can
2366 now have the list separator specified.
2368 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2371 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2374 JH/21 Support for the A6 type of dns record is withdrawn.
2376 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2377 rather than the verbs used.
2379 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2380 from 255 to 1024 chars.
2382 JH/24 Verification callouts now attempt to use TLS by default.
2384 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2385 are generic router options now. The defaults didn't change.
2387 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2388 Original patch from Alexander Shikoff, worked over by JH.
2390 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2391 files if ZCAT_COMMAND is not executable.
2393 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2395 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2397 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2398 Normally benign, it bites when the pair was led to by a CNAME;
2399 modern usage is to not canonicalize the domain to a CNAME target
2400 (and we were inconsistent anyway for A-only vs AAAA+A).
2402 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2404 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2405 when evaluating $sender_host_dnssec.
2407 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2408 $sender_helo_dnssec variable.
2410 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2412 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2414 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2416 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2417 documented as working, but never had. Support all but $spam_report.
2419 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2420 added for tls authenticator.
2422 HS/03 Add perl_taintmode main config option
2428 TL/01 When running the test suite, the README says that variables such as
2429 no_msglog_check are global and can be placed anywhere in a specific
2430 test's script, however it was observed that placement needed to be near
2431 the beginning for it to behave that way. Changed the runtest perl
2432 script to read through the entire script once to detect and set these
2433 variables, reset to the beginning of the script, and then run through
2434 the script parsing/test process like normal.
2436 TL/02 The BSD's have an arc4random API. One of the functions to induce
2437 adding randomness was arc4random_stir(), but it has been removed in
2438 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2439 function when detected.
2441 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2442 cause callback expansion.
2444 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2445 syntax errors in an expansion can be treated as a string instead of
2446 logging or causing an error, due to the internal use of bool_lax
2447 instead of bool when processing it.
2449 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2450 server certificates when making smtp deliveries.
2452 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2454 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2456 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2458 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2459 Merged patch from Sebastian Wiedenroth.
2461 JH/05 Fix results-pipe from transport process. Several recipients, combined
2462 with certificate use, exposed issues where response data items split
2463 over buffer boundaries were not parsed properly. This eventually
2464 resulted in duplicates being sent. This issue only became common enough
2465 to notice due to the introduction of connection certificate information,
2466 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2468 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2469 size buffer was used, resulting in syntax errors when an expansion
2472 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2473 version 3.3.6 or later.
2475 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2476 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2477 both become "event_action", the variables become $event_name, $event_data
2478 and $event_defer_errno. There is a new variable $verify_mode, usable in
2479 routers, transports and related events. The tls:cert event is now also
2480 raised for inbound connections, if the main configuration event_action
2483 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2484 early OCSP support, but no stapling (appears to be less than 1.0.0).
2486 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2487 server certificate names available under the smtp transport option
2488 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2491 JH/10 Time-related extraction expansions from certificates now use the main
2492 option "timezone" setting for output formatting, and are consistent
2493 between OpenSSL and GnuTLS compilations. Bug 1541.
2495 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2496 encoded parameter in the incoming message. Bug 1558.
2498 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2499 include certificate info, eximon was claiming there were spoolfile
2502 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2504 JH/14 Log delivery-related information more consistently, using the sequence
2505 "H=<name> [<ip>]" wherever possible.
2507 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2508 are problematic for Debian distribution, omit them from the release
2511 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2513 JH/16 Fix string representation of time values on 64bit time_t architectures.
2516 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2517 output list separator was used.
2522 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2523 checkers that were complaining about end of non-void function with no
2526 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2527 This was a regression introduced in 4.83 by another bugfix.
2529 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2531 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2532 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2538 TF/01 Correctly close the server side of TLS when forking for delivery.
2540 When a message was received over SMTP with TLS, Exim failed to clear up
2541 the incoming connection properly after forking off the child process to
2542 deliver the message. In some situations the subsequent outgoing
2543 delivery connection happened to have the same fd number as the incoming
2544 connection previously had. Exim would try to use TLS and fail, logging
2545 a "Bad file descriptor" error.
2547 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2548 utilities have not been installed.
2550 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2551 temporary space as the ACL may create new global variables.
2553 TL/01 LDAP support uses per connection or global context settings, depending
2554 upon the detected version of the libraries at build time.
2556 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2557 to extract and use the src ip:port in logging and expansions as if it
2558 were a direct connection from the outside internet. PPv2 support was
2559 updated based on HAProxy spec change in May 2014.
2561 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2563 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2564 Properly escape header and check for NULL return.
2566 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2569 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2571 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2572 characters in header names, implemented as a verify condition.
2573 Contributed by Michael Fischer v. Mollard.
2575 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2576 results permerror and temperror. Previous values are deprecated but
2577 still accepted. In a future release, err_perm and err_temp will be
2578 completely removed, which will be a backward incompatibility if the
2579 ACL tests for either of these two old results. Patch contributed by
2580 user bes-internal on the mailing list.
2582 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2584 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2585 selectors, in both main and reject logs.
2587 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2590 JH/07 Add malware type "sock" for talking to simple daemon.
2592 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2594 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2595 routers/transports under cutthrough routing.
2597 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2598 numbers. Touch up "bool" conditional to keep the same definition.
2600 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2602 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2604 JH/12 Expand items in router/transport headers_add or headers_remove lists
2605 individually rather than the list as a whole. Bug 1452.
2607 Required for reasonable handling of multiple headers_ options when
2608 they may be empty; requires that headers_remove items with embedded
2609 colons must have them doubled (or the list-separator changed).
2611 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2612 view the policy declared in the DMARC record. Currently, $dmarc_status
2613 is a combined value of both the record presence and the result of the
2616 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2618 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2619 dnslookup router and the smtp transport (applying to the forward
2622 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2623 of ldap servers used for a specific lookup. Patch provided by Heiko
2626 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2627 New variable $lookup_dnssec_authenticated for observability.
2629 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2630 Patch submitted by Lars Timman.
2632 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2634 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2635 Requires trusted mode and valid format message id, aborts otherwise.
2636 Patch contributed by Heiko Schlichting.
2638 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2639 certextract with support for various fields. Bug 1358.
2641 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2642 is requested by default, modifiable by smtp transport option
2645 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2646 operate on certificate variables to give certificate fingerprints
2647 Also new ${sha256:cert_variable}.
2649 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2651 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2652 Christian Aistleitner.
2654 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2656 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2657 file. Patch from Wolfgang Breyha.
2659 JH/25 Expand the coverage of the delivery $host and $host_address to
2660 client authenticators run in verify callout. Bug 1476.
2662 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2663 align with daemon_smtp_ports. Bug 72.
2665 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2666 support and error reporting did not work properly.
2668 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2669 and is readable. Patch from Andrew Colin Kissa.
2671 TL/14 Enhance documentation of ${run expansion and how it parses the
2672 commandline after expansion, particularly in the case when an
2673 unquoted variable expansion results in an empty value.
2675 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2677 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2678 by renaming away from it. Addresses GH issue 15, reported by
2681 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2683 TL/15 SECURITY: prevent double expansion in math comparison functions
2684 (can expand unsanitized data). Not remotely exploitable.
2691 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2693 PP/02 Make -n do something, by making it not do something.
2694 When combined with -bP, the name of an option is not output.
2696 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2699 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2700 $sender_host_name and config options to manage this, and basic check
2703 PP/05 DSCP support for outbound connections and control modifier for inbound.
2705 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2706 (Only plugin which currently uses this is kerberos4, which nobody should
2707 be using, but we should make it available and other future plugins might
2708 conceivably use it, even though it would break NAT; stuff *should* be
2709 using channel bindings instead).
2711 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2712 name; added for Sendmail compatibility; requires admin caller.
2713 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2714 just ignore it); requires trusted caller.
2715 Also parse but ignore: -Ac -Am -X<logfile>
2718 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2720 TL/02 Add +smtp_confirmation as a default logging option.
2722 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2723 Patch by Magnus Holmgren from 2007-02-20.
2725 TL/04 Bugzilla 1281 - Spec typo.
2726 Bugzilla 1283 - Spec typo.
2727 Bugzilla 1290 - Spec grammar fixes.
2729 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2731 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2733 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2734 mailing list by by Dmitry Isaikin.
2736 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2738 JH/02 Support "G" suffix to numbers in ${if comparisons.
2740 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2742 NM/01 Bugzilla 1197 - Spec typo
2743 Bugzilla 1196 - Spec examples corrections
2745 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2747 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2748 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2751 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2752 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2754 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2755 "acl {{name}{arg}...}", and optional args on acl condition
2758 JH/05 Permit multiple router/transport headers_add/remove lines.
2760 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2762 JH/07 Avoid using a waiting database for a single-message-only transport.
2763 Performance patch from Paul Fisher. Bugzilla 1262.
2765 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2768 JH/09 Add $headers_added variable, with content from use of ACL modifier
2769 add_header (but not yet added to the message). Bugzilla 199.
2771 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2772 Pulled from Bugzilla 817 by Wolfgang Breyha.
2774 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2776 (nb: this is the same fix as in Exim 4.80.1)
2778 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2781 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2784 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2786 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2787 advertise SMTP AUTH mechanism to us, instead of a generic
2788 protocol violation error. Also, make Exim more robust to bad
2789 data from the Dovecot auth socket.
2791 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2793 When a queue runner is handling a message, Exim first routes the
2794 recipient addresses, during which it prunes them based on the retry
2795 hints database. After that it attempts to deliver the message to
2796 any remaining recipients. It then updates the hints database using
2799 So if a recipient address works intermittently, it can get repeatedly
2800 deferred at routing time. The retry hints record remains fresh so the
2801 address never reaches the final cutoff time.
2803 This is a fairly common occurrence when a user is bumping up against
2804 their storage quota. Exim had some logic in its local delivery code
2805 to deal with this. However it did not apply to per-recipient defers
2806 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2808 This change adds a proper retry rule check during routing so that the
2809 final cutoff time is checked against the message's age. We only do
2810 this check if there is an address retry record and there is not a
2811 domain retry record; this implies that previous attempts to handle
2812 the address had the retry_use_local_parts option turned on. We use
2813 this as an approximation for the destination being like a local
2814 delivery, as in LMTP.
2816 I suspect this new check makes the old local delivery cutoff check
2817 redundant, but I have not verified this so I left the code in place.
2819 TF/02 Correct gecos expansion when From: is a prefix of the username.
2821 Test 0254 submits a message to Exim with the header
2825 When I ran the test suite under the user fanf2, Exim expanded
2826 the header to contain my full name, whereas it should have added
2827 a Resent-Sender: header. It erroneously treats any prefix of the
2828 username as equal to the username.
2830 This change corrects that bug.
2832 GF/01 DCC debug and logging tidyup
2833 Error conditions log to paniclog rather than rejectlog.
2834 Debug lines prefixed by "DCC: " to remove any ambiguity.
2836 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2838 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2839 Bug spotted by Jeremy Harris; was flawed since initial commit.
2840 Would have resulted in OCSP responses post-SNI triggering an Exim
2841 NULL dereference and crash.
2843 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2845 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2846 Bug detection, analysis and fix by Samuel Thibault.
2847 Bugzilla 1331, Debian bug #698092.
2849 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2851 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2852 Server implementation by Todd Lyons, client by JH.
2853 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2854 config variable "prdr_enable" controls whether the server
2855 advertises the facility. If the client requests PRDR a new
2856 acl_data_smtp_prdr ACL is called once for each recipient, after
2857 the body content is received and before the acl_smtp_data ACL.
2858 The client is controlled by both of: a hosts_try_prdr option
2859 on the smtp transport, and the server advertisement.
2860 Default client logging of deliveries and rejections involving
2861 PRDR are flagged with the string "PRDR".
2863 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2864 fclose(). Diagnosis by Todd Lyons.
2866 PP/17 Update configure.default to handle IPv6 localhost better.
2867 Patch by Alain Williams (plus minor tweaks).
2870 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2871 This is now consistent with GnuTLS, and is now documented: the
2872 previous undocumented portable approach to treating the option as
2873 unset was to force an expansion failure. That still works, and
2874 an empty string is now equivalent.
2876 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2877 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2878 not performing validation itself.
2880 PP/20 Added force_command boolean option to pipe transport.
2881 Patch from Nick Koston, of cPanel Inc.
2883 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2886 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2888 PP/21 Fix eximon continuous updating with timestamped log-files.
2889 Broken in a format-string cleanup in 4.80, missed when I repaired the
2890 other false fix of the same issue.
2891 Report and fix from Heiko Schlichting.
2894 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2895 Report from Prashanth Katuri.
2897 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2898 It's SecureTransport, so affects any MacOS clients which use the
2899 system-integrated TLS libraries, including email clients.
2901 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2902 using a MIME ACL for non-SMTP local injection.
2903 Report and assistance in diagnosis by Warren Baker.
2905 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2907 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2909 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2910 last id that failed so it may be referenced in subsequent ACL's.
2912 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2915 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2916 ldap library initialization, allowing self-signed CA's to be
2917 used. Also properly sets require_cert option later in code by
2918 using NULL (global ldap config) instead of ldap handle (per
2919 session). Bug diagnosis and testing by alxgomz.
2921 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2922 the src/util/ subdirectory.
2924 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2925 renamed to Transport Post Delivery Action by Jeremy Harris, as
2928 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2929 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2930 redis_servers = needs to be configured which will be used by the redis
2931 lookup. Patch from Warren Baker, of The Packet Hub.
2933 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2935 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2936 hostname or reverse DNS when processing a host list. Used suggestions
2937 from multiple comments on this bug.
2939 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2941 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2942 Missed a few lines, added it to make the runtest require no keyboard
2945 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2946 contains upper case chars. Make router use caseful_local_part.
2948 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2949 support when GnuTLS has been built with p11-kit.
2955 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2957 This, or similar/improved, will also be change PP/11 of 4.82.
2963 PP/01 Handle short writes when writing local log-files.
2964 In practice, only affects FreeBSD (8 onwards).
2965 Bugzilla 1053, with thanks to Dmitry Isaikin.
2967 NM/01 Bugzilla 949 - Documentation tweak
2969 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2972 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2974 PP/02 Implemented gsasl authenticator.
2976 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2978 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2979 `pkg-config foo` for cflags/libs.
2981 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2982 with rest of GSASL and with heimdal_gssapi.
2984 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2985 `pkg-config foo` for cflags/libs for the TLS implementation.
2987 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2988 properties get this fed in as external SSF. A number of robustness
2989 and debugging improvements to the cyrus_sasl authenticator.
2991 PP/08 cyrus_sasl server now expands the server_realm option.
2993 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2994 Patch by Jeremy Harris.
2996 PP/10 Added dbmjz lookup type.
2998 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3000 PP/12 MAIL args handles TAB as well as SP, for better interop with
3001 non-compliant senders.
3002 Analysis and variant patch by Todd Lyons.
3004 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3005 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3006 Patch from Dirk Mueller <dmueller@suse.com>
3008 PP/13 tls_peerdn now print-escaped for spool files.
3009 Observed some $tls_peerdn in wild which contained \n, which resulted
3010 in spool file corruption.
3012 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3013 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3014 or write after TLS renegotiation, which otherwise led to messages
3017 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3018 as a tracking header (ie: a signed header comes before the signature).
3019 Patch from Wolfgang Breyha.
3021 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3022 comma-sep list; embedded commas doubled.
3024 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3026 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3028 Report and patch from Dmitry Banschikov.
3030 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3031 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3032 failures. We appear to now support TLS1.1+ with Exim.
3034 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3035 lets Exim select keys and certificates based upon TLS SNI from client.
3036 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3037 before an outbound SMTP session. New log_selector, +tls_sni.
3039 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3040 NULL dereference. Report and patch from Alun Jones.
3042 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3043 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3044 Not seeing resolver debug output on NetBSD, but suspect this is a
3045 resolver implementation change.
3047 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3048 Left warnings. Added "eximon gdb" invocation mode.
3050 PP/21 Defaulting "accept_8bitmime" to true, not false.
3052 PP/22 Added -bw for inetd wait mode support.
3054 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3055 locate the relevant includes and libraries. Made this the default.
3057 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3058 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3060 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3061 This may cause build issues on older platforms.
3063 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3064 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3065 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3066 Added SNI support via GnuTLS too.
3067 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3069 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3071 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3072 Applied second patch from Janne, implementing suggestion to default
3073 multiple-strings-in-record handling to match SPF spec.
3075 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3077 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3078 read-only, out of scope).
3079 Patch from Wolfgang Breyha, report from Stuart Northfield.
3081 PP/29 Fix three issues highlighted by clang analyser static analysis.
3082 Only crash-plausible issue would require the Cambridge-specific
3083 iplookup router and a misconfiguration.
3084 Report from Marcin Mirosław.
3086 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3088 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3089 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3090 As part of this, removing so much warning spew let me fix some minor
3091 real issues in debug logging.
3093 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3094 assignment on my part. Fixed.
3096 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3097 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3098 Janne Snabb (who went above and beyond: thank you).
3100 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3101 string otherwise requires a connection and a bunch more work and it's
3102 relatively easy to get wrong. Should also expose TLS library linkage
3105 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3106 64-bit ${eval} (JH/03).
3108 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3109 GNU libc to support some of the 64-bit stuff, should not lead to
3110 conflicts. Defined before os.h is pulled in, so if a given platform
3111 needs to override this, it can.
3113 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3114 protection layer was required, which is not implemented.
3115 Bugzilla 1254, patch from Wolfgang Breyha.
3117 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3118 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3119 tls_dhparam take prime identifiers. Also unbreak combination of
3120 OpenSSL+DH_params+TLSSNI.
3122 PP/39 Disable SSLv2 by default in OpenSSL support.
3128 PP/01 Solaris build fix for Oracle's LDAP libraries.
3129 Bugzilla 1109, patch from Stephen Usher.
3131 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3133 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3136 TF/02 Fix a couple more cases where we did not log the error message
3137 when unlink() failed. See also change 4.74-TF/03.
3139 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3140 lock up or crash if it happened to be inside a call to libc when it
3141 got a SIGUSR1 from exiwhat.
3143 The SIGUSR1 handler appends the current process status to the process
3144 log which is later printed by exiwhat. It used to use the general
3145 purpose logging code to do this, but several functions it calls are
3146 not safe for signals.
3148 The new output code in the SIGUSR1 handler is specific to the process
3149 log, and simple enough that it's easy to inspect for signal safety.
3150 Removing some special cases also simplifies the general logging code.
3151 Removing the spurious timestamps from the process log simplifies
3154 TF/04 Improved ratelimit ACL condition.
3156 The /noupdate option has been deprecated in favour of /readonly which
3157 has clearer semantics. The /leaky, /strict, and /readonly update modes
3158 are mutually exclusive. The update mode is no longer included in the
3159 database key; it just determines when the database is updated. (This
3160 means that when you upgrade Exim will forget old rate measurements.)
3162 Exim now checks that the per_* options are used with an update mode that
3163 makes sense for the current ACL. For example, when Exim is processing a
3164 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3165 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3166 must specify per_mail/readonly. If you omit the update mode it defaults to
3167 /leaky where that makes sense (as before) or /readonly where required.
3169 The /noupdate option is now undocumented but still supported for
3170 backwards compatibility. It is equivalent to /readonly except that in
3171 ACLs where /readonly is required you may specify /leaky/noupdate or
3172 /strict/noupdate which are treated the same as /readonly.
3174 A useful new feature is the /count= option. This is a generalization
3175 of the per_byte option, so that you can measure the throughput of other
3176 aggregate values. For example, the per_byte option is now equivalent
3177 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3179 The per_rcpt option has been generalized using the /count= mechanism
3180 (though it's more complicated than the per_byte equivalence). When it is
3181 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3182 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3183 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3184 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3185 Note that using per_rcpt with a non-readonly update mode in more than
3186 one ACL will cause the recipients to be double-counted. (The per_mail
3187 and per_byte options don't have this problem.)
3189 The handling of very low rates has changed slightly. If the computed rate
3190 is less than the event's count (usually one) then this event is the first
3191 after a long gap. In this case the rate is set to the same as this event's
3192 count, so that the first message of a spam run is counted properly.
3194 The major new feature is a mechanism for counting the rate of unique
3195 events. The new per_addr option counts the number of different
3196 recipients that someone has sent messages to in the last time period. It
3197 behaves like per_rcpt if all the recipient addresses are different, but
3198 duplicate recipient addresses do not increase the measured rate. Like
3199 the /count= option this is a general mechanism, so the per_addr option
3200 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3201 example, measure the rate that a client uses different sender addresses
3202 with the options per_mail/unique=$sender_address. There are further
3203 details in the main documentation.
3205 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3207 TF/06 Removed a few PCRE remnants.
3209 TF/07 Automatically extract Exim's version number from tags in the git
3210 repository when doing development or release builds.
3212 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3213 Bugzilla 879. Patch from Paul Fisher.
3215 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3216 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3219 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3221 PP/05 Variable $av_failed, true if the AV scanner deferred.
3222 Bugzilla 1078. Patch from John Horne.
3224 PP/06 Stop make process more reliably on build failure.
3225 Bugzilla 1087. Patch from Heiko Schlittermann.
3227 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3228 Bugzilla 1089. Patch from Heiko Schlittermann.
3230 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3231 Bugzilla 1131. Patch from Holger Weiß.
3233 PP/09 Handle IPv6 addresses with SPF.
3234 Bugzilla 860. Patch from Wolfgang Breyha.
3236 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3238 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3241 PP/11 match_* no longer expand right-hand-side by default.
3242 New compile-time build option, EXPAND_LISTMATCH_RHS.
3243 New expansion conditions, "inlist", "inlisti".
3245 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3247 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3249 PP/14 fix log_write() format string regression from TF/03.
3250 Bugzilla 1152. Patch from Dmitry Isaikin.
3256 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3258 PP/02 Harmonised TLS library version reporting; only show if debugging.
3259 Layout now matches that introduced for other libraries in 4.74 PP/03.
3261 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3263 PP/04 New "dns_use_edns0" global option.
3265 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3268 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3269 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3271 TK/01 Updated PolarSSL code to 0.14.2.
3272 Bugzilla 1097. Patch from Andreas Metzler.
3274 PP/07 Catch divide-by-zero in ${eval:...}.
3275 Fixes bugzilla 1102.
3277 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3280 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3281 format-string attack -- SECURITY: remote arbitrary code execution.
3283 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3284 time unintentionally subject to list matching rules, letting the header
3285 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3286 arbitrary string expansion). This allowed for information disclosure.
3288 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3289 INT_MIN/-1 -- value coerced to INT_MAX.
3295 NM/01 Workaround for PCRE version dependency in version reporting
3298 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3299 This fixes portability to compilers other than gcc, notably
3300 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3302 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3303 makefiles for portability to HP-UX and POSIX correctness.
3305 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3306 Also via indented variable definition in the Makefile.
3307 (Debugging by Oliver Heesakkers).
3309 PP/02 Restore caching of spamd results with expanded spamd_address.
3310 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3312 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3313 Improves build reliability. Fix from: Frank Elsner
3315 NM/02 Fix wide character breakage in the rfc2047 coding
3316 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3318 NM/03 Allow underscore in dnslist lookups
3319 Fixes bug 1026. Patch from Graeme Fowler
3321 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3322 Code patches from Adam Ciarcinski of NetBSD.
3324 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3327 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3328 is logged, to avoid truncation. Patch from John Horne.
3330 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3331 Patch from Jakob Hirsch.
3333 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3334 SQL string expansion failure details.
3335 Patch from Andrey Oktyabrski.
3337 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3338 Patch from Simon Arlott.
3340 PP/09 New lookups functionality failed to compile on old gcc which rejects
3341 extern declarations in function scope.
3342 Patch from Oliver Fleischmann
3344 PP/10 Use sig_atomic_t for flags set from signal handlers.
3345 Check getgroups() return and improve debugging.
3346 Fixed developed for diagnosis in bug 927 (which turned out to be
3349 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3350 Patch from Mark Zealey.
3352 PP/12 Bugzilla 1056: Improved spamd server selection.
3353 Patch from Mark Zealey.
3355 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3356 Based on patch from Heiko Schlittermann.
3358 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3359 Patch from Uwe Doering, sign-off by Michael Haardt.
3361 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3362 variable declaration deep within a block. Bug and patch from
3365 PP/15 lookups-Makefile IRIX compatibility coercion.
3367 PP/16 Make DISABLE_DKIM build knob functional.
3369 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3370 Patch by Simon Arlott
3372 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3373 variable argument macros. Our copy now differs from upstream.
3379 TF/01 Failure to get a lock on a hints database can have serious
3380 consequences so log it to the panic log.
3382 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3383 controlled using the smtp_confirmation log selector.
3385 TF/03 Include the error message when we fail to unlink a spool file.
3387 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3388 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3389 for maintaining out-of-tree patches for some time.
3391 PP/01 Bugzilla 139: Documentation and portability issues.
3392 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3393 Handle per-OS dynamic-module compilation flags.
3395 PP/02 Let /dev/null have normal permissions.
3396 The 4.73 fixes were a little too stringent and complained about the
3397 permissions on /dev/null. Exempt it from some checks.
3398 Reported by Andreas M. Kirchwitz.
3400 PP/03 Report version information for many libraries, including
3401 Exim version information for dynamically loaded libraries. Created
3402 version.h, now support a version extension string for distributors
3403 who patch heavily. Dynamic module ABI change.
3405 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3406 privilege escalation vulnerability whereby the Exim run-time user
3407 can cause root to append content of the attacker's choosing to
3410 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3413 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3414 If dropping privileges for untrusted macros, we disabled normal logging
3415 on the basis that it would fail; for the Exim run-time user, this is not
3416 the case, and it resulted in successful deliveries going unlogged.
3417 Fixed. Reported by Andreas Metzler.
3423 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3424 only prepend for the Resent-* case. Fixes regression introduced in
3425 Exim 4.70 by NM/22 for Bugzilla 607.
3427 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3428 increasing numbers of administrators be bitten by this.
3430 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3432 PP/03 Bugzilla 994: added openssl_options main configuration option.
3434 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3436 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3438 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3440 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3441 without a peer certificate, leading to a segfault because of an
3442 assumption that peers always have certificates. Be a little more
3443 paranoid. Problem reported by Martin Tscholak.
3445 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3446 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3447 NB: ClamAV planning to remove STREAM in "middle of 2010".
3448 CL also introduces -bmalware, various -d+acl logging additions and
3449 more caution in buffer sizes.
3451 PP/09 Implemented reverse_ip expansion operator.
3453 PP/10 Bugzilla 937: provide a "debug" ACL control.
3455 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3457 PP/12 Bugzilla 973: Implement --version.
3459 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3461 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3463 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3465 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3466 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3467 ignore trailing whitespace.
3469 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3471 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3474 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3475 Notification from Dr Andrew Aitchison.
3477 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3478 ExtendedDetectionInfo response format.
3479 Notification from John Horne.
3481 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3484 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3485 XSL and documented dependency on system catalogs, with examples of how
3488 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3491 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3492 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3493 configuration file which is writeable by the Exim user or group.
3495 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3496 of configuration files to cover files specified with the -C option if
3497 they are going to be used with root privileges, not just the default
3500 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3501 option (effectively making it always true).
3503 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3504 files to be used while preserving root privileges.
3506 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3507 that rogue child processes cannot use them.
3509 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3510 run-time user, instead of root.
3512 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3513 Exim run-time user without dropping privileges.
3515 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3516 result string, instead of calling string_vformat() twice with the same
3519 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3520 for other users. Others should always drop root privileges if they use
3521 -C on the command line, even for a whitelisted configure file.
3523 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3525 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3531 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3532 $data_path, and $header_path variables; fixed documentation bugs and
3535 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3536 exipick to access non-standard spools, including the "frozen" queue
3539 NM/01 Bugzilla 965: Support mysql stored procedures.
3540 Patch from Alain Williams
3542 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3544 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3545 Patch from Andreas Metzler
3547 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3548 Patch from Kirill Miazine
3550 NM/05 Bugzilla 671: Added umask to procmail example.
3552 JJ/03 installed exipick 20100323.0, fixing doc bug
3554 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3555 directory. Notification and patch from Dan Rosenberg.
3557 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3559 TK/02 Improve log output when DKIM signing operation fails.
3561 MH/01 Treat the transport option dkim_domain as a colon separated
3562 list, not as a single string, and sign the message with each element,
3563 omitting multiple occurences of the same signer.
3565 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3566 Bugzilla 985, 986. Patch by Simon Arlott
3568 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3569 Patch by Simon Arlott
3571 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3572 MBX locking. Notification from Dan Rosenberg.
3578 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3580 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3582 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3584 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3586 NM/04 Bugzilla 915: Flag broken perl installation during build.
3592 TK/01 Added patch by Johannes Berg that expands the main option
3593 "spamd_address" if it starts with a dollar sign.
3595 TK/02 Write list of recipients to X-Envelope-Sender header when building
3596 the mbox-format spool file for content scanning (suggested by Jakob
3599 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3600 (http://www.dcc-servers.net/) support via dccifd. Activated by
3601 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3603 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3604 by Mark Daniel Reidel <mr@df.eu>.
3606 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3607 When building exim an external PCRE library is now needed -
3608 PCRE is a system library on the majority of modern systems.
3609 See entry on PCRE_LIBS in EDITME file.
3611 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3612 conversation. Added nologin parameter to request.
3613 Patch contributed by Kirill Miazine.
3615 TF/01 Do not log submission mode rewrites if they do not change the address.
3617 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3619 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3620 log files in place. Contributed by Roberto Lima.
3622 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3624 TF/03 Bugzilla 615: When checking the local_parts router precondition
3625 after a local_part_suffix or local_part_prefix option, Exim now
3626 does not use the address's named list lookup cache, since this
3627 contains cached lookups for the whole local part.
3629 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3630 Robert Millan. Documentation is in experimental-spec.txt.
3632 TF/04 Bugzilla 668: Fix parallel build (make -j).
3634 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3636 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3637 Patch provided by Jan Srzednicki.
3639 TF/05 Leading white space used to be stripped from $spam_report which
3640 wrecked the formatting. Now it is preserved.
3642 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3643 that they are available at delivery time.
3645 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3647 TF/08 TLS error reporting now respects the incoming_interface and
3648 incoming_port log selectors.
3650 TF/09 Produce a more useful error message if an SMTP transport's hosts
3651 setting expands to an empty string.
3653 NM/06 Bugzilla 744: EXPN did not work under TLS.
3654 Patch provided by Phil Pennock.
3656 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3657 Patch provided by Richard Godbee.
3659 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3660 acl_smtp_notquit, added index entry.
3662 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3663 Patch provided by Eugene Bujak.
3665 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3666 accept(). Patch provided by Maxim Dounin.
3668 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3669 Patch provided by Phil Pennock.
3671 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3673 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3674 Patch provided by Brad "anomie" Jorsch.
3676 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3677 Patch provided by Dean Brooks.
3679 TK/05 Add native DKIM support (does not depend on external libraries).
3681 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3682 Patch provided by Graeme Fowler.
3684 NM/16 Bugzilla 851: Documentation example syntax fix.
3686 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3688 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3691 NM/19 Bugzilla 745: TLS version reporting.
3692 Patch provided by Phil Pennock.
3694 NM/20 Bugzilla 167: bool: condition support.
3695 Patch provided by Phil Pennock.
3697 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3698 clients. Patch provided by Phil Pennock.
3700 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3701 Patch provided by Brad "anomie" Jorsch.
3703 NM/23 Bugzilla 687: Fix misparses in eximstats.
3704 Patch provided by Heiko Schlittermann.
3706 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3707 Patch provided by Heiko Schlittermann.
3709 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3710 plus update to original patch.
3712 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3714 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3715 Patch provided by David Brownlee.
3717 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3719 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3721 NM/30 Bugzilla 888: TLS documentation bugfixes.
3723 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3725 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3726 Unlike the original bugzilla I have changed all shell scripts in src tree.
3728 NM/33 Bugzilla 898: Transport filter timeout fix.
3729 Patch by Todd Rinaldo.
3731 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3732 Patch by Serge Demonchaux.
3734 NM/35 Bugzilla 39: Base64 decode bug fixes.
3735 Patch by Jakob Hirsch.
3737 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3739 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3741 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3743 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3749 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3750 ALT-N's libdkim that I have put here:
3751 http://duncanthrax.net/exim-experimental/
3753 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3754 were called 'true' and it seems that C99 defines that as a reserved
3755 keyword to be used with 'bool' variable types. That means you could
3756 not include C99-style headers which use bools without triggering
3757 build errors in sieve.c.
3759 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3760 as mailq or other aliases. Changed the --help handling significantly
3761 to do whats expected. exim_usage() emits usage/help information.
3763 SC/01 Added the -bylocaldomain option to eximstats.
3765 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3767 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3769 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3775 PH/01 Another patch from the Sieve maintainer.
3777 PH/02 When an IPv6 address is converted to a string for single-key lookup
3778 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3779 dots are used instead of colons so that keys in lsearch files need not
3780 contain colons. This was done some time before quoting was made available
3781 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3782 (notated using the quote facility) so as to distinguish them from IPv4
3783 keys. This meant that lookups for IP addresses in host lists did not work
3784 for iplsearch lookups.
3786 This has been fixed by arranging for IPv6 addresses to be expressed with
3787 colons if the lookup type is iplsearch. This is not incompatible, because
3788 previously such lookups could never work.
3790 The situation is now rather anomalous, since one *can* have colons in
3791 ordinary lsearch keys. However, making the change in all cases is
3792 incompatible and would probably break a number of configurations.
3794 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3797 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3798 conversion specification without a maximum field width, thereby enabling
3799 a rogue spamd server to cause a buffer overflow. While nobody in their
3800 right mind would setup Exim to query an untrusted spamd server, an
3801 attacker that gains access to a server running spamd could potentially
3802 exploit this vulnerability to run arbitrary code as the Exim user.
3804 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3805 $primary_hostname instead of what libspf2 thinks the hosts name is.
3807 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3808 a directory entry by the name of the lookup key. Previously, if a
3809 symlink pointed to a non-existing file or a file in a directory that
3810 Exim lacked permissions to read, a lookup for a key matching that
3811 symlink would fail. Now it is enough that a matching directory entry
3812 exists, symlink or not. (Bugzilla 503.)
3814 PH/03 The body_linecount and body_zerocount variables are now exported in the
3817 PH/04 Added the $dnslist_matched variable.
3819 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3820 This means they are set thereafter only if the connection becomes
3823 PH/06 Added the client_condition to authenticators so that some can be skipped
3824 by clients under certain conditions.
3826 PH/07 The error message for a badly-placed control=no_multiline_responses left
3827 "_responses" off the end of the name.
3829 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3831 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3832 (without spaces) instead of just copying the configuration text.
3834 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3836 PH/11 Added $max_received_linelength.
3838 PH/12 Added +ignore_defer and +include_defer to host lists.
3840 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3841 way in which PCRE > 7.0 is built.
3843 PH/14 Implemented queue_only_load_latch.
3845 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3846 MAIL command. The effect was to mangle the value on 64-bit systems.
3848 PH/16 Another patch from the Sieve maintainer.
3850 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3852 PH/18 If a system quota error occurred while trying to create the file for
3853 a maildir delivery, the message "Mailbox is full" was not appended to the
3854 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3855 only to a quota excession during the actual writing of the file.
3857 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3858 characters?) which causes problems in log lines. The DN values are now
3859 passed through string_printing() before being added to log lines.
3861 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3862 and InterBase are left for another time.)
3864 PH/21 Added message_body_newlines option.
3866 PH/22 Guard against possible overflow in moan_check_errorcopy().
3868 PH/23 POSIX allows open() to be a macro; guard against that.
3870 PH/24 If the recipient of an error message contained an @ in the local part
3871 (suitably quoted, of course), incorrect values were put in $domain and
3872 $local_part during the evaluation of errors_copy.
3878 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3879 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3882 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3883 issue a MAIL command.
3885 PH/02 In an ACL statement such as
3887 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3889 if a client was not listed at all, or was listed with a value other than
3890 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3891 the condition was not true (as it should be), so access was not denied.
3892 The bug was that the ! inversion was incorrectly passed on to the second
3893 item. This has been fixed.
3895 PH/03 Added additional dnslists conditions == and =& which are different from
3896 = and & when the dns lookup returns more than one IP address.
3898 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3899 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3901 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3902 FSYNC, which compiles an option called disable_fsync that allows for
3903 bypassing fsync(). The documentation is heavily laced with warnings.
3905 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3907 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3908 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3909 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3910 including adding "make clean"; (3) Added -fPIC when compiling the test
3911 dynamically loaded module, to get rid of a warning.
3913 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3914 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3915 = 0s. The bug is otherwise harmless.
3917 PH/07 There was a bug in the dovecot authenticator such that the value of
3918 $auth1 could be overwritten, and so not correctly preserved, after a
3919 successful authentication. This usually meant that the value preserved by
3920 the server_setid option was incorrect.
3922 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3924 PH/09 Installed PCRE release 7.0.
3926 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3927 run for batched SMTP input. It is now run at the start of every message
3928 in the batch. While fixing this I discovered that the process information
3929 (output by running exiwhat) was not always getting set for -bs and -bS
3930 input. This is fixed, and it now also says "batched" for BSMTP.
3932 PH/11 Added control=no_pipelining.
3934 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3935 patch, slightly modified), and move the expansion of helo_data till after
3936 the connection is made in the smtp transport (so it can use these
3939 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3941 PH/14 Added log_selector = +pid.
3943 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3945 PH/16 Add ${if forany and ${if forall.
3947 PH/17 Added dsn_from option to vary the From: line in DSNs.
3949 PH/18 Flush SMTP output before performing a callout, unless control =
3950 no_callout_flush is set.
3952 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3953 was true (the default) a successful delivery failed to delete the retry
3954 item, thus causing premature timeout of the address. The bug is now
3957 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3959 PH/21 Long custom messages for fakedefer and fakereject are now split up
3960 into multiline responses in the same way that messages for "deny" and
3961 other ACL rejections are.
3963 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3964 with slight modification.
3966 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3967 draft, changing the syntax and factoring some duplicate code".
3969 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3970 for deliveries of the second and subsequent messages over the same SMTP
3973 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3974 ${reduce, with only minor "tidies".
3976 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3978 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3979 expansion side effects.
3981 PH/27 When a message times out after an over-quota error from an Exim-imposed
3982 quota, the bounce message says "mailbox is full". This message was not
3983 being given when it was a system quota that was exceeded. It now should
3986 MH/03 Made $recipients available in local_scan(). local_scan() already has
3987 better access to the recipient list through recipients_list[], but
3988 $recipients can be useful in postmaster-provided expansion strings.
3990 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3991 in the case of a MAIL command with additional options following the
3992 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3993 were accidentally chopped off.
3995 PH/29 SMTP synchronization checks are implemented when a command is read -
3996 there is a check that no more input is waiting when there shouldn't be
3997 any. However, for some commands, a delay in an ACL can mean that it is
3998 some time before the response is written. In this time, more input might
3999 arrive, invalidly. So now there are extra checks after an ACL has run for
4000 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4001 pipelining has not been advertised.
4003 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4005 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4006 returned in the SMTP response when smtp_return_error_details was false.
4007 This has been fixed.
4009 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4010 instead of the C I/O that was originally supplied, because problems were
4011 reported on Solaris.
4013 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4014 Exim which did not show up earlier: it was assuming that a call to
4015 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4016 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4017 was a macro that became an assignment, so it seemed to work. This has
4018 changed to a proper function call with a void return, hence the compile
4019 error. Exim's code has been fixed.
4021 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4024 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4026 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4028 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4029 because it turns out to be too big or there is a timeout) there is no
4030 "Completed" line in the log. When some messages of this type were
4031 selected by exigrep, they were listed as "not completed". Others were
4032 picked up by some special patterns. I have improved the selection
4033 criteria to be more general.
4035 PH/38 The host_find_failed option in the manualroute router can now be set
4036 to "ignore", to completely ignore a host whose IP address cannot be
4037 found. If all hosts are ignored, the behaviour is controlled by the new
4038 host_all_ignored option.
4040 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4041 homing or because of multiple MX records with /mx) generated more than
4042 one IP address, and the following item turned out to be the local host,
4043 all the secondary addresses of the first item were incorrectly removed
4044 from the list, along with the local host and any following hosts (which
4045 is what is supposed to happen).
4047 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4048 whoever called Exim into the -H file. In the case of the daemon it was
4049 behaving confusingly. When first started, it used values for whoever
4050 started the daemon, but after a SIGHUP it used the Exim user (because it
4051 calls itself on a restart). I have changed the code so that it now always
4054 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4055 message are rejected with the same error (e.g. no authentication or bad
4056 sender address), and a DATA command is nevertheless sent (as can happen
4057 with PIPELINING or a stupid MUA), the error message that was given to the
4058 RCPT commands is included in the rejection of the DATA command. This is
4059 intended to be helpful for MUAs that show only the final error to their
4062 PH/42 Another patch from the Sieve maintainer.
4064 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4065 Eximstats - Fixed some broken HTML links and added missing column headers
4067 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4068 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4070 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4072 PH/43 Yet another patch from the Sieve maintainer.
4074 PH/44 I found a way to check for a TCP/IP connection going away before sending
4075 the response to the final '.' that terminates a message, but only in the
4076 case where the client has not sent further data following the '.'
4077 (unfortunately, this is allowed). However, in many cases there won't be
4078 any further data because there won't be any more messages to send. A call
4079 to select() can be used: if it shows that the input is "ready", there is
4080 either input waiting, or the socket has been closed. An attempt to read
4081 the next input character can distinguish the two cases. Previously, Exim
4082 would have sent an OK response which the client would never have see.
4083 This could lead to message repetition. This fix should cure that, at
4084 least in a lot of common cases.
4086 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4087 advertised in response to EHLO.
4093 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4094 fixed by 4.65/MH/01 (is this a record?) are fixed:
4096 (i) An empty string was always treated as zero by the numeric comparison
4097 operators. This behaviour has been restored.
4099 (ii) It is documented that the numeric comparison operators always treat
4100 their arguments as decimal numbers. This was broken in that numbers
4101 starting with 0 were being interpreted as octal.
4103 While fixing these problems I realized that there was another issue that
4104 hadn't been noticed. Values of message_size_limit (both the global option
4105 and the transport option) were treated as octal if they started with 0.
4106 The documentation was vague. These values are now always treated as
4107 decimal, and I will make that clear in the documentation.
4113 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4114 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4117 MH/01 Don't check that the operands of numeric comparison operators are
4118 integers when their expansion is in "skipping" mode (fixes bug
4119 introduced by 4.64-PH/07).
4121 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4122 child addresses, Exim now panics and dies. Previously, because the count
4123 is held in a short int, deliveries were likely to be lost. As such a
4124 large number of recipients for a single message is ridiculous
4125 (performance will be very, very poor), I have chosen to impose a limit
4126 rather than extend the field.
4132 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4133 leftover -K file (the existence of which was triggered by #402).
4134 While we were at it, introduced process PID as part of the -K
4135 filename. This should rule out race conditions when creating
4138 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4139 processing considerably. Previous code took too long for large mails,
4140 triggering a timeout which in turn triggers #401.
4142 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4143 in the DK code in transports.c. sendfile() is not really portable,
4144 hence the _LINUX specificness.
4146 TF/01 In the add_headers option to the mail command in an Exim filter,
4147 there was a bug that Exim would claim a syntax error in any
4148 header after the first one which had an odd number of characters
4151 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4152 callout verification, Exim cached a "reject" for the entire domain. This
4153 is correct for most verifications, but it is not correct for a recipient
4154 verification with use_sender or use_postmaster set, because in that case
4155 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4156 case of MAIL FROM:<> rejection from other early rejections (e.g.
4157 rejection of HELO). When verifying a recipient using a non-null MAIL
4158 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4159 Whatever the result of the callout, the value of the domain cache is
4160 left unchanged (for any other kind of callout, getting as far as trying
4161 RCPT means that the domain itself is ok).
4163 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4166 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4167 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4168 session, the daemon ignores ECONNECT errors and logs others; it now
4169 ignores EPIPE as well.
4171 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4172 (quoted-printable decoding).
4174 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4175 later the small subsequent patch to fix an introduced bug.
4177 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4179 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4181 PH/08 An error is now given if message_size_limit is specified negative.
4183 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4184 to be given (somewhat) arbitrary names.
4186 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4189 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4190 miscellaneous code fixes
4192 PH/10 Added the log_reject_target ACL modifier to specify where to log
4195 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4196 hostname. This is wrong, because it relates to the incoming message (and
4197 probably the interface on which it is arriving) and not to the outgoing
4198 callout (which could be using a different interface). This has been
4199 changed to use the value of the helo_data option from the smtp transport
4200 instead - this is what is used when a message is actually being sent. If
4201 there is no remote transport (possible with a router that sets up host
4202 addresses), $smtp_active_hostname is used.
4204 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4205 tweaks were necessary in order to get it to work (see also 21 below):
4206 (a) The code assumed that strncpy() returns a negative number on buffer
4207 overflow, which isn't the case. Replaced with Exim's string_format()
4209 (b) There were several signed/unsigned issues. I just did the minimum
4210 hacking in of casts. There is scope for a larger refactoring.
4211 (c) The code used strcasecmp() which is not a standard C function.
4212 Replaced with Exim's strcmpic() function.
4213 (d) The code set only $1; it now sets $auth1 as well.
4214 (e) A simple test gave the error "authentication client didn't specify
4215 service in request". It would seem that Dovecot has changed its
4216 interface. Fortunately there's a specification; I followed it and
4217 changed what the client sends and it appears to be working now.
4219 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4222 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4223 address A is aliased to B and C, where B exists and C does not. Without
4224 -v the output is "A verified" because verification stops after a
4225 successful redirection if more than one address is generated. However,
4226 with -v the child addresses are also verified. Exim was outputting "A
4227 failed to verify" and then showing the successful verification for C,
4228 with its parentage. It now outputs "B failed to verify", showing B's
4229 parentage before showing the successful verification of C.
4231 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4232 look up a TXT record in a specific list after matching in a combined
4235 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4236 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4237 they consult the DNS. I had assumed they would set it the way they
4238 wanted; and indeed my experiments on Linux seem to show that in some
4239 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4240 To be on the safe side, however, I have now made the interface to
4241 host_find_byname() similar to host_find_bydns(), with an argument
4242 containing the DNS resolver options. The host_find_byname() function now
4243 sets these options at its start, just as host_find_bydns() does. The smtp
4244 transport options dns_qualify_single and dns_search_parents are passed to
4245 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4246 of host_find_byname() use the default settings of RES_DEFNAMES
4247 (qualify_single) but not RES_DNSRCH (search_parents).
4249 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4250 spool_read_header() do less string testing, by means of a preliminary
4251 switch on the second character of optional "-foo" lines. (This is
4252 overdue, caused by the large number of possibilities that now exist.
4253 Originally there were few.) While I was there, I also converted the
4254 str(n)cmp tests so they don't re-test the leading "-" and the first
4255 character, in the hope this might squeeze out yet more improvement.
4257 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4258 flag allowing group syntax was set by the header_syntax check but not
4259 turned off, possible causing trouble later; (2) The flag was not being
4260 set at all for the header_verify test, causing "group"-style headers to
4261 be rejected. I have now set it in this case, and also caused header_
4262 verify to ignore an empty address taken from a group. While doing this, I
4263 came across some other cases where the code for allowing group syntax
4264 while scanning a header line wasn't quite right (mostly, not resetting
4265 the flag correctly in the right place). These bugs could have caused
4266 trouble for malformed header lines. I hope it is now all correct.
4268 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4269 with the "reply" argument non-NULL. The code, however (which originally
4270 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4271 but it didn't always do it. This confused somebody who was copying the
4272 code for some other use. I have removed all the tests.
4274 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4275 feature that was used to support insecure browsers during the U.S. crypto
4276 embargo. It requires special client support, and Exim is probably the
4277 only MTA that supported it -- and would never use it because real RSA is
4278 always available. This code has been removed, because it had the bad
4279 effect of slowing Exim down by computing (never used) parameters for the
4280 RSA_EXPORT functionality.
4282 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4283 authenticator to fail if there's a tab character in the incoming data
4284 (there should never be unless someone is messing about, as it's supposed
4285 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4286 if the connection is using TLS or if the remote IP is the same as the
4287 local IP, and the "valid-client-cert option" if a client certificate has
4290 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4291 authenticators. This can be used for authorization after authentication
4292 succeeds. (In the case of plaintext, it servers for both authentication
4295 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4296 if any retry times were supplied.
4298 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4299 connection, where there is no client IP address to check. In this
4300 situation, the verify now always succeeds.
4302 PH/25 Applied John Jetmore's -Mset patch.
4304 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4306 PH/27 In a string expansion for a processed (not raw) header when multiple
4307 headers of the same name were present, leading whitespace was being
4308 removed from all of them, but trailing whitespace was being removed only
4309 from the last one. Now trailing whitespace is removed from each header
4310 before concatenation. Completely empty headers in a concatenation (as
4311 before) are ignored.
4313 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4314 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4316 PH/29 [Removed. This was a change that I later backed out, and forgot to
4317 correct the ChangeLog entry (that I had efficiently created) before
4318 committing the later change.]
4320 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4321 address errors (4xx response to RCPT) over the same connection as other
4322 messages routed to the same hosts. Such deliveries are always "forced",
4323 so retry times are not inspected. This resulted in far too many retries
4324 for the affected addresses. The effect occurred only when there were more
4325 hosts than the hosts_max_try setting in the smtp transport when it had
4326 the 4xx errors. Those hosts that it had tried were not added to the list
4327 of hosts for which the message was waiting, so if all were tried, there
4328 was no problem. Two fixes have been applied:
4330 (i) If there are any address or message errors in an SMTP delivery, none
4331 of the hosts (tried or untried) are now added to the list of hosts
4332 for which the message is waiting, so the message should not be a
4333 candidate for sending over the same connection that was used for a
4334 successful delivery of some other message. This seems entirely
4335 reasonable: after all the message is NOT "waiting for some host".
4336 This is so "obvious" that I'm not sure why it wasn't done
4337 previously. Hope I haven't missed anything, but it can't do any
4338 harm, as the worst effect is to miss an optimization.
4340 (ii) If, despite (i), such a delivery is accidentally attempted, the
4341 routing retry time is respected, so at least it doesn't keep
4342 hammering the server.
4344 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4345 in ${readsocket because some servers need this prod.
4347 PH/32 Added some extra debug output when updating a wait-xxx database.
4349 PH/33 The hint "could be header name not terminated by colon", which has been
4350 given for certain expansion errors for a long time, was not being given
4351 for the ${if def:h_colon_omitted{... case.
4353 PH/34 The spec says: "With one important exception, whenever a domain list is
4354 being scanned, $domain contains the subject domain." There was at least
4355 one case where this was not true.
4357 PH/35 The error "getsockname() failed: connection reset by peer" was being
4358 written to the panic log as well as the main log, but it isn't really
4359 panic-worthy as it just means the connection died rather early on. I have
4360 removed the panic log writing for the ECONNRESET error when getsockname()
4363 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4364 runs only) independently of the message's sender address. This meant
4365 that, if the 4xx error was in fact related to the sender, a different
4366 message to the same recipient with a different sender could confuse
4367 things. In particular, this can happen when sending to a greylisting
4368 server, but other circumstances could also provoke similar problems.
4369 I have changed the default so that the retry time for these errors is now
4370 based a combination of the sender and recipient addresses. This change
4371 can be overridden by setting address_retry_include_sender=false in the
4374 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4375 remote server are returned as part of bounce messages. This was not
4376 happening for LMTP over a pipe (the lmtp transport), but now it is the
4377 same for both kinds of LMTP.
4379 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4380 in header lines that were in fact CNAMEs. This is no longer the case.
4382 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4383 and queue runs started by the daemon processed all messages. This has
4384 been fixed so that -R and -S can now usefully be given with -q<time>.
4386 PH/40 Import PCRE release 6.7 (fixes some bugs).
4388 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4390 PH/42 Give an error if -q is specified more than once.
4392 PH/43 Renamed the variables $interface_address and $interface_port as
4393 $received_ip_address and $received_port, to make it clear that these
4394 values apply to message reception, and not to the outgoing interface when
4395 a message is delivered. (The old names remain recognized, of course.)
4397 PH/44 There was no timeout on the connect() call when using a Unix domain
4398 socket in the ${readsocket expansion. There now is.
4400 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4401 be meaningful with "accept".
4403 SC/01 Eximstats V1.43
4404 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4406 SC/02 Eximstats V1.44
4407 Use a glob alias rather than an array ref in the generated
4408 parser. This improves both readability and performance.
4410 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4411 Collect SpamAssassin and rejection statistics.
4412 Don't display local sender or destination tables unless
4413 there is data to show.
4414 Added average volumes into the top table text output.
4416 SC/04 Eximstats V1.46
4417 Collect data on the number of addresses (recipients)
4418 as well as the number of messages.
4420 SC/05 Eximstats V1.47
4421 Added 'Message too big' to the list of mail rejection
4422 reasons (thanks to Marco Gaiarin).
4424 SC/06 Eximstats V1.48
4425 Mainlog lines which have GMT offsets and are too short to
4426 have a flag are now skipped.
4428 SC/07 Eximstats V1.49 (Alain Williams)
4429 Added the -emptyok flag.
4431 SC/08 Eximstats V1.50
4432 Fixes for obtaining the IP address from reject messages.
4434 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4435 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4436 whitespace changes from 4.64-PH/27
4438 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4441 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4442 are found, allow negative numbers in numeric criteria)
4444 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4446 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4447 to match changes made in 4.64-PH/43
4449 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4451 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4452 "domain" is actually an IP address, and force a failure. This locks out
4453 those revolvers/nameservers that support "A-for-A" lookups, in
4454 contravention of the specifications.
4456 PH/48 When a host name was looked up from an IP address, and the subsequent
4457 forward lookup of the name timed out, the host name was left in
4458 $sender_host_name, contrary to the specification.
4460 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4461 restricted to single-key lookups, Exim was not diagnosing an error if
4462 * or *@ was used with a query-style lookup.
4464 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4466 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4467 long ago, but noone interested enough thought of it. Let's just say that
4468 the "1.1" means that there are some new functions that weren't there at
4469 some point in the past.
4471 PH/51 Error processing for expansion failure of helo_data from an smtp
4472 transport during callout processing was broken.
4474 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4475 tested/used via the -bh/-bhc/-bs options.
4477 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4478 bug, fixed in subsequent PCRE releases).
4480 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4481 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4483 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4489 SC/01 Use a glob alias rather than an array ref in eximstats generated
4490 parser. This improves both readability and performance.
4492 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4493 Don't display local sender or destination tables in eximstats unless
4494 there is data to show.
4495 Added average volumes into the eximstats top table text output.
4497 SC/03 Collect data on the number of addresses (recipients) as well
4498 as the number of messages in eximstats.
4500 TF/01 Correct an error in the documentation for the redirect router. Exim
4501 does (usually) call initgroups() when daemonizing.
4503 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4504 with consistent privilege compared to when running as a daemon.
4506 TF/03 Note in the spec that $authenticated_id is not set for local
4507 submissions from trusted users.
4509 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4510 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4512 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4513 by adding some example configuration directives to the default
4514 configuration file. A little bit of work is required to uncomment the
4515 directives and define how usernames and passwords are checked, but
4516 there is now a framework to start from.
4518 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4519 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4520 without this. I don't know how relevant this is to other LDAP libraries.
4522 PH/02 Add the verb name to the "unknown ACL verb" error.
4524 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4526 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4528 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4529 directory not expanded when it should be if an expanded home directory
4530 was set for the address (which is overridden by the transport).
4532 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4535 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4536 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4537 because it is too late at that time, and has no effect.
4539 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4540 security issue with \' (bugzilla #107). I could not use the
4541 PQescapeStringConn() function, because it needs a PGconn value as one of
4544 PH/08 When testing addresses using -bt, indicate those final addresses that
4545 are duplicates that would not cause an additional delivery. At least one
4546 person was confused, thinking that -bt output corresponded to deliveries.
4547 (Suppressing duplicates isn't a good idea as you lose the information
4548 about possibly different redirections that led to the duplicates.)
4550 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4551 systems where poll() doesn't work, in particular OS X.
4553 PH/10 Added more information to debugging output for retry time not reached.
4555 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4556 operations in malware.c.
4558 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4561 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4562 syslog_duplication set false, log lines that would normally be written
4563 both the the main log and to the reject log were not written to syslog at
4566 PH/14 In the default configuration, change the use of "message" in ACL warn
4567 statements to "add_header".
4569 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4570 not followed by a command (e.g. "seen endif").
4572 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4573 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4576 PH/17 Added extra conditions to the default value of delay_warning_condition
4580 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4581 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4582 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4585 The Auto-Submitted: and various List- headers are standardised, whereas I
4586 don't think Precedence: ever was.
4588 PH/18 Refactored debugging code in route_finduser() to show more information,
4589 in particular, the error code if getpwnam() issues one.
4591 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4592 This is apparently needed in addition to the PH/07 change above to avoid
4593 any possible encoding problems.
4595 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4596 but not after initializing Perl.
4598 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4599 output them only if debugging. By default they are written stderr,
4600 apparently, which is not desirable.
4602 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4605 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4608 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4610 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4611 authenticated or an ident call has been made. Suppress the default
4612 values for $authenticated_id and $authenticated_sender (but permit -oMai
4613 and -oMas) when testing with -bh.
4615 PH/24 Re-jigged the order of the tests in the default configuration so that the
4616 tests for valid domains and recipients precede the DNS black list and CSA
4617 tests, on the grounds that those ones are more expensive.
4619 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4620 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4621 This bug exists in every version of Exim that I still have, right back to
4624 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4625 However, an attempt to turn on case-sensitivity in a regex key by
4626 including (?-i) didn't work because the subject string was already
4627 lowercased, and the effects were non-intuitive. It turns out that a
4628 one-line patch can be used to allow (?-i) to work as expected.
4634 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4635 other effects) broke the use of negated acl sub-conditions.
4637 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4640 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4641 "Deny" causes Exim to reject the incoming connection with a 554 error.
4642 Unfortunately, if there is a major crisis, such as a disk failure,
4643 tcp-wrappers gives "deny", whereas what one would like would be some
4644 kind of temporary error. A kludge has been added to help with this.
4645 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4646 554 error is used if errno is still zero or contains ENOENT (which occurs
4647 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4650 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4652 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4653 errors. Otherwise a message that provokes a temporary error (when other
4654 messages do not) can cause a whole host to time out.
4656 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4657 addresses were routed directly to files or pipes from a redirect router.
4658 File deliveries just didn't batch; pipe deliveries might have suffered
4661 PH/06 A failure to get a lock for a hints database would erroneously always say
4662 "Failed to get write lock", even when it was really a read lock.
4664 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4665 of 0600. This has been changed to use the value of the lockfile_mode
4666 option (which defaults to 0600).
4668 PH/08 Applied small patch from the Sieve maintainer.
4670 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4671 folder from quota calculations, a direct delivery into this folder messed
4672 up the contents of the maildirsize file. This was because the regex was
4673 used only to exclude .Trash (or whatever) when the size of the mailbox
4674 was calculated. There was no check that a delivery was happening into an
4675 excluded directory. This bug has been fixed by ignoring all quota
4676 processing for deliveries into excluded directories.
4678 PH/10 Added the maildirfolder_create_regex option to appendfile.
4684 PH/01 The code for finding all the local interface addresses on a FreeBSD
4685 system running IPv6 was broken. This may well have applied to all BSD
4686 systems, as well as to others that have similar system calls. The broken
4687 code found IPv4 interfaces correctly, but gave incorrect values for the
4688 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4689 that it would not match correctly against @[] and not recognize the IPv6
4692 PH/02 The ipliteral router was not recognizing addresses of the form user@
4693 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4695 PH/03 Added disable_ipv6.
4697 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4698 decoded form, because it is most often used to construct To: headers
4699 lines in autoreplies, and the decoded form may well be syntactically
4700 invalid. However, $reply_address has leading white space removed, and all
4701 newlines turned into spaces so that the autoreply transport does not
4704 PH/05 If group was specified without a user on a router, and no group or user
4705 was specified on a transport, the group from the router was ignored.
4707 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4708 for visible compile-time settings that can be used to change these
4709 numbers, for those that want even more. Backwards compatibility with old
4710 spool files has been maintained. However, going back to a previous Exim
4711 release will lost any variables that are in spool files.
4713 PH/07 Two small changes when running in the test harness: increase delay when
4714 passing a TCP/IP connection to a new process, in case the original
4715 process has to generate a bounce, and remove special handling of
4716 127.0.0.2 (sic), which is no longer necessary.
4718 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4719 be the same on different OS.
4721 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4724 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4725 whether --show-vars was specified or not
4727 JJ/02 exipick: Added support for new ACL variable spool format introduced
4730 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4731 syntactically invalid From: or Reply-to: line, and a filter used this to
4732 generate an autoreply, and therefore failed to obtain an address for the
4733 autoreply, Exim could try to deliver to a non-existent relative file
4734 name, causing unrelated and misleading errors. What now happens is that
4735 it logs this as a hard delivery error, but does not attempt to create a
4738 PH/11 The exinext utility has a -C option for testing purposes, but although
4739 the given file was scanned by exinext itself; it wasn't being passed on
4740 when Exim was called.
4742 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4743 an end-of-file indication when reading a command response.
4745 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4746 compiled. In many other places in Exim, IPv6 addresses are always
4747 recognized, so I have changed this. It also means that IPv4 domain
4748 literals of the form [IPV4:n.n.n.n] are now always recognized.
4750 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4751 used if the router is not running as root, for example, when verifying at
4752 ACL time, or when using -bh. The debugging output from this situation was
4753 non-existent - all you got was a failure to exec. I have made two
4756 (a) Failures to set uid/gid, the current directory, or a process leader
4757 in a subprocess such as that created by queryprogram now generate
4758 suitable debugging output when -d is set.
4760 (b) The queryprogram router detects when it is not running as root,
4761 outputs suitable debugging information if -d is set, and then runs
4762 the subprocess without attempting to change uid/gid.
4764 PH/15 Minor change to Makefile for building test_host (undocumented testing
4767 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4768 additional section of a DNS packet that returns MX or SRV records.
4769 Instead, it always explicitly searches for A/AAAA records. This avoids
4770 major problems that occur when a DNS server includes only records of one
4771 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4772 fixed another bug: if SRV records were looked up and the corresponding
4773 address records were *not* found in the additional section, the port
4774 values from the SRV records were lost.
4776 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4777 using the correct key (the original address) when searching the retry
4778 rules in order to find which one to use for generating the retry hint.
4780 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4781 adding the default one. Similarly, if it contains a Reply-To: header, the
4782 errors_reply_to option, if set, is not used.
4784 PH/19 When calculating a retry time, Exim used to measure the "time since
4785 failure" by looking at the "first failed" field in the retry record. Now
4786 it does not use this if it is later than than the arrival time of the
4787 message. Instead it uses the arrival time. This makes for better
4788 behaviour in cases where some deliveries succeed, thus re-setting the
4789 "first failed" field. An example is a quota failure for a huge message
4790 when small messages continue to be delivered. Without this change, the
4791 "time since failure" will always be short, possible causing more frequent
4792 delivery attempts for the huge message than are intended.
4793 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4795 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4796 $1, $2, $3) because the numerical variables can be reset during some
4797 expansion items (e.g. "match"), thereby losing the authentication data.
4799 PH/21 Make -bV show the size of off_t variables so that the test suite can
4800 decide whether to run tests for quotas > 2G.
4802 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4803 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4804 filecount value is greater than 2G or if a quota value is greater than 2G
4805 on a system where the size of off_t is not greater than 4, a panic error
4808 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4809 never match. The debug and -bh output now contains an explicit error
4810 message indicating a malformed IPv4 address or mask.
4812 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4813 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4814 PH/23 above applies.
4816 PH/25 Do not write to syslog when running in the test harness. The only
4817 occasion when this arises is a failure to open the main or panic logs
4818 (for which there is an explicit test).
4820 PH/26 Added the /no_tell option to "control=freeze".
4822 PH/27 If a host name lookup failed very early in a connection, for example, if
4823 the IP address matched host_lookup and the reverse lookup yielded a name
4824 that did not have a forward lookup, an error message of the form "no IP
4825 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4826 could be logged. Now it outputs the IP address instead of "NULL".
4828 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4829 allows the sender and the authenticated sender to be set when
4830 submitting a message from within Exim. Since child_open_exim() is
4831 documented for local_scan(), the new function should be too.
4833 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4834 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4835 results in an empty string is now treated as unset.
4837 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4839 PH/31 Added sender_verify_fail logging option.
4841 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4842 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4843 tidied the source and removed it altogether.
4845 PH/33 When a queue run was abandoned because the load average was too high, a
4846 log line was always written; now it is written only if the queue_run log
4847 selector is set. In addition, the log line for abandonment now contains
4848 information about the queue run such as the pid. This is always present
4849 in "start" and "stop" lines but was omitted from the "abandon" line.
4851 PH/34 Omit spaces between a header name and the colon in the error message that
4852 is given when verify = headers_syntax fails (if there are lots of them,
4853 the message gets confusing).
4855 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4856 names, as there are now some PTR records that contain slashes. This check
4857 is only to protect against broken name servers that fall over on strange
4858 characters, so the fact that it applies to all lookups doesn't matter.
4860 PH/36 Now that the new test suite is complete, we can remove some of the
4861 special code in Exim that was needed for the old test suite. For example,
4862 sorting DNS records because real resolvers return them in an arbitrary
4863 order. The new test suite's fake resolver always returns records in the
4866 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4867 bounces) except when queue_only is set, to avoid logging races between
4868 the different processes.
4870 PH/38 Panic-die if .include specifies a non-absolute path.
4872 PH/39 A tweak to the "H" retry rule from its user.
4874 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4875 a label. They prevented compilation on older perls.
4877 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4878 a warning to be raised on newish perls.
4880 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4881 on queue. Changes to match documented behaviour of showing count of
4882 messages matching specified criteria.
4884 PH/40 Changed the default ident timeout from 30s to 5s.
4886 PH/41 Added support for the use of login_cap features, on those BSD systems
4887 that have them, for controlling the resources used by pipe deliveries.
4889 PH/42 The content-scanning code uses fopen() to create files in which to put
4890 message data. Previously it was not paying any attention to the mode of
4891 the files. Exim runs with umask(0) because the rest of the code creates
4892 files with open(), and sets the required mode explicitly. Thus, these
4893 files were ending up world-writeable. This was not a big issue, because,
4894 being within the spool directory, they were not world-accessible. I have
4895 created a function called modefopen, which takes an additional mode
4896 argument. It sets umask(777), creates the file, chmods it to the required
4897 mode, then resets the umask. All the relevant calls to fopen() in the
4898 content scanning code have been changed to use this function.
4900 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4901 to 24 hours. This avoids potential overflow problems when processing G
4902 and H retry rules. I suspect nobody ever tinkers with this value.
4904 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4906 PH/45 When the plaintext authenticator is running as a client, the server's
4907 challenges are checked to ensure they are valid base64 strings. By
4908 default, the authentication attempt is cancelled if an invalid string is
4909 received. Setting client_ignore_invalid_base64 true ignores these errors.
4910 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4911 they are received. Thus, the responses can be made to depend on the
4912 challenges. If an invalid string is ignored, an empty string is placed in
4915 PH/46 Messages that are created by the autoreply transport now contains a
4916 References: header, in accordance with RFCs 2822 and 3834.
4918 PH/47 Added authenticated_sender_force to the smtp transport.
4920 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4922 PH/49 Installed latest patch from the Sieve maintainer.
4924 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4925 was also set, the appendfile transport was unnecessarily scanning a
4926 directory of message files (e.g. for maildir delivery) to find the count
4927 of files (along with the size), even though it did not need this
4928 information. It now does the scan only if it needs to find either the
4929 size of the count of files.
4931 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4933 PH/52 Two bugs concerned with error handling when the smtp transport is
4936 (i) Exim was not creating retry information for temporary errors given
4937 for individual recipients after the DATA command when the smtp transport
4938 was used in LMTP mode. This meant that they could be retried too
4939 frequently, and not timed out correctly.
4941 (ii) Exim was setting the flag that allows error details to be returned
4942 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4943 recipients that were returned after the DATA command.
4945 PH/53 This is related to PH/52, but is more general: for any failing address,
4946 when detailed error information was permitted to be returned to the
4947 sender, but the error was temporary, then after the final timeout, only
4948 "retry timeout exceeded" was returned. Now it returns the full error as
4949 well as "retry timeout exceeded".
4951 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4952 do this, and (what is worse) MTAs that accept it.
4954 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4955 will now be deprecated.
4957 PH/56 New os.c-cygwin from the Cygwin maintainer.
4959 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4960 formats (previously only available in exim formats via -bpr, -bpru,
4961 and -bpra. Now also available in native and exiqgrep formats)
4963 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4964 with very large, slow to parse queues
4966 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4968 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4970 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4971 responses to authentication challenges, though it was showing the
4972 challenges; (ii) I've removed the CR characters from the debug output for
4975 PH/58 Allow for the insertion of a newline as well as a space when a string
4976 is turned into more than one encoded-word during RFC 2047 encoding. The
4977 Sieve code now uses this.
4979 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4980 data_4xx, lost_connection, tls_required.
4982 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4983 message was being sent as an SMTP response.
4985 PH/61 Add -l and -k options to exicyclog.
4987 PH/62 When verifying, if an address was redirected to one new address, so that
4988 verification continued, and the new address failed or deferred after
4989 having set something in $address_data, the value of $address_data was not
4990 passed back to the ACL. This was different to the case when no
4991 redirection occurred. The value is now passed back in both cases.
4993 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4994 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4995 use login_cap.h, so on its own it isn't the distinguishing feature. The
4996 new name refers directly to the setclassresources() function.
4998 PH/65 Added configuration files for NetBSD3.
5000 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5002 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5003 is preferred over IPv4.
5005 PH/68 The bounce_return_message and bounce_return_body options were not being
5006 honoured for bounces generated during the reception of non-SMTP messages.
5007 In particular, this applied to messages rejected by the ACL. This bug has
5008 been fixed. However, if bounce_return_message is true and bounce_return_
5009 body is false, the headers that are returned for a non-SMTP message
5010 include only those that have been read before the error was detected.
5011 (In the case of an ACL rejection, they have all been read.)
5013 PH/69 The HTML version of the specification is now built in a directory called
5014 spec_html instead of spec.html, because the latter looks like a path with
5015 a MIME-type, and this confuses some software.
5017 PH/70 Catch two compiler warnings in sieve.c.
5019 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5020 function verify_get_ident() calls ip_connect() to connect a socket, but
5021 if the "connect()" function timed out, ip_connect() used to close the
5022 socket. However, verify_get_ident() also closes the socket later, and in
5023 between Exim writes to the log, which may get opened at this point. When
5024 the socket was closed in ip_connect(), the log could get the same file
5025 descriptor number as the socket. This naturally causes chaos. The fix is
5026 not to close the socket in ip_connect(); the socket should be closed by
5027 the function that creates it. There was only one place in the code where
5028 this was missing, in the iplookup router, which I don't think anybody now
5029 uses, but I've fixed it anyway.
5031 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5032 well as to direct DNS lookups. Otherwise the handling of names in host
5033 lists is inconsistent and therefore confusing.
5039 PH/01 Two changes to the default runtime configuration:
5041 (1) Move the checks for relay_from_hosts and authenticated clients from
5042 after to before the (commented out) DNS black list checks.
5044 (2) Add control=submission to the relay_from_hosts and authenticated
5045 clients checks, on the grounds that messages accepted by these
5046 statements are most likely to be submissions.
5048 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5050 (1) Generate an error if the third argument for the ${prvs expansion is
5053 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5056 (3) Reset the variables that are obtained from the first argument of
5057 ${prvscheck and used in the second argument before leaving the code,
5058 because their memory is reclaimed, so using them afterwards may do
5061 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5062 one (it's much easier than Tom thought :-).
5064 (5) Because of (4), we can now allow for the use of $prvscheck_result
5065 inside the third argument.
5067 PH/03 For some reason, the default setting of PATH when running a command from
5068 a pipe transport was just "/usr/bin". I have changed it to
5071 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5072 anything to be listed in the output from -bV.
5074 PH/05 When a filter generated an autoreply, the entire To: header line was
5075 quoted in the delivery log line, like this:
5077 => >A.N.Other <ano@some.domain> <original@ddress> ...
5079 This has been changed so that it extracts the operative address. There
5080 may be more than one such address. If so, they are comma-separated, like
5083 => >ano@some.domain,ona@other.domain <original@ddress> ...
5085 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5086 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5087 not being looked up in the rDNS to get a host name, Exim was showing the
5088 IP address twice in Received: lines, even though the IP addresses were
5089 identical. For example:
5091 Received: from [1.2.3.4] (helo=[1.2.3.4])
5093 However, if the real host name was known, it was omitting the HELO data
5094 if it matched the actual IP address. This has been tidied up so that it
5095 doesn't show the same IP address twice.
5097 PH/07 When both +timestamp and +memory debugging was on, the value given by
5098 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5099 called by the debug printing, thereby overwriting the timestamp buffer.
5100 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5102 PH/08 When the original message was included in an autoreply transport, it
5103 always said "this is a copy of the message, including all the headers",
5104 even if body_only or headers_only was set. It now gives an appropriate
5107 PH/09 Applied a patch from the Sieve maintainer which:
5109 o fixes some comments
5110 o adds the (disabled) notify extension core
5111 o adds some debug output for the result of if/elsif tests
5112 o points to the current vacation draft in the documentation
5113 and documents the missing references header update
5117 o fixes a bug in processing the envelope test (when testing
5118 multiple envelope elements, the last element determined the
5121 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5122 Electronic Mail") by including:
5124 Auto-submitted: auto-generated
5126 in the messages that it generates (bounce messages and others, such as
5127 warnings). In the case of bounce messages for non-SMTP messages, there was
5128 also a typo: it was using "Auto_submitted" (underscore instead of
5129 hyphen). Since every message generated by Exim is necessarily in response
5130 to another message, thes have all been changed to:
5132 Auto-Submitted: auto-replied
5134 in accordance with these statements in the RFC:
5136 The auto-replied keyword:
5138 - SHOULD be used on messages sent in direct response to another
5139 message by an automatic process,
5141 - MUST NOT be used on manually-generated messages,
5143 - MAY be used on Delivery Status Notifications (DSNs) and Message
5144 Disposition Notifications (MDNs),
5146 - MUST NOT be used on messages generated by automatic or periodic
5147 processes, except for messages which are automatic responses to
5150 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5151 to the default Received: header definition.
5153 PH/12 Added log selector acl_warn_skipped (default on).
5155 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5156 variables because (a) they are in the wrong storage pool and (b) even if
5157 they were copied, it wouldn't work properly because of the caching.
5159 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5160 checking when decoding. Apparently there are clients that generate
5161 overlong encoded strings. Why am I not surprised?
5163 PH/15 If the first argument of "${if match_address" was not empty, but did not
5164 contain an "@" character, Exim crashed. Now it writes a panic log message
5165 and treats the condition as false.
5167 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5169 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5170 extension "envelope-auth". The code is finished and in agreement with
5171 other implementations, but there is no documentation so far and in fact,
5172 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5173 not changing the active code.
5175 Print executed "if" and "elsif" statements when debugging is used. This
5176 helps a great deal to understand what a filter does.
5178 Document more things not specified clearly in RFC3028. I had all this
5179 sorted out, when out of a sudden new issues came to my mind. Oops."
5181 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5184 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5185 canonical form (as documented). However, after a host name lookup from
5186 the IP address, check_host() was doing a simple string comparison with
5187 addresses acquired from the DNS when checking that the found name did
5188 have the original IP as one of its addresses. Since any found IPv6
5189 addresses are likely to be in abbreviated form, the comparison could
5190 fail. Luckily, there already exists a function for doing the comparison
5191 by converting both addresses to binary, so now that is used instead of
5192 the text comparison.
5194 PH/20 There was another similar case to PH/19, when a complete host name was
5195 given in a host list; looking up its IP address could give an abbreviated
5196 form, whereas the current host's name might or might not be abbreviated.
5197 The same fix has been applied.
5203 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5204 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5207 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5208 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5210 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5212 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5213 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5214 Also, for "Auto-Submitted", treat anything other than "no" as
5215 non-personal, in accordance with RFC 3834. (Previously it treated
5216 anything starting "auto-" as non-personal.)
5218 TF/01 The control=submission/name=... option had a problem with syntax
5219 errors if the name included a slash character. The /name= option
5220 now slurps the rest of the string, so it can include any characters
5221 but it must come last in the list of options (after /sender_retain
5224 PH/05 Some modifications to the interface to the fake nameserver for the new
5232 TK/01 Added the "success_on_redirect" address verification option. See
5233 NewStuff for rationale and an example.
5235 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5237 PH/02 Patch to exigrep to allow it to work on syslog lines.
5239 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5240 fread() to skip over the body file's header line, because in Cygwin the
5241 header line is locked and is inaccessible.
5243 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5244 co-exist for some time) to make it clear that it is the Exim ID that is
5245 referenced, not the Message-ID: header line.
5247 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5248 string_format() function, because snprintf() does not exist on all
5251 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5252 ${stat: expansion item.
5254 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5255 protocol synchronization error", to keep the pedants happy.
5257 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5258 well as for IRIX systems, when gcc is being used. See the host.c source
5261 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5263 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5266 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5267 transport and to the smtp transport in LMTP mode.
5269 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5271 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5272 run a filter in a subprocess. This could lead to confusion in subsequent
5273 lookups in the parent process. There should also be a search_tidyup() at
5274 the end of the subprocess.
5276 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5277 only if the host matched helo_try_verify_hosts, which caused the
5278 verification to occur when the EHLO/HELO command was issued. The ACL just
5279 tested the remembered result. Now, if a previous verification attempt has
5280 not happened, "verify = helo" does it there and then.
5282 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5284 TK/03 Fix log output including CR from clamd.
5286 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5287 exist provoked a memory error which could cause a segfault.
5289 PH/15 Installed PCRE 6.2
5291 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5293 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5294 of the problem. Specifically, suggested +O2 rather than +O1 for the
5297 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5299 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5300 record, the port was not correctly logged when the outgoing_port log
5301 selector was set (it logged the transort's default port).
5303 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5304 fallback_hosts, and "hosts" in the smtp transport.
5306 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5307 host errors such as "Connection refused".
5309 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5310 authentication with radiusclient 0.4.9:
5312 - Error returned from rc_read_config was caught wrongly
5313 - Username/password not passed on to radius server due to wrong length.
5315 The presumption is that some radiusclient API changes for 4.51/PH/17
5316 were not taken care of correctly. The code is still untested by me (my
5317 Linux distribution still has 0.3.2 of radiusclient), but it was
5318 contributed by a Radius user.
5320 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5321 expanding the "port" option of the smtp transport.
5323 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5324 while reading a MIME header. Thanks to Tom Hughes for a patch.
5326 PH/24 Include config.h inside local_scan.h so that configuration settings are
5329 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5330 that in an ACL for RCPT (for example), you can examine exactly what was
5333 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5334 commands, but it was not correctly comparing the address with the actual
5335 client host address. Thus, it would show the EHLO address in Received:
5336 header lines when this was not necessary.
5338 PH/27 Added the % operator to ${eval:}.
5340 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5341 it should be ignoring failures (because with -C, for example, it has lost
5342 privilege). It wasn't ignoring creation failures other than "already
5345 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5348 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5349 because an input line was too long, either on its own, or by virtue of
5350 too many continuations, the temporary file was not being removed, and the
5351 return code was incorrect.
5353 PH/31 Missing "BOOL" in function definition in filtertest.c.
5355 PH/32 Applied Sieve patches from the maintainer.
5357 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5359 PH/33 Added "verify = not_blind".
5361 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5362 Local/Makefile (with some defaults set). These are used in built scripts
5363 such as exicyclog, but they have never been used in the exim_install
5364 script (though there are many overriding facilities there). I have
5365 arranged that the exim_install script now takes note of these two
5368 PH/35 Installed configuration files for Dragonfly.
5370 PH/36 When a locally submitted message by a trusted user did not contain a
5371 From: header, and the sender address was obtained from -f or from an SMTP
5372 MAIL command, and the trusted user did not use -F to supply a sender
5373 name, $originator_name was incorrectly used when constructing a From:
5374 header. Furthermore, $originator_name was used for submission mode
5375 messages from external hosts without From: headers in a similar way,
5376 which is clearly wrong.
5378 PH/37 Added control=suppress_local_fixups.
5380 PH/38 When log_selector = +received_sender was set, and the addition of the
5381 sender made the log line's construction buffer exactly full, or one byte
5382 less than full, an overflow happened when the terminating "\n" was
5385 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5386 when the result of a list match is failure because a DNS lookup failed.
5388 PH/40 RM_COMMAND is now used in the building process.
5390 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5391 the "build-* directories that it finds.
5393 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5394 address in a domain literal was a prefix of an interface address.
5396 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5397 when verifying a sender address, unless rewrite_headers is false.
5399 PH/44 Wrote a long comment about why errors_to addresses are verified as
5400 recipients, not senders.
5402 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5403 the ratelimit ACL was added.
5405 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5407 PH/46 Added extra information about PostgreSQL errors to the error string.
5409 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5410 avoiding the need to install special zones in a real server. This is
5411 backwards compatible; if it can't find the fake resolver, it drops back.
5412 Thus, both old and new test suites can be run.
5414 TF/02 Added util/ratelimit.pl
5416 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5417 clock is set back in time.
5419 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5420 Candler <B.Candler@pobox.com>.
5422 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5423 OK for addresses that are the result of redirections.
5425 PH/48 A number of further additions for the benefit of the new test suite,
5426 including a fake gethostbyname() that interfaces to the fake DNS resolver
5429 TF/06 The fix for widen_domains has also been applied to qualify_single and
5430 search_parents which are the other dnslookup options that can cause
5433 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5436 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5438 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5439 service" if it encountered an MX record with an empty target hostname.
5440 The message is now "an MX or SRV record indicated no SMTP service".
5442 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5443 if the DNS of the sending site is misconfigured. This is quite a
5444 common situation. This change restores the behaviour of treating a
5445 helo verification defer as a failure.
5447 PH/51 If self=fail was set on a router, the bounce message did not include the
5448 actual error message.
5454 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5456 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5457 command itself ended in error, the underlying message about the transport
5458 filter timeout was being overwritten with the pipe command error. Now the
5459 underlying error message should be appended to the second error message.
5461 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5463 PH/02 Reduce the amount of output that "make" produces by default. Full output
5464 can still be requested.
5466 PH/03 The warning log line about a condition test deferring for a "warn" verb
5467 was being output only once per connection, rather than after each
5468 occurrence (because it was using the same function as for successful
5469 "warn" verbs). This seems wrong, so I have changed it.
5471 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5472 it should not have, which might have caused a crash in the right
5473 circumstances, but probably never did.
5475 PH/04 Installed a modified version of Tony Finch's patch to make submission
5476 mode fix the return path as well as the Sender: header line, and to
5477 add a /name= option so that you can make the user's friendly name appear
5480 TF/03 Added the control = fakedefer ACL modifier.
5482 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5483 Mark Lowes for thorough testing.
5485 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5487 TK/03 Merged latest SRS patch from Miles Wilton.
5489 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5490 with the definition in sysexits.h (which is #included earlier).
5491 Fortunately, Exim does not actually use EX_OK. The code used to try to
5492 preserve the sysexits.h value, by assuming that macro definitions were
5493 scanned for macro replacements. I have been disabused of this notion,
5494 so now the code just undefines EX_OK before #including unistd.h.
5496 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5497 in the smtp transport. When a block could not be written in a single
5498 write() function, the timeout was being re-applied to each part-write.
5499 This seems wrong - if the receiver was accepting one byte at a time it
5500 would take for ever. The timeout is now adjusted when this happens. It
5501 doesn't have to be particularly precise.
5503 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5504 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5506 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5507 without a domain if the check to <postmaster@domain> fails.
5509 SC/01 Eximstats: added -xls and the ability to specify output files
5510 (patch written by Frank Heydlauf).
5512 SC/02 Eximstats: use FileHandles for outputting results.
5514 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5516 SC/04 Eximstats: fixed display of large numbers with -nvr option
5518 SC/05 Eximstats: fixed merging of reports with empty tables.
5520 SC/06 Eximstats: added the -include_original_destination flag
5522 SC/07 Eximstats: removed tabs and trailing whitespace.
5524 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5526 TK/06 MBOX spool code: Add real "From " MBOX separator line
5527 so the .eml file is really in mbox format (even though
5528 most programs do not really care). Patch from Alex Miller.
5530 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5531 The latter is generated from $received_to and is only set if the
5532 message has one envelope recipient. SA can use these headers,
5533 obviously out-of-the-box. Patch from Alex Miller.
5535 PH/08 The ${def test on a variable was returning false if the variable's
5536 value was "0", contrary to what the specification has always said!
5537 The result should be true unless the variable is empty.
5539 PH/09 The syntax error of a character other than { following "${if
5540 def:variable_name" (after optional whitespace) was not being diagnosed.
5541 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5542 accidental colon was present, for example, could give incorrect results.
5544 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5545 result is used (not including appendfile, where other changes are about
5548 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5549 This involved changing a lot of size variables from int to off_t. It
5550 should work with maildirs and everything.
5552 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5553 spamd dying while we are connected to it.
5555 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5558 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5559 function for BDB 4.3.
5561 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5563 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5564 the sources for PCRE have been re-arranged and more files are now
5567 PH/15 The code I had for printing potentially long long variables in PH/11
5568 above was not the best (it lost precision). The length of off_t variables
5569 is now inspected at build time, and an appropriate printing format (%ld
5570 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5571 to be "long long int" or "long int". This is needed for the internal
5572 formatting function string_vformat().
5574 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5575 the configuration file to be ":syslog", then the script "guesses" where
5576 the logs files are, rather than using the compiled in default. In our
5577 case the guess is not the same as the compiled default, so the script
5578 suddenly stopped working when I started to use syslog. The patch checks
5579 to see if log_file_path is "". If so, it attempts to read it from exim
5580 with no configuration file to get the compiled in version, before it
5581 falls back to the previous guessing code."
5583 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5584 implementing BATV in an Exim configuration. See NewStuff for the gory
5587 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5588 Makefile that are specific to HP-UX.
5590 PH/18 If the "use_postmaster" option was set for a recipient callout together
5591 with the "random" option, the postmaster address was used as the MAIL
5592 FROM address for the random test, but not for the subsequent recipient
5593 test. It is now used for both.
5595 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5596 patch removes a few documentation additions to RFC 3028, because the
5597 latest draft now contains them. It adds the new en;ascii-case comparator
5598 and a new error check for 8bit text in MIME parts. Comparator and
5599 require names are now matched exactly. I enabled the subaddress
5600 extension, but it is not well tested yet (read: it works for me)."
5602 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5603 rework some of the code of TK/09 above to avoid the hardwired use of
5604 "%lld" and "long long". Replaced the call to snprintf() with a call to
5607 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5608 records point to non-existent hosts", "retry timeout exceeded", and
5609 "retry time not reached for any host after a long failure period".
5611 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5612 experimental DomainKeys support:
5614 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5615 (2) On an error such as an illegally used "control", the wrong name for
5616 the control was given.
5618 These problems did NOT occur unless DomainKeys support was compiled.
5620 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5622 PH/24 Added ${if match_ip condition.
5624 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5625 databases so that it will be absolutely obvious if a crash occurs in the
5626 DB library. This is a regular occurrence (often caused by mis-matched
5629 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5630 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5631 picked up on a user's system that detects such things. There doesn't seem
5632 to be a gcc warning option for this - only an attribute that has to be
5633 put on the function's prototype. It seems that in Fedora Core 4 they have
5634 set this on a number of new functions. No doubt there will be more in due
5637 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5638 specify a transport. However, if an address that was verified by such a
5639 router was the subject of a callout, Exim crashed because it tried to
5640 read the rcpt_include_affixes from the non-existent transport. Now it
5641 just assumes that the setting of that option is false. This bug was
5642 introduced by 4.51/PH/31.
5644 PH/28 Changed -d+all to exclude +memory, because that information is very
5645 rarely of interest, but it makes the output a lot bigger. People tend to
5646 do -d+all out of habit.
5648 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5649 code in os-type was giving problems when libc.so lives in lib64, like on
5652 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5653 aren't the modern standard, and it seems that some systems' include files
5654 don't always have them. Exim was already checking for some of the newer
5655 ones like T_AAAA, and defining it itself. I've added checks for all the
5656 record types that Exim uses.
5658 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5659 not automatically generating a new one, as it is supposed to. This
5660 prevented TLS from working. If the file did exist, but contained invalid
5661 data, a new version was generated, as expected. It was only the case of a
5662 non-existent file that was broken.
5664 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5665 with a change in libdomainkeys > 0.64.
5667 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5668 from DNS. If the selector record carries the flag, it now has
5669 precedence over the domain-wide flag.
5671 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5673 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5674 the use of a port name that isn't defined in /etc/services) occurred, the
5675 message was deferred as in a normal delivery, and thus remained on the
5676 spool, instead of being failed because of the mua_wrapper setting. This
5677 is now fixed, and I tidied up some of the mua_wrapper messages at the
5680 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5681 the messages in a hash of arrays rather than using individual hashes.
5682 This is a bit cleaner and results in dramatic memory savings, albeit
5683 at a slight CPU cost.
5685 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5686 as requested by Marc Sherman.
5688 SC/10 Eximstats: added histograms for user specified patterns as requested
5691 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5693 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5694 fopen() in the content-scanning modules that did not already have it.
5700 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5701 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5703 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5705 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5707 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5708 to test Sieve filters that use "vacation".
5710 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5711 that changes the way the GnuTLS parameters are stored in the cache file.
5712 The new format can be generated externally. For backward compatibility,
5713 if the data in the cache doesn't make sense, Exim assumes it has read an
5714 old-format file, and it generates new data and writes a new file. This
5715 means that you can't go back to an older release without removing the
5718 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5719 work if there are any delivery delays because "one_time" forces the
5720 parent to be marked "delivered", so its unseen clone is never tried
5721 again. For this reason, Exim now forbids the simultaneous setting of
5724 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5725 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5726 entry if you want to know the details. The fix, however, neglected to
5727 consider the case when local delivery batching is involved. The test for
5728 "previously delivered" was not happening when checking to see if an
5729 address could be batched with a previous (undelivered) one; under
5730 certain circumstances this could lead to multiple deliveries to the same
5733 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5734 in its include files, and this causes problems building Exim.
5736 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5737 header_syntax) but Exim was just ignoring anything given after a slash.
5738 In particular, this caused confusion with an attempt to use "verify =
5739 reverse_host_lookup/defer_ok". An error is now given when options are
5740 supplied for verify items that do not have them. (Maybe reverse_host_
5741 lookup should have a defer_ok option, but that's a different point.)
5743 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5744 defined by RFC 821) to 2048, because there were problems with some AUTH
5745 commands, and RFC 1869 says the size should be increased for extended
5746 SMTP commands that take arguments.
5748 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5751 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5752 "unknown" error; now it says that the functionality isn't in the binary.
5754 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5755 an address' error message when a string expansion fails (syntax or
5756 whatever). Otherwise the password may appear in the log. Following change
5757 PH/42 below, there is no longer a chance of it appearing in a bounce
5760 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5762 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5763 of its addresses was ever tried. (Bugzilla bug #2.)
5765 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5766 the result incorrectly in the debug output. (It correctly added a newline
5767 to what was transported.)
5769 TF/01 Added $received_time.
5771 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5772 commented out examples of how to interface to a virus scanner and to
5773 SpamAssassin. Also added commented examples of av_scanner and
5774 spamd_address settings.
5776 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5777 and controls are allowed in which ACLs. There were a couple of minor
5778 errors. Some of the entries in the conditions table (which is a table of
5779 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5780 negation of where the condition IS allowed.
5782 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5784 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5785 header file does not have a version number, so I've had to invent a new
5786 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5787 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5788 radiusclient), but it was contributed by a Radius user.
5790 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5791 files or directories, for OpenSSL.
5793 PH/19 When an Exim process that is running as root has to create an Exim log
5794 file, it does so in a subprocess that runs as exim:exim so as to get the
5795 ownership right at creation (otherwise, other Exim processes might see
5796 the file with the wrong ownership). There was no test for failure of this
5797 fork() call, which would lead to the process getting stuck as it waited
5798 for a non-existent subprocess. Forks do occasionally fail when resources
5799 run out. I reviewed all the other calls to fork(); they all seem to check
5802 PH/20 When checking for unexpected SMTP input at connect time (before writing
5803 the banner), Exim was not dealing correctly with a non-positive return
5804 from the read() function. If the client had disconnected by this time,
5805 the result was a log entry for a synchronization error with an empty
5806 string after "input=" when read() returned zero. If read() returned -1
5807 (an event I could not check), uninitialized data bytes were printed.
5808 There were reports of junk text (parts of files, etc) appearing after
5811 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5813 PH/22 Added support for macro redefinition, and (re)definition in between
5814 driver and ACL definitions.
5816 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5817 forgetting to use the resulting value; it was using the unexpanded value.
5819 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5820 hadn't been configured. The fix is from Juergen Kreileder, who
5821 understands it better than I do:
5823 "Here's what I see happening with three configured cyrus_sasl
5824 authenticators configured (plain, login, cram-md5):
5826 On startup auth_cyrus_sasl_init() gets called for each of these.
5827 This means three calls to sasl_listmech() without a specified mech_list.
5828 => SASL tests which mechs of all available mechs actually work
5829 => three warnings about OTP not working
5830 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5832 With the patch, sasl_listmech() also gets called three times. But now
5833 SASL's mech_list option is set to the server_mech specified in the the
5834 authenticator. Or in other words, the answer from sasl_listmech()
5835 gets limited to just the mech you're testing for (which is different
5837 => the return list contains just 'plain' or 'login', 'cram-md5' or
5838 nothing depending on the value of ob->server_mech.
5840 I've just tested the patch: Authentication still works fine,
5841 unavailable mechs specified in the exim configuration are still
5842 caught, and the auth.log warnings about OTP are gone."
5844 PH/25 When debugging is enabled, the contents of the command line are added
5845 to the debugging output, even when log_selector=+arguments is not
5848 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5849 answer is "GNU", and only if the return is "GNU/something" is the answer
5852 PH/27 $acl_verify_message is now set immediately after the failure of a
5853 verification in an ACL, and so is available in subsequent modifiers. In
5854 particular, the message can be preserved by coding like this:
5856 warn !verify = sender
5857 set acl_m0 = $acl_verify_message
5859 Previously, $acl_verify_message was set only while expanding "message"
5860 and "log_message" when a very denied access.
5862 PH/28 Modified OS/os.c-Linux with
5864 -#ifndef OS_LOAD_AVERAGE
5865 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5867 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5868 nomenclature these days.)
5870 PH/29 Installed patch from the Sieve maintainer that adds the options
5871 sieve_useraddress and sieve_subaddress to the redirect router.
5873 PH/30 In these circumstances:
5874 . Two addresses routed to the same list of hosts;
5875 . First host does not offer TLS;
5876 . First host accepts first address;
5877 . First host gives temporary error to second address;
5878 . Second host offers TLS and a TLS session is established;
5879 . Second host accepts second address.
5880 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5881 and peerdn, if requested) that were in fact used only for the second
5884 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5885 attention to any local part prefix or suffix that was matched by the
5886 router that accepted the address. It now behaves in the same way as it
5887 does for delivery: the affixes are removed from the local part unless
5888 rcpt_include_affixes is set on the transport.
5890 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5891 timeout during the DATA phase of an incoming message.
5893 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5894 applied a patch sanctioned by the Sieve maintainer.
5896 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5897 the uid or gid is negative. A case of a negative gid caused this to be
5898 noticed. The fix allows for either to be negative.
5900 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5901 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5904 PH/36 The change PH/12 above was broken. Fixed it.
5906 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5907 the grounds that routing the same address twice would always produce the
5908 same answer. This might have been true once, but it is certainly no
5909 longer true now. Routing a child address may depend on the previous
5910 routing that produced that child. Some complicated redirection strategies
5911 went wrong when messages had multiple recipients, and made Exim's
5912 behaviour dependent on the order in which the addresses were given.
5914 I have moved the duplicate checking until after the routing is complete.
5915 Exim scans the addresses that are assigned to local and remote
5916 transports, and removes any duplicates. This means that more work will be
5917 done, as duplicates will always all be routed, but duplicates are
5918 presumably rare, so I don't expect this is of any significance.
5920 For deliveries to pipes, files, and autoreplies, the duplicate checking
5921 still happens during the routing process, since they are not going to be
5924 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5925 It corrects a timeout issue with spamd. This is Ian's comment: "The
5926 background is that sometimes spamd either never reads data from a
5927 connection it has accepted, or it never writes response data. The exiscan
5928 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5929 blindly assumes that writes won't block so it may never time out."
5931 PH/39 Allow G after quota size as well as K and M.
5933 PH/40 The value set for $authenticated_id in an authenticator may not contain
5934 binary zeroes or newlines because the value is written to log lines and
5935 to spool files. There was no check on this. Now the value is run through
5936 the string_printing() function so that such characters are converted to
5937 printable escape sequences.
5939 PH/41 $message_linecount is a new variable that contains the total number of
5940 lines in the message. Compare $body_linecount, which is the count for the
5943 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5944 bounce and delay warning messages, except in certain special cases, which
5947 (a) An SMTP error message from a remote host;
5948 (b) A message specified in a :fail: redirection;
5949 (c) A message specified in a "fail" command in a system filter;
5950 (d) A message specified in a FAIL return from the queryprogram router;
5951 (e) A message specified by the cannot_route_message router option.
5953 In these cases only, Exim does include the error details in bounce and
5954 warning messages. There are also a few cases where bland messages such
5955 as "unrouteable address" or "local delivery error" are given.
5957 PH/43 $value is now also set for the "else" part of a ${run expansion.
5959 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5960 being worked on, but at least Exim now implements the latest version to
5963 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5964 process to complete was treated as a delivery failure, a timeout while
5965 writing the message to the pipe was logged, but erroneously treated as a
5966 successful delivery. Such timeouts include transport filter timeouts. For
5967 consistency with the overall process timeout, these timeouts are now
5968 treated as errors, giving rise to delivery failures by default. However,
5969 there is now a new Boolean option for the pipe transport called
5970 timeout_defer, which, if set TRUE, converts the failures into defers for
5971 both kinds of timeout. A transport filter timeout is now identified in
5974 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5975 systems where "make" and "gmake" are different, calling "gmake" at top
5976 level broke things. I've arranged for the value of $(MAKE) to be passed
5977 from the Makefile to this script so that it can call the same version of
5981 A note about Exim versions 4.44 and 4.50
5982 ----------------------------------------
5984 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5985 changes of various kinds. As a consequence, a big documentation update was
5986 needed. This delayed the release for rather longer than seemed good, especially
5987 in the light of a couple of (minor) security issues. Therefore, the changes
5988 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5989 release. So 4.44 and 4.50 are in effect two different branches that both start
5992 I have left the 4.50 change log unchanged; it contains all the changes since
5993 4.43. The change log for 4.44 is below; many of its items are identical to
5994 those for 4.50. This seems to be the most sensible way to preserve the
5995 historical information.
6001 1. Minor wording change to the doc/README.SIEVE file.
6003 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6004 computation of the current number of files was incorrect.
6006 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6007 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6010 4. Give more explanation in the error message when the command for a transport
6011 filter fails to execute.
6013 5. There are several places where Exim runs a non-Exim command in a
6014 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6015 was being done only for the command run by the queryprogram router. It is
6016 now done for all such subprocesses. The other cases are: ${run, transport
6017 filters, and the commands run by the lmtp and pipe transports.
6019 6. Added CONFIGURE_GROUP build-time option.
6021 7. Some older OS have a limit of 256 on the maximum number of file
6022 descriptors. Exim was using setrlimit() to set 1000 as a large value
6023 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6024 systems. I've change it so that if it can't get 1000, it tries for 256.
6026 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6027 was an oversight, and furthermore, ever since the addition of extra
6028 controls (e.g. 4.43/32), the checks on when to allow different forms of
6029 "control" were broken. There should now be diagnostics for all cases when a
6030 control that does not make sense is encountered.
6032 9. Added the /retain_sender option to "control=submission".
6034 10. $recipients is now available in the predata ACL (oversight).
6036 11. Tidy the search cache before the fork to do a delivery from a message
6037 received from the command line. Otherwise the child will trigger a lookup
6038 failure and thereby defer the delivery if it tries to use (for example) a
6039 cached ldap connection that the parent has called unbind on.
6041 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6042 of $address_data from the recipient verification was clobbered by the
6043 sender verification.
6045 13. The value of address_data from a sender verification is now available in
6046 $sender_address_data in subsequent conditions in the ACL statement.
6048 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6050 15. Added a new option "connect=<time>" to callout options, to set a different
6053 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6054 was its contents. (It was OK if the option was not defined at all.)
6056 17. A "Completed" log line is now written for messages that are removed from
6057 the spool by the -Mrm option.
6059 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6060 information about exactly what failed.
6062 19. Added -dd to debug only the daemon process.
6064 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6065 handles timeouts, both on the server side and network timeouts. Renamed the
6066 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6068 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6069 It is now set to "smtps".
6071 22. $host_address is now set to the target address during the checking of
6072 ignore_target_hosts.
6074 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6075 being passed; this would have caused $sender_host_name to have been used if
6076 matching the list had actually called for a host name (not very likely,
6077 since this list is usually IP addresses). A host name is now passed as
6080 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6081 code that specifies a non-restarting handler (typically sigaction() in
6082 modern systems) in an attempt to fix a rare and obscure crash bug.
6084 25. Narrowed the window for a race in the daemon that could cause it to ignore
6085 SIGCHLD signals. This is not a major problem, because they are used only to
6086 wake it up if nothing else does.
6088 26. A malformed maildirsize file could cause Exim to calculate negative values
6089 for the mailbox size or file count. Odd effects could occur as a result.
6090 The maildirsize information is now recalculated if the size or filecount
6093 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6094 support for a long time. Removed HAVE_SYS_VFS_H.
6096 28. Installed the latest version of exipick from John Jetmore.
6098 29. In an address list, if the pattern was not a regular expression, an empty
6099 subject address (from a bounce message) matched only if the pattern was an
6100 empty string. Non-empty patterns were not even tested. This was the wrong
6101 because it is perfectly reasonable to use an empty address as part of a
6102 database query. An empty address is now tested by patterns that are
6103 lookups. However, all the other forms of pattern expect the subject to
6104 contain a local part and a domain, and therefore, for them, an empty
6105 address still always fails if the pattern is not itself empty.
6107 30. Exim went into a mad DNS loop when attempting to do a callout where the
6108 host was specified on an smtp transport, and looking it up yielded more
6109 than one IP address.
6111 31. Re-factored the code for checking spool and log partition space into a
6112 function that finds that data and another that does the check. The former
6113 is then used to implement four new variables: $spool_space, $log_space,
6114 $spool_inodes, and $log_inodes.
6116 32. The RFC2047 encoding function was originally intended for short strings
6117 such as real names; it was not keeping to the 75-character limit for
6118 encoded words that the RFC imposes. It now respects the limit, and
6119 generates multiple encoded words if necessary. To be on the safe side, I
6120 have increased the buffer size for the ${rfc2047: expansion operator from
6123 33. It is now permitted to omit both strings after an "if" condition; if the
6124 condition is true, the result is "true". As before, when the second string
6125 is omitted, a false condition yields an empty string. This makes it less
6126 cumbersome to write custom ACL and router conditions.
6128 34. Failure to deliver a bounce message always caused it to be frozen, even if
6129 there was an errors_to setting on the router. The errors_to setting is now
6132 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6133 canonical form (fully expanded) before being placed in
6134 $sender_host_address.
6136 36. The table in the code that translates DNS record types into text (T_A to
6137 "A" for instance) was missing entries for NS and CNAME. It is just possible
6138 that this could have caused confusion if both these types were looked up
6139 for the same domain, because the text type is used as part of Exim's
6140 per-process caching. But the chance of anyone hitting this buglet seems
6143 37. The dnsdb lookup has been extended in a number of ways.
6145 (1) There is a new type, "zns", which walks up the domain tree until it
6146 finds some nameserver records. It should be used with care.
6148 (2) There is a new type, "mxh", which is like "mx" except that it returns
6149 just the host names, not the priorities.
6151 (3) It is now possible to give a list of domains (or IP addresses) to be
6152 looked up. The behaviour when one of the lookups defers can be
6153 controlled by a keyword.
6155 (4) It is now possible to specify the separator character for use when
6156 multiple records are returned.
6158 38. The dnslists ACL condition has been extended: it is now possible to supply
6159 a list of IP addresses and/or domains to be looked up in a particular DNS
6162 39. Added log_selector=+queue_time_overall.
6164 40. When running the queue in the test harness, wait just a tad after forking a
6165 delivery process, to get repeatability of debugging output.
6167 41. Include certificate and key file names in error message when GnuTLS fails
6168 to set them up, because the GnuTLS error message doesn't include the name
6169 of the failing file when there is a problem reading it.
6171 42. Allow both -bf and -bF in the same test run.
6173 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6175 44. The "Exiscan patch" is now merged into the mainline Exim source.
6177 45. Sometimes the final signoff response after QUIT could fail to get
6178 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6179 < 0 before doing a fflush(). This bug looks as though it goes back to the
6180 introduction of TLS in release 3.20, but "sometimes" must have been rare
6181 because the tests only now provoked it.
6183 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6184 (this can affect the format of dates).
6186 47. exim_tidydb, when checking for the continued existence of a message for
6187 which it has found a message-specific retry record, was not finding
6188 messages that were in split spool directories. Consequently, it was
6189 deleting retry records that should have stayed in existence.
6191 48. Steve fixed some bugs in eximstats.
6193 49. The SPA authentication driver was not abandoning authentication and moving
6194 on to the next authenticator when an expansion was forced to fail,
6195 contradicting the general specification for all authenticators. Instead it
6196 was generating a temporary error. It now behaves as specified.
6198 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6199 (the order specifies the preference for clients). The order is now AES256,
6200 AES128, 3DES, ARCFOUR128.
6202 51. Small patch to Sieve code - explicitly set From: when generating an
6205 52. Exim crashed if a remote delivery caused a very long error message to be
6206 recorded - for instance if somebody sent an entire SpamAssassin report back
6207 as a large number of 550 error lines. This bug was coincidentally fixed by
6208 increasing the size of one of Exim's internal buffers (big_buffer) that
6209 happened as part of the Exiscan merge. However, to be on the safe side, I
6210 have made the code more robust (and fixed the comments that describe what
6213 53. Now that there can be additional text after "Completed" in log lines (if
6214 the queue_time_overall log selector is set), a one-byte patch to exigrep
6215 was needed to allow it to recognize "Completed" as not the last thing in
6218 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6219 patch that reportedly fixes this has been added. I am not expert enough to
6220 create a test for it. This is what the patch creator wrote:
6222 "I found a little strange behaviour of ldap code when working with
6223 Windows 2003 AD Domain, where users was placed in more than one
6224 Organization Units. When I tried to give exim partial DN, the exit code
6225 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6226 But simultaneously result of request was absolutely normal ldap result,
6227 so I produce this patch..."
6229 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6230 REFERENCE, so I have modified the code to exclude the patch when that macro
6233 55. Some experimental protocols are using DNS PTR records for new purposes. The
6234 keys for these records are domain names, not reversed IP addresses. The
6235 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6236 leaves it alone. Component reversal etc. now happens only for IP addresses.
6239 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6241 57. Double the size of the debug message buffer (to 2048) so that more of very
6242 long debug lines gets shown.
6244 58. The exicyclog utility now does better if the number of log files to keep
6245 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6247 59. Two changes related to the smtp_active_hostname option:
6249 (1) $smtp_active_hostname is now available as a variable.
6250 (2) The default for smtp_banner uses $smtp_active_hostname instead
6251 of $primary_hostname.
6253 60. The host_aton() function is supposed to be passed a string that is known
6254 to be a valid IP address. However, in the case of IPv6 addresses, it was
6255 not checking this. This is a hostage to fortune. Exim now panics and dies
6256 if the condition is not met. A case was found where this could be provoked
6257 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6258 components; fortuitously, this particular loophole had already been fixed
6259 by change 4.50/55 above.
6261 If there are any other similar loopholes, the new check in host_aton()
6262 itself should stop them being exploited. The report I received stated that
6263 data on the command line could provoke the exploit when Exim was running as
6264 exim, but did not say which command line option was involved. All I could
6265 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6266 running as the user.
6269 61. There was a buffer overflow vulnerability in the SPA authentication code
6270 (which came originally from the Samba project). I have added a test to the
6271 spa_base64_to_bits() function which I hope fixes it.
6274 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6275 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6277 63. The daemon start-up calls getloadavg() while still root for those OS that
6278 need the first call to be done as root, but it missed one case: when
6279 deliver_queue_load_max is set with deliver_drop_privilege. This is
6280 necessary for the benefit of the queue runner, because there is no re-exec
6281 when deliver_drop_privilege is set.
6283 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6284 This has been fixed.
6286 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6287 was in use, was not putting the data itself into the right store pool;
6288 consequently, it could be overwritten for a subsequent message in the same
6289 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6292 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6294 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6295 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6296 the function were treating the return as a boolean value, which happened to
6297 work because 0=false and not-0=true, but is not correct code.
6299 68. The host_aton() function was not handling scoped IPv6 addresses (those
6300 with, for example, "%eth0" on the end) correctly.
6302 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6303 negated items (that is, ~something) in unsigned ints. Some compilers
6304 apparently mutter when there is no cast.
6306 70. If an address verification called from an ACL failed, and did not produce a
6307 user-specific message (i.e. there was only a "system" message), nothing was
6308 put in $acl_verify_message. In this situation, it now puts the system
6311 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6312 session; change 4.31/43 added the unwanted input to the log line - except
6313 that it did not do this in the start of session case. It now does.
6315 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6316 This is wrong and can cause the other end to generate a synchronization
6317 error if it is another Exim or anything else that does the synchronization
6318 check. A QUIT command is no longer sent after a timeout.
6320 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6321 during host lookups.
6323 74. The defer_ok option of callout verification was not working if it was used
6324 when verifying addresses in header lines, that is, for this case:
6326 verify = header_sender/callout=defer_ok
6328 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6329 those file descriptors could be used for SMTP connections. If anything
6330 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6331 could be sent to the SMTP client, causing chaos. The daemon now opens
6332 stdin, stdout, and stderr to /dev/null when it puts itself into the
6335 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6336 log by default. The user can override this with suitable Perl magic.
6338 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6339 the log message when discard triggers, was not working for the DATA ACL or
6340 for the non-SMTP ACL.
6342 78. Error message wording change in sieve.c.
6344 79. If smtp_accept_max_per_host was set, the number of connections could be
6345 restricted to fewer than expected, because the daemon was trying to set up
6346 a new connection before checking whether the processes handling previous
6347 connections had finished. The check for completed processes is now done
6348 earlier. On busy systems, this bug wouldn't be noticed because something
6349 else would have woken the daemon, and it would have reaped the completed
6352 80. If a message was submitted locally by a user whose login name contained one
6353 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6354 It caused a spool format error. I have fixed the spool reading code. A
6355 related problem was that the "from" clause in the Received: line became
6356 illegal because of the space(s). It is now covered by ${quote_local_part.
6358 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6361 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6363 83. Patch from Sieve maintainer to fix unterminated string problem in
6364 "vacation" handling.
6366 84. Some minor changes to the Linux configuration files to help with other
6367 OS variants using glibc.
6369 85. One more patch for Sieve to update vacation handling to latest spec.
6372 ----------------------------------------------------
6373 See the note above about the 4.44 and 4.50 releases.
6374 ----------------------------------------------------
6380 1. Change 4.43/35 introduced a bug that caused file counts to be
6381 incorrectly computed when quota_filecount was set in an appendfile
6384 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6385 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6388 3. Give more explanation in the error message when the command for a transport
6389 filter fails to execute.
6391 4. There are several places where Exim runs a non-Exim command in a
6392 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6393 was being done only for the command run by the queryprogram router. It is
6394 now done for all such subprocesses. The other cases are: ${run, transport
6395 filters, and the commands run by the lmtp and pipe transports.
6397 5. Some older OS have a limit of 256 on the maximum number of file
6398 descriptors. Exim was using setrlimit() to set 1000 as a large value
6399 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6400 systems. I've change it so that if it can't get 1000, it tries for 256.
6402 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6403 was an oversight, and furthermore, ever since the addition of extra
6404 controls (e.g. 4.43/32), the checks on when to allow different forms of
6405 "control" were broken. There should now be diagnostics for all cases when a
6406 control that does not make sense is encountered.
6408 7. $recipients is now available in the predata ACL (oversight).
6410 8. Tidy the search cache before the fork to do a delivery from a message
6411 received from the command line. Otherwise the child will trigger a lookup
6412 failure and thereby defer the delivery if it tries to use (for example) a
6413 cached ldap connection that the parent has called unbind on.
6415 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6416 of $address_data from the recipient verification was clobbered by the
6417 sender verification.
6419 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6420 was its contents. (It was OK if the option was not defined at all.)
6422 11. A "Completed" log line is now written for messages that are removed from
6423 the spool by the -Mrm option.
6425 12. $host_address is now set to the target address during the checking of
6426 ignore_target_hosts.
6428 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6429 being passed; this would have caused $sender_host_name to have been used if
6430 matching the list had actually called for a host name (not very likely,
6431 since this list is usually IP addresses). A host name is now passed as
6434 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6435 code that specifies a non-restarting handler (typically sigaction() in
6436 modern systems) in an attempt to fix a rare and obscure crash bug.
6438 15. Narrowed the window for a race in the daemon that could cause it to ignore
6439 SIGCHLD signals. This is not a major problem, because they are used only to
6440 wake it up if nothing else does.
6442 16. A malformed maildirsize file could cause Exim to calculate negative values
6443 for the mailbox size or file count. Odd effects could occur as a result.
6444 The maildirsize information is now recalculated if the size or filecount
6447 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6448 support for a long time. Removed HAVE_SYS_VFS_H.
6450 18. Updated exipick to current release from John Jetmore.
6452 19. Allow an empty sender to be matched against a lookup in an address list.
6453 Previously the only cases considered were a regular expression, or an
6456 20. Exim went into a mad DNS lookup loop when doing a callout where the
6457 host was specified on the transport, if the DNS lookup yielded more than
6460 21. The RFC2047 encoding function was originally intended for short strings
6461 such as real names; it was not keeping to the 75-character limit for
6462 encoded words that the RFC imposes. It now respects the limit, and
6463 generates multiple encoded words if necessary. To be on the safe side, I
6464 have increased the buffer size for the ${rfc2047: expansion operator from
6467 22. Failure to deliver a bounce message always caused it to be frozen, even if
6468 there was an errors_to setting on the router. The errors_to setting is now
6471 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6472 canonical form (fully expanded) before being placed in
6473 $sender_host_address.
6475 24. Updated eximstats to version 1.33
6477 25. Include certificate and key file names in error message when GnuTLS fails
6478 to set them up, because the GnuTLS error message doesn't include the name
6479 of the failing file when there is a problem reading it.
6481 26. Expand error message when OpenSSL has problems setting up cert/key files.
6484 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6485 (this can affect the format of dates).
6487 28. exim_tidydb, when checking for the continued existence of a message for
6488 which it has found a message-specific retry record, was not finding
6489 messages that were in split spool directories. Consequently, it was
6490 deleting retry records that should have stayed in existence.
6492 29. eximstats updated to version 1.35
6493 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6494 1.35 - bugfix such that pie charts by volume are generated correctly
6496 30. The SPA authentication driver was not abandoning authentication and moving
6497 on to the next authenticator when an expansion was forced to fail,
6498 contradicting the general specification for all authenticators. Instead it
6499 was generating a temporary error. It now behaves as specified.
6501 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6502 (the order specifies the preference for clients). The order is now AES256,
6503 AES128, 3DES, ARCFOUR128.
6505 31. Small patch to Sieve code - explicitly set From: when generating an
6508 32. Exim crashed if a remote delivery caused a very long error message to be
6509 recorded - for instance if somebody sent an entire SpamAssassin report back
6510 as a large number of 550 error lines. This bug was coincidentally fixed by
6511 increasing the size of one of Exim's internal buffers (big_buffer) that
6512 happened as part of the Exiscan merge. However, to be on the safe side, I
6513 have made the code more robust (and fixed the comments that describe what
6516 33. Some experimental protocols are using DNS PTR records for new purposes. The
6517 keys for these records are domain names, not reversed IP addresses. The
6518 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6519 leaves it alone. Component reversal etc. now happens only for IP addresses.
6522 34. The host_aton() function is supposed to be passed a string that is known
6523 to be a valid IP address. However, in the case of IPv6 addresses, it was
6524 not checking this. This is a hostage to fortune. Exim now panics and dies
6525 if the condition is not met. A case was found where this could be provoked
6526 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6527 components; fortuitously, this particular loophole had already been fixed
6528 by change 4.50/55 or 4.44/33 above.
6530 If there are any other similar loopholes, the new check in host_aton()
6531 itself should stop them being exploited. The report I received stated that
6532 data on the command line could provoke the exploit when Exim was running as
6533 exim, but did not say which command line option was involved. All I could
6534 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6535 running as the user.
6538 35. There was a buffer overflow vulnerability in the SPA authentication code
6539 (which came originally from the Samba project). I have added a test to the
6540 spa_base64_to_bits() function which I hope fixes it.
6543 36. The daemon start-up calls getloadavg() while still root for those OS that
6544 need the first call to be done as root, but it missed one case: when
6545 deliver_queue_load_max is set with deliver_drop_privilege. This is
6546 necessary for the benefit of the queue runner, because there is no re-exec
6547 when deliver_drop_privilege is set.
6549 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6550 was in use, was not putting the data itself into the right store pool;
6551 consequently, it could be overwritten for a subsequent message in the same
6552 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6555 38. Sometimes the final signoff response after QUIT could fail to get
6556 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6557 < 0 before doing a fflush(). This bug looks as though it goes back to the
6558 introduction of TLS in release 3.20, but "sometimes" must have been rare
6559 because the tests only now provoked it.
6565 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6566 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6567 Now it returns an integer. A number of calls were still expecting a T/F
6568 return. Fortuitously, in all cases, the tests worked in OK situations,
6569 which is the norm. However, things would have gone wrong on any write
6570 failures on the smtp file descriptor. This function is used when sending
6571 messages over SMTP and also when doing verify callouts.
6573 2. When Exim is called to do synchronous delivery of a locally submitted
6574 message (the -odf or -odi options), it no longer closes stderr before doing
6577 3. Implemented the mua_wrapper option.
6579 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6581 5. Implemented the functions header_remove(), header_testname(),
6582 header_add_at_position(), and receive_remove_recipient(), and exported them
6585 6. If an ACL "warn" statement specified the addition of headers, Exim already
6586 inserted X-ACL-Warn: at the start if there was no header name. However, it
6587 was not making this test for the second and subsequent header lines if
6588 there were newlines in the string. This meant that an invalid header could
6589 be inserted if Exim was badly configured.
6591 7. Allow an ACL "warn" statement to add header lines at the start or after all
6592 the Received: headers, as well as at the end.
6594 8. Added the rcpt_4xx retry error code.
6596 9. Added postmaster_mailfrom=xxx to callout verification option.
6598 10. Added mailfrom=xxxx to the callout verification option, for verify=
6601 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6602 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6604 12. Inserted some casts to stop certain compilers warning when using pointer
6605 differences as field lengths or precisions in printf-type calls (mostly
6606 affecting debugging statements).
6608 13. Added optional readline() support for -be (dynamically loaded).
6610 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6611 same clock tick as a message's arrival, so that its received time was the
6612 same as the "first fail" time on the retry record, and that message
6613 remained on the queue past the ultimate address timeout, every queue runner
6614 would try a delivery (because it was past the ultimate address timeout) but
6615 after another failure, the ultimate address timeout, which should have then
6616 bounced the address, did not kick in. This was a "< instead of <=" error;
6617 in most cases the first failure would have been in the next clock tick
6618 after the received time, and all would be well.
6620 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6621 being recognized when the domain list was tested by the match_domain
6622 condition in an expansion string.
6624 16. Added the ${str2b64: operator.
6626 17. Exim was always calling setrlimit() to set a large limit for the number of
6627 processes, without checking whether the existing limit was already
6628 adequate. (It did check for the limit on file descriptors.) Furthermore,
6629 errors from getrlimit() and setrlimit() were being ignored. Now they are
6630 logged to the main and panic logs, but Exim does carry on, to try to do its
6631 job under whatever limits there are.
6633 18. Imported PCRE 5.0.
6635 19. Trivial typo in log message " temporarily refused connection" (the leading
6638 20. If the log selector return_path_on_delivery was set and an address was
6639 redirected to /dev/null, the delivery process crashed because it assumed
6640 that a return path would always be set for a "successful" delivery. In this
6641 case, the whole delivery is bypassed as an optimization, and therefore no
6644 21. Internal re-arrangement: the function for sending a challenge and reading
6645 a response while authentication was assuming a zero-terminated challenge
6646 string. It's now changed to take a pointer and a length, to allow for
6647 binary data in such strings.
6649 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6651 23. Exim was not respecting finduser_retries when seeking the login of the
6652 uid under which it was called; it was always trying 10 times. (The default
6653 setting of finduser_retries is zero.) Also, it was sleeping after the final
6654 failure, which is pointless.
6656 24. Implemented tls_on_connect_ports.
6658 25. Implemented acl_smtp_predata.
6660 26. If the domain in control=submission is set empty, Exim assumes that the
6661 authenticated id is a complete email address when it generates From: or
6662 Sender: header lines.
6664 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6665 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6666 chown and chgrp in /bin and hostname in /usr/bin.
6668 28. Exim was keeping the "process log" file open after each use, just as it
6669 does for the main log. This opens the possibility of it remaining open for
6670 long periods when the USR1 signal hits a daemon. Occasional processlog
6671 errors were reported, that could have been caused by this. Anyway, it seems
6672 much more sensible not to leave this file open at all, so that is what now
6675 29. The long-running daemon process does not normally write to the log once it
6676 has entered its main loop, and it closes the log before doing so. This is
6677 so that log files can straightforwardly be renamed and moved. However,
6678 there are a couple of unusual error situations where the daemon does write
6679 log entries, and I had neglected to close the log afterwards.
6681 30. The text of an SMTP error response that was received during a remote
6682 delivery was being truncated at 512 bytes. This is too short for some of
6683 the long messages that one sometimes sees. I've increased the limit to
6686 31. It is now possible to make retry rules that apply only when a message has a
6687 specific sender, in particular, an empty sender.
6689 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6690 it possible to be selective about when SMTP synchronization is enforced.
6692 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6694 32. Implemented hosts_connection_nolog.
6696 33. Added an ACL for QUIT.
6698 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6701 35. Added mailbox_size and mailbox_filecount to appendfile.
6703 36. Added control = no_multiline_responses to ACLs.
6705 37. There was a bug in the logic of the code that waits for the clock to tick
6706 in the case where the clock went backwards by a substantial amount such
6707 that the microsecond fraction of "now" was more than the microsecond
6708 fraction of "then" (but the whole seconds number was less).
6710 38. Added support for the libradius Radius client library this is found on
6711 FreeBSD (previously only the radiusclient library was supported).
6717 1. When certain lookups returned multiple values in the form name=value, the
6718 quoting of the values was not always being done properly. Specifically:
6719 (a) If the value started with a double quote, but contained no whitespace,
6721 (b) If the value contained whitespace other than a space character (i.e.
6722 tabs or newlines or carriage returns) it was not quoted.
6723 This fix has been applied to the mysql and pgsql lookups by writing a
6724 separate quoting function and calling it from the lookup code. The fix
6725 should probably also be applied to nisplus, ibase and oracle lookups, but
6726 since I cannot test any of those, I have not disturbed their existing code.
6728 2. A hit in the callout cache for a specific address caused a log line with no
6729 reason for rejecting RCPT. Now it says "Previous (cached) callout
6730 verification failure".
6732 3. There was an off-by-one bug in the queryprogram router. An over-long
6733 return line was truncated at 256 instead of 255 characters, thereby
6734 overflowing its buffer with the terminating zero. As well as fixing this, I
6735 have increased the buffer size to 1024 (and made a note to document this).
6737 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6738 when Exim is waiting for an SMTP response from a remote server, Exim
6739 restarts its select() call on the socket, thereby resetting its timeout.
6740 This is not a problem when such interrupts are rare. Somebody set up a cron
6741 job to run exiwhat every 2 minutes, which is less than the normal select()
6742 timeout (5 or 10 minutes). This meant that the select() timeout never
6743 kicked in because it was always reset. I have fixed this by comparing the
6744 time when an interrupt arrives with the time at the start of the first call
6745 to select(). If more time than the timeout has elapsed, the interrupt is
6746 treated as a timeout.
6748 5. Some internal re-factoring in preparation for the addition of Sieve
6749 extensions (by MH). In particular, the "personal" test is moved to a
6750 separate function, and given an option for scanning Cc: and Bcc: (which is
6751 not set for Exim filters).
6753 6. When Exim created an email address using the login of the caller as the
6754 local part (e.g. when creating a From: or Sender: header line), it was not
6755 quoting the local part when it contained special characters such as @.
6757 7. Installed new OpenBSD configuration files.
6759 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6760 try to make them clearer.
6762 9. Callout options, other than the timeout value, were being ignored when
6763 verifying sender addresses in header lines. For example, when using
6765 verify = header_sender/callout=no_cache
6767 the cache was (incorrectly) being used.
6769 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6770 only the Cygwin environment.
6772 11. When return_path_on_delivery was set as a log selector, if different remote
6773 addresses in the same message used different return paths and parallel
6774 remote delivery occurred, the wrong values would sometimes be logged.
6775 (Whenever a remote delivery process finished, the return path value from
6776 the most recently started remote delivery process was logged.)
6778 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6779 lines when AUTH and/or TLS are in use. This is the "received protocol"
6780 field. Exim used to use "asmtp" for authenticated SMTP, without any
6781 indication (in the protocol name) for TLS use. Now it follows the RFC and
6782 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6783 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6784 names appear in log lines as well as in Received: header lines.
6786 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6787 extensions, and comparison tests, and to fix some bugs.
6789 14. Changes to the "personal" filter test:
6791 (1) The test was buggy in that it was just doing the equivalent of
6792 "contains" tests on header lines. For example, if a user's address was
6793 anne@some.where, the "personal" test would incorrectly be true for
6795 To: susanne@some.where
6797 This test is now done by extracting each address from the header in turn,
6798 and checking the entire address. Other tests that are part of "personal"
6799 are now done using regular expressions (for example, to check local parts
6800 of addresses in From: header lines).
6802 (2) The list of non-personal local parts in From: addresses has been
6803 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6804 taken from the Sieve specification recommendations.
6806 (3) If the message contains any header line starting with "List-" it is
6807 treated as non-personal.
6809 (4) The test for "circular" in the Subject: header line has been removed
6810 because it now seems ill-conceived.
6812 15. Minor typos in src/EDITME comments corrected.
6814 16. Installed latest exipick from John Jetmore.
6816 17. If headers_add on a router specified a text string that was too long for
6817 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6818 of string_sprintf() is now avoided.
6820 18. $message_body_size was not set (it was always zero) when running the DATA
6821 ACL and the local_scan() function.
6823 19. For the "mail" command in an Exim filter, no default was being set for
6824 the once_repeat time, causing a random time value to be used if "once" was
6825 specified. (If the value happened to be <= 0, no repeat happened.) The
6826 default is now 0s, meaning "never repeat". The "vacation" command was OK
6827 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6828 (I found it when inspecting the code).
6830 20. There is now an overall timeout for performing a callout verification. It
6831 defaults to 4 times the callout timeout, which applies to individual SMTP
6832 commands during the callout. The overall timeout applies when there is more
6833 than one host that can be tried. The timeout is checked before trying the
6834 next host. This prevents very long delays if there are a large number of
6835 hosts and all are timing out (e.g. when the network connections are timing
6836 out). The value of the overall timeout can be changed by specifying an
6837 additional sub-option for "callout", called "maxwait". For example:
6839 verify = sender/callout=5s,maxwait=20s
6841 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6842 to the end before writing, but this should make it even safer).
6844 22. Exim was forgetting that it had advertised PIPELINING for the second and
6845 subsequent messages on an SMTP connection. It was also not resetting its
6846 memory on STARTTLS and an internal HELO.
6848 23. When Exim logs an SMTP synchronization error within a session, it now
6849 records whether PIPELINING has been advertised or not.
6851 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6852 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6853 rather than long int.
6855 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6857 26. Added the never_mail option to autoreply.
6863 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6864 crash if the getsockname() call failed; this can happen if a connection is
6865 closed very soon after it is established. The problem was simply in the
6866 order in which certain operations were done, causing Exim to try to write
6867 to the SMTP stream before it had set up the file descriptor. The bug has
6868 been fixed by making things happen in the correct order.
6874 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6875 before the connection was closed, thus losing the rejection response.
6877 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6878 some early Solaris releases, but causes trouble in current releases where
6879 socklen_t is defined.
6881 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6884 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6887 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6888 that releasing the top of it at the end releases what was used for sub-
6889 expansions (unless the block got too big). However, discard this block if
6890 the first thing is a variable or header, so that we can use its block when
6891 it is dynamic (useful for very large $message_headers, for example).
6893 6. Lookups now cache *every* query, not just the most recent. A new, separate
6894 store pool is used for this. It can be recovered when all lookup caches are
6895 flushed. Lookups now release memory at the end of their result strings.
6896 This has involved some general refactoring of the lookup sources.
6898 7. Some code has been added to the store_xxx() functions to reduce the amount
6899 of flapping under certain conditions.
6901 8. log_incoming_interface used to affect only the <= reception log lines. Now
6902 it causes the local interface and port to be added to several more SMTP log
6903 lines, for example "SMTP connection from", and rejection lines.
6905 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6907 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6909 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6910 could be overwritten at the end of the current message (or the start of a
6911 new message if it was set in a HELO ACL). The value is now preserved for
6912 the duration of the SMTP connection.
6914 12. If a transport had a headers_rewrite setting, and a matching header line
6915 contained an unqualified address, that address was qualified, even if it
6916 did not match any rewriting rules. The underlying bug was that the values
6917 of the flags that permit the existence of unqualified sender and recipient
6918 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6919 non-local messages, and by -bnq for local messages) were not being
6920 preserved with the message after it was received.
6922 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6923 "next input=" as part of the text comprising the host identity instead of
6924 the correct text. The code was using the same buffer for two different
6925 strings. However, depending on which order the printing function evaluated
6926 its arguments, the bug did not always show up. Under Linux, for example, my
6927 test suite worked just fine.
6929 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6930 doesn't work with some older versions of Perl. It has been changed to "my",
6931 which in any case is probably the better facility to use.
6933 15. A really picky compiler found some instances of statements for creating
6934 error messages that either had too many or two few arguments for the format
6937 16. The size of the buffer for calls to the DNS resolver has been increased
6938 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6939 for addresses that have a lot of PTR records. This alleviates a problem; it
6940 does not fully solve it.
6942 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6943 buffer now truncates the list and logs the incident, which is the same
6944 action as happens when Exim is looking up a host name and its aliases.
6945 Previously in this situation something unpredictable would happen;
6946 sometimes it was "internal error: store_reset failed".
6948 18. If a server dropped the connection unexpectedly when an Exim client was
6949 using GnuTLS and trying to read a response, the client delivery process
6950 crashed while trying to generate an error log message.
6952 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6953 string, for example:
6955 warn message = H1: something\nH2: something
6957 the text was added as a single header line from Exim's point of view
6958 though it ended up OK in the delivered message. However, searching for the
6959 second and subsequent header lines using $h_h2: did not work. This has been
6960 fixed. Similarly, if a system filter added multiple headers in this way,
6961 the routers could not see them.
6963 20. Expanded the error message when iplsearch is called with an invalid key to
6964 suggest using net-iplsearch in a host list.
6966 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6967 ACLs are no longer actually imposed (and a message to that effect is
6970 22. If a "gecos" field in a passwd entry contained escaped characters, in
6971 particular, if it contained a \" sequence, Exim got it wrong when building
6972 a From: or a Sender: header from that name. A second bug also caused
6973 incorrect handling when an unquoted " was present following a character
6974 that needed quoting.
6976 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6977 was not being matched caselessly.
6979 24. Arranged for all hyphens in the exim.8 source to be escaped with
6982 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6983 properly. Recipient callout cache records were still being keyed to include
6984 the sender, even when use_sender was set false. This led to far more
6985 callouts that were necessary. The sender is no longer included in the key
6986 when use_sender is false.
6988 26. Added "control = submission" modifier to ACLs.
6990 27. Added the ${base62d: operator to decode base 62 numbers.
6992 28. dnsdb lookups can now access SRV records.
6994 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6995 the configuration file.
6997 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6998 (-v) mode. This makes the output for a verbose queue run more intelligible.
7000 31. Added a use_postmaster feature to recipient callouts.
7002 32. Added the $body_zerocount variable, containing the number of binary zero
7003 bytes in the message body.
7005 33. The time of last modification of the "new" subdirectory is now used as the
7006 "mailbox time last read" when there is a quota error for a maildir
7009 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7011 35. Added +ignore_unknown as a special item in host lists.
7013 36. Code for decoding IPv6 addresses in host lists is now included, even if
7014 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7015 address was recognized as an IP address, but was then not correctly decoded
7016 into binary, causing unexpected and incorrect effects when compared with
7023 1. Very minor rewording of debugging text in manualroute to say "list of
7024 hosts" instead of "hostlist".
7026 2. If verify=header_syntax was set, and a header line with an unqualified
7027 address (no domain) and a large number of spaces between the end of the
7028 name and the colon was received, the reception process suffered a buffer
7029 overflow, and (when I tested it) crashed. This was caused by some obsolete
7030 code that should have been removed. The fix is to remove it!
7032 3. When running in the test harness, delay a bit after writing a bounce
7033 message to get a bit more predictability in the log output.
7035 4. Added a call to search_tidyup() just before forking a reception process. In
7036 theory, someone could use a lookup in the expansion of smtp_accept_max_
7037 per_host which, without the tidyup, could leave open a database connection.
7039 5. Added the variables $recipient_data and $sender_data which get set from a
7040 lookup success in an ACL "recipients" or "senders" condition, or a router
7041 "senders" option, similar to $domain_data and $local_part_data.
7043 6. Moved the writing of debug_print from before to after the "senders" test
7046 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7047 problems for message scanning, either using a data ACL, or using
7048 local_scan() because the Received: header was not generated till after they
7049 were called (in order to set the time as the time of reception completion).
7050 I have revised the way this works. The header is now generated after the
7051 body is received, but before the ACL or local_scan() are called. After they
7052 are run, the timestamp in the header is updated.
7058 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7059 before starting a queue runner without re-exec. This happened only when
7060 deliver_drop_privilege was set or when the Exim user was set to root. The
7061 effect of the bug was that timeouts during subsequent deliveries caused
7062 crashes instead of being properly handled. The handler is now left at its
7063 default (and expected) setting.
7065 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7066 message, again when deliver_drop_privilege is set or Exim is run as root.
7067 The bug described in (1) was not present in this case, but the tidying up
7068 of the other signals was missing. I have made the two cases consistent.
7070 3. The ignore_target_hosts setting on a manualroute router was being ignored
7071 for hosts that were looked up using the /MX notation.
7073 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7076 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7077 operated on the sender address. After changing the $sender_address to <>
7078 for the sender address verify, Exim was re-instated it as the original
7079 (before rewriting) address, but remembering that it had rewritten it, so it
7080 wasn't rewriting it again. This bug also had the effect of breaking the
7081 sender address verification caching when the sender address was rewritten.
7083 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7084 This has been changed so that if the ip literal address matches
7085 ignore_target_hosts, the router declines.
7087 7. Added expansion conditions match_domain, match_address, and match_local_
7088 part (NOT match_host).
7090 8. The placeholder for the Received: header didn't have a length field set.
7092 9. Added code to Exim itself and to exim_lock to test for a specific race
7093 condition that could lead to file corruption when using MBX delivery. The
7094 issue is with the lockfile that is created in /tmp. If this file is removed
7095 after a process has opened it but before that process has acquired a lock,
7096 there is the potential for a second process to recreate the file and also
7097 acquire a lock. This could lead to two Exim processes writing to the file
7098 at the same time. The added code performs the same test as UW imapd; it
7099 checks after acquiring the lock that its file descriptor still refers to
7100 the same named file.
7102 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7103 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7106 11. Added the smtp_active_hostname option. If used, this will typically be made
7107 to depend on the incoming interface address. Because $interface_address is
7108 not set up until the daemon has forked a reception process, error responses
7109 that can happen earlier (such as "too many connections") no longer contain
7112 12. If an expansion in a condition on a "warn" statement fails because a lookup
7113 defers, the "warn" statement is abandoned, and the next ACL statement is
7114 processed. Previously this caused the whole ACL to be aborted.
7116 13. Added the iplsearch lookup type.
7118 14. Added ident_timeout as a log selector.
7120 15. Added tls_certificate_verified as a log selector.
7122 16. Added a global option tls_require_ciphers (compare the smtp transport
7123 option of the same name). This controls incoming TLS connections.
7125 17. I finally figured out how to make tls_require_ciphers do a similar thing
7126 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7127 before starting the TLS session.
7129 18. Tabs are now shown as \t in -bP output.
7131 19. If the log selector return_path_on_delivery was set, Exim crashed when
7132 bouncing a message because it had too many Received: header lines.
7134 20. If two routers both had headers_remove settings, and the first one included
7135 a superfluous trailing colon, the final name in the first list and the
7136 first name in the second list were incorrectly joined into one item (with a
7137 colon in the middle).
7143 1. Added -C and -D options to the exinext utility, mainly to make it easier
7144 to include in the automated testing, but these could be helpful when
7145 multiple configurations are in use.
7147 2. The exinext utility was not formatting the output nicely when there was
7148 an alternate port involved in the retry record key, nor when there was a
7149 message id as well (for retries that were specific to a specific message
7150 and a specific host). It was also confused by IPv6 addresses, because of
7151 the additional colons they contain. I have fixed the IPv4 problem, and
7152 patched it up to do a reasonable job for IPv6.
7154 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7155 delivery, the log line now contains "pipelined" if PIPELINING was used.
7157 4. An SMTP transport process used to panic and die if the bind() call to set
7158 an explicit outgoing interface failed. This has been changed; it is now
7159 treated in the same way as a connect() failure.
7161 5. A reference to $sender_host_name in the part of a conditional expansion
7162 that was being skipped was still causing a DNS lookup. This no longer
7165 6. The def: expansion condition was not recognizing references to header lines
7166 that used bh_ and bheader_.
7168 7. Added the _cache feature to named lists.
7170 8. The code for checking quota_filecount in the appendfile transport was
7171 allowing one more file than it should have been.
7173 9. For compatibility with Sendmail, the command line option
7181 and sets the incoming protocol and host name (for trusted callers). The
7182 host name and its colon can be omitted when only the protocol is to be set.
7183 Note the Exim already has two private options, -pd and -ps, that refer to
7184 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7185 "s", but I don't think that's a major issue.
7187 10. A number of refactoring changes to the code, none of which should affect
7190 (a) The number of logging options was getting close to filling up the
7191 32-bit word that was used as a bit map. I have split them into two classes:
7192 those that are passed in the argument to log_write(), and those that are
7193 only ever tested independently outside of that function. These are now in
7194 separate 32-bit words, so there is plenty of room for expansion again.
7195 There is no change in the user interface or the logging behaviour.
7197 (b) When building, for example, log lines, the code previously used a
7198 macro that called string_cat() twice, in order to add two strings. This is
7199 not really sufficiently general. Furthermore, there was one instance where
7200 it was actually wrong because one of the argument was used twice, and in
7201 one call a function was used. (As it happened, calling the function twice
7202 did not affect the overall behaviour.) The macro has been replaced by a
7203 function that can join an arbitrary number of extra strings onto a growing
7206 (c) The code for expansion conditions now uses a table and a binary chop
7207 instead of a serial search (which was left over from when there were very
7208 few conditions). Also, it now recognizes conditions like "pam" even when
7209 the relevant support is not compiled in: a suitably worded error message is
7210 given if an attempt is made to use such a condition.
7212 11. Added ${time_interval:xxxxx}.
7214 12. A bug was causing one of the ddress fields not to be passed back correctly
7215 from remote delivery subprocesses. The field in question was not being
7216 subsequently used, so this caused to problems in practice.
7218 13. Added new log selectors queue_time and deliver_time.
7220 14. Might have fixed a bug in maildirsizefile handling that threw up
7221 "unexpected character" debug warnings, and recalculated the data
7222 unnecessarily. In any case, I expanded the warning message to give more
7225 15. Added the message "Restricted characters in address" to the statements in
7226 the default ACL that block characters like @ and % in local parts.
7228 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7229 Three changes have been made:
7231 (a) There was a serious bug; a negative response to MAIL caused the whole
7232 recipient domain to be cached as invalid, thereby blocking all messages
7233 to all local parts at the same domain, from all senders. This bug has
7234 been fixed. The domain is no longer cached after a negative response to
7235 MAIL if the sender used is not empty.
7237 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7240 (c) A new callout option, "use_sender" has been added for people who want
7241 the modified behaviour.
7247 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7250 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7251 indeed breaks things for older releases.
7253 3. Added additional logging to the case where there is a problem reading data
7254 from a filter that is running in a subprocess using a pipe, in order to
7255 try to track down a specific problem.
7257 4. Testing facility fudge: when running in the test harness and attempting
7258 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7259 getting "No route to host". Convert this to a timeout.
7261 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7264 6. Some OS don't have socklen_t but use size_t instead. This affects the
7265 fifth argument of getsockopt() amongst other things. This is now
7266 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7267 can be set for individual OS. I have set it for SunOS5, OSF1, and
7268 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7269 some earlier ones do not.
7271 7. Change 4.30/15 was not doing the test caselessly.
7273 8. The standard form for an IPv6 address literal was being rejected by address
7274 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7275 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7276 this, as well as the form without the "IPv6" on the front (but only when
7277 address literals are enabled, of course).
7279 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7281 10. Exim crashed if a message with an empty sender address specified by -f
7282 encountered a router with an errors_to setting. This could be provoked only
7283 by a command such as
7287 where an empty string was supplied; "<>" did not hit this bug.
7289 11. Installed PCRE release 4.5.
7291 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7292 remained set. It is now erased.
7294 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7295 times from message ids (which are base 36 rather than the normal 62).
7297 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7298 were being counted as actual protocol errors, and logged if the log
7299 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7300 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7301 and DATA following a set of rejected RCPTs do not count as protocol errors.
7302 In other words, Exim assumes they were pipelined, though this may not
7303 actually be the case. Of course, in all cases the client gets an
7304 appropriate error code.
7306 15. If a lookup fails in an ACL condition, a message about the failure may
7307 be available; it is used if testing the ACL cannot continue, because most
7308 such messages specify what the cause of the deferral is. However, some
7309 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7310 that caused an old message to be retained and used if a later statement
7311 caused a defer, replacing the real cause of the deferral.
7313 16. If an IP address had so many PTR records that the DNS lookup buffer
7314 was not large enough to hold them, Exim could crash while trying to process
7315 the truncated data. It now detects and logs this case.
7317 17. Further to 4.21/58, another change has been made: if (and only if) the
7318 first line of a message (the first header line) ends with CRLF, a bare LF
7319 in a subsequent header line has a space inserted after it, so as not to
7320 terminate the header.
7322 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7323 unnecessarily, used atoi() instead of strtol(), and didn't check the
7324 termination when getting file sizes from file names by regex.
7326 19. Completely re-implemented the support for maildirsize files, in the light
7327 of a number of problems with the previous contributed implementation
7328 (4.30/29). In particular:
7330 . If the quota is zero, the maildirsize file is maintained, but no quota is
7333 . If the maildir directory does not exist, it is created before any attempt
7334 to write a maildirsize file.
7336 . The quota value in the file is just a cache; if the quota is changed in
7337 the transport, the new value overrides.
7339 . A regular expression is available for excluding directories from the
7342 20. The autoreply transport checks the characters in options that define the
7343 message's headers; it allows continued headers, but it was checking with
7344 isspace() after an embedded newline instead of explicitly looking for a
7347 21. If all the "regular" hosts to which an address was routed had passed their
7348 expiry times, and had not reached their retry times, the address was
7349 bounced, even if fallback hosts were defined. Now Exim should go on to try
7352 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7353 equivalent code in the SMTP transport. Some hosts send humungous responses
7354 to HELO/EHLO, more than 1024 it seems.
7356 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7357 gives compiler warnings in some environments. I've now done it "properly",
7360 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7361 (because of problems with the built-in one) was declared to return uschar *
7362 instead of char *, causing compiler failure.
7364 25. Fixed a file descriptor leak when processing alias/forward files.
7366 26. Fixed a minor format string issue in dbfn.c.
7368 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7370 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7371 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7374 29. When a sender address is verified, it is cached, to save repeating the test
7375 when there is more than one recipient in a message. However, when the
7376 verification involves a callout, it is possible for different callout
7377 options to be set for different recipients. It is too complicated to keep
7378 track of this in the cache, so now Exim always runs a verification when a
7379 callout is required, relying on the callout cache for the optimization.
7380 The overhead is duplication of the address routing, but this should not be
7383 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7384 to be verified with callout=postmaster, and the main callout worked but the
7385 postmaster check failed, the verification correctly failed. However, if a
7386 subsequent RCPT command asked for sender verification *without* the
7387 postmaster check, incorrect caching caused this verification also to fail,
7390 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7391 it was not caching the DNS options (qualify_single, search_parents) that
7392 were used when the lookup failed. A subsequent lookup with different
7393 options therefore always gave the same answer, though there were cases
7394 where it should not have. (Example: a "domains = !$mx_any" option on a
7395 dnslookup router: the "domains" option is always processed without any
7396 widening, but the router might have qualify_single set.) Now Exim uses the
7397 cached value only when the same options are set.
7399 32. Added John Jetmore's "exipick" utility to the distribution.
7401 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7402 than a timeout (e.g. a certificate is required, and is not provided), an
7403 Exim server now closes the connection immediately. Previously it waited for
7404 the client to close - but if the client is SSL, it seems that they each
7405 wait for each other, leading to a delay before one of them times out.
7407 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7408 maintained 0.8.x compatibility because I don't think many are using it, and
7409 it is clearly obsolete.
7411 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7414 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7415 client certificate was expired. A simple patch fixes this, though I don't
7416 understand the full logic of why the verify callback is called multiple
7419 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7420 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7421 which causes problems with some clients (such as the Certicom SSL Plus
7422 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7423 disables the coutermeasure allowing Eudora to connect."
7425 38. Exim was not checking that a write() to a log file succeeded. This could
7426 lead to Bad Things if a log got too big, in particular if it hit a file
7427 size limit. Exim now panics and dies if it cannot write to a log file, just
7428 as it does if it cannot open a log file.
7430 39. Modified OS/Makefile-Linux so that it now contains
7432 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7434 The two -D definitions ensure that Exim is compiled with large file
7435 support, which makes it possible to handle log files that are bigger than
7438 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7439 instance) a domain was checked against a named list that involved a lookup,
7440 causing $domain_data to be set, then another domain was checked against the
7441 same list, then the first domain was re-checked, the value of $domain_data
7442 after the final check could be wrong. In particular, if the second check
7443 failed, it could be set empty. This bug probably also applied to
7446 41. The strip_trailing_dot option was not being applied to the address given
7447 with the -f command-line option.
7449 42. The code for reading a message's header from the spool was incrementing
7450 $received_count, but never initializing it. This meant that the value was
7451 incorrect (doubled) while delivering a message in the same process in which
7452 it was received. In the most common configuration of Exim, this never
7453 happens - a fresh exec is done - but it can happen when
7454 deliver_drop_privilege is set.
7456 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7457 it now includes up to 150 characters of the unexpected data in the log
7460 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7461 and building data strings. The size of both of these buffers was 10 000
7462 bytes - far larger than anybody would *ever* want, thought I. Needless to
7463 say, somebody hit the limit. I have increased the maximum line length to
7464 20 000 and the maximum data length of concatenated lines to 100 000. I have
7465 also fixed two bugs, because there was no checking on these buffers. Tsk,
7466 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7467 buffer is too small.
7469 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7470 lsearch lookups. Now it does.
7472 46. When parsing a route_list item in a manualroute router, a fixed-length
7473 buffer was used for the list of hosts. I made this 1024 bytes long,
7474 thinking that nobody would ever have a list of hosts that long. Wrong.
7475 Somebody had a whole pile of complicated expansion conditions, and the
7476 string was silently truncated, leading to an expansion error. It turns out
7477 that it is easier to change to an unlimited length (owing to other changes
7478 that have happened since this code was originally written) than to build
7479 structure for giving a limitation error. The length of the item that
7480 expands into the list of hosts is now unlimited.
7482 47. The lsearch lookup could not handle data where the length of text line was
7483 more than 4095 characters. Such lines were truncated, leading to shortened
7484 data being returned. It should now handle lines of any length.
7486 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7487 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7490 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7491 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7492 no longer happens in comment lines. A list of replacements is now placed
7493 at the head of all of the source files, except those whose only change is
7494 to replace PERL_COMMAND in the very first #! line.
7496 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7497 messages on the queue, with a bottom-up merge sort, using code contributed
7498 by Michael Haardt. This should make operations like -bp somewhat faster on
7499 large queues. It won't affect queue runners, except when queue_run_in_order
7502 51. Installed eximstats 1.31 in the distribution.
7504 52. Added support for SRV lookups to the dnslookup router.
7506 53. If an ACL referred to $message_body or $message_body_end, the value was not
7507 reset for any messages that followed in the same SMTP session.
7509 54. The store-handling optimization for building very long strings was not
7510 differentiating between the different store pools. I don't think this
7511 actually made any difference in practice, but I've tidied it.
7513 55. While running the routers to verify a sender address, $sender_address
7514 was still set to the sender address. This is wrong, because when routing to
7515 send a bounce to the sender, it would be empty. Therefore, I have changed
7516 it so that, while verifying a sender address, $sender_address is set to <>.
7517 (There is no change to what happens when verifying a recipient address.)
7519 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7520 target A or AAAA records (if not already returned) without resetting the
7521 qualify_single or search_parents options of the DNS resolver. These are
7522 inappropriate in this case because the targets of MX and SRV records must
7523 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7524 target that, when qualified, matched something in the local domain. These
7525 two options are now turned off when doing these lookups.
7527 57. It seems that at least some releases of Reiserfs (which does not have the
7528 concept of a fixed number of inodes) returns zero and not -1 for the
7529 number of available inodes. This interacted badly with check_spool_inodes,
7530 which assumed that -1 was the "no such thing" setting. What I have done is
7531 to check that the total number of inodes is greater than zero before doing
7532 the test of how many are available.
7534 58. When a "warn" ACL statement has a log_message modifier, the message is
7535 remembered, and not repeated. This is to avoid a lot of repetition when a
7536 message has many recipients that cause the same warning to be written.
7537 However, Exim was preserving the list of already written lines for an
7538 entire SMTP session, which doesn't seem right. The memory is now reset if a
7539 new message is started.
7541 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7542 debugging output unless log_rewrite was also set.
7544 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7545 of (int)(handle) when we know that handle contains (void *)(-1).
7547 61. The Exim daemon panic-logs an error return when it closes the incoming
7548 connection. However "connection reset by peer" seems to be common, and
7549 isn't really an error worthy of noting specially, so that particular error
7552 62. When Exim is trying to find all the local interfaces, it used to panic and
7553 die if the ioctl to get the interface flags failed. However, it seems that
7554 on at least one OS (Solaris 9) it is possible to have an interface that is
7555 included in the list of interfaces, but for which you get a failure error
7556 for this call. This happens when the interface is not "plumbed" into a
7557 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7558 failure of the "get flags" call assumes that the interface is down.
7560 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7561 makes life easier for people who are doing arithmetic on fields extracted
7562 from dates, where you often get leading zeros that should not be
7563 interpreted as octal.
7565 64. Added qualify_domain to the redirect router, to override the global
7568 65. If a pathologically long header line contained very many addresses (the
7569 report of this problem mentioned 10 000) and each of them was rewritten,
7570 Exim could use up a very large amount of memory. (It kept on making new
7571 copies of the header line as it rewrote, and never released the old ones.)
7572 At the expense of a bit more processing, the header rewriting function has
7573 been changed so that it no longer eats memory in this way.
7575 66. The generation of the Received: header has been moved from the time that a
7576 message starts to be received, to the time that it finishes. The timestamp
7577 in the Received: header should now be very close to that of the <= log
7578 line. There are two side-effects of this change:
7580 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7581 logged header lines no longer include the local Received: line, because
7582 it has not yet been created. The same applies to a copy of the message
7583 that is returned to a non-SMTP sender when a message is rejected.
7585 (b) When a filter file is tested using -bf, no additional Received: header
7586 is added to the test message. After some thought, I decided that this
7589 This change does not affect the value of $received_for. It is still set
7590 after address rewriting, but before local_scan() is called.
7592 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7594 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7595 gave an unhelpful panic error message, and a defer error. I have managed to
7596 change this behaviour so that it now rejects any supplied certificate,
7597 which seems right, as the list of acceptable certificates is empty.
7599 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7600 gave an unhelpful defer error. I have not managed to make this reject any
7601 supplied certificates, but the error message it gives is "no certificate
7602 supplied", which is not helpful.
7604 70. exigrep's output now also includes lines that are not associated with any
7605 message, but which match the given pattern. Implemented by a patch from
7606 Martin Sluka, which also tidied up the Perl a bit.
7608 71. Recipient callout verification, like sender verification, was using <> in
7609 the MAIL FROM command. This isn't really the right thing, since the actual
7610 sender may affect whether the remote host accepts the recipient or not. I
7611 have changed it to use the actual sender in the callout; this means that
7612 the cache record is now keyed on a recipient/sender pair, not just the
7613 recipient address. There doesn't seem to be a real danger of callout loops,
7614 since a callout by the remote host to check the sender would use <>.
7615 [SEE ABOVE: changed after hitting problems.]
7617 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7618 temporary errors. However, in the case of such a code being given after
7619 the end of a data transmission (i.e. after ".") Exim was failing to write
7620 a retry record for the message. (Yes, there was some broken host that was
7621 actually sending 8xx at this point.)
7623 73. An unknown lookup type in a host list could cause Exim to panic-die when
7624 the list was checked. (An example that provoked this was putting <; in the
7625 middle of a list instead of at the start.) If this happened during a DATA
7626 ACL check, a -D file could be left lying around. This kind of configuration
7627 error no longer causes Exim to die; instead it causes a defer error. The
7628 incident is still logged to the main and panic logs.
7630 74. Buglet left over from Exim 3 conversion. The message "too many messages
7631 in one connection" was written to the rejectlog but not the mainlog, except
7632 when address rewriting (yes!) was being logged.
7634 75. Added write_rejectlog option.
7636 76. When a system filter was run not as root (that is, when system_filter_user
7637 was set), the values of the $n variables were not being returned to the
7638 main process; thus, they were not subsequently available in the $sn
7641 77. Added +return_path_on_delivery log selector.
7643 78. A connection timeout was being treated differently from recipients deferred
7644 when testing hosts_max_try with a message that was older than the host's
7645 retry timeout. (The host should not be counted, thus allowing all hosts to
7646 be tried at least once before bouncing.) This may have been the cause of an
7647 occasionally reported bug whereby a message would remain on the queue
7648 longer than the retry timeout, but would be bounced if a delivery was
7649 forced. I say "may" because I never totally pinned down the problem;
7650 setting up timeout/retry tests is difficult. See also the next item.
7652 79. The ultimate address timeout was not being applied to errors that involved
7653 a combination of host plus message (for example, a timeout on a MAIL
7654 command). When an address resolved to a number of possible hosts, and they
7655 were not all tried for each delivery (e.g. because of hosts_max_try), a
7656 message could remain on the queue longer than the retry timeout.
7658 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7661 81. Fixed an obscure SMTP outgoing bug which required at least the following
7662 conditions: (a) there was another message waiting for the same server;
7663 (b) the server returned 5xx to all RCPT commands in the first message so
7664 that the message was not completed; (c) the server dropped the connection
7665 or gave a negative response to the RSET that Exim sends to abort the
7666 transaction. The observed case was a dropped connection after DATA that had
7667 been sent in pipelining mode. That is, the server had advertised PIPELINING
7668 but was not implementing it correctly. The effect of the bug was incorrect
7669 behaviour, such as trying another host, and this could lead to a crash.
7675 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7676 and daemon.c were passed as pointers to ints; they should have been
7677 pointers to socklen_t variables (which are typically unsigned ints).
7679 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7682 3. Fixed a really odd bug that affected only the testing scheme; patching a
7683 certain fixed string in the binary changed the value of another string that
7684 happened to be identical to the end of the original first string.
7686 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7687 name", it returns that address as the IP address. On some operating
7688 systems (e.g. Solaris), it also passes back the IP address string as the
7689 "host name". However, on others (e.g. Linux), it passes back an empty
7690 string. Exim wasn't checking for this, and was changing the host name to an
7691 empty string, assuming it had been canonicalized.
7693 5. Although rare, it is permitted to have more than one PTR record for a given
7694 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7695 all the names associated with an address, because they do in Solaris.
7696 However, it seems that they do not in Linux for data that comes from the
7697 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7698 I found this out when I moved to a new Linux workstation and tried to run
7699 the Exim test suite.
7701 To get round this problem I have changed the code so that it now does its
7702 own call to the DNS to look up PTR records when searching for a host name.
7703 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7704 addresses that are only in /etc/hosts are still found.
7706 This behaviour is, however, controlled by an option called host_lookup_
7707 order, which defaults to "bydns:byaddr". If people want to use the other
7708 order, or indeed, just use one or the other means of lookup, they can
7709 specify it in this variable.
7711 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7712 some operating systems, this comes back from gethostbyaddr() as an empty
7713 string, and this is what Exim used to test for. However, it seems that in
7714 other systems, "." is yielded. Exim now tests for this case too.
7716 7. The values of check_spool_space and check_log_space are now held internally
7717 as a number of kilobytes instead of an absolute number of bytes. If a
7718 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7719 kilobyte. This means that much larger values can be stored.
7721 8. Exim monitor: an attempt to get the action menu when not actually pointing
7722 at a message produces an empty menu entitled "No message selected". This
7723 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7724 no entries in it ("Shell widget menu has zero width and/or height"). So I
7725 have added a single, blank menu entry in this case.
7727 9. Added ${quote_local_part.
7729 10. MIME decoding is now applied to the contents of Subject: header lines when
7732 11. Now that a reference to $sender_host_address automatically causes a reverse
7733 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7734 host lookup before query-style lookups in lists that might use this
7735 variable. This has therefore been abolished, and the "net-" prefix is no
7736 longer necessary for query-style lookups.
7738 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7739 have been a typo for LFLAGS, so it has been changed.
7741 13. The install script calls Exim with "-C /dev/null" in order to find the
7742 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7743 to be output. However, since Exim outputs its version number before the
7744 error, it didn't break the script. It just looked ugly. I fixed this by
7745 always allowing "-C /dev/null" if the caller is root.
7747 14. Ignore overlarge ACL variable number when reading spool file - insurance
7748 against a later release with more variables having written the file.
7750 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7751 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7752 this, as well as the form without the "IPv6" on the front.
7754 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7755 OS/Makefile-Darwin file.
7757 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7758 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7760 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7761 variable. However, some OS use ints for inodes. I've added cast to long int
7762 to get rid of the compiler warning.
7764 19. I had forgotten to lock out "/../" in configuration file names when
7765 ALT_CONFIG_PREFIX was set.
7767 20. Routers used for verification do not need to specify transports. However,
7768 if such a router generated a host list, and callout was configured, Exim
7769 crashed, because it could not find a port number from the (non-existent)
7770 transport. It now assumes port 25 in this circumstance.
7772 21. Added the -t option to exigrep.
7774 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7775 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7776 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7777 them is set, LOOKUP_LSEARCH is forced.
7779 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7781 24. Added sender and host information to the "rejected by local_scan()" log
7782 line; previously there was no indication of these.
7784 25. Added .include_if_exists.
7786 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7787 Linux. It turns out that not all file systems support this. Apparently some
7788 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7789 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7790 not supported on the file descriptor, is now ignored when Exim is trying to
7791 sync a directory. This applies only to Linux.
7793 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7795 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7796 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7799 29. Added support for maildirsize files from supplied patch (modified a bit).
7801 30. The use of :fail: followed by an empty string could lead Exim to respond to
7802 sender verification failures with (e.g.):
7804 550 Verification failed for <xxx>
7805 550 Sender verify failed
7807 where the first response line was missing the '-' that indicates it is not
7808 the final line of the response.
7810 31. The loop for finding the name of the user that called Exim had a hardwired
7811 limit of 10; it now uses the value of finduser_retries, which is used for
7812 all other user lookups.
7814 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7817 33. Exim was neglecting to zero errno before one call of strtol() when
7818 expanding a string and expecting an integer value. On some systems this
7819 resulted in spurious "integer overflow" errors. Also, it was casting the
7820 result into an int without checking.
7822 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7823 did not work. The code looks as if it has *never* worked, though it appears
7824 to have been documented since at least release 1.62. I have made it work.
7826 35. The "timeout_DNS" error in retry rules, also documented since at least
7827 1.62, also never worked. As it isn't clear exactly what this means, and
7828 clearly it isn't a major issue, I have abolished the feature by treating it
7829 as "timeout", and writing a warning to the main and panic logs.
7831 36. The display of retry rules for -brt wasn't always showing the error code
7834 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7835 timeout_connect_A, timeout_connect_MX.
7837 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7838 to the empty sender.
7840 39. The daemon was not analysing the content of -oX till after it had closed
7841 stderr and disconnected from the controlling terminal. This meant that any
7842 syntax errors were only noted on the panic log, and the return code from
7843 the command was 0. By re-arranging the code a little, I've made the
7844 decoding happen first, so such errors now appear on stderr, and the return
7845 code is 1. However, the actual setting up of the sockets still happens in
7846 the disconnected process, so errors there are still only recorded on the
7849 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7850 connections (as happens on some IP stacks) was logged at start up time as
7851 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7852 it from "IPv6 and IPv4", which means that two separate sockets are being
7855 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7856 says whether AF_INET or AF_INET6 was passed as an argument.
7858 42. Exiwhat output was messed up when time zones were included in log
7861 43. Exiwhat now gives more information about the daemon's listening ports,
7862 and whether -tls-on-connect was used.
7864 44. The "port" option of the smtp transport is now expanded.
7866 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7867 silently ignored. Now an error message is written to the main and panic
7870 46. There's a new ACL modifier called "logwrite" which writes to a log file
7871 as soon as it is encountered.
7873 47. Added $local_user_uid and $local_user_gid at routing time.
7875 48. Exim crashed when trying to verify a sender address that was being
7878 49. Exim was recognizing only a space character after ".include". It now also
7879 recognizes a tab character.
7881 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7882 extracting the relevant information from the specification. The man page no
7883 longer contains scrambled data for the -d option, and I've added a section
7884 at the front about calling Exim under different names.
7886 51. Added "extra_headers" argument to the "mail" command in filter files.
7888 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7891 53. Installed eximstats 1.29.
7893 54. Added transport_filter_timeout as a generic transport option.
7895 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7896 Cc: header lines. This was required by RFC 822, but it not required by RFC
7899 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7900 incoming messages that did not have them. Now it does so only if the
7901 message originates locally, that is, if there is no associated remote host
7902 address. When Resent- header lines are present, this applies to the Resent-
7903 lines rather than the non-Resent- lines.
7905 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7906 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7908 58. Messages for configuration errors now include the name of the main
7909 configuration file - useful now that there may be more than one file in a
7910 list (.included file names were always shown).
7912 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7913 for those rare installations that do not start the daemon as root or run it
7914 setuid root. I've cut out the call to initgroups() if the daemon is not
7917 60. The Exim user and group can now be bound into the binary as text strings
7918 that are looked up at the start of Exim's processing.
7920 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7922 62. Added $mailstore_basename variable.
7924 63. Installed patch to sieve.c from Michael Haardt.
7926 64. When Exim failed to open the panic log after failing to open the main log,
7927 the original message it was trying to log was written to stderr and debug
7928 output, but if they were not available (the usual case in production), it
7929 was lost. Now it is written to syslog before the two lines that record the
7930 failures to open the logs.
7932 65. Users' Exim filters run in subprocesses under the user's uid. It is
7933 possible for a "deliver" command or an alias in a "personal" command to
7934 provoke an address rewrite. If logging of address rewriting is configured,
7935 this fails because the process is not running as root or exim. There may be
7936 a better way of dealing with this, but for the moment (because 4.30 needs
7937 to be released), I have disabled address rewrite logging when running a
7938 filter in a non-root, non-exim process.
7944 1. The buildconfig auxiliary program wasn't quoting the value set for
7945 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7946 not defined. This bug was masked in 4.22 by the effect that was fixed in
7949 2. Some messages that were rejected after a message id was allocated were
7950 shown as "incomplete" by exigrep. It no longer does this for messages that
7951 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7953 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7954 have allow_domain_literals set, the ID did not get logged in the <= line.
7955 Domain literals are now always recognized in Message-ID: header lines.
7957 4. The first argument for a ${extract expansion item is the key name or field
7958 number. Leading and trailing spaces in this item were not being ignored,
7959 causing some misleading effects.
7961 5. When deliver_drop_privilege was set, single queue runner processes started
7962 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7963 same command in the process it spins off) were not dropping privilege.
7965 6. When the daemon running as "exim" started a queue runner, it always
7966 re-executed Exim in the spun-off process. This is a waste of effort when
7967 deliver_drop_privilege is set. The new process now just calls the
7968 queue-runner function directly.
7974 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7977 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7978 ignored. Though the use of -oP was forcing the writing of a pid file, it
7979 was always written to the default place.
7981 3. If the message "no IP address found for host xxxx" is generated during
7982 incoming verification, it is now followed by identification of the incoming
7983 connection (so you can more easily find what provoked it).
7985 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7987 5. Added some features to "harden" Exim a bit more against certain attacks:
7989 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7990 be put in Local/Makefile. This is like the never_users runtime option,
7991 but it cannot be overridden. The default setting is "root".
7993 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7994 prefix string with which any file named in a -C command line option
7997 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7998 is retained for -C and -D only if the caller of Exim is root. Without
7999 it, the exim user may also use -C and -D and retain privilege.
8001 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8002 command line option is disabled.
8004 6. Macro names set by the -D option must start with an upper case letter, just
8005 like macro names defined in the configuration file.
8007 7. Added "dereference=" facility to LDAP.
8009 8. Two instances of the typo "uknown" in the source files are fixed.
8011 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8012 the Configure-Makefile script screwed up while processing it.
8014 10. Incorporated PCRE 4.4.
8016 11. The SMTP synchronization check was not operating right at the start of an
8017 SMTP session. For example, it could not catch a HELO sent before the client
8018 waited for the greeting. There is now a check for outstanding input at the
8019 point when the greeting is written. Because of the duplex, asynchronous
8020 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8021 way, but not yet received, when the check is performed.
8023 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8024 on TCP/IP sockets, because this apparently causes some broken clients to
8027 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8028 unchanged) from the Cygwin maintainer.
8030 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8031 was supported instead of testing for mbx. Effectively a typo.
8033 15. The spa authenticator server code was not checking that the input it
8034 received was valid base64.
8036 16. The debug output line for the "set" modifier in ACLs was not showing the
8037 name of the variable that was being set.
8039 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8041 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8042 lookup on its own. Something else was needed to trigger the lookup. For
8043 example, a match in host_lookup or the need for a host name in a host list.
8044 Now, if $sender_host_name is referenced and the host name has not yet been
8045 looked up, a lookup is performed. If the lookup fails, the variable remains
8046 empty, and $host_lookup_failed is set to "1".
8048 19. Added "eqi" as a case-independent comparison operator.
8050 20. The saslauthd authentication condition could segfault if neither service
8051 nor realm was specified.
8053 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8054 error message that was logged was misleading, and incoming SMTP
8055 connections were dropped. The message is now more accurate, and temporary
8056 errors are given to SMTP connections.
8058 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8059 (except RSET) with a 421 error, until QUIT is received. However, it was
8060 failing to send a response to QUIT.
8062 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8063 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8064 ACL is now run after the helo_try_verify_hosts code.
8066 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8067 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8068 case-independent, so other case variants are also recognized). Apparently
8069 some systems use these upper case variants.
8071 25. If more than two messages were waiting for the same host, and a transport
8072 filter was specified for the transport, Exim sent two messages over the
8073 same TCP/IP connection, and then failed with "socket operation on non-
8074 socket" when it tried to send the third.
8076 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8078 27. The extern definition of crypt16() in expand.c was not being excluded when
8079 the OS had its own crypt16() function.
8081 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8082 as a preferred synonym for return_size_limit, both as an option and as an
8085 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8087 30. Changed the default configuration ACL to relax the local part checking rule
8088 for addresses that are not in any local domains. For these addresses,
8089 slashes and pipe symbols are allowed within local parts, but the sequence
8090 /../ is explicitly forbidden.
8092 31. SPA server authentication was not clearing the challenge buffer before
8095 32. log_message in a "warn" ACL statement was writing to the reject log as
8096 well as to the main log, which contradicts the documentation and doesn't
8097 seem right (because no rejection is happening). So I have stopped it.
8099 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8100 However, I am unable to do any testing of this.
8102 34. Fixed an infelicity in the appendfile transport. When checking directories
8103 for a mailbox, to see if any needed to be created, it was accidentally
8104 using path names with one or more superfluous leading slashes; tracing
8105 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8107 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8108 contents are added to the log line that is written for every discarded
8109 recipient. (Previously a log_message setting was ignored.)
8111 36. The ${quote: operator now quotes the string if it is empty.
8113 37. The install script runs exim in order to find its version number. If for
8114 some reason other than non-existence or emptiness, which it checks, it
8115 could not run './exim', it was installing it with an empty version number,
8116 i.e. as "exim-". This error state is now caught, and the installation is
8119 38. An argument was missing from the function that creates an error message
8120 when Exim fails to connect to the socket for saslauthd authentication.
8121 This could cause Exim to crash, or give a corrupted message.
8123 39. Added isip, isip4, and isip6 to ${if conditions.
8125 40. The ACL variables $acl_xx are now saved with the message, and can be
8126 accessed later in routers, transports, and filters.
8128 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8129 strings in the file are not string-expanded.
8131 42. If a MAIL command specified a SIZE value that was too large to fit into an
8132 int variable, the check against message_size_limit failed. Such values are
8133 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8134 day this will have to be increased, but I don't think I want to be around
8135 when emails are that large.
8142 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8143 iconv() is not standard in FreeBSD.
8145 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8146 IPv6 enabled. The observed symptom was a segmentation fault on return from
8147 the function os_common_find_running_interfaces() in src/os.c.
8149 3. In the check_special_case() function in daemon.c I had used "errno" as an
8150 argument name, which causes warnings on some systems. This was basically a
8151 typo, since it was named "eno" in the comments!
8153 4. The code that waits for the clock to tick (at a resolution of some fraction
8154 of a second) so as to ensure message-id uniqueness was always waiting for
8155 at least one whole tick, when it could have waited for less. [This is
8156 almost certainly not relevant at current processor speeds, where it is
8157 unlikely to ever wait at all. But we try to future-proof.]
8159 5. The function that sleeps for a time interval that includes fractions of a
8160 second contained a race. It did not block SIGALRM between setting the
8161 timer, and suspending (a couple of lines later). If the interval was short
8162 and the sigsuspend() was delayed until after it had expired, the suspension
8163 never ended. On busy systems this could lead to processes getting stuck for
8166 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8167 process, before it forks any delivery processes. The open lookup caching
8168 mechanism meant that the open file or database connection was passed into
8169 the delivery process. The problem was that delivery processes always tidy
8170 up cached lookup data. This could cause a problem for the next delivery
8171 process started by the queue runner, because the external queue runner
8172 process does not know about the closure. So the next delivery process
8173 still has data in the lookup cache. In the case of a file lookup, there was
8174 no problem because closing a file descriptor in a subprocess doesn't affect
8175 the parent. However, if the lookup was caching a connection to a database,
8176 the connection was closed, and the second delivery process was likely to
8177 see errors such as "PGSQL: query failed: server closed the connection
8178 unexpectedly". The problem has been fixed by closing all cached lookups
8179 in a queue runner before running a delivery process.
8181 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8182 seem to have the "const" qualifier which it has on other OS. I've
8185 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8186 *of the same type* (client or server) with the same public name that an
8187 error should be diagnosed.
8189 9. When Exim looked up a host name for an IP address, but failed to find the
8190 original IP address when looking up the host name (a safety check), it
8191 output the message "<ip address> does not match any IP for NULL", which was
8192 confusing, to say the least. The bug was that the host name should have
8193 appeared instead of "NULL".
8195 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8196 user that is built into the binary, and the -C or -D options is used, root
8197 privilege is dropped before the configuration file is read. In addition,
8198 logging is switched to stderr instead of the normal log files. If the
8199 configuration then re-defines the Exim user, the unprivileged environment
8200 is probably not what is expected, so Exim logs a panic warning message (but
8203 However, if deliver_drop_privilege is set, the unprivileged state may well
8204 be exactly what is intended, so the warning has been cut out in that case,
8205 and Exim is allowed to try to write to its normal log files.
8211 1. smtp_return_error_details was not giving details for temporary sender
8212 or receiver verification errors.
8214 2. Diagnose a configuration error if two authenticators have the same public
8217 3. Exim used not to create the message log file for a message until the first
8218 delivery attempt. This could be confusing when incoming messages were held
8219 for policy or load reasons. The message log file is now created at the time
8220 the message is received, and an initial "Received" line is written to it.
8222 4. The automatically generated man page for command line options had a minor
8223 bug that caused no ill effects; however, a more serious problem was that
8224 the procedure for building the man page automatically didn't always
8225 operate. Consequently, release 4.20 contains an out-of-date version. This
8226 shouldn't happen again.
8228 5. When building Exim with embedded Perl support, the script that builds the
8229 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8230 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8232 6. The freeze_tell option was not being used for messages that were frozen on
8233 arrival, either by an ACL or by local_scan().
8235 7. Added the smtp_incomplete_transaction log selector.
8237 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8238 was accepting AUTH without a new EHLO.
8240 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8241 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8244 10. Logging of TCP/IP connections (when configured) now happens in the main
8245 daemon process instead of the child process, so that the TCP/IP connection
8246 count is more accurate (but it can never be perfect).
8248 11. The use of "drop" in a nested ACL was not being handled correctly in the
8249 outer ACL. Now, if condition failure induced by the nested "drop" causes
8250 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8251 or "require"), the connection is dropped.
8253 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8254 that yield "discard" can now be used with an "accept" or a "discard" verb,
8255 but an error is generated for any others (because I can't see a useful way
8256 to define what should happen).
8258 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8259 are now processed in the same way as lines in the Exim configuration file.
8260 In particular, continuation lines are supported.
8262 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8264 15. Added -ti meaning -t -i.
8266 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8267 domains, and warn by logging if others are found.
8269 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8270 returned from GIFCONF when Exim is trying to find the list of interfaces on
8271 a host. The code in os.c has been modified to copy each ifreq to an aligned
8272 structure in all cases.
8274 Also, in some cases, the returned ifreq's were being copied to a 'struct
8275 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8276 means the last couple of bytes of an IPv6 address could be chopped if the
8277 ifreq contained only a normal sockaddr (14 bytes storage).
8279 18. Named domain lists were not supported in the hosts_treat_as_local option.
8280 An entry such as +xxxx was not recognized, and was treated as a literal
8283 19. Ensure that header lines added by a DATA ACL are included in the reject log
8284 if the ACL subsequently rejects the message.
8286 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8287 MD5 (which is deprecated).
8289 21. When testing a filter file using -bf, Exim was writing a message when it
8290 took the sender from a "From " line in the message, but it was not doing so
8291 when it took $return_path from a Return-Path: header line. It now does.
8293 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8294 with a valid header line field name (a series of printing characters
8295 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8297 23. Changed "disc" in the source to "disk" to conform to the documentation and
8298 the book and for uniformity.
8300 24. Ignore Sendmail's -Ooption=value command line item.
8302 25. When execve() failed while trying to run a command in a pipe transport,
8303 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8304 could be confused with a return value of 69 from the command itself. This
8305 has been changed to 127, the value the shell returns if it is asked to run
8306 a non-existent command. The wording for the related log line suggests a
8307 non-existent command as the problem.
8309 26. If received_header_text expands to an empty string, do not add a Received:
8310 header line to the message. (Well, it adds a token one on the spool, but
8311 marks it "old" so that it doesn't get used or transmitted.)
8313 27. Installed eximstats 1.28 (addition of -nt option).
8315 28. There was no check for failure on the call to getsockname() in the daemon
8316 code. This can fail if there is a shortage of resources on the system, with
8317 ENOMEM, for example. A temporary error is now given on failure.
8319 29. Contrary to the C standard, it seems that in some environments, the
8320 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8321 program. Exim now does this explicitly; it affects the formatting of
8322 timestamps using strftime().
8324 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8325 complaints. I've now initialized all the variables, to avoid this.
8327 32. Header lines added by a system filter were not being "seen" during
8328 transport-time rewrites.
8330 33. The info_callback() function passed to OpenSSL is set up with type void
8331 (*)(SSL *, int, int), as described somewhere. However, when calling the
8332 function (actually a macro) that sets it up, the type void(*)() is
8333 expected. I've put in a cast to prevent warnings from picky compilers.
8335 34. If a DNS black list lookup found a CNAME record, but there were no A
8336 records associated with the domain it pointed at, Exim crashed.
8338 35. If a DNS black list lookup returned more than one A record, Exim ignored
8339 all but the first. It now scans all returned addresses if a particular IP
8340 value is being sought. In this situation, the contents of the
8341 $dnslist_value variable are a list of all the addresses, separated by a
8344 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8345 to accept a host name and all its aliases if the forward lookup for any of
8346 them yielded the IP address of the incoming connection. Now it accepts only
8347 those names whose forward lookup yields the correct IP address. Any other
8348 names are discarded. This closes a loophole whereby a rogue DNS
8349 administrator could create reverse DNS records to break through a
8350 wildcarded host restriction in an ACL.
8352 37. If a user filter or a system filter that ran in a subprocess used any of
8353 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8354 the wrong values were passed to the pipe command ($thisaddress had the
8355 value of $0, $0 had the value of $1, etc). This bug was introduced by
8356 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8358 38. Improved the line breaking for long SMTP error messages from ACLs.
8359 Previously, if there was no break point between 40 and 75 characters, Exim
8360 left the rest of the message alone. Two changes have been made: (a) I've
8361 reduced the minimum length to 35 characters; (b) if it can't find a break
8362 point between 35 and 75 characters, it looks ahead and uses the first one
8363 that it finds. This may give the occasional overlong line, but at least the
8364 remaining text gets split now.
8366 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8367 file descriptors might be low, and that setting 1000 would always raise it.
8368 It turns out that in some environments, the limit is already over 1000 and
8369 that lowering it causes trouble. So now Exim takes care not to decrease it.
8371 40. When delivering a message, the value of $return_path is set to $sender_
8372 address at the start of routing (routers may change the value). By an
8373 oversight, this default was not being set up when an address was tested by
8374 -bt or -bv, which affected the outcome if any router or filter referred to
8377 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8378 log only when "message" or "log_message" are set. However, if one of the
8379 conditions was an address verification, or a call to a nested ACL, the
8380 messages generated by the underlying test were being passed through. This
8381 no longer happens. The underlying message is available in $acl_verify_
8382 message for both "message" and "log_message" expansions, so it can be
8383 passed through if needed.
8385 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8386 new expansion $bh_ to give the encoded byte string without charset
8387 translation. Translation happens only if iconv() is available; HAVE_ICONV
8388 indicates this at build time. HEADERS_CHARSET gives the charset to
8389 translate to; headers_charset can change it in the configuration, and
8390 "headers charset" can change it in an individual filter file.
8392 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8393 that creates RFC 2047 encoded "words" labels them as that charset instead
8394 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8395 expansion operator; (ii) when Exim creates a From: line for a local
8396 message; (iii) when a header line is rewritten to include a "phrase" part.
8398 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8399 buggy, causing it to skip the first lines of messages whose message ID
8400 ended in 'D'. This would not have bitten before Exim release 4.14, because
8401 message IDs were unlikely to end in 'D' before then. The effect was to have
8402 incorrect size information for certain domains.
8404 45. #include "config.h" was missing at the start of the crypt16.c module. This
8405 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8408 46. If there was a timeout during a "random" callout check, Exim treated it as
8409 a failure of the random address, and carried on sending RSET and the real
8410 address. If the delay was just some slowness somewhere, the response to the
8411 original RCPT would be taken as a response to RSET and so on, causing
8412 mayhem of various kinds.
8414 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8415 when I implemented it. It didn't allow for the fact that some option values
8416 may legitimately be negative (e.g. size_addition), and it didn't even do
8417 the right test for positive values.
8419 48. Domain names in DNS records are case-independent. Exim always looks them up
8420 in lower case. Some resolvers return domain names in exactly the case they
8421 appear in the zone file, that is, they may contain uppercase letters. Not
8422 all resolvers do this - some return always lower case. Exim was treating a
8423 change of case by a resolver as a change of domain, similar to a widening
8424 of a domain abbreviation. This triggered its re-routing code and so it was
8425 trying to route what was effectively the same domain again. This normally
8426 caused routing to fail (because the router wouldn't handle the domain
8427 twice). Now Exim checks for this case specially, and just changes the
8428 casing of the domain that it ultimately uses when it transmits the message
8431 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8434 50. If a filter generated a file delivery with a non-absolute name (possible if
8435 no home directory exists for the router), the forbid_file option was not
8438 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8439 the existing equality matching.
8441 52. Exim was using ints instead of ino_t variables in some places where it was
8442 dealing with inode numbers.
8444 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8445 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8446 called TMPDIR, and if it finds it is different, it changes its value.
8448 54. The smtp_printf() function is now made available to local_scan() so
8449 additional output lines can be written before returning. There is also an
8450 smtp_fflush() function to enable the detection of a dropped connection.
8451 The variables smtp_input and smtp_batched_input are exported to
8454 55. Changed the default runtime configuration: the message "Unknown user"
8455 has been removed from the ACL, and instead placed on the localuser router,
8456 using the cannot_route_message feature. This means that any verification
8457 failures that generate their own messages won't get overridden. Similarly,
8458 the "Unrouteable address" message that was in the ACL for unverifiable
8459 relay addresses has also been removed.
8461 56. Added hosts_avoid_esmtp to the smtp transport.
8463 57. The exicyclog script was not checking for the esoteric option
8464 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8465 will work only if exicyclog is run under the appropriate euid.
8467 58. Following a discussion on the list, the rules by which Exim recognises line
8468 endings on incoming messages have been changed. The -dropcr and drop_cr
8469 options are now no-ops, retained only for backwards compatibility. The
8470 following line terminators are recognized: LF CRLF CR. However, special
8471 processing applies to CR:
8473 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8474 nor a local message in the state where . is a terminator.
8476 (ii) If a bare CR is encountered in a header line, an extra space is added
8477 after the line terminator so as not to end the header. The reasoning
8478 behind this is that bare CRs in header lines are most likely either
8479 to be mistakes, or people trying to play silly games.
8481 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8482 was being incorrectly given as 18 bytes larger than it should have been.
8483 This is a VOB (very old bug).
8485 60. This may never have affected anything current, but just in case it has:
8486 When the local host is found other than at the start of a list of hosts,
8487 the local host, those with the same MX, and any that follow, are discarded.
8488 When the list in question was part of a longer list of hosts, the following
8489 hosts (not currently being processed) were also being discarded. This no
8490 longer happens. I'm not sure if this situation could ever has previously
8493 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8496 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8497 header. This is something that is recommended in a new Internet Draft, and
8498 is something that is documented as being done by Sendmail. There are two
8499 possible values. For messages generated by the autoreply transport, Exim
8502 Auto-Submitted: auto-replied
8504 whereas for all other generated messages (e.g. bounces) it adds
8506 Auto-Submitted: auto-generated
8508 63. The "personal" condition in filters now includes a test for the
8509 Auto-Submitted: header. If it contains the string "auto-" the message it
8510 not considered personal.
8512 64. Added rcpt_include_affixes as a generic transport option.
8514 65. Added queue_only_override (default true).
8516 66. Added the syslog_duplication option.
8518 67. If what should have been the first header line of a message consisted of
8519 a space followed by a colon, Exim was mis-interpreting it as a header line.
8520 It isn't of course - it is syntactically invalid and should therefore be
8521 treated as the start of the message body. The misbehaviour could have
8522 caused a number of strange effects, including loss of data in subsequent
8523 header lines, and spool format errors.
8525 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8526 client host had authenticated. This control can now be exercised by an ACL
8527 for more flexibility.
8529 69. By default, callouts do not happen when testing with -bh. There is now a
8530 variant, -bhc, which does actually run the callout code, including
8531 consulting and updating the callout cache.
8533 70. Added support for saslauthd authentication, courtesy of Alexander
8536 71. If statvfs() failed on the spool or log directories while checking their
8537 size for availability, Exim confusingly gave the error "space shortage".
8538 Furthermore, in debugging mode it crashed with a floating point exception.
8539 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8540 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8541 serious problem, Exim now writes to the main and panic logs when this
8542 happens, with details of the failure. It then refuses to accept the
8543 incoming message, giving the message "spool directory problem" or "log
8544 directory problem" with a 421 code for SMTP messages.
8546 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8547 0, 1, and 2 exist, because some OS complain for execs without them (see
8548 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8549 descriptors. However, the code omitted to check that the open succeeded,
8550 causing mysterious errors if for some reason the permissions on /dev/null
8551 got screwed. Now Exim writes a message to the main and panic logs, and
8552 bombs out if it can't open /dev/null.
8554 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8555 interact so that it is all more flexible. It is supposed to remain
8556 backwards compatible. Also added extra_local_interfaces.
8558 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8559 to bomb out with an assertion failure - to the client this appears as a
8560 connection drop. This problem occurs in the part of the code that was taken
8561 from the Samba project. Fortunately, the assertion is in a very simple
8562 function, so I have fixed this by reproducing the function inline in the
8563 one place where it is called, and arranging for authentication to fail
8564 instead of killing the process with assert().
8566 75. The SPA client code was not working when the server requested OEM rather
8567 than Unicode encoding.
8569 76. Added code to make require_files with a specific uid setting more usable in
8570 the case where statting the file as root fails - usually a non-root-mounted
8571 NFS file system. When this happens and the failure is EACCES, Exim now
8572 forks a subprocess and does the per-uid checking as the relevant uid.
8574 77. Added process_log_path.
8576 78. If log_file_path was not explicitly set, a setting of check_log_space or
8577 check_log_inodes was ignored.
8579 79. If a space check for the spool or log partitions fails, the incident is now
8580 logged. Of course, in the latter case the data may get lost...
8582 80. Added the %p formatting code to string_format() so that it can be used to
8583 print addresses in debug_print(). Adjusted all the address printing in the
8584 debugging in store.c to use %p rather than %d.
8586 81. There was a concern that a line of code in smtp_in.c could overflow a
8587 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8588 initially expressed, the concern was not well-founded, because trailing
8589 spaces are removed early. However, if the trailing spaces were followed by
8590 a NULL, they did not get removed, so the overflow was possible. Two fixes
8593 (a) I re-wrote the offending code in a cleaner fashion.
8594 (b) If an incoming SMTP command contains a NULL character, it is rejected
8597 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8598 runs initgroups(), so that if the Exim user is in any additional groups,
8599 they will be used during message reception.
8605 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob