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.
32 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
33 SMTP connection" log lines.
35 JH/02 Option default value updates:
36 - queue_fast_ramp (main) true (was false)
37 - remote_max_parallel (main) 4 (was 2)
39 JH/03 Cache static regex pattern compilations, for use by ACLs.
41 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
42 Make the rewrite never match and keep the logging. Trust the
43 admin to be using verify=header-syntax (to actually reject the message).
45 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
46 (under Linux) we watch the dir containing the final file; previously
47 it would be the dir with the first symlink. We still do not monitor
50 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
51 dn_expand() is happy to pass them through.
53 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
54 the file with the proof had an unchanged name, the new proof(s) were
55 loaded on top of the old ones (and nover used; the old ones were stapled).
57 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
58 more than one message arrived in a single connection a reference from
59 the earlier message could be re-used. Often a sigsegv resulted.
60 These variables were introduced in Exim 4.87.
61 Debug help from Graeme Fowler.
63 JH/09 Fix ${filter } for conditions that modify $value. Previously the
64 modified version would be used in construction the result, and a memory
67 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
68 Find and fix by Jasen Betts.
70 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
71 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
72 the systemwide configuration to override the Exim config.
74 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
75 API changes in libopendmarc.
77 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
78 pid 1, in the normal "background daemon" mode, having to drop process-
79 group leadership also lost track of needing to create listener sockets.
81 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
82 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
84 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
85 a capture group which obtained no text (eg. "(abc)*" matching zero
86 occurrences) could cause a segfault if the corresponding $<n> was
89 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
90 included a close-brace character (eg. it itself used an expansion) an
93 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
94 starting TLS. Previously it was after, meaning that attackers on such
95 ports had to be screened using the host_reject_connection main config
96 option. The new sequence aligns better with the STARTTLS behaviour, and
97 permits defences against crypto-processing load attacks, even though it
98 is strictly an incompatible change.
99 Also, avoid sending any SMTP fail response for either the connect ACL
100 or host_reject_connection, for TLS-on-connect ports.
102 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
103 Previously this was not permitted, but it makes reasonable sense.
104 While there, restore a restriction on using it from a connect ACL; given
105 the change JH/16 it could only return false (and before 4.91 was not
108 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
109 was exactly sized compared to the log buffer, a crash occurred with the
110 misleading message "bad memory reference; pool not found".
111 Found and traced by Jasen Betts.
113 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
114 dns_again_means_nonexist included an element causing a DNS lookup which
115 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
116 included (though probably not limited to) a process crash from stack
117 memory limit, or from excessive open files. Replace this with a paniclog
118 whine (as this is likely a configuration error), and returning
121 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
122 this always failed, probably leading to the usual downgrade to in-clear
125 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
126 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
127 to not checking that list for these lookups.
129 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
132 JH/23 Fix crash in string expansions. Previously, if an empty variable was
133 immediately followed by an expansion operator, a null-indirection read
134 was done, killing the process.
136 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
137 include an SMTP response string which is longer than that supported
138 by the delivering transport. Alleviate by wrapping such lines before
141 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
142 chars (RFC limit). Previously a limit of 12 items was made, which with
143 a not-impossible References: in the message being bounced could still
144 be over-large and get stopped in the transport.
146 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
147 close. Previously a bare socket close was done.
149 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
152 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
153 message being considered for delivery was already being handled by
154 another process, and having an SMTP connection already open, the function
155 to close it tried to use an uninitialized variable. This would afftect
156 high-volume sites more, especially when running mailing-list-style loads.
157 Pollution of logs was the major effect, as the other process delivered
158 the message. Found and partly investigated by Graeme Fowler.
160 JH/29 Change format of the internal ID used for message identification. The old
161 version only supported 31 bits for a PID element; the new 64 (on systems
162 which can use Base-62 encoding, which is all currently supported ones
163 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
164 and must use Base-36). The new ID is 23 characters rather than 16, and is
165 visible in various places - notably logs, message headers, and spool file
166 names. Various of the ancillary utilities also have to know the format.
167 As well as the expanded PID portion, the sub-second part of the time
168 recorded in the ID is expanded to support finer precision. Theoretically
169 this permits a receive rate from a single comms channel of better than the
171 The major timestamp part of the ID is not changed; at 6 characters it is
172 usable until about year 3700.
173 Updating from previously releases is fully supported: old-format spool
174 files are still usable, and the utilities support both formats. New
175 message will use the new format. The one hints-DB file type which uses
176 message-IDs (the transport wait- DB) will be discarded if an old-format ID
177 is seen; new ones will be built with only new-format IDs.
178 Optionally, a utility can be used to convert spool files from old to new,
179 but this is only an efficiency measure not a requirement for operation
180 Downgrading from new to old requires running a provided utility, having
181 first stopped all operations. This will convert any spool files from new
182 back to old (losing time-precision and PID information) and remove any
183 wait- hints databases.
185 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
186 we treated them as item separators when parsing for a list item, but they
187 need to be protected by the doublequotes. While there, add handling for
190 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
191 Found and fixed by Jasen Betts. No testcase for this as my usual text
192 editor insists on emitting only valid UTF-8.
194 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
195 a null-indirection SIGSEGV for the receive process.
197 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
198 -bh use. Internal checking would spot this and take a panic.
200 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
201 In 4.96 this would expand to empty.
203 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
204 certificate. Find and fix by Andreas Metzler.
206 JH/36 Add ARC info to DMARC hostory records.
208 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
209 or fakedefer. Previously the sender could discover that the message
210 had in fact been accepted.
212 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
213 sequences. Previously the input was not noted as being tainted; notably
214 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
215 bad coding of authenticators.
217 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
218 and ${tr...}. Found and diagnosed by Heiko Schlichting.
220 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
221 could be triggered by externally-supplied input. Found by Trend Micro.
224 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
225 be triggered by externally-controlled input. Found by Trend Micro.
228 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
229 be triggered by externally-controlled input. Found by Trend Micro.
232 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
233 Make the rewrite never match and keep the logging. Trust the
234 admin to be using verify=header-syntax (to actually reject the message).
236 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
239 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
245 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
246 after reception to before a subsequent reception. This should
247 mean slightly faster delivery, and also confirmation of reception
250 JH/02 Move from using the pcre library to pcre2. The former is no longer
251 being developed or supported (by the original developer).
253 JH/03 Constification work in the filters module required a major version
254 bump for the local-scan API. Specifically, the "headers_charset"
255 global which is visible via the API is now const and may therefore
256 not be modified by local-scan code.
258 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
259 sendfile() didi not account for the way the ClamAV driver code called it.
261 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
262 time check was being done for every character; replace that with one
265 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
266 sent was prefixed with a length byte.
268 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
269 RFC 5321. Previously Dovecot (at least) would log errors during
272 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
273 in 4.61 without a reason logged. Binaries will be bigger, which might
274 matter on diskspace-constrained systems, but debug is easier.
276 JH/09 Fix macro-definition during "-be" expansion testing. The move to
277 write-protected store for macros had not accounted for these runtime
278 additions; fix by removing this protection for "-be" mode.
280 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
281 handing out large-numbered file descriptors, violating the usual Unix
282 assumption (and required by Posix) that the lowest possible number will be
283 allocated by the kernel when a new one is needed. In the daemon, and any
284 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
285 are not useable for FD_SET() [and hence select()] and overwrite the stack.
286 Assorted crashes happen.
288 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
289 main-section options or in a connect ACL, the value from the first ever
290 connection was never replaced for subsequent connections. Found by
293 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
294 though only once PCRE2 was introduced: the memory accounting used under
295 debug offset allocations by an int, giving a hard trap in early startup.
296 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
298 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
299 with underbars is given. The write-protection of configuration introduced
300 in 4.95 trapped when normalisation was applied to an option not needing
303 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
305 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
306 failing to close the certificates directory, every hour or any time it
309 JH/16 Debugging initiated by an ACL control now continues through into routing
310 and transport processes. Previously debugging stopped any time Exim
311 re-execs, or for processing a queued message.
313 JH/17 The "expand" debug selector now gives more detail, specifically on the
314 result of expansion operators and items.
316 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
317 bad comparison between the option value and the name of the file to
318 be included was done, and a mismatch was wrongly identified.
319 4.88 to 4.95 are affected.
321 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
323 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
324 supplied as the db file-pair basename. Previously, if a directory
325 path was given, for example via the autoreply "once" option, the DB
326 file.pag and file.dir files would be created in that directory's
329 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
330 "taint" log_selector. These were previously deprecated.
332 JH/22 Fix static address-list lookups to properly return the matched item.
333 Previously only the domain part was returned.
335 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
336 the call into OpenSSL to send a TLS Close was being repeated; this
337 resulted in the library waiting for the peer's Close. If that was never
338 sent we waited forever. Fix by tracking send calls.
340 JH/24 The ${run} expansion item now expands its command string elements after
341 splitting. Previously it was before; the new ordering makes handling
342 zero-length arguments simpler. The old ordering can be obtained by
343 appending a new option "preexpand", after a comma, to the "run".
345 JH/25 Taint-check exec arguments for transport-initiated external processes.
346 Previously, tainted values could be used. This affects "pipe", "lmtp" and
347 "queryprogram" transport, transport-filter, and ETRN commands.
348 The ${run} expansion is also affected: in "preexpand" mode no part of
349 the command line may be tainted, in default mode the executable name
352 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
353 the the facility was not passed across execs, and only the first message
354 passed over a connection could use BDAT; any further ones using DATA.
356 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
357 uses $sending_ip_address and an interface is specified.
358 Previously any use of the local address in the EHLO name disabled
359 PIPECONNECT, the common case being to use the rDNS of it.
361 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
362 resumption. Previously verify failed because no certificate status is
363 passed on the wire for the restarted session. Fix by using the recorded
364 ocsp status of the stored session for the new connection.
366 JH/29 TLS resumption: the key for session lookup in the client now includes
367 more info that a server could potentially use in configuring a TLS
368 session, avoiding oferring mismatching sessions to such a server.
369 Previously only the server IP was used.
371 JH/30 Fix string_copyn() for limit greater than actual string length.
372 Previously the copied amount was the limit, which could result in a
373 overlapping memcpy for newly allocated destination soon after a
374 source string shorter than the limit. Found/investigated by KM.
376 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
377 close; it may be needed for a subsequent connection. This caused a
378 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
380 JH/32 Fix CHUNKING for a second message on a connection when the first was
381 rejected. Previously we did not reset the chunking-offered state, and
382 erroneously rejected the BDAT command. Investigation help from
385 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
386 an empty address. Previously the expansion returned an error.
388 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
389 proxy. Previously these were misparsed, leading to paniclog entries.
395 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
396 related applications. Previously an "H" was used where available info
397 says that "M" should be, so change to match.
399 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
400 as arguments, so an implementation trying to copy these into a local
401 buffer was taking a taint-enforcement trap. Fix by using dynamically
402 created buffers. Similar fix for radius expansion condition.
404 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
405 reasonable, eg. to count headers. Fix by using dynamically created
406 buffers rather than a local. Do similar fixes for ACL actions "dcc",
407 "log_reject_target", "malware" and "spam"; the arguments are expanded
408 so could be handling tainted values.
410 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
411 broken the (no-op) support for this sendmail command. Restore it
412 to doing nothing, silently, and returning good status.
414 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
415 record path was given (or the default used) without a leading directory
416 path, an error occurred on trying to open it. Use the transport's working
419 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
420 transport. Previously it was the name on the DNS A-record; use instead
421 the head of the CNAME chain leading there (if there is one). This seems
422 to align better with RFC 6125.
424 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
425 smtp_accept_max_per_host allocated resources which were not released
426 when the limit was exceeded. This eventually crashed the daemon. Fix
427 by adding a release action in that path.
429 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
430 expanded; previously using tainted values was rejected. Fix by using
431 dynamically-created buffers.
433 JH/09 Relax restrictions on ACL verify condition needing access to message
434 headers. Previously they were only permitted in data and non-smtp ACLs;
435 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
436 not_blind, header_sender and header_names_ascii verification.
438 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
439 Previously a macro used one argument twice; when called with the
440 argument as an expression having side-effects, incorrect operation
441 resulted. Use an inlineable function.
443 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
444 held open for a verify callout. Previously this wan not accounted for
445 and a corrupt onward SMTP conversation resulted.
447 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
448 Previously they were embedded naively in the constructed address; when
449 needed, strip the quoting and quote the entire local_part.
450 Also make the inbound_srs expansion condition handle quoting.
452 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
453 excluded, not matching the documentation.
455 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
456 was given for the sqlite_dbfile a trap resulted.
458 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
459 "name" argument resulted in a trap. There is no reason to disallow such;
460 this was a coding error.
462 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
463 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
464 spent suspended, ignoring the POSIX definition. Previously we assumed
465 it did and a constant offset from real time could be used as a correction.
466 Change to using the same clock source for the start-of-message and the
467 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
468 exists, just to get a clock slightly more aligned to reality.
470 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
471 RFC says it is optional some validators care. The missing char was not
472 intended but triggered by a line-wrap alignment. Discovery and fix by
473 Guillaume Outters, hacked on by JH.
475 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
476 name being quoted was tainted a trap would be taken. Fix by using
477 dynamically created buffers. The routine could have been called by a
478 rewrite with the "h" flag, by using the "-F" command-line option, or
479 by using a "name=" option on a control=submission ACL modifier.
481 JH/19 SPF: change the Authentication-Results expansion component to give
482 smtp.helo when the sender domain is empty. Previously it gave
485 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
486 not in 127.0.0.0/8 to help in spotting list domains taken over by a
487 domain-parking registrar.
489 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
490 Previously when a whitespace character was specified it was not inserted
491 after removing the newline.
493 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
494 the domain part of the recipient address. This overrides any tls_sni
495 option set, which was previously used.
497 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
500 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
501 is_tainted() had an off-by-one error in the overenthusiastic direction.
502 Find and fix by Gavan. Although NetBSD is not a supported platform for
503 4.94 this bug could affect other platforms.
505 PP/01 Fix default prime selection to be consistent.
506 One path used ike23 still, instead of exim.dev.20160529.3; now both
507 execution flows will use the same DH primes (currently
508 exim.dev.20160529.3).
510 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
511 option in smtp transport, to match the documentation. Previously
512 verification was not being done in some cases where it should have been.
514 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
515 than one server was defined and depending on the platform memory layout
516 details, an internal consistency trap could be hit while walking the list
519 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
520 files. The value is used by the authresults expansion item. Previously
521 if this was used in a router or transport, a crash could result.
523 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
524 have a sufficient incidence of EINTR returns from select that an
525 interaction with other operations done by the main daemon loop exposed
526 a bug in the error-handling. This was benign apart from the log
529 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
530 for consistency with delivered "=>" and failed "**" lines. While we're
531 there, handle PRX and TFO.
533 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
534 applied. This resulted, if any header-line rewrite rules were configured,
535 in a panic-log triggerable by sending a message with a long address in
536 a header. Fix by increasing the arbitrary limit to larger than a single
537 (dewrapped) 5322 header line maximum size.
539 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
540 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
541 RFC 6648 which deprecates X- options in protocols as a general practice.
542 Changeover between the implementations is handled by the mechanisms
545 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
546 a remote which uses callout/hold. Previously the local was queued.
548 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
551 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
552 log line. The asterisk is now consistently appended to the remote IP
553 (and port, if given), and will also be provided on defer and fail log
554 lines. Previously it could be placed on the local IP if that was being
555 logged, and was only provided on delivery lines.
557 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
559 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
560 authenticator client_send option. Previously the next char, after a pair
561 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
562 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
563 documentation. There is still no way to get a leading ^ immediately
564 after a NUL (ie. for the password of a PLAIN method authenticator.
566 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
567 files. For bad sizes read, delete the record and whine to paniclog.
569 JH/38 When logging an AUTH failure, as server, do not include sensitive
570 information. Previously, the credentials would be included if given
571 as part of the AUTH command line and an ACL denied authentication.
573 JH/39 Bug 2691: fix $local_part_data. When the matching list element
574 referred to a file, bad data was returned. This likely also affected
577 JH/40 The gsasl authenticator now supports caching of the salted password
578 generated by the client-side implementation. This required the addition
579 of a new variable: $auth4.
581 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
582 left undeleted; the attempt to re-create it then failed - resulting in
583 the usual "SIGHUP tp have daemon reload configuration" to not work.
584 This affected any platform not supporting "abstract" Unix-domain
585 sockets (i.e. not Linux).
587 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
588 recipients" response to RCPT in a later response, with a 250. The
589 previous coding assumed this would not happen, and under PIPELINING
590 would result in both lost and duplicate recipients for a message.
592 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
593 Previously the weighting was incorrectly applied. Similar fix for socks
594 proxies. Found and fixed by Heiko Schlichting.
596 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
597 not handle sub-lists included using the +namedlist syntax. While
598 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
599 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
602 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
603 Previously the permanent pool was used, so the sore could not be freed.
604 This meant a connection with many messages would use continually-growing
607 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
608 per-pool so as not to waste too much space. Previously a constant size
609 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
610 DOS attacks harder. The cost is wasted memory use in the larger blocks.
612 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
613 same space repeatedly, and a smaller process footprint.
615 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
616 for GnuTLS. Previously the name started "%s" which, while not a bug,
617 looked as if if might be one.
619 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
620 "continued connection") make the $proxy_* variables available. Previously
621 the information was not passed across the exec() call for subsequent
622 transport executions. This also mean that the log lines for the
623 messages can show the proxy information.
625 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
626 receive time. With modern systems the difference is significant.
627 The historical behaviour can be restored by disabling (a new) log_selector
628 "queue_time_exclusive".
630 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
631 content) were specifically tested for. Now, also cover expansions
632 resulting in ACL names and inline ACL content.
634 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
635 making it unusable in complex expressions.
637 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
638 fail with a taint-check on the spoolfile name, and leave the message
641 HS/01 Enforce absolute PID file path name.
643 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
645 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
647 PP/02 Bug 2643: Correct TLS DH constants.
648 A missing NUL termination in our code-generation tool had led to some
649 incorrect Diffie-Hellman constants in the Exim source.
650 Reported by kylon94, code-gen tool fix by Simon Arlott.
652 PP/03 Impose security length checks on various command-line options.
653 Fixes CVE-2020-SPRSS reported by Qualys.
655 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
656 better. Reported by Qualys.
658 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
659 providing a particularly obnoxious sender full name.
662 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
664 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
667 PP/08 Change default for recipients_max from unlimited to 50,000.
669 PP/09 Fix security issue with too many recipients on a message (to remove a
670 known security problem if someone does set recipients_max to unlimited,
671 or if local additions add to the recipient list).
672 Fixes CVE-2020-RCPTL reported by Qualys.
674 PP/10 Fix security issue in SMTP verb option parsing
675 Fixes CVE-2020-EXOPT reported by Qualys.
677 PP/11 Fix security issue in BDAT state confusion.
678 Ensure we reset known-good where we know we need to not be reading BDAT
679 data, as a general case fix, and move the places where we switch to BDAT
680 mode until after various protocol state checks.
681 Fixes CVE-2020-BDATA reported by Qualys.
683 HS/03 Die on "/../" in msglog file names
685 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
686 the Exim runtime user are allowed to create files.
688 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
691 QS/03 When reading the output from interpreted forward files we do not
692 pass the pipe between the parent and the interpreting process to
693 executed child processes (if any).
695 QS/04 Always die if requested from internal logging, even is logging is
698 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
699 the API; compilation noo longer completes with DMARC support included.
700 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
701 been reported on other platforms.
703 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
705 JH/56 Make the majority of info read from config files readonly, for defence-in-
706 depth against exploits. Suggestion by Qualys.
707 Not supported on Solaris 10.
709 JH/57 Fix control=fakreject for a custom message containing tainted data.
710 Previously this resulted in a log complaint, due to a re-expansion present
711 since fakereject was originally introduced.
713 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
714 modifier was given, a loop resulted.
716 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
717 pipelined SMTP command followed the BDAT LAST then it would be
718 incorrectly treated as part of the message body, causing a verification
721 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
722 require looser validation rules than those for 821-level addresses,
723 which only permit IP addresses.
729 JH/01 Avoid costly startup code when not strictly needed. This reduces time
730 for some exim process initialisations. It does mean that the logging
731 of TLS configuration problems is only done for the daemon startup.
733 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
735 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
736 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
739 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
740 DKIM signing is being done. Previously a transport_filter would always
741 disable CHUNKING, falling back to traditional DATA.
743 JH/05 Regard command-line recipients as tainted.
745 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
747 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
748 PAM library frees one of the arguments given to it, despite the
749 documentation. Therefore a plain malloc must be used.
751 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
752 on-stack buffers were used, resulting in a taint trap when DSN information
753 copied from a received message was written into the buffer.
755 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
756 the ordering of its ARC headers. This caused a crash.
758 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
759 a new record was being constructed with information from the peer, a trap
762 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
763 installation would get error messages from DMARC verify, when it hit the
764 nonexistent file indicated by the default. Distros wanting DMARC enabled
765 should both provide the file and set the option.
766 Also enforce no DMARC verification for command-line sourced messages.
768 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
769 could, depending on the platform, hang at the STARTTLS response.
771 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
772 message on a connection. Previously if one message had ARC headers and
773 the following one did not, a crash could result when adding an
774 Authentication-Results: header.
776 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
777 Exim main code and Exim-related utities. The introduction of taint
778 tracking also did many adjustments to string handling. Since then, eximon
779 frequently terminated with an assert failure.
781 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
782 check for 452 responses. This slightly helps the inefficieny of doing
783 a large alias-expansion into a recipient-limited target. The max_rcpt
784 transport option still applies (and at the current default, will override
785 the new feature). The check is done for either cause of synch, and forces
786 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
787 connection. The new facility is not tunable at this time.
789 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
790 library live data was being used, so the results became garbage. Make
791 copies while it is still usable.
793 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
794 on delivery deferred (==) and failed (**) lines (if a delivery was
795 attemtped). Previously it was only on completion (=>) lines.
797 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
798 for the expansion of the server_scram_iter and server_scram_salt options.
800 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
801 are now specifically given a NO_DATA response without hitting the system
802 resolver. The library goes on to do the now-standard TXT lookup.
803 Use of dnsdb lookups is not affected.
805 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
806 only retrieve the errormessage once. Previously two calls to dlerror()
807 were used, and the second one (for mainlog/paniclog) retrieved null
810 JH/20 Taint checking: disallow use of tainted data for
811 - the appendfile transport file and directory options
812 - the pipe transport command
813 - the autoreply transport file, log and once options
814 - file names used by the redirect router (including filter files)
816 - paths used by single-key lookups
817 Previously this was permitted.
819 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
820 adjusted the size of a major service buffer; this failed because the
821 buffer was in use at the time. Change to a compile-time increase in the
822 buffer size, when this authenticator is compiled into exim.
824 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
825 previous fast-mode was untenable in the face of glibs using mmap to
826 support larger malloc requests.
828 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
829 New values supported, if defined on system where compiled:
830 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
831 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
833 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
834 running a limited number of proceses in parallel, a benefit is gained. The
835 amount varies with the platform hardware and load. The use of the option
836 queue_run_in_order means we cannot do this, as ordering becomes
839 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
840 had introduced a string-copy (for ensuring NUL-termination) which was not
841 appropriate for that case, which can include embedded NUL bytes in the
842 block of data. Investigation showed the copy to actually be needless, the
843 data being length-specified.
845 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
846 done during a receiving connection, and both used TLS, global info was
847 used rather than per-connection info for tracking the state of data
848 queued for transmission. This could result in a connection hang.
850 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
851 Previously, when delivering serveral messages down a single connection
852 only the first would provide a SIZE. This was due to the size information
853 not being properly tracked.
855 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
856 TAI (at 37 seconds currently), pretend to be in UTC for time-related
857 expansion and logging. Previously, spurious values such as a future
858 minute could be seen.
860 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
861 it could crash from a null-deref. This could also affect the
862 ${addresses: } operator and ${readsock } item.
864 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
865 message following a mime one, the variable was not reset.
867 JH/30 When an pipelined-connect fails at the first response, assume incorrect
868 cached capability (perhaps the peer reneged?) and immediately retry in
871 JH/31 Fix spurious detection of timeout while writing to transport filter.
873 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
874 an attempt to copy the string was made before checking it.
876 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
877 taint of the lookup key was maintained; we now regard the presence in the
878 filesystem as sufficient validation.
880 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
881 argument is supplied.
883 JH/35 The dsearch lookup now requires that the directory is an absolute path.
884 Previously this was not checked, and nonempty relative paths made an
885 access under Exim's current working directory.
887 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
888 Previously no event was raised.
890 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
891 parameter supplied by the sender MAIL FROM command. Previously it was
892 ignored, and only the check_spool_space option value for the required
895 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
896 the size of the signing public-key. Previously it was instead giving
897 the size of the signature hash.
899 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
900 the default. See the (new) dkim_verify_min_keysizes option.
902 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
903 and an ACL use a lookup for checking either the local_part or domain,
904 stale data could be accessed. Ensure that variable references are
905 dropped between messages.
907 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
908 by the client was not checked as pointing within response data before
909 being used. A malicious client could thus cause an out-of-bounds read and
910 possibly gain authentication. Fix by adding the check.
912 JH/42 Internationalisation: change the default for downconversion in the smtp
913 transport to be "if needed". Previously it was "as previously set" for
914 the message, which usually meant "if needed" for message-submission but
915 "no" for everything else. However, MTAs have been seen using SMTPUTF8
916 even when the envelope addresses did not need it, resulting in forwarding
917 failures to non-supporting MTAs. A downconvert in such cases will be
918 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
919 transport. The change does mean that addresses needing conversion will
920 be converted when previously a delivery failure would occur.
922 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
923 response was received it would be used unchecked in a fail-DSN, violating
924 standards on line-length limits. Truncate if needed.
926 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
927 doesn't work. (Additionally add a new main config option to configure the
934 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
935 side, to decode a TLS 1.3 packet capture.
937 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
938 Previously the default library behaviour applied, sending two, each in
941 JH/03 Debug output for ACL now gives the config file name and line number for
944 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
946 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
948 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
949 buffer overrun for (non-chunking) other transports.
951 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
952 TLS1.3, means that a server rejecting a client certificate is not visible
953 to the client until the first read of encrypted data (typically the
954 response to EHLO). Add detection for that case and treat it as a failed
955 TLS connection attempt, so that the normal retry-in-clear can work (if
956 suitably configured).
958 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
959 and/or domain. Found and fixed by Jason Betts.
961 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
962 configuration). If a CNAME target was not a wellformed name pattern, a
965 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
966 the OS reports them interleaved with other addresses.
968 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
969 used both for input and for a verify callout, both encrypted, SMTP
970 responses being sent by the server could be lost. This resulted in
971 dropped connections and sometimes bounces generated by a peer sending
974 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
975 string. Previously it was possible to cause undefined behaviour in a
976 library routine (usually a crash). Found by "zerons".
978 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
981 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
982 API was removed, so update to use the newer ones.
984 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
985 any timeout set, is taking a long time. Previously we would hang on to a
986 rotated logfile "forever" if the input was arriving with long gaps
987 (a previous attempt to fix addressed lack, for a long time, of initial
990 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
991 shared (NFS) environment. The length of the tempfile name is now
992 4 + 16 ("hdr.$message_exim_id") which might break on file
993 systems which restrict the file name length to lower values.
996 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
997 shared (NFS) environment.
999 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1000 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1003 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1004 on some platforms for bit 31.
1006 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1007 to changes apparently associated with TLS1.3 handling some of the APIs
1008 previously used were either nonfunctional or inappropriate. Strings
1009 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1010 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1011 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1012 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1013 and the use of specific cipher names in the encrypted= ACL condition.
1015 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1017 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1018 verification result was not updated unless hosts_require_ocsp applied.
1020 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1021 queue_list_requires_admin set to false, non-admin users were denied the
1024 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1025 directory-of-certs mode. Previously they were advertised despite the
1028 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1029 A single TCP connection by a client will now hold a TLS connection open
1030 for multiple message deliveries, by default. Previously the default was to
1033 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1034 default. If built with the facility, DANE will be used. The facility
1035 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1037 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1038 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1039 must be defined and you must still, unless you define DISABLE_TLS, manage
1040 the the include-dir and library-file requirements that go with that
1041 choice. Non-TLS builds are still supported.
1043 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1046 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1047 default. If the platform supports and has the facility enabled, it will
1048 be requested on all coneections.
1050 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1051 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1053 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1055 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1056 success-DSN messages. Previously the From: header was always the default
1057 one for these; the option was ignored.
1059 JH/28 Fix the timeout on smtp response to apply to the whole response.
1060 Previously it was reset for every read, so a teergrubing peer sending
1061 single bytes within the time limit could extend the connection for a
1062 long time. Credit to Qualsys Security Advisory Team for the discovery.
1064 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1065 delivery address, which leaked information of the results of local
1066 forwarding. Change to the original envelope recipient address, per
1069 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1070 requested. Previously not bounce was generated and a log entry of
1071 error ignored was made.
1073 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1075 JH/32 Introduce a general tainting mechanism for values read from the input
1076 channel, and values derived from them. Refuse to expand any tainted
1077 values, to catch one form of exploit.
1079 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1080 was unused and the unexpanded text used for the test. Found and
1081 fixed by Ruben Jenster.
1083 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1084 an attempt to use a TLS library read routine dereffed a nul pointer,
1087 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1088 them in our smtp response.
1090 JH/36 Have the general router option retry_use_local_part default to true when
1091 any of the restrictive preconditions are set (to anything). Previously it
1092 was only for check_local user. The change removes one item of manual
1093 configuration which is required for proper retries when a remote router
1094 handles a subset of addresses for a domain.
1096 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1097 link count into consideration.
1099 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1100 caused the extension of big_buffer, the following lines were ignored.
1102 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1103 accordance with RFC 2308. Previously there was no expiry, so a longlived
1104 receive process (eg. due to ACL delays) versus a short SOA value could
1107 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1109 JH/39 Promote DMARC support to mainline.
1111 JH/40 Bug 2452: Add a References: header to DSNs.
1113 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1114 parameters. The relevant library call is documented as "Deprecated: This
1115 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1116 3.6.0, DH parameters are negotiated following RFC7919."
1118 HS/06 Change the default of dnssec_request_domains to "*"
1120 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1121 carried on and emitted a BDAT command, even when PIPELINING was not
1124 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1125 buffer was used for the filename, resulting in a trap when tainted
1126 arguments (eg. $domain) were used.
1128 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1129 recommended to avoid a possible server-load attack. The feature can be
1130 re-enabled via the openssl_options main cofiguration option.
1132 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1133 for version 4.90 - adding a "more data" boolean to the arguments.
1134 Bumped the ABI version number also, this having been missed previously;
1135 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1136 respect of usage of smtp_printf() by either local_scan code or libraries
1137 accessed via the ${dlfunc } expansion item. Both will need coding
1138 adjustment for any calls to smtp_printf() to match the new function
1139 signature; a FALSE value for the new argument is always safe.
1141 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1142 the file-offset (which the Linux syscall does, and exim expects); this
1143 resulted in an indefinite loop.
1145 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1146 to do ARC verification. The Authentication-Results: header line added
1147 by the configuration then had no ARC item.
1149 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1150 an incorrect mode was used for reading the result, resulting in it being
1157 JH/01 Remove code calling the customisable local_scan function, unless a new
1158 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1160 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1161 non-signal-safe functions being used.
1163 JH/03 Bug 2269: When presented with a received message having a stupidly large
1164 number of DKIM-Signature headers, disable DKIM verification to avoid
1165 a resource-consumption attack. The limit is set at twenty.
1167 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1168 report of oldest_pass in ${authres } in consequence, and separate out
1169 some descriptions of reasons for verification fail.
1171 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1172 files in the spool were present and unlocked. A queue-runner could spot
1173 them, resulting in a duplicate delivery. Fix that by doing the unlock
1174 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1175 add more error-checking on spoolfile handling while that code is being
1178 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1179 No known attacks, no CVE, this is defensive hardening.
1181 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1182 a queue-runner could start a delivery while other operations were ongoing.
1183 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1184 Found and investigated by Tim Stewart. Fix by using the open message data
1185 file handle rather than opening another, and not locally closing it (which
1186 releases a lock) for that case, while creating the temporary .eml format
1187 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1189 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1190 $sender_verify_failure/$recipient_verify_failure to "random".
1192 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1195 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1196 Previously this would segfault.
1198 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1201 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1202 like zero, since the resolver should be doing this for us, But we need one
1203 as a CNAME but no MX presence gets the CNAME returned; we need to check
1204 that doesn't point to an MX to declare it "no MX returned" rather than
1205 "error, loop". A new main option is added so the older capability of
1206 following some limited number of chain links is maintained.
1208 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1210 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1211 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1212 now-deprecated earlier definitions used only specified the range up to TLS
1213 1.2 (in the older-version library docs).
1215 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1217 JH/15 Rework TLS client-side context management. Stop using a global, and
1218 explicitly pass a context around. This enables future use of TLS for
1219 connections to service-daemons (eg. malware scanning) while a client smtp
1220 connection is using TLS; with cutthrough connections this is quite likely.
1222 JH/16 Fix ARC verification to do AS checks in reverse order.
1224 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1226 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1227 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1228 Previously the "utf8" would be re-prepended for every additional message.
1230 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1231 Previously thery were accepted, resulting in issues when attempting to
1232 forward messages to a non-supporting MTA.
1234 PP/02 Let -n work with printing macros too, not just options.
1236 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1237 one parent address was copied, and bogus data was used at delivery-logging
1238 time. Either a crash (after delivery) or bogus log data could result.
1239 Discovery and analysis by Tim Stewart.
1241 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1242 Previously if the string ended mid-character, we did not insert the
1243 promised '?' replacement.
1245 PP/04 Documentation: current string operators work on bytes, not codepoints.
1247 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1248 should pack well giving a smaller memory footprint so better caching and
1249 therefore performance. Group the declarations where this can't be done so
1250 that the byte-sized flag variables are not interspersed among pointer
1251 variables, giving a better chance of good packing by the compiler.
1253 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1254 non-null, to avoid issues with sites running BATV. Previously reports were
1255 sent with an empty envelope sender so looked like bounces.
1257 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1258 The ignore_error flag wasn't being returned from the filter subprocess so
1259 was not set for later routers. Investigation and fix by Matthias Kurz.
1261 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1262 and a msg:complete for the whole, when a message is manually removed using
1263 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1265 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1266 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1267 hope that is portable enough.
1269 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1270 requiring a known-CA anchor certificate; make it now rely entirely on the
1271 TLSA as an anchor. Checking the name on the leaf cert against the name
1272 on the A-record for the host is still done for TA (but not for EE mode).
1274 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1275 included in delivery lines for non-proxied connections, when compiled with
1276 SUPPORT_SOCKS and running with proxy logging enabled.
1278 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1279 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1280 move the existing event to fire before the normal logging of message
1281 failure so that custom logging is bracketed by normal logging.
1283 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1284 msg:fail:internal event. Developement by Matthias Kurz.
1286 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1287 far too small for todays use of crypto signatures stored there. Go all
1288 the way to the max DNS message size of 64kB, even though this might be
1289 overmuch for IOT constrained device use.
1291 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1292 copy a string over itself. The library routine is documented as not
1293 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1295 JH/32 For main options check_spool_space and check_inode_space, where the
1296 platform supports 64b integers, support more than the previous 2^31 kB
1297 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1298 the previous G, M, k.
1300 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1301 $authenticated_fail_id variable on authentication failure. Previously
1304 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1305 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1306 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1307 GNUTLS_SEC_PARAM_MEDIUM.
1309 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1310 side. Previously we would continue as if no SNI had been received.
1312 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1313 "<" character, which should be a list-separator specification, we walked
1314 off past the nul-terimation.
1316 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1317 causes) even when the retry time is not yet met. Previously they were
1318 not, meaning that when (say) an account was over-quota and temp-rejecting,
1319 and multiple senders' messages were queued, only one sender would get
1320 notified on each configured delay_warning cycle.
1322 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1324 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1325 cipher-suites, an error can be left on the stack even for a succeeding
1326 accept; this results in impossible error messages when a later operation
1329 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1330 return error codes indicating retry. Under TLS1.3 this becomes required.
1332 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1333 it only wrote the new authenticators, resulting in a lack of tracking of
1334 peer changes of ESMTP extensions until the next cache flush.
1336 JH/41 Fix the loop reading a message header line to check for integer overflow,
1337 and more-often against header_maxsize. Previously a crafted message could
1338 induce a crash of the recive process; now the message is cleanly rejected.
1340 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1341 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1347 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1348 When redis_servers is set to a list of > 1 element, and the Redis servers
1349 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1350 case of MOVED into a DEFER case instead, thus moving the query onto the
1351 next server in the list. For a cluster of N elements, all N servers must
1352 be defined in redis_servers.
1354 GF/02 Catch and remove uninitialized value warning in exiqsumm
1355 Check for existence of @ARGV before looking at $ARGV[0]
1357 JH/01 Replace the store_release() internal interface with store_newblock(),
1358 which internalises the check required to safely use the old one, plus
1359 the allocate and data copy operations duplicated in both (!) of the
1360 extant use locations.
1362 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1363 modifier. This matches the restriction on the commandline.
1365 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1366 Previously only the last row was returned.
1368 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1369 we assumed that tags in the header were well-formed, and parsed the
1370 element content after inspecting only the first char of the tag.
1371 Assumptions at that stage could crash the receive process on malformed
1374 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1375 While running the DKIM ACL we operate on the Permanent memory pool so that
1376 variables created with "set" persist to the DATA ACL. Also (at any time)
1377 DNS lookups that fail create cache records using the Permanent pool. But
1378 expansions release any allocations made on the current pool - so a dnsdb
1379 lookup expansion done in the DKIM ACL releases the memory used for the
1380 DNS negative-cache, and bad things result. Solution is to switch to the
1381 Main pool for expansions.
1382 While we're in that code, add checks on the DNS cache during store_reset,
1383 active in the testsuite.
1384 Problem spotted, and debugging aided, by Wolfgang Breyha.
1386 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1387 When none of the hosts presented to a transport match an already-open
1388 connection, close it and proceed with the list. Previously we would
1389 queue the message. Spotted by Lena with Yahoo, probably involving
1392 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1393 Previously a spurious "250 OK id=" response was appended to the proper
1396 JH/08 The "support for" informational output now, which built with Content
1397 Scanning support, has a line for the malware scanner interfaces compiled
1398 in. Interface can be individually included or not at build time.
1400 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1401 by the template makefile "src/EDITME". The "STREAM" support for an older
1402 ClamAV interface method is removed.
1404 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1405 rows affected is given instead).
1407 JH/11 The runtime Berkeley DB library version is now additionally output by
1408 "exim -d -bV". Previously only the compile-time version was shown.
1410 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1411 SMTP connection. Previously, when one had more recipients than the
1412 first, an abortive onward connection was made. Move to full support for
1413 multiple onward connections in sequence, handling cutthrough connection
1414 for all multi-message initiating connections.
1416 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1417 routers. Previously, a multi-recipient message would fail to match the
1418 onward-connection opened for the first recipient, and cause its closure.
1420 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1421 a timeout on read on a GnuTLS initiating connection, resulting in the
1422 initiating connection being dropped. This mattered most when the callout
1423 was marked defer_ok. Fix to keep the two timeout-detection methods
1426 JH/15 Relax results from ACL control request to enable cutthrough, in
1427 unsupported situations, from error to silently (except under debug)
1428 ignoring. This covers use with PRDR, frozen messages, queue-only and
1431 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1433 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1434 metadata, resulting in a crash in free().
1436 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1437 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1438 Broken also in d185889f4, with init system revamp.
1440 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1441 Previously we abruptly closed the connection after reading a malware-
1442 found indication; now we go on to read the "scan ok" response line,
1445 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1446 ACL. Previously, a crash would result.
1448 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1449 macro text after a replacement (previously it was only once per line) and
1450 by skipping builtin macros when searching for an uppercase lead character.
1452 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1453 for the build is renamed.
1455 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1456 was allocated for every new TLS startup, meaning one per message. Fix
1457 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1459 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1460 reported the original. Fix to report (as far as possible) the ACL
1461 result replacing the original.
1463 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1464 OpenSSL. Certificate information is loaded for every new TLS startup,
1465 and the resources needed to be freed.
1467 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1469 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1472 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1473 DATA response info to the (existing) per-recipient response info for
1474 the "C=" log element. It can have useful tracking info from the
1475 destination system. Patch from Simon Arlott.
1477 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1478 length value. Previously this would segfault.
1480 HS/02 Support Avast multiline protoocol, this allows passing flags to
1481 newer versions of the scanner.
1483 JH/28 Ensure that variables possibly set during message acceptance are marked
1484 dead before release of memory in the daemon loop. This stops complaints
1485 about them when the debug_store option is enabled. Discovered specifically
1486 for sender_rate_period, but applies to a whole set of variables.
1487 Do the same for the queue-runner and queue-list loops, for variables set
1488 from spool message files. Do the same for the SMTP per-message loop, for
1489 certain variables indirectly set in ACL operations.
1491 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1492 as a multi-recipient message from a mailinglist manager). The coding had
1493 an arbitrary cutoff number of characters while checking for more input;
1494 enforced by writing a NUL into the buffer. This corrupted long / fast
1495 input. The problem was exposed more widely when more pipelineing of SMTP
1496 responses was introduced, and one Exim system was feeding another.
1497 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1498 receiving system, and refused recipients seen by the sending system
1499 (propating to people being dropped from mailing lists).
1500 Discovered and pinpointed by David Carter.
1502 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1503 replaced by the ${authresults } expansion.
1505 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1507 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1508 allows proper process termination in container environments.
1510 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1511 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1513 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1514 and "err_perm", deprecated since 4.83 when the RFC-defined words
1515 "temperror" and "permerror" were introduced.
1517 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1518 transport-filters or DKIM-signing. The restriction was lost in the
1519 consolidation of verify-callout and delivery SMTP handling.
1520 Extend the restriction to also cover ARC-signing.
1522 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1523 in defer=pass mode supply a 450 to the initiator. Previously the message
1526 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1527 tls_require_ciphers is used as before.
1529 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1530 "pass_unscanned". Only tmpfails from the scanner are written to
1531 the paniclog, as they may require admin intervention (permission
1532 denied, license issues). Other scanner errors (like decompression
1533 bombs) do not cause a paniclog entry.
1535 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1536 Previously it was possible to log spurious information in receive log
1539 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1540 triggered odd behaviour from Outlook Express clients.
1542 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1545 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1546 since the IETF WG has not yet settled on that versus the original
1547 "bare" representation.
1549 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1550 Previously the millisecond value corrupted the output.
1551 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1552 corrupted the output.
1558 JH/01 Rework error string handling in TLS interface so that the caller in
1559 more cases is responsible for logging. This permits library-sourced
1560 string to be attached to addresses during delivery, and collapses
1561 pairs of long lines into single ones.
1563 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1564 during configuration. Wildcards are allowed and expanded.
1566 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1567 This permits better logging.
1569 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1570 do not close it down and have the child transport start it up again on
1571 the passed-on TCP connection. Instead, proxy the child (and any
1572 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1573 affected: the continued delivery log lines do not have any DNSSEC, TLS
1574 Certificate or OCSP information. TLS cipher information is still logged.
1576 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1577 identical IP addresses on different listening ports. Will also affect
1580 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1581 add noisy ifdef guards to special-case this sillyness.
1582 Patch from Bernd Kuhls.
1584 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1585 than 255 are no longer allowed.
1587 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1588 Disable the session-cache too, which might reduce our load. Since we
1589 currrectly use a new context for every connection, both as server and
1590 client, there is no benefit for these.
1591 GnuTLS appears to not support tickets server-side by default (we don't
1592 call gnutls_session_ticket_enable_server()) but client side is enabled
1593 by default on recent versions (3.1.3 +) unless the PFS priority string
1596 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1597 <https://reproducible-builds.org/specs/source-date-epoch/>.
1599 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1600 the check for any unsuccessful recipients did not notice the limit, and
1601 erroneously found still-pending ones.
1603 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1604 MSG_MORE. Only in-clear (not on TLS connections).
1606 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1607 transport-filter is involved we can buffer the headers in memory for
1608 creating the signature, and read the spool data file once for the
1609 signature and again for transmission.
1611 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1612 4.77 as the kernel support then wasn't solid, having issues in 64bit
1613 mode. Now, it's been long enough. Add support for FreeBSD also.
1615 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1616 case where the routing stage had gathered several addresses to send to
1617 a host before calling the transport for the first, we previously failed
1618 to close down TLS in the old transport process before passing the TCP
1619 connection to the new process. The new one sent a STARTTLS command
1620 which naturally failed, giving a failed delivery and bloating the retry
1621 database. Investigation and fix prototype from Wolfgang Breyha.
1623 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1624 false-negatives in the check that the sender had not preempted a response
1625 or prompt from Exim (running as a server), due to that code's lack of
1626 awareness of the SMTP input buffering.
1628 PP/04 Add commandline_checks_require_admin option.
1629 Exim drops privileges sanely, various checks such as -be aren't a
1630 security problem, as long as you trust local users with access to their
1631 own account. When invoked by services which pass untrusted data to
1632 Exim, this might be an issue. Set this option in main configuration
1633 AND make fixes to the calling application, such as using `--` to stop
1636 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1637 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1638 responses to those, into a single TLS record each way (this usually means
1639 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1642 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1643 affects you only if you're dancing at the edge of the param size limits.
1644 If you are, and this message makes sense to you, then: raise the
1645 configured limit or use OpenSSL 1.1. Nothing we can do for older
1648 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1649 cmdline element to get the documented default one. Previously it was
1652 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1653 are unsuable for non-message-specific reasons - eg. connection timeout,
1654 banner-time rejection.
1656 JH/16 Fix logging of delivery remote port, when specified by router, under
1659 PP/06 Repair manualroute's ability to take options in any order, even if one
1660 is the name of a transport.
1663 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1665 JH/17 Change the list-building routines interface to use the expanding-string
1666 triplet model, for better allocation and copying behaviour.
1668 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1669 Previously it was constructed the first time a possibly-matching string
1670 was met in the configuration file input during startup; now it is done
1673 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1674 compatible one, to avoid the (poorly documented) possibility of a config
1675 file in the working directory redirecting the DB files, possibly correpting
1676 some existing file. CVE-2017-10140 assigned for BDB.
1678 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1679 cache-hot. Previously, although the result was properly cached, the
1680 initial verify call returned a defer.
1682 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1683 the main verify for receipient in uncached-mode.
1685 JH/22 Retire historical build files to an "unsupported" subdir. These are
1686 defined as "ones for which we have no current evidence of testing".
1688 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1689 if present. Previously it was ignored.
1691 JH/24 Start using specified-initialisers in C structure init coding. This is
1692 a C99 feature (it's 2017, so now considered safe).
1694 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1695 if was a fixed-sized field and bitmask ops via macros; it is now more
1698 PP/07 GitHub PR 56: Apply MariaDB build fix.
1699 Patch provided by Jaroslav Škarvada.
1701 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1702 during Coverity cleanups [4.87 JH/47]
1703 Diagnosis and fix provided by Michael Fischer v. Mollard.
1705 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1706 the right size to place the terminating semicolon on its own folded
1707 line, the header hash was calculated to an incorrect value thanks to
1708 the (relaxed) space the fold became.
1710 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1711 and confused the parent.
1713 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1714 which could crash as a result. This could lead to undeliverable messages.
1716 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1719 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1720 matters on fast-turnover and PID-randomising systems, which were getting
1721 out-of-order delivery.
1723 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1724 a possibly-overlapping copy. The symptom was that "Remote host closed
1725 connection in response to HELO" was logged instead of the actual 4xx
1728 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1729 Previously only that bufferd was discarded, resulting in SYMTP command
1732 JH/32 DKIM: when a message has multiple signatures matching an identity given
1733 in dkim_verify_signers, run the dkim acl once for each. Previously only
1734 one run was done. Bug 2189.
1736 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1737 "panic the current process" to "deliberately defer". The panic log is
1738 still written with the problem list name; the mail and reject logs now
1739 get a temp-reject line for the message that was being handled, saying
1740 something like "domains check lookup or other defer". The SMTP 451
1741 message is still "Temporary local problem".
1743 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1744 A crafted sequence of BDAT commands could result in in-use memory beeing
1745 freed. CVE-2017-16943.
1747 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1748 from SMTP input. Previously it was always done; now only done for DATA
1749 and not BDAT commands. CVE-2017-16944.
1751 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1752 to the message (such as an overlong header line). Previously this was
1753 not done and we did not exit BDAT mode. Followon from the previous item
1754 though a different problem.
1760 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1761 than -2003 did; needs libidn2 in addition to libidn.
1763 JH/02 The path option on a pipe transport is now expanded before use.
1765 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1766 Patch provided by "Björn", documentation fix added too.
1768 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1769 missing a wire-to-host endian conversion.
1771 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1772 close after a BDAT command line could be taken as a following command,
1773 giving a synch failure. Fix by only checking for synch immediately
1774 before acknowledging the chunk.
1776 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1777 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1778 macro. Patches provided by Josh Soref.
1780 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1781 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1782 by IANA as a service extension. However, John Klensin suggests that we
1785 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1786 the dkim code may be unix-mode line endings rather than smtp wire-format
1787 CRLF, so prepend a CR to any bare LF.
1789 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1790 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1792 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1793 the first were themselves being wrongly included in the feed into dkim
1794 processing; with most chunk sizes in use this resulted in an incorrect
1795 body hash calculated value.
1797 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1798 DKIM signature block, for verification. Although advised against by
1799 standards it is specifically not ruled illegal.
1801 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1803 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1804 missing a body hash (the bh= tag).
1806 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1807 It seems that HAProxy sends the Proxy Protocol information in clear and
1808 only then does a TLS startup, so do the same.
1810 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1811 TCP connections (such as for Spamd) unless the daemon successfully set
1812 Fast Open mode on its listening sockets. This fixes breakage seen on
1813 too-old kernels or those not configured for Fast Open, at the cost of
1814 requiring both directions being enabled for TFO, and TFO never being used
1815 by non-daemon-related Exim processes.
1817 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1818 endings, at least on the first header line. Try to canonify any that get
1819 past that check, despite the cost.
1821 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1822 now limited to an arbitrary five deep, while parsing addresses with the
1823 strip_excess_angle_brackets option enabled.
1825 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1826 instead leave the unprompted TLS handshake in socket buffer for the
1827 TLS library to consume.
1829 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1831 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1833 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1834 region in one operation, for speed, and this leaves assigned pointers
1835 dangling. Add checks run only under the testsuite which checks all
1836 variables at a store-reset and panics on a dangling pointer; add code
1837 explicitly nulling out all the variables discovered. Fixes one known
1838 bug: a transport crash, where a dangling pointer for $sending_ip_address
1839 originally assigned in a verify callout, is re-used.
1841 PP/06 Drop '.' from @INC in various Perl scripts.
1843 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1845 PP/08 Reduce a number of compilation warnings under clang; building with
1846 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1847 should be warning-free.
1849 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1851 HS/01 Fix portability problems introduced by PP/08 for platforms where
1852 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1854 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1855 chunk. This allows us to accept broken chunked messages. We need a more
1856 general solution here.
1858 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1859 already-broken messages in the queue.
1861 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1863 JH/19 Fix reference counting bug in routing-generated-address tracking.
1869 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1870 supports it and a size is available (ie. the sending peer gave us one).
1872 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1873 years of being deprecated). The replacements are the ACLs
1874 acl_smtp_mime and acl_not_smtp_mime.
1876 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1877 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1878 or even an in-clear connection were permitted. Now, if the host lookup
1879 was dnssec and dane was requested then the host is only used if the
1880 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1881 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1882 if one fails this test.
1883 This means that a poorly-configured remote DNS will make it incommunicado;
1884 but it protects against a DNS-interception attack on it.
1886 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1887 non-noisy when a race steals the message being considered.
1889 JH/05 If main configuration option tls_certificate is unset, generate a
1890 self-signed certificate for inbound TLS connections.
1892 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1893 in rewrites and routers.
1895 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1896 and logged a warning sing 4.83; now they are a configuration file error.
1898 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1899 (lacking @domain). Apply the same qualification processing as RCPT.
1901 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1903 JH/10 Support ${sha256:} applied to a string (as well as the previous
1906 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1907 a cutthrough deliver is pending, as we always want to make a connection.
1908 This also avoids re-routing the message when later placing the cutthrough
1909 connection after a verify cache hit.
1910 Do not update it with the verify result either.
1912 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1913 when routing results in more than one destination address.
1915 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1916 signing (which inhibits the cutthrough capability). Previously only
1917 the presence of an option was tested; now an expansion evaluating as
1918 empty is permissible (obviously it should depend only on data available
1919 when the cutthrough connection is made).
1921 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1922 the relevant preceding SMTP command did not note the pipelining mode.
1924 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1925 Previously they were not counted.
1927 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1928 as one having no matching records. Previously we deferred the message
1929 that needed the lookup.
1931 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1932 distinguished as "(=".
1934 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1935 for missing MX records. Previously it only worked for missing A records.
1937 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1939 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1940 after the data-go-ahead and data-ack. Patch from Jason Betts.
1942 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1943 even for a "none" policy. Patch from Tony Meyer.
1945 JH/22 Fix continued use of a connection for further deliveries. If a port was
1946 specified by a router, it must also match for the delivery to be
1949 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1950 When one of the recipients of a message was unsuitable for the connection
1951 (has no matching addresses), we lost track of needing to mark it
1952 deferred. As a result mail would be lost.
1954 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1956 JH/25 Decoding ACL controls is now done using a binary search; the source code
1957 takes up less space and should be simpler to maintain. Merge the ACL
1958 condition decode tables also, with similar effect.
1960 JH/26 Fix problem with one_time used on a redirect router which returned the
1961 parent address unchanged. A retry would see the parent address marked as
1962 delivered, so not attempt the (identical) child. As a result mail would
1965 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1966 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1967 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1970 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1971 Main config options check_{log,spool}_{inodes,space} are now
1972 100 inodes, 10MB unless set otherwise in the configuration.
1974 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1975 Previously it only applied to the main-section connection policy
1978 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1980 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1981 by me. Added RFC7919 DH primes as an alternative.
1983 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1984 are not in the system include path.
1986 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1987 GnuTLS, when a session startup failed (eg because the client disconnected)
1988 Exim did stdio operations after fclose. This was exposed by a recent
1989 change which nulled out the file handle after the fclose.
1991 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1992 signed directly by the cert-signing cert, rather than an intermediate
1993 OCSP-signing cert. This is the model used by LetsEncrypt.
1995 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1997 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1998 an incoming connection.
2000 HS/02 Bug 1802: Do not half-close the connection after sending a request
2003 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2004 fallback to "prime256v1".
2006 JH/34 SECURITY: Use proper copy of DATA command in error message.
2007 Could leak key material. Remotely exploitable. CVE-2016-9963.
2013 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2014 and 3.4.4 - once the server is enabled to respond to an OCSP request
2015 it does even when not requested, resulting in a stapling non-aware
2016 client dropping the TLS connection.
2018 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2019 support variable-length bit vectors. No functional change.
2021 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2022 The I= interface field on outgoing lines is now after the H= remote
2023 host field, same as incoming lines. There is a separate
2024 outgoing_interface log selector which allows you to disable the
2027 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2028 If not running log_selector +smtp_connection the mainlog would be held
2029 open indefinitely after a "too many connections" event, including to a
2030 deleted file after a log rotate. Leave the per net connection logging
2031 leaving it open for efficiency as that will be quickly detected by the
2032 check on the next write.
2034 HS/01 Bug 1671: Fix post transport crash.
2035 Processing the wait-<transport> messages could crash the delivery
2036 process if the message IDs didn't exist for some reason. When
2037 using 'split_spool_directory=yes' the construction of the spool
2038 file name failed already, exposing the same netto behaviour.
2040 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2041 mime_regex ACL conditions.
2043 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2044 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2045 to HELO, local diagnostic string.
2047 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2048 log line to debug. Even when configured with a tls authenticator many
2049 client connections are expected to not authenticate in this way, so
2050 an authenticate fail is not an error.
2052 HS/02 Add the Exim version string to the process info. This way exiwhat
2053 gives some more detail about the running daemon.
2055 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2056 matter for fast-change records such as DNSBLs.
2058 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2059 retry record, even if constant. There may be multiple transports with
2060 different interface settings and the retry behaviour needs to be kept
2063 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2065 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2067 JH/10 Bug 840: fix log_defer_output option of pipe transport
2069 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2070 hosts_randomize. This matters a lot when combined with mua_wrapper.
2072 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2073 ${quote_pgsql:<string>} operator.
2075 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2077 JH/14 Change header file name for freeradius-client. Relevant if compiling
2078 with Radius support; from the Gentoo tree and checked under Fedora.
2080 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2082 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2083 option transport_filter, meaning no filtering.
2085 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2087 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2088 defaults to "*" (all hosts). The variable is now available when not built
2089 with TLS, default unset, mainly to enable keeping the testsuite sane.
2090 If a server certificate is not supplied (via tls_certificate) an error is
2091 logged, and clients will find TLS connections fail on startup. Presumably
2092 they will retry in-clear.
2093 Packagers of Exim are strongly encouraged to create a server certificate
2094 at installation time.
2096 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2097 with the $config_file variable.
2099 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2100 in transport context, after the attempt, and per-recipient. The latter type
2101 is per host attempted. The event data is the error message, and the errno
2102 information encodes the lookup type (A vs. MX) used for the (first) host,
2103 and the trailing two digits of the smtp 4xx response.
2105 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2106 to write to mainlog (or rejectlog, paniclog) in the window between file
2107 creation and permissions/ownership being changed. Particularly affects
2108 installations where exicyclog is run as root, rather than exim user;
2109 result is that the running daemon panics and dies.
2111 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2113 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2114 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2115 "pri" and "weight". Note that the previous implicit priority given by the
2116 list order is no longer honoured.
2118 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2119 for DKIM processing.
2121 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2122 by defining SUPPORT_SOCKS.
2124 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2125 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2126 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2127 variables are renamed to proxy_{local,external}_{address,port}.
2129 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2130 for a build by defining SUPPORT_I18N
2132 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2133 of the query string, and make ${quote_redis:} do that quoting.
2135 JH/29 Move Events support from Experimental to mainline, enabled by default
2136 and removable for a build by defining DISABLE_EVENT.
2138 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2140 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2141 cached by the daemon.
2143 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2144 by defining LOOKUP_REDIS. The libhiredis library is required.
2146 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2147 keys are given for lookup.
2149 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2150 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2151 only supported when built with TLS support. The PolarSSL SHA routines
2152 are still used when the TLS library is too old for convenient support.
2154 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2155 openssl_options), for security. OpenSSL forces this from version 1.1.0
2156 server-side so match that on older versions.
2158 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2159 allocation for $value could be released as the expansion processing
2160 concluded, but leaving the global pointer active for it.
2162 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2163 and to use the domains and local_parts ACL conditions.
2165 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2166 incorrectly not doubled on cutthrough transmission, hence seen as a
2167 body-termination at the receiving system - resulting in truncated mails.
2168 Commonly the sender saw a TCP-level error, and retransmitted the message
2169 via the normal store-and-forward channel. This could result in duplicates
2170 received - but deduplicating mailstores were liable to retain only the
2171 initial truncated version.
2173 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2175 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2177 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2178 we're in there, support oversigning also; bug 1309.
2180 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2182 HS/04 Add support for keep_environment and add_environment options.
2184 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2185 either intentional arithmetic overflow during PRNG, or testing config-
2188 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2189 delivery resulted in actual delivery. Cancel cutthrough before DATA
2192 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2193 rejects a recipient: pass the reject to the originator.
2195 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2196 Many were false-positives and ignorable, but it's worth fixing the
2199 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2200 for the new environment-manipulation done at startup. Move the routines
2201 from being local to tls.c to being global via the os.c file.
2203 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2204 an extract embedded as result-arg for a map, the first arg for extract
2205 is unavailable so we cannot tell if this is a numbered or keyed
2206 extraction. Accept either.
2212 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2215 JH/02 The smtp transport option "multi_domain" is now expanded.
2217 JH/03 The smtp transport now requests PRDR by default, if the server offers
2220 JH/04 Certificate name checking on server certificates, when exim is a client,
2221 is now done by default. The transport option tls_verify_cert_hostnames
2222 can be used to disable this per-host. The build option
2223 EXPERIMENTAL_CERTNAMES is withdrawn.
2225 JH/05 The value of the tls_verify_certificates smtp transport and main options
2226 default to the word "system" to access the system default CA bundle.
2227 For GnuTLS, only version 3.0.20 or later.
2229 JH/06 Verification of the server certificate for a TLS connection is now tried
2230 (but not required) by default. The verification status is now logged by
2231 default, for both outbound TLS and client-certificate supplying inbound
2234 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2237 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2238 Status Notification (bounce) messages are now MIME format per RFC 3464.
2239 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2240 under the control of the dsn_advertise_hosts option, and routers may
2241 have a dsn_lasthop option.
2243 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2244 default, modifiable by a malware= option. The list separator for
2245 the options can now be changed in the usual way. Bug 68.
2247 JH/10 The smtp_receive_timeout main option is now expanded before use.
2249 JH/11 The incoming_interface log option now also enables logging of the
2250 local interface on delivery outgoing connections.
2252 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2253 if the interface and destination host and port all match.
2255 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2258 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2259 Patch from Andrew Lewis.
2261 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2262 now supports optional time-restrictions, weighting, and priority
2263 modifiers per server. Patch originally by <rommer@active.by>.
2265 JH/16 The spamd_address main option now supports a mixed list of local
2266 and remote servers. Remote servers can be IPv6 addresses, and
2267 specify a port-range.
2269 JH/17 Bug 68: The spamd_address main option now supports an optional
2270 timeout value per server.
2272 JH/18 Bug 1581: Router and transport options headers_add/remove can
2273 now have the list separator specified.
2275 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2278 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2281 JH/21 Support for the A6 type of dns record is withdrawn.
2283 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2284 rather than the verbs used.
2286 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2287 from 255 to 1024 chars.
2289 JH/24 Verification callouts now attempt to use TLS by default.
2291 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2292 are generic router options now. The defaults didn't change.
2294 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2295 Original patch from Alexander Shikoff, worked over by JH.
2297 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2298 files if ZCAT_COMMAND is not executable.
2300 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2302 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2304 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2305 Normally benign, it bites when the pair was led to by a CNAME;
2306 modern usage is to not canonicalize the domain to a CNAME target
2307 (and we were inconsistent anyway for A-only vs AAAA+A).
2309 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2311 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2312 when evaluating $sender_host_dnssec.
2314 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2315 $sender_helo_dnssec variable.
2317 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2319 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2321 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2323 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2324 documented as working, but never had. Support all but $spam_report.
2326 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2327 added for tls authenticator.
2329 HS/03 Add perl_taintmode main config option
2335 TL/01 When running the test suite, the README says that variables such as
2336 no_msglog_check are global and can be placed anywhere in a specific
2337 test's script, however it was observed that placement needed to be near
2338 the beginning for it to behave that way. Changed the runtest perl
2339 script to read through the entire script once to detect and set these
2340 variables, reset to the beginning of the script, and then run through
2341 the script parsing/test process like normal.
2343 TL/02 The BSD's have an arc4random API. One of the functions to induce
2344 adding randomness was arc4random_stir(), but it has been removed in
2345 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2346 function when detected.
2348 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2349 cause callback expansion.
2351 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2352 syntax errors in an expansion can be treated as a string instead of
2353 logging or causing an error, due to the internal use of bool_lax
2354 instead of bool when processing it.
2356 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2357 server certificates when making smtp deliveries.
2359 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2361 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2363 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2365 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2366 Merged patch from Sebastian Wiedenroth.
2368 JH/05 Fix results-pipe from transport process. Several recipients, combined
2369 with certificate use, exposed issues where response data items split
2370 over buffer boundaries were not parsed properly. This eventually
2371 resulted in duplicates being sent. This issue only became common enough
2372 to notice due to the introduction of connection certificate information,
2373 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2375 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2376 size buffer was used, resulting in syntax errors when an expansion
2379 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2380 version 3.3.6 or later.
2382 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2383 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2384 both become "event_action", the variables become $event_name, $event_data
2385 and $event_defer_errno. There is a new variable $verify_mode, usable in
2386 routers, transports and related events. The tls:cert event is now also
2387 raised for inbound connections, if the main configuration event_action
2390 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2391 early OCSP support, but no stapling (appears to be less than 1.0.0).
2393 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2394 server certificate names available under the smtp transport option
2395 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2398 JH/10 Time-related extraction expansions from certificates now use the main
2399 option "timezone" setting for output formatting, and are consistent
2400 between OpenSSL and GnuTLS compilations. Bug 1541.
2402 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2403 encoded parameter in the incoming message. Bug 1558.
2405 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2406 include certificate info, eximon was claiming there were spoolfile
2409 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2411 JH/14 Log delivery-related information more consistently, using the sequence
2412 "H=<name> [<ip>]" wherever possible.
2414 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2415 are problematic for Debian distribution, omit them from the release
2418 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2420 JH/16 Fix string representation of time values on 64bit time_t architectures.
2423 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2424 output list separator was used.
2429 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2430 checkers that were complaining about end of non-void function with no
2433 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2434 This was a regression introduced in 4.83 by another bugfix.
2436 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2438 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2439 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2445 TF/01 Correctly close the server side of TLS when forking for delivery.
2447 When a message was received over SMTP with TLS, Exim failed to clear up
2448 the incoming connection properly after forking off the child process to
2449 deliver the message. In some situations the subsequent outgoing
2450 delivery connection happened to have the same fd number as the incoming
2451 connection previously had. Exim would try to use TLS and fail, logging
2452 a "Bad file descriptor" error.
2454 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2455 utilities have not been installed.
2457 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2458 temporary space as the ACL may create new global variables.
2460 TL/01 LDAP support uses per connection or global context settings, depending
2461 upon the detected version of the libraries at build time.
2463 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2464 to extract and use the src ip:port in logging and expansions as if it
2465 were a direct connection from the outside internet. PPv2 support was
2466 updated based on HAProxy spec change in May 2014.
2468 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2470 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2471 Properly escape header and check for NULL return.
2473 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2476 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2478 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2479 characters in header names, implemented as a verify condition.
2480 Contributed by Michael Fischer v. Mollard.
2482 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2483 results permerror and temperror. Previous values are deprecated but
2484 still accepted. In a future release, err_perm and err_temp will be
2485 completely removed, which will be a backward incompatibility if the
2486 ACL tests for either of these two old results. Patch contributed by
2487 user bes-internal on the mailing list.
2489 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2491 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2492 selectors, in both main and reject logs.
2494 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2497 JH/07 Add malware type "sock" for talking to simple daemon.
2499 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2501 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2502 routers/transports under cutthrough routing.
2504 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2505 numbers. Touch up "bool" conditional to keep the same definition.
2507 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2509 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2511 JH/12 Expand items in router/transport headers_add or headers_remove lists
2512 individually rather than the list as a whole. Bug 1452.
2514 Required for reasonable handling of multiple headers_ options when
2515 they may be empty; requires that headers_remove items with embedded
2516 colons must have them doubled (or the list-separator changed).
2518 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2519 view the policy declared in the DMARC record. Currently, $dmarc_status
2520 is a combined value of both the record presence and the result of the
2523 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2525 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2526 dnslookup router and the smtp transport (applying to the forward
2529 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2530 of ldap servers used for a specific lookup. Patch provided by Heiko
2533 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2534 New variable $lookup_dnssec_authenticated for observability.
2536 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2537 Patch submitted by Lars Timman.
2539 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2541 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2542 Requires trusted mode and valid format message id, aborts otherwise.
2543 Patch contributed by Heiko Schlichting.
2545 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2546 certextract with support for various fields. Bug 1358.
2548 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2549 is requested by default, modifiable by smtp transport option
2552 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2553 operate on certificate variables to give certificate fingerprints
2554 Also new ${sha256:cert_variable}.
2556 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2558 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2559 Christian Aistleitner.
2561 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2563 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2564 file. Patch from Wolfgang Breyha.
2566 JH/25 Expand the coverage of the delivery $host and $host_address to
2567 client authenticators run in verify callout. Bug 1476.
2569 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2570 align with daemon_smtp_ports. Bug 72.
2572 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2573 support and error reporting did not work properly.
2575 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2576 and is readable. Patch from Andrew Colin Kissa.
2578 TL/14 Enhance documentation of ${run expansion and how it parses the
2579 commandline after expansion, particularly in the case when an
2580 unquoted variable expansion results in an empty value.
2582 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2584 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2585 by renaming away from it. Addresses GH issue 15, reported by
2588 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2590 TL/15 SECURITY: prevent double expansion in math comparison functions
2591 (can expand unsanitized data). Not remotely exploitable.
2598 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2600 PP/02 Make -n do something, by making it not do something.
2601 When combined with -bP, the name of an option is not output.
2603 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2606 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2607 $sender_host_name and config options to manage this, and basic check
2610 PP/05 DSCP support for outbound connections and control modifier for inbound.
2612 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2613 (Only plugin which currently uses this is kerberos4, which nobody should
2614 be using, but we should make it available and other future plugins might
2615 conceivably use it, even though it would break NAT; stuff *should* be
2616 using channel bindings instead).
2618 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2619 name; added for Sendmail compatibility; requires admin caller.
2620 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2621 just ignore it); requires trusted caller.
2622 Also parse but ignore: -Ac -Am -X<logfile>
2625 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2627 TL/02 Add +smtp_confirmation as a default logging option.
2629 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2630 Patch by Magnus Holmgren from 2007-02-20.
2632 TL/04 Bugzilla 1281 - Spec typo.
2633 Bugzilla 1283 - Spec typo.
2634 Bugzilla 1290 - Spec grammar fixes.
2636 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2638 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2640 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2641 mailing list by by Dmitry Isaikin.
2643 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2645 JH/02 Support "G" suffix to numbers in ${if comparisons.
2647 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2649 NM/01 Bugzilla 1197 - Spec typo
2650 Bugzilla 1196 - Spec examples corrections
2652 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2654 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2655 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2658 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2659 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2661 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2662 "acl {{name}{arg}...}", and optional args on acl condition
2665 JH/05 Permit multiple router/transport headers_add/remove lines.
2667 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2669 JH/07 Avoid using a waiting database for a single-message-only transport.
2670 Performance patch from Paul Fisher. Bugzilla 1262.
2672 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2675 JH/09 Add $headers_added variable, with content from use of ACL modifier
2676 add_header (but not yet added to the message). Bugzilla 199.
2678 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2679 Pulled from Bugzilla 817 by Wolfgang Breyha.
2681 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2683 (nb: this is the same fix as in Exim 4.80.1)
2685 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2688 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2691 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2693 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2694 advertise SMTP AUTH mechanism to us, instead of a generic
2695 protocol violation error. Also, make Exim more robust to bad
2696 data from the Dovecot auth socket.
2698 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2700 When a queue runner is handling a message, Exim first routes the
2701 recipient addresses, during which it prunes them based on the retry
2702 hints database. After that it attempts to deliver the message to
2703 any remaining recipients. It then updates the hints database using
2706 So if a recipient address works intermittently, it can get repeatedly
2707 deferred at routing time. The retry hints record remains fresh so the
2708 address never reaches the final cutoff time.
2710 This is a fairly common occurrence when a user is bumping up against
2711 their storage quota. Exim had some logic in its local delivery code
2712 to deal with this. However it did not apply to per-recipient defers
2713 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2715 This change adds a proper retry rule check during routing so that the
2716 final cutoff time is checked against the message's age. We only do
2717 this check if there is an address retry record and there is not a
2718 domain retry record; this implies that previous attempts to handle
2719 the address had the retry_use_local_parts option turned on. We use
2720 this as an approximation for the destination being like a local
2721 delivery, as in LMTP.
2723 I suspect this new check makes the old local delivery cutoff check
2724 redundant, but I have not verified this so I left the code in place.
2726 TF/02 Correct gecos expansion when From: is a prefix of the username.
2728 Test 0254 submits a message to Exim with the header
2732 When I ran the test suite under the user fanf2, Exim expanded
2733 the header to contain my full name, whereas it should have added
2734 a Resent-Sender: header. It erroneously treats any prefix of the
2735 username as equal to the username.
2737 This change corrects that bug.
2739 GF/01 DCC debug and logging tidyup
2740 Error conditions log to paniclog rather than rejectlog.
2741 Debug lines prefixed by "DCC: " to remove any ambiguity.
2743 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2745 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2746 Bug spotted by Jeremy Harris; was flawed since initial commit.
2747 Would have resulted in OCSP responses post-SNI triggering an Exim
2748 NULL dereference and crash.
2750 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2752 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2753 Bug detection, analysis and fix by Samuel Thibault.
2754 Bugzilla 1331, Debian bug #698092.
2756 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2758 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2759 Server implementation by Todd Lyons, client by JH.
2760 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2761 config variable "prdr_enable" controls whether the server
2762 advertises the facility. If the client requests PRDR a new
2763 acl_data_smtp_prdr ACL is called once for each recipient, after
2764 the body content is received and before the acl_smtp_data ACL.
2765 The client is controlled by both of: a hosts_try_prdr option
2766 on the smtp transport, and the server advertisement.
2767 Default client logging of deliveries and rejections involving
2768 PRDR are flagged with the string "PRDR".
2770 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2771 fclose(). Diagnosis by Todd Lyons.
2773 PP/17 Update configure.default to handle IPv6 localhost better.
2774 Patch by Alain Williams (plus minor tweaks).
2777 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2778 This is now consistent with GnuTLS, and is now documented: the
2779 previous undocumented portable approach to treating the option as
2780 unset was to force an expansion failure. That still works, and
2781 an empty string is now equivalent.
2783 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2784 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2785 not performing validation itself.
2787 PP/20 Added force_command boolean option to pipe transport.
2788 Patch from Nick Koston, of cPanel Inc.
2790 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2793 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2795 PP/21 Fix eximon continuous updating with timestamped log-files.
2796 Broken in a format-string cleanup in 4.80, missed when I repaired the
2797 other false fix of the same issue.
2798 Report and fix from Heiko Schlichting.
2801 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2802 Report from Prashanth Katuri.
2804 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2805 It's SecureTransport, so affects any MacOS clients which use the
2806 system-integrated TLS libraries, including email clients.
2808 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2809 using a MIME ACL for non-SMTP local injection.
2810 Report and assistance in diagnosis by Warren Baker.
2812 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2814 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2816 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2817 last id that failed so it may be referenced in subsequent ACL's.
2819 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2822 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2823 ldap library initialization, allowing self-signed CA's to be
2824 used. Also properly sets require_cert option later in code by
2825 using NULL (global ldap config) instead of ldap handle (per
2826 session). Bug diagnosis and testing by alxgomz.
2828 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2829 the src/util/ subdirectory.
2831 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2832 renamed to Transport Post Delivery Action by Jeremy Harris, as
2835 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2836 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2837 redis_servers = needs to be configured which will be used by the redis
2838 lookup. Patch from Warren Baker, of The Packet Hub.
2840 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2842 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2843 hostname or reverse DNS when processing a host list. Used suggestions
2844 from multiple comments on this bug.
2846 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2848 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2849 Missed a few lines, added it to make the runtest require no keyboard
2852 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2853 contains upper case chars. Make router use caseful_local_part.
2855 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2856 support when GnuTLS has been built with p11-kit.
2862 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2864 This, or similar/improved, will also be change PP/11 of 4.82.
2870 PP/01 Handle short writes when writing local log-files.
2871 In practice, only affects FreeBSD (8 onwards).
2872 Bugzilla 1053, with thanks to Dmitry Isaikin.
2874 NM/01 Bugzilla 949 - Documentation tweak
2876 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2879 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2881 PP/02 Implemented gsasl authenticator.
2883 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2885 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2886 `pkg-config foo` for cflags/libs.
2888 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2889 with rest of GSASL and with heimdal_gssapi.
2891 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2892 `pkg-config foo` for cflags/libs for the TLS implementation.
2894 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2895 properties get this fed in as external SSF. A number of robustness
2896 and debugging improvements to the cyrus_sasl authenticator.
2898 PP/08 cyrus_sasl server now expands the server_realm option.
2900 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2901 Patch by Jeremy Harris.
2903 PP/10 Added dbmjz lookup type.
2905 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2907 PP/12 MAIL args handles TAB as well as SP, for better interop with
2908 non-compliant senders.
2909 Analysis and variant patch by Todd Lyons.
2911 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2912 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2913 Patch from Dirk Mueller <dmueller@suse.com>
2915 PP/13 tls_peerdn now print-escaped for spool files.
2916 Observed some $tls_peerdn in wild which contained \n, which resulted
2917 in spool file corruption.
2919 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2920 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2921 or write after TLS renegotiation, which otherwise led to messages
2924 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2925 as a tracking header (ie: a signed header comes before the signature).
2926 Patch from Wolfgang Breyha.
2928 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2929 comma-sep list; embedded commas doubled.
2931 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2933 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2935 Report and patch from Dmitry Banschikov.
2937 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2938 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2939 failures. We appear to now support TLS1.1+ with Exim.
2941 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2942 lets Exim select keys and certificates based upon TLS SNI from client.
2943 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2944 before an outbound SMTP session. New log_selector, +tls_sni.
2946 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2947 NULL dereference. Report and patch from Alun Jones.
2949 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2950 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2951 Not seeing resolver debug output on NetBSD, but suspect this is a
2952 resolver implementation change.
2954 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2955 Left warnings. Added "eximon gdb" invocation mode.
2957 PP/21 Defaulting "accept_8bitmime" to true, not false.
2959 PP/22 Added -bw for inetd wait mode support.
2961 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2962 locate the relevant includes and libraries. Made this the default.
2964 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2965 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2967 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2968 This may cause build issues on older platforms.
2970 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2971 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2972 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2973 Added SNI support via GnuTLS too.
2974 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2976 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2978 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2979 Applied second patch from Janne, implementing suggestion to default
2980 multiple-strings-in-record handling to match SPF spec.
2982 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2984 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2985 read-only, out of scope).
2986 Patch from Wolfgang Breyha, report from Stuart Northfield.
2988 PP/29 Fix three issues highlighted by clang analyser static analysis.
2989 Only crash-plausible issue would require the Cambridge-specific
2990 iplookup router and a misconfiguration.
2991 Report from Marcin Mirosław.
2993 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2995 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2996 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2997 As part of this, removing so much warning spew let me fix some minor
2998 real issues in debug logging.
3000 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3001 assignment on my part. Fixed.
3003 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3004 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3005 Janne Snabb (who went above and beyond: thank you).
3007 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3008 string otherwise requires a connection and a bunch more work and it's
3009 relatively easy to get wrong. Should also expose TLS library linkage
3012 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3013 64-bit ${eval} (JH/03).
3015 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3016 GNU libc to support some of the 64-bit stuff, should not lead to
3017 conflicts. Defined before os.h is pulled in, so if a given platform
3018 needs to override this, it can.
3020 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3021 protection layer was required, which is not implemented.
3022 Bugzilla 1254, patch from Wolfgang Breyha.
3024 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3025 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3026 tls_dhparam take prime identifiers. Also unbreak combination of
3027 OpenSSL+DH_params+TLSSNI.
3029 PP/39 Disable SSLv2 by default in OpenSSL support.
3035 PP/01 Solaris build fix for Oracle's LDAP libraries.
3036 Bugzilla 1109, patch from Stephen Usher.
3038 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3040 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3043 TF/02 Fix a couple more cases where we did not log the error message
3044 when unlink() failed. See also change 4.74-TF/03.
3046 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3047 lock up or crash if it happened to be inside a call to libc when it
3048 got a SIGUSR1 from exiwhat.
3050 The SIGUSR1 handler appends the current process status to the process
3051 log which is later printed by exiwhat. It used to use the general
3052 purpose logging code to do this, but several functions it calls are
3053 not safe for signals.
3055 The new output code in the SIGUSR1 handler is specific to the process
3056 log, and simple enough that it's easy to inspect for signal safety.
3057 Removing some special cases also simplifies the general logging code.
3058 Removing the spurious timestamps from the process log simplifies
3061 TF/04 Improved ratelimit ACL condition.
3063 The /noupdate option has been deprecated in favour of /readonly which
3064 has clearer semantics. The /leaky, /strict, and /readonly update modes
3065 are mutually exclusive. The update mode is no longer included in the
3066 database key; it just determines when the database is updated. (This
3067 means that when you upgrade Exim will forget old rate measurements.)
3069 Exim now checks that the per_* options are used with an update mode that
3070 makes sense for the current ACL. For example, when Exim is processing a
3071 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3072 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3073 must specify per_mail/readonly. If you omit the update mode it defaults to
3074 /leaky where that makes sense (as before) or /readonly where required.
3076 The /noupdate option is now undocumented but still supported for
3077 backwards compatibility. It is equivalent to /readonly except that in
3078 ACLs where /readonly is required you may specify /leaky/noupdate or
3079 /strict/noupdate which are treated the same as /readonly.
3081 A useful new feature is the /count= option. This is a generalization
3082 of the per_byte option, so that you can measure the throughput of other
3083 aggregate values. For example, the per_byte option is now equivalent
3084 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3086 The per_rcpt option has been generalized using the /count= mechanism
3087 (though it's more complicated than the per_byte equivalence). When it is
3088 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3089 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3090 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3091 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3092 Note that using per_rcpt with a non-readonly update mode in more than
3093 one ACL will cause the recipients to be double-counted. (The per_mail
3094 and per_byte options don't have this problem.)
3096 The handling of very low rates has changed slightly. If the computed rate
3097 is less than the event's count (usually one) then this event is the first
3098 after a long gap. In this case the rate is set to the same as this event's
3099 count, so that the first message of a spam run is counted properly.
3101 The major new feature is a mechanism for counting the rate of unique
3102 events. The new per_addr option counts the number of different
3103 recipients that someone has sent messages to in the last time period. It
3104 behaves like per_rcpt if all the recipient addresses are different, but
3105 duplicate recipient addresses do not increase the measured rate. Like
3106 the /count= option this is a general mechanism, so the per_addr option
3107 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3108 example, measure the rate that a client uses different sender addresses
3109 with the options per_mail/unique=$sender_address. There are further
3110 details in the main documentation.
3112 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3114 TF/06 Removed a few PCRE remnants.
3116 TF/07 Automatically extract Exim's version number from tags in the git
3117 repository when doing development or release builds.
3119 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3120 Bugzilla 879. Patch from Paul Fisher.
3122 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3123 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3126 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3128 PP/05 Variable $av_failed, true if the AV scanner deferred.
3129 Bugzilla 1078. Patch from John Horne.
3131 PP/06 Stop make process more reliably on build failure.
3132 Bugzilla 1087. Patch from Heiko Schlittermann.
3134 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3135 Bugzilla 1089. Patch from Heiko Schlittermann.
3137 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3138 Bugzilla 1131. Patch from Holger Weiß.
3140 PP/09 Handle IPv6 addresses with SPF.
3141 Bugzilla 860. Patch from Wolfgang Breyha.
3143 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3145 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3148 PP/11 match_* no longer expand right-hand-side by default.
3149 New compile-time build option, EXPAND_LISTMATCH_RHS.
3150 New expansion conditions, "inlist", "inlisti".
3152 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3154 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3156 PP/14 fix log_write() format string regression from TF/03.
3157 Bugzilla 1152. Patch from Dmitry Isaikin.
3163 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3165 PP/02 Harmonised TLS library version reporting; only show if debugging.
3166 Layout now matches that introduced for other libraries in 4.74 PP/03.
3168 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3170 PP/04 New "dns_use_edns0" global option.
3172 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3175 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3176 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3178 TK/01 Updated PolarSSL code to 0.14.2.
3179 Bugzilla 1097. Patch from Andreas Metzler.
3181 PP/07 Catch divide-by-zero in ${eval:...}.
3182 Fixes bugzilla 1102.
3184 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3187 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3188 format-string attack -- SECURITY: remote arbitrary code execution.
3190 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3191 time unintentionally subject to list matching rules, letting the header
3192 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3193 arbitrary string expansion). This allowed for information disclosure.
3195 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3196 INT_MIN/-1 -- value coerced to INT_MAX.
3202 NM/01 Workaround for PCRE version dependency in version reporting
3205 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3206 This fixes portability to compilers other than gcc, notably
3207 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3209 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3210 makefiles for portability to HP-UX and POSIX correctness.
3212 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3213 Also via indented variable definition in the Makefile.
3214 (Debugging by Oliver Heesakkers).
3216 PP/02 Restore caching of spamd results with expanded spamd_address.
3217 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3219 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3220 Improves build reliability. Fix from: Frank Elsner
3222 NM/02 Fix wide character breakage in the rfc2047 coding
3223 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3225 NM/03 Allow underscore in dnslist lookups
3226 Fixes bug 1026. Patch from Graeme Fowler
3228 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3229 Code patches from Adam Ciarcinski of NetBSD.
3231 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3234 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3235 is logged, to avoid truncation. Patch from John Horne.
3237 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3238 Patch from Jakob Hirsch.
3240 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3241 SQL string expansion failure details.
3242 Patch from Andrey Oktyabrski.
3244 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3245 Patch from Simon Arlott.
3247 PP/09 New lookups functionality failed to compile on old gcc which rejects
3248 extern declarations in function scope.
3249 Patch from Oliver Fleischmann
3251 PP/10 Use sig_atomic_t for flags set from signal handlers.
3252 Check getgroups() return and improve debugging.
3253 Fixed developed for diagnosis in bug 927 (which turned out to be
3256 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3257 Patch from Mark Zealey.
3259 PP/12 Bugzilla 1056: Improved spamd server selection.
3260 Patch from Mark Zealey.
3262 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3263 Based on patch from Heiko Schlittermann.
3265 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3266 Patch from Uwe Doering, sign-off by Michael Haardt.
3268 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3269 variable declaration deep within a block. Bug and patch from
3272 PP/15 lookups-Makefile IRIX compatibility coercion.
3274 PP/16 Make DISABLE_DKIM build knob functional.
3276 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3277 Patch by Simon Arlott
3279 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3280 variable argument macros. Our copy now differs from upstream.
3286 TF/01 Failure to get a lock on a hints database can have serious
3287 consequences so log it to the panic log.
3289 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3290 controlled using the smtp_confirmation log selector.
3292 TF/03 Include the error message when we fail to unlink a spool file.
3294 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3295 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3296 for maintaining out-of-tree patches for some time.
3298 PP/01 Bugzilla 139: Documentation and portability issues.
3299 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3300 Handle per-OS dynamic-module compilation flags.
3302 PP/02 Let /dev/null have normal permissions.
3303 The 4.73 fixes were a little too stringent and complained about the
3304 permissions on /dev/null. Exempt it from some checks.
3305 Reported by Andreas M. Kirchwitz.
3307 PP/03 Report version information for many libraries, including
3308 Exim version information for dynamically loaded libraries. Created
3309 version.h, now support a version extension string for distributors
3310 who patch heavily. Dynamic module ABI change.
3312 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3313 privilege escalation vulnerability whereby the Exim run-time user
3314 can cause root to append content of the attacker's choosing to
3317 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3320 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3321 If dropping privileges for untrusted macros, we disabled normal logging
3322 on the basis that it would fail; for the Exim run-time user, this is not
3323 the case, and it resulted in successful deliveries going unlogged.
3324 Fixed. Reported by Andreas Metzler.
3330 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3331 only prepend for the Resent-* case. Fixes regression introduced in
3332 Exim 4.70 by NM/22 for Bugzilla 607.
3334 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3335 increasing numbers of administrators be bitten by this.
3337 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3339 PP/03 Bugzilla 994: added openssl_options main configuration option.
3341 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3343 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3345 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3347 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3348 without a peer certificate, leading to a segfault because of an
3349 assumption that peers always have certificates. Be a little more
3350 paranoid. Problem reported by Martin Tscholak.
3352 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3353 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3354 NB: ClamAV planning to remove STREAM in "middle of 2010".
3355 CL also introduces -bmalware, various -d+acl logging additions and
3356 more caution in buffer sizes.
3358 PP/09 Implemented reverse_ip expansion operator.
3360 PP/10 Bugzilla 937: provide a "debug" ACL control.
3362 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3364 PP/12 Bugzilla 973: Implement --version.
3366 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3368 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3370 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3372 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3373 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3374 ignore trailing whitespace.
3376 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3378 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3381 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3382 Notification from Dr Andrew Aitchison.
3384 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3385 ExtendedDetectionInfo response format.
3386 Notification from John Horne.
3388 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3391 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3392 XSL and documented dependency on system catalogs, with examples of how
3395 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3398 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3399 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3400 configuration file which is writeable by the Exim user or group.
3402 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3403 of configuration files to cover files specified with the -C option if
3404 they are going to be used with root privileges, not just the default
3407 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3408 option (effectively making it always true).
3410 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3411 files to be used while preserving root privileges.
3413 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3414 that rogue child processes cannot use them.
3416 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3417 run-time user, instead of root.
3419 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3420 Exim run-time user without dropping privileges.
3422 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3423 result string, instead of calling string_vformat() twice with the same
3426 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3427 for other users. Others should always drop root privileges if they use
3428 -C on the command line, even for a whitelisted configure file.
3430 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3432 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3438 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3439 $data_path, and $header_path variables; fixed documentation bugs and
3442 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3443 exipick to access non-standard spools, including the "frozen" queue
3446 NM/01 Bugzilla 965: Support mysql stored procedures.
3447 Patch from Alain Williams
3449 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3451 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3452 Patch from Andreas Metzler
3454 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3455 Patch from Kirill Miazine
3457 NM/05 Bugzilla 671: Added umask to procmail example.
3459 JJ/03 installed exipick 20100323.0, fixing doc bug
3461 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3462 directory. Notification and patch from Dan Rosenberg.
3464 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3466 TK/02 Improve log output when DKIM signing operation fails.
3468 MH/01 Treat the transport option dkim_domain as a colon separated
3469 list, not as a single string, and sign the message with each element,
3470 omitting multiple occurences of the same signer.
3472 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3473 Bugzilla 985, 986. Patch by Simon Arlott
3475 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3476 Patch by Simon Arlott
3478 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3479 MBX locking. Notification from Dan Rosenberg.
3485 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3487 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3489 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3491 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3493 NM/04 Bugzilla 915: Flag broken perl installation during build.
3499 TK/01 Added patch by Johannes Berg that expands the main option
3500 "spamd_address" if it starts with a dollar sign.
3502 TK/02 Write list of recipients to X-Envelope-Sender header when building
3503 the mbox-format spool file for content scanning (suggested by Jakob
3506 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3507 (http://www.dcc-servers.net/) support via dccifd. Activated by
3508 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3510 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3511 by Mark Daniel Reidel <mr@df.eu>.
3513 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3514 When building exim an external PCRE library is now needed -
3515 PCRE is a system library on the majority of modern systems.
3516 See entry on PCRE_LIBS in EDITME file.
3518 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3519 conversation. Added nologin parameter to request.
3520 Patch contributed by Kirill Miazine.
3522 TF/01 Do not log submission mode rewrites if they do not change the address.
3524 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3526 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3527 log files in place. Contributed by Roberto Lima.
3529 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3531 TF/03 Bugzilla 615: When checking the local_parts router precondition
3532 after a local_part_suffix or local_part_prefix option, Exim now
3533 does not use the address's named list lookup cache, since this
3534 contains cached lookups for the whole local part.
3536 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3537 Robert Millan. Documentation is in experimental-spec.txt.
3539 TF/04 Bugzilla 668: Fix parallel build (make -j).
3541 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3543 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3544 Patch provided by Jan Srzednicki.
3546 TF/05 Leading white space used to be stripped from $spam_report which
3547 wrecked the formatting. Now it is preserved.
3549 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3550 that they are available at delivery time.
3552 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3554 TF/08 TLS error reporting now respects the incoming_interface and
3555 incoming_port log selectors.
3557 TF/09 Produce a more useful error message if an SMTP transport's hosts
3558 setting expands to an empty string.
3560 NM/06 Bugzilla 744: EXPN did not work under TLS.
3561 Patch provided by Phil Pennock.
3563 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3564 Patch provided by Richard Godbee.
3566 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3567 acl_smtp_notquit, added index entry.
3569 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3570 Patch provided by Eugene Bujak.
3572 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3573 accept(). Patch provided by Maxim Dounin.
3575 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3576 Patch provided by Phil Pennock.
3578 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3580 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3581 Patch provided by Brad "anomie" Jorsch.
3583 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3584 Patch provided by Dean Brooks.
3586 TK/05 Add native DKIM support (does not depend on external libraries).
3588 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3589 Patch provided by Graeme Fowler.
3591 NM/16 Bugzilla 851: Documentation example syntax fix.
3593 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3595 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3598 NM/19 Bugzilla 745: TLS version reporting.
3599 Patch provided by Phil Pennock.
3601 NM/20 Bugzilla 167: bool: condition support.
3602 Patch provided by Phil Pennock.
3604 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3605 clients. Patch provided by Phil Pennock.
3607 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3608 Patch provided by Brad "anomie" Jorsch.
3610 NM/23 Bugzilla 687: Fix misparses in eximstats.
3611 Patch provided by Heiko Schlittermann.
3613 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3614 Patch provided by Heiko Schlittermann.
3616 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3617 plus update to original patch.
3619 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3621 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3622 Patch provided by David Brownlee.
3624 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3626 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3628 NM/30 Bugzilla 888: TLS documentation bugfixes.
3630 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3632 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3633 Unlike the original bugzilla I have changed all shell scripts in src tree.
3635 NM/33 Bugzilla 898: Transport filter timeout fix.
3636 Patch by Todd Rinaldo.
3638 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3639 Patch by Serge Demonchaux.
3641 NM/35 Bugzilla 39: Base64 decode bug fixes.
3642 Patch by Jakob Hirsch.
3644 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3646 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3648 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3650 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3656 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3657 ALT-N's libdkim that I have put here:
3658 http://duncanthrax.net/exim-experimental/
3660 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3661 were called 'true' and it seems that C99 defines that as a reserved
3662 keyword to be used with 'bool' variable types. That means you could
3663 not include C99-style headers which use bools without triggering
3664 build errors in sieve.c.
3666 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3667 as mailq or other aliases. Changed the --help handling significantly
3668 to do whats expected. exim_usage() emits usage/help information.
3670 SC/01 Added the -bylocaldomain option to eximstats.
3672 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3674 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3676 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3682 PH/01 Another patch from the Sieve maintainer.
3684 PH/02 When an IPv6 address is converted to a string for single-key lookup
3685 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3686 dots are used instead of colons so that keys in lsearch files need not
3687 contain colons. This was done some time before quoting was made available
3688 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3689 (notated using the quote facility) so as to distinguish them from IPv4
3690 keys. This meant that lookups for IP addresses in host lists did not work
3691 for iplsearch lookups.
3693 This has been fixed by arranging for IPv6 addresses to be expressed with
3694 colons if the lookup type is iplsearch. This is not incompatible, because
3695 previously such lookups could never work.
3697 The situation is now rather anomalous, since one *can* have colons in
3698 ordinary lsearch keys. However, making the change in all cases is
3699 incompatible and would probably break a number of configurations.
3701 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3704 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3705 conversion specification without a maximum field width, thereby enabling
3706 a rogue spamd server to cause a buffer overflow. While nobody in their
3707 right mind would setup Exim to query an untrusted spamd server, an
3708 attacker that gains access to a server running spamd could potentially
3709 exploit this vulnerability to run arbitrary code as the Exim user.
3711 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3712 $primary_hostname instead of what libspf2 thinks the hosts name is.
3714 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3715 a directory entry by the name of the lookup key. Previously, if a
3716 symlink pointed to a non-existing file or a file in a directory that
3717 Exim lacked permissions to read, a lookup for a key matching that
3718 symlink would fail. Now it is enough that a matching directory entry
3719 exists, symlink or not. (Bugzilla 503.)
3721 PH/03 The body_linecount and body_zerocount variables are now exported in the
3724 PH/04 Added the $dnslist_matched variable.
3726 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3727 This means they are set thereafter only if the connection becomes
3730 PH/06 Added the client_condition to authenticators so that some can be skipped
3731 by clients under certain conditions.
3733 PH/07 The error message for a badly-placed control=no_multiline_responses left
3734 "_responses" off the end of the name.
3736 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3738 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3739 (without spaces) instead of just copying the configuration text.
3741 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3743 PH/11 Added $max_received_linelength.
3745 PH/12 Added +ignore_defer and +include_defer to host lists.
3747 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3748 way in which PCRE > 7.0 is built.
3750 PH/14 Implemented queue_only_load_latch.
3752 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3753 MAIL command. The effect was to mangle the value on 64-bit systems.
3755 PH/16 Another patch from the Sieve maintainer.
3757 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3759 PH/18 If a system quota error occurred while trying to create the file for
3760 a maildir delivery, the message "Mailbox is full" was not appended to the
3761 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3762 only to a quota excession during the actual writing of the file.
3764 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3765 characters?) which causes problems in log lines. The DN values are now
3766 passed through string_printing() before being added to log lines.
3768 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3769 and InterBase are left for another time.)
3771 PH/21 Added message_body_newlines option.
3773 PH/22 Guard against possible overflow in moan_check_errorcopy().
3775 PH/23 POSIX allows open() to be a macro; guard against that.
3777 PH/24 If the recipient of an error message contained an @ in the local part
3778 (suitably quoted, of course), incorrect values were put in $domain and
3779 $local_part during the evaluation of errors_copy.
3785 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3786 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3789 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3790 issue a MAIL command.
3792 PH/02 In an ACL statement such as
3794 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3796 if a client was not listed at all, or was listed with a value other than
3797 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3798 the condition was not true (as it should be), so access was not denied.
3799 The bug was that the ! inversion was incorrectly passed on to the second
3800 item. This has been fixed.
3802 PH/03 Added additional dnslists conditions == and =& which are different from
3803 = and & when the dns lookup returns more than one IP address.
3805 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3806 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3808 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3809 FSYNC, which compiles an option called disable_fsync that allows for
3810 bypassing fsync(). The documentation is heavily laced with warnings.
3812 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3814 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3815 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3816 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3817 including adding "make clean"; (3) Added -fPIC when compiling the test
3818 dynamically loaded module, to get rid of a warning.
3820 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3821 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3822 = 0s. The bug is otherwise harmless.
3824 PH/07 There was a bug in the dovecot authenticator such that the value of
3825 $auth1 could be overwritten, and so not correctly preserved, after a
3826 successful authentication. This usually meant that the value preserved by
3827 the server_setid option was incorrect.
3829 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3831 PH/09 Installed PCRE release 7.0.
3833 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3834 run for batched SMTP input. It is now run at the start of every message
3835 in the batch. While fixing this I discovered that the process information
3836 (output by running exiwhat) was not always getting set for -bs and -bS
3837 input. This is fixed, and it now also says "batched" for BSMTP.
3839 PH/11 Added control=no_pipelining.
3841 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3842 patch, slightly modified), and move the expansion of helo_data till after
3843 the connection is made in the smtp transport (so it can use these
3846 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3848 PH/14 Added log_selector = +pid.
3850 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3852 PH/16 Add ${if forany and ${if forall.
3854 PH/17 Added dsn_from option to vary the From: line in DSNs.
3856 PH/18 Flush SMTP output before performing a callout, unless control =
3857 no_callout_flush is set.
3859 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3860 was true (the default) a successful delivery failed to delete the retry
3861 item, thus causing premature timeout of the address. The bug is now
3864 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3866 PH/21 Long custom messages for fakedefer and fakereject are now split up
3867 into multiline responses in the same way that messages for "deny" and
3868 other ACL rejections are.
3870 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3871 with slight modification.
3873 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3874 draft, changing the syntax and factoring some duplicate code".
3876 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3877 for deliveries of the second and subsequent messages over the same SMTP
3880 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3881 ${reduce, with only minor "tidies".
3883 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3885 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3886 expansion side effects.
3888 PH/27 When a message times out after an over-quota error from an Exim-imposed
3889 quota, the bounce message says "mailbox is full". This message was not
3890 being given when it was a system quota that was exceeded. It now should
3893 MH/03 Made $recipients available in local_scan(). local_scan() already has
3894 better access to the recipient list through recipients_list[], but
3895 $recipients can be useful in postmaster-provided expansion strings.
3897 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3898 in the case of a MAIL command with additional options following the
3899 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3900 were accidentally chopped off.
3902 PH/29 SMTP synchronization checks are implemented when a command is read -
3903 there is a check that no more input is waiting when there shouldn't be
3904 any. However, for some commands, a delay in an ACL can mean that it is
3905 some time before the response is written. In this time, more input might
3906 arrive, invalidly. So now there are extra checks after an ACL has run for
3907 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3908 pipelining has not been advertised.
3910 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3912 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3913 returned in the SMTP response when smtp_return_error_details was false.
3914 This has been fixed.
3916 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3917 instead of the C I/O that was originally supplied, because problems were
3918 reported on Solaris.
3920 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3921 Exim which did not show up earlier: it was assuming that a call to
3922 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3923 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3924 was a macro that became an assignment, so it seemed to work. This has
3925 changed to a proper function call with a void return, hence the compile
3926 error. Exim's code has been fixed.
3928 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3931 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3933 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3935 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3936 because it turns out to be too big or there is a timeout) there is no
3937 "Completed" line in the log. When some messages of this type were
3938 selected by exigrep, they were listed as "not completed". Others were
3939 picked up by some special patterns. I have improved the selection
3940 criteria to be more general.
3942 PH/38 The host_find_failed option in the manualroute router can now be set
3943 to "ignore", to completely ignore a host whose IP address cannot be
3944 found. If all hosts are ignored, the behaviour is controlled by the new
3945 host_all_ignored option.
3947 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3948 homing or because of multiple MX records with /mx) generated more than
3949 one IP address, and the following item turned out to be the local host,
3950 all the secondary addresses of the first item were incorrectly removed
3951 from the list, along with the local host and any following hosts (which
3952 is what is supposed to happen).
3954 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3955 whoever called Exim into the -H file. In the case of the daemon it was
3956 behaving confusingly. When first started, it used values for whoever
3957 started the daemon, but after a SIGHUP it used the Exim user (because it
3958 calls itself on a restart). I have changed the code so that it now always
3961 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3962 message are rejected with the same error (e.g. no authentication or bad
3963 sender address), and a DATA command is nevertheless sent (as can happen
3964 with PIPELINING or a stupid MUA), the error message that was given to the
3965 RCPT commands is included in the rejection of the DATA command. This is
3966 intended to be helpful for MUAs that show only the final error to their
3969 PH/42 Another patch from the Sieve maintainer.
3971 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3972 Eximstats - Fixed some broken HTML links and added missing column headers
3974 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3975 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3977 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3979 PH/43 Yet another patch from the Sieve maintainer.
3981 PH/44 I found a way to check for a TCP/IP connection going away before sending
3982 the response to the final '.' that terminates a message, but only in the
3983 case where the client has not sent further data following the '.'
3984 (unfortunately, this is allowed). However, in many cases there won't be
3985 any further data because there won't be any more messages to send. A call
3986 to select() can be used: if it shows that the input is "ready", there is
3987 either input waiting, or the socket has been closed. An attempt to read
3988 the next input character can distinguish the two cases. Previously, Exim
3989 would have sent an OK response which the client would never have see.
3990 This could lead to message repetition. This fix should cure that, at
3991 least in a lot of common cases.
3993 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3994 advertised in response to EHLO.
4000 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4001 fixed by 4.65/MH/01 (is this a record?) are fixed:
4003 (i) An empty string was always treated as zero by the numeric comparison
4004 operators. This behaviour has been restored.
4006 (ii) It is documented that the numeric comparison operators always treat
4007 their arguments as decimal numbers. This was broken in that numbers
4008 starting with 0 were being interpreted as octal.
4010 While fixing these problems I realized that there was another issue that
4011 hadn't been noticed. Values of message_size_limit (both the global option
4012 and the transport option) were treated as octal if they started with 0.
4013 The documentation was vague. These values are now always treated as
4014 decimal, and I will make that clear in the documentation.
4020 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4021 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4024 MH/01 Don't check that the operands of numeric comparison operators are
4025 integers when their expansion is in "skipping" mode (fixes bug
4026 introduced by 4.64-PH/07).
4028 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4029 child addresses, Exim now panics and dies. Previously, because the count
4030 is held in a short int, deliveries were likely to be lost. As such a
4031 large number of recipients for a single message is ridiculous
4032 (performance will be very, very poor), I have chosen to impose a limit
4033 rather than extend the field.
4039 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4040 leftover -K file (the existence of which was triggered by #402).
4041 While we were at it, introduced process PID as part of the -K
4042 filename. This should rule out race conditions when creating
4045 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4046 processing considerably. Previous code took too long for large mails,
4047 triggering a timeout which in turn triggers #401.
4049 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4050 in the DK code in transports.c. sendfile() is not really portable,
4051 hence the _LINUX specificness.
4053 TF/01 In the add_headers option to the mail command in an Exim filter,
4054 there was a bug that Exim would claim a syntax error in any
4055 header after the first one which had an odd number of characters
4058 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4059 callout verification, Exim cached a "reject" for the entire domain. This
4060 is correct for most verifications, but it is not correct for a recipient
4061 verification with use_sender or use_postmaster set, because in that case
4062 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4063 case of MAIL FROM:<> rejection from other early rejections (e.g.
4064 rejection of HELO). When verifying a recipient using a non-null MAIL
4065 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4066 Whatever the result of the callout, the value of the domain cache is
4067 left unchanged (for any other kind of callout, getting as far as trying
4068 RCPT means that the domain itself is ok).
4070 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4073 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4074 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4075 session, the daemon ignores ECONNECT errors and logs others; it now
4076 ignores EPIPE as well.
4078 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4079 (quoted-printable decoding).
4081 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4082 later the small subsequent patch to fix an introduced bug.
4084 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4086 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4088 PH/08 An error is now given if message_size_limit is specified negative.
4090 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4091 to be given (somewhat) arbitrary names.
4093 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4096 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4097 miscellaneous code fixes
4099 PH/10 Added the log_reject_target ACL modifier to specify where to log
4102 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4103 hostname. This is wrong, because it relates to the incoming message (and
4104 probably the interface on which it is arriving) and not to the outgoing
4105 callout (which could be using a different interface). This has been
4106 changed to use the value of the helo_data option from the smtp transport
4107 instead - this is what is used when a message is actually being sent. If
4108 there is no remote transport (possible with a router that sets up host
4109 addresses), $smtp_active_hostname is used.
4111 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4112 tweaks were necessary in order to get it to work (see also 21 below):
4113 (a) The code assumed that strncpy() returns a negative number on buffer
4114 overflow, which isn't the case. Replaced with Exim's string_format()
4116 (b) There were several signed/unsigned issues. I just did the minimum
4117 hacking in of casts. There is scope for a larger refactoring.
4118 (c) The code used strcasecmp() which is not a standard C function.
4119 Replaced with Exim's strcmpic() function.
4120 (d) The code set only $1; it now sets $auth1 as well.
4121 (e) A simple test gave the error "authentication client didn't specify
4122 service in request". It would seem that Dovecot has changed its
4123 interface. Fortunately there's a specification; I followed it and
4124 changed what the client sends and it appears to be working now.
4126 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4129 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4130 address A is aliased to B and C, where B exists and C does not. Without
4131 -v the output is "A verified" because verification stops after a
4132 successful redirection if more than one address is generated. However,
4133 with -v the child addresses are also verified. Exim was outputting "A
4134 failed to verify" and then showing the successful verification for C,
4135 with its parentage. It now outputs "B failed to verify", showing B's
4136 parentage before showing the successful verification of C.
4138 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4139 look up a TXT record in a specific list after matching in a combined
4142 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4143 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4144 they consult the DNS. I had assumed they would set it the way they
4145 wanted; and indeed my experiments on Linux seem to show that in some
4146 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4147 To be on the safe side, however, I have now made the interface to
4148 host_find_byname() similar to host_find_bydns(), with an argument
4149 containing the DNS resolver options. The host_find_byname() function now
4150 sets these options at its start, just as host_find_bydns() does. The smtp
4151 transport options dns_qualify_single and dns_search_parents are passed to
4152 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4153 of host_find_byname() use the default settings of RES_DEFNAMES
4154 (qualify_single) but not RES_DNSRCH (search_parents).
4156 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4157 spool_read_header() do less string testing, by means of a preliminary
4158 switch on the second character of optional "-foo" lines. (This is
4159 overdue, caused by the large number of possibilities that now exist.
4160 Originally there were few.) While I was there, I also converted the
4161 str(n)cmp tests so they don't re-test the leading "-" and the first
4162 character, in the hope this might squeeze out yet more improvement.
4164 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4165 flag allowing group syntax was set by the header_syntax check but not
4166 turned off, possible causing trouble later; (2) The flag was not being
4167 set at all for the header_verify test, causing "group"-style headers to
4168 be rejected. I have now set it in this case, and also caused header_
4169 verify to ignore an empty address taken from a group. While doing this, I
4170 came across some other cases where the code for allowing group syntax
4171 while scanning a header line wasn't quite right (mostly, not resetting
4172 the flag correctly in the right place). These bugs could have caused
4173 trouble for malformed header lines. I hope it is now all correct.
4175 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4176 with the "reply" argument non-NULL. The code, however (which originally
4177 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4178 but it didn't always do it. This confused somebody who was copying the
4179 code for some other use. I have removed all the tests.
4181 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4182 feature that was used to support insecure browsers during the U.S. crypto
4183 embargo. It requires special client support, and Exim is probably the
4184 only MTA that supported it -- and would never use it because real RSA is
4185 always available. This code has been removed, because it had the bad
4186 effect of slowing Exim down by computing (never used) parameters for the
4187 RSA_EXPORT functionality.
4189 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4190 authenticator to fail if there's a tab character in the incoming data
4191 (there should never be unless someone is messing about, as it's supposed
4192 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4193 if the connection is using TLS or if the remote IP is the same as the
4194 local IP, and the "valid-client-cert option" if a client certificate has
4197 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4198 authenticators. This can be used for authorization after authentication
4199 succeeds. (In the case of plaintext, it servers for both authentication
4202 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4203 if any retry times were supplied.
4205 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4206 connection, where there is no client IP address to check. In this
4207 situation, the verify now always succeeds.
4209 PH/25 Applied John Jetmore's -Mset patch.
4211 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4213 PH/27 In a string expansion for a processed (not raw) header when multiple
4214 headers of the same name were present, leading whitespace was being
4215 removed from all of them, but trailing whitespace was being removed only
4216 from the last one. Now trailing whitespace is removed from each header
4217 before concatenation. Completely empty headers in a concatenation (as
4218 before) are ignored.
4220 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4221 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4223 PH/29 [Removed. This was a change that I later backed out, and forgot to
4224 correct the ChangeLog entry (that I had efficiently created) before
4225 committing the later change.]
4227 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4228 address errors (4xx response to RCPT) over the same connection as other
4229 messages routed to the same hosts. Such deliveries are always "forced",
4230 so retry times are not inspected. This resulted in far too many retries
4231 for the affected addresses. The effect occurred only when there were more
4232 hosts than the hosts_max_try setting in the smtp transport when it had
4233 the 4xx errors. Those hosts that it had tried were not added to the list
4234 of hosts for which the message was waiting, so if all were tried, there
4235 was no problem. Two fixes have been applied:
4237 (i) If there are any address or message errors in an SMTP delivery, none
4238 of the hosts (tried or untried) are now added to the list of hosts
4239 for which the message is waiting, so the message should not be a
4240 candidate for sending over the same connection that was used for a
4241 successful delivery of some other message. This seems entirely
4242 reasonable: after all the message is NOT "waiting for some host".
4243 This is so "obvious" that I'm not sure why it wasn't done
4244 previously. Hope I haven't missed anything, but it can't do any
4245 harm, as the worst effect is to miss an optimization.
4247 (ii) If, despite (i), such a delivery is accidentally attempted, the
4248 routing retry time is respected, so at least it doesn't keep
4249 hammering the server.
4251 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4252 in ${readsocket because some servers need this prod.
4254 PH/32 Added some extra debug output when updating a wait-xxx database.
4256 PH/33 The hint "could be header name not terminated by colon", which has been
4257 given for certain expansion errors for a long time, was not being given
4258 for the ${if def:h_colon_omitted{... case.
4260 PH/34 The spec says: "With one important exception, whenever a domain list is
4261 being scanned, $domain contains the subject domain." There was at least
4262 one case where this was not true.
4264 PH/35 The error "getsockname() failed: connection reset by peer" was being
4265 written to the panic log as well as the main log, but it isn't really
4266 panic-worthy as it just means the connection died rather early on. I have
4267 removed the panic log writing for the ECONNRESET error when getsockname()
4270 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4271 runs only) independently of the message's sender address. This meant
4272 that, if the 4xx error was in fact related to the sender, a different
4273 message to the same recipient with a different sender could confuse
4274 things. In particular, this can happen when sending to a greylisting
4275 server, but other circumstances could also provoke similar problems.
4276 I have changed the default so that the retry time for these errors is now
4277 based a combination of the sender and recipient addresses. This change
4278 can be overridden by setting address_retry_include_sender=false in the
4281 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4282 remote server are returned as part of bounce messages. This was not
4283 happening for LMTP over a pipe (the lmtp transport), but now it is the
4284 same for both kinds of LMTP.
4286 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4287 in header lines that were in fact CNAMEs. This is no longer the case.
4289 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4290 and queue runs started by the daemon processed all messages. This has
4291 been fixed so that -R and -S can now usefully be given with -q<time>.
4293 PH/40 Import PCRE release 6.7 (fixes some bugs).
4295 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4297 PH/42 Give an error if -q is specified more than once.
4299 PH/43 Renamed the variables $interface_address and $interface_port as
4300 $received_ip_address and $received_port, to make it clear that these
4301 values apply to message reception, and not to the outgoing interface when
4302 a message is delivered. (The old names remain recognized, of course.)
4304 PH/44 There was no timeout on the connect() call when using a Unix domain
4305 socket in the ${readsocket expansion. There now is.
4307 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4308 be meaningful with "accept".
4310 SC/01 Eximstats V1.43
4311 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4313 SC/02 Eximstats V1.44
4314 Use a glob alias rather than an array ref in the generated
4315 parser. This improves both readability and performance.
4317 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4318 Collect SpamAssassin and rejection statistics.
4319 Don't display local sender or destination tables unless
4320 there is data to show.
4321 Added average volumes into the top table text output.
4323 SC/04 Eximstats V1.46
4324 Collect data on the number of addresses (recipients)
4325 as well as the number of messages.
4327 SC/05 Eximstats V1.47
4328 Added 'Message too big' to the list of mail rejection
4329 reasons (thanks to Marco Gaiarin).
4331 SC/06 Eximstats V1.48
4332 Mainlog lines which have GMT offsets and are too short to
4333 have a flag are now skipped.
4335 SC/07 Eximstats V1.49 (Alain Williams)
4336 Added the -emptyok flag.
4338 SC/08 Eximstats V1.50
4339 Fixes for obtaining the IP address from reject messages.
4341 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4342 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4343 whitespace changes from 4.64-PH/27
4345 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4348 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4349 are found, allow negative numbers in numeric criteria)
4351 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4353 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4354 to match changes made in 4.64-PH/43
4356 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4358 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4359 "domain" is actually an IP address, and force a failure. This locks out
4360 those revolvers/nameservers that support "A-for-A" lookups, in
4361 contravention of the specifications.
4363 PH/48 When a host name was looked up from an IP address, and the subsequent
4364 forward lookup of the name timed out, the host name was left in
4365 $sender_host_name, contrary to the specification.
4367 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4368 restricted to single-key lookups, Exim was not diagnosing an error if
4369 * or *@ was used with a query-style lookup.
4371 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4373 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4374 long ago, but noone interested enough thought of it. Let's just say that
4375 the "1.1" means that there are some new functions that weren't there at
4376 some point in the past.
4378 PH/51 Error processing for expansion failure of helo_data from an smtp
4379 transport during callout processing was broken.
4381 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4382 tested/used via the -bh/-bhc/-bs options.
4384 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4385 bug, fixed in subsequent PCRE releases).
4387 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4388 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4390 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4396 SC/01 Use a glob alias rather than an array ref in eximstats generated
4397 parser. This improves both readability and performance.
4399 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4400 Don't display local sender or destination tables in eximstats unless
4401 there is data to show.
4402 Added average volumes into the eximstats top table text output.
4404 SC/03 Collect data on the number of addresses (recipients) as well
4405 as the number of messages in eximstats.
4407 TF/01 Correct an error in the documentation for the redirect router. Exim
4408 does (usually) call initgroups() when daemonizing.
4410 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4411 with consistent privilege compared to when running as a daemon.
4413 TF/03 Note in the spec that $authenticated_id is not set for local
4414 submissions from trusted users.
4416 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4417 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4419 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4420 by adding some example configuration directives to the default
4421 configuration file. A little bit of work is required to uncomment the
4422 directives and define how usernames and passwords are checked, but
4423 there is now a framework to start from.
4425 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4426 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4427 without this. I don't know how relevant this is to other LDAP libraries.
4429 PH/02 Add the verb name to the "unknown ACL verb" error.
4431 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4433 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4435 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4436 directory not expanded when it should be if an expanded home directory
4437 was set for the address (which is overridden by the transport).
4439 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4442 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4443 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4444 because it is too late at that time, and has no effect.
4446 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4447 security issue with \' (bugzilla #107). I could not use the
4448 PQescapeStringConn() function, because it needs a PGconn value as one of
4451 PH/08 When testing addresses using -bt, indicate those final addresses that
4452 are duplicates that would not cause an additional delivery. At least one
4453 person was confused, thinking that -bt output corresponded to deliveries.
4454 (Suppressing duplicates isn't a good idea as you lose the information
4455 about possibly different redirections that led to the duplicates.)
4457 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4458 systems where poll() doesn't work, in particular OS X.
4460 PH/10 Added more information to debugging output for retry time not reached.
4462 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4463 operations in malware.c.
4465 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4468 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4469 syslog_duplication set false, log lines that would normally be written
4470 both the the main log and to the reject log were not written to syslog at
4473 PH/14 In the default configuration, change the use of "message" in ACL warn
4474 statements to "add_header".
4476 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4477 not followed by a command (e.g. "seen endif").
4479 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4480 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4483 PH/17 Added extra conditions to the default value of delay_warning_condition
4487 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4488 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4489 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4492 The Auto-Submitted: and various List- headers are standardised, whereas I
4493 don't think Precedence: ever was.
4495 PH/18 Refactored debugging code in route_finduser() to show more information,
4496 in particular, the error code if getpwnam() issues one.
4498 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4499 This is apparently needed in addition to the PH/07 change above to avoid
4500 any possible encoding problems.
4502 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4503 but not after initializing Perl.
4505 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4506 output them only if debugging. By default they are written stderr,
4507 apparently, which is not desirable.
4509 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4512 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4515 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4517 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4518 authenticated or an ident call has been made. Suppress the default
4519 values for $authenticated_id and $authenticated_sender (but permit -oMai
4520 and -oMas) when testing with -bh.
4522 PH/24 Re-jigged the order of the tests in the default configuration so that the
4523 tests for valid domains and recipients precede the DNS black list and CSA
4524 tests, on the grounds that those ones are more expensive.
4526 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4527 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4528 This bug exists in every version of Exim that I still have, right back to
4531 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4532 However, an attempt to turn on case-sensitivity in a regex key by
4533 including (?-i) didn't work because the subject string was already
4534 lowercased, and the effects were non-intuitive. It turns out that a
4535 one-line patch can be used to allow (?-i) to work as expected.
4541 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4542 other effects) broke the use of negated acl sub-conditions.
4544 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4547 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4548 "Deny" causes Exim to reject the incoming connection with a 554 error.
4549 Unfortunately, if there is a major crisis, such as a disk failure,
4550 tcp-wrappers gives "deny", whereas what one would like would be some
4551 kind of temporary error. A kludge has been added to help with this.
4552 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4553 554 error is used if errno is still zero or contains ENOENT (which occurs
4554 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4557 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4559 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4560 errors. Otherwise a message that provokes a temporary error (when other
4561 messages do not) can cause a whole host to time out.
4563 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4564 addresses were routed directly to files or pipes from a redirect router.
4565 File deliveries just didn't batch; pipe deliveries might have suffered
4568 PH/06 A failure to get a lock for a hints database would erroneously always say
4569 "Failed to get write lock", even when it was really a read lock.
4571 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4572 of 0600. This has been changed to use the value of the lockfile_mode
4573 option (which defaults to 0600).
4575 PH/08 Applied small patch from the Sieve maintainer.
4577 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4578 folder from quota calculations, a direct delivery into this folder messed
4579 up the contents of the maildirsize file. This was because the regex was
4580 used only to exclude .Trash (or whatever) when the size of the mailbox
4581 was calculated. There was no check that a delivery was happening into an
4582 excluded directory. This bug has been fixed by ignoring all quota
4583 processing for deliveries into excluded directories.
4585 PH/10 Added the maildirfolder_create_regex option to appendfile.
4591 PH/01 The code for finding all the local interface addresses on a FreeBSD
4592 system running IPv6 was broken. This may well have applied to all BSD
4593 systems, as well as to others that have similar system calls. The broken
4594 code found IPv4 interfaces correctly, but gave incorrect values for the
4595 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4596 that it would not match correctly against @[] and not recognize the IPv6
4599 PH/02 The ipliteral router was not recognizing addresses of the form user@
4600 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4602 PH/03 Added disable_ipv6.
4604 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4605 decoded form, because it is most often used to construct To: headers
4606 lines in autoreplies, and the decoded form may well be syntactically
4607 invalid. However, $reply_address has leading white space removed, and all
4608 newlines turned into spaces so that the autoreply transport does not
4611 PH/05 If group was specified without a user on a router, and no group or user
4612 was specified on a transport, the group from the router was ignored.
4614 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4615 for visible compile-time settings that can be used to change these
4616 numbers, for those that want even more. Backwards compatibility with old
4617 spool files has been maintained. However, going back to a previous Exim
4618 release will lost any variables that are in spool files.
4620 PH/07 Two small changes when running in the test harness: increase delay when
4621 passing a TCP/IP connection to a new process, in case the original
4622 process has to generate a bounce, and remove special handling of
4623 127.0.0.2 (sic), which is no longer necessary.
4625 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4626 be the same on different OS.
4628 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4631 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4632 whether --show-vars was specified or not
4634 JJ/02 exipick: Added support for new ACL variable spool format introduced
4637 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4638 syntactically invalid From: or Reply-to: line, and a filter used this to
4639 generate an autoreply, and therefore failed to obtain an address for the
4640 autoreply, Exim could try to deliver to a non-existent relative file
4641 name, causing unrelated and misleading errors. What now happens is that
4642 it logs this as a hard delivery error, but does not attempt to create a
4645 PH/11 The exinext utility has a -C option for testing purposes, but although
4646 the given file was scanned by exinext itself; it wasn't being passed on
4647 when Exim was called.
4649 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4650 an end-of-file indication when reading a command response.
4652 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4653 compiled. In many other places in Exim, IPv6 addresses are always
4654 recognized, so I have changed this. It also means that IPv4 domain
4655 literals of the form [IPV4:n.n.n.n] are now always recognized.
4657 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4658 used if the router is not running as root, for example, when verifying at
4659 ACL time, or when using -bh. The debugging output from this situation was
4660 non-existent - all you got was a failure to exec. I have made two
4663 (a) Failures to set uid/gid, the current directory, or a process leader
4664 in a subprocess such as that created by queryprogram now generate
4665 suitable debugging output when -d is set.
4667 (b) The queryprogram router detects when it is not running as root,
4668 outputs suitable debugging information if -d is set, and then runs
4669 the subprocess without attempting to change uid/gid.
4671 PH/15 Minor change to Makefile for building test_host (undocumented testing
4674 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4675 additional section of a DNS packet that returns MX or SRV records.
4676 Instead, it always explicitly searches for A/AAAA records. This avoids
4677 major problems that occur when a DNS server includes only records of one
4678 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4679 fixed another bug: if SRV records were looked up and the corresponding
4680 address records were *not* found in the additional section, the port
4681 values from the SRV records were lost.
4683 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4684 using the correct key (the original address) when searching the retry
4685 rules in order to find which one to use for generating the retry hint.
4687 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4688 adding the default one. Similarly, if it contains a Reply-To: header, the
4689 errors_reply_to option, if set, is not used.
4691 PH/19 When calculating a retry time, Exim used to measure the "time since
4692 failure" by looking at the "first failed" field in the retry record. Now
4693 it does not use this if it is later than than the arrival time of the
4694 message. Instead it uses the arrival time. This makes for better
4695 behaviour in cases where some deliveries succeed, thus re-setting the
4696 "first failed" field. An example is a quota failure for a huge message
4697 when small messages continue to be delivered. Without this change, the
4698 "time since failure" will always be short, possible causing more frequent
4699 delivery attempts for the huge message than are intended.
4700 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4702 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4703 $1, $2, $3) because the numerical variables can be reset during some
4704 expansion items (e.g. "match"), thereby losing the authentication data.
4706 PH/21 Make -bV show the size of off_t variables so that the test suite can
4707 decide whether to run tests for quotas > 2G.
4709 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4710 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4711 filecount value is greater than 2G or if a quota value is greater than 2G
4712 on a system where the size of off_t is not greater than 4, a panic error
4715 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4716 never match. The debug and -bh output now contains an explicit error
4717 message indicating a malformed IPv4 address or mask.
4719 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4720 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4721 PH/23 above applies.
4723 PH/25 Do not write to syslog when running in the test harness. The only
4724 occasion when this arises is a failure to open the main or panic logs
4725 (for which there is an explicit test).
4727 PH/26 Added the /no_tell option to "control=freeze".
4729 PH/27 If a host name lookup failed very early in a connection, for example, if
4730 the IP address matched host_lookup and the reverse lookup yielded a name
4731 that did not have a forward lookup, an error message of the form "no IP
4732 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4733 could be logged. Now it outputs the IP address instead of "NULL".
4735 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4736 allows the sender and the authenticated sender to be set when
4737 submitting a message from within Exim. Since child_open_exim() is
4738 documented for local_scan(), the new function should be too.
4740 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4741 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4742 results in an empty string is now treated as unset.
4744 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4746 PH/31 Added sender_verify_fail logging option.
4748 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4749 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4750 tidied the source and removed it altogether.
4752 PH/33 When a queue run was abandoned because the load average was too high, a
4753 log line was always written; now it is written only if the queue_run log
4754 selector is set. In addition, the log line for abandonment now contains
4755 information about the queue run such as the pid. This is always present
4756 in "start" and "stop" lines but was omitted from the "abandon" line.
4758 PH/34 Omit spaces between a header name and the colon in the error message that
4759 is given when verify = headers_syntax fails (if there are lots of them,
4760 the message gets confusing).
4762 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4763 names, as there are now some PTR records that contain slashes. This check
4764 is only to protect against broken name servers that fall over on strange
4765 characters, so the fact that it applies to all lookups doesn't matter.
4767 PH/36 Now that the new test suite is complete, we can remove some of the
4768 special code in Exim that was needed for the old test suite. For example,
4769 sorting DNS records because real resolvers return them in an arbitrary
4770 order. The new test suite's fake resolver always returns records in the
4773 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4774 bounces) except when queue_only is set, to avoid logging races between
4775 the different processes.
4777 PH/38 Panic-die if .include specifies a non-absolute path.
4779 PH/39 A tweak to the "H" retry rule from its user.
4781 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4782 a label. They prevented compilation on older perls.
4784 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4785 a warning to be raised on newish perls.
4787 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4788 on queue. Changes to match documented behaviour of showing count of
4789 messages matching specified criteria.
4791 PH/40 Changed the default ident timeout from 30s to 5s.
4793 PH/41 Added support for the use of login_cap features, on those BSD systems
4794 that have them, for controlling the resources used by pipe deliveries.
4796 PH/42 The content-scanning code uses fopen() to create files in which to put
4797 message data. Previously it was not paying any attention to the mode of
4798 the files. Exim runs with umask(0) because the rest of the code creates
4799 files with open(), and sets the required mode explicitly. Thus, these
4800 files were ending up world-writeable. This was not a big issue, because,
4801 being within the spool directory, they were not world-accessible. I have
4802 created a function called modefopen, which takes an additional mode
4803 argument. It sets umask(777), creates the file, chmods it to the required
4804 mode, then resets the umask. All the relevant calls to fopen() in the
4805 content scanning code have been changed to use this function.
4807 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4808 to 24 hours. This avoids potential overflow problems when processing G
4809 and H retry rules. I suspect nobody ever tinkers with this value.
4811 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4813 PH/45 When the plaintext authenticator is running as a client, the server's
4814 challenges are checked to ensure they are valid base64 strings. By
4815 default, the authentication attempt is cancelled if an invalid string is
4816 received. Setting client_ignore_invalid_base64 true ignores these errors.
4817 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4818 they are received. Thus, the responses can be made to depend on the
4819 challenges. If an invalid string is ignored, an empty string is placed in
4822 PH/46 Messages that are created by the autoreply transport now contains a
4823 References: header, in accordance with RFCs 2822 and 3834.
4825 PH/47 Added authenticated_sender_force to the smtp transport.
4827 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4829 PH/49 Installed latest patch from the Sieve maintainer.
4831 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4832 was also set, the appendfile transport was unnecessarily scanning a
4833 directory of message files (e.g. for maildir delivery) to find the count
4834 of files (along with the size), even though it did not need this
4835 information. It now does the scan only if it needs to find either the
4836 size of the count of files.
4838 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4840 PH/52 Two bugs concerned with error handling when the smtp transport is
4843 (i) Exim was not creating retry information for temporary errors given
4844 for individual recipients after the DATA command when the smtp transport
4845 was used in LMTP mode. This meant that they could be retried too
4846 frequently, and not timed out correctly.
4848 (ii) Exim was setting the flag that allows error details to be returned
4849 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4850 recipients that were returned after the DATA command.
4852 PH/53 This is related to PH/52, but is more general: for any failing address,
4853 when detailed error information was permitted to be returned to the
4854 sender, but the error was temporary, then after the final timeout, only
4855 "retry timeout exceeded" was returned. Now it returns the full error as
4856 well as "retry timeout exceeded".
4858 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4859 do this, and (what is worse) MTAs that accept it.
4861 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4862 will now be deprecated.
4864 PH/56 New os.c-cygwin from the Cygwin maintainer.
4866 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4867 formats (previously only available in exim formats via -bpr, -bpru,
4868 and -bpra. Now also available in native and exiqgrep formats)
4870 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4871 with very large, slow to parse queues
4873 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4875 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4877 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4878 responses to authentication challenges, though it was showing the
4879 challenges; (ii) I've removed the CR characters from the debug output for
4882 PH/58 Allow for the insertion of a newline as well as a space when a string
4883 is turned into more than one encoded-word during RFC 2047 encoding. The
4884 Sieve code now uses this.
4886 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4887 data_4xx, lost_connection, tls_required.
4889 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4890 message was being sent as an SMTP response.
4892 PH/61 Add -l and -k options to exicyclog.
4894 PH/62 When verifying, if an address was redirected to one new address, so that
4895 verification continued, and the new address failed or deferred after
4896 having set something in $address_data, the value of $address_data was not
4897 passed back to the ACL. This was different to the case when no
4898 redirection occurred. The value is now passed back in both cases.
4900 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4901 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4902 use login_cap.h, so on its own it isn't the distinguishing feature. The
4903 new name refers directly to the setclassresources() function.
4905 PH/65 Added configuration files for NetBSD3.
4907 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4909 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4910 is preferred over IPv4.
4912 PH/68 The bounce_return_message and bounce_return_body options were not being
4913 honoured for bounces generated during the reception of non-SMTP messages.
4914 In particular, this applied to messages rejected by the ACL. This bug has
4915 been fixed. However, if bounce_return_message is true and bounce_return_
4916 body is false, the headers that are returned for a non-SMTP message
4917 include only those that have been read before the error was detected.
4918 (In the case of an ACL rejection, they have all been read.)
4920 PH/69 The HTML version of the specification is now built in a directory called
4921 spec_html instead of spec.html, because the latter looks like a path with
4922 a MIME-type, and this confuses some software.
4924 PH/70 Catch two compiler warnings in sieve.c.
4926 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4927 function verify_get_ident() calls ip_connect() to connect a socket, but
4928 if the "connect()" function timed out, ip_connect() used to close the
4929 socket. However, verify_get_ident() also closes the socket later, and in
4930 between Exim writes to the log, which may get opened at this point. When
4931 the socket was closed in ip_connect(), the log could get the same file
4932 descriptor number as the socket. This naturally causes chaos. The fix is
4933 not to close the socket in ip_connect(); the socket should be closed by
4934 the function that creates it. There was only one place in the code where
4935 this was missing, in the iplookup router, which I don't think anybody now
4936 uses, but I've fixed it anyway.
4938 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4939 well as to direct DNS lookups. Otherwise the handling of names in host
4940 lists is inconsistent and therefore confusing.
4946 PH/01 Two changes to the default runtime configuration:
4948 (1) Move the checks for relay_from_hosts and authenticated clients from
4949 after to before the (commented out) DNS black list checks.
4951 (2) Add control=submission to the relay_from_hosts and authenticated
4952 clients checks, on the grounds that messages accepted by these
4953 statements are most likely to be submissions.
4955 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4957 (1) Generate an error if the third argument for the ${prvs expansion is
4960 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4963 (3) Reset the variables that are obtained from the first argument of
4964 ${prvscheck and used in the second argument before leaving the code,
4965 because their memory is reclaimed, so using them afterwards may do
4968 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4969 one (it's much easier than Tom thought :-).
4971 (5) Because of (4), we can now allow for the use of $prvscheck_result
4972 inside the third argument.
4974 PH/03 For some reason, the default setting of PATH when running a command from
4975 a pipe transport was just "/usr/bin". I have changed it to
4978 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4979 anything to be listed in the output from -bV.
4981 PH/05 When a filter generated an autoreply, the entire To: header line was
4982 quoted in the delivery log line, like this:
4984 => >A.N.Other <ano@some.domain> <original@ddress> ...
4986 This has been changed so that it extracts the operative address. There
4987 may be more than one such address. If so, they are comma-separated, like
4990 => >ano@some.domain,ona@other.domain <original@ddress> ...
4992 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4993 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4994 not being looked up in the rDNS to get a host name, Exim was showing the
4995 IP address twice in Received: lines, even though the IP addresses were
4996 identical. For example:
4998 Received: from [1.2.3.4] (helo=[1.2.3.4])
5000 However, if the real host name was known, it was omitting the HELO data
5001 if it matched the actual IP address. This has been tidied up so that it
5002 doesn't show the same IP address twice.
5004 PH/07 When both +timestamp and +memory debugging was on, the value given by
5005 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5006 called by the debug printing, thereby overwriting the timestamp buffer.
5007 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5009 PH/08 When the original message was included in an autoreply transport, it
5010 always said "this is a copy of the message, including all the headers",
5011 even if body_only or headers_only was set. It now gives an appropriate
5014 PH/09 Applied a patch from the Sieve maintainer which:
5016 o fixes some comments
5017 o adds the (disabled) notify extension core
5018 o adds some debug output for the result of if/elsif tests
5019 o points to the current vacation draft in the documentation
5020 and documents the missing references header update
5024 o fixes a bug in processing the envelope test (when testing
5025 multiple envelope elements, the last element determined the
5028 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5029 Electronic Mail") by including:
5031 Auto-submitted: auto-generated
5033 in the messages that it generates (bounce messages and others, such as
5034 warnings). In the case of bounce messages for non-SMTP messages, there was
5035 also a typo: it was using "Auto_submitted" (underscore instead of
5036 hyphen). Since every message generated by Exim is necessarily in response
5037 to another message, thes have all been changed to:
5039 Auto-Submitted: auto-replied
5041 in accordance with these statements in the RFC:
5043 The auto-replied keyword:
5045 - SHOULD be used on messages sent in direct response to another
5046 message by an automatic process,
5048 - MUST NOT be used on manually-generated messages,
5050 - MAY be used on Delivery Status Notifications (DSNs) and Message
5051 Disposition Notifications (MDNs),
5053 - MUST NOT be used on messages generated by automatic or periodic
5054 processes, except for messages which are automatic responses to
5057 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5058 to the default Received: header definition.
5060 PH/12 Added log selector acl_warn_skipped (default on).
5062 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5063 variables because (a) they are in the wrong storage pool and (b) even if
5064 they were copied, it wouldn't work properly because of the caching.
5066 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5067 checking when decoding. Apparently there are clients that generate
5068 overlong encoded strings. Why am I not surprised?
5070 PH/15 If the first argument of "${if match_address" was not empty, but did not
5071 contain an "@" character, Exim crashed. Now it writes a panic log message
5072 and treats the condition as false.
5074 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5076 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5077 extension "envelope-auth". The code is finished and in agreement with
5078 other implementations, but there is no documentation so far and in fact,
5079 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5080 not changing the active code.
5082 Print executed "if" and "elsif" statements when debugging is used. This
5083 helps a great deal to understand what a filter does.
5085 Document more things not specified clearly in RFC3028. I had all this
5086 sorted out, when out of a sudden new issues came to my mind. Oops."
5088 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5091 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5092 canonical form (as documented). However, after a host name lookup from
5093 the IP address, check_host() was doing a simple string comparison with
5094 addresses acquired from the DNS when checking that the found name did
5095 have the original IP as one of its addresses. Since any found IPv6
5096 addresses are likely to be in abbreviated form, the comparison could
5097 fail. Luckily, there already exists a function for doing the comparison
5098 by converting both addresses to binary, so now that is used instead of
5099 the text comparison.
5101 PH/20 There was another similar case to PH/19, when a complete host name was
5102 given in a host list; looking up its IP address could give an abbreviated
5103 form, whereas the current host's name might or might not be abbreviated.
5104 The same fix has been applied.
5110 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5111 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5114 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5115 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5117 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5119 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5120 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5121 Also, for "Auto-Submitted", treat anything other than "no" as
5122 non-personal, in accordance with RFC 3834. (Previously it treated
5123 anything starting "auto-" as non-personal.)
5125 TF/01 The control=submission/name=... option had a problem with syntax
5126 errors if the name included a slash character. The /name= option
5127 now slurps the rest of the string, so it can include any characters
5128 but it must come last in the list of options (after /sender_retain
5131 PH/05 Some modifications to the interface to the fake nameserver for the new
5139 TK/01 Added the "success_on_redirect" address verification option. See
5140 NewStuff for rationale and an example.
5142 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5144 PH/02 Patch to exigrep to allow it to work on syslog lines.
5146 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5147 fread() to skip over the body file's header line, because in Cygwin the
5148 header line is locked and is inaccessible.
5150 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5151 co-exist for some time) to make it clear that it is the Exim ID that is
5152 referenced, not the Message-ID: header line.
5154 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5155 string_format() function, because snprintf() does not exist on all
5158 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5159 ${stat: expansion item.
5161 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5162 protocol synchronization error", to keep the pedants happy.
5164 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5165 well as for IRIX systems, when gcc is being used. See the host.c source
5168 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5170 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5173 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5174 transport and to the smtp transport in LMTP mode.
5176 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5178 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5179 run a filter in a subprocess. This could lead to confusion in subsequent
5180 lookups in the parent process. There should also be a search_tidyup() at
5181 the end of the subprocess.
5183 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5184 only if the host matched helo_try_verify_hosts, which caused the
5185 verification to occur when the EHLO/HELO command was issued. The ACL just
5186 tested the remembered result. Now, if a previous verification attempt has
5187 not happened, "verify = helo" does it there and then.
5189 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5191 TK/03 Fix log output including CR from clamd.
5193 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5194 exist provoked a memory error which could cause a segfault.
5196 PH/15 Installed PCRE 6.2
5198 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5200 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5201 of the problem. Specifically, suggested +O2 rather than +O1 for the
5204 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5206 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5207 record, the port was not correctly logged when the outgoing_port log
5208 selector was set (it logged the transort's default port).
5210 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5211 fallback_hosts, and "hosts" in the smtp transport.
5213 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5214 host errors such as "Connection refused".
5216 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5217 authentication with radiusclient 0.4.9:
5219 - Error returned from rc_read_config was caught wrongly
5220 - Username/password not passed on to radius server due to wrong length.
5222 The presumption is that some radiusclient API changes for 4.51/PH/17
5223 were not taken care of correctly. The code is still untested by me (my
5224 Linux distribution still has 0.3.2 of radiusclient), but it was
5225 contributed by a Radius user.
5227 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5228 expanding the "port" option of the smtp transport.
5230 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5231 while reading a MIME header. Thanks to Tom Hughes for a patch.
5233 PH/24 Include config.h inside local_scan.h so that configuration settings are
5236 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5237 that in an ACL for RCPT (for example), you can examine exactly what was
5240 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5241 commands, but it was not correctly comparing the address with the actual
5242 client host address. Thus, it would show the EHLO address in Received:
5243 header lines when this was not necessary.
5245 PH/27 Added the % operator to ${eval:}.
5247 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5248 it should be ignoring failures (because with -C, for example, it has lost
5249 privilege). It wasn't ignoring creation failures other than "already
5252 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5255 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5256 because an input line was too long, either on its own, or by virtue of
5257 too many continuations, the temporary file was not being removed, and the
5258 return code was incorrect.
5260 PH/31 Missing "BOOL" in function definition in filtertest.c.
5262 PH/32 Applied Sieve patches from the maintainer.
5264 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5266 PH/33 Added "verify = not_blind".
5268 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5269 Local/Makefile (with some defaults set). These are used in built scripts
5270 such as exicyclog, but they have never been used in the exim_install
5271 script (though there are many overriding facilities there). I have
5272 arranged that the exim_install script now takes note of these two
5275 PH/35 Installed configuration files for Dragonfly.
5277 PH/36 When a locally submitted message by a trusted user did not contain a
5278 From: header, and the sender address was obtained from -f or from an SMTP
5279 MAIL command, and the trusted user did not use -F to supply a sender
5280 name, $originator_name was incorrectly used when constructing a From:
5281 header. Furthermore, $originator_name was used for submission mode
5282 messages from external hosts without From: headers in a similar way,
5283 which is clearly wrong.
5285 PH/37 Added control=suppress_local_fixups.
5287 PH/38 When log_selector = +received_sender was set, and the addition of the
5288 sender made the log line's construction buffer exactly full, or one byte
5289 less than full, an overflow happened when the terminating "\n" was
5292 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5293 when the result of a list match is failure because a DNS lookup failed.
5295 PH/40 RM_COMMAND is now used in the building process.
5297 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5298 the "build-* directories that it finds.
5300 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5301 address in a domain literal was a prefix of an interface address.
5303 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5304 when verifying a sender address, unless rewrite_headers is false.
5306 PH/44 Wrote a long comment about why errors_to addresses are verified as
5307 recipients, not senders.
5309 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5310 the ratelimit ACL was added.
5312 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5314 PH/46 Added extra information about PostgreSQL errors to the error string.
5316 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5317 avoiding the need to install special zones in a real server. This is
5318 backwards compatible; if it can't find the fake resolver, it drops back.
5319 Thus, both old and new test suites can be run.
5321 TF/02 Added util/ratelimit.pl
5323 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5324 clock is set back in time.
5326 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5327 Candler <B.Candler@pobox.com>.
5329 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5330 OK for addresses that are the result of redirections.
5332 PH/48 A number of further additions for the benefit of the new test suite,
5333 including a fake gethostbyname() that interfaces to the fake DNS resolver
5336 TF/06 The fix for widen_domains has also been applied to qualify_single and
5337 search_parents which are the other dnslookup options that can cause
5340 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5343 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5345 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5346 service" if it encountered an MX record with an empty target hostname.
5347 The message is now "an MX or SRV record indicated no SMTP service".
5349 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5350 if the DNS of the sending site is misconfigured. This is quite a
5351 common situation. This change restores the behaviour of treating a
5352 helo verification defer as a failure.
5354 PH/51 If self=fail was set on a router, the bounce message did not include the
5355 actual error message.
5361 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5363 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5364 command itself ended in error, the underlying message about the transport
5365 filter timeout was being overwritten with the pipe command error. Now the
5366 underlying error message should be appended to the second error message.
5368 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5370 PH/02 Reduce the amount of output that "make" produces by default. Full output
5371 can still be requested.
5373 PH/03 The warning log line about a condition test deferring for a "warn" verb
5374 was being output only once per connection, rather than after each
5375 occurrence (because it was using the same function as for successful
5376 "warn" verbs). This seems wrong, so I have changed it.
5378 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5379 it should not have, which might have caused a crash in the right
5380 circumstances, but probably never did.
5382 PH/04 Installed a modified version of Tony Finch's patch to make submission
5383 mode fix the return path as well as the Sender: header line, and to
5384 add a /name= option so that you can make the user's friendly name appear
5387 TF/03 Added the control = fakedefer ACL modifier.
5389 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5390 Mark Lowes for thorough testing.
5392 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5394 TK/03 Merged latest SRS patch from Miles Wilton.
5396 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5397 with the definition in sysexits.h (which is #included earlier).
5398 Fortunately, Exim does not actually use EX_OK. The code used to try to
5399 preserve the sysexits.h value, by assuming that macro definitions were
5400 scanned for macro replacements. I have been disabused of this notion,
5401 so now the code just undefines EX_OK before #including unistd.h.
5403 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5404 in the smtp transport. When a block could not be written in a single
5405 write() function, the timeout was being re-applied to each part-write.
5406 This seems wrong - if the receiver was accepting one byte at a time it
5407 would take for ever. The timeout is now adjusted when this happens. It
5408 doesn't have to be particularly precise.
5410 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5411 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5413 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5414 without a domain if the check to <postmaster@domain> fails.
5416 SC/01 Eximstats: added -xls and the ability to specify output files
5417 (patch written by Frank Heydlauf).
5419 SC/02 Eximstats: use FileHandles for outputting results.
5421 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5423 SC/04 Eximstats: fixed display of large numbers with -nvr option
5425 SC/05 Eximstats: fixed merging of reports with empty tables.
5427 SC/06 Eximstats: added the -include_original_destination flag
5429 SC/07 Eximstats: removed tabs and trailing whitespace.
5431 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5433 TK/06 MBOX spool code: Add real "From " MBOX separator line
5434 so the .eml file is really in mbox format (even though
5435 most programs do not really care). Patch from Alex Miller.
5437 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5438 The latter is generated from $received_to and is only set if the
5439 message has one envelope recipient. SA can use these headers,
5440 obviously out-of-the-box. Patch from Alex Miller.
5442 PH/08 The ${def test on a variable was returning false if the variable's
5443 value was "0", contrary to what the specification has always said!
5444 The result should be true unless the variable is empty.
5446 PH/09 The syntax error of a character other than { following "${if
5447 def:variable_name" (after optional whitespace) was not being diagnosed.
5448 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5449 accidental colon was present, for example, could give incorrect results.
5451 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5452 result is used (not including appendfile, where other changes are about
5455 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5456 This involved changing a lot of size variables from int to off_t. It
5457 should work with maildirs and everything.
5459 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5460 spamd dying while we are connected to it.
5462 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5465 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5466 function for BDB 4.3.
5468 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5470 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5471 the sources for PCRE have been re-arranged and more files are now
5474 PH/15 The code I had for printing potentially long long variables in PH/11
5475 above was not the best (it lost precision). The length of off_t variables
5476 is now inspected at build time, and an appropriate printing format (%ld
5477 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5478 to be "long long int" or "long int". This is needed for the internal
5479 formatting function string_vformat().
5481 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5482 the configuration file to be ":syslog", then the script "guesses" where
5483 the logs files are, rather than using the compiled in default. In our
5484 case the guess is not the same as the compiled default, so the script
5485 suddenly stopped working when I started to use syslog. The patch checks
5486 to see if log_file_path is "". If so, it attempts to read it from exim
5487 with no configuration file to get the compiled in version, before it
5488 falls back to the previous guessing code."
5490 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5491 implementing BATV in an Exim configuration. See NewStuff for the gory
5494 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5495 Makefile that are specific to HP-UX.
5497 PH/18 If the "use_postmaster" option was set for a recipient callout together
5498 with the "random" option, the postmaster address was used as the MAIL
5499 FROM address for the random test, but not for the subsequent recipient
5500 test. It is now used for both.
5502 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5503 patch removes a few documentation additions to RFC 3028, because the
5504 latest draft now contains them. It adds the new en;ascii-case comparator
5505 and a new error check for 8bit text in MIME parts. Comparator and
5506 require names are now matched exactly. I enabled the subaddress
5507 extension, but it is not well tested yet (read: it works for me)."
5509 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5510 rework some of the code of TK/09 above to avoid the hardwired use of
5511 "%lld" and "long long". Replaced the call to snprintf() with a call to
5514 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5515 records point to non-existent hosts", "retry timeout exceeded", and
5516 "retry time not reached for any host after a long failure period".
5518 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5519 experimental DomainKeys support:
5521 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5522 (2) On an error such as an illegally used "control", the wrong name for
5523 the control was given.
5525 These problems did NOT occur unless DomainKeys support was compiled.
5527 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5529 PH/24 Added ${if match_ip condition.
5531 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5532 databases so that it will be absolutely obvious if a crash occurs in the
5533 DB library. This is a regular occurrence (often caused by mis-matched
5536 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5537 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5538 picked up on a user's system that detects such things. There doesn't seem
5539 to be a gcc warning option for this - only an attribute that has to be
5540 put on the function's prototype. It seems that in Fedora Core 4 they have
5541 set this on a number of new functions. No doubt there will be more in due
5544 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5545 specify a transport. However, if an address that was verified by such a
5546 router was the subject of a callout, Exim crashed because it tried to
5547 read the rcpt_include_affixes from the non-existent transport. Now it
5548 just assumes that the setting of that option is false. This bug was
5549 introduced by 4.51/PH/31.
5551 PH/28 Changed -d+all to exclude +memory, because that information is very
5552 rarely of interest, but it makes the output a lot bigger. People tend to
5553 do -d+all out of habit.
5555 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5556 code in os-type was giving problems when libc.so lives in lib64, like on
5559 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5560 aren't the modern standard, and it seems that some systems' include files
5561 don't always have them. Exim was already checking for some of the newer
5562 ones like T_AAAA, and defining it itself. I've added checks for all the
5563 record types that Exim uses.
5565 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5566 not automatically generating a new one, as it is supposed to. This
5567 prevented TLS from working. If the file did exist, but contained invalid
5568 data, a new version was generated, as expected. It was only the case of a
5569 non-existent file that was broken.
5571 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5572 with a change in libdomainkeys > 0.64.
5574 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5575 from DNS. If the selector record carries the flag, it now has
5576 precedence over the domain-wide flag.
5578 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5580 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5581 the use of a port name that isn't defined in /etc/services) occurred, the
5582 message was deferred as in a normal delivery, and thus remained on the
5583 spool, instead of being failed because of the mua_wrapper setting. This
5584 is now fixed, and I tidied up some of the mua_wrapper messages at the
5587 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5588 the messages in a hash of arrays rather than using individual hashes.
5589 This is a bit cleaner and results in dramatic memory savings, albeit
5590 at a slight CPU cost.
5592 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5593 as requested by Marc Sherman.
5595 SC/10 Eximstats: added histograms for user specified patterns as requested
5598 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5600 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5601 fopen() in the content-scanning modules that did not already have it.
5607 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5608 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5610 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5612 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5614 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5615 to test Sieve filters that use "vacation".
5617 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5618 that changes the way the GnuTLS parameters are stored in the cache file.
5619 The new format can be generated externally. For backward compatibility,
5620 if the data in the cache doesn't make sense, Exim assumes it has read an
5621 old-format file, and it generates new data and writes a new file. This
5622 means that you can't go back to an older release without removing the
5625 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5626 work if there are any delivery delays because "one_time" forces the
5627 parent to be marked "delivered", so its unseen clone is never tried
5628 again. For this reason, Exim now forbids the simultaneous setting of
5631 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5632 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5633 entry if you want to know the details. The fix, however, neglected to
5634 consider the case when local delivery batching is involved. The test for
5635 "previously delivered" was not happening when checking to see if an
5636 address could be batched with a previous (undelivered) one; under
5637 certain circumstances this could lead to multiple deliveries to the same
5640 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5641 in its include files, and this causes problems building Exim.
5643 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5644 header_syntax) but Exim was just ignoring anything given after a slash.
5645 In particular, this caused confusion with an attempt to use "verify =
5646 reverse_host_lookup/defer_ok". An error is now given when options are
5647 supplied for verify items that do not have them. (Maybe reverse_host_
5648 lookup should have a defer_ok option, but that's a different point.)
5650 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5651 defined by RFC 821) to 2048, because there were problems with some AUTH
5652 commands, and RFC 1869 says the size should be increased for extended
5653 SMTP commands that take arguments.
5655 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5658 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5659 "unknown" error; now it says that the functionality isn't in the binary.
5661 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5662 an address' error message when a string expansion fails (syntax or
5663 whatever). Otherwise the password may appear in the log. Following change
5664 PH/42 below, there is no longer a chance of it appearing in a bounce
5667 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5669 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5670 of its addresses was ever tried. (Bugzilla bug #2.)
5672 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5673 the result incorrectly in the debug output. (It correctly added a newline
5674 to what was transported.)
5676 TF/01 Added $received_time.
5678 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5679 commented out examples of how to interface to a virus scanner and to
5680 SpamAssassin. Also added commented examples of av_scanner and
5681 spamd_address settings.
5683 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5684 and controls are allowed in which ACLs. There were a couple of minor
5685 errors. Some of the entries in the conditions table (which is a table of
5686 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5687 negation of where the condition IS allowed.
5689 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5691 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5692 header file does not have a version number, so I've had to invent a new
5693 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5694 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5695 radiusclient), but it was contributed by a Radius user.
5697 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5698 files or directories, for OpenSSL.
5700 PH/19 When an Exim process that is running as root has to create an Exim log
5701 file, it does so in a subprocess that runs as exim:exim so as to get the
5702 ownership right at creation (otherwise, other Exim processes might see
5703 the file with the wrong ownership). There was no test for failure of this
5704 fork() call, which would lead to the process getting stuck as it waited
5705 for a non-existent subprocess. Forks do occasionally fail when resources
5706 run out. I reviewed all the other calls to fork(); they all seem to check
5709 PH/20 When checking for unexpected SMTP input at connect time (before writing
5710 the banner), Exim was not dealing correctly with a non-positive return
5711 from the read() function. If the client had disconnected by this time,
5712 the result was a log entry for a synchronization error with an empty
5713 string after "input=" when read() returned zero. If read() returned -1
5714 (an event I could not check), uninitialized data bytes were printed.
5715 There were reports of junk text (parts of files, etc) appearing after
5718 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5720 PH/22 Added support for macro redefinition, and (re)definition in between
5721 driver and ACL definitions.
5723 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5724 forgetting to use the resulting value; it was using the unexpanded value.
5726 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5727 hadn't been configured. The fix is from Juergen Kreileder, who
5728 understands it better than I do:
5730 "Here's what I see happening with three configured cyrus_sasl
5731 authenticators configured (plain, login, cram-md5):
5733 On startup auth_cyrus_sasl_init() gets called for each of these.
5734 This means three calls to sasl_listmech() without a specified mech_list.
5735 => SASL tests which mechs of all available mechs actually work
5736 => three warnings about OTP not working
5737 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5739 With the patch, sasl_listmech() also gets called three times. But now
5740 SASL's mech_list option is set to the server_mech specified in the the
5741 authenticator. Or in other words, the answer from sasl_listmech()
5742 gets limited to just the mech you're testing for (which is different
5744 => the return list contains just 'plain' or 'login', 'cram-md5' or
5745 nothing depending on the value of ob->server_mech.
5747 I've just tested the patch: Authentication still works fine,
5748 unavailable mechs specified in the exim configuration are still
5749 caught, and the auth.log warnings about OTP are gone."
5751 PH/25 When debugging is enabled, the contents of the command line are added
5752 to the debugging output, even when log_selector=+arguments is not
5755 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5756 answer is "GNU", and only if the return is "GNU/something" is the answer
5759 PH/27 $acl_verify_message is now set immediately after the failure of a
5760 verification in an ACL, and so is available in subsequent modifiers. In
5761 particular, the message can be preserved by coding like this:
5763 warn !verify = sender
5764 set acl_m0 = $acl_verify_message
5766 Previously, $acl_verify_message was set only while expanding "message"
5767 and "log_message" when a very denied access.
5769 PH/28 Modified OS/os.c-Linux with
5771 -#ifndef OS_LOAD_AVERAGE
5772 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5774 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5775 nomenclature these days.)
5777 PH/29 Installed patch from the Sieve maintainer that adds the options
5778 sieve_useraddress and sieve_subaddress to the redirect router.
5780 PH/30 In these circumstances:
5781 . Two addresses routed to the same list of hosts;
5782 . First host does not offer TLS;
5783 . First host accepts first address;
5784 . First host gives temporary error to second address;
5785 . Second host offers TLS and a TLS session is established;
5786 . Second host accepts second address.
5787 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5788 and peerdn, if requested) that were in fact used only for the second
5791 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5792 attention to any local part prefix or suffix that was matched by the
5793 router that accepted the address. It now behaves in the same way as it
5794 does for delivery: the affixes are removed from the local part unless
5795 rcpt_include_affixes is set on the transport.
5797 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5798 timeout during the DATA phase of an incoming message.
5800 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5801 applied a patch sanctioned by the Sieve maintainer.
5803 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5804 the uid or gid is negative. A case of a negative gid caused this to be
5805 noticed. The fix allows for either to be negative.
5807 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5808 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5811 PH/36 The change PH/12 above was broken. Fixed it.
5813 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5814 the grounds that routing the same address twice would always produce the
5815 same answer. This might have been true once, but it is certainly no
5816 longer true now. Routing a child address may depend on the previous
5817 routing that produced that child. Some complicated redirection strategies
5818 went wrong when messages had multiple recipients, and made Exim's
5819 behaviour dependent on the order in which the addresses were given.
5821 I have moved the duplicate checking until after the routing is complete.
5822 Exim scans the addresses that are assigned to local and remote
5823 transports, and removes any duplicates. This means that more work will be
5824 done, as duplicates will always all be routed, but duplicates are
5825 presumably rare, so I don't expect this is of any significance.
5827 For deliveries to pipes, files, and autoreplies, the duplicate checking
5828 still happens during the routing process, since they are not going to be
5831 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5832 It corrects a timeout issue with spamd. This is Ian's comment: "The
5833 background is that sometimes spamd either never reads data from a
5834 connection it has accepted, or it never writes response data. The exiscan
5835 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5836 blindly assumes that writes won't block so it may never time out."
5838 PH/39 Allow G after quota size as well as K and M.
5840 PH/40 The value set for $authenticated_id in an authenticator may not contain
5841 binary zeroes or newlines because the value is written to log lines and
5842 to spool files. There was no check on this. Now the value is run through
5843 the string_printing() function so that such characters are converted to
5844 printable escape sequences.
5846 PH/41 $message_linecount is a new variable that contains the total number of
5847 lines in the message. Compare $body_linecount, which is the count for the
5850 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5851 bounce and delay warning messages, except in certain special cases, which
5854 (a) An SMTP error message from a remote host;
5855 (b) A message specified in a :fail: redirection;
5856 (c) A message specified in a "fail" command in a system filter;
5857 (d) A message specified in a FAIL return from the queryprogram router;
5858 (e) A message specified by the cannot_route_message router option.
5860 In these cases only, Exim does include the error details in bounce and
5861 warning messages. There are also a few cases where bland messages such
5862 as "unrouteable address" or "local delivery error" are given.
5864 PH/43 $value is now also set for the "else" part of a ${run expansion.
5866 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5867 being worked on, but at least Exim now implements the latest version to
5870 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5871 process to complete was treated as a delivery failure, a timeout while
5872 writing the message to the pipe was logged, but erroneously treated as a
5873 successful delivery. Such timeouts include transport filter timeouts. For
5874 consistency with the overall process timeout, these timeouts are now
5875 treated as errors, giving rise to delivery failures by default. However,
5876 there is now a new Boolean option for the pipe transport called
5877 timeout_defer, which, if set TRUE, converts the failures into defers for
5878 both kinds of timeout. A transport filter timeout is now identified in
5881 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5882 systems where "make" and "gmake" are different, calling "gmake" at top
5883 level broke things. I've arranged for the value of $(MAKE) to be passed
5884 from the Makefile to this script so that it can call the same version of
5888 A note about Exim versions 4.44 and 4.50
5889 ----------------------------------------
5891 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5892 changes of various kinds. As a consequence, a big documentation update was
5893 needed. This delayed the release for rather longer than seemed good, especially
5894 in the light of a couple of (minor) security issues. Therefore, the changes
5895 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5896 release. So 4.44 and 4.50 are in effect two different branches that both start
5899 I have left the 4.50 change log unchanged; it contains all the changes since
5900 4.43. The change log for 4.44 is below; many of its items are identical to
5901 those for 4.50. This seems to be the most sensible way to preserve the
5902 historical information.
5908 1. Minor wording change to the doc/README.SIEVE file.
5910 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5911 computation of the current number of files was incorrect.
5913 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5914 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5917 4. Give more explanation in the error message when the command for a transport
5918 filter fails to execute.
5920 5. There are several places where Exim runs a non-Exim command in a
5921 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5922 was being done only for the command run by the queryprogram router. It is
5923 now done for all such subprocesses. The other cases are: ${run, transport
5924 filters, and the commands run by the lmtp and pipe transports.
5926 6. Added CONFIGURE_GROUP build-time option.
5928 7. Some older OS have a limit of 256 on the maximum number of file
5929 descriptors. Exim was using setrlimit() to set 1000 as a large value
5930 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5931 systems. I've change it so that if it can't get 1000, it tries for 256.
5933 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5934 was an oversight, and furthermore, ever since the addition of extra
5935 controls (e.g. 4.43/32), the checks on when to allow different forms of
5936 "control" were broken. There should now be diagnostics for all cases when a
5937 control that does not make sense is encountered.
5939 9. Added the /retain_sender option to "control=submission".
5941 10. $recipients is now available in the predata ACL (oversight).
5943 11. Tidy the search cache before the fork to do a delivery from a message
5944 received from the command line. Otherwise the child will trigger a lookup
5945 failure and thereby defer the delivery if it tries to use (for example) a
5946 cached ldap connection that the parent has called unbind on.
5948 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5949 of $address_data from the recipient verification was clobbered by the
5950 sender verification.
5952 13. The value of address_data from a sender verification is now available in
5953 $sender_address_data in subsequent conditions in the ACL statement.
5955 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5957 15. Added a new option "connect=<time>" to callout options, to set a different
5960 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5961 was its contents. (It was OK if the option was not defined at all.)
5963 17. A "Completed" log line is now written for messages that are removed from
5964 the spool by the -Mrm option.
5966 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5967 information about exactly what failed.
5969 19. Added -dd to debug only the daemon process.
5971 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5972 handles timeouts, both on the server side and network timeouts. Renamed the
5973 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5975 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5976 It is now set to "smtps".
5978 22. $host_address is now set to the target address during the checking of
5979 ignore_target_hosts.
5981 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5982 being passed; this would have caused $sender_host_name to have been used if
5983 matching the list had actually called for a host name (not very likely,
5984 since this list is usually IP addresses). A host name is now passed as
5987 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5988 code that specifies a non-restarting handler (typically sigaction() in
5989 modern systems) in an attempt to fix a rare and obscure crash bug.
5991 25. Narrowed the window for a race in the daemon that could cause it to ignore
5992 SIGCHLD signals. This is not a major problem, because they are used only to
5993 wake it up if nothing else does.
5995 26. A malformed maildirsize file could cause Exim to calculate negative values
5996 for the mailbox size or file count. Odd effects could occur as a result.
5997 The maildirsize information is now recalculated if the size or filecount
6000 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6001 support for a long time. Removed HAVE_SYS_VFS_H.
6003 28. Installed the latest version of exipick from John Jetmore.
6005 29. In an address list, if the pattern was not a regular expression, an empty
6006 subject address (from a bounce message) matched only if the pattern was an
6007 empty string. Non-empty patterns were not even tested. This was the wrong
6008 because it is perfectly reasonable to use an empty address as part of a
6009 database query. An empty address is now tested by patterns that are
6010 lookups. However, all the other forms of pattern expect the subject to
6011 contain a local part and a domain, and therefore, for them, an empty
6012 address still always fails if the pattern is not itself empty.
6014 30. Exim went into a mad DNS loop when attempting to do a callout where the
6015 host was specified on an smtp transport, and looking it up yielded more
6016 than one IP address.
6018 31. Re-factored the code for checking spool and log partition space into a
6019 function that finds that data and another that does the check. The former
6020 is then used to implement four new variables: $spool_space, $log_space,
6021 $spool_inodes, and $log_inodes.
6023 32. The RFC2047 encoding function was originally intended for short strings
6024 such as real names; it was not keeping to the 75-character limit for
6025 encoded words that the RFC imposes. It now respects the limit, and
6026 generates multiple encoded words if necessary. To be on the safe side, I
6027 have increased the buffer size for the ${rfc2047: expansion operator from
6030 33. It is now permitted to omit both strings after an "if" condition; if the
6031 condition is true, the result is "true". As before, when the second string
6032 is omitted, a false condition yields an empty string. This makes it less
6033 cumbersome to write custom ACL and router conditions.
6035 34. Failure to deliver a bounce message always caused it to be frozen, even if
6036 there was an errors_to setting on the router. The errors_to setting is now
6039 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6040 canonical form (fully expanded) before being placed in
6041 $sender_host_address.
6043 36. The table in the code that translates DNS record types into text (T_A to
6044 "A" for instance) was missing entries for NS and CNAME. It is just possible
6045 that this could have caused confusion if both these types were looked up
6046 for the same domain, because the text type is used as part of Exim's
6047 per-process caching. But the chance of anyone hitting this buglet seems
6050 37. The dnsdb lookup has been extended in a number of ways.
6052 (1) There is a new type, "zns", which walks up the domain tree until it
6053 finds some nameserver records. It should be used with care.
6055 (2) There is a new type, "mxh", which is like "mx" except that it returns
6056 just the host names, not the priorities.
6058 (3) It is now possible to give a list of domains (or IP addresses) to be
6059 looked up. The behaviour when one of the lookups defers can be
6060 controlled by a keyword.
6062 (4) It is now possible to specify the separator character for use when
6063 multiple records are returned.
6065 38. The dnslists ACL condition has been extended: it is now possible to supply
6066 a list of IP addresses and/or domains to be looked up in a particular DNS
6069 39. Added log_selector=+queue_time_overall.
6071 40. When running the queue in the test harness, wait just a tad after forking a
6072 delivery process, to get repeatability of debugging output.
6074 41. Include certificate and key file names in error message when GnuTLS fails
6075 to set them up, because the GnuTLS error message doesn't include the name
6076 of the failing file when there is a problem reading it.
6078 42. Allow both -bf and -bF in the same test run.
6080 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6082 44. The "Exiscan patch" is now merged into the mainline Exim source.
6084 45. Sometimes the final signoff response after QUIT could fail to get
6085 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6086 < 0 before doing a fflush(). This bug looks as though it goes back to the
6087 introduction of TLS in release 3.20, but "sometimes" must have been rare
6088 because the tests only now provoked it.
6090 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6091 (this can affect the format of dates).
6093 47. exim_tidydb, when checking for the continued existence of a message for
6094 which it has found a message-specific retry record, was not finding
6095 messages that were in split spool directories. Consequently, it was
6096 deleting retry records that should have stayed in existence.
6098 48. Steve fixed some bugs in eximstats.
6100 49. The SPA authentication driver was not abandoning authentication and moving
6101 on to the next authenticator when an expansion was forced to fail,
6102 contradicting the general specification for all authenticators. Instead it
6103 was generating a temporary error. It now behaves as specified.
6105 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6106 (the order specifies the preference for clients). The order is now AES256,
6107 AES128, 3DES, ARCFOUR128.
6109 51. Small patch to Sieve code - explicitly set From: when generating an
6112 52. Exim crashed if a remote delivery caused a very long error message to be
6113 recorded - for instance if somebody sent an entire SpamAssassin report back
6114 as a large number of 550 error lines. This bug was coincidentally fixed by
6115 increasing the size of one of Exim's internal buffers (big_buffer) that
6116 happened as part of the Exiscan merge. However, to be on the safe side, I
6117 have made the code more robust (and fixed the comments that describe what
6120 53. Now that there can be additional text after "Completed" in log lines (if
6121 the queue_time_overall log selector is set), a one-byte patch to exigrep
6122 was needed to allow it to recognize "Completed" as not the last thing in
6125 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6126 patch that reportedly fixes this has been added. I am not expert enough to
6127 create a test for it. This is what the patch creator wrote:
6129 "I found a little strange behaviour of ldap code when working with
6130 Windows 2003 AD Domain, where users was placed in more than one
6131 Organization Units. When I tried to give exim partial DN, the exit code
6132 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6133 But simultaneously result of request was absolutely normal ldap result,
6134 so I produce this patch..."
6136 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6137 REFERENCE, so I have modified the code to exclude the patch when that macro
6140 55. Some experimental protocols are using DNS PTR records for new purposes. The
6141 keys for these records are domain names, not reversed IP addresses. The
6142 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6143 leaves it alone. Component reversal etc. now happens only for IP addresses.
6146 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6148 57. Double the size of the debug message buffer (to 2048) so that more of very
6149 long debug lines gets shown.
6151 58. The exicyclog utility now does better if the number of log files to keep
6152 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6154 59. Two changes related to the smtp_active_hostname option:
6156 (1) $smtp_active_hostname is now available as a variable.
6157 (2) The default for smtp_banner uses $smtp_active_hostname instead
6158 of $primary_hostname.
6160 60. The host_aton() function is supposed to be passed a string that is known
6161 to be a valid IP address. However, in the case of IPv6 addresses, it was
6162 not checking this. This is a hostage to fortune. Exim now panics and dies
6163 if the condition is not met. A case was found where this could be provoked
6164 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6165 components; fortuitously, this particular loophole had already been fixed
6166 by change 4.50/55 above.
6168 If there are any other similar loopholes, the new check in host_aton()
6169 itself should stop them being exploited. The report I received stated that
6170 data on the command line could provoke the exploit when Exim was running as
6171 exim, but did not say which command line option was involved. All I could
6172 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6173 running as the user.
6176 61. There was a buffer overflow vulnerability in the SPA authentication code
6177 (which came originally from the Samba project). I have added a test to the
6178 spa_base64_to_bits() function which I hope fixes it.
6181 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6182 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6184 63. The daemon start-up calls getloadavg() while still root for those OS that
6185 need the first call to be done as root, but it missed one case: when
6186 deliver_queue_load_max is set with deliver_drop_privilege. This is
6187 necessary for the benefit of the queue runner, because there is no re-exec
6188 when deliver_drop_privilege is set.
6190 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6191 This has been fixed.
6193 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6194 was in use, was not putting the data itself into the right store pool;
6195 consequently, it could be overwritten for a subsequent message in the same
6196 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6199 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6201 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6202 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6203 the function were treating the return as a boolean value, which happened to
6204 work because 0=false and not-0=true, but is not correct code.
6206 68. The host_aton() function was not handling scoped IPv6 addresses (those
6207 with, for example, "%eth0" on the end) correctly.
6209 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6210 negated items (that is, ~something) in unsigned ints. Some compilers
6211 apparently mutter when there is no cast.
6213 70. If an address verification called from an ACL failed, and did not produce a
6214 user-specific message (i.e. there was only a "system" message), nothing was
6215 put in $acl_verify_message. In this situation, it now puts the system
6218 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6219 session; change 4.31/43 added the unwanted input to the log line - except
6220 that it did not do this in the start of session case. It now does.
6222 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6223 This is wrong and can cause the other end to generate a synchronization
6224 error if it is another Exim or anything else that does the synchronization
6225 check. A QUIT command is no longer sent after a timeout.
6227 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6228 during host lookups.
6230 74. The defer_ok option of callout verification was not working if it was used
6231 when verifying addresses in header lines, that is, for this case:
6233 verify = header_sender/callout=defer_ok
6235 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6236 those file descriptors could be used for SMTP connections. If anything
6237 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6238 could be sent to the SMTP client, causing chaos. The daemon now opens
6239 stdin, stdout, and stderr to /dev/null when it puts itself into the
6242 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6243 log by default. The user can override this with suitable Perl magic.
6245 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6246 the log message when discard triggers, was not working for the DATA ACL or
6247 for the non-SMTP ACL.
6249 78. Error message wording change in sieve.c.
6251 79. If smtp_accept_max_per_host was set, the number of connections could be
6252 restricted to fewer than expected, because the daemon was trying to set up
6253 a new connection before checking whether the processes handling previous
6254 connections had finished. The check for completed processes is now done
6255 earlier. On busy systems, this bug wouldn't be noticed because something
6256 else would have woken the daemon, and it would have reaped the completed
6259 80. If a message was submitted locally by a user whose login name contained one
6260 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6261 It caused a spool format error. I have fixed the spool reading code. A
6262 related problem was that the "from" clause in the Received: line became
6263 illegal because of the space(s). It is now covered by ${quote_local_part.
6265 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6268 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6270 83. Patch from Sieve maintainer to fix unterminated string problem in
6271 "vacation" handling.
6273 84. Some minor changes to the Linux configuration files to help with other
6274 OS variants using glibc.
6276 85. One more patch for Sieve to update vacation handling to latest spec.
6279 ----------------------------------------------------
6280 See the note above about the 4.44 and 4.50 releases.
6281 ----------------------------------------------------
6287 1. Change 4.43/35 introduced a bug that caused file counts to be
6288 incorrectly computed when quota_filecount was set in an appendfile
6291 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6292 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6295 3. Give more explanation in the error message when the command for a transport
6296 filter fails to execute.
6298 4. There are several places where Exim runs a non-Exim command in a
6299 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6300 was being done only for the command run by the queryprogram router. It is
6301 now done for all such subprocesses. The other cases are: ${run, transport
6302 filters, and the commands run by the lmtp and pipe transports.
6304 5. Some older OS have a limit of 256 on the maximum number of file
6305 descriptors. Exim was using setrlimit() to set 1000 as a large value
6306 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6307 systems. I've change it so that if it can't get 1000, it tries for 256.
6309 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6310 was an oversight, and furthermore, ever since the addition of extra
6311 controls (e.g. 4.43/32), the checks on when to allow different forms of
6312 "control" were broken. There should now be diagnostics for all cases when a
6313 control that does not make sense is encountered.
6315 7. $recipients is now available in the predata ACL (oversight).
6317 8. Tidy the search cache before the fork to do a delivery from a message
6318 received from the command line. Otherwise the child will trigger a lookup
6319 failure and thereby defer the delivery if it tries to use (for example) a
6320 cached ldap connection that the parent has called unbind on.
6322 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6323 of $address_data from the recipient verification was clobbered by the
6324 sender verification.
6326 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6327 was its contents. (It was OK if the option was not defined at all.)
6329 11. A "Completed" log line is now written for messages that are removed from
6330 the spool by the -Mrm option.
6332 12. $host_address is now set to the target address during the checking of
6333 ignore_target_hosts.
6335 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6336 being passed; this would have caused $sender_host_name to have been used if
6337 matching the list had actually called for a host name (not very likely,
6338 since this list is usually IP addresses). A host name is now passed as
6341 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6342 code that specifies a non-restarting handler (typically sigaction() in
6343 modern systems) in an attempt to fix a rare and obscure crash bug.
6345 15. Narrowed the window for a race in the daemon that could cause it to ignore
6346 SIGCHLD signals. This is not a major problem, because they are used only to
6347 wake it up if nothing else does.
6349 16. A malformed maildirsize file could cause Exim to calculate negative values
6350 for the mailbox size or file count. Odd effects could occur as a result.
6351 The maildirsize information is now recalculated if the size or filecount
6354 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6355 support for a long time. Removed HAVE_SYS_VFS_H.
6357 18. Updated exipick to current release from John Jetmore.
6359 19. Allow an empty sender to be matched against a lookup in an address list.
6360 Previously the only cases considered were a regular expression, or an
6363 20. Exim went into a mad DNS lookup loop when doing a callout where the
6364 host was specified on the transport, if the DNS lookup yielded more than
6367 21. The RFC2047 encoding function was originally intended for short strings
6368 such as real names; it was not keeping to the 75-character limit for
6369 encoded words that the RFC imposes. It now respects the limit, and
6370 generates multiple encoded words if necessary. To be on the safe side, I
6371 have increased the buffer size for the ${rfc2047: expansion operator from
6374 22. Failure to deliver a bounce message always caused it to be frozen, even if
6375 there was an errors_to setting on the router. The errors_to setting is now
6378 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6379 canonical form (fully expanded) before being placed in
6380 $sender_host_address.
6382 24. Updated eximstats to version 1.33
6384 25. Include certificate and key file names in error message when GnuTLS fails
6385 to set them up, because the GnuTLS error message doesn't include the name
6386 of the failing file when there is a problem reading it.
6388 26. Expand error message when OpenSSL has problems setting up cert/key files.
6391 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6392 (this can affect the format of dates).
6394 28. exim_tidydb, when checking for the continued existence of a message for
6395 which it has found a message-specific retry record, was not finding
6396 messages that were in split spool directories. Consequently, it was
6397 deleting retry records that should have stayed in existence.
6399 29. eximstats updated to version 1.35
6400 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6401 1.35 - bugfix such that pie charts by volume are generated correctly
6403 30. The SPA authentication driver was not abandoning authentication and moving
6404 on to the next authenticator when an expansion was forced to fail,
6405 contradicting the general specification for all authenticators. Instead it
6406 was generating a temporary error. It now behaves as specified.
6408 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6409 (the order specifies the preference for clients). The order is now AES256,
6410 AES128, 3DES, ARCFOUR128.
6412 31. Small patch to Sieve code - explicitly set From: when generating an
6415 32. Exim crashed if a remote delivery caused a very long error message to be
6416 recorded - for instance if somebody sent an entire SpamAssassin report back
6417 as a large number of 550 error lines. This bug was coincidentally fixed by
6418 increasing the size of one of Exim's internal buffers (big_buffer) that
6419 happened as part of the Exiscan merge. However, to be on the safe side, I
6420 have made the code more robust (and fixed the comments that describe what
6423 33. Some experimental protocols are using DNS PTR records for new purposes. The
6424 keys for these records are domain names, not reversed IP addresses. The
6425 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6426 leaves it alone. Component reversal etc. now happens only for IP addresses.
6429 34. The host_aton() function is supposed to be passed a string that is known
6430 to be a valid IP address. However, in the case of IPv6 addresses, it was
6431 not checking this. This is a hostage to fortune. Exim now panics and dies
6432 if the condition is not met. A case was found where this could be provoked
6433 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6434 components; fortuitously, this particular loophole had already been fixed
6435 by change 4.50/55 or 4.44/33 above.
6437 If there are any other similar loopholes, the new check in host_aton()
6438 itself should stop them being exploited. The report I received stated that
6439 data on the command line could provoke the exploit when Exim was running as
6440 exim, but did not say which command line option was involved. All I could
6441 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6442 running as the user.
6445 35. There was a buffer overflow vulnerability in the SPA authentication code
6446 (which came originally from the Samba project). I have added a test to the
6447 spa_base64_to_bits() function which I hope fixes it.
6450 36. The daemon start-up calls getloadavg() while still root for those OS that
6451 need the first call to be done as root, but it missed one case: when
6452 deliver_queue_load_max is set with deliver_drop_privilege. This is
6453 necessary for the benefit of the queue runner, because there is no re-exec
6454 when deliver_drop_privilege is set.
6456 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6457 was in use, was not putting the data itself into the right store pool;
6458 consequently, it could be overwritten for a subsequent message in the same
6459 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6462 38. Sometimes the final signoff response after QUIT could fail to get
6463 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6464 < 0 before doing a fflush(). This bug looks as though it goes back to the
6465 introduction of TLS in release 3.20, but "sometimes" must have been rare
6466 because the tests only now provoked it.
6472 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6473 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6474 Now it returns an integer. A number of calls were still expecting a T/F
6475 return. Fortuitously, in all cases, the tests worked in OK situations,
6476 which is the norm. However, things would have gone wrong on any write
6477 failures on the smtp file descriptor. This function is used when sending
6478 messages over SMTP and also when doing verify callouts.
6480 2. When Exim is called to do synchronous delivery of a locally submitted
6481 message (the -odf or -odi options), it no longer closes stderr before doing
6484 3. Implemented the mua_wrapper option.
6486 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6488 5. Implemented the functions header_remove(), header_testname(),
6489 header_add_at_position(), and receive_remove_recipient(), and exported them
6492 6. If an ACL "warn" statement specified the addition of headers, Exim already
6493 inserted X-ACL-Warn: at the start if there was no header name. However, it
6494 was not making this test for the second and subsequent header lines if
6495 there were newlines in the string. This meant that an invalid header could
6496 be inserted if Exim was badly configured.
6498 7. Allow an ACL "warn" statement to add header lines at the start or after all
6499 the Received: headers, as well as at the end.
6501 8. Added the rcpt_4xx retry error code.
6503 9. Added postmaster_mailfrom=xxx to callout verification option.
6505 10. Added mailfrom=xxxx to the callout verification option, for verify=
6508 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6509 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6511 12. Inserted some casts to stop certain compilers warning when using pointer
6512 differences as field lengths or precisions in printf-type calls (mostly
6513 affecting debugging statements).
6515 13. Added optional readline() support for -be (dynamically loaded).
6517 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6518 same clock tick as a message's arrival, so that its received time was the
6519 same as the "first fail" time on the retry record, and that message
6520 remained on the queue past the ultimate address timeout, every queue runner
6521 would try a delivery (because it was past the ultimate address timeout) but
6522 after another failure, the ultimate address timeout, which should have then
6523 bounced the address, did not kick in. This was a "< instead of <=" error;
6524 in most cases the first failure would have been in the next clock tick
6525 after the received time, and all would be well.
6527 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6528 being recognized when the domain list was tested by the match_domain
6529 condition in an expansion string.
6531 16. Added the ${str2b64: operator.
6533 17. Exim was always calling setrlimit() to set a large limit for the number of
6534 processes, without checking whether the existing limit was already
6535 adequate. (It did check for the limit on file descriptors.) Furthermore,
6536 errors from getrlimit() and setrlimit() were being ignored. Now they are
6537 logged to the main and panic logs, but Exim does carry on, to try to do its
6538 job under whatever limits there are.
6540 18. Imported PCRE 5.0.
6542 19. Trivial typo in log message " temporarily refused connection" (the leading
6545 20. If the log selector return_path_on_delivery was set and an address was
6546 redirected to /dev/null, the delivery process crashed because it assumed
6547 that a return path would always be set for a "successful" delivery. In this
6548 case, the whole delivery is bypassed as an optimization, and therefore no
6551 21. Internal re-arrangement: the function for sending a challenge and reading
6552 a response while authentication was assuming a zero-terminated challenge
6553 string. It's now changed to take a pointer and a length, to allow for
6554 binary data in such strings.
6556 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6558 23. Exim was not respecting finduser_retries when seeking the login of the
6559 uid under which it was called; it was always trying 10 times. (The default
6560 setting of finduser_retries is zero.) Also, it was sleeping after the final
6561 failure, which is pointless.
6563 24. Implemented tls_on_connect_ports.
6565 25. Implemented acl_smtp_predata.
6567 26. If the domain in control=submission is set empty, Exim assumes that the
6568 authenticated id is a complete email address when it generates From: or
6569 Sender: header lines.
6571 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6572 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6573 chown and chgrp in /bin and hostname in /usr/bin.
6575 28. Exim was keeping the "process log" file open after each use, just as it
6576 does for the main log. This opens the possibility of it remaining open for
6577 long periods when the USR1 signal hits a daemon. Occasional processlog
6578 errors were reported, that could have been caused by this. Anyway, it seems
6579 much more sensible not to leave this file open at all, so that is what now
6582 29. The long-running daemon process does not normally write to the log once it
6583 has entered its main loop, and it closes the log before doing so. This is
6584 so that log files can straightforwardly be renamed and moved. However,
6585 there are a couple of unusual error situations where the daemon does write
6586 log entries, and I had neglected to close the log afterwards.
6588 30. The text of an SMTP error response that was received during a remote
6589 delivery was being truncated at 512 bytes. This is too short for some of
6590 the long messages that one sometimes sees. I've increased the limit to
6593 31. It is now possible to make retry rules that apply only when a message has a
6594 specific sender, in particular, an empty sender.
6596 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6597 it possible to be selective about when SMTP synchronization is enforced.
6599 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6601 32. Implemented hosts_connection_nolog.
6603 33. Added an ACL for QUIT.
6605 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6608 35. Added mailbox_size and mailbox_filecount to appendfile.
6610 36. Added control = no_multiline_responses to ACLs.
6612 37. There was a bug in the logic of the code that waits for the clock to tick
6613 in the case where the clock went backwards by a substantial amount such
6614 that the microsecond fraction of "now" was more than the microsecond
6615 fraction of "then" (but the whole seconds number was less).
6617 38. Added support for the libradius Radius client library this is found on
6618 FreeBSD (previously only the radiusclient library was supported).
6624 1. When certain lookups returned multiple values in the form name=value, the
6625 quoting of the values was not always being done properly. Specifically:
6626 (a) If the value started with a double quote, but contained no whitespace,
6628 (b) If the value contained whitespace other than a space character (i.e.
6629 tabs or newlines or carriage returns) it was not quoted.
6630 This fix has been applied to the mysql and pgsql lookups by writing a
6631 separate quoting function and calling it from the lookup code. The fix
6632 should probably also be applied to nisplus, ibase and oracle lookups, but
6633 since I cannot test any of those, I have not disturbed their existing code.
6635 2. A hit in the callout cache for a specific address caused a log line with no
6636 reason for rejecting RCPT. Now it says "Previous (cached) callout
6637 verification failure".
6639 3. There was an off-by-one bug in the queryprogram router. An over-long
6640 return line was truncated at 256 instead of 255 characters, thereby
6641 overflowing its buffer with the terminating zero. As well as fixing this, I
6642 have increased the buffer size to 1024 (and made a note to document this).
6644 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6645 when Exim is waiting for an SMTP response from a remote server, Exim
6646 restarts its select() call on the socket, thereby resetting its timeout.
6647 This is not a problem when such interrupts are rare. Somebody set up a cron
6648 job to run exiwhat every 2 minutes, which is less than the normal select()
6649 timeout (5 or 10 minutes). This meant that the select() timeout never
6650 kicked in because it was always reset. I have fixed this by comparing the
6651 time when an interrupt arrives with the time at the start of the first call
6652 to select(). If more time than the timeout has elapsed, the interrupt is
6653 treated as a timeout.
6655 5. Some internal re-factoring in preparation for the addition of Sieve
6656 extensions (by MH). In particular, the "personal" test is moved to a
6657 separate function, and given an option for scanning Cc: and Bcc: (which is
6658 not set for Exim filters).
6660 6. When Exim created an email address using the login of the caller as the
6661 local part (e.g. when creating a From: or Sender: header line), it was not
6662 quoting the local part when it contained special characters such as @.
6664 7. Installed new OpenBSD configuration files.
6666 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6667 try to make them clearer.
6669 9. Callout options, other than the timeout value, were being ignored when
6670 verifying sender addresses in header lines. For example, when using
6672 verify = header_sender/callout=no_cache
6674 the cache was (incorrectly) being used.
6676 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6677 only the Cygwin environment.
6679 11. When return_path_on_delivery was set as a log selector, if different remote
6680 addresses in the same message used different return paths and parallel
6681 remote delivery occurred, the wrong values would sometimes be logged.
6682 (Whenever a remote delivery process finished, the return path value from
6683 the most recently started remote delivery process was logged.)
6685 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6686 lines when AUTH and/or TLS are in use. This is the "received protocol"
6687 field. Exim used to use "asmtp" for authenticated SMTP, without any
6688 indication (in the protocol name) for TLS use. Now it follows the RFC and
6689 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6690 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6691 names appear in log lines as well as in Received: header lines.
6693 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6694 extensions, and comparison tests, and to fix some bugs.
6696 14. Changes to the "personal" filter test:
6698 (1) The test was buggy in that it was just doing the equivalent of
6699 "contains" tests on header lines. For example, if a user's address was
6700 anne@some.where, the "personal" test would incorrectly be true for
6702 To: susanne@some.where
6704 This test is now done by extracting each address from the header in turn,
6705 and checking the entire address. Other tests that are part of "personal"
6706 are now done using regular expressions (for example, to check local parts
6707 of addresses in From: header lines).
6709 (2) The list of non-personal local parts in From: addresses has been
6710 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6711 taken from the Sieve specification recommendations.
6713 (3) If the message contains any header line starting with "List-" it is
6714 treated as non-personal.
6716 (4) The test for "circular" in the Subject: header line has been removed
6717 because it now seems ill-conceived.
6719 15. Minor typos in src/EDITME comments corrected.
6721 16. Installed latest exipick from John Jetmore.
6723 17. If headers_add on a router specified a text string that was too long for
6724 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6725 of string_sprintf() is now avoided.
6727 18. $message_body_size was not set (it was always zero) when running the DATA
6728 ACL and the local_scan() function.
6730 19. For the "mail" command in an Exim filter, no default was being set for
6731 the once_repeat time, causing a random time value to be used if "once" was
6732 specified. (If the value happened to be <= 0, no repeat happened.) The
6733 default is now 0s, meaning "never repeat". The "vacation" command was OK
6734 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6735 (I found it when inspecting the code).
6737 20. There is now an overall timeout for performing a callout verification. It
6738 defaults to 4 times the callout timeout, which applies to individual SMTP
6739 commands during the callout. The overall timeout applies when there is more
6740 than one host that can be tried. The timeout is checked before trying the
6741 next host. This prevents very long delays if there are a large number of
6742 hosts and all are timing out (e.g. when the network connections are timing
6743 out). The value of the overall timeout can be changed by specifying an
6744 additional sub-option for "callout", called "maxwait". For example:
6746 verify = sender/callout=5s,maxwait=20s
6748 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6749 to the end before writing, but this should make it even safer).
6751 22. Exim was forgetting that it had advertised PIPELINING for the second and
6752 subsequent messages on an SMTP connection. It was also not resetting its
6753 memory on STARTTLS and an internal HELO.
6755 23. When Exim logs an SMTP synchronization error within a session, it now
6756 records whether PIPELINING has been advertised or not.
6758 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6759 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6760 rather than long int.
6762 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6764 26. Added the never_mail option to autoreply.
6770 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6771 crash if the getsockname() call failed; this can happen if a connection is
6772 closed very soon after it is established. The problem was simply in the
6773 order in which certain operations were done, causing Exim to try to write
6774 to the SMTP stream before it had set up the file descriptor. The bug has
6775 been fixed by making things happen in the correct order.
6781 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6782 before the connection was closed, thus losing the rejection response.
6784 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6785 some early Solaris releases, but causes trouble in current releases where
6786 socklen_t is defined.
6788 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6791 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6794 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6795 that releasing the top of it at the end releases what was used for sub-
6796 expansions (unless the block got too big). However, discard this block if
6797 the first thing is a variable or header, so that we can use its block when
6798 it is dynamic (useful for very large $message_headers, for example).
6800 6. Lookups now cache *every* query, not just the most recent. A new, separate
6801 store pool is used for this. It can be recovered when all lookup caches are
6802 flushed. Lookups now release memory at the end of their result strings.
6803 This has involved some general refactoring of the lookup sources.
6805 7. Some code has been added to the store_xxx() functions to reduce the amount
6806 of flapping under certain conditions.
6808 8. log_incoming_interface used to affect only the <= reception log lines. Now
6809 it causes the local interface and port to be added to several more SMTP log
6810 lines, for example "SMTP connection from", and rejection lines.
6812 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6814 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6816 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6817 could be overwritten at the end of the current message (or the start of a
6818 new message if it was set in a HELO ACL). The value is now preserved for
6819 the duration of the SMTP connection.
6821 12. If a transport had a headers_rewrite setting, and a matching header line
6822 contained an unqualified address, that address was qualified, even if it
6823 did not match any rewriting rules. The underlying bug was that the values
6824 of the flags that permit the existence of unqualified sender and recipient
6825 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6826 non-local messages, and by -bnq for local messages) were not being
6827 preserved with the message after it was received.
6829 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6830 "next input=" as part of the text comprising the host identity instead of
6831 the correct text. The code was using the same buffer for two different
6832 strings. However, depending on which order the printing function evaluated
6833 its arguments, the bug did not always show up. Under Linux, for example, my
6834 test suite worked just fine.
6836 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6837 doesn't work with some older versions of Perl. It has been changed to "my",
6838 which in any case is probably the better facility to use.
6840 15. A really picky compiler found some instances of statements for creating
6841 error messages that either had too many or two few arguments for the format
6844 16. The size of the buffer for calls to the DNS resolver has been increased
6845 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6846 for addresses that have a lot of PTR records. This alleviates a problem; it
6847 does not fully solve it.
6849 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6850 buffer now truncates the list and logs the incident, which is the same
6851 action as happens when Exim is looking up a host name and its aliases.
6852 Previously in this situation something unpredictable would happen;
6853 sometimes it was "internal error: store_reset failed".
6855 18. If a server dropped the connection unexpectedly when an Exim client was
6856 using GnuTLS and trying to read a response, the client delivery process
6857 crashed while trying to generate an error log message.
6859 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6860 string, for example:
6862 warn message = H1: something\nH2: something
6864 the text was added as a single header line from Exim's point of view
6865 though it ended up OK in the delivered message. However, searching for the
6866 second and subsequent header lines using $h_h2: did not work. This has been
6867 fixed. Similarly, if a system filter added multiple headers in this way,
6868 the routers could not see them.
6870 20. Expanded the error message when iplsearch is called with an invalid key to
6871 suggest using net-iplsearch in a host list.
6873 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6874 ACLs are no longer actually imposed (and a message to that effect is
6877 22. If a "gecos" field in a passwd entry contained escaped characters, in
6878 particular, if it contained a \" sequence, Exim got it wrong when building
6879 a From: or a Sender: header from that name. A second bug also caused
6880 incorrect handling when an unquoted " was present following a character
6881 that needed quoting.
6883 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6884 was not being matched caselessly.
6886 24. Arranged for all hyphens in the exim.8 source to be escaped with
6889 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6890 properly. Recipient callout cache records were still being keyed to include
6891 the sender, even when use_sender was set false. This led to far more
6892 callouts that were necessary. The sender is no longer included in the key
6893 when use_sender is false.
6895 26. Added "control = submission" modifier to ACLs.
6897 27. Added the ${base62d: operator to decode base 62 numbers.
6899 28. dnsdb lookups can now access SRV records.
6901 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6902 the configuration file.
6904 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6905 (-v) mode. This makes the output for a verbose queue run more intelligible.
6907 31. Added a use_postmaster feature to recipient callouts.
6909 32. Added the $body_zerocount variable, containing the number of binary zero
6910 bytes in the message body.
6912 33. The time of last modification of the "new" subdirectory is now used as the
6913 "mailbox time last read" when there is a quota error for a maildir
6916 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6918 35. Added +ignore_unknown as a special item in host lists.
6920 36. Code for decoding IPv6 addresses in host lists is now included, even if
6921 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6922 address was recognized as an IP address, but was then not correctly decoded
6923 into binary, causing unexpected and incorrect effects when compared with
6930 1. Very minor rewording of debugging text in manualroute to say "list of
6931 hosts" instead of "hostlist".
6933 2. If verify=header_syntax was set, and a header line with an unqualified
6934 address (no domain) and a large number of spaces between the end of the
6935 name and the colon was received, the reception process suffered a buffer
6936 overflow, and (when I tested it) crashed. This was caused by some obsolete
6937 code that should have been removed. The fix is to remove it!
6939 3. When running in the test harness, delay a bit after writing a bounce
6940 message to get a bit more predictability in the log output.
6942 4. Added a call to search_tidyup() just before forking a reception process. In
6943 theory, someone could use a lookup in the expansion of smtp_accept_max_
6944 per_host which, without the tidyup, could leave open a database connection.
6946 5. Added the variables $recipient_data and $sender_data which get set from a
6947 lookup success in an ACL "recipients" or "senders" condition, or a router
6948 "senders" option, similar to $domain_data and $local_part_data.
6950 6. Moved the writing of debug_print from before to after the "senders" test
6953 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6954 problems for message scanning, either using a data ACL, or using
6955 local_scan() because the Received: header was not generated till after they
6956 were called (in order to set the time as the time of reception completion).
6957 I have revised the way this works. The header is now generated after the
6958 body is received, but before the ACL or local_scan() are called. After they
6959 are run, the timestamp in the header is updated.
6965 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6966 before starting a queue runner without re-exec. This happened only when
6967 deliver_drop_privilege was set or when the Exim user was set to root. The
6968 effect of the bug was that timeouts during subsequent deliveries caused
6969 crashes instead of being properly handled. The handler is now left at its
6970 default (and expected) setting.
6972 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6973 message, again when deliver_drop_privilege is set or Exim is run as root.
6974 The bug described in (1) was not present in this case, but the tidying up
6975 of the other signals was missing. I have made the two cases consistent.
6977 3. The ignore_target_hosts setting on a manualroute router was being ignored
6978 for hosts that were looked up using the /MX notation.
6980 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6983 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6984 operated on the sender address. After changing the $sender_address to <>
6985 for the sender address verify, Exim was re-instated it as the original
6986 (before rewriting) address, but remembering that it had rewritten it, so it
6987 wasn't rewriting it again. This bug also had the effect of breaking the
6988 sender address verification caching when the sender address was rewritten.
6990 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6991 This has been changed so that if the ip literal address matches
6992 ignore_target_hosts, the router declines.
6994 7. Added expansion conditions match_domain, match_address, and match_local_
6995 part (NOT match_host).
6997 8. The placeholder for the Received: header didn't have a length field set.
6999 9. Added code to Exim itself and to exim_lock to test for a specific race
7000 condition that could lead to file corruption when using MBX delivery. The
7001 issue is with the lockfile that is created in /tmp. If this file is removed
7002 after a process has opened it but before that process has acquired a lock,
7003 there is the potential for a second process to recreate the file and also
7004 acquire a lock. This could lead to two Exim processes writing to the file
7005 at the same time. The added code performs the same test as UW imapd; it
7006 checks after acquiring the lock that its file descriptor still refers to
7007 the same named file.
7009 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7010 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7013 11. Added the smtp_active_hostname option. If used, this will typically be made
7014 to depend on the incoming interface address. Because $interface_address is
7015 not set up until the daemon has forked a reception process, error responses
7016 that can happen earlier (such as "too many connections") no longer contain
7019 12. If an expansion in a condition on a "warn" statement fails because a lookup
7020 defers, the "warn" statement is abandoned, and the next ACL statement is
7021 processed. Previously this caused the whole ACL to be aborted.
7023 13. Added the iplsearch lookup type.
7025 14. Added ident_timeout as a log selector.
7027 15. Added tls_certificate_verified as a log selector.
7029 16. Added a global option tls_require_ciphers (compare the smtp transport
7030 option of the same name). This controls incoming TLS connections.
7032 17. I finally figured out how to make tls_require_ciphers do a similar thing
7033 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7034 before starting the TLS session.
7036 18. Tabs are now shown as \t in -bP output.
7038 19. If the log selector return_path_on_delivery was set, Exim crashed when
7039 bouncing a message because it had too many Received: header lines.
7041 20. If two routers both had headers_remove settings, and the first one included
7042 a superfluous trailing colon, the final name in the first list and the
7043 first name in the second list were incorrectly joined into one item (with a
7044 colon in the middle).
7050 1. Added -C and -D options to the exinext utility, mainly to make it easier
7051 to include in the automated testing, but these could be helpful when
7052 multiple configurations are in use.
7054 2. The exinext utility was not formatting the output nicely when there was
7055 an alternate port involved in the retry record key, nor when there was a
7056 message id as well (for retries that were specific to a specific message
7057 and a specific host). It was also confused by IPv6 addresses, because of
7058 the additional colons they contain. I have fixed the IPv4 problem, and
7059 patched it up to do a reasonable job for IPv6.
7061 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7062 delivery, the log line now contains "pipelined" if PIPELINING was used.
7064 4. An SMTP transport process used to panic and die if the bind() call to set
7065 an explicit outgoing interface failed. This has been changed; it is now
7066 treated in the same way as a connect() failure.
7068 5. A reference to $sender_host_name in the part of a conditional expansion
7069 that was being skipped was still causing a DNS lookup. This no longer
7072 6. The def: expansion condition was not recognizing references to header lines
7073 that used bh_ and bheader_.
7075 7. Added the _cache feature to named lists.
7077 8. The code for checking quota_filecount in the appendfile transport was
7078 allowing one more file than it should have been.
7080 9. For compatibility with Sendmail, the command line option
7088 and sets the incoming protocol and host name (for trusted callers). The
7089 host name and its colon can be omitted when only the protocol is to be set.
7090 Note the Exim already has two private options, -pd and -ps, that refer to
7091 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7092 "s", but I don't think that's a major issue.
7094 10. A number of refactoring changes to the code, none of which should affect
7097 (a) The number of logging options was getting close to filling up the
7098 32-bit word that was used as a bit map. I have split them into two classes:
7099 those that are passed in the argument to log_write(), and those that are
7100 only ever tested independently outside of that function. These are now in
7101 separate 32-bit words, so there is plenty of room for expansion again.
7102 There is no change in the user interface or the logging behaviour.
7104 (b) When building, for example, log lines, the code previously used a
7105 macro that called string_cat() twice, in order to add two strings. This is
7106 not really sufficiently general. Furthermore, there was one instance where
7107 it was actually wrong because one of the argument was used twice, and in
7108 one call a function was used. (As it happened, calling the function twice
7109 did not affect the overall behaviour.) The macro has been replaced by a
7110 function that can join an arbitrary number of extra strings onto a growing
7113 (c) The code for expansion conditions now uses a table and a binary chop
7114 instead of a serial search (which was left over from when there were very
7115 few conditions). Also, it now recognizes conditions like "pam" even when
7116 the relevant support is not compiled in: a suitably worded error message is
7117 given if an attempt is made to use such a condition.
7119 11. Added ${time_interval:xxxxx}.
7121 12. A bug was causing one of the ddress fields not to be passed back correctly
7122 from remote delivery subprocesses. The field in question was not being
7123 subsequently used, so this caused to problems in practice.
7125 13. Added new log selectors queue_time and deliver_time.
7127 14. Might have fixed a bug in maildirsizefile handling that threw up
7128 "unexpected character" debug warnings, and recalculated the data
7129 unnecessarily. In any case, I expanded the warning message to give more
7132 15. Added the message "Restricted characters in address" to the statements in
7133 the default ACL that block characters like @ and % in local parts.
7135 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7136 Three changes have been made:
7138 (a) There was a serious bug; a negative response to MAIL caused the whole
7139 recipient domain to be cached as invalid, thereby blocking all messages
7140 to all local parts at the same domain, from all senders. This bug has
7141 been fixed. The domain is no longer cached after a negative response to
7142 MAIL if the sender used is not empty.
7144 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7147 (c) A new callout option, "use_sender" has been added for people who want
7148 the modified behaviour.
7154 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7157 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7158 indeed breaks things for older releases.
7160 3. Added additional logging to the case where there is a problem reading data
7161 from a filter that is running in a subprocess using a pipe, in order to
7162 try to track down a specific problem.
7164 4. Testing facility fudge: when running in the test harness and attempting
7165 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7166 getting "No route to host". Convert this to a timeout.
7168 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7171 6. Some OS don't have socklen_t but use size_t instead. This affects the
7172 fifth argument of getsockopt() amongst other things. This is now
7173 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7174 can be set for individual OS. I have set it for SunOS5, OSF1, and
7175 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7176 some earlier ones do not.
7178 7. Change 4.30/15 was not doing the test caselessly.
7180 8. The standard form for an IPv6 address literal was being rejected by address
7181 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7182 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7183 this, as well as the form without the "IPv6" on the front (but only when
7184 address literals are enabled, of course).
7186 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7188 10. Exim crashed if a message with an empty sender address specified by -f
7189 encountered a router with an errors_to setting. This could be provoked only
7190 by a command such as
7194 where an empty string was supplied; "<>" did not hit this bug.
7196 11. Installed PCRE release 4.5.
7198 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7199 remained set. It is now erased.
7201 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7202 times from message ids (which are base 36 rather than the normal 62).
7204 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7205 were being counted as actual protocol errors, and logged if the log
7206 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7207 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7208 and DATA following a set of rejected RCPTs do not count as protocol errors.
7209 In other words, Exim assumes they were pipelined, though this may not
7210 actually be the case. Of course, in all cases the client gets an
7211 appropriate error code.
7213 15. If a lookup fails in an ACL condition, a message about the failure may
7214 be available; it is used if testing the ACL cannot continue, because most
7215 such messages specify what the cause of the deferral is. However, some
7216 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7217 that caused an old message to be retained and used if a later statement
7218 caused a defer, replacing the real cause of the deferral.
7220 16. If an IP address had so many PTR records that the DNS lookup buffer
7221 was not large enough to hold them, Exim could crash while trying to process
7222 the truncated data. It now detects and logs this case.
7224 17. Further to 4.21/58, another change has been made: if (and only if) the
7225 first line of a message (the first header line) ends with CRLF, a bare LF
7226 in a subsequent header line has a space inserted after it, so as not to
7227 terminate the header.
7229 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7230 unnecessarily, used atoi() instead of strtol(), and didn't check the
7231 termination when getting file sizes from file names by regex.
7233 19. Completely re-implemented the support for maildirsize files, in the light
7234 of a number of problems with the previous contributed implementation
7235 (4.30/29). In particular:
7237 . If the quota is zero, the maildirsize file is maintained, but no quota is
7240 . If the maildir directory does not exist, it is created before any attempt
7241 to write a maildirsize file.
7243 . The quota value in the file is just a cache; if the quota is changed in
7244 the transport, the new value overrides.
7246 . A regular expression is available for excluding directories from the
7249 20. The autoreply transport checks the characters in options that define the
7250 message's headers; it allows continued headers, but it was checking with
7251 isspace() after an embedded newline instead of explicitly looking for a
7254 21. If all the "regular" hosts to which an address was routed had passed their
7255 expiry times, and had not reached their retry times, the address was
7256 bounced, even if fallback hosts were defined. Now Exim should go on to try
7259 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7260 equivalent code in the SMTP transport. Some hosts send humungous responses
7261 to HELO/EHLO, more than 1024 it seems.
7263 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7264 gives compiler warnings in some environments. I've now done it "properly",
7267 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7268 (because of problems with the built-in one) was declared to return uschar *
7269 instead of char *, causing compiler failure.
7271 25. Fixed a file descriptor leak when processing alias/forward files.
7273 26. Fixed a minor format string issue in dbfn.c.
7275 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7277 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7278 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7281 29. When a sender address is verified, it is cached, to save repeating the test
7282 when there is more than one recipient in a message. However, when the
7283 verification involves a callout, it is possible for different callout
7284 options to be set for different recipients. It is too complicated to keep
7285 track of this in the cache, so now Exim always runs a verification when a
7286 callout is required, relying on the callout cache for the optimization.
7287 The overhead is duplication of the address routing, but this should not be
7290 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7291 to be verified with callout=postmaster, and the main callout worked but the
7292 postmaster check failed, the verification correctly failed. However, if a
7293 subsequent RCPT command asked for sender verification *without* the
7294 postmaster check, incorrect caching caused this verification also to fail,
7297 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7298 it was not caching the DNS options (qualify_single, search_parents) that
7299 were used when the lookup failed. A subsequent lookup with different
7300 options therefore always gave the same answer, though there were cases
7301 where it should not have. (Example: a "domains = !$mx_any" option on a
7302 dnslookup router: the "domains" option is always processed without any
7303 widening, but the router might have qualify_single set.) Now Exim uses the
7304 cached value only when the same options are set.
7306 32. Added John Jetmore's "exipick" utility to the distribution.
7308 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7309 than a timeout (e.g. a certificate is required, and is not provided), an
7310 Exim server now closes the connection immediately. Previously it waited for
7311 the client to close - but if the client is SSL, it seems that they each
7312 wait for each other, leading to a delay before one of them times out.
7314 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7315 maintained 0.8.x compatibility because I don't think many are using it, and
7316 it is clearly obsolete.
7318 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7321 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7322 client certificate was expired. A simple patch fixes this, though I don't
7323 understand the full logic of why the verify callback is called multiple
7326 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7327 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7328 which causes problems with some clients (such as the Certicom SSL Plus
7329 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7330 disables the coutermeasure allowing Eudora to connect."
7332 38. Exim was not checking that a write() to a log file succeeded. This could
7333 lead to Bad Things if a log got too big, in particular if it hit a file
7334 size limit. Exim now panics and dies if it cannot write to a log file, just
7335 as it does if it cannot open a log file.
7337 39. Modified OS/Makefile-Linux so that it now contains
7339 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7341 The two -D definitions ensure that Exim is compiled with large file
7342 support, which makes it possible to handle log files that are bigger than
7345 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7346 instance) a domain was checked against a named list that involved a lookup,
7347 causing $domain_data to be set, then another domain was checked against the
7348 same list, then the first domain was re-checked, the value of $domain_data
7349 after the final check could be wrong. In particular, if the second check
7350 failed, it could be set empty. This bug probably also applied to
7353 41. The strip_trailing_dot option was not being applied to the address given
7354 with the -f command-line option.
7356 42. The code for reading a message's header from the spool was incrementing
7357 $received_count, but never initializing it. This meant that the value was
7358 incorrect (doubled) while delivering a message in the same process in which
7359 it was received. In the most common configuration of Exim, this never
7360 happens - a fresh exec is done - but it can happen when
7361 deliver_drop_privilege is set.
7363 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7364 it now includes up to 150 characters of the unexpected data in the log
7367 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7368 and building data strings. The size of both of these buffers was 10 000
7369 bytes - far larger than anybody would *ever* want, thought I. Needless to
7370 say, somebody hit the limit. I have increased the maximum line length to
7371 20 000 and the maximum data length of concatenated lines to 100 000. I have
7372 also fixed two bugs, because there was no checking on these buffers. Tsk,
7373 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7374 buffer is too small.
7376 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7377 lsearch lookups. Now it does.
7379 46. When parsing a route_list item in a manualroute router, a fixed-length
7380 buffer was used for the list of hosts. I made this 1024 bytes long,
7381 thinking that nobody would ever have a list of hosts that long. Wrong.
7382 Somebody had a whole pile of complicated expansion conditions, and the
7383 string was silently truncated, leading to an expansion error. It turns out
7384 that it is easier to change to an unlimited length (owing to other changes
7385 that have happened since this code was originally written) than to build
7386 structure for giving a limitation error. The length of the item that
7387 expands into the list of hosts is now unlimited.
7389 47. The lsearch lookup could not handle data where the length of text line was
7390 more than 4095 characters. Such lines were truncated, leading to shortened
7391 data being returned. It should now handle lines of any length.
7393 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7394 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7397 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7398 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7399 no longer happens in comment lines. A list of replacements is now placed
7400 at the head of all of the source files, except those whose only change is
7401 to replace PERL_COMMAND in the very first #! line.
7403 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7404 messages on the queue, with a bottom-up merge sort, using code contributed
7405 by Michael Haardt. This should make operations like -bp somewhat faster on
7406 large queues. It won't affect queue runners, except when queue_run_in_order
7409 51. Installed eximstats 1.31 in the distribution.
7411 52. Added support for SRV lookups to the dnslookup router.
7413 53. If an ACL referred to $message_body or $message_body_end, the value was not
7414 reset for any messages that followed in the same SMTP session.
7416 54. The store-handling optimization for building very long strings was not
7417 differentiating between the different store pools. I don't think this
7418 actually made any difference in practice, but I've tidied it.
7420 55. While running the routers to verify a sender address, $sender_address
7421 was still set to the sender address. This is wrong, because when routing to
7422 send a bounce to the sender, it would be empty. Therefore, I have changed
7423 it so that, while verifying a sender address, $sender_address is set to <>.
7424 (There is no change to what happens when verifying a recipient address.)
7426 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7427 target A or AAAA records (if not already returned) without resetting the
7428 qualify_single or search_parents options of the DNS resolver. These are
7429 inappropriate in this case because the targets of MX and SRV records must
7430 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7431 target that, when qualified, matched something in the local domain. These
7432 two options are now turned off when doing these lookups.
7434 57. It seems that at least some releases of Reiserfs (which does not have the
7435 concept of a fixed number of inodes) returns zero and not -1 for the
7436 number of available inodes. This interacted badly with check_spool_inodes,
7437 which assumed that -1 was the "no such thing" setting. What I have done is
7438 to check that the total number of inodes is greater than zero before doing
7439 the test of how many are available.
7441 58. When a "warn" ACL statement has a log_message modifier, the message is
7442 remembered, and not repeated. This is to avoid a lot of repetition when a
7443 message has many recipients that cause the same warning to be written.
7444 However, Exim was preserving the list of already written lines for an
7445 entire SMTP session, which doesn't seem right. The memory is now reset if a
7446 new message is started.
7448 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7449 debugging output unless log_rewrite was also set.
7451 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7452 of (int)(handle) when we know that handle contains (void *)(-1).
7454 61. The Exim daemon panic-logs an error return when it closes the incoming
7455 connection. However "connection reset by peer" seems to be common, and
7456 isn't really an error worthy of noting specially, so that particular error
7459 62. When Exim is trying to find all the local interfaces, it used to panic and
7460 die if the ioctl to get the interface flags failed. However, it seems that
7461 on at least one OS (Solaris 9) it is possible to have an interface that is
7462 included in the list of interfaces, but for which you get a failure error
7463 for this call. This happens when the interface is not "plumbed" into a
7464 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7465 failure of the "get flags" call assumes that the interface is down.
7467 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7468 makes life easier for people who are doing arithmetic on fields extracted
7469 from dates, where you often get leading zeros that should not be
7470 interpreted as octal.
7472 64. Added qualify_domain to the redirect router, to override the global
7475 65. If a pathologically long header line contained very many addresses (the
7476 report of this problem mentioned 10 000) and each of them was rewritten,
7477 Exim could use up a very large amount of memory. (It kept on making new
7478 copies of the header line as it rewrote, and never released the old ones.)
7479 At the expense of a bit more processing, the header rewriting function has
7480 been changed so that it no longer eats memory in this way.
7482 66. The generation of the Received: header has been moved from the time that a
7483 message starts to be received, to the time that it finishes. The timestamp
7484 in the Received: header should now be very close to that of the <= log
7485 line. There are two side-effects of this change:
7487 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7488 logged header lines no longer include the local Received: line, because
7489 it has not yet been created. The same applies to a copy of the message
7490 that is returned to a non-SMTP sender when a message is rejected.
7492 (b) When a filter file is tested using -bf, no additional Received: header
7493 is added to the test message. After some thought, I decided that this
7496 This change does not affect the value of $received_for. It is still set
7497 after address rewriting, but before local_scan() is called.
7499 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7501 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7502 gave an unhelpful panic error message, and a defer error. I have managed to
7503 change this behaviour so that it now rejects any supplied certificate,
7504 which seems right, as the list of acceptable certificates is empty.
7506 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7507 gave an unhelpful defer error. I have not managed to make this reject any
7508 supplied certificates, but the error message it gives is "no certificate
7509 supplied", which is not helpful.
7511 70. exigrep's output now also includes lines that are not associated with any
7512 message, but which match the given pattern. Implemented by a patch from
7513 Martin Sluka, which also tidied up the Perl a bit.
7515 71. Recipient callout verification, like sender verification, was using <> in
7516 the MAIL FROM command. This isn't really the right thing, since the actual
7517 sender may affect whether the remote host accepts the recipient or not. I
7518 have changed it to use the actual sender in the callout; this means that
7519 the cache record is now keyed on a recipient/sender pair, not just the
7520 recipient address. There doesn't seem to be a real danger of callout loops,
7521 since a callout by the remote host to check the sender would use <>.
7522 [SEE ABOVE: changed after hitting problems.]
7524 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7525 temporary errors. However, in the case of such a code being given after
7526 the end of a data transmission (i.e. after ".") Exim was failing to write
7527 a retry record for the message. (Yes, there was some broken host that was
7528 actually sending 8xx at this point.)
7530 73. An unknown lookup type in a host list could cause Exim to panic-die when
7531 the list was checked. (An example that provoked this was putting <; in the
7532 middle of a list instead of at the start.) If this happened during a DATA
7533 ACL check, a -D file could be left lying around. This kind of configuration
7534 error no longer causes Exim to die; instead it causes a defer error. The
7535 incident is still logged to the main and panic logs.
7537 74. Buglet left over from Exim 3 conversion. The message "too many messages
7538 in one connection" was written to the rejectlog but not the mainlog, except
7539 when address rewriting (yes!) was being logged.
7541 75. Added write_rejectlog option.
7543 76. When a system filter was run not as root (that is, when system_filter_user
7544 was set), the values of the $n variables were not being returned to the
7545 main process; thus, they were not subsequently available in the $sn
7548 77. Added +return_path_on_delivery log selector.
7550 78. A connection timeout was being treated differently from recipients deferred
7551 when testing hosts_max_try with a message that was older than the host's
7552 retry timeout. (The host should not be counted, thus allowing all hosts to
7553 be tried at least once before bouncing.) This may have been the cause of an
7554 occasionally reported bug whereby a message would remain on the queue
7555 longer than the retry timeout, but would be bounced if a delivery was
7556 forced. I say "may" because I never totally pinned down the problem;
7557 setting up timeout/retry tests is difficult. See also the next item.
7559 79. The ultimate address timeout was not being applied to errors that involved
7560 a combination of host plus message (for example, a timeout on a MAIL
7561 command). When an address resolved to a number of possible hosts, and they
7562 were not all tried for each delivery (e.g. because of hosts_max_try), a
7563 message could remain on the queue longer than the retry timeout.
7565 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7568 81. Fixed an obscure SMTP outgoing bug which required at least the following
7569 conditions: (a) there was another message waiting for the same server;
7570 (b) the server returned 5xx to all RCPT commands in the first message so
7571 that the message was not completed; (c) the server dropped the connection
7572 or gave a negative response to the RSET that Exim sends to abort the
7573 transaction. The observed case was a dropped connection after DATA that had
7574 been sent in pipelining mode. That is, the server had advertised PIPELINING
7575 but was not implementing it correctly. The effect of the bug was incorrect
7576 behaviour, such as trying another host, and this could lead to a crash.
7582 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7583 and daemon.c were passed as pointers to ints; they should have been
7584 pointers to socklen_t variables (which are typically unsigned ints).
7586 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7589 3. Fixed a really odd bug that affected only the testing scheme; patching a
7590 certain fixed string in the binary changed the value of another string that
7591 happened to be identical to the end of the original first string.
7593 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7594 name", it returns that address as the IP address. On some operating
7595 systems (e.g. Solaris), it also passes back the IP address string as the
7596 "host name". However, on others (e.g. Linux), it passes back an empty
7597 string. Exim wasn't checking for this, and was changing the host name to an
7598 empty string, assuming it had been canonicalized.
7600 5. Although rare, it is permitted to have more than one PTR record for a given
7601 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7602 all the names associated with an address, because they do in Solaris.
7603 However, it seems that they do not in Linux for data that comes from the
7604 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7605 I found this out when I moved to a new Linux workstation and tried to run
7606 the Exim test suite.
7608 To get round this problem I have changed the code so that it now does its
7609 own call to the DNS to look up PTR records when searching for a host name.
7610 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7611 addresses that are only in /etc/hosts are still found.
7613 This behaviour is, however, controlled by an option called host_lookup_
7614 order, which defaults to "bydns:byaddr". If people want to use the other
7615 order, or indeed, just use one or the other means of lookup, they can
7616 specify it in this variable.
7618 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7619 some operating systems, this comes back from gethostbyaddr() as an empty
7620 string, and this is what Exim used to test for. However, it seems that in
7621 other systems, "." is yielded. Exim now tests for this case too.
7623 7. The values of check_spool_space and check_log_space are now held internally
7624 as a number of kilobytes instead of an absolute number of bytes. If a
7625 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7626 kilobyte. This means that much larger values can be stored.
7628 8. Exim monitor: an attempt to get the action menu when not actually pointing
7629 at a message produces an empty menu entitled "No message selected". This
7630 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7631 no entries in it ("Shell widget menu has zero width and/or height"). So I
7632 have added a single, blank menu entry in this case.
7634 9. Added ${quote_local_part.
7636 10. MIME decoding is now applied to the contents of Subject: header lines when
7639 11. Now that a reference to $sender_host_address automatically causes a reverse
7640 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7641 host lookup before query-style lookups in lists that might use this
7642 variable. This has therefore been abolished, and the "net-" prefix is no
7643 longer necessary for query-style lookups.
7645 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7646 have been a typo for LFLAGS, so it has been changed.
7648 13. The install script calls Exim with "-C /dev/null" in order to find the
7649 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7650 to be output. However, since Exim outputs its version number before the
7651 error, it didn't break the script. It just looked ugly. I fixed this by
7652 always allowing "-C /dev/null" if the caller is root.
7654 14. Ignore overlarge ACL variable number when reading spool file - insurance
7655 against a later release with more variables having written the file.
7657 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7658 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7659 this, as well as the form without the "IPv6" on the front.
7661 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7662 OS/Makefile-Darwin file.
7664 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7665 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7667 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7668 variable. However, some OS use ints for inodes. I've added cast to long int
7669 to get rid of the compiler warning.
7671 19. I had forgotten to lock out "/../" in configuration file names when
7672 ALT_CONFIG_PREFIX was set.
7674 20. Routers used for verification do not need to specify transports. However,
7675 if such a router generated a host list, and callout was configured, Exim
7676 crashed, because it could not find a port number from the (non-existent)
7677 transport. It now assumes port 25 in this circumstance.
7679 21. Added the -t option to exigrep.
7681 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7682 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7683 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7684 them is set, LOOKUP_LSEARCH is forced.
7686 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7688 24. Added sender and host information to the "rejected by local_scan()" log
7689 line; previously there was no indication of these.
7691 25. Added .include_if_exists.
7693 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7694 Linux. It turns out that not all file systems support this. Apparently some
7695 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7696 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7697 not supported on the file descriptor, is now ignored when Exim is trying to
7698 sync a directory. This applies only to Linux.
7700 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7702 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7703 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7706 29. Added support for maildirsize files from supplied patch (modified a bit).
7708 30. The use of :fail: followed by an empty string could lead Exim to respond to
7709 sender verification failures with (e.g.):
7711 550 Verification failed for <xxx>
7712 550 Sender verify failed
7714 where the first response line was missing the '-' that indicates it is not
7715 the final line of the response.
7717 31. The loop for finding the name of the user that called Exim had a hardwired
7718 limit of 10; it now uses the value of finduser_retries, which is used for
7719 all other user lookups.
7721 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7724 33. Exim was neglecting to zero errno before one call of strtol() when
7725 expanding a string and expecting an integer value. On some systems this
7726 resulted in spurious "integer overflow" errors. Also, it was casting the
7727 result into an int without checking.
7729 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7730 did not work. The code looks as if it has *never* worked, though it appears
7731 to have been documented since at least release 1.62. I have made it work.
7733 35. The "timeout_DNS" error in retry rules, also documented since at least
7734 1.62, also never worked. As it isn't clear exactly what this means, and
7735 clearly it isn't a major issue, I have abolished the feature by treating it
7736 as "timeout", and writing a warning to the main and panic logs.
7738 36. The display of retry rules for -brt wasn't always showing the error code
7741 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7742 timeout_connect_A, timeout_connect_MX.
7744 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7745 to the empty sender.
7747 39. The daemon was not analysing the content of -oX till after it had closed
7748 stderr and disconnected from the controlling terminal. This meant that any
7749 syntax errors were only noted on the panic log, and the return code from
7750 the command was 0. By re-arranging the code a little, I've made the
7751 decoding happen first, so such errors now appear on stderr, and the return
7752 code is 1. However, the actual setting up of the sockets still happens in
7753 the disconnected process, so errors there are still only recorded on the
7756 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7757 connections (as happens on some IP stacks) was logged at start up time as
7758 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7759 it from "IPv6 and IPv4", which means that two separate sockets are being
7762 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7763 says whether AF_INET or AF_INET6 was passed as an argument.
7765 42. Exiwhat output was messed up when time zones were included in log
7768 43. Exiwhat now gives more information about the daemon's listening ports,
7769 and whether -tls-on-connect was used.
7771 44. The "port" option of the smtp transport is now expanded.
7773 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7774 silently ignored. Now an error message is written to the main and panic
7777 46. There's a new ACL modifier called "logwrite" which writes to a log file
7778 as soon as it is encountered.
7780 47. Added $local_user_uid and $local_user_gid at routing time.
7782 48. Exim crashed when trying to verify a sender address that was being
7785 49. Exim was recognizing only a space character after ".include". It now also
7786 recognizes a tab character.
7788 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7789 extracting the relevant information from the specification. The man page no
7790 longer contains scrambled data for the -d option, and I've added a section
7791 at the front about calling Exim under different names.
7793 51. Added "extra_headers" argument to the "mail" command in filter files.
7795 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7798 53. Installed eximstats 1.29.
7800 54. Added transport_filter_timeout as a generic transport option.
7802 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7803 Cc: header lines. This was required by RFC 822, but it not required by RFC
7806 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7807 incoming messages that did not have them. Now it does so only if the
7808 message originates locally, that is, if there is no associated remote host
7809 address. When Resent- header lines are present, this applies to the Resent-
7810 lines rather than the non-Resent- lines.
7812 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7813 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7815 58. Messages for configuration errors now include the name of the main
7816 configuration file - useful now that there may be more than one file in a
7817 list (.included file names were always shown).
7819 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7820 for those rare installations that do not start the daemon as root or run it
7821 setuid root. I've cut out the call to initgroups() if the daemon is not
7824 60. The Exim user and group can now be bound into the binary as text strings
7825 that are looked up at the start of Exim's processing.
7827 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7829 62. Added $mailstore_basename variable.
7831 63. Installed patch to sieve.c from Michael Haardt.
7833 64. When Exim failed to open the panic log after failing to open the main log,
7834 the original message it was trying to log was written to stderr and debug
7835 output, but if they were not available (the usual case in production), it
7836 was lost. Now it is written to syslog before the two lines that record the
7837 failures to open the logs.
7839 65. Users' Exim filters run in subprocesses under the user's uid. It is
7840 possible for a "deliver" command or an alias in a "personal" command to
7841 provoke an address rewrite. If logging of address rewriting is configured,
7842 this fails because the process is not running as root or exim. There may be
7843 a better way of dealing with this, but for the moment (because 4.30 needs
7844 to be released), I have disabled address rewrite logging when running a
7845 filter in a non-root, non-exim process.
7851 1. The buildconfig auxiliary program wasn't quoting the value set for
7852 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7853 not defined. This bug was masked in 4.22 by the effect that was fixed in
7856 2. Some messages that were rejected after a message id was allocated were
7857 shown as "incomplete" by exigrep. It no longer does this for messages that
7858 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7860 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7861 have allow_domain_literals set, the ID did not get logged in the <= line.
7862 Domain literals are now always recognized in Message-ID: header lines.
7864 4. The first argument for a ${extract expansion item is the key name or field
7865 number. Leading and trailing spaces in this item were not being ignored,
7866 causing some misleading effects.
7868 5. When deliver_drop_privilege was set, single queue runner processes started
7869 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7870 same command in the process it spins off) were not dropping privilege.
7872 6. When the daemon running as "exim" started a queue runner, it always
7873 re-executed Exim in the spun-off process. This is a waste of effort when
7874 deliver_drop_privilege is set. The new process now just calls the
7875 queue-runner function directly.
7881 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7884 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7885 ignored. Though the use of -oP was forcing the writing of a pid file, it
7886 was always written to the default place.
7888 3. If the message "no IP address found for host xxxx" is generated during
7889 incoming verification, it is now followed by identification of the incoming
7890 connection (so you can more easily find what provoked it).
7892 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7894 5. Added some features to "harden" Exim a bit more against certain attacks:
7896 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7897 be put in Local/Makefile. This is like the never_users runtime option,
7898 but it cannot be overridden. The default setting is "root".
7900 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7901 prefix string with which any file named in a -C command line option
7904 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7905 is retained for -C and -D only if the caller of Exim is root. Without
7906 it, the exim user may also use -C and -D and retain privilege.
7908 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7909 command line option is disabled.
7911 6. Macro names set by the -D option must start with an upper case letter, just
7912 like macro names defined in the configuration file.
7914 7. Added "dereference=" facility to LDAP.
7916 8. Two instances of the typo "uknown" in the source files are fixed.
7918 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7919 the Configure-Makefile script screwed up while processing it.
7921 10. Incorporated PCRE 4.4.
7923 11. The SMTP synchronization check was not operating right at the start of an
7924 SMTP session. For example, it could not catch a HELO sent before the client
7925 waited for the greeting. There is now a check for outstanding input at the
7926 point when the greeting is written. Because of the duplex, asynchronous
7927 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7928 way, but not yet received, when the check is performed.
7930 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7931 on TCP/IP sockets, because this apparently causes some broken clients to
7934 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7935 unchanged) from the Cygwin maintainer.
7937 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7938 was supported instead of testing for mbx. Effectively a typo.
7940 15. The spa authenticator server code was not checking that the input it
7941 received was valid base64.
7943 16. The debug output line for the "set" modifier in ACLs was not showing the
7944 name of the variable that was being set.
7946 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7948 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7949 lookup on its own. Something else was needed to trigger the lookup. For
7950 example, a match in host_lookup or the need for a host name in a host list.
7951 Now, if $sender_host_name is referenced and the host name has not yet been
7952 looked up, a lookup is performed. If the lookup fails, the variable remains
7953 empty, and $host_lookup_failed is set to "1".
7955 19. Added "eqi" as a case-independent comparison operator.
7957 20. The saslauthd authentication condition could segfault if neither service
7958 nor realm was specified.
7960 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7961 error message that was logged was misleading, and incoming SMTP
7962 connections were dropped. The message is now more accurate, and temporary
7963 errors are given to SMTP connections.
7965 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7966 (except RSET) with a 421 error, until QUIT is received. However, it was
7967 failing to send a response to QUIT.
7969 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7970 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7971 ACL is now run after the helo_try_verify_hosts code.
7973 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7974 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7975 case-independent, so other case variants are also recognized). Apparently
7976 some systems use these upper case variants.
7978 25. If more than two messages were waiting for the same host, and a transport
7979 filter was specified for the transport, Exim sent two messages over the
7980 same TCP/IP connection, and then failed with "socket operation on non-
7981 socket" when it tried to send the third.
7983 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7985 27. The extern definition of crypt16() in expand.c was not being excluded when
7986 the OS had its own crypt16() function.
7988 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7989 as a preferred synonym for return_size_limit, both as an option and as an
7992 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7994 30. Changed the default configuration ACL to relax the local part checking rule
7995 for addresses that are not in any local domains. For these addresses,
7996 slashes and pipe symbols are allowed within local parts, but the sequence
7997 /../ is explicitly forbidden.
7999 31. SPA server authentication was not clearing the challenge buffer before
8002 32. log_message in a "warn" ACL statement was writing to the reject log as
8003 well as to the main log, which contradicts the documentation and doesn't
8004 seem right (because no rejection is happening). So I have stopped it.
8006 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8007 However, I am unable to do any testing of this.
8009 34. Fixed an infelicity in the appendfile transport. When checking directories
8010 for a mailbox, to see if any needed to be created, it was accidentally
8011 using path names with one or more superfluous leading slashes; tracing
8012 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8014 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8015 contents are added to the log line that is written for every discarded
8016 recipient. (Previously a log_message setting was ignored.)
8018 36. The ${quote: operator now quotes the string if it is empty.
8020 37. The install script runs exim in order to find its version number. If for
8021 some reason other than non-existence or emptiness, which it checks, it
8022 could not run './exim', it was installing it with an empty version number,
8023 i.e. as "exim-". This error state is now caught, and the installation is
8026 38. An argument was missing from the function that creates an error message
8027 when Exim fails to connect to the socket for saslauthd authentication.
8028 This could cause Exim to crash, or give a corrupted message.
8030 39. Added isip, isip4, and isip6 to ${if conditions.
8032 40. The ACL variables $acl_xx are now saved with the message, and can be
8033 accessed later in routers, transports, and filters.
8035 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8036 strings in the file are not string-expanded.
8038 42. If a MAIL command specified a SIZE value that was too large to fit into an
8039 int variable, the check against message_size_limit failed. Such values are
8040 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8041 day this will have to be increased, but I don't think I want to be around
8042 when emails are that large.
8049 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8050 iconv() is not standard in FreeBSD.
8052 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8053 IPv6 enabled. The observed symptom was a segmentation fault on return from
8054 the function os_common_find_running_interfaces() in src/os.c.
8056 3. In the check_special_case() function in daemon.c I had used "errno" as an
8057 argument name, which causes warnings on some systems. This was basically a
8058 typo, since it was named "eno" in the comments!
8060 4. The code that waits for the clock to tick (at a resolution of some fraction
8061 of a second) so as to ensure message-id uniqueness was always waiting for
8062 at least one whole tick, when it could have waited for less. [This is
8063 almost certainly not relevant at current processor speeds, where it is
8064 unlikely to ever wait at all. But we try to future-proof.]
8066 5. The function that sleeps for a time interval that includes fractions of a
8067 second contained a race. It did not block SIGALRM between setting the
8068 timer, and suspending (a couple of lines later). If the interval was short
8069 and the sigsuspend() was delayed until after it had expired, the suspension
8070 never ended. On busy systems this could lead to processes getting stuck for
8073 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8074 process, before it forks any delivery processes. The open lookup caching
8075 mechanism meant that the open file or database connection was passed into
8076 the delivery process. The problem was that delivery processes always tidy
8077 up cached lookup data. This could cause a problem for the next delivery
8078 process started by the queue runner, because the external queue runner
8079 process does not know about the closure. So the next delivery process
8080 still has data in the lookup cache. In the case of a file lookup, there was
8081 no problem because closing a file descriptor in a subprocess doesn't affect
8082 the parent. However, if the lookup was caching a connection to a database,
8083 the connection was closed, and the second delivery process was likely to
8084 see errors such as "PGSQL: query failed: server closed the connection
8085 unexpectedly". The problem has been fixed by closing all cached lookups
8086 in a queue runner before running a delivery process.
8088 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8089 seem to have the "const" qualifier which it has on other OS. I've
8092 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8093 *of the same type* (client or server) with the same public name that an
8094 error should be diagnosed.
8096 9. When Exim looked up a host name for an IP address, but failed to find the
8097 original IP address when looking up the host name (a safety check), it
8098 output the message "<ip address> does not match any IP for NULL", which was
8099 confusing, to say the least. The bug was that the host name should have
8100 appeared instead of "NULL".
8102 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8103 user that is built into the binary, and the -C or -D options is used, root
8104 privilege is dropped before the configuration file is read. In addition,
8105 logging is switched to stderr instead of the normal log files. If the
8106 configuration then re-defines the Exim user, the unprivileged environment
8107 is probably not what is expected, so Exim logs a panic warning message (but
8110 However, if deliver_drop_privilege is set, the unprivileged state may well
8111 be exactly what is intended, so the warning has been cut out in that case,
8112 and Exim is allowed to try to write to its normal log files.
8118 1. smtp_return_error_details was not giving details for temporary sender
8119 or receiver verification errors.
8121 2. Diagnose a configuration error if two authenticators have the same public
8124 3. Exim used not to create the message log file for a message until the first
8125 delivery attempt. This could be confusing when incoming messages were held
8126 for policy or load reasons. The message log file is now created at the time
8127 the message is received, and an initial "Received" line is written to it.
8129 4. The automatically generated man page for command line options had a minor
8130 bug that caused no ill effects; however, a more serious problem was that
8131 the procedure for building the man page automatically didn't always
8132 operate. Consequently, release 4.20 contains an out-of-date version. This
8133 shouldn't happen again.
8135 5. When building Exim with embedded Perl support, the script that builds the
8136 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8137 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8139 6. The freeze_tell option was not being used for messages that were frozen on
8140 arrival, either by an ACL or by local_scan().
8142 7. Added the smtp_incomplete_transaction log selector.
8144 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8145 was accepting AUTH without a new EHLO.
8147 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8148 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8151 10. Logging of TCP/IP connections (when configured) now happens in the main
8152 daemon process instead of the child process, so that the TCP/IP connection
8153 count is more accurate (but it can never be perfect).
8155 11. The use of "drop" in a nested ACL was not being handled correctly in the
8156 outer ACL. Now, if condition failure induced by the nested "drop" causes
8157 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8158 or "require"), the connection is dropped.
8160 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8161 that yield "discard" can now be used with an "accept" or a "discard" verb,
8162 but an error is generated for any others (because I can't see a useful way
8163 to define what should happen).
8165 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8166 are now processed in the same way as lines in the Exim configuration file.
8167 In particular, continuation lines are supported.
8169 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8171 15. Added -ti meaning -t -i.
8173 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8174 domains, and warn by logging if others are found.
8176 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8177 returned from GIFCONF when Exim is trying to find the list of interfaces on
8178 a host. The code in os.c has been modified to copy each ifreq to an aligned
8179 structure in all cases.
8181 Also, in some cases, the returned ifreq's were being copied to a 'struct
8182 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8183 means the last couple of bytes of an IPv6 address could be chopped if the
8184 ifreq contained only a normal sockaddr (14 bytes storage).
8186 18. Named domain lists were not supported in the hosts_treat_as_local option.
8187 An entry such as +xxxx was not recognized, and was treated as a literal
8190 19. Ensure that header lines added by a DATA ACL are included in the reject log
8191 if the ACL subsequently rejects the message.
8193 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8194 MD5 (which is deprecated).
8196 21. When testing a filter file using -bf, Exim was writing a message when it
8197 took the sender from a "From " line in the message, but it was not doing so
8198 when it took $return_path from a Return-Path: header line. It now does.
8200 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8201 with a valid header line field name (a series of printing characters
8202 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8204 23. Changed "disc" in the source to "disk" to conform to the documentation and
8205 the book and for uniformity.
8207 24. Ignore Sendmail's -Ooption=value command line item.
8209 25. When execve() failed while trying to run a command in a pipe transport,
8210 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8211 could be confused with a return value of 69 from the command itself. This
8212 has been changed to 127, the value the shell returns if it is asked to run
8213 a non-existent command. The wording for the related log line suggests a
8214 non-existent command as the problem.
8216 26. If received_header_text expands to an empty string, do not add a Received:
8217 header line to the message. (Well, it adds a token one on the spool, but
8218 marks it "old" so that it doesn't get used or transmitted.)
8220 27. Installed eximstats 1.28 (addition of -nt option).
8222 28. There was no check for failure on the call to getsockname() in the daemon
8223 code. This can fail if there is a shortage of resources on the system, with
8224 ENOMEM, for example. A temporary error is now given on failure.
8226 29. Contrary to the C standard, it seems that in some environments, the
8227 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8228 program. Exim now does this explicitly; it affects the formatting of
8229 timestamps using strftime().
8231 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8232 complaints. I've now initialized all the variables, to avoid this.
8234 32. Header lines added by a system filter were not being "seen" during
8235 transport-time rewrites.
8237 33. The info_callback() function passed to OpenSSL is set up with type void
8238 (*)(SSL *, int, int), as described somewhere. However, when calling the
8239 function (actually a macro) that sets it up, the type void(*)() is
8240 expected. I've put in a cast to prevent warnings from picky compilers.
8242 34. If a DNS black list lookup found a CNAME record, but there were no A
8243 records associated with the domain it pointed at, Exim crashed.
8245 35. If a DNS black list lookup returned more than one A record, Exim ignored
8246 all but the first. It now scans all returned addresses if a particular IP
8247 value is being sought. In this situation, the contents of the
8248 $dnslist_value variable are a list of all the addresses, separated by a
8251 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8252 to accept a host name and all its aliases if the forward lookup for any of
8253 them yielded the IP address of the incoming connection. Now it accepts only
8254 those names whose forward lookup yields the correct IP address. Any other
8255 names are discarded. This closes a loophole whereby a rogue DNS
8256 administrator could create reverse DNS records to break through a
8257 wildcarded host restriction in an ACL.
8259 37. If a user filter or a system filter that ran in a subprocess used any of
8260 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8261 the wrong values were passed to the pipe command ($thisaddress had the
8262 value of $0, $0 had the value of $1, etc). This bug was introduced by
8263 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8265 38. Improved the line breaking for long SMTP error messages from ACLs.
8266 Previously, if there was no break point between 40 and 75 characters, Exim
8267 left the rest of the message alone. Two changes have been made: (a) I've
8268 reduced the minimum length to 35 characters; (b) if it can't find a break
8269 point between 35 and 75 characters, it looks ahead and uses the first one
8270 that it finds. This may give the occasional overlong line, but at least the
8271 remaining text gets split now.
8273 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8274 file descriptors might be low, and that setting 1000 would always raise it.
8275 It turns out that in some environments, the limit is already over 1000 and
8276 that lowering it causes trouble. So now Exim takes care not to decrease it.
8278 40. When delivering a message, the value of $return_path is set to $sender_
8279 address at the start of routing (routers may change the value). By an
8280 oversight, this default was not being set up when an address was tested by
8281 -bt or -bv, which affected the outcome if any router or filter referred to
8284 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8285 log only when "message" or "log_message" are set. However, if one of the
8286 conditions was an address verification, or a call to a nested ACL, the
8287 messages generated by the underlying test were being passed through. This
8288 no longer happens. The underlying message is available in $acl_verify_
8289 message for both "message" and "log_message" expansions, so it can be
8290 passed through if needed.
8292 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8293 new expansion $bh_ to give the encoded byte string without charset
8294 translation. Translation happens only if iconv() is available; HAVE_ICONV
8295 indicates this at build time. HEADERS_CHARSET gives the charset to
8296 translate to; headers_charset can change it in the configuration, and
8297 "headers charset" can change it in an individual filter file.
8299 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8300 that creates RFC 2047 encoded "words" labels them as that charset instead
8301 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8302 expansion operator; (ii) when Exim creates a From: line for a local
8303 message; (iii) when a header line is rewritten to include a "phrase" part.
8305 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8306 buggy, causing it to skip the first lines of messages whose message ID
8307 ended in 'D'. This would not have bitten before Exim release 4.14, because
8308 message IDs were unlikely to end in 'D' before then. The effect was to have
8309 incorrect size information for certain domains.
8311 45. #include "config.h" was missing at the start of the crypt16.c module. This
8312 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8315 46. If there was a timeout during a "random" callout check, Exim treated it as
8316 a failure of the random address, and carried on sending RSET and the real
8317 address. If the delay was just some slowness somewhere, the response to the
8318 original RCPT would be taken as a response to RSET and so on, causing
8319 mayhem of various kinds.
8321 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8322 when I implemented it. It didn't allow for the fact that some option values
8323 may legitimately be negative (e.g. size_addition), and it didn't even do
8324 the right test for positive values.
8326 48. Domain names in DNS records are case-independent. Exim always looks them up
8327 in lower case. Some resolvers return domain names in exactly the case they
8328 appear in the zone file, that is, they may contain uppercase letters. Not
8329 all resolvers do this - some return always lower case. Exim was treating a
8330 change of case by a resolver as a change of domain, similar to a widening
8331 of a domain abbreviation. This triggered its re-routing code and so it was
8332 trying to route what was effectively the same domain again. This normally
8333 caused routing to fail (because the router wouldn't handle the domain
8334 twice). Now Exim checks for this case specially, and just changes the
8335 casing of the domain that it ultimately uses when it transmits the message
8338 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8341 50. If a filter generated a file delivery with a non-absolute name (possible if
8342 no home directory exists for the router), the forbid_file option was not
8345 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8346 the existing equality matching.
8348 52. Exim was using ints instead of ino_t variables in some places where it was
8349 dealing with inode numbers.
8351 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8352 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8353 called TMPDIR, and if it finds it is different, it changes its value.
8355 54. The smtp_printf() function is now made available to local_scan() so
8356 additional output lines can be written before returning. There is also an
8357 smtp_fflush() function to enable the detection of a dropped connection.
8358 The variables smtp_input and smtp_batched_input are exported to
8361 55. Changed the default runtime configuration: the message "Unknown user"
8362 has been removed from the ACL, and instead placed on the localuser router,
8363 using the cannot_route_message feature. This means that any verification
8364 failures that generate their own messages won't get overridden. Similarly,
8365 the "Unrouteable address" message that was in the ACL for unverifiable
8366 relay addresses has also been removed.
8368 56. Added hosts_avoid_esmtp to the smtp transport.
8370 57. The exicyclog script was not checking for the esoteric option
8371 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8372 will work only if exicyclog is run under the appropriate euid.
8374 58. Following a discussion on the list, the rules by which Exim recognises line
8375 endings on incoming messages have been changed. The -dropcr and drop_cr
8376 options are now no-ops, retained only for backwards compatibility. The
8377 following line terminators are recognized: LF CRLF CR. However, special
8378 processing applies to CR:
8380 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8381 nor a local message in the state where . is a terminator.
8383 (ii) If a bare CR is encountered in a header line, an extra space is added
8384 after the line terminator so as not to end the header. The reasoning
8385 behind this is that bare CRs in header lines are most likely either
8386 to be mistakes, or people trying to play silly games.
8388 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8389 was being incorrectly given as 18 bytes larger than it should have been.
8390 This is a VOB (very old bug).
8392 60. This may never have affected anything current, but just in case it has:
8393 When the local host is found other than at the start of a list of hosts,
8394 the local host, those with the same MX, and any that follow, are discarded.
8395 When the list in question was part of a longer list of hosts, the following
8396 hosts (not currently being processed) were also being discarded. This no
8397 longer happens. I'm not sure if this situation could ever has previously
8400 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8403 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8404 header. This is something that is recommended in a new Internet Draft, and
8405 is something that is documented as being done by Sendmail. There are two
8406 possible values. For messages generated by the autoreply transport, Exim
8409 Auto-Submitted: auto-replied
8411 whereas for all other generated messages (e.g. bounces) it adds
8413 Auto-Submitted: auto-generated
8415 63. The "personal" condition in filters now includes a test for the
8416 Auto-Submitted: header. If it contains the string "auto-" the message it
8417 not considered personal.
8419 64. Added rcpt_include_affixes as a generic transport option.
8421 65. Added queue_only_override (default true).
8423 66. Added the syslog_duplication option.
8425 67. If what should have been the first header line of a message consisted of
8426 a space followed by a colon, Exim was mis-interpreting it as a header line.
8427 It isn't of course - it is syntactically invalid and should therefore be
8428 treated as the start of the message body. The misbehaviour could have
8429 caused a number of strange effects, including loss of data in subsequent
8430 header lines, and spool format errors.
8432 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8433 client host had authenticated. This control can now be exercised by an ACL
8434 for more flexibility.
8436 69. By default, callouts do not happen when testing with -bh. There is now a
8437 variant, -bhc, which does actually run the callout code, including
8438 consulting and updating the callout cache.
8440 70. Added support for saslauthd authentication, courtesy of Alexander
8443 71. If statvfs() failed on the spool or log directories while checking their
8444 size for availability, Exim confusingly gave the error "space shortage".
8445 Furthermore, in debugging mode it crashed with a floating point exception.
8446 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8447 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8448 serious problem, Exim now writes to the main and panic logs when this
8449 happens, with details of the failure. It then refuses to accept the
8450 incoming message, giving the message "spool directory problem" or "log
8451 directory problem" with a 421 code for SMTP messages.
8453 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8454 0, 1, and 2 exist, because some OS complain for execs without them (see
8455 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8456 descriptors. However, the code omitted to check that the open succeeded,
8457 causing mysterious errors if for some reason the permissions on /dev/null
8458 got screwed. Now Exim writes a message to the main and panic logs, and
8459 bombs out if it can't open /dev/null.
8461 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8462 interact so that it is all more flexible. It is supposed to remain
8463 backwards compatible. Also added extra_local_interfaces.
8465 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8466 to bomb out with an assertion failure - to the client this appears as a
8467 connection drop. This problem occurs in the part of the code that was taken
8468 from the Samba project. Fortunately, the assertion is in a very simple
8469 function, so I have fixed this by reproducing the function inline in the
8470 one place where it is called, and arranging for authentication to fail
8471 instead of killing the process with assert().
8473 75. The SPA client code was not working when the server requested OEM rather
8474 than Unicode encoding.
8476 76. Added code to make require_files with a specific uid setting more usable in
8477 the case where statting the file as root fails - usually a non-root-mounted
8478 NFS file system. When this happens and the failure is EACCES, Exim now
8479 forks a subprocess and does the per-uid checking as the relevant uid.
8481 77. Added process_log_path.
8483 78. If log_file_path was not explicitly set, a setting of check_log_space or
8484 check_log_inodes was ignored.
8486 79. If a space check for the spool or log partitions fails, the incident is now
8487 logged. Of course, in the latter case the data may get lost...
8489 80. Added the %p formatting code to string_format() so that it can be used to
8490 print addresses in debug_print(). Adjusted all the address printing in the
8491 debugging in store.c to use %p rather than %d.
8493 81. There was a concern that a line of code in smtp_in.c could overflow a
8494 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8495 initially expressed, the concern was not well-founded, because trailing
8496 spaces are removed early. However, if the trailing spaces were followed by
8497 a NULL, they did not get removed, so the overflow was possible. Two fixes
8500 (a) I re-wrote the offending code in a cleaner fashion.
8501 (b) If an incoming SMTP command contains a NULL character, it is rejected
8504 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8505 runs initgroups(), so that if the Exim user is in any additional groups,
8506 they will be used during message reception.
8512 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob