1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
8 JH/01 Support list of dkim results in the dkim_status ACL condition, making
9 it more usable in the data ACL.
11 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
12 Previously This was only logged, on the assumption that errors would be
13 seen for a previous fflush(). However, a fuse filesystem has been
14 reported as showing this an error for the fclose(). The spool is now in
15 an uncertain state, and we have logged and responded acceptance. Change
16 this to respond with a temp-reject, wipe spoolfiles, and log the error
19 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
20 during a recipient verify callout, a QUIT command was attempted on the
21 now-closed callout channel, causing a paniclog entry.
23 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
24 a connection_reject log_selector, under tls_on_connect. Previously
25 with this combination, when the connect ACL rejected, a spurious
26 paniclog entry was made.
28 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
29 of loadbalancer-detection for resumption, in 4.96 - which tries to
30 use the EHLO response. SMTPS does not have one at the time it is starting
31 TLS. Change the default for the smtp transport host_name_extract option
32 to be a static string, for TLS-on-connect cases; meaning that resumption
33 will always be attempted (unless deliberately overriden).
35 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
36 chunk-separator specification. This was broken by hardening introduced
39 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
40 included the -H with the id; this also messed up exiqgrep.
42 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
43 was not properly skipped and empty elements would cause mis-parsing.
44 Tighten parsing of DKIM header records. Previously, all but lowercase
45 alpha chars would be ignored in potential tag names.
47 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
48 being searched. Previously we only had one for IPv4 addresses. Per the
49 documentation, the error results by default in a no-match result for the
50 list. It is logged if the unknown_in_list log_selector is used.
57 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
58 SMTP connection" log lines.
60 JH/02 Option default value updates:
61 - queue_fast_ramp (main) true (was false)
62 - remote_max_parallel (main) 4 (was 2)
64 JH/03 Cache static regex pattern compilations, for use by ACLs.
66 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
67 Make the rewrite never match and keep the logging. Trust the
68 admin to be using verify=header-syntax (to actually reject the message).
70 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
71 (under Linux) we watch the dir containing the final file; previously
72 it would be the dir with the first symlink. We still do not monitor
75 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
76 dn_expand() is happy to pass them through.
78 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
79 the file with the proof had an unchanged name, the new proof(s) were
80 loaded on top of the old ones (and nover used; the old ones were stapled).
82 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
83 more than one message arrived in a single connection a reference from
84 the earlier message could be re-used. Often a sigsegv resulted.
85 These variables were introduced in Exim 4.87.
86 Debug help from Graeme Fowler.
88 JH/09 Fix ${filter } for conditions that modify $value. Previously the
89 modified version would be used in construction the result, and a memory
92 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
93 Find and fix by Jasen Betts.
95 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
96 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
97 the systemwide configuration to override the Exim config.
99 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
100 API changes in libopendmarc.
102 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
103 pid 1, in the normal "background daemon" mode, having to drop process-
104 group leadership also lost track of needing to create listener sockets.
106 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
107 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
109 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
110 a capture group which obtained no text (eg. "(abc)*" matching zero
111 occurrences) could cause a segfault if the corresponding $<n> was
114 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
115 included a close-brace character (eg. it itself used an expansion) an
118 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
119 starting TLS. Previously it was after, meaning that attackers on such
120 ports had to be screened using the host_reject_connection main config
121 option. The new sequence aligns better with the STARTTLS behaviour, and
122 permits defences against crypto-processing load attacks, even though it
123 is strictly an incompatible change.
124 Also, avoid sending any SMTP fail response for either the connect ACL
125 or host_reject_connection, for TLS-on-connect ports.
127 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
128 Previously this was not permitted, but it makes reasonable sense.
129 While there, restore a restriction on using it from a connect ACL; given
130 the change JH/16 it could only return false (and before 4.91 was not
133 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
134 was exactly sized compared to the log buffer, a crash occurred with the
135 misleading message "bad memory reference; pool not found".
136 Found and traced by Jasen Betts.
138 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
139 dns_again_means_nonexist included an element causing a DNS lookup which
140 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
141 included (though probably not limited to) a process crash from stack
142 memory limit, or from excessive open files. Replace this with a paniclog
143 whine (as this is likely a configuration error), and returning
146 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
147 this always failed, probably leading to the usual downgrade to in-clear
150 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
151 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
152 to not checking that list for these lookups.
154 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
157 JH/23 Fix crash in string expansions. Previously, if an empty variable was
158 immediately followed by an expansion operator, a null-indirection read
159 was done, killing the process.
161 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
162 include an SMTP response string which is longer than that supported
163 by the delivering transport. Alleviate by wrapping such lines before
166 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
167 chars (RFC limit). Previously a limit of 12 items was made, which with
168 a not-impossible References: in the message being bounced could still
169 be over-large and get stopped in the transport.
171 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
172 close. Previously a bare socket close was done.
174 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
177 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
178 message being considered for delivery was already being handled by
179 another process, and having an SMTP connection already open, the function
180 to close it tried to use an uninitialized variable. This would afftect
181 high-volume sites more, especially when running mailing-list-style loads.
182 Pollution of logs was the major effect, as the other process delivered
183 the message. Found and partly investigated by Graeme Fowler.
185 JH/29 Change format of the internal ID used for message identification. The old
186 version only supported 31 bits for a PID element; the new 64 (on systems
187 which can use Base-62 encoding, which is all currently supported ones
188 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
189 and must use Base-36). The new ID is 23 characters rather than 16, and is
190 visible in various places - notably logs, message headers, and spool file
191 names. Various of the ancillary utilities also have to know the format.
192 As well as the expanded PID portion, the sub-second part of the time
193 recorded in the ID is expanded to support finer precision. Theoretically
194 this permits a receive rate from a single comms channel of better than the
196 The major timestamp part of the ID is not changed; at 6 characters it is
197 usable until about year 3700.
198 Updating from previously releases is fully supported: old-format spool
199 files are still usable, and the utilities support both formats. New
200 message will use the new format. The one hints-DB file type which uses
201 message-IDs (the transport wait- DB) will be discarded if an old-format ID
202 is seen; new ones will be built with only new-format IDs.
203 Optionally, a utility can be used to convert spool files from old to new,
204 but this is only an efficiency measure not a requirement for operation
205 Downgrading from new to old requires running a provided utility, having
206 first stopped all operations. This will convert any spool files from new
207 back to old (losing time-precision and PID information) and remove any
208 wait- hints databases.
210 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
211 we treated them as item separators when parsing for a list item, but they
212 need to be protected by the doublequotes. While there, add handling for
215 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
216 Found and fixed by Jasen Betts. No testcase for this as my usual text
217 editor insists on emitting only valid UTF-8.
219 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
220 a null-indirection SIGSEGV for the receive process.
222 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
223 -bh use. Internal checking would spot this and take a panic.
225 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
226 In 4.96 this would expand to empty.
228 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
229 certificate. Find and fix by Andreas Metzler.
231 JH/36 Add ARC info to DMARC hostory records.
233 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
234 or fakedefer. Previously the sender could discover that the message
235 had in fact been accepted.
237 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
238 sequences. Previously the input was not noted as being tainted; notably
239 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
240 bad coding of authenticators.
242 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
243 and ${tr...}. Found and diagnosed by Heiko Schlichting.
245 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
246 could be triggered by externally-supplied input. Found by Trend Micro.
249 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
250 be triggered by externally-controlled input. Found by Trend Micro.
253 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
254 be triggered by externally-controlled input. Found by Trend Micro.
257 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
258 Make the rewrite never match and keep the logging. Trust the
259 admin to be using verify=header-syntax (to actually reject the message).
261 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
264 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
270 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
271 after reception to before a subsequent reception. This should
272 mean slightly faster delivery, and also confirmation of reception
275 JH/02 Move from using the pcre library to pcre2. The former is no longer
276 being developed or supported (by the original developer).
278 JH/03 Constification work in the filters module required a major version
279 bump for the local-scan API. Specifically, the "headers_charset"
280 global which is visible via the API is now const and may therefore
281 not be modified by local-scan code.
283 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
284 sendfile() didi not account for the way the ClamAV driver code called it.
286 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
287 time check was being done for every character; replace that with one
290 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
291 sent was prefixed with a length byte.
293 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
294 RFC 5321. Previously Dovecot (at least) would log errors during
297 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
298 in 4.61 without a reason logged. Binaries will be bigger, which might
299 matter on diskspace-constrained systems, but debug is easier.
301 JH/09 Fix macro-definition during "-be" expansion testing. The move to
302 write-protected store for macros had not accounted for these runtime
303 additions; fix by removing this protection for "-be" mode.
305 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
306 handing out large-numbered file descriptors, violating the usual Unix
307 assumption (and required by Posix) that the lowest possible number will be
308 allocated by the kernel when a new one is needed. In the daemon, and any
309 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
310 are not useable for FD_SET() [and hence select()] and overwrite the stack.
311 Assorted crashes happen.
313 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
314 main-section options or in a connect ACL, the value from the first ever
315 connection was never replaced for subsequent connections. Found by
318 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
319 though only once PCRE2 was introduced: the memory accounting used under
320 debug offset allocations by an int, giving a hard trap in early startup.
321 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
323 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
324 with underbars is given. The write-protection of configuration introduced
325 in 4.95 trapped when normalisation was applied to an option not needing
328 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
330 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
331 failing to close the certificates directory, every hour or any time it
334 JH/16 Debugging initiated by an ACL control now continues through into routing
335 and transport processes. Previously debugging stopped any time Exim
336 re-execs, or for processing a queued message.
338 JH/17 The "expand" debug selector now gives more detail, specifically on the
339 result of expansion operators and items.
341 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
342 bad comparison between the option value and the name of the file to
343 be included was done, and a mismatch was wrongly identified.
344 4.88 to 4.95 are affected.
346 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
348 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
349 supplied as the db file-pair basename. Previously, if a directory
350 path was given, for example via the autoreply "once" option, the DB
351 file.pag and file.dir files would be created in that directory's
354 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
355 "taint" log_selector. These were previously deprecated.
357 JH/22 Fix static address-list lookups to properly return the matched item.
358 Previously only the domain part was returned.
360 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
361 the call into OpenSSL to send a TLS Close was being repeated; this
362 resulted in the library waiting for the peer's Close. If that was never
363 sent we waited forever. Fix by tracking send calls.
365 JH/24 The ${run} expansion item now expands its command string elements after
366 splitting. Previously it was before; the new ordering makes handling
367 zero-length arguments simpler. The old ordering can be obtained by
368 appending a new option "preexpand", after a comma, to the "run".
370 JH/25 Taint-check exec arguments for transport-initiated external processes.
371 Previously, tainted values could be used. This affects "pipe", "lmtp" and
372 "queryprogram" transport, transport-filter, and ETRN commands.
373 The ${run} expansion is also affected: in "preexpand" mode no part of
374 the command line may be tainted, in default mode the executable name
377 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
378 the the facility was not passed across execs, and only the first message
379 passed over a connection could use BDAT; any further ones using DATA.
381 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
382 uses $sending_ip_address and an interface is specified.
383 Previously any use of the local address in the EHLO name disabled
384 PIPECONNECT, the common case being to use the rDNS of it.
386 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
387 resumption. Previously verify failed because no certificate status is
388 passed on the wire for the restarted session. Fix by using the recorded
389 ocsp status of the stored session for the new connection.
391 JH/29 TLS resumption: the key for session lookup in the client now includes
392 more info that a server could potentially use in configuring a TLS
393 session, avoiding oferring mismatching sessions to such a server.
394 Previously only the server IP was used.
396 JH/30 Fix string_copyn() for limit greater than actual string length.
397 Previously the copied amount was the limit, which could result in a
398 overlapping memcpy for newly allocated destination soon after a
399 source string shorter than the limit. Found/investigated by KM.
401 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
402 close; it may be needed for a subsequent connection. This caused a
403 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
405 JH/32 Fix CHUNKING for a second message on a connection when the first was
406 rejected. Previously we did not reset the chunking-offered state, and
407 erroneously rejected the BDAT command. Investigation help from
410 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
411 an empty address. Previously the expansion returned an error.
413 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
414 proxy. Previously these were misparsed, leading to paniclog entries.
420 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
421 related applications. Previously an "H" was used where available info
422 says that "M" should be, so change to match.
424 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
425 as arguments, so an implementation trying to copy these into a local
426 buffer was taking a taint-enforcement trap. Fix by using dynamically
427 created buffers. Similar fix for radius expansion condition.
429 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
430 reasonable, eg. to count headers. Fix by using dynamically created
431 buffers rather than a local. Do similar fixes for ACL actions "dcc",
432 "log_reject_target", "malware" and "spam"; the arguments are expanded
433 so could be handling tainted values.
435 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
436 broken the (no-op) support for this sendmail command. Restore it
437 to doing nothing, silently, and returning good status.
439 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
440 record path was given (or the default used) without a leading directory
441 path, an error occurred on trying to open it. Use the transport's working
444 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
445 transport. Previously it was the name on the DNS A-record; use instead
446 the head of the CNAME chain leading there (if there is one). This seems
447 to align better with RFC 6125.
449 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
450 smtp_accept_max_per_host allocated resources which were not released
451 when the limit was exceeded. This eventually crashed the daemon. Fix
452 by adding a release action in that path.
454 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
455 expanded; previously using tainted values was rejected. Fix by using
456 dynamically-created buffers.
458 JH/09 Relax restrictions on ACL verify condition needing access to message
459 headers. Previously they were only permitted in data and non-smtp ACLs;
460 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
461 not_blind, header_sender and header_names_ascii verification.
463 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
464 Previously a macro used one argument twice; when called with the
465 argument as an expression having side-effects, incorrect operation
466 resulted. Use an inlineable function.
468 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
469 held open for a verify callout. Previously this wan not accounted for
470 and a corrupt onward SMTP conversation resulted.
472 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
473 Previously they were embedded naively in the constructed address; when
474 needed, strip the quoting and quote the entire local_part.
475 Also make the inbound_srs expansion condition handle quoting.
477 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
478 excluded, not matching the documentation.
480 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
481 was given for the sqlite_dbfile a trap resulted.
483 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
484 "name" argument resulted in a trap. There is no reason to disallow such;
485 this was a coding error.
487 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
488 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
489 spent suspended, ignoring the POSIX definition. Previously we assumed
490 it did and a constant offset from real time could be used as a correction.
491 Change to using the same clock source for the start-of-message and the
492 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
493 exists, just to get a clock slightly more aligned to reality.
495 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
496 RFC says it is optional some validators care. The missing char was not
497 intended but triggered by a line-wrap alignment. Discovery and fix by
498 Guillaume Outters, hacked on by JH.
500 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
501 name being quoted was tainted a trap would be taken. Fix by using
502 dynamically created buffers. The routine could have been called by a
503 rewrite with the "h" flag, by using the "-F" command-line option, or
504 by using a "name=" option on a control=submission ACL modifier.
506 JH/19 SPF: change the Authentication-Results expansion component to give
507 smtp.helo when the sender domain is empty. Previously it gave
510 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
511 not in 127.0.0.0/8 to help in spotting list domains taken over by a
512 domain-parking registrar.
514 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
515 Previously when a whitespace character was specified it was not inserted
516 after removing the newline.
518 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
519 the domain part of the recipient address. This overrides any tls_sni
520 option set, which was previously used.
522 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
525 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
526 is_tainted() had an off-by-one error in the overenthusiastic direction.
527 Find and fix by Gavan. Although NetBSD is not a supported platform for
528 4.94 this bug could affect other platforms.
530 PP/01 Fix default prime selection to be consistent.
531 One path used ike23 still, instead of exim.dev.20160529.3; now both
532 execution flows will use the same DH primes (currently
533 exim.dev.20160529.3).
535 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
536 option in smtp transport, to match the documentation. Previously
537 verification was not being done in some cases where it should have been.
539 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
540 than one server was defined and depending on the platform memory layout
541 details, an internal consistency trap could be hit while walking the list
544 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
545 files. The value is used by the authresults expansion item. Previously
546 if this was used in a router or transport, a crash could result.
548 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
549 have a sufficient incidence of EINTR returns from select that an
550 interaction with other operations done by the main daemon loop exposed
551 a bug in the error-handling. This was benign apart from the log
554 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
555 for consistency with delivered "=>" and failed "**" lines. While we're
556 there, handle PRX and TFO.
558 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
559 applied. This resulted, if any header-line rewrite rules were configured,
560 in a panic-log triggerable by sending a message with a long address in
561 a header. Fix by increasing the arbitrary limit to larger than a single
562 (dewrapped) 5322 header line maximum size.
564 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
565 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
566 RFC 6648 which deprecates X- options in protocols as a general practice.
567 Changeover between the implementations is handled by the mechanisms
570 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
571 a remote which uses callout/hold. Previously the local was queued.
573 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
576 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
577 log line. The asterisk is now consistently appended to the remote IP
578 (and port, if given), and will also be provided on defer and fail log
579 lines. Previously it could be placed on the local IP if that was being
580 logged, and was only provided on delivery lines.
582 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
584 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
585 authenticator client_send option. Previously the next char, after a pair
586 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
587 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
588 documentation. There is still no way to get a leading ^ immediately
589 after a NUL (ie. for the password of a PLAIN method authenticator.
591 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
592 files. For bad sizes read, delete the record and whine to paniclog.
594 JH/38 When logging an AUTH failure, as server, do not include sensitive
595 information. Previously, the credentials would be included if given
596 as part of the AUTH command line and an ACL denied authentication.
598 JH/39 Bug 2691: fix $local_part_data. When the matching list element
599 referred to a file, bad data was returned. This likely also affected
602 JH/40 The gsasl authenticator now supports caching of the salted password
603 generated by the client-side implementation. This required the addition
604 of a new variable: $auth4.
606 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
607 left undeleted; the attempt to re-create it then failed - resulting in
608 the usual "SIGHUP tp have daemon reload configuration" to not work.
609 This affected any platform not supporting "abstract" Unix-domain
610 sockets (i.e. not Linux).
612 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
613 recipients" response to RCPT in a later response, with a 250. The
614 previous coding assumed this would not happen, and under PIPELINING
615 would result in both lost and duplicate recipients for a message.
617 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
618 Previously the weighting was incorrectly applied. Similar fix for socks
619 proxies. Found and fixed by Heiko Schlichting.
621 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
622 not handle sub-lists included using the +namedlist syntax. While
623 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
624 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
627 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
628 Previously the permanent pool was used, so the sore could not be freed.
629 This meant a connection with many messages would use continually-growing
632 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
633 per-pool so as not to waste too much space. Previously a constant size
634 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
635 DOS attacks harder. The cost is wasted memory use in the larger blocks.
637 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
638 same space repeatedly, and a smaller process footprint.
640 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
641 for GnuTLS. Previously the name started "%s" which, while not a bug,
642 looked as if if might be one.
644 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
645 "continued connection") make the $proxy_* variables available. Previously
646 the information was not passed across the exec() call for subsequent
647 transport executions. This also mean that the log lines for the
648 messages can show the proxy information.
650 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
651 receive time. With modern systems the difference is significant.
652 The historical behaviour can be restored by disabling (a new) log_selector
653 "queue_time_exclusive".
655 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
656 content) were specifically tested for. Now, also cover expansions
657 resulting in ACL names and inline ACL content.
659 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
660 making it unusable in complex expressions.
662 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
663 fail with a taint-check on the spoolfile name, and leave the message
666 HS/01 Enforce absolute PID file path name.
668 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
670 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
672 PP/02 Bug 2643: Correct TLS DH constants.
673 A missing NUL termination in our code-generation tool had led to some
674 incorrect Diffie-Hellman constants in the Exim source.
675 Reported by kylon94, code-gen tool fix by Simon Arlott.
677 PP/03 Impose security length checks on various command-line options.
678 Fixes CVE-2020-SPRSS reported by Qualys.
680 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
681 better. Reported by Qualys.
683 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
684 providing a particularly obnoxious sender full name.
687 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
689 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
692 PP/08 Change default for recipients_max from unlimited to 50,000.
694 PP/09 Fix security issue with too many recipients on a message (to remove a
695 known security problem if someone does set recipients_max to unlimited,
696 or if local additions add to the recipient list).
697 Fixes CVE-2020-RCPTL reported by Qualys.
699 PP/10 Fix security issue in SMTP verb option parsing
700 Fixes CVE-2020-EXOPT reported by Qualys.
702 PP/11 Fix security issue in BDAT state confusion.
703 Ensure we reset known-good where we know we need to not be reading BDAT
704 data, as a general case fix, and move the places where we switch to BDAT
705 mode until after various protocol state checks.
706 Fixes CVE-2020-BDATA reported by Qualys.
708 HS/03 Die on "/../" in msglog file names
710 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
711 the Exim runtime user are allowed to create files.
713 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
716 QS/03 When reading the output from interpreted forward files we do not
717 pass the pipe between the parent and the interpreting process to
718 executed child processes (if any).
720 QS/04 Always die if requested from internal logging, even is logging is
723 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
724 the API; compilation noo longer completes with DMARC support included.
725 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
726 been reported on other platforms.
728 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
730 JH/56 Make the majority of info read from config files readonly, for defence-in-
731 depth against exploits. Suggestion by Qualys.
732 Not supported on Solaris 10.
734 JH/57 Fix control=fakreject for a custom message containing tainted data.
735 Previously this resulted in a log complaint, due to a re-expansion present
736 since fakereject was originally introduced.
738 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
739 modifier was given, a loop resulted.
741 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
742 pipelined SMTP command followed the BDAT LAST then it would be
743 incorrectly treated as part of the message body, causing a verification
746 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
747 require looser validation rules than those for 821-level addresses,
748 which only permit IP addresses.
754 JH/01 Avoid costly startup code when not strictly needed. This reduces time
755 for some exim process initialisations. It does mean that the logging
756 of TLS configuration problems is only done for the daemon startup.
758 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
760 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
761 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
764 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
765 DKIM signing is being done. Previously a transport_filter would always
766 disable CHUNKING, falling back to traditional DATA.
768 JH/05 Regard command-line recipients as tainted.
770 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
772 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
773 PAM library frees one of the arguments given to it, despite the
774 documentation. Therefore a plain malloc must be used.
776 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
777 on-stack buffers were used, resulting in a taint trap when DSN information
778 copied from a received message was written into the buffer.
780 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
781 the ordering of its ARC headers. This caused a crash.
783 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
784 a new record was being constructed with information from the peer, a trap
787 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
788 installation would get error messages from DMARC verify, when it hit the
789 nonexistent file indicated by the default. Distros wanting DMARC enabled
790 should both provide the file and set the option.
791 Also enforce no DMARC verification for command-line sourced messages.
793 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
794 could, depending on the platform, hang at the STARTTLS response.
796 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
797 message on a connection. Previously if one message had ARC headers and
798 the following one did not, a crash could result when adding an
799 Authentication-Results: header.
801 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
802 Exim main code and Exim-related utities. The introduction of taint
803 tracking also did many adjustments to string handling. Since then, eximon
804 frequently terminated with an assert failure.
806 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
807 check for 452 responses. This slightly helps the inefficieny of doing
808 a large alias-expansion into a recipient-limited target. The max_rcpt
809 transport option still applies (and at the current default, will override
810 the new feature). The check is done for either cause of synch, and forces
811 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
812 connection. The new facility is not tunable at this time.
814 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
815 library live data was being used, so the results became garbage. Make
816 copies while it is still usable.
818 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
819 on delivery deferred (==) and failed (**) lines (if a delivery was
820 attemtped). Previously it was only on completion (=>) lines.
822 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
823 for the expansion of the server_scram_iter and server_scram_salt options.
825 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
826 are now specifically given a NO_DATA response without hitting the system
827 resolver. The library goes on to do the now-standard TXT lookup.
828 Use of dnsdb lookups is not affected.
830 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
831 only retrieve the errormessage once. Previously two calls to dlerror()
832 were used, and the second one (for mainlog/paniclog) retrieved null
835 JH/20 Taint checking: disallow use of tainted data for
836 - the appendfile transport file and directory options
837 - the pipe transport command
838 - the autoreply transport file, log and once options
839 - file names used by the redirect router (including filter files)
841 - paths used by single-key lookups
842 Previously this was permitted.
844 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
845 adjusted the size of a major service buffer; this failed because the
846 buffer was in use at the time. Change to a compile-time increase in the
847 buffer size, when this authenticator is compiled into exim.
849 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
850 previous fast-mode was untenable in the face of glibs using mmap to
851 support larger malloc requests.
853 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
854 New values supported, if defined on system where compiled:
855 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
856 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
858 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
859 running a limited number of proceses in parallel, a benefit is gained. The
860 amount varies with the platform hardware and load. The use of the option
861 queue_run_in_order means we cannot do this, as ordering becomes
864 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
865 had introduced a string-copy (for ensuring NUL-termination) which was not
866 appropriate for that case, which can include embedded NUL bytes in the
867 block of data. Investigation showed the copy to actually be needless, the
868 data being length-specified.
870 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
871 done during a receiving connection, and both used TLS, global info was
872 used rather than per-connection info for tracking the state of data
873 queued for transmission. This could result in a connection hang.
875 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
876 Previously, when delivering serveral messages down a single connection
877 only the first would provide a SIZE. This was due to the size information
878 not being properly tracked.
880 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
881 TAI (at 37 seconds currently), pretend to be in UTC for time-related
882 expansion and logging. Previously, spurious values such as a future
883 minute could be seen.
885 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
886 it could crash from a null-deref. This could also affect the
887 ${addresses: } operator and ${readsock } item.
889 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
890 message following a mime one, the variable was not reset.
892 JH/30 When an pipelined-connect fails at the first response, assume incorrect
893 cached capability (perhaps the peer reneged?) and immediately retry in
896 JH/31 Fix spurious detection of timeout while writing to transport filter.
898 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
899 an attempt to copy the string was made before checking it.
901 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
902 taint of the lookup key was maintained; we now regard the presence in the
903 filesystem as sufficient validation.
905 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
906 argument is supplied.
908 JH/35 The dsearch lookup now requires that the directory is an absolute path.
909 Previously this was not checked, and nonempty relative paths made an
910 access under Exim's current working directory.
912 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
913 Previously no event was raised.
915 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
916 parameter supplied by the sender MAIL FROM command. Previously it was
917 ignored, and only the check_spool_space option value for the required
920 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
921 the size of the signing public-key. Previously it was instead giving
922 the size of the signature hash.
924 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
925 the default. See the (new) dkim_verify_min_keysizes option.
927 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
928 and an ACL use a lookup for checking either the local_part or domain,
929 stale data could be accessed. Ensure that variable references are
930 dropped between messages.
932 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
933 by the client was not checked as pointing within response data before
934 being used. A malicious client could thus cause an out-of-bounds read and
935 possibly gain authentication. Fix by adding the check.
937 JH/42 Internationalisation: change the default for downconversion in the smtp
938 transport to be "if needed". Previously it was "as previously set" for
939 the message, which usually meant "if needed" for message-submission but
940 "no" for everything else. However, MTAs have been seen using SMTPUTF8
941 even when the envelope addresses did not need it, resulting in forwarding
942 failures to non-supporting MTAs. A downconvert in such cases will be
943 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
944 transport. The change does mean that addresses needing conversion will
945 be converted when previously a delivery failure would occur.
947 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
948 response was received it would be used unchecked in a fail-DSN, violating
949 standards on line-length limits. Truncate if needed.
951 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
952 doesn't work. (Additionally add a new main config option to configure the
959 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
960 side, to decode a TLS 1.3 packet capture.
962 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
963 Previously the default library behaviour applied, sending two, each in
966 JH/03 Debug output for ACL now gives the config file name and line number for
969 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
971 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
973 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
974 buffer overrun for (non-chunking) other transports.
976 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
977 TLS1.3, means that a server rejecting a client certificate is not visible
978 to the client until the first read of encrypted data (typically the
979 response to EHLO). Add detection for that case and treat it as a failed
980 TLS connection attempt, so that the normal retry-in-clear can work (if
981 suitably configured).
983 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
984 and/or domain. Found and fixed by Jason Betts.
986 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
987 configuration). If a CNAME target was not a wellformed name pattern, a
990 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
991 the OS reports them interleaved with other addresses.
993 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
994 used both for input and for a verify callout, both encrypted, SMTP
995 responses being sent by the server could be lost. This resulted in
996 dropped connections and sometimes bounces generated by a peer sending
999 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1000 string. Previously it was possible to cause undefined behaviour in a
1001 library routine (usually a crash). Found by "zerons".
1003 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1006 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1007 API was removed, so update to use the newer ones.
1009 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1010 any timeout set, is taking a long time. Previously we would hang on to a
1011 rotated logfile "forever" if the input was arriving with long gaps
1012 (a previous attempt to fix addressed lack, for a long time, of initial
1015 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1016 shared (NFS) environment. The length of the tempfile name is now
1017 4 + 16 ("hdr.$message_exim_id") which might break on file
1018 systems which restrict the file name length to lower values.
1019 (It was "hdr.$pid".)
1021 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1022 shared (NFS) environment.
1024 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1025 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1028 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1029 on some platforms for bit 31.
1031 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1032 to changes apparently associated with TLS1.3 handling some of the APIs
1033 previously used were either nonfunctional or inappropriate. Strings
1034 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1035 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1036 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1037 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1038 and the use of specific cipher names in the encrypted= ACL condition.
1040 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1042 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1043 verification result was not updated unless hosts_require_ocsp applied.
1045 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1046 queue_list_requires_admin set to false, non-admin users were denied the
1049 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1050 directory-of-certs mode. Previously they were advertised despite the
1053 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1054 A single TCP connection by a client will now hold a TLS connection open
1055 for multiple message deliveries, by default. Previously the default was to
1058 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1059 default. If built with the facility, DANE will be used. The facility
1060 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1062 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1063 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1064 must be defined and you must still, unless you define DISABLE_TLS, manage
1065 the the include-dir and library-file requirements that go with that
1066 choice. Non-TLS builds are still supported.
1068 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1071 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1072 default. If the platform supports and has the facility enabled, it will
1073 be requested on all coneections.
1075 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1076 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1078 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1080 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1081 success-DSN messages. Previously the From: header was always the default
1082 one for these; the option was ignored.
1084 JH/28 Fix the timeout on smtp response to apply to the whole response.
1085 Previously it was reset for every read, so a teergrubing peer sending
1086 single bytes within the time limit could extend the connection for a
1087 long time. Credit to Qualsys Security Advisory Team for the discovery.
1089 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1090 delivery address, which leaked information of the results of local
1091 forwarding. Change to the original envelope recipient address, per
1094 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1095 requested. Previously not bounce was generated and a log entry of
1096 error ignored was made.
1098 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1100 JH/32 Introduce a general tainting mechanism for values read from the input
1101 channel, and values derived from them. Refuse to expand any tainted
1102 values, to catch one form of exploit.
1104 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1105 was unused and the unexpanded text used for the test. Found and
1106 fixed by Ruben Jenster.
1108 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1109 an attempt to use a TLS library read routine dereffed a nul pointer,
1112 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1113 them in our smtp response.
1115 JH/36 Have the general router option retry_use_local_part default to true when
1116 any of the restrictive preconditions are set (to anything). Previously it
1117 was only for check_local user. The change removes one item of manual
1118 configuration which is required for proper retries when a remote router
1119 handles a subset of addresses for a domain.
1121 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1122 link count into consideration.
1124 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1125 caused the extension of big_buffer, the following lines were ignored.
1127 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1128 accordance with RFC 2308. Previously there was no expiry, so a longlived
1129 receive process (eg. due to ACL delays) versus a short SOA value could
1132 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1134 JH/39 Promote DMARC support to mainline.
1136 JH/40 Bug 2452: Add a References: header to DSNs.
1138 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1139 parameters. The relevant library call is documented as "Deprecated: This
1140 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1141 3.6.0, DH parameters are negotiated following RFC7919."
1143 HS/06 Change the default of dnssec_request_domains to "*"
1145 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1146 carried on and emitted a BDAT command, even when PIPELINING was not
1149 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1150 buffer was used for the filename, resulting in a trap when tainted
1151 arguments (eg. $domain) were used.
1153 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1154 recommended to avoid a possible server-load attack. The feature can be
1155 re-enabled via the openssl_options main cofiguration option.
1157 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1158 for version 4.90 - adding a "more data" boolean to the arguments.
1159 Bumped the ABI version number also, this having been missed previously;
1160 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1161 respect of usage of smtp_printf() by either local_scan code or libraries
1162 accessed via the ${dlfunc } expansion item. Both will need coding
1163 adjustment for any calls to smtp_printf() to match the new function
1164 signature; a FALSE value for the new argument is always safe.
1166 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1167 the file-offset (which the Linux syscall does, and exim expects); this
1168 resulted in an indefinite loop.
1170 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1171 to do ARC verification. The Authentication-Results: header line added
1172 by the configuration then had no ARC item.
1174 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1175 an incorrect mode was used for reading the result, resulting in it being
1182 JH/01 Remove code calling the customisable local_scan function, unless a new
1183 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1185 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1186 non-signal-safe functions being used.
1188 JH/03 Bug 2269: When presented with a received message having a stupidly large
1189 number of DKIM-Signature headers, disable DKIM verification to avoid
1190 a resource-consumption attack. The limit is set at twenty.
1192 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1193 report of oldest_pass in ${authres } in consequence, and separate out
1194 some descriptions of reasons for verification fail.
1196 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1197 files in the spool were present and unlocked. A queue-runner could spot
1198 them, resulting in a duplicate delivery. Fix that by doing the unlock
1199 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1200 add more error-checking on spoolfile handling while that code is being
1203 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1204 No known attacks, no CVE, this is defensive hardening.
1206 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1207 a queue-runner could start a delivery while other operations were ongoing.
1208 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1209 Found and investigated by Tim Stewart. Fix by using the open message data
1210 file handle rather than opening another, and not locally closing it (which
1211 releases a lock) for that case, while creating the temporary .eml format
1212 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1214 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1215 $sender_verify_failure/$recipient_verify_failure to "random".
1217 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1220 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1221 Previously this would segfault.
1223 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1226 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1227 like zero, since the resolver should be doing this for us, But we need one
1228 as a CNAME but no MX presence gets the CNAME returned; we need to check
1229 that doesn't point to an MX to declare it "no MX returned" rather than
1230 "error, loop". A new main option is added so the older capability of
1231 following some limited number of chain links is maintained.
1233 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1235 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1236 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1237 now-deprecated earlier definitions used only specified the range up to TLS
1238 1.2 (in the older-version library docs).
1240 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1242 JH/15 Rework TLS client-side context management. Stop using a global, and
1243 explicitly pass a context around. This enables future use of TLS for
1244 connections to service-daemons (eg. malware scanning) while a client smtp
1245 connection is using TLS; with cutthrough connections this is quite likely.
1247 JH/16 Fix ARC verification to do AS checks in reverse order.
1249 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1251 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1252 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1253 Previously the "utf8" would be re-prepended for every additional message.
1255 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1256 Previously thery were accepted, resulting in issues when attempting to
1257 forward messages to a non-supporting MTA.
1259 PP/02 Let -n work with printing macros too, not just options.
1261 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1262 one parent address was copied, and bogus data was used at delivery-logging
1263 time. Either a crash (after delivery) or bogus log data could result.
1264 Discovery and analysis by Tim Stewart.
1266 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1267 Previously if the string ended mid-character, we did not insert the
1268 promised '?' replacement.
1270 PP/04 Documentation: current string operators work on bytes, not codepoints.
1272 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1273 should pack well giving a smaller memory footprint so better caching and
1274 therefore performance. Group the declarations where this can't be done so
1275 that the byte-sized flag variables are not interspersed among pointer
1276 variables, giving a better chance of good packing by the compiler.
1278 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1279 non-null, to avoid issues with sites running BATV. Previously reports were
1280 sent with an empty envelope sender so looked like bounces.
1282 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1283 The ignore_error flag wasn't being returned from the filter subprocess so
1284 was not set for later routers. Investigation and fix by Matthias Kurz.
1286 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1287 and a msg:complete for the whole, when a message is manually removed using
1288 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1290 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1291 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1292 hope that is portable enough.
1294 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1295 requiring a known-CA anchor certificate; make it now rely entirely on the
1296 TLSA as an anchor. Checking the name on the leaf cert against the name
1297 on the A-record for the host is still done for TA (but not for EE mode).
1299 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1300 included in delivery lines for non-proxied connections, when compiled with
1301 SUPPORT_SOCKS and running with proxy logging enabled.
1303 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1304 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1305 move the existing event to fire before the normal logging of message
1306 failure so that custom logging is bracketed by normal logging.
1308 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1309 msg:fail:internal event. Developement by Matthias Kurz.
1311 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1312 far too small for todays use of crypto signatures stored there. Go all
1313 the way to the max DNS message size of 64kB, even though this might be
1314 overmuch for IOT constrained device use.
1316 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1317 copy a string over itself. The library routine is documented as not
1318 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1320 JH/32 For main options check_spool_space and check_inode_space, where the
1321 platform supports 64b integers, support more than the previous 2^31 kB
1322 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1323 the previous G, M, k.
1325 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1326 $authenticated_fail_id variable on authentication failure. Previously
1329 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1330 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1331 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1332 GNUTLS_SEC_PARAM_MEDIUM.
1334 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1335 side. Previously we would continue as if no SNI had been received.
1337 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1338 "<" character, which should be a list-separator specification, we walked
1339 off past the nul-terimation.
1341 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1342 causes) even when the retry time is not yet met. Previously they were
1343 not, meaning that when (say) an account was over-quota and temp-rejecting,
1344 and multiple senders' messages were queued, only one sender would get
1345 notified on each configured delay_warning cycle.
1347 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1349 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1350 cipher-suites, an error can be left on the stack even for a succeeding
1351 accept; this results in impossible error messages when a later operation
1354 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1355 return error codes indicating retry. Under TLS1.3 this becomes required.
1357 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1358 it only wrote the new authenticators, resulting in a lack of tracking of
1359 peer changes of ESMTP extensions until the next cache flush.
1361 JH/41 Fix the loop reading a message header line to check for integer overflow,
1362 and more-often against header_maxsize. Previously a crafted message could
1363 induce a crash of the recive process; now the message is cleanly rejected.
1365 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1366 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1372 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1373 When redis_servers is set to a list of > 1 element, and the Redis servers
1374 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1375 case of MOVED into a DEFER case instead, thus moving the query onto the
1376 next server in the list. For a cluster of N elements, all N servers must
1377 be defined in redis_servers.
1379 GF/02 Catch and remove uninitialized value warning in exiqsumm
1380 Check for existence of @ARGV before looking at $ARGV[0]
1382 JH/01 Replace the store_release() internal interface with store_newblock(),
1383 which internalises the check required to safely use the old one, plus
1384 the allocate and data copy operations duplicated in both (!) of the
1385 extant use locations.
1387 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1388 modifier. This matches the restriction on the commandline.
1390 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1391 Previously only the last row was returned.
1393 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1394 we assumed that tags in the header were well-formed, and parsed the
1395 element content after inspecting only the first char of the tag.
1396 Assumptions at that stage could crash the receive process on malformed
1399 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1400 While running the DKIM ACL we operate on the Permanent memory pool so that
1401 variables created with "set" persist to the DATA ACL. Also (at any time)
1402 DNS lookups that fail create cache records using the Permanent pool. But
1403 expansions release any allocations made on the current pool - so a dnsdb
1404 lookup expansion done in the DKIM ACL releases the memory used for the
1405 DNS negative-cache, and bad things result. Solution is to switch to the
1406 Main pool for expansions.
1407 While we're in that code, add checks on the DNS cache during store_reset,
1408 active in the testsuite.
1409 Problem spotted, and debugging aided, by Wolfgang Breyha.
1411 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1412 When none of the hosts presented to a transport match an already-open
1413 connection, close it and proceed with the list. Previously we would
1414 queue the message. Spotted by Lena with Yahoo, probably involving
1417 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1418 Previously a spurious "250 OK id=" response was appended to the proper
1421 JH/08 The "support for" informational output now, which built with Content
1422 Scanning support, has a line for the malware scanner interfaces compiled
1423 in. Interface can be individually included or not at build time.
1425 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1426 by the template makefile "src/EDITME". The "STREAM" support for an older
1427 ClamAV interface method is removed.
1429 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1430 rows affected is given instead).
1432 JH/11 The runtime Berkeley DB library version is now additionally output by
1433 "exim -d -bV". Previously only the compile-time version was shown.
1435 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1436 SMTP connection. Previously, when one had more recipients than the
1437 first, an abortive onward connection was made. Move to full support for
1438 multiple onward connections in sequence, handling cutthrough connection
1439 for all multi-message initiating connections.
1441 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1442 routers. Previously, a multi-recipient message would fail to match the
1443 onward-connection opened for the first recipient, and cause its closure.
1445 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1446 a timeout on read on a GnuTLS initiating connection, resulting in the
1447 initiating connection being dropped. This mattered most when the callout
1448 was marked defer_ok. Fix to keep the two timeout-detection methods
1451 JH/15 Relax results from ACL control request to enable cutthrough, in
1452 unsupported situations, from error to silently (except under debug)
1453 ignoring. This covers use with PRDR, frozen messages, queue-only and
1456 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1458 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1459 metadata, resulting in a crash in free().
1461 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1462 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1463 Broken also in d185889f4, with init system revamp.
1465 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1466 Previously we abruptly closed the connection after reading a malware-
1467 found indication; now we go on to read the "scan ok" response line,
1470 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1471 ACL. Previously, a crash would result.
1473 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1474 macro text after a replacement (previously it was only once per line) and
1475 by skipping builtin macros when searching for an uppercase lead character.
1477 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1478 for the build is renamed.
1480 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1481 was allocated for every new TLS startup, meaning one per message. Fix
1482 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1484 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1485 reported the original. Fix to report (as far as possible) the ACL
1486 result replacing the original.
1488 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1489 OpenSSL. Certificate information is loaded for every new TLS startup,
1490 and the resources needed to be freed.
1492 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1494 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1497 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1498 DATA response info to the (existing) per-recipient response info for
1499 the "C=" log element. It can have useful tracking info from the
1500 destination system. Patch from Simon Arlott.
1502 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1503 length value. Previously this would segfault.
1505 HS/02 Support Avast multiline protoocol, this allows passing flags to
1506 newer versions of the scanner.
1508 JH/28 Ensure that variables possibly set during message acceptance are marked
1509 dead before release of memory in the daemon loop. This stops complaints
1510 about them when the debug_store option is enabled. Discovered specifically
1511 for sender_rate_period, but applies to a whole set of variables.
1512 Do the same for the queue-runner and queue-list loops, for variables set
1513 from spool message files. Do the same for the SMTP per-message loop, for
1514 certain variables indirectly set in ACL operations.
1516 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1517 as a multi-recipient message from a mailinglist manager). The coding had
1518 an arbitrary cutoff number of characters while checking for more input;
1519 enforced by writing a NUL into the buffer. This corrupted long / fast
1520 input. The problem was exposed more widely when more pipelineing of SMTP
1521 responses was introduced, and one Exim system was feeding another.
1522 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1523 receiving system, and refused recipients seen by the sending system
1524 (propating to people being dropped from mailing lists).
1525 Discovered and pinpointed by David Carter.
1527 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1528 replaced by the ${authresults } expansion.
1530 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1532 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1533 allows proper process termination in container environments.
1535 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1536 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1538 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1539 and "err_perm", deprecated since 4.83 when the RFC-defined words
1540 "temperror" and "permerror" were introduced.
1542 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1543 transport-filters or DKIM-signing. The restriction was lost in the
1544 consolidation of verify-callout and delivery SMTP handling.
1545 Extend the restriction to also cover ARC-signing.
1547 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1548 in defer=pass mode supply a 450 to the initiator. Previously the message
1551 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1552 tls_require_ciphers is used as before.
1554 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1555 "pass_unscanned". Only tmpfails from the scanner are written to
1556 the paniclog, as they may require admin intervention (permission
1557 denied, license issues). Other scanner errors (like decompression
1558 bombs) do not cause a paniclog entry.
1560 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1561 Previously it was possible to log spurious information in receive log
1564 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1565 triggered odd behaviour from Outlook Express clients.
1567 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1570 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1571 since the IETF WG has not yet settled on that versus the original
1572 "bare" representation.
1574 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1575 Previously the millisecond value corrupted the output.
1576 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1577 corrupted the output.
1583 JH/01 Rework error string handling in TLS interface so that the caller in
1584 more cases is responsible for logging. This permits library-sourced
1585 string to be attached to addresses during delivery, and collapses
1586 pairs of long lines into single ones.
1588 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1589 during configuration. Wildcards are allowed and expanded.
1591 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1592 This permits better logging.
1594 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1595 do not close it down and have the child transport start it up again on
1596 the passed-on TCP connection. Instead, proxy the child (and any
1597 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1598 affected: the continued delivery log lines do not have any DNSSEC, TLS
1599 Certificate or OCSP information. TLS cipher information is still logged.
1601 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1602 identical IP addresses on different listening ports. Will also affect
1605 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1606 add noisy ifdef guards to special-case this sillyness.
1607 Patch from Bernd Kuhls.
1609 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1610 than 255 are no longer allowed.
1612 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1613 Disable the session-cache too, which might reduce our load. Since we
1614 currrectly use a new context for every connection, both as server and
1615 client, there is no benefit for these.
1616 GnuTLS appears to not support tickets server-side by default (we don't
1617 call gnutls_session_ticket_enable_server()) but client side is enabled
1618 by default on recent versions (3.1.3 +) unless the PFS priority string
1621 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1622 <https://reproducible-builds.org/specs/source-date-epoch/>.
1624 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1625 the check for any unsuccessful recipients did not notice the limit, and
1626 erroneously found still-pending ones.
1628 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1629 MSG_MORE. Only in-clear (not on TLS connections).
1631 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1632 transport-filter is involved we can buffer the headers in memory for
1633 creating the signature, and read the spool data file once for the
1634 signature and again for transmission.
1636 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1637 4.77 as the kernel support then wasn't solid, having issues in 64bit
1638 mode. Now, it's been long enough. Add support for FreeBSD also.
1640 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1641 case where the routing stage had gathered several addresses to send to
1642 a host before calling the transport for the first, we previously failed
1643 to close down TLS in the old transport process before passing the TCP
1644 connection to the new process. The new one sent a STARTTLS command
1645 which naturally failed, giving a failed delivery and bloating the retry
1646 database. Investigation and fix prototype from Wolfgang Breyha.
1648 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1649 false-negatives in the check that the sender had not preempted a response
1650 or prompt from Exim (running as a server), due to that code's lack of
1651 awareness of the SMTP input buffering.
1653 PP/04 Add commandline_checks_require_admin option.
1654 Exim drops privileges sanely, various checks such as -be aren't a
1655 security problem, as long as you trust local users with access to their
1656 own account. When invoked by services which pass untrusted data to
1657 Exim, this might be an issue. Set this option in main configuration
1658 AND make fixes to the calling application, such as using `--` to stop
1661 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1662 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1663 responses to those, into a single TLS record each way (this usually means
1664 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1667 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1668 affects you only if you're dancing at the edge of the param size limits.
1669 If you are, and this message makes sense to you, then: raise the
1670 configured limit or use OpenSSL 1.1. Nothing we can do for older
1673 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1674 cmdline element to get the documented default one. Previously it was
1677 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1678 are unsuable for non-message-specific reasons - eg. connection timeout,
1679 banner-time rejection.
1681 JH/16 Fix logging of delivery remote port, when specified by router, under
1684 PP/06 Repair manualroute's ability to take options in any order, even if one
1685 is the name of a transport.
1688 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1690 JH/17 Change the list-building routines interface to use the expanding-string
1691 triplet model, for better allocation and copying behaviour.
1693 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1694 Previously it was constructed the first time a possibly-matching string
1695 was met in the configuration file input during startup; now it is done
1698 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1699 compatible one, to avoid the (poorly documented) possibility of a config
1700 file in the working directory redirecting the DB files, possibly correpting
1701 some existing file. CVE-2017-10140 assigned for BDB.
1703 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1704 cache-hot. Previously, although the result was properly cached, the
1705 initial verify call returned a defer.
1707 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1708 the main verify for receipient in uncached-mode.
1710 JH/22 Retire historical build files to an "unsupported" subdir. These are
1711 defined as "ones for which we have no current evidence of testing".
1713 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1714 if present. Previously it was ignored.
1716 JH/24 Start using specified-initialisers in C structure init coding. This is
1717 a C99 feature (it's 2017, so now considered safe).
1719 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1720 if was a fixed-sized field and bitmask ops via macros; it is now more
1723 PP/07 GitHub PR 56: Apply MariaDB build fix.
1724 Patch provided by Jaroslav Å karvada.
1726 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1727 during Coverity cleanups [4.87 JH/47]
1728 Diagnosis and fix provided by Michael Fischer v. Mollard.
1730 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1731 the right size to place the terminating semicolon on its own folded
1732 line, the header hash was calculated to an incorrect value thanks to
1733 the (relaxed) space the fold became.
1735 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1736 and confused the parent.
1738 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1739 which could crash as a result. This could lead to undeliverable messages.
1741 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1744 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1745 matters on fast-turnover and PID-randomising systems, which were getting
1746 out-of-order delivery.
1748 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1749 a possibly-overlapping copy. The symptom was that "Remote host closed
1750 connection in response to HELO" was logged instead of the actual 4xx
1753 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1754 Previously only that bufferd was discarded, resulting in SYMTP command
1757 JH/32 DKIM: when a message has multiple signatures matching an identity given
1758 in dkim_verify_signers, run the dkim acl once for each. Previously only
1759 one run was done. Bug 2189.
1761 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1762 "panic the current process" to "deliberately defer". The panic log is
1763 still written with the problem list name; the mail and reject logs now
1764 get a temp-reject line for the message that was being handled, saying
1765 something like "domains check lookup or other defer". The SMTP 451
1766 message is still "Temporary local problem".
1768 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1769 A crafted sequence of BDAT commands could result in in-use memory beeing
1770 freed. CVE-2017-16943.
1772 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1773 from SMTP input. Previously it was always done; now only done for DATA
1774 and not BDAT commands. CVE-2017-16944.
1776 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1777 to the message (such as an overlong header line). Previously this was
1778 not done and we did not exit BDAT mode. Followon from the previous item
1779 though a different problem.
1785 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1786 than -2003 did; needs libidn2 in addition to libidn.
1788 JH/02 The path option on a pipe transport is now expanded before use.
1790 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1791 Patch provided by "Björn", documentation fix added too.
1793 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1794 missing a wire-to-host endian conversion.
1796 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1797 close after a BDAT command line could be taken as a following command,
1798 giving a synch failure. Fix by only checking for synch immediately
1799 before acknowledging the chunk.
1801 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1802 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1803 macro. Patches provided by Josh Soref.
1805 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1806 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1807 by IANA as a service extension. However, John Klensin suggests that we
1810 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1811 the dkim code may be unix-mode line endings rather than smtp wire-format
1812 CRLF, so prepend a CR to any bare LF.
1814 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1815 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1817 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1818 the first were themselves being wrongly included in the feed into dkim
1819 processing; with most chunk sizes in use this resulted in an incorrect
1820 body hash calculated value.
1822 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1823 DKIM signature block, for verification. Although advised against by
1824 standards it is specifically not ruled illegal.
1826 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1828 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1829 missing a body hash (the bh= tag).
1831 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1832 It seems that HAProxy sends the Proxy Protocol information in clear and
1833 only then does a TLS startup, so do the same.
1835 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1836 TCP connections (such as for Spamd) unless the daemon successfully set
1837 Fast Open mode on its listening sockets. This fixes breakage seen on
1838 too-old kernels or those not configured for Fast Open, at the cost of
1839 requiring both directions being enabled for TFO, and TFO never being used
1840 by non-daemon-related Exim processes.
1842 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1843 endings, at least on the first header line. Try to canonify any that get
1844 past that check, despite the cost.
1846 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1847 now limited to an arbitrary five deep, while parsing addresses with the
1848 strip_excess_angle_brackets option enabled.
1850 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1851 instead leave the unprompted TLS handshake in socket buffer for the
1852 TLS library to consume.
1854 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1856 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1858 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1859 region in one operation, for speed, and this leaves assigned pointers
1860 dangling. Add checks run only under the testsuite which checks all
1861 variables at a store-reset and panics on a dangling pointer; add code
1862 explicitly nulling out all the variables discovered. Fixes one known
1863 bug: a transport crash, where a dangling pointer for $sending_ip_address
1864 originally assigned in a verify callout, is re-used.
1866 PP/06 Drop '.' from @INC in various Perl scripts.
1868 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1870 PP/08 Reduce a number of compilation warnings under clang; building with
1871 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1872 should be warning-free.
1874 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1876 HS/01 Fix portability problems introduced by PP/08 for platforms where
1877 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1879 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1880 chunk. This allows us to accept broken chunked messages. We need a more
1881 general solution here.
1883 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1884 already-broken messages in the queue.
1886 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1888 JH/19 Fix reference counting bug in routing-generated-address tracking.
1894 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1895 supports it and a size is available (ie. the sending peer gave us one).
1897 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1898 years of being deprecated). The replacements are the ACLs
1899 acl_smtp_mime and acl_not_smtp_mime.
1901 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1902 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1903 or even an in-clear connection were permitted. Now, if the host lookup
1904 was dnssec and dane was requested then the host is only used if the
1905 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1906 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1907 if one fails this test.
1908 This means that a poorly-configured remote DNS will make it incommunicado;
1909 but it protects against a DNS-interception attack on it.
1911 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1912 non-noisy when a race steals the message being considered.
1914 JH/05 If main configuration option tls_certificate is unset, generate a
1915 self-signed certificate for inbound TLS connections.
1917 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1918 in rewrites and routers.
1920 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1921 and logged a warning sing 4.83; now they are a configuration file error.
1923 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1924 (lacking @domain). Apply the same qualification processing as RCPT.
1926 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1928 JH/10 Support ${sha256:} applied to a string (as well as the previous
1931 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1932 a cutthrough deliver is pending, as we always want to make a connection.
1933 This also avoids re-routing the message when later placing the cutthrough
1934 connection after a verify cache hit.
1935 Do not update it with the verify result either.
1937 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1938 when routing results in more than one destination address.
1940 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1941 signing (which inhibits the cutthrough capability). Previously only
1942 the presence of an option was tested; now an expansion evaluating as
1943 empty is permissible (obviously it should depend only on data available
1944 when the cutthrough connection is made).
1946 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1947 the relevant preceding SMTP command did not note the pipelining mode.
1949 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1950 Previously they were not counted.
1952 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1953 as one having no matching records. Previously we deferred the message
1954 that needed the lookup.
1956 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1957 distinguished as "(=".
1959 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1960 for missing MX records. Previously it only worked for missing A records.
1962 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1964 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1965 after the data-go-ahead and data-ack. Patch from Jason Betts.
1967 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1968 even for a "none" policy. Patch from Tony Meyer.
1970 JH/22 Fix continued use of a connection for further deliveries. If a port was
1971 specified by a router, it must also match for the delivery to be
1974 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1975 When one of the recipients of a message was unsuitable for the connection
1976 (has no matching addresses), we lost track of needing to mark it
1977 deferred. As a result mail would be lost.
1979 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1981 JH/25 Decoding ACL controls is now done using a binary search; the source code
1982 takes up less space and should be simpler to maintain. Merge the ACL
1983 condition decode tables also, with similar effect.
1985 JH/26 Fix problem with one_time used on a redirect router which returned the
1986 parent address unchanged. A retry would see the parent address marked as
1987 delivered, so not attempt the (identical) child. As a result mail would
1990 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1991 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1992 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1995 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1996 Main config options check_{log,spool}_{inodes,space} are now
1997 100 inodes, 10MB unless set otherwise in the configuration.
1999 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2000 Previously it only applied to the main-section connection policy
2003 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2005 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2006 by me. Added RFC7919 DH primes as an alternative.
2008 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2009 are not in the system include path.
2011 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2012 GnuTLS, when a session startup failed (eg because the client disconnected)
2013 Exim did stdio operations after fclose. This was exposed by a recent
2014 change which nulled out the file handle after the fclose.
2016 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2017 signed directly by the cert-signing cert, rather than an intermediate
2018 OCSP-signing cert. This is the model used by LetsEncrypt.
2020 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2022 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2023 an incoming connection.
2025 HS/02 Bug 1802: Do not half-close the connection after sending a request
2028 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2029 fallback to "prime256v1".
2031 JH/34 SECURITY: Use proper copy of DATA command in error message.
2032 Could leak key material. Remotely exploitable. CVE-2016-9963.
2038 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2039 and 3.4.4 - once the server is enabled to respond to an OCSP request
2040 it does even when not requested, resulting in a stapling non-aware
2041 client dropping the TLS connection.
2043 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2044 support variable-length bit vectors. No functional change.
2046 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2047 The I= interface field on outgoing lines is now after the H= remote
2048 host field, same as incoming lines. There is a separate
2049 outgoing_interface log selector which allows you to disable the
2052 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2053 If not running log_selector +smtp_connection the mainlog would be held
2054 open indefinitely after a "too many connections" event, including to a
2055 deleted file after a log rotate. Leave the per net connection logging
2056 leaving it open for efficiency as that will be quickly detected by the
2057 check on the next write.
2059 HS/01 Bug 1671: Fix post transport crash.
2060 Processing the wait-<transport> messages could crash the delivery
2061 process if the message IDs didn't exist for some reason. When
2062 using 'split_spool_directory=yes' the construction of the spool
2063 file name failed already, exposing the same netto behaviour.
2065 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2066 mime_regex ACL conditions.
2068 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2069 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2070 to HELO, local diagnostic string.
2072 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2073 log line to debug. Even when configured with a tls authenticator many
2074 client connections are expected to not authenticate in this way, so
2075 an authenticate fail is not an error.
2077 HS/02 Add the Exim version string to the process info. This way exiwhat
2078 gives some more detail about the running daemon.
2080 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2081 matter for fast-change records such as DNSBLs.
2083 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2084 retry record, even if constant. There may be multiple transports with
2085 different interface settings and the retry behaviour needs to be kept
2088 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2090 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2092 JH/10 Bug 840: fix log_defer_output option of pipe transport
2094 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2095 hosts_randomize. This matters a lot when combined with mua_wrapper.
2097 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2098 ${quote_pgsql:<string>} operator.
2100 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2102 JH/14 Change header file name for freeradius-client. Relevant if compiling
2103 with Radius support; from the Gentoo tree and checked under Fedora.
2105 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2107 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2108 option transport_filter, meaning no filtering.
2110 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2112 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2113 defaults to "*" (all hosts). The variable is now available when not built
2114 with TLS, default unset, mainly to enable keeping the testsuite sane.
2115 If a server certificate is not supplied (via tls_certificate) an error is
2116 logged, and clients will find TLS connections fail on startup. Presumably
2117 they will retry in-clear.
2118 Packagers of Exim are strongly encouraged to create a server certificate
2119 at installation time.
2121 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2122 with the $config_file variable.
2124 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2125 in transport context, after the attempt, and per-recipient. The latter type
2126 is per host attempted. The event data is the error message, and the errno
2127 information encodes the lookup type (A vs. MX) used for the (first) host,
2128 and the trailing two digits of the smtp 4xx response.
2130 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2131 to write to mainlog (or rejectlog, paniclog) in the window between file
2132 creation and permissions/ownership being changed. Particularly affects
2133 installations where exicyclog is run as root, rather than exim user;
2134 result is that the running daemon panics and dies.
2136 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2138 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2139 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2140 "pri" and "weight". Note that the previous implicit priority given by the
2141 list order is no longer honoured.
2143 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2144 for DKIM processing.
2146 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2147 by defining SUPPORT_SOCKS.
2149 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2150 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2151 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2152 variables are renamed to proxy_{local,external}_{address,port}.
2154 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2155 for a build by defining SUPPORT_I18N
2157 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2158 of the query string, and make ${quote_redis:} do that quoting.
2160 JH/29 Move Events support from Experimental to mainline, enabled by default
2161 and removable for a build by defining DISABLE_EVENT.
2163 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2165 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2166 cached by the daemon.
2168 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2169 by defining LOOKUP_REDIS. The libhiredis library is required.
2171 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2172 keys are given for lookup.
2174 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2175 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2176 only supported when built with TLS support. The PolarSSL SHA routines
2177 are still used when the TLS library is too old for convenient support.
2179 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2180 openssl_options), for security. OpenSSL forces this from version 1.1.0
2181 server-side so match that on older versions.
2183 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2184 allocation for $value could be released as the expansion processing
2185 concluded, but leaving the global pointer active for it.
2187 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2188 and to use the domains and local_parts ACL conditions.
2190 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2191 incorrectly not doubled on cutthrough transmission, hence seen as a
2192 body-termination at the receiving system - resulting in truncated mails.
2193 Commonly the sender saw a TCP-level error, and retransmitted the message
2194 via the normal store-and-forward channel. This could result in duplicates
2195 received - but deduplicating mailstores were liable to retain only the
2196 initial truncated version.
2198 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2200 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2202 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2203 we're in there, support oversigning also; bug 1309.
2205 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2207 HS/04 Add support for keep_environment and add_environment options.
2209 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2210 either intentional arithmetic overflow during PRNG, or testing config-
2213 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2214 delivery resulted in actual delivery. Cancel cutthrough before DATA
2217 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2218 rejects a recipient: pass the reject to the originator.
2220 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2221 Many were false-positives and ignorable, but it's worth fixing the
2224 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2225 for the new environment-manipulation done at startup. Move the routines
2226 from being local to tls.c to being global via the os.c file.
2228 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2229 an extract embedded as result-arg for a map, the first arg for extract
2230 is unavailable so we cannot tell if this is a numbered or keyed
2231 extraction. Accept either.
2237 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2240 JH/02 The smtp transport option "multi_domain" is now expanded.
2242 JH/03 The smtp transport now requests PRDR by default, if the server offers
2245 JH/04 Certificate name checking on server certificates, when exim is a client,
2246 is now done by default. The transport option tls_verify_cert_hostnames
2247 can be used to disable this per-host. The build option
2248 EXPERIMENTAL_CERTNAMES is withdrawn.
2250 JH/05 The value of the tls_verify_certificates smtp transport and main options
2251 default to the word "system" to access the system default CA bundle.
2252 For GnuTLS, only version 3.0.20 or later.
2254 JH/06 Verification of the server certificate for a TLS connection is now tried
2255 (but not required) by default. The verification status is now logged by
2256 default, for both outbound TLS and client-certificate supplying inbound
2259 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2262 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2263 Status Notification (bounce) messages are now MIME format per RFC 3464.
2264 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2265 under the control of the dsn_advertise_hosts option, and routers may
2266 have a dsn_lasthop option.
2268 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2269 default, modifiable by a malware= option. The list separator for
2270 the options can now be changed in the usual way. Bug 68.
2272 JH/10 The smtp_receive_timeout main option is now expanded before use.
2274 JH/11 The incoming_interface log option now also enables logging of the
2275 local interface on delivery outgoing connections.
2277 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2278 if the interface and destination host and port all match.
2280 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2283 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2284 Patch from Andrew Lewis.
2286 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2287 now supports optional time-restrictions, weighting, and priority
2288 modifiers per server. Patch originally by <rommer@active.by>.
2290 JH/16 The spamd_address main option now supports a mixed list of local
2291 and remote servers. Remote servers can be IPv6 addresses, and
2292 specify a port-range.
2294 JH/17 Bug 68: The spamd_address main option now supports an optional
2295 timeout value per server.
2297 JH/18 Bug 1581: Router and transport options headers_add/remove can
2298 now have the list separator specified.
2300 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2303 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2306 JH/21 Support for the A6 type of dns record is withdrawn.
2308 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2309 rather than the verbs used.
2311 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2312 from 255 to 1024 chars.
2314 JH/24 Verification callouts now attempt to use TLS by default.
2316 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2317 are generic router options now. The defaults didn't change.
2319 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2320 Original patch from Alexander Shikoff, worked over by JH.
2322 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2323 files if ZCAT_COMMAND is not executable.
2325 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2327 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2329 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2330 Normally benign, it bites when the pair was led to by a CNAME;
2331 modern usage is to not canonicalize the domain to a CNAME target
2332 (and we were inconsistent anyway for A-only vs AAAA+A).
2334 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2336 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2337 when evaluating $sender_host_dnssec.
2339 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2340 $sender_helo_dnssec variable.
2342 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2344 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2346 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2348 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2349 documented as working, but never had. Support all but $spam_report.
2351 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2352 added for tls authenticator.
2354 HS/03 Add perl_taintmode main config option
2360 TL/01 When running the test suite, the README says that variables such as
2361 no_msglog_check are global and can be placed anywhere in a specific
2362 test's script, however it was observed that placement needed to be near
2363 the beginning for it to behave that way. Changed the runtest perl
2364 script to read through the entire script once to detect and set these
2365 variables, reset to the beginning of the script, and then run through
2366 the script parsing/test process like normal.
2368 TL/02 The BSD's have an arc4random API. One of the functions to induce
2369 adding randomness was arc4random_stir(), but it has been removed in
2370 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2371 function when detected.
2373 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2374 cause callback expansion.
2376 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2377 syntax errors in an expansion can be treated as a string instead of
2378 logging or causing an error, due to the internal use of bool_lax
2379 instead of bool when processing it.
2381 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2382 server certificates when making smtp deliveries.
2384 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2386 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2388 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2390 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2391 Merged patch from Sebastian Wiedenroth.
2393 JH/05 Fix results-pipe from transport process. Several recipients, combined
2394 with certificate use, exposed issues where response data items split
2395 over buffer boundaries were not parsed properly. This eventually
2396 resulted in duplicates being sent. This issue only became common enough
2397 to notice due to the introduction of connection certificate information,
2398 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2400 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2401 size buffer was used, resulting in syntax errors when an expansion
2404 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2405 version 3.3.6 or later.
2407 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2408 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2409 both become "event_action", the variables become $event_name, $event_data
2410 and $event_defer_errno. There is a new variable $verify_mode, usable in
2411 routers, transports and related events. The tls:cert event is now also
2412 raised for inbound connections, if the main configuration event_action
2415 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2416 early OCSP support, but no stapling (appears to be less than 1.0.0).
2418 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2419 server certificate names available under the smtp transport option
2420 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2423 JH/10 Time-related extraction expansions from certificates now use the main
2424 option "timezone" setting for output formatting, and are consistent
2425 between OpenSSL and GnuTLS compilations. Bug 1541.
2427 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2428 encoded parameter in the incoming message. Bug 1558.
2430 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2431 include certificate info, eximon was claiming there were spoolfile
2434 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2436 JH/14 Log delivery-related information more consistently, using the sequence
2437 "H=<name> [<ip>]" wherever possible.
2439 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2440 are problematic for Debian distribution, omit them from the release
2443 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2445 JH/16 Fix string representation of time values on 64bit time_t architectures.
2448 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2449 output list separator was used.
2454 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2455 checkers that were complaining about end of non-void function with no
2458 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2459 This was a regression introduced in 4.83 by another bugfix.
2461 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2463 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2464 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2470 TF/01 Correctly close the server side of TLS when forking for delivery.
2472 When a message was received over SMTP with TLS, Exim failed to clear up
2473 the incoming connection properly after forking off the child process to
2474 deliver the message. In some situations the subsequent outgoing
2475 delivery connection happened to have the same fd number as the incoming
2476 connection previously had. Exim would try to use TLS and fail, logging
2477 a "Bad file descriptor" error.
2479 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2480 utilities have not been installed.
2482 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2483 temporary space as the ACL may create new global variables.
2485 TL/01 LDAP support uses per connection or global context settings, depending
2486 upon the detected version of the libraries at build time.
2488 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2489 to extract and use the src ip:port in logging and expansions as if it
2490 were a direct connection from the outside internet. PPv2 support was
2491 updated based on HAProxy spec change in May 2014.
2493 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2495 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2496 Properly escape header and check for NULL return.
2498 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2501 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2503 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2504 characters in header names, implemented as a verify condition.
2505 Contributed by Michael Fischer v. Mollard.
2507 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2508 results permerror and temperror. Previous values are deprecated but
2509 still accepted. In a future release, err_perm and err_temp will be
2510 completely removed, which will be a backward incompatibility if the
2511 ACL tests for either of these two old results. Patch contributed by
2512 user bes-internal on the mailing list.
2514 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2516 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2517 selectors, in both main and reject logs.
2519 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2522 JH/07 Add malware type "sock" for talking to simple daemon.
2524 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2526 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2527 routers/transports under cutthrough routing.
2529 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2530 numbers. Touch up "bool" conditional to keep the same definition.
2532 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2534 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2536 JH/12 Expand items in router/transport headers_add or headers_remove lists
2537 individually rather than the list as a whole. Bug 1452.
2539 Required for reasonable handling of multiple headers_ options when
2540 they may be empty; requires that headers_remove items with embedded
2541 colons must have them doubled (or the list-separator changed).
2543 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2544 view the policy declared in the DMARC record. Currently, $dmarc_status
2545 is a combined value of both the record presence and the result of the
2548 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2550 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2551 dnslookup router and the smtp transport (applying to the forward
2554 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2555 of ldap servers used for a specific lookup. Patch provided by Heiko
2558 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2559 New variable $lookup_dnssec_authenticated for observability.
2561 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2562 Patch submitted by Lars Timman.
2564 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2566 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2567 Requires trusted mode and valid format message id, aborts otherwise.
2568 Patch contributed by Heiko Schlichting.
2570 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2571 certextract with support for various fields. Bug 1358.
2573 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2574 is requested by default, modifiable by smtp transport option
2577 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2578 operate on certificate variables to give certificate fingerprints
2579 Also new ${sha256:cert_variable}.
2581 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2583 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2584 Christian Aistleitner.
2586 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2588 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2589 file. Patch from Wolfgang Breyha.
2591 JH/25 Expand the coverage of the delivery $host and $host_address to
2592 client authenticators run in verify callout. Bug 1476.
2594 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2595 align with daemon_smtp_ports. Bug 72.
2597 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2598 support and error reporting did not work properly.
2600 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2601 and is readable. Patch from Andrew Colin Kissa.
2603 TL/14 Enhance documentation of ${run expansion and how it parses the
2604 commandline after expansion, particularly in the case when an
2605 unquoted variable expansion results in an empty value.
2607 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2609 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2610 by renaming away from it. Addresses GH issue 15, reported by
2613 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2615 TL/15 SECURITY: prevent double expansion in math comparison functions
2616 (can expand unsanitized data). Not remotely exploitable.
2623 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2625 PP/02 Make -n do something, by making it not do something.
2626 When combined with -bP, the name of an option is not output.
2628 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2631 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2632 $sender_host_name and config options to manage this, and basic check
2635 PP/05 DSCP support for outbound connections and control modifier for inbound.
2637 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2638 (Only plugin which currently uses this is kerberos4, which nobody should
2639 be using, but we should make it available and other future plugins might
2640 conceivably use it, even though it would break NAT; stuff *should* be
2641 using channel bindings instead).
2643 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2644 name; added for Sendmail compatibility; requires admin caller.
2645 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2646 just ignore it); requires trusted caller.
2647 Also parse but ignore: -Ac -Am -X<logfile>
2650 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2652 TL/02 Add +smtp_confirmation as a default logging option.
2654 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2655 Patch by Magnus Holmgren from 2007-02-20.
2657 TL/04 Bugzilla 1281 - Spec typo.
2658 Bugzilla 1283 - Spec typo.
2659 Bugzilla 1290 - Spec grammar fixes.
2661 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2663 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2665 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2666 mailing list by by Dmitry Isaikin.
2668 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2670 JH/02 Support "G" suffix to numbers in ${if comparisons.
2672 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2674 NM/01 Bugzilla 1197 - Spec typo
2675 Bugzilla 1196 - Spec examples corrections
2677 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2679 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2680 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2683 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2684 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2686 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2687 "acl {{name}{arg}...}", and optional args on acl condition
2690 JH/05 Permit multiple router/transport headers_add/remove lines.
2692 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2694 JH/07 Avoid using a waiting database for a single-message-only transport.
2695 Performance patch from Paul Fisher. Bugzilla 1262.
2697 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2700 JH/09 Add $headers_added variable, with content from use of ACL modifier
2701 add_header (but not yet added to the message). Bugzilla 199.
2703 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2704 Pulled from Bugzilla 817 by Wolfgang Breyha.
2706 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2708 (nb: this is the same fix as in Exim 4.80.1)
2710 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2713 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2716 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2718 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2719 advertise SMTP AUTH mechanism to us, instead of a generic
2720 protocol violation error. Also, make Exim more robust to bad
2721 data from the Dovecot auth socket.
2723 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2725 When a queue runner is handling a message, Exim first routes the
2726 recipient addresses, during which it prunes them based on the retry
2727 hints database. After that it attempts to deliver the message to
2728 any remaining recipients. It then updates the hints database using
2731 So if a recipient address works intermittently, it can get repeatedly
2732 deferred at routing time. The retry hints record remains fresh so the
2733 address never reaches the final cutoff time.
2735 This is a fairly common occurrence when a user is bumping up against
2736 their storage quota. Exim had some logic in its local delivery code
2737 to deal with this. However it did not apply to per-recipient defers
2738 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2740 This change adds a proper retry rule check during routing so that the
2741 final cutoff time is checked against the message's age. We only do
2742 this check if there is an address retry record and there is not a
2743 domain retry record; this implies that previous attempts to handle
2744 the address had the retry_use_local_parts option turned on. We use
2745 this as an approximation for the destination being like a local
2746 delivery, as in LMTP.
2748 I suspect this new check makes the old local delivery cutoff check
2749 redundant, but I have not verified this so I left the code in place.
2751 TF/02 Correct gecos expansion when From: is a prefix of the username.
2753 Test 0254 submits a message to Exim with the header
2757 When I ran the test suite under the user fanf2, Exim expanded
2758 the header to contain my full name, whereas it should have added
2759 a Resent-Sender: header. It erroneously treats any prefix of the
2760 username as equal to the username.
2762 This change corrects that bug.
2764 GF/01 DCC debug and logging tidyup
2765 Error conditions log to paniclog rather than rejectlog.
2766 Debug lines prefixed by "DCC: " to remove any ambiguity.
2768 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2770 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2771 Bug spotted by Jeremy Harris; was flawed since initial commit.
2772 Would have resulted in OCSP responses post-SNI triggering an Exim
2773 NULL dereference and crash.
2775 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2777 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2778 Bug detection, analysis and fix by Samuel Thibault.
2779 Bugzilla 1331, Debian bug #698092.
2781 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2783 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2784 Server implementation by Todd Lyons, client by JH.
2785 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2786 config variable "prdr_enable" controls whether the server
2787 advertises the facility. If the client requests PRDR a new
2788 acl_data_smtp_prdr ACL is called once for each recipient, after
2789 the body content is received and before the acl_smtp_data ACL.
2790 The client is controlled by both of: a hosts_try_prdr option
2791 on the smtp transport, and the server advertisement.
2792 Default client logging of deliveries and rejections involving
2793 PRDR are flagged with the string "PRDR".
2795 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2796 fclose(). Diagnosis by Todd Lyons.
2798 PP/17 Update configure.default to handle IPv6 localhost better.
2799 Patch by Alain Williams (plus minor tweaks).
2802 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2803 This is now consistent with GnuTLS, and is now documented: the
2804 previous undocumented portable approach to treating the option as
2805 unset was to force an expansion failure. That still works, and
2806 an empty string is now equivalent.
2808 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2809 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2810 not performing validation itself.
2812 PP/20 Added force_command boolean option to pipe transport.
2813 Patch from Nick Koston, of cPanel Inc.
2815 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2818 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2820 PP/21 Fix eximon continuous updating with timestamped log-files.
2821 Broken in a format-string cleanup in 4.80, missed when I repaired the
2822 other false fix of the same issue.
2823 Report and fix from Heiko Schlichting.
2826 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2827 Report from Prashanth Katuri.
2829 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2830 It's SecureTransport, so affects any MacOS clients which use the
2831 system-integrated TLS libraries, including email clients.
2833 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2834 using a MIME ACL for non-SMTP local injection.
2835 Report and assistance in diagnosis by Warren Baker.
2837 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2839 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2841 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2842 last id that failed so it may be referenced in subsequent ACL's.
2844 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2847 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2848 ldap library initialization, allowing self-signed CA's to be
2849 used. Also properly sets require_cert option later in code by
2850 using NULL (global ldap config) instead of ldap handle (per
2851 session). Bug diagnosis and testing by alxgomz.
2853 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2854 the src/util/ subdirectory.
2856 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2857 renamed to Transport Post Delivery Action by Jeremy Harris, as
2860 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2861 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2862 redis_servers = needs to be configured which will be used by the redis
2863 lookup. Patch from Warren Baker, of The Packet Hub.
2865 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2867 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2868 hostname or reverse DNS when processing a host list. Used suggestions
2869 from multiple comments on this bug.
2871 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2873 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2874 Missed a few lines, added it to make the runtest require no keyboard
2877 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2878 contains upper case chars. Make router use caseful_local_part.
2880 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2881 support when GnuTLS has been built with p11-kit.
2887 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2889 This, or similar/improved, will also be change PP/11 of 4.82.
2895 PP/01 Handle short writes when writing local log-files.
2896 In practice, only affects FreeBSD (8 onwards).
2897 Bugzilla 1053, with thanks to Dmitry Isaikin.
2899 NM/01 Bugzilla 949 - Documentation tweak
2901 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2904 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2906 PP/02 Implemented gsasl authenticator.
2908 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2910 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2911 `pkg-config foo` for cflags/libs.
2913 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2914 with rest of GSASL and with heimdal_gssapi.
2916 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2917 `pkg-config foo` for cflags/libs for the TLS implementation.
2919 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2920 properties get this fed in as external SSF. A number of robustness
2921 and debugging improvements to the cyrus_sasl authenticator.
2923 PP/08 cyrus_sasl server now expands the server_realm option.
2925 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2926 Patch by Jeremy Harris.
2928 PP/10 Added dbmjz lookup type.
2930 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2932 PP/12 MAIL args handles TAB as well as SP, for better interop with
2933 non-compliant senders.
2934 Analysis and variant patch by Todd Lyons.
2936 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2937 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2938 Patch from Dirk Mueller <dmueller@suse.com>
2940 PP/13 tls_peerdn now print-escaped for spool files.
2941 Observed some $tls_peerdn in wild which contained \n, which resulted
2942 in spool file corruption.
2944 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2945 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2946 or write after TLS renegotiation, which otherwise led to messages
2949 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2950 as a tracking header (ie: a signed header comes before the signature).
2951 Patch from Wolfgang Breyha.
2953 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2954 comma-sep list; embedded commas doubled.
2956 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2958 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2960 Report and patch from Dmitry Banschikov.
2962 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2963 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2964 failures. We appear to now support TLS1.1+ with Exim.
2966 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2967 lets Exim select keys and certificates based upon TLS SNI from client.
2968 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2969 before an outbound SMTP session. New log_selector, +tls_sni.
2971 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2972 NULL dereference. Report and patch from Alun Jones.
2974 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2975 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2976 Not seeing resolver debug output on NetBSD, but suspect this is a
2977 resolver implementation change.
2979 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2980 Left warnings. Added "eximon gdb" invocation mode.
2982 PP/21 Defaulting "accept_8bitmime" to true, not false.
2984 PP/22 Added -bw for inetd wait mode support.
2986 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2987 locate the relevant includes and libraries. Made this the default.
2989 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2990 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2992 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2993 This may cause build issues on older platforms.
2995 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2996 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2997 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2998 Added SNI support via GnuTLS too.
2999 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3001 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3003 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3004 Applied second patch from Janne, implementing suggestion to default
3005 multiple-strings-in-record handling to match SPF spec.
3007 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3009 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3010 read-only, out of scope).
3011 Patch from Wolfgang Breyha, report from Stuart Northfield.
3013 PP/29 Fix three issues highlighted by clang analyser static analysis.
3014 Only crash-plausible issue would require the Cambridge-specific
3015 iplookup router and a misconfiguration.
3016 Report from Marcin Mirosław.
3018 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3020 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3021 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3022 As part of this, removing so much warning spew let me fix some minor
3023 real issues in debug logging.
3025 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3026 assignment on my part. Fixed.
3028 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3029 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3030 Janne Snabb (who went above and beyond: thank you).
3032 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3033 string otherwise requires a connection and a bunch more work and it's
3034 relatively easy to get wrong. Should also expose TLS library linkage
3037 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3038 64-bit ${eval} (JH/03).
3040 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3041 GNU libc to support some of the 64-bit stuff, should not lead to
3042 conflicts. Defined before os.h is pulled in, so if a given platform
3043 needs to override this, it can.
3045 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3046 protection layer was required, which is not implemented.
3047 Bugzilla 1254, patch from Wolfgang Breyha.
3049 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3050 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3051 tls_dhparam take prime identifiers. Also unbreak combination of
3052 OpenSSL+DH_params+TLSSNI.
3054 PP/39 Disable SSLv2 by default in OpenSSL support.
3060 PP/01 Solaris build fix for Oracle's LDAP libraries.
3061 Bugzilla 1109, patch from Stephen Usher.
3063 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3065 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3068 TF/02 Fix a couple more cases where we did not log the error message
3069 when unlink() failed. See also change 4.74-TF/03.
3071 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3072 lock up or crash if it happened to be inside a call to libc when it
3073 got a SIGUSR1 from exiwhat.
3075 The SIGUSR1 handler appends the current process status to the process
3076 log which is later printed by exiwhat. It used to use the general
3077 purpose logging code to do this, but several functions it calls are
3078 not safe for signals.
3080 The new output code in the SIGUSR1 handler is specific to the process
3081 log, and simple enough that it's easy to inspect for signal safety.
3082 Removing some special cases also simplifies the general logging code.
3083 Removing the spurious timestamps from the process log simplifies
3086 TF/04 Improved ratelimit ACL condition.
3088 The /noupdate option has been deprecated in favour of /readonly which
3089 has clearer semantics. The /leaky, /strict, and /readonly update modes
3090 are mutually exclusive. The update mode is no longer included in the
3091 database key; it just determines when the database is updated. (This
3092 means that when you upgrade Exim will forget old rate measurements.)
3094 Exim now checks that the per_* options are used with an update mode that
3095 makes sense for the current ACL. For example, when Exim is processing a
3096 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3097 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3098 must specify per_mail/readonly. If you omit the update mode it defaults to
3099 /leaky where that makes sense (as before) or /readonly where required.
3101 The /noupdate option is now undocumented but still supported for
3102 backwards compatibility. It is equivalent to /readonly except that in
3103 ACLs where /readonly is required you may specify /leaky/noupdate or
3104 /strict/noupdate which are treated the same as /readonly.
3106 A useful new feature is the /count= option. This is a generalization
3107 of the per_byte option, so that you can measure the throughput of other
3108 aggregate values. For example, the per_byte option is now equivalent
3109 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3111 The per_rcpt option has been generalized using the /count= mechanism
3112 (though it's more complicated than the per_byte equivalence). When it is
3113 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3114 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3115 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3116 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3117 Note that using per_rcpt with a non-readonly update mode in more than
3118 one ACL will cause the recipients to be double-counted. (The per_mail
3119 and per_byte options don't have this problem.)
3121 The handling of very low rates has changed slightly. If the computed rate
3122 is less than the event's count (usually one) then this event is the first
3123 after a long gap. In this case the rate is set to the same as this event's
3124 count, so that the first message of a spam run is counted properly.
3126 The major new feature is a mechanism for counting the rate of unique
3127 events. The new per_addr option counts the number of different
3128 recipients that someone has sent messages to in the last time period. It
3129 behaves like per_rcpt if all the recipient addresses are different, but
3130 duplicate recipient addresses do not increase the measured rate. Like
3131 the /count= option this is a general mechanism, so the per_addr option
3132 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3133 example, measure the rate that a client uses different sender addresses
3134 with the options per_mail/unique=$sender_address. There are further
3135 details in the main documentation.
3137 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3139 TF/06 Removed a few PCRE remnants.
3141 TF/07 Automatically extract Exim's version number from tags in the git
3142 repository when doing development or release builds.
3144 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3145 Bugzilla 879. Patch from Paul Fisher.
3147 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3148 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3151 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3153 PP/05 Variable $av_failed, true if the AV scanner deferred.
3154 Bugzilla 1078. Patch from John Horne.
3156 PP/06 Stop make process more reliably on build failure.
3157 Bugzilla 1087. Patch from Heiko Schlittermann.
3159 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3160 Bugzilla 1089. Patch from Heiko Schlittermann.
3162 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3163 Bugzilla 1131. Patch from Holger Weiß.
3165 PP/09 Handle IPv6 addresses with SPF.
3166 Bugzilla 860. Patch from Wolfgang Breyha.
3168 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3170 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3173 PP/11 match_* no longer expand right-hand-side by default.
3174 New compile-time build option, EXPAND_LISTMATCH_RHS.
3175 New expansion conditions, "inlist", "inlisti".
3177 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3179 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3181 PP/14 fix log_write() format string regression from TF/03.
3182 Bugzilla 1152. Patch from Dmitry Isaikin.
3188 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3190 PP/02 Harmonised TLS library version reporting; only show if debugging.
3191 Layout now matches that introduced for other libraries in 4.74 PP/03.
3193 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3195 PP/04 New "dns_use_edns0" global option.
3197 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3200 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3201 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3203 TK/01 Updated PolarSSL code to 0.14.2.
3204 Bugzilla 1097. Patch from Andreas Metzler.
3206 PP/07 Catch divide-by-zero in ${eval:...}.
3207 Fixes bugzilla 1102.
3209 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3212 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3213 format-string attack -- SECURITY: remote arbitrary code execution.
3215 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3216 time unintentionally subject to list matching rules, letting the header
3217 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3218 arbitrary string expansion). This allowed for information disclosure.
3220 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3221 INT_MIN/-1 -- value coerced to INT_MAX.
3227 NM/01 Workaround for PCRE version dependency in version reporting
3230 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3231 This fixes portability to compilers other than gcc, notably
3232 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3234 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3235 makefiles for portability to HP-UX and POSIX correctness.
3237 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3238 Also via indented variable definition in the Makefile.
3239 (Debugging by Oliver Heesakkers).
3241 PP/02 Restore caching of spamd results with expanded spamd_address.
3242 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3244 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3245 Improves build reliability. Fix from: Frank Elsner
3247 NM/02 Fix wide character breakage in the rfc2047 coding
3248 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3250 NM/03 Allow underscore in dnslist lookups
3251 Fixes bug 1026. Patch from Graeme Fowler
3253 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3254 Code patches from Adam Ciarcinski of NetBSD.
3256 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3259 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3260 is logged, to avoid truncation. Patch from John Horne.
3262 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3263 Patch from Jakob Hirsch.
3265 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3266 SQL string expansion failure details.
3267 Patch from Andrey Oktyabrski.
3269 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3270 Patch from Simon Arlott.
3272 PP/09 New lookups functionality failed to compile on old gcc which rejects
3273 extern declarations in function scope.
3274 Patch from Oliver Fleischmann
3276 PP/10 Use sig_atomic_t for flags set from signal handlers.
3277 Check getgroups() return and improve debugging.
3278 Fixed developed for diagnosis in bug 927 (which turned out to be
3281 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3282 Patch from Mark Zealey.
3284 PP/12 Bugzilla 1056: Improved spamd server selection.
3285 Patch from Mark Zealey.
3287 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3288 Based on patch from Heiko Schlittermann.
3290 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3291 Patch from Uwe Doering, sign-off by Michael Haardt.
3293 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3294 variable declaration deep within a block. Bug and patch from
3297 PP/15 lookups-Makefile IRIX compatibility coercion.
3299 PP/16 Make DISABLE_DKIM build knob functional.
3301 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3302 Patch by Simon Arlott
3304 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3305 variable argument macros. Our copy now differs from upstream.
3311 TF/01 Failure to get a lock on a hints database can have serious
3312 consequences so log it to the panic log.
3314 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3315 controlled using the smtp_confirmation log selector.
3317 TF/03 Include the error message when we fail to unlink a spool file.
3319 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3320 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3321 for maintaining out-of-tree patches for some time.
3323 PP/01 Bugzilla 139: Documentation and portability issues.
3324 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3325 Handle per-OS dynamic-module compilation flags.
3327 PP/02 Let /dev/null have normal permissions.
3328 The 4.73 fixes were a little too stringent and complained about the
3329 permissions on /dev/null. Exempt it from some checks.
3330 Reported by Andreas M. Kirchwitz.
3332 PP/03 Report version information for many libraries, including
3333 Exim version information for dynamically loaded libraries. Created
3334 version.h, now support a version extension string for distributors
3335 who patch heavily. Dynamic module ABI change.
3337 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3338 privilege escalation vulnerability whereby the Exim run-time user
3339 can cause root to append content of the attacker's choosing to
3342 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3345 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3346 If dropping privileges for untrusted macros, we disabled normal logging
3347 on the basis that it would fail; for the Exim run-time user, this is not
3348 the case, and it resulted in successful deliveries going unlogged.
3349 Fixed. Reported by Andreas Metzler.
3355 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3356 only prepend for the Resent-* case. Fixes regression introduced in
3357 Exim 4.70 by NM/22 for Bugzilla 607.
3359 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3360 increasing numbers of administrators be bitten by this.
3362 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3364 PP/03 Bugzilla 994: added openssl_options main configuration option.
3366 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3368 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3370 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3372 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3373 without a peer certificate, leading to a segfault because of an
3374 assumption that peers always have certificates. Be a little more
3375 paranoid. Problem reported by Martin Tscholak.
3377 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3378 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3379 NB: ClamAV planning to remove STREAM in "middle of 2010".
3380 CL also introduces -bmalware, various -d+acl logging additions and
3381 more caution in buffer sizes.
3383 PP/09 Implemented reverse_ip expansion operator.
3385 PP/10 Bugzilla 937: provide a "debug" ACL control.
3387 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3389 PP/12 Bugzilla 973: Implement --version.
3391 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3393 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3395 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3397 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3398 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3399 ignore trailing whitespace.
3401 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3403 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3406 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3407 Notification from Dr Andrew Aitchison.
3409 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3410 ExtendedDetectionInfo response format.
3411 Notification from John Horne.
3413 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3416 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3417 XSL and documented dependency on system catalogs, with examples of how
3420 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3423 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3424 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3425 configuration file which is writeable by the Exim user or group.
3427 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3428 of configuration files to cover files specified with the -C option if
3429 they are going to be used with root privileges, not just the default
3432 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3433 option (effectively making it always true).
3435 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3436 files to be used while preserving root privileges.
3438 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3439 that rogue child processes cannot use them.
3441 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3442 run-time user, instead of root.
3444 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3445 Exim run-time user without dropping privileges.
3447 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3448 result string, instead of calling string_vformat() twice with the same
3451 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3452 for other users. Others should always drop root privileges if they use
3453 -C on the command line, even for a whitelisted configure file.
3455 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3457 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3463 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3464 $data_path, and $header_path variables; fixed documentation bugs and
3467 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3468 exipick to access non-standard spools, including the "frozen" queue
3471 NM/01 Bugzilla 965: Support mysql stored procedures.
3472 Patch from Alain Williams
3474 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3476 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3477 Patch from Andreas Metzler
3479 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3480 Patch from Kirill Miazine
3482 NM/05 Bugzilla 671: Added umask to procmail example.
3484 JJ/03 installed exipick 20100323.0, fixing doc bug
3486 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3487 directory. Notification and patch from Dan Rosenberg.
3489 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3491 TK/02 Improve log output when DKIM signing operation fails.
3493 MH/01 Treat the transport option dkim_domain as a colon separated
3494 list, not as a single string, and sign the message with each element,
3495 omitting multiple occurences of the same signer.
3497 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3498 Bugzilla 985, 986. Patch by Simon Arlott
3500 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3501 Patch by Simon Arlott
3503 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3504 MBX locking. Notification from Dan Rosenberg.
3510 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3512 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3514 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3516 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3518 NM/04 Bugzilla 915: Flag broken perl installation during build.
3524 TK/01 Added patch by Johannes Berg that expands the main option
3525 "spamd_address" if it starts with a dollar sign.
3527 TK/02 Write list of recipients to X-Envelope-Sender header when building
3528 the mbox-format spool file for content scanning (suggested by Jakob
3531 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3532 (http://www.dcc-servers.net/) support via dccifd. Activated by
3533 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3535 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3536 by Mark Daniel Reidel <mr@df.eu>.
3538 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3539 When building exim an external PCRE library is now needed -
3540 PCRE is a system library on the majority of modern systems.
3541 See entry on PCRE_LIBS in EDITME file.
3543 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3544 conversation. Added nologin parameter to request.
3545 Patch contributed by Kirill Miazine.
3547 TF/01 Do not log submission mode rewrites if they do not change the address.
3549 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3551 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3552 log files in place. Contributed by Roberto Lima.
3554 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3556 TF/03 Bugzilla 615: When checking the local_parts router precondition
3557 after a local_part_suffix or local_part_prefix option, Exim now
3558 does not use the address's named list lookup cache, since this
3559 contains cached lookups for the whole local part.
3561 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3562 Robert Millan. Documentation is in experimental-spec.txt.
3564 TF/04 Bugzilla 668: Fix parallel build (make -j).
3566 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3568 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3569 Patch provided by Jan Srzednicki.
3571 TF/05 Leading white space used to be stripped from $spam_report which
3572 wrecked the formatting. Now it is preserved.
3574 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3575 that they are available at delivery time.
3577 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3579 TF/08 TLS error reporting now respects the incoming_interface and
3580 incoming_port log selectors.
3582 TF/09 Produce a more useful error message if an SMTP transport's hosts
3583 setting expands to an empty string.
3585 NM/06 Bugzilla 744: EXPN did not work under TLS.
3586 Patch provided by Phil Pennock.
3588 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3589 Patch provided by Richard Godbee.
3591 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3592 acl_smtp_notquit, added index entry.
3594 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3595 Patch provided by Eugene Bujak.
3597 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3598 accept(). Patch provided by Maxim Dounin.
3600 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3601 Patch provided by Phil Pennock.
3603 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3605 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3606 Patch provided by Brad "anomie" Jorsch.
3608 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3609 Patch provided by Dean Brooks.
3611 TK/05 Add native DKIM support (does not depend on external libraries).
3613 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3614 Patch provided by Graeme Fowler.
3616 NM/16 Bugzilla 851: Documentation example syntax fix.
3618 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3620 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3623 NM/19 Bugzilla 745: TLS version reporting.
3624 Patch provided by Phil Pennock.
3626 NM/20 Bugzilla 167: bool: condition support.
3627 Patch provided by Phil Pennock.
3629 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3630 clients. Patch provided by Phil Pennock.
3632 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3633 Patch provided by Brad "anomie" Jorsch.
3635 NM/23 Bugzilla 687: Fix misparses in eximstats.
3636 Patch provided by Heiko Schlittermann.
3638 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3639 Patch provided by Heiko Schlittermann.
3641 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3642 plus update to original patch.
3644 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3646 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3647 Patch provided by David Brownlee.
3649 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3651 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3653 NM/30 Bugzilla 888: TLS documentation bugfixes.
3655 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3657 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3658 Unlike the original bugzilla I have changed all shell scripts in src tree.
3660 NM/33 Bugzilla 898: Transport filter timeout fix.
3661 Patch by Todd Rinaldo.
3663 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3664 Patch by Serge Demonchaux.
3666 NM/35 Bugzilla 39: Base64 decode bug fixes.
3667 Patch by Jakob Hirsch.
3669 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3671 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3673 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3675 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3681 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3682 ALT-N's libdkim that I have put here:
3683 http://duncanthrax.net/exim-experimental/
3685 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3686 were called 'true' and it seems that C99 defines that as a reserved
3687 keyword to be used with 'bool' variable types. That means you could
3688 not include C99-style headers which use bools without triggering
3689 build errors in sieve.c.
3691 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3692 as mailq or other aliases. Changed the --help handling significantly
3693 to do whats expected. exim_usage() emits usage/help information.
3695 SC/01 Added the -bylocaldomain option to eximstats.
3697 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3699 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3701 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3707 PH/01 Another patch from the Sieve maintainer.
3709 PH/02 When an IPv6 address is converted to a string for single-key lookup
3710 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3711 dots are used instead of colons so that keys in lsearch files need not
3712 contain colons. This was done some time before quoting was made available
3713 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3714 (notated using the quote facility) so as to distinguish them from IPv4
3715 keys. This meant that lookups for IP addresses in host lists did not work
3716 for iplsearch lookups.
3718 This has been fixed by arranging for IPv6 addresses to be expressed with
3719 colons if the lookup type is iplsearch. This is not incompatible, because
3720 previously such lookups could never work.
3722 The situation is now rather anomalous, since one *can* have colons in
3723 ordinary lsearch keys. However, making the change in all cases is
3724 incompatible and would probably break a number of configurations.
3726 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3729 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3730 conversion specification without a maximum field width, thereby enabling
3731 a rogue spamd server to cause a buffer overflow. While nobody in their
3732 right mind would setup Exim to query an untrusted spamd server, an
3733 attacker that gains access to a server running spamd could potentially
3734 exploit this vulnerability to run arbitrary code as the Exim user.
3736 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3737 $primary_hostname instead of what libspf2 thinks the hosts name is.
3739 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3740 a directory entry by the name of the lookup key. Previously, if a
3741 symlink pointed to a non-existing file or a file in a directory that
3742 Exim lacked permissions to read, a lookup for a key matching that
3743 symlink would fail. Now it is enough that a matching directory entry
3744 exists, symlink or not. (Bugzilla 503.)
3746 PH/03 The body_linecount and body_zerocount variables are now exported in the
3749 PH/04 Added the $dnslist_matched variable.
3751 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3752 This means they are set thereafter only if the connection becomes
3755 PH/06 Added the client_condition to authenticators so that some can be skipped
3756 by clients under certain conditions.
3758 PH/07 The error message for a badly-placed control=no_multiline_responses left
3759 "_responses" off the end of the name.
3761 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3763 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3764 (without spaces) instead of just copying the configuration text.
3766 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3768 PH/11 Added $max_received_linelength.
3770 PH/12 Added +ignore_defer and +include_defer to host lists.
3772 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3773 way in which PCRE > 7.0 is built.
3775 PH/14 Implemented queue_only_load_latch.
3777 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3778 MAIL command. The effect was to mangle the value on 64-bit systems.
3780 PH/16 Another patch from the Sieve maintainer.
3782 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3784 PH/18 If a system quota error occurred while trying to create the file for
3785 a maildir delivery, the message "Mailbox is full" was not appended to the
3786 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3787 only to a quota excession during the actual writing of the file.
3789 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3790 characters?) which causes problems in log lines. The DN values are now
3791 passed through string_printing() before being added to log lines.
3793 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3794 and InterBase are left for another time.)
3796 PH/21 Added message_body_newlines option.
3798 PH/22 Guard against possible overflow in moan_check_errorcopy().
3800 PH/23 POSIX allows open() to be a macro; guard against that.
3802 PH/24 If the recipient of an error message contained an @ in the local part
3803 (suitably quoted, of course), incorrect values were put in $domain and
3804 $local_part during the evaluation of errors_copy.
3810 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3811 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3814 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3815 issue a MAIL command.
3817 PH/02 In an ACL statement such as
3819 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3821 if a client was not listed at all, or was listed with a value other than
3822 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3823 the condition was not true (as it should be), so access was not denied.
3824 The bug was that the ! inversion was incorrectly passed on to the second
3825 item. This has been fixed.
3827 PH/03 Added additional dnslists conditions == and =& which are different from
3828 = and & when the dns lookup returns more than one IP address.
3830 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3831 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3833 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3834 FSYNC, which compiles an option called disable_fsync that allows for
3835 bypassing fsync(). The documentation is heavily laced with warnings.
3837 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3839 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3840 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3841 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3842 including adding "make clean"; (3) Added -fPIC when compiling the test
3843 dynamically loaded module, to get rid of a warning.
3845 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3846 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3847 = 0s. The bug is otherwise harmless.
3849 PH/07 There was a bug in the dovecot authenticator such that the value of
3850 $auth1 could be overwritten, and so not correctly preserved, after a
3851 successful authentication. This usually meant that the value preserved by
3852 the server_setid option was incorrect.
3854 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3856 PH/09 Installed PCRE release 7.0.
3858 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3859 run for batched SMTP input. It is now run at the start of every message
3860 in the batch. While fixing this I discovered that the process information
3861 (output by running exiwhat) was not always getting set for -bs and -bS
3862 input. This is fixed, and it now also says "batched" for BSMTP.
3864 PH/11 Added control=no_pipelining.
3866 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3867 patch, slightly modified), and move the expansion of helo_data till after
3868 the connection is made in the smtp transport (so it can use these
3871 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3873 PH/14 Added log_selector = +pid.
3875 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3877 PH/16 Add ${if forany and ${if forall.
3879 PH/17 Added dsn_from option to vary the From: line in DSNs.
3881 PH/18 Flush SMTP output before performing a callout, unless control =
3882 no_callout_flush is set.
3884 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3885 was true (the default) a successful delivery failed to delete the retry
3886 item, thus causing premature timeout of the address. The bug is now
3889 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3891 PH/21 Long custom messages for fakedefer and fakereject are now split up
3892 into multiline responses in the same way that messages for "deny" and
3893 other ACL rejections are.
3895 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3896 with slight modification.
3898 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3899 draft, changing the syntax and factoring some duplicate code".
3901 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3902 for deliveries of the second and subsequent messages over the same SMTP
3905 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3906 ${reduce, with only minor "tidies".
3908 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3910 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3911 expansion side effects.
3913 PH/27 When a message times out after an over-quota error from an Exim-imposed
3914 quota, the bounce message says "mailbox is full". This message was not
3915 being given when it was a system quota that was exceeded. It now should
3918 MH/03 Made $recipients available in local_scan(). local_scan() already has
3919 better access to the recipient list through recipients_list[], but
3920 $recipients can be useful in postmaster-provided expansion strings.
3922 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3923 in the case of a MAIL command with additional options following the
3924 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3925 were accidentally chopped off.
3927 PH/29 SMTP synchronization checks are implemented when a command is read -
3928 there is a check that no more input is waiting when there shouldn't be
3929 any. However, for some commands, a delay in an ACL can mean that it is
3930 some time before the response is written. In this time, more input might
3931 arrive, invalidly. So now there are extra checks after an ACL has run for
3932 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3933 pipelining has not been advertised.
3935 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3937 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3938 returned in the SMTP response when smtp_return_error_details was false.
3939 This has been fixed.
3941 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3942 instead of the C I/O that was originally supplied, because problems were
3943 reported on Solaris.
3945 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3946 Exim which did not show up earlier: it was assuming that a call to
3947 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3948 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3949 was a macro that became an assignment, so it seemed to work. This has
3950 changed to a proper function call with a void return, hence the compile
3951 error. Exim's code has been fixed.
3953 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3956 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3958 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3960 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3961 because it turns out to be too big or there is a timeout) there is no
3962 "Completed" line in the log. When some messages of this type were
3963 selected by exigrep, they were listed as "not completed". Others were
3964 picked up by some special patterns. I have improved the selection
3965 criteria to be more general.
3967 PH/38 The host_find_failed option in the manualroute router can now be set
3968 to "ignore", to completely ignore a host whose IP address cannot be
3969 found. If all hosts are ignored, the behaviour is controlled by the new
3970 host_all_ignored option.
3972 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3973 homing or because of multiple MX records with /mx) generated more than
3974 one IP address, and the following item turned out to be the local host,
3975 all the secondary addresses of the first item were incorrectly removed
3976 from the list, along with the local host and any following hosts (which
3977 is what is supposed to happen).
3979 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3980 whoever called Exim into the -H file. In the case of the daemon it was
3981 behaving confusingly. When first started, it used values for whoever
3982 started the daemon, but after a SIGHUP it used the Exim user (because it
3983 calls itself on a restart). I have changed the code so that it now always
3986 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3987 message are rejected with the same error (e.g. no authentication or bad
3988 sender address), and a DATA command is nevertheless sent (as can happen
3989 with PIPELINING or a stupid MUA), the error message that was given to the
3990 RCPT commands is included in the rejection of the DATA command. This is
3991 intended to be helpful for MUAs that show only the final error to their
3994 PH/42 Another patch from the Sieve maintainer.
3996 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3997 Eximstats - Fixed some broken HTML links and added missing column headers
3999 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4000 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4002 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4004 PH/43 Yet another patch from the Sieve maintainer.
4006 PH/44 I found a way to check for a TCP/IP connection going away before sending
4007 the response to the final '.' that terminates a message, but only in the
4008 case where the client has not sent further data following the '.'
4009 (unfortunately, this is allowed). However, in many cases there won't be
4010 any further data because there won't be any more messages to send. A call
4011 to select() can be used: if it shows that the input is "ready", there is
4012 either input waiting, or the socket has been closed. An attempt to read
4013 the next input character can distinguish the two cases. Previously, Exim
4014 would have sent an OK response which the client would never have see.
4015 This could lead to message repetition. This fix should cure that, at
4016 least in a lot of common cases.
4018 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4019 advertised in response to EHLO.
4025 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4026 fixed by 4.65/MH/01 (is this a record?) are fixed:
4028 (i) An empty string was always treated as zero by the numeric comparison
4029 operators. This behaviour has been restored.
4031 (ii) It is documented that the numeric comparison operators always treat
4032 their arguments as decimal numbers. This was broken in that numbers
4033 starting with 0 were being interpreted as octal.
4035 While fixing these problems I realized that there was another issue that
4036 hadn't been noticed. Values of message_size_limit (both the global option
4037 and the transport option) were treated as octal if they started with 0.
4038 The documentation was vague. These values are now always treated as
4039 decimal, and I will make that clear in the documentation.
4045 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4046 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4049 MH/01 Don't check that the operands of numeric comparison operators are
4050 integers when their expansion is in "skipping" mode (fixes bug
4051 introduced by 4.64-PH/07).
4053 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4054 child addresses, Exim now panics and dies. Previously, because the count
4055 is held in a short int, deliveries were likely to be lost. As such a
4056 large number of recipients for a single message is ridiculous
4057 (performance will be very, very poor), I have chosen to impose a limit
4058 rather than extend the field.
4064 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4065 leftover -K file (the existence of which was triggered by #402).
4066 While we were at it, introduced process PID as part of the -K
4067 filename. This should rule out race conditions when creating
4070 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4071 processing considerably. Previous code took too long for large mails,
4072 triggering a timeout which in turn triggers #401.
4074 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4075 in the DK code in transports.c. sendfile() is not really portable,
4076 hence the _LINUX specificness.
4078 TF/01 In the add_headers option to the mail command in an Exim filter,
4079 there was a bug that Exim would claim a syntax error in any
4080 header after the first one which had an odd number of characters
4083 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4084 callout verification, Exim cached a "reject" for the entire domain. This
4085 is correct for most verifications, but it is not correct for a recipient
4086 verification with use_sender or use_postmaster set, because in that case
4087 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4088 case of MAIL FROM:<> rejection from other early rejections (e.g.
4089 rejection of HELO). When verifying a recipient using a non-null MAIL
4090 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4091 Whatever the result of the callout, the value of the domain cache is
4092 left unchanged (for any other kind of callout, getting as far as trying
4093 RCPT means that the domain itself is ok).
4095 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4098 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4099 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4100 session, the daemon ignores ECONNECT errors and logs others; it now
4101 ignores EPIPE as well.
4103 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4104 (quoted-printable decoding).
4106 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4107 later the small subsequent patch to fix an introduced bug.
4109 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4111 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4113 PH/08 An error is now given if message_size_limit is specified negative.
4115 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4116 to be given (somewhat) arbitrary names.
4118 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4121 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4122 miscellaneous code fixes
4124 PH/10 Added the log_reject_target ACL modifier to specify where to log
4127 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4128 hostname. This is wrong, because it relates to the incoming message (and
4129 probably the interface on which it is arriving) and not to the outgoing
4130 callout (which could be using a different interface). This has been
4131 changed to use the value of the helo_data option from the smtp transport
4132 instead - this is what is used when a message is actually being sent. If
4133 there is no remote transport (possible with a router that sets up host
4134 addresses), $smtp_active_hostname is used.
4136 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4137 tweaks were necessary in order to get it to work (see also 21 below):
4138 (a) The code assumed that strncpy() returns a negative number on buffer
4139 overflow, which isn't the case. Replaced with Exim's string_format()
4141 (b) There were several signed/unsigned issues. I just did the minimum
4142 hacking in of casts. There is scope for a larger refactoring.
4143 (c) The code used strcasecmp() which is not a standard C function.
4144 Replaced with Exim's strcmpic() function.
4145 (d) The code set only $1; it now sets $auth1 as well.
4146 (e) A simple test gave the error "authentication client didn't specify
4147 service in request". It would seem that Dovecot has changed its
4148 interface. Fortunately there's a specification; I followed it and
4149 changed what the client sends and it appears to be working now.
4151 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4154 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4155 address A is aliased to B and C, where B exists and C does not. Without
4156 -v the output is "A verified" because verification stops after a
4157 successful redirection if more than one address is generated. However,
4158 with -v the child addresses are also verified. Exim was outputting "A
4159 failed to verify" and then showing the successful verification for C,
4160 with its parentage. It now outputs "B failed to verify", showing B's
4161 parentage before showing the successful verification of C.
4163 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4164 look up a TXT record in a specific list after matching in a combined
4167 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4168 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4169 they consult the DNS. I had assumed they would set it the way they
4170 wanted; and indeed my experiments on Linux seem to show that in some
4171 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4172 To be on the safe side, however, I have now made the interface to
4173 host_find_byname() similar to host_find_bydns(), with an argument
4174 containing the DNS resolver options. The host_find_byname() function now
4175 sets these options at its start, just as host_find_bydns() does. The smtp
4176 transport options dns_qualify_single and dns_search_parents are passed to
4177 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4178 of host_find_byname() use the default settings of RES_DEFNAMES
4179 (qualify_single) but not RES_DNSRCH (search_parents).
4181 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4182 spool_read_header() do less string testing, by means of a preliminary
4183 switch on the second character of optional "-foo" lines. (This is
4184 overdue, caused by the large number of possibilities that now exist.
4185 Originally there were few.) While I was there, I also converted the
4186 str(n)cmp tests so they don't re-test the leading "-" and the first
4187 character, in the hope this might squeeze out yet more improvement.
4189 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4190 flag allowing group syntax was set by the header_syntax check but not
4191 turned off, possible causing trouble later; (2) The flag was not being
4192 set at all for the header_verify test, causing "group"-style headers to
4193 be rejected. I have now set it in this case, and also caused header_
4194 verify to ignore an empty address taken from a group. While doing this, I
4195 came across some other cases where the code for allowing group syntax
4196 while scanning a header line wasn't quite right (mostly, not resetting
4197 the flag correctly in the right place). These bugs could have caused
4198 trouble for malformed header lines. I hope it is now all correct.
4200 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4201 with the "reply" argument non-NULL. The code, however (which originally
4202 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4203 but it didn't always do it. This confused somebody who was copying the
4204 code for some other use. I have removed all the tests.
4206 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4207 feature that was used to support insecure browsers during the U.S. crypto
4208 embargo. It requires special client support, and Exim is probably the
4209 only MTA that supported it -- and would never use it because real RSA is
4210 always available. This code has been removed, because it had the bad
4211 effect of slowing Exim down by computing (never used) parameters for the
4212 RSA_EXPORT functionality.
4214 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4215 authenticator to fail if there's a tab character in the incoming data
4216 (there should never be unless someone is messing about, as it's supposed
4217 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4218 if the connection is using TLS or if the remote IP is the same as the
4219 local IP, and the "valid-client-cert option" if a client certificate has
4222 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4223 authenticators. This can be used for authorization after authentication
4224 succeeds. (In the case of plaintext, it servers for both authentication
4227 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4228 if any retry times were supplied.
4230 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4231 connection, where there is no client IP address to check. In this
4232 situation, the verify now always succeeds.
4234 PH/25 Applied John Jetmore's -Mset patch.
4236 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4238 PH/27 In a string expansion for a processed (not raw) header when multiple
4239 headers of the same name were present, leading whitespace was being
4240 removed from all of them, but trailing whitespace was being removed only
4241 from the last one. Now trailing whitespace is removed from each header
4242 before concatenation. Completely empty headers in a concatenation (as
4243 before) are ignored.
4245 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4246 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4248 PH/29 [Removed. This was a change that I later backed out, and forgot to
4249 correct the ChangeLog entry (that I had efficiently created) before
4250 committing the later change.]
4252 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4253 address errors (4xx response to RCPT) over the same connection as other
4254 messages routed to the same hosts. Such deliveries are always "forced",
4255 so retry times are not inspected. This resulted in far too many retries
4256 for the affected addresses. The effect occurred only when there were more
4257 hosts than the hosts_max_try setting in the smtp transport when it had
4258 the 4xx errors. Those hosts that it had tried were not added to the list
4259 of hosts for which the message was waiting, so if all were tried, there
4260 was no problem. Two fixes have been applied:
4262 (i) If there are any address or message errors in an SMTP delivery, none
4263 of the hosts (tried or untried) are now added to the list of hosts
4264 for which the message is waiting, so the message should not be a
4265 candidate for sending over the same connection that was used for a
4266 successful delivery of some other message. This seems entirely
4267 reasonable: after all the message is NOT "waiting for some host".
4268 This is so "obvious" that I'm not sure why it wasn't done
4269 previously. Hope I haven't missed anything, but it can't do any
4270 harm, as the worst effect is to miss an optimization.
4272 (ii) If, despite (i), such a delivery is accidentally attempted, the
4273 routing retry time is respected, so at least it doesn't keep
4274 hammering the server.
4276 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4277 in ${readsocket because some servers need this prod.
4279 PH/32 Added some extra debug output when updating a wait-xxx database.
4281 PH/33 The hint "could be header name not terminated by colon", which has been
4282 given for certain expansion errors for a long time, was not being given
4283 for the ${if def:h_colon_omitted{... case.
4285 PH/34 The spec says: "With one important exception, whenever a domain list is
4286 being scanned, $domain contains the subject domain." There was at least
4287 one case where this was not true.
4289 PH/35 The error "getsockname() failed: connection reset by peer" was being
4290 written to the panic log as well as the main log, but it isn't really
4291 panic-worthy as it just means the connection died rather early on. I have
4292 removed the panic log writing for the ECONNRESET error when getsockname()
4295 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4296 runs only) independently of the message's sender address. This meant
4297 that, if the 4xx error was in fact related to the sender, a different
4298 message to the same recipient with a different sender could confuse
4299 things. In particular, this can happen when sending to a greylisting
4300 server, but other circumstances could also provoke similar problems.
4301 I have changed the default so that the retry time for these errors is now
4302 based a combination of the sender and recipient addresses. This change
4303 can be overridden by setting address_retry_include_sender=false in the
4306 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4307 remote server are returned as part of bounce messages. This was not
4308 happening for LMTP over a pipe (the lmtp transport), but now it is the
4309 same for both kinds of LMTP.
4311 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4312 in header lines that were in fact CNAMEs. This is no longer the case.
4314 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4315 and queue runs started by the daemon processed all messages. This has
4316 been fixed so that -R and -S can now usefully be given with -q<time>.
4318 PH/40 Import PCRE release 6.7 (fixes some bugs).
4320 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4322 PH/42 Give an error if -q is specified more than once.
4324 PH/43 Renamed the variables $interface_address and $interface_port as
4325 $received_ip_address and $received_port, to make it clear that these
4326 values apply to message reception, and not to the outgoing interface when
4327 a message is delivered. (The old names remain recognized, of course.)
4329 PH/44 There was no timeout on the connect() call when using a Unix domain
4330 socket in the ${readsocket expansion. There now is.
4332 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4333 be meaningful with "accept".
4335 SC/01 Eximstats V1.43
4336 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4338 SC/02 Eximstats V1.44
4339 Use a glob alias rather than an array ref in the generated
4340 parser. This improves both readability and performance.
4342 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4343 Collect SpamAssassin and rejection statistics.
4344 Don't display local sender or destination tables unless
4345 there is data to show.
4346 Added average volumes into the top table text output.
4348 SC/04 Eximstats V1.46
4349 Collect data on the number of addresses (recipients)
4350 as well as the number of messages.
4352 SC/05 Eximstats V1.47
4353 Added 'Message too big' to the list of mail rejection
4354 reasons (thanks to Marco Gaiarin).
4356 SC/06 Eximstats V1.48
4357 Mainlog lines which have GMT offsets and are too short to
4358 have a flag are now skipped.
4360 SC/07 Eximstats V1.49 (Alain Williams)
4361 Added the -emptyok flag.
4363 SC/08 Eximstats V1.50
4364 Fixes for obtaining the IP address from reject messages.
4366 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4367 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4368 whitespace changes from 4.64-PH/27
4370 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4373 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4374 are found, allow negative numbers in numeric criteria)
4376 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4378 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4379 to match changes made in 4.64-PH/43
4381 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4383 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4384 "domain" is actually an IP address, and force a failure. This locks out
4385 those revolvers/nameservers that support "A-for-A" lookups, in
4386 contravention of the specifications.
4388 PH/48 When a host name was looked up from an IP address, and the subsequent
4389 forward lookup of the name timed out, the host name was left in
4390 $sender_host_name, contrary to the specification.
4392 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4393 restricted to single-key lookups, Exim was not diagnosing an error if
4394 * or *@ was used with a query-style lookup.
4396 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4398 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4399 long ago, but noone interested enough thought of it. Let's just say that
4400 the "1.1" means that there are some new functions that weren't there at
4401 some point in the past.
4403 PH/51 Error processing for expansion failure of helo_data from an smtp
4404 transport during callout processing was broken.
4406 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4407 tested/used via the -bh/-bhc/-bs options.
4409 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4410 bug, fixed in subsequent PCRE releases).
4412 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4413 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4415 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4421 SC/01 Use a glob alias rather than an array ref in eximstats generated
4422 parser. This improves both readability and performance.
4424 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4425 Don't display local sender or destination tables in eximstats unless
4426 there is data to show.
4427 Added average volumes into the eximstats top table text output.
4429 SC/03 Collect data on the number of addresses (recipients) as well
4430 as the number of messages in eximstats.
4432 TF/01 Correct an error in the documentation for the redirect router. Exim
4433 does (usually) call initgroups() when daemonizing.
4435 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4436 with consistent privilege compared to when running as a daemon.
4438 TF/03 Note in the spec that $authenticated_id is not set for local
4439 submissions from trusted users.
4441 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4442 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4444 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4445 by adding some example configuration directives to the default
4446 configuration file. A little bit of work is required to uncomment the
4447 directives and define how usernames and passwords are checked, but
4448 there is now a framework to start from.
4450 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4451 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4452 without this. I don't know how relevant this is to other LDAP libraries.
4454 PH/02 Add the verb name to the "unknown ACL verb" error.
4456 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4458 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4460 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4461 directory not expanded when it should be if an expanded home directory
4462 was set for the address (which is overridden by the transport).
4464 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4467 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4468 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4469 because it is too late at that time, and has no effect.
4471 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4472 security issue with \' (bugzilla #107). I could not use the
4473 PQescapeStringConn() function, because it needs a PGconn value as one of
4476 PH/08 When testing addresses using -bt, indicate those final addresses that
4477 are duplicates that would not cause an additional delivery. At least one
4478 person was confused, thinking that -bt output corresponded to deliveries.
4479 (Suppressing duplicates isn't a good idea as you lose the information
4480 about possibly different redirections that led to the duplicates.)
4482 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4483 systems where poll() doesn't work, in particular OS X.
4485 PH/10 Added more information to debugging output for retry time not reached.
4487 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4488 operations in malware.c.
4490 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4493 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4494 syslog_duplication set false, log lines that would normally be written
4495 both the the main log and to the reject log were not written to syslog at
4498 PH/14 In the default configuration, change the use of "message" in ACL warn
4499 statements to "add_header".
4501 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4502 not followed by a command (e.g. "seen endif").
4504 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4505 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4508 PH/17 Added extra conditions to the default value of delay_warning_condition
4512 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4513 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4514 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4517 The Auto-Submitted: and various List- headers are standardised, whereas I
4518 don't think Precedence: ever was.
4520 PH/18 Refactored debugging code in route_finduser() to show more information,
4521 in particular, the error code if getpwnam() issues one.
4523 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4524 This is apparently needed in addition to the PH/07 change above to avoid
4525 any possible encoding problems.
4527 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4528 but not after initializing Perl.
4530 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4531 output them only if debugging. By default they are written stderr,
4532 apparently, which is not desirable.
4534 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4537 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4540 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4542 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4543 authenticated or an ident call has been made. Suppress the default
4544 values for $authenticated_id and $authenticated_sender (but permit -oMai
4545 and -oMas) when testing with -bh.
4547 PH/24 Re-jigged the order of the tests in the default configuration so that the
4548 tests for valid domains and recipients precede the DNS black list and CSA
4549 tests, on the grounds that those ones are more expensive.
4551 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4552 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4553 This bug exists in every version of Exim that I still have, right back to
4556 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4557 However, an attempt to turn on case-sensitivity in a regex key by
4558 including (?-i) didn't work because the subject string was already
4559 lowercased, and the effects were non-intuitive. It turns out that a
4560 one-line patch can be used to allow (?-i) to work as expected.
4566 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4567 other effects) broke the use of negated acl sub-conditions.
4569 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4572 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4573 "Deny" causes Exim to reject the incoming connection with a 554 error.
4574 Unfortunately, if there is a major crisis, such as a disk failure,
4575 tcp-wrappers gives "deny", whereas what one would like would be some
4576 kind of temporary error. A kludge has been added to help with this.
4577 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4578 554 error is used if errno is still zero or contains ENOENT (which occurs
4579 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4582 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4584 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4585 errors. Otherwise a message that provokes a temporary error (when other
4586 messages do not) can cause a whole host to time out.
4588 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4589 addresses were routed directly to files or pipes from a redirect router.
4590 File deliveries just didn't batch; pipe deliveries might have suffered
4593 PH/06 A failure to get a lock for a hints database would erroneously always say
4594 "Failed to get write lock", even when it was really a read lock.
4596 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4597 of 0600. This has been changed to use the value of the lockfile_mode
4598 option (which defaults to 0600).
4600 PH/08 Applied small patch from the Sieve maintainer.
4602 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4603 folder from quota calculations, a direct delivery into this folder messed
4604 up the contents of the maildirsize file. This was because the regex was
4605 used only to exclude .Trash (or whatever) when the size of the mailbox
4606 was calculated. There was no check that a delivery was happening into an
4607 excluded directory. This bug has been fixed by ignoring all quota
4608 processing for deliveries into excluded directories.
4610 PH/10 Added the maildirfolder_create_regex option to appendfile.
4616 PH/01 The code for finding all the local interface addresses on a FreeBSD
4617 system running IPv6 was broken. This may well have applied to all BSD
4618 systems, as well as to others that have similar system calls. The broken
4619 code found IPv4 interfaces correctly, but gave incorrect values for the
4620 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4621 that it would not match correctly against @[] and not recognize the IPv6
4624 PH/02 The ipliteral router was not recognizing addresses of the form user@
4625 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4627 PH/03 Added disable_ipv6.
4629 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4630 decoded form, because it is most often used to construct To: headers
4631 lines in autoreplies, and the decoded form may well be syntactically
4632 invalid. However, $reply_address has leading white space removed, and all
4633 newlines turned into spaces so that the autoreply transport does not
4636 PH/05 If group was specified without a user on a router, and no group or user
4637 was specified on a transport, the group from the router was ignored.
4639 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4640 for visible compile-time settings that can be used to change these
4641 numbers, for those that want even more. Backwards compatibility with old
4642 spool files has been maintained. However, going back to a previous Exim
4643 release will lost any variables that are in spool files.
4645 PH/07 Two small changes when running in the test harness: increase delay when
4646 passing a TCP/IP connection to a new process, in case the original
4647 process has to generate a bounce, and remove special handling of
4648 127.0.0.2 (sic), which is no longer necessary.
4650 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4651 be the same on different OS.
4653 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4656 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4657 whether --show-vars was specified or not
4659 JJ/02 exipick: Added support for new ACL variable spool format introduced
4662 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4663 syntactically invalid From: or Reply-to: line, and a filter used this to
4664 generate an autoreply, and therefore failed to obtain an address for the
4665 autoreply, Exim could try to deliver to a non-existent relative file
4666 name, causing unrelated and misleading errors. What now happens is that
4667 it logs this as a hard delivery error, but does not attempt to create a
4670 PH/11 The exinext utility has a -C option for testing purposes, but although
4671 the given file was scanned by exinext itself; it wasn't being passed on
4672 when Exim was called.
4674 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4675 an end-of-file indication when reading a command response.
4677 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4678 compiled. In many other places in Exim, IPv6 addresses are always
4679 recognized, so I have changed this. It also means that IPv4 domain
4680 literals of the form [IPV4:n.n.n.n] are now always recognized.
4682 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4683 used if the router is not running as root, for example, when verifying at
4684 ACL time, or when using -bh. The debugging output from this situation was
4685 non-existent - all you got was a failure to exec. I have made two
4688 (a) Failures to set uid/gid, the current directory, or a process leader
4689 in a subprocess such as that created by queryprogram now generate
4690 suitable debugging output when -d is set.
4692 (b) The queryprogram router detects when it is not running as root,
4693 outputs suitable debugging information if -d is set, and then runs
4694 the subprocess without attempting to change uid/gid.
4696 PH/15 Minor change to Makefile for building test_host (undocumented testing
4699 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4700 additional section of a DNS packet that returns MX or SRV records.
4701 Instead, it always explicitly searches for A/AAAA records. This avoids
4702 major problems that occur when a DNS server includes only records of one
4703 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4704 fixed another bug: if SRV records were looked up and the corresponding
4705 address records were *not* found in the additional section, the port
4706 values from the SRV records were lost.
4708 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4709 using the correct key (the original address) when searching the retry
4710 rules in order to find which one to use for generating the retry hint.
4712 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4713 adding the default one. Similarly, if it contains a Reply-To: header, the
4714 errors_reply_to option, if set, is not used.
4716 PH/19 When calculating a retry time, Exim used to measure the "time since
4717 failure" by looking at the "first failed" field in the retry record. Now
4718 it does not use this if it is later than than the arrival time of the
4719 message. Instead it uses the arrival time. This makes for better
4720 behaviour in cases where some deliveries succeed, thus re-setting the
4721 "first failed" field. An example is a quota failure for a huge message
4722 when small messages continue to be delivered. Without this change, the
4723 "time since failure" will always be short, possible causing more frequent
4724 delivery attempts for the huge message than are intended.
4725 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4727 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4728 $1, $2, $3) because the numerical variables can be reset during some
4729 expansion items (e.g. "match"), thereby losing the authentication data.
4731 PH/21 Make -bV show the size of off_t variables so that the test suite can
4732 decide whether to run tests for quotas > 2G.
4734 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4735 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4736 filecount value is greater than 2G or if a quota value is greater than 2G
4737 on a system where the size of off_t is not greater than 4, a panic error
4740 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4741 never match. The debug and -bh output now contains an explicit error
4742 message indicating a malformed IPv4 address or mask.
4744 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4745 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4746 PH/23 above applies.
4748 PH/25 Do not write to syslog when running in the test harness. The only
4749 occasion when this arises is a failure to open the main or panic logs
4750 (for which there is an explicit test).
4752 PH/26 Added the /no_tell option to "control=freeze".
4754 PH/27 If a host name lookup failed very early in a connection, for example, if
4755 the IP address matched host_lookup and the reverse lookup yielded a name
4756 that did not have a forward lookup, an error message of the form "no IP
4757 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4758 could be logged. Now it outputs the IP address instead of "NULL".
4760 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4761 allows the sender and the authenticated sender to be set when
4762 submitting a message from within Exim. Since child_open_exim() is
4763 documented for local_scan(), the new function should be too.
4765 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4766 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4767 results in an empty string is now treated as unset.
4769 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4771 PH/31 Added sender_verify_fail logging option.
4773 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4774 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4775 tidied the source and removed it altogether.
4777 PH/33 When a queue run was abandoned because the load average was too high, a
4778 log line was always written; now it is written only if the queue_run log
4779 selector is set. In addition, the log line for abandonment now contains
4780 information about the queue run such as the pid. This is always present
4781 in "start" and "stop" lines but was omitted from the "abandon" line.
4783 PH/34 Omit spaces between a header name and the colon in the error message that
4784 is given when verify = headers_syntax fails (if there are lots of them,
4785 the message gets confusing).
4787 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4788 names, as there are now some PTR records that contain slashes. This check
4789 is only to protect against broken name servers that fall over on strange
4790 characters, so the fact that it applies to all lookups doesn't matter.
4792 PH/36 Now that the new test suite is complete, we can remove some of the
4793 special code in Exim that was needed for the old test suite. For example,
4794 sorting DNS records because real resolvers return them in an arbitrary
4795 order. The new test suite's fake resolver always returns records in the
4798 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4799 bounces) except when queue_only is set, to avoid logging races between
4800 the different processes.
4802 PH/38 Panic-die if .include specifies a non-absolute path.
4804 PH/39 A tweak to the "H" retry rule from its user.
4806 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4807 a label. They prevented compilation on older perls.
4809 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4810 a warning to be raised on newish perls.
4812 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4813 on queue. Changes to match documented behaviour of showing count of
4814 messages matching specified criteria.
4816 PH/40 Changed the default ident timeout from 30s to 5s.
4818 PH/41 Added support for the use of login_cap features, on those BSD systems
4819 that have them, for controlling the resources used by pipe deliveries.
4821 PH/42 The content-scanning code uses fopen() to create files in which to put
4822 message data. Previously it was not paying any attention to the mode of
4823 the files. Exim runs with umask(0) because the rest of the code creates
4824 files with open(), and sets the required mode explicitly. Thus, these
4825 files were ending up world-writeable. This was not a big issue, because,
4826 being within the spool directory, they were not world-accessible. I have
4827 created a function called modefopen, which takes an additional mode
4828 argument. It sets umask(777), creates the file, chmods it to the required
4829 mode, then resets the umask. All the relevant calls to fopen() in the
4830 content scanning code have been changed to use this function.
4832 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4833 to 24 hours. This avoids potential overflow problems when processing G
4834 and H retry rules. I suspect nobody ever tinkers with this value.
4836 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4838 PH/45 When the plaintext authenticator is running as a client, the server's
4839 challenges are checked to ensure they are valid base64 strings. By
4840 default, the authentication attempt is cancelled if an invalid string is
4841 received. Setting client_ignore_invalid_base64 true ignores these errors.
4842 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4843 they are received. Thus, the responses can be made to depend on the
4844 challenges. If an invalid string is ignored, an empty string is placed in
4847 PH/46 Messages that are created by the autoreply transport now contains a
4848 References: header, in accordance with RFCs 2822 and 3834.
4850 PH/47 Added authenticated_sender_force to the smtp transport.
4852 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4854 PH/49 Installed latest patch from the Sieve maintainer.
4856 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4857 was also set, the appendfile transport was unnecessarily scanning a
4858 directory of message files (e.g. for maildir delivery) to find the count
4859 of files (along with the size), even though it did not need this
4860 information. It now does the scan only if it needs to find either the
4861 size of the count of files.
4863 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4865 PH/52 Two bugs concerned with error handling when the smtp transport is
4868 (i) Exim was not creating retry information for temporary errors given
4869 for individual recipients after the DATA command when the smtp transport
4870 was used in LMTP mode. This meant that they could be retried too
4871 frequently, and not timed out correctly.
4873 (ii) Exim was setting the flag that allows error details to be returned
4874 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4875 recipients that were returned after the DATA command.
4877 PH/53 This is related to PH/52, but is more general: for any failing address,
4878 when detailed error information was permitted to be returned to the
4879 sender, but the error was temporary, then after the final timeout, only
4880 "retry timeout exceeded" was returned. Now it returns the full error as
4881 well as "retry timeout exceeded".
4883 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4884 do this, and (what is worse) MTAs that accept it.
4886 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4887 will now be deprecated.
4889 PH/56 New os.c-cygwin from the Cygwin maintainer.
4891 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4892 formats (previously only available in exim formats via -bpr, -bpru,
4893 and -bpra. Now also available in native and exiqgrep formats)
4895 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4896 with very large, slow to parse queues
4898 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4900 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4902 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4903 responses to authentication challenges, though it was showing the
4904 challenges; (ii) I've removed the CR characters from the debug output for
4907 PH/58 Allow for the insertion of a newline as well as a space when a string
4908 is turned into more than one encoded-word during RFC 2047 encoding. The
4909 Sieve code now uses this.
4911 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4912 data_4xx, lost_connection, tls_required.
4914 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4915 message was being sent as an SMTP response.
4917 PH/61 Add -l and -k options to exicyclog.
4919 PH/62 When verifying, if an address was redirected to one new address, so that
4920 verification continued, and the new address failed or deferred after
4921 having set something in $address_data, the value of $address_data was not
4922 passed back to the ACL. This was different to the case when no
4923 redirection occurred. The value is now passed back in both cases.
4925 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4926 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4927 use login_cap.h, so on its own it isn't the distinguishing feature. The
4928 new name refers directly to the setclassresources() function.
4930 PH/65 Added configuration files for NetBSD3.
4932 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4934 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4935 is preferred over IPv4.
4937 PH/68 The bounce_return_message and bounce_return_body options were not being
4938 honoured for bounces generated during the reception of non-SMTP messages.
4939 In particular, this applied to messages rejected by the ACL. This bug has
4940 been fixed. However, if bounce_return_message is true and bounce_return_
4941 body is false, the headers that are returned for a non-SMTP message
4942 include only those that have been read before the error was detected.
4943 (In the case of an ACL rejection, they have all been read.)
4945 PH/69 The HTML version of the specification is now built in a directory called
4946 spec_html instead of spec.html, because the latter looks like a path with
4947 a MIME-type, and this confuses some software.
4949 PH/70 Catch two compiler warnings in sieve.c.
4951 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4952 function verify_get_ident() calls ip_connect() to connect a socket, but
4953 if the "connect()" function timed out, ip_connect() used to close the
4954 socket. However, verify_get_ident() also closes the socket later, and in
4955 between Exim writes to the log, which may get opened at this point. When
4956 the socket was closed in ip_connect(), the log could get the same file
4957 descriptor number as the socket. This naturally causes chaos. The fix is
4958 not to close the socket in ip_connect(); the socket should be closed by
4959 the function that creates it. There was only one place in the code where
4960 this was missing, in the iplookup router, which I don't think anybody now
4961 uses, but I've fixed it anyway.
4963 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4964 well as to direct DNS lookups. Otherwise the handling of names in host
4965 lists is inconsistent and therefore confusing.
4971 PH/01 Two changes to the default runtime configuration:
4973 (1) Move the checks for relay_from_hosts and authenticated clients from
4974 after to before the (commented out) DNS black list checks.
4976 (2) Add control=submission to the relay_from_hosts and authenticated
4977 clients checks, on the grounds that messages accepted by these
4978 statements are most likely to be submissions.
4980 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4982 (1) Generate an error if the third argument for the ${prvs expansion is
4985 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4988 (3) Reset the variables that are obtained from the first argument of
4989 ${prvscheck and used in the second argument before leaving the code,
4990 because their memory is reclaimed, so using them afterwards may do
4993 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4994 one (it's much easier than Tom thought :-).
4996 (5) Because of (4), we can now allow for the use of $prvscheck_result
4997 inside the third argument.
4999 PH/03 For some reason, the default setting of PATH when running a command from
5000 a pipe transport was just "/usr/bin". I have changed it to
5003 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5004 anything to be listed in the output from -bV.
5006 PH/05 When a filter generated an autoreply, the entire To: header line was
5007 quoted in the delivery log line, like this:
5009 => >A.N.Other <ano@some.domain> <original@ddress> ...
5011 This has been changed so that it extracts the operative address. There
5012 may be more than one such address. If so, they are comma-separated, like
5015 => >ano@some.domain,ona@other.domain <original@ddress> ...
5017 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5018 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5019 not being looked up in the rDNS to get a host name, Exim was showing the
5020 IP address twice in Received: lines, even though the IP addresses were
5021 identical. For example:
5023 Received: from [1.2.3.4] (helo=[1.2.3.4])
5025 However, if the real host name was known, it was omitting the HELO data
5026 if it matched the actual IP address. This has been tidied up so that it
5027 doesn't show the same IP address twice.
5029 PH/07 When both +timestamp and +memory debugging was on, the value given by
5030 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5031 called by the debug printing, thereby overwriting the timestamp buffer.
5032 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5034 PH/08 When the original message was included in an autoreply transport, it
5035 always said "this is a copy of the message, including all the headers",
5036 even if body_only or headers_only was set. It now gives an appropriate
5039 PH/09 Applied a patch from the Sieve maintainer which:
5041 o fixes some comments
5042 o adds the (disabled) notify extension core
5043 o adds some debug output for the result of if/elsif tests
5044 o points to the current vacation draft in the documentation
5045 and documents the missing references header update
5049 o fixes a bug in processing the envelope test (when testing
5050 multiple envelope elements, the last element determined the
5053 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5054 Electronic Mail") by including:
5056 Auto-submitted: auto-generated
5058 in the messages that it generates (bounce messages and others, such as
5059 warnings). In the case of bounce messages for non-SMTP messages, there was
5060 also a typo: it was using "Auto_submitted" (underscore instead of
5061 hyphen). Since every message generated by Exim is necessarily in response
5062 to another message, thes have all been changed to:
5064 Auto-Submitted: auto-replied
5066 in accordance with these statements in the RFC:
5068 The auto-replied keyword:
5070 - SHOULD be used on messages sent in direct response to another
5071 message by an automatic process,
5073 - MUST NOT be used on manually-generated messages,
5075 - MAY be used on Delivery Status Notifications (DSNs) and Message
5076 Disposition Notifications (MDNs),
5078 - MUST NOT be used on messages generated by automatic or periodic
5079 processes, except for messages which are automatic responses to
5082 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5083 to the default Received: header definition.
5085 PH/12 Added log selector acl_warn_skipped (default on).
5087 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5088 variables because (a) they are in the wrong storage pool and (b) even if
5089 they were copied, it wouldn't work properly because of the caching.
5091 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5092 checking when decoding. Apparently there are clients that generate
5093 overlong encoded strings. Why am I not surprised?
5095 PH/15 If the first argument of "${if match_address" was not empty, but did not
5096 contain an "@" character, Exim crashed. Now it writes a panic log message
5097 and treats the condition as false.
5099 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5101 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5102 extension "envelope-auth". The code is finished and in agreement with
5103 other implementations, but there is no documentation so far and in fact,
5104 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5105 not changing the active code.
5107 Print executed "if" and "elsif" statements when debugging is used. This
5108 helps a great deal to understand what a filter does.
5110 Document more things not specified clearly in RFC3028. I had all this
5111 sorted out, when out of a sudden new issues came to my mind. Oops."
5113 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5116 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5117 canonical form (as documented). However, after a host name lookup from
5118 the IP address, check_host() was doing a simple string comparison with
5119 addresses acquired from the DNS when checking that the found name did
5120 have the original IP as one of its addresses. Since any found IPv6
5121 addresses are likely to be in abbreviated form, the comparison could
5122 fail. Luckily, there already exists a function for doing the comparison
5123 by converting both addresses to binary, so now that is used instead of
5124 the text comparison.
5126 PH/20 There was another similar case to PH/19, when a complete host name was
5127 given in a host list; looking up its IP address could give an abbreviated
5128 form, whereas the current host's name might or might not be abbreviated.
5129 The same fix has been applied.
5135 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5136 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5139 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5140 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5142 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5144 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5145 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5146 Also, for "Auto-Submitted", treat anything other than "no" as
5147 non-personal, in accordance with RFC 3834. (Previously it treated
5148 anything starting "auto-" as non-personal.)
5150 TF/01 The control=submission/name=... option had a problem with syntax
5151 errors if the name included a slash character. The /name= option
5152 now slurps the rest of the string, so it can include any characters
5153 but it must come last in the list of options (after /sender_retain
5156 PH/05 Some modifications to the interface to the fake nameserver for the new
5164 TK/01 Added the "success_on_redirect" address verification option. See
5165 NewStuff for rationale and an example.
5167 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5169 PH/02 Patch to exigrep to allow it to work on syslog lines.
5171 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5172 fread() to skip over the body file's header line, because in Cygwin the
5173 header line is locked and is inaccessible.
5175 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5176 co-exist for some time) to make it clear that it is the Exim ID that is
5177 referenced, not the Message-ID: header line.
5179 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5180 string_format() function, because snprintf() does not exist on all
5183 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5184 ${stat: expansion item.
5186 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5187 protocol synchronization error", to keep the pedants happy.
5189 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5190 well as for IRIX systems, when gcc is being used. See the host.c source
5193 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5195 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5198 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5199 transport and to the smtp transport in LMTP mode.
5201 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5203 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5204 run a filter in a subprocess. This could lead to confusion in subsequent
5205 lookups in the parent process. There should also be a search_tidyup() at
5206 the end of the subprocess.
5208 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5209 only if the host matched helo_try_verify_hosts, which caused the
5210 verification to occur when the EHLO/HELO command was issued. The ACL just
5211 tested the remembered result. Now, if a previous verification attempt has
5212 not happened, "verify = helo" does it there and then.
5214 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5216 TK/03 Fix log output including CR from clamd.
5218 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5219 exist provoked a memory error which could cause a segfault.
5221 PH/15 Installed PCRE 6.2
5223 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5225 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5226 of the problem. Specifically, suggested +O2 rather than +O1 for the
5229 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5231 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5232 record, the port was not correctly logged when the outgoing_port log
5233 selector was set (it logged the transort's default port).
5235 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5236 fallback_hosts, and "hosts" in the smtp transport.
5238 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5239 host errors such as "Connection refused".
5241 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5242 authentication with radiusclient 0.4.9:
5244 - Error returned from rc_read_config was caught wrongly
5245 - Username/password not passed on to radius server due to wrong length.
5247 The presumption is that some radiusclient API changes for 4.51/PH/17
5248 were not taken care of correctly. The code is still untested by me (my
5249 Linux distribution still has 0.3.2 of radiusclient), but it was
5250 contributed by a Radius user.
5252 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5253 expanding the "port" option of the smtp transport.
5255 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5256 while reading a MIME header. Thanks to Tom Hughes for a patch.
5258 PH/24 Include config.h inside local_scan.h so that configuration settings are
5261 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5262 that in an ACL for RCPT (for example), you can examine exactly what was
5265 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5266 commands, but it was not correctly comparing the address with the actual
5267 client host address. Thus, it would show the EHLO address in Received:
5268 header lines when this was not necessary.
5270 PH/27 Added the % operator to ${eval:}.
5272 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5273 it should be ignoring failures (because with -C, for example, it has lost
5274 privilege). It wasn't ignoring creation failures other than "already
5277 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5280 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5281 because an input line was too long, either on its own, or by virtue of
5282 too many continuations, the temporary file was not being removed, and the
5283 return code was incorrect.
5285 PH/31 Missing "BOOL" in function definition in filtertest.c.
5287 PH/32 Applied Sieve patches from the maintainer.
5289 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5291 PH/33 Added "verify = not_blind".
5293 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5294 Local/Makefile (with some defaults set). These are used in built scripts
5295 such as exicyclog, but they have never been used in the exim_install
5296 script (though there are many overriding facilities there). I have
5297 arranged that the exim_install script now takes note of these two
5300 PH/35 Installed configuration files for Dragonfly.
5302 PH/36 When a locally submitted message by a trusted user did not contain a
5303 From: header, and the sender address was obtained from -f or from an SMTP
5304 MAIL command, and the trusted user did not use -F to supply a sender
5305 name, $originator_name was incorrectly used when constructing a From:
5306 header. Furthermore, $originator_name was used for submission mode
5307 messages from external hosts without From: headers in a similar way,
5308 which is clearly wrong.
5310 PH/37 Added control=suppress_local_fixups.
5312 PH/38 When log_selector = +received_sender was set, and the addition of the
5313 sender made the log line's construction buffer exactly full, or one byte
5314 less than full, an overflow happened when the terminating "\n" was
5317 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5318 when the result of a list match is failure because a DNS lookup failed.
5320 PH/40 RM_COMMAND is now used in the building process.
5322 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5323 the "build-* directories that it finds.
5325 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5326 address in a domain literal was a prefix of an interface address.
5328 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5329 when verifying a sender address, unless rewrite_headers is false.
5331 PH/44 Wrote a long comment about why errors_to addresses are verified as
5332 recipients, not senders.
5334 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5335 the ratelimit ACL was added.
5337 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5339 PH/46 Added extra information about PostgreSQL errors to the error string.
5341 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5342 avoiding the need to install special zones in a real server. This is
5343 backwards compatible; if it can't find the fake resolver, it drops back.
5344 Thus, both old and new test suites can be run.
5346 TF/02 Added util/ratelimit.pl
5348 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5349 clock is set back in time.
5351 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5352 Candler <B.Candler@pobox.com>.
5354 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5355 OK for addresses that are the result of redirections.
5357 PH/48 A number of further additions for the benefit of the new test suite,
5358 including a fake gethostbyname() that interfaces to the fake DNS resolver
5361 TF/06 The fix for widen_domains has also been applied to qualify_single and
5362 search_parents which are the other dnslookup options that can cause
5365 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5368 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5370 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5371 service" if it encountered an MX record with an empty target hostname.
5372 The message is now "an MX or SRV record indicated no SMTP service".
5374 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5375 if the DNS of the sending site is misconfigured. This is quite a
5376 common situation. This change restores the behaviour of treating a
5377 helo verification defer as a failure.
5379 PH/51 If self=fail was set on a router, the bounce message did not include the
5380 actual error message.
5386 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5388 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5389 command itself ended in error, the underlying message about the transport
5390 filter timeout was being overwritten with the pipe command error. Now the
5391 underlying error message should be appended to the second error message.
5393 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5395 PH/02 Reduce the amount of output that "make" produces by default. Full output
5396 can still be requested.
5398 PH/03 The warning log line about a condition test deferring for a "warn" verb
5399 was being output only once per connection, rather than after each
5400 occurrence (because it was using the same function as for successful
5401 "warn" verbs). This seems wrong, so I have changed it.
5403 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5404 it should not have, which might have caused a crash in the right
5405 circumstances, but probably never did.
5407 PH/04 Installed a modified version of Tony Finch's patch to make submission
5408 mode fix the return path as well as the Sender: header line, and to
5409 add a /name= option so that you can make the user's friendly name appear
5412 TF/03 Added the control = fakedefer ACL modifier.
5414 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5415 Mark Lowes for thorough testing.
5417 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5419 TK/03 Merged latest SRS patch from Miles Wilton.
5421 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5422 with the definition in sysexits.h (which is #included earlier).
5423 Fortunately, Exim does not actually use EX_OK. The code used to try to
5424 preserve the sysexits.h value, by assuming that macro definitions were
5425 scanned for macro replacements. I have been disabused of this notion,
5426 so now the code just undefines EX_OK before #including unistd.h.
5428 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5429 in the smtp transport. When a block could not be written in a single
5430 write() function, the timeout was being re-applied to each part-write.
5431 This seems wrong - if the receiver was accepting one byte at a time it
5432 would take for ever. The timeout is now adjusted when this happens. It
5433 doesn't have to be particularly precise.
5435 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5436 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5438 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5439 without a domain if the check to <postmaster@domain> fails.
5441 SC/01 Eximstats: added -xls and the ability to specify output files
5442 (patch written by Frank Heydlauf).
5444 SC/02 Eximstats: use FileHandles for outputting results.
5446 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5448 SC/04 Eximstats: fixed display of large numbers with -nvr option
5450 SC/05 Eximstats: fixed merging of reports with empty tables.
5452 SC/06 Eximstats: added the -include_original_destination flag
5454 SC/07 Eximstats: removed tabs and trailing whitespace.
5456 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5458 TK/06 MBOX spool code: Add real "From " MBOX separator line
5459 so the .eml file is really in mbox format (even though
5460 most programs do not really care). Patch from Alex Miller.
5462 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5463 The latter is generated from $received_to and is only set if the
5464 message has one envelope recipient. SA can use these headers,
5465 obviously out-of-the-box. Patch from Alex Miller.
5467 PH/08 The ${def test on a variable was returning false if the variable's
5468 value was "0", contrary to what the specification has always said!
5469 The result should be true unless the variable is empty.
5471 PH/09 The syntax error of a character other than { following "${if
5472 def:variable_name" (after optional whitespace) was not being diagnosed.
5473 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5474 accidental colon was present, for example, could give incorrect results.
5476 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5477 result is used (not including appendfile, where other changes are about
5480 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5481 This involved changing a lot of size variables from int to off_t. It
5482 should work with maildirs and everything.
5484 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5485 spamd dying while we are connected to it.
5487 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5490 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5491 function for BDB 4.3.
5493 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5495 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5496 the sources for PCRE have been re-arranged and more files are now
5499 PH/15 The code I had for printing potentially long long variables in PH/11
5500 above was not the best (it lost precision). The length of off_t variables
5501 is now inspected at build time, and an appropriate printing format (%ld
5502 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5503 to be "long long int" or "long int". This is needed for the internal
5504 formatting function string_vformat().
5506 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5507 the configuration file to be ":syslog", then the script "guesses" where
5508 the logs files are, rather than using the compiled in default. In our
5509 case the guess is not the same as the compiled default, so the script
5510 suddenly stopped working when I started to use syslog. The patch checks
5511 to see if log_file_path is "". If so, it attempts to read it from exim
5512 with no configuration file to get the compiled in version, before it
5513 falls back to the previous guessing code."
5515 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5516 implementing BATV in an Exim configuration. See NewStuff for the gory
5519 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5520 Makefile that are specific to HP-UX.
5522 PH/18 If the "use_postmaster" option was set for a recipient callout together
5523 with the "random" option, the postmaster address was used as the MAIL
5524 FROM address for the random test, but not for the subsequent recipient
5525 test. It is now used for both.
5527 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5528 patch removes a few documentation additions to RFC 3028, because the
5529 latest draft now contains them. It adds the new en;ascii-case comparator
5530 and a new error check for 8bit text in MIME parts. Comparator and
5531 require names are now matched exactly. I enabled the subaddress
5532 extension, but it is not well tested yet (read: it works for me)."
5534 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5535 rework some of the code of TK/09 above to avoid the hardwired use of
5536 "%lld" and "long long". Replaced the call to snprintf() with a call to
5539 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5540 records point to non-existent hosts", "retry timeout exceeded", and
5541 "retry time not reached for any host after a long failure period".
5543 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5544 experimental DomainKeys support:
5546 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5547 (2) On an error such as an illegally used "control", the wrong name for
5548 the control was given.
5550 These problems did NOT occur unless DomainKeys support was compiled.
5552 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5554 PH/24 Added ${if match_ip condition.
5556 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5557 databases so that it will be absolutely obvious if a crash occurs in the
5558 DB library. This is a regular occurrence (often caused by mis-matched
5561 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5562 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5563 picked up on a user's system that detects such things. There doesn't seem
5564 to be a gcc warning option for this - only an attribute that has to be
5565 put on the function's prototype. It seems that in Fedora Core 4 they have
5566 set this on a number of new functions. No doubt there will be more in due
5569 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5570 specify a transport. However, if an address that was verified by such a
5571 router was the subject of a callout, Exim crashed because it tried to
5572 read the rcpt_include_affixes from the non-existent transport. Now it
5573 just assumes that the setting of that option is false. This bug was
5574 introduced by 4.51/PH/31.
5576 PH/28 Changed -d+all to exclude +memory, because that information is very
5577 rarely of interest, but it makes the output a lot bigger. People tend to
5578 do -d+all out of habit.
5580 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5581 code in os-type was giving problems when libc.so lives in lib64, like on
5584 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5585 aren't the modern standard, and it seems that some systems' include files
5586 don't always have them. Exim was already checking for some of the newer
5587 ones like T_AAAA, and defining it itself. I've added checks for all the
5588 record types that Exim uses.
5590 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5591 not automatically generating a new one, as it is supposed to. This
5592 prevented TLS from working. If the file did exist, but contained invalid
5593 data, a new version was generated, as expected. It was only the case of a
5594 non-existent file that was broken.
5596 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5597 with a change in libdomainkeys > 0.64.
5599 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5600 from DNS. If the selector record carries the flag, it now has
5601 precedence over the domain-wide flag.
5603 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5605 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5606 the use of a port name that isn't defined in /etc/services) occurred, the
5607 message was deferred as in a normal delivery, and thus remained on the
5608 spool, instead of being failed because of the mua_wrapper setting. This
5609 is now fixed, and I tidied up some of the mua_wrapper messages at the
5612 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5613 the messages in a hash of arrays rather than using individual hashes.
5614 This is a bit cleaner and results in dramatic memory savings, albeit
5615 at a slight CPU cost.
5617 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5618 as requested by Marc Sherman.
5620 SC/10 Eximstats: added histograms for user specified patterns as requested
5623 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5625 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5626 fopen() in the content-scanning modules that did not already have it.
5632 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5633 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5635 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5637 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5639 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5640 to test Sieve filters that use "vacation".
5642 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5643 that changes the way the GnuTLS parameters are stored in the cache file.
5644 The new format can be generated externally. For backward compatibility,
5645 if the data in the cache doesn't make sense, Exim assumes it has read an
5646 old-format file, and it generates new data and writes a new file. This
5647 means that you can't go back to an older release without removing the
5650 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5651 work if there are any delivery delays because "one_time" forces the
5652 parent to be marked "delivered", so its unseen clone is never tried
5653 again. For this reason, Exim now forbids the simultaneous setting of
5656 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5657 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5658 entry if you want to know the details. The fix, however, neglected to
5659 consider the case when local delivery batching is involved. The test for
5660 "previously delivered" was not happening when checking to see if an
5661 address could be batched with a previous (undelivered) one; under
5662 certain circumstances this could lead to multiple deliveries to the same
5665 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5666 in its include files, and this causes problems building Exim.
5668 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5669 header_syntax) but Exim was just ignoring anything given after a slash.
5670 In particular, this caused confusion with an attempt to use "verify =
5671 reverse_host_lookup/defer_ok". An error is now given when options are
5672 supplied for verify items that do not have them. (Maybe reverse_host_
5673 lookup should have a defer_ok option, but that's a different point.)
5675 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5676 defined by RFC 821) to 2048, because there were problems with some AUTH
5677 commands, and RFC 1869 says the size should be increased for extended
5678 SMTP commands that take arguments.
5680 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5683 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5684 "unknown" error; now it says that the functionality isn't in the binary.
5686 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5687 an address' error message when a string expansion fails (syntax or
5688 whatever). Otherwise the password may appear in the log. Following change
5689 PH/42 below, there is no longer a chance of it appearing in a bounce
5692 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5694 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5695 of its addresses was ever tried. (Bugzilla bug #2.)
5697 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5698 the result incorrectly in the debug output. (It correctly added a newline
5699 to what was transported.)
5701 TF/01 Added $received_time.
5703 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5704 commented out examples of how to interface to a virus scanner and to
5705 SpamAssassin. Also added commented examples of av_scanner and
5706 spamd_address settings.
5708 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5709 and controls are allowed in which ACLs. There were a couple of minor
5710 errors. Some of the entries in the conditions table (which is a table of
5711 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5712 negation of where the condition IS allowed.
5714 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5716 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5717 header file does not have a version number, so I've had to invent a new
5718 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5719 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5720 radiusclient), but it was contributed by a Radius user.
5722 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5723 files or directories, for OpenSSL.
5725 PH/19 When an Exim process that is running as root has to create an Exim log
5726 file, it does so in a subprocess that runs as exim:exim so as to get the
5727 ownership right at creation (otherwise, other Exim processes might see
5728 the file with the wrong ownership). There was no test for failure of this
5729 fork() call, which would lead to the process getting stuck as it waited
5730 for a non-existent subprocess. Forks do occasionally fail when resources
5731 run out. I reviewed all the other calls to fork(); they all seem to check
5734 PH/20 When checking for unexpected SMTP input at connect time (before writing
5735 the banner), Exim was not dealing correctly with a non-positive return
5736 from the read() function. If the client had disconnected by this time,
5737 the result was a log entry for a synchronization error with an empty
5738 string after "input=" when read() returned zero. If read() returned -1
5739 (an event I could not check), uninitialized data bytes were printed.
5740 There were reports of junk text (parts of files, etc) appearing after
5743 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5745 PH/22 Added support for macro redefinition, and (re)definition in between
5746 driver and ACL definitions.
5748 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5749 forgetting to use the resulting value; it was using the unexpanded value.
5751 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5752 hadn't been configured. The fix is from Juergen Kreileder, who
5753 understands it better than I do:
5755 "Here's what I see happening with three configured cyrus_sasl
5756 authenticators configured (plain, login, cram-md5):
5758 On startup auth_cyrus_sasl_init() gets called for each of these.
5759 This means three calls to sasl_listmech() without a specified mech_list.
5760 => SASL tests which mechs of all available mechs actually work
5761 => three warnings about OTP not working
5762 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5764 With the patch, sasl_listmech() also gets called three times. But now
5765 SASL's mech_list option is set to the server_mech specified in the the
5766 authenticator. Or in other words, the answer from sasl_listmech()
5767 gets limited to just the mech you're testing for (which is different
5769 => the return list contains just 'plain' or 'login', 'cram-md5' or
5770 nothing depending on the value of ob->server_mech.
5772 I've just tested the patch: Authentication still works fine,
5773 unavailable mechs specified in the exim configuration are still
5774 caught, and the auth.log warnings about OTP are gone."
5776 PH/25 When debugging is enabled, the contents of the command line are added
5777 to the debugging output, even when log_selector=+arguments is not
5780 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5781 answer is "GNU", and only if the return is "GNU/something" is the answer
5784 PH/27 $acl_verify_message is now set immediately after the failure of a
5785 verification in an ACL, and so is available in subsequent modifiers. In
5786 particular, the message can be preserved by coding like this:
5788 warn !verify = sender
5789 set acl_m0 = $acl_verify_message
5791 Previously, $acl_verify_message was set only while expanding "message"
5792 and "log_message" when a very denied access.
5794 PH/28 Modified OS/os.c-Linux with
5796 -#ifndef OS_LOAD_AVERAGE
5797 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5799 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5800 nomenclature these days.)
5802 PH/29 Installed patch from the Sieve maintainer that adds the options
5803 sieve_useraddress and sieve_subaddress to the redirect router.
5805 PH/30 In these circumstances:
5806 . Two addresses routed to the same list of hosts;
5807 . First host does not offer TLS;
5808 . First host accepts first address;
5809 . First host gives temporary error to second address;
5810 . Second host offers TLS and a TLS session is established;
5811 . Second host accepts second address.
5812 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5813 and peerdn, if requested) that were in fact used only for the second
5816 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5817 attention to any local part prefix or suffix that was matched by the
5818 router that accepted the address. It now behaves in the same way as it
5819 does for delivery: the affixes are removed from the local part unless
5820 rcpt_include_affixes is set on the transport.
5822 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5823 timeout during the DATA phase of an incoming message.
5825 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5826 applied a patch sanctioned by the Sieve maintainer.
5828 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5829 the uid or gid is negative. A case of a negative gid caused this to be
5830 noticed. The fix allows for either to be negative.
5832 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5833 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5836 PH/36 The change PH/12 above was broken. Fixed it.
5838 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5839 the grounds that routing the same address twice would always produce the
5840 same answer. This might have been true once, but it is certainly no
5841 longer true now. Routing a child address may depend on the previous
5842 routing that produced that child. Some complicated redirection strategies
5843 went wrong when messages had multiple recipients, and made Exim's
5844 behaviour dependent on the order in which the addresses were given.
5846 I have moved the duplicate checking until after the routing is complete.
5847 Exim scans the addresses that are assigned to local and remote
5848 transports, and removes any duplicates. This means that more work will be
5849 done, as duplicates will always all be routed, but duplicates are
5850 presumably rare, so I don't expect this is of any significance.
5852 For deliveries to pipes, files, and autoreplies, the duplicate checking
5853 still happens during the routing process, since they are not going to be
5856 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5857 It corrects a timeout issue with spamd. This is Ian's comment: "The
5858 background is that sometimes spamd either never reads data from a
5859 connection it has accepted, or it never writes response data. The exiscan
5860 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5861 blindly assumes that writes won't block so it may never time out."
5863 PH/39 Allow G after quota size as well as K and M.
5865 PH/40 The value set for $authenticated_id in an authenticator may not contain
5866 binary zeroes or newlines because the value is written to log lines and
5867 to spool files. There was no check on this. Now the value is run through
5868 the string_printing() function so that such characters are converted to
5869 printable escape sequences.
5871 PH/41 $message_linecount is a new variable that contains the total number of
5872 lines in the message. Compare $body_linecount, which is the count for the
5875 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5876 bounce and delay warning messages, except in certain special cases, which
5879 (a) An SMTP error message from a remote host;
5880 (b) A message specified in a :fail: redirection;
5881 (c) A message specified in a "fail" command in a system filter;
5882 (d) A message specified in a FAIL return from the queryprogram router;
5883 (e) A message specified by the cannot_route_message router option.
5885 In these cases only, Exim does include the error details in bounce and
5886 warning messages. There are also a few cases where bland messages such
5887 as "unrouteable address" or "local delivery error" are given.
5889 PH/43 $value is now also set for the "else" part of a ${run expansion.
5891 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5892 being worked on, but at least Exim now implements the latest version to
5895 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5896 process to complete was treated as a delivery failure, a timeout while
5897 writing the message to the pipe was logged, but erroneously treated as a
5898 successful delivery. Such timeouts include transport filter timeouts. For
5899 consistency with the overall process timeout, these timeouts are now
5900 treated as errors, giving rise to delivery failures by default. However,
5901 there is now a new Boolean option for the pipe transport called
5902 timeout_defer, which, if set TRUE, converts the failures into defers for
5903 both kinds of timeout. A transport filter timeout is now identified in
5906 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5907 systems where "make" and "gmake" are different, calling "gmake" at top
5908 level broke things. I've arranged for the value of $(MAKE) to be passed
5909 from the Makefile to this script so that it can call the same version of
5913 A note about Exim versions 4.44 and 4.50
5914 ----------------------------------------
5916 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5917 changes of various kinds. As a consequence, a big documentation update was
5918 needed. This delayed the release for rather longer than seemed good, especially
5919 in the light of a couple of (minor) security issues. Therefore, the changes
5920 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5921 release. So 4.44 and 4.50 are in effect two different branches that both start
5924 I have left the 4.50 change log unchanged; it contains all the changes since
5925 4.43. The change log for 4.44 is below; many of its items are identical to
5926 those for 4.50. This seems to be the most sensible way to preserve the
5927 historical information.
5933 1. Minor wording change to the doc/README.SIEVE file.
5935 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5936 computation of the current number of files was incorrect.
5938 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5939 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5942 4. Give more explanation in the error message when the command for a transport
5943 filter fails to execute.
5945 5. There are several places where Exim runs a non-Exim command in a
5946 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5947 was being done only for the command run by the queryprogram router. It is
5948 now done for all such subprocesses. The other cases are: ${run, transport
5949 filters, and the commands run by the lmtp and pipe transports.
5951 6. Added CONFIGURE_GROUP build-time option.
5953 7. Some older OS have a limit of 256 on the maximum number of file
5954 descriptors. Exim was using setrlimit() to set 1000 as a large value
5955 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5956 systems. I've change it so that if it can't get 1000, it tries for 256.
5958 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5959 was an oversight, and furthermore, ever since the addition of extra
5960 controls (e.g. 4.43/32), the checks on when to allow different forms of
5961 "control" were broken. There should now be diagnostics for all cases when a
5962 control that does not make sense is encountered.
5964 9. Added the /retain_sender option to "control=submission".
5966 10. $recipients is now available in the predata ACL (oversight).
5968 11. Tidy the search cache before the fork to do a delivery from a message
5969 received from the command line. Otherwise the child will trigger a lookup
5970 failure and thereby defer the delivery if it tries to use (for example) a
5971 cached ldap connection that the parent has called unbind on.
5973 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5974 of $address_data from the recipient verification was clobbered by the
5975 sender verification.
5977 13. The value of address_data from a sender verification is now available in
5978 $sender_address_data in subsequent conditions in the ACL statement.
5980 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5982 15. Added a new option "connect=<time>" to callout options, to set a different
5985 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5986 was its contents. (It was OK if the option was not defined at all.)
5988 17. A "Completed" log line is now written for messages that are removed from
5989 the spool by the -Mrm option.
5991 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5992 information about exactly what failed.
5994 19. Added -dd to debug only the daemon process.
5996 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5997 handles timeouts, both on the server side and network timeouts. Renamed the
5998 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6000 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6001 It is now set to "smtps".
6003 22. $host_address is now set to the target address during the checking of
6004 ignore_target_hosts.
6006 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6007 being passed; this would have caused $sender_host_name to have been used if
6008 matching the list had actually called for a host name (not very likely,
6009 since this list is usually IP addresses). A host name is now passed as
6012 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6013 code that specifies a non-restarting handler (typically sigaction() in
6014 modern systems) in an attempt to fix a rare and obscure crash bug.
6016 25. Narrowed the window for a race in the daemon that could cause it to ignore
6017 SIGCHLD signals. This is not a major problem, because they are used only to
6018 wake it up if nothing else does.
6020 26. A malformed maildirsize file could cause Exim to calculate negative values
6021 for the mailbox size or file count. Odd effects could occur as a result.
6022 The maildirsize information is now recalculated if the size or filecount
6025 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6026 support for a long time. Removed HAVE_SYS_VFS_H.
6028 28. Installed the latest version of exipick from John Jetmore.
6030 29. In an address list, if the pattern was not a regular expression, an empty
6031 subject address (from a bounce message) matched only if the pattern was an
6032 empty string. Non-empty patterns were not even tested. This was the wrong
6033 because it is perfectly reasonable to use an empty address as part of a
6034 database query. An empty address is now tested by patterns that are
6035 lookups. However, all the other forms of pattern expect the subject to
6036 contain a local part and a domain, and therefore, for them, an empty
6037 address still always fails if the pattern is not itself empty.
6039 30. Exim went into a mad DNS loop when attempting to do a callout where the
6040 host was specified on an smtp transport, and looking it up yielded more
6041 than one IP address.
6043 31. Re-factored the code for checking spool and log partition space into a
6044 function that finds that data and another that does the check. The former
6045 is then used to implement four new variables: $spool_space, $log_space,
6046 $spool_inodes, and $log_inodes.
6048 32. The RFC2047 encoding function was originally intended for short strings
6049 such as real names; it was not keeping to the 75-character limit for
6050 encoded words that the RFC imposes. It now respects the limit, and
6051 generates multiple encoded words if necessary. To be on the safe side, I
6052 have increased the buffer size for the ${rfc2047: expansion operator from
6055 33. It is now permitted to omit both strings after an "if" condition; if the
6056 condition is true, the result is "true". As before, when the second string
6057 is omitted, a false condition yields an empty string. This makes it less
6058 cumbersome to write custom ACL and router conditions.
6060 34. Failure to deliver a bounce message always caused it to be frozen, even if
6061 there was an errors_to setting on the router. The errors_to setting is now
6064 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6065 canonical form (fully expanded) before being placed in
6066 $sender_host_address.
6068 36. The table in the code that translates DNS record types into text (T_A to
6069 "A" for instance) was missing entries for NS and CNAME. It is just possible
6070 that this could have caused confusion if both these types were looked up
6071 for the same domain, because the text type is used as part of Exim's
6072 per-process caching. But the chance of anyone hitting this buglet seems
6075 37. The dnsdb lookup has been extended in a number of ways.
6077 (1) There is a new type, "zns", which walks up the domain tree until it
6078 finds some nameserver records. It should be used with care.
6080 (2) There is a new type, "mxh", which is like "mx" except that it returns
6081 just the host names, not the priorities.
6083 (3) It is now possible to give a list of domains (or IP addresses) to be
6084 looked up. The behaviour when one of the lookups defers can be
6085 controlled by a keyword.
6087 (4) It is now possible to specify the separator character for use when
6088 multiple records are returned.
6090 38. The dnslists ACL condition has been extended: it is now possible to supply
6091 a list of IP addresses and/or domains to be looked up in a particular DNS
6094 39. Added log_selector=+queue_time_overall.
6096 40. When running the queue in the test harness, wait just a tad after forking a
6097 delivery process, to get repeatability of debugging output.
6099 41. Include certificate and key file names in error message when GnuTLS fails
6100 to set them up, because the GnuTLS error message doesn't include the name
6101 of the failing file when there is a problem reading it.
6103 42. Allow both -bf and -bF in the same test run.
6105 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6107 44. The "Exiscan patch" is now merged into the mainline Exim source.
6109 45. Sometimes the final signoff response after QUIT could fail to get
6110 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6111 < 0 before doing a fflush(). This bug looks as though it goes back to the
6112 introduction of TLS in release 3.20, but "sometimes" must have been rare
6113 because the tests only now provoked it.
6115 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6116 (this can affect the format of dates).
6118 47. exim_tidydb, when checking for the continued existence of a message for
6119 which it has found a message-specific retry record, was not finding
6120 messages that were in split spool directories. Consequently, it was
6121 deleting retry records that should have stayed in existence.
6123 48. Steve fixed some bugs in eximstats.
6125 49. The SPA authentication driver was not abandoning authentication and moving
6126 on to the next authenticator when an expansion was forced to fail,
6127 contradicting the general specification for all authenticators. Instead it
6128 was generating a temporary error. It now behaves as specified.
6130 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6131 (the order specifies the preference for clients). The order is now AES256,
6132 AES128, 3DES, ARCFOUR128.
6134 51. Small patch to Sieve code - explicitly set From: when generating an
6137 52. Exim crashed if a remote delivery caused a very long error message to be
6138 recorded - for instance if somebody sent an entire SpamAssassin report back
6139 as a large number of 550 error lines. This bug was coincidentally fixed by
6140 increasing the size of one of Exim's internal buffers (big_buffer) that
6141 happened as part of the Exiscan merge. However, to be on the safe side, I
6142 have made the code more robust (and fixed the comments that describe what
6145 53. Now that there can be additional text after "Completed" in log lines (if
6146 the queue_time_overall log selector is set), a one-byte patch to exigrep
6147 was needed to allow it to recognize "Completed" as not the last thing in
6150 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6151 patch that reportedly fixes this has been added. I am not expert enough to
6152 create a test for it. This is what the patch creator wrote:
6154 "I found a little strange behaviour of ldap code when working with
6155 Windows 2003 AD Domain, where users was placed in more than one
6156 Organization Units. When I tried to give exim partial DN, the exit code
6157 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6158 But simultaneously result of request was absolutely normal ldap result,
6159 so I produce this patch..."
6161 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6162 REFERENCE, so I have modified the code to exclude the patch when that macro
6165 55. Some experimental protocols are using DNS PTR records for new purposes. The
6166 keys for these records are domain names, not reversed IP addresses. The
6167 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6168 leaves it alone. Component reversal etc. now happens only for IP addresses.
6171 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6173 57. Double the size of the debug message buffer (to 2048) so that more of very
6174 long debug lines gets shown.
6176 58. The exicyclog utility now does better if the number of log files to keep
6177 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6179 59. Two changes related to the smtp_active_hostname option:
6181 (1) $smtp_active_hostname is now available as a variable.
6182 (2) The default for smtp_banner uses $smtp_active_hostname instead
6183 of $primary_hostname.
6185 60. The host_aton() function is supposed to be passed a string that is known
6186 to be a valid IP address. However, in the case of IPv6 addresses, it was
6187 not checking this. This is a hostage to fortune. Exim now panics and dies
6188 if the condition is not met. A case was found where this could be provoked
6189 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6190 components; fortuitously, this particular loophole had already been fixed
6191 by change 4.50/55 above.
6193 If there are any other similar loopholes, the new check in host_aton()
6194 itself should stop them being exploited. The report I received stated that
6195 data on the command line could provoke the exploit when Exim was running as
6196 exim, but did not say which command line option was involved. All I could
6197 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6198 running as the user.
6201 61. There was a buffer overflow vulnerability in the SPA authentication code
6202 (which came originally from the Samba project). I have added a test to the
6203 spa_base64_to_bits() function which I hope fixes it.
6206 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6207 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6209 63. The daemon start-up calls getloadavg() while still root for those OS that
6210 need the first call to be done as root, but it missed one case: when
6211 deliver_queue_load_max is set with deliver_drop_privilege. This is
6212 necessary for the benefit of the queue runner, because there is no re-exec
6213 when deliver_drop_privilege is set.
6215 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6216 This has been fixed.
6218 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6219 was in use, was not putting the data itself into the right store pool;
6220 consequently, it could be overwritten for a subsequent message in the same
6221 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6224 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6226 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6227 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6228 the function were treating the return as a boolean value, which happened to
6229 work because 0=false and not-0=true, but is not correct code.
6231 68. The host_aton() function was not handling scoped IPv6 addresses (those
6232 with, for example, "%eth0" on the end) correctly.
6234 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6235 negated items (that is, ~something) in unsigned ints. Some compilers
6236 apparently mutter when there is no cast.
6238 70. If an address verification called from an ACL failed, and did not produce a
6239 user-specific message (i.e. there was only a "system" message), nothing was
6240 put in $acl_verify_message. In this situation, it now puts the system
6243 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6244 session; change 4.31/43 added the unwanted input to the log line - except
6245 that it did not do this in the start of session case. It now does.
6247 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6248 This is wrong and can cause the other end to generate a synchronization
6249 error if it is another Exim or anything else that does the synchronization
6250 check. A QUIT command is no longer sent after a timeout.
6252 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6253 during host lookups.
6255 74. The defer_ok option of callout verification was not working if it was used
6256 when verifying addresses in header lines, that is, for this case:
6258 verify = header_sender/callout=defer_ok
6260 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6261 those file descriptors could be used for SMTP connections. If anything
6262 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6263 could be sent to the SMTP client, causing chaos. The daemon now opens
6264 stdin, stdout, and stderr to /dev/null when it puts itself into the
6267 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6268 log by default. The user can override this with suitable Perl magic.
6270 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6271 the log message when discard triggers, was not working for the DATA ACL or
6272 for the non-SMTP ACL.
6274 78. Error message wording change in sieve.c.
6276 79. If smtp_accept_max_per_host was set, the number of connections could be
6277 restricted to fewer than expected, because the daemon was trying to set up
6278 a new connection before checking whether the processes handling previous
6279 connections had finished. The check for completed processes is now done
6280 earlier. On busy systems, this bug wouldn't be noticed because something
6281 else would have woken the daemon, and it would have reaped the completed
6284 80. If a message was submitted locally by a user whose login name contained one
6285 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6286 It caused a spool format error. I have fixed the spool reading code. A
6287 related problem was that the "from" clause in the Received: line became
6288 illegal because of the space(s). It is now covered by ${quote_local_part.
6290 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6293 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6295 83. Patch from Sieve maintainer to fix unterminated string problem in
6296 "vacation" handling.
6298 84. Some minor changes to the Linux configuration files to help with other
6299 OS variants using glibc.
6301 85. One more patch for Sieve to update vacation handling to latest spec.
6304 ----------------------------------------------------
6305 See the note above about the 4.44 and 4.50 releases.
6306 ----------------------------------------------------
6312 1. Change 4.43/35 introduced a bug that caused file counts to be
6313 incorrectly computed when quota_filecount was set in an appendfile
6316 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6317 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6320 3. Give more explanation in the error message when the command for a transport
6321 filter fails to execute.
6323 4. There are several places where Exim runs a non-Exim command in a
6324 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6325 was being done only for the command run by the queryprogram router. It is
6326 now done for all such subprocesses. The other cases are: ${run, transport
6327 filters, and the commands run by the lmtp and pipe transports.
6329 5. Some older OS have a limit of 256 on the maximum number of file
6330 descriptors. Exim was using setrlimit() to set 1000 as a large value
6331 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6332 systems. I've change it so that if it can't get 1000, it tries for 256.
6334 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6335 was an oversight, and furthermore, ever since the addition of extra
6336 controls (e.g. 4.43/32), the checks on when to allow different forms of
6337 "control" were broken. There should now be diagnostics for all cases when a
6338 control that does not make sense is encountered.
6340 7. $recipients is now available in the predata ACL (oversight).
6342 8. Tidy the search cache before the fork to do a delivery from a message
6343 received from the command line. Otherwise the child will trigger a lookup
6344 failure and thereby defer the delivery if it tries to use (for example) a
6345 cached ldap connection that the parent has called unbind on.
6347 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6348 of $address_data from the recipient verification was clobbered by the
6349 sender verification.
6351 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6352 was its contents. (It was OK if the option was not defined at all.)
6354 11. A "Completed" log line is now written for messages that are removed from
6355 the spool by the -Mrm option.
6357 12. $host_address is now set to the target address during the checking of
6358 ignore_target_hosts.
6360 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6361 being passed; this would have caused $sender_host_name to have been used if
6362 matching the list had actually called for a host name (not very likely,
6363 since this list is usually IP addresses). A host name is now passed as
6366 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6367 code that specifies a non-restarting handler (typically sigaction() in
6368 modern systems) in an attempt to fix a rare and obscure crash bug.
6370 15. Narrowed the window for a race in the daemon that could cause it to ignore
6371 SIGCHLD signals. This is not a major problem, because they are used only to
6372 wake it up if nothing else does.
6374 16. A malformed maildirsize file could cause Exim to calculate negative values
6375 for the mailbox size or file count. Odd effects could occur as a result.
6376 The maildirsize information is now recalculated if the size or filecount
6379 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6380 support for a long time. Removed HAVE_SYS_VFS_H.
6382 18. Updated exipick to current release from John Jetmore.
6384 19. Allow an empty sender to be matched against a lookup in an address list.
6385 Previously the only cases considered were a regular expression, or an
6388 20. Exim went into a mad DNS lookup loop when doing a callout where the
6389 host was specified on the transport, if the DNS lookup yielded more than
6392 21. The RFC2047 encoding function was originally intended for short strings
6393 such as real names; it was not keeping to the 75-character limit for
6394 encoded words that the RFC imposes. It now respects the limit, and
6395 generates multiple encoded words if necessary. To be on the safe side, I
6396 have increased the buffer size for the ${rfc2047: expansion operator from
6399 22. Failure to deliver a bounce message always caused it to be frozen, even if
6400 there was an errors_to setting on the router. The errors_to setting is now
6403 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6404 canonical form (fully expanded) before being placed in
6405 $sender_host_address.
6407 24. Updated eximstats to version 1.33
6409 25. Include certificate and key file names in error message when GnuTLS fails
6410 to set them up, because the GnuTLS error message doesn't include the name
6411 of the failing file when there is a problem reading it.
6413 26. Expand error message when OpenSSL has problems setting up cert/key files.
6416 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6417 (this can affect the format of dates).
6419 28. exim_tidydb, when checking for the continued existence of a message for
6420 which it has found a message-specific retry record, was not finding
6421 messages that were in split spool directories. Consequently, it was
6422 deleting retry records that should have stayed in existence.
6424 29. eximstats updated to version 1.35
6425 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6426 1.35 - bugfix such that pie charts by volume are generated correctly
6428 30. The SPA authentication driver was not abandoning authentication and moving
6429 on to the next authenticator when an expansion was forced to fail,
6430 contradicting the general specification for all authenticators. Instead it
6431 was generating a temporary error. It now behaves as specified.
6433 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6434 (the order specifies the preference for clients). The order is now AES256,
6435 AES128, 3DES, ARCFOUR128.
6437 31. Small patch to Sieve code - explicitly set From: when generating an
6440 32. Exim crashed if a remote delivery caused a very long error message to be
6441 recorded - for instance if somebody sent an entire SpamAssassin report back
6442 as a large number of 550 error lines. This bug was coincidentally fixed by
6443 increasing the size of one of Exim's internal buffers (big_buffer) that
6444 happened as part of the Exiscan merge. However, to be on the safe side, I
6445 have made the code more robust (and fixed the comments that describe what
6448 33. Some experimental protocols are using DNS PTR records for new purposes. The
6449 keys for these records are domain names, not reversed IP addresses. The
6450 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6451 leaves it alone. Component reversal etc. now happens only for IP addresses.
6454 34. The host_aton() function is supposed to be passed a string that is known
6455 to be a valid IP address. However, in the case of IPv6 addresses, it was
6456 not checking this. This is a hostage to fortune. Exim now panics and dies
6457 if the condition is not met. A case was found where this could be provoked
6458 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6459 components; fortuitously, this particular loophole had already been fixed
6460 by change 4.50/55 or 4.44/33 above.
6462 If there are any other similar loopholes, the new check in host_aton()
6463 itself should stop them being exploited. The report I received stated that
6464 data on the command line could provoke the exploit when Exim was running as
6465 exim, but did not say which command line option was involved. All I could
6466 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6467 running as the user.
6470 35. There was a buffer overflow vulnerability in the SPA authentication code
6471 (which came originally from the Samba project). I have added a test to the
6472 spa_base64_to_bits() function which I hope fixes it.
6475 36. The daemon start-up calls getloadavg() while still root for those OS that
6476 need the first call to be done as root, but it missed one case: when
6477 deliver_queue_load_max is set with deliver_drop_privilege. This is
6478 necessary for the benefit of the queue runner, because there is no re-exec
6479 when deliver_drop_privilege is set.
6481 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6482 was in use, was not putting the data itself into the right store pool;
6483 consequently, it could be overwritten for a subsequent message in the same
6484 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6487 38. Sometimes the final signoff response after QUIT could fail to get
6488 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6489 < 0 before doing a fflush(). This bug looks as though it goes back to the
6490 introduction of TLS in release 3.20, but "sometimes" must have been rare
6491 because the tests only now provoked it.
6497 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6498 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6499 Now it returns an integer. A number of calls were still expecting a T/F
6500 return. Fortuitously, in all cases, the tests worked in OK situations,
6501 which is the norm. However, things would have gone wrong on any write
6502 failures on the smtp file descriptor. This function is used when sending
6503 messages over SMTP and also when doing verify callouts.
6505 2. When Exim is called to do synchronous delivery of a locally submitted
6506 message (the -odf or -odi options), it no longer closes stderr before doing
6509 3. Implemented the mua_wrapper option.
6511 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6513 5. Implemented the functions header_remove(), header_testname(),
6514 header_add_at_position(), and receive_remove_recipient(), and exported them
6517 6. If an ACL "warn" statement specified the addition of headers, Exim already
6518 inserted X-ACL-Warn: at the start if there was no header name. However, it
6519 was not making this test for the second and subsequent header lines if
6520 there were newlines in the string. This meant that an invalid header could
6521 be inserted if Exim was badly configured.
6523 7. Allow an ACL "warn" statement to add header lines at the start or after all
6524 the Received: headers, as well as at the end.
6526 8. Added the rcpt_4xx retry error code.
6528 9. Added postmaster_mailfrom=xxx to callout verification option.
6530 10. Added mailfrom=xxxx to the callout verification option, for verify=
6533 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6534 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6536 12. Inserted some casts to stop certain compilers warning when using pointer
6537 differences as field lengths or precisions in printf-type calls (mostly
6538 affecting debugging statements).
6540 13. Added optional readline() support for -be (dynamically loaded).
6542 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6543 same clock tick as a message's arrival, so that its received time was the
6544 same as the "first fail" time on the retry record, and that message
6545 remained on the queue past the ultimate address timeout, every queue runner
6546 would try a delivery (because it was past the ultimate address timeout) but
6547 after another failure, the ultimate address timeout, which should have then
6548 bounced the address, did not kick in. This was a "< instead of <=" error;
6549 in most cases the first failure would have been in the next clock tick
6550 after the received time, and all would be well.
6552 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6553 being recognized when the domain list was tested by the match_domain
6554 condition in an expansion string.
6556 16. Added the ${str2b64: operator.
6558 17. Exim was always calling setrlimit() to set a large limit for the number of
6559 processes, without checking whether the existing limit was already
6560 adequate. (It did check for the limit on file descriptors.) Furthermore,
6561 errors from getrlimit() and setrlimit() were being ignored. Now they are
6562 logged to the main and panic logs, but Exim does carry on, to try to do its
6563 job under whatever limits there are.
6565 18. Imported PCRE 5.0.
6567 19. Trivial typo in log message " temporarily refused connection" (the leading
6570 20. If the log selector return_path_on_delivery was set and an address was
6571 redirected to /dev/null, the delivery process crashed because it assumed
6572 that a return path would always be set for a "successful" delivery. In this
6573 case, the whole delivery is bypassed as an optimization, and therefore no
6576 21. Internal re-arrangement: the function for sending a challenge and reading
6577 a response while authentication was assuming a zero-terminated challenge
6578 string. It's now changed to take a pointer and a length, to allow for
6579 binary data in such strings.
6581 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6583 23. Exim was not respecting finduser_retries when seeking the login of the
6584 uid under which it was called; it was always trying 10 times. (The default
6585 setting of finduser_retries is zero.) Also, it was sleeping after the final
6586 failure, which is pointless.
6588 24. Implemented tls_on_connect_ports.
6590 25. Implemented acl_smtp_predata.
6592 26. If the domain in control=submission is set empty, Exim assumes that the
6593 authenticated id is a complete email address when it generates From: or
6594 Sender: header lines.
6596 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6597 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6598 chown and chgrp in /bin and hostname in /usr/bin.
6600 28. Exim was keeping the "process log" file open after each use, just as it
6601 does for the main log. This opens the possibility of it remaining open for
6602 long periods when the USR1 signal hits a daemon. Occasional processlog
6603 errors were reported, that could have been caused by this. Anyway, it seems
6604 much more sensible not to leave this file open at all, so that is what now
6607 29. The long-running daemon process does not normally write to the log once it
6608 has entered its main loop, and it closes the log before doing so. This is
6609 so that log files can straightforwardly be renamed and moved. However,
6610 there are a couple of unusual error situations where the daemon does write
6611 log entries, and I had neglected to close the log afterwards.
6613 30. The text of an SMTP error response that was received during a remote
6614 delivery was being truncated at 512 bytes. This is too short for some of
6615 the long messages that one sometimes sees. I've increased the limit to
6618 31. It is now possible to make retry rules that apply only when a message has a
6619 specific sender, in particular, an empty sender.
6621 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6622 it possible to be selective about when SMTP synchronization is enforced.
6624 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6626 32. Implemented hosts_connection_nolog.
6628 33. Added an ACL for QUIT.
6630 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6633 35. Added mailbox_size and mailbox_filecount to appendfile.
6635 36. Added control = no_multiline_responses to ACLs.
6637 37. There was a bug in the logic of the code that waits for the clock to tick
6638 in the case where the clock went backwards by a substantial amount such
6639 that the microsecond fraction of "now" was more than the microsecond
6640 fraction of "then" (but the whole seconds number was less).
6642 38. Added support for the libradius Radius client library this is found on
6643 FreeBSD (previously only the radiusclient library was supported).
6649 1. When certain lookups returned multiple values in the form name=value, the
6650 quoting of the values was not always being done properly. Specifically:
6651 (a) If the value started with a double quote, but contained no whitespace,
6653 (b) If the value contained whitespace other than a space character (i.e.
6654 tabs or newlines or carriage returns) it was not quoted.
6655 This fix has been applied to the mysql and pgsql lookups by writing a
6656 separate quoting function and calling it from the lookup code. The fix
6657 should probably also be applied to nisplus, ibase and oracle lookups, but
6658 since I cannot test any of those, I have not disturbed their existing code.
6660 2. A hit in the callout cache for a specific address caused a log line with no
6661 reason for rejecting RCPT. Now it says "Previous (cached) callout
6662 verification failure".
6664 3. There was an off-by-one bug in the queryprogram router. An over-long
6665 return line was truncated at 256 instead of 255 characters, thereby
6666 overflowing its buffer with the terminating zero. As well as fixing this, I
6667 have increased the buffer size to 1024 (and made a note to document this).
6669 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6670 when Exim is waiting for an SMTP response from a remote server, Exim
6671 restarts its select() call on the socket, thereby resetting its timeout.
6672 This is not a problem when such interrupts are rare. Somebody set up a cron
6673 job to run exiwhat every 2 minutes, which is less than the normal select()
6674 timeout (5 or 10 minutes). This meant that the select() timeout never
6675 kicked in because it was always reset. I have fixed this by comparing the
6676 time when an interrupt arrives with the time at the start of the first call
6677 to select(). If more time than the timeout has elapsed, the interrupt is
6678 treated as a timeout.
6680 5. Some internal re-factoring in preparation for the addition of Sieve
6681 extensions (by MH). In particular, the "personal" test is moved to a
6682 separate function, and given an option for scanning Cc: and Bcc: (which is
6683 not set for Exim filters).
6685 6. When Exim created an email address using the login of the caller as the
6686 local part (e.g. when creating a From: or Sender: header line), it was not
6687 quoting the local part when it contained special characters such as @.
6689 7. Installed new OpenBSD configuration files.
6691 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6692 try to make them clearer.
6694 9. Callout options, other than the timeout value, were being ignored when
6695 verifying sender addresses in header lines. For example, when using
6697 verify = header_sender/callout=no_cache
6699 the cache was (incorrectly) being used.
6701 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6702 only the Cygwin environment.
6704 11. When return_path_on_delivery was set as a log selector, if different remote
6705 addresses in the same message used different return paths and parallel
6706 remote delivery occurred, the wrong values would sometimes be logged.
6707 (Whenever a remote delivery process finished, the return path value from
6708 the most recently started remote delivery process was logged.)
6710 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6711 lines when AUTH and/or TLS are in use. This is the "received protocol"
6712 field. Exim used to use "asmtp" for authenticated SMTP, without any
6713 indication (in the protocol name) for TLS use. Now it follows the RFC and
6714 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6715 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6716 names appear in log lines as well as in Received: header lines.
6718 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6719 extensions, and comparison tests, and to fix some bugs.
6721 14. Changes to the "personal" filter test:
6723 (1) The test was buggy in that it was just doing the equivalent of
6724 "contains" tests on header lines. For example, if a user's address was
6725 anne@some.where, the "personal" test would incorrectly be true for
6727 To: susanne@some.where
6729 This test is now done by extracting each address from the header in turn,
6730 and checking the entire address. Other tests that are part of "personal"
6731 are now done using regular expressions (for example, to check local parts
6732 of addresses in From: header lines).
6734 (2) The list of non-personal local parts in From: addresses has been
6735 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6736 taken from the Sieve specification recommendations.
6738 (3) If the message contains any header line starting with "List-" it is
6739 treated as non-personal.
6741 (4) The test for "circular" in the Subject: header line has been removed
6742 because it now seems ill-conceived.
6744 15. Minor typos in src/EDITME comments corrected.
6746 16. Installed latest exipick from John Jetmore.
6748 17. If headers_add on a router specified a text string that was too long for
6749 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6750 of string_sprintf() is now avoided.
6752 18. $message_body_size was not set (it was always zero) when running the DATA
6753 ACL and the local_scan() function.
6755 19. For the "mail" command in an Exim filter, no default was being set for
6756 the once_repeat time, causing a random time value to be used if "once" was
6757 specified. (If the value happened to be <= 0, no repeat happened.) The
6758 default is now 0s, meaning "never repeat". The "vacation" command was OK
6759 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6760 (I found it when inspecting the code).
6762 20. There is now an overall timeout for performing a callout verification. It
6763 defaults to 4 times the callout timeout, which applies to individual SMTP
6764 commands during the callout. The overall timeout applies when there is more
6765 than one host that can be tried. The timeout is checked before trying the
6766 next host. This prevents very long delays if there are a large number of
6767 hosts and all are timing out (e.g. when the network connections are timing
6768 out). The value of the overall timeout can be changed by specifying an
6769 additional sub-option for "callout", called "maxwait". For example:
6771 verify = sender/callout=5s,maxwait=20s
6773 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6774 to the end before writing, but this should make it even safer).
6776 22. Exim was forgetting that it had advertised PIPELINING for the second and
6777 subsequent messages on an SMTP connection. It was also not resetting its
6778 memory on STARTTLS and an internal HELO.
6780 23. When Exim logs an SMTP synchronization error within a session, it now
6781 records whether PIPELINING has been advertised or not.
6783 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6784 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6785 rather than long int.
6787 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6789 26. Added the never_mail option to autoreply.
6795 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6796 crash if the getsockname() call failed; this can happen if a connection is
6797 closed very soon after it is established. The problem was simply in the
6798 order in which certain operations were done, causing Exim to try to write
6799 to the SMTP stream before it had set up the file descriptor. The bug has
6800 been fixed by making things happen in the correct order.
6806 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6807 before the connection was closed, thus losing the rejection response.
6809 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6810 some early Solaris releases, but causes trouble in current releases where
6811 socklen_t is defined.
6813 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6816 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6819 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6820 that releasing the top of it at the end releases what was used for sub-
6821 expansions (unless the block got too big). However, discard this block if
6822 the first thing is a variable or header, so that we can use its block when
6823 it is dynamic (useful for very large $message_headers, for example).
6825 6. Lookups now cache *every* query, not just the most recent. A new, separate
6826 store pool is used for this. It can be recovered when all lookup caches are
6827 flushed. Lookups now release memory at the end of their result strings.
6828 This has involved some general refactoring of the lookup sources.
6830 7. Some code has been added to the store_xxx() functions to reduce the amount
6831 of flapping under certain conditions.
6833 8. log_incoming_interface used to affect only the <= reception log lines. Now
6834 it causes the local interface and port to be added to several more SMTP log
6835 lines, for example "SMTP connection from", and rejection lines.
6837 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6839 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6841 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6842 could be overwritten at the end of the current message (or the start of a
6843 new message if it was set in a HELO ACL). The value is now preserved for
6844 the duration of the SMTP connection.
6846 12. If a transport had a headers_rewrite setting, and a matching header line
6847 contained an unqualified address, that address was qualified, even if it
6848 did not match any rewriting rules. The underlying bug was that the values
6849 of the flags that permit the existence of unqualified sender and recipient
6850 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6851 non-local messages, and by -bnq for local messages) were not being
6852 preserved with the message after it was received.
6854 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6855 "next input=" as part of the text comprising the host identity instead of
6856 the correct text. The code was using the same buffer for two different
6857 strings. However, depending on which order the printing function evaluated
6858 its arguments, the bug did not always show up. Under Linux, for example, my
6859 test suite worked just fine.
6861 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6862 doesn't work with some older versions of Perl. It has been changed to "my",
6863 which in any case is probably the better facility to use.
6865 15. A really picky compiler found some instances of statements for creating
6866 error messages that either had too many or two few arguments for the format
6869 16. The size of the buffer for calls to the DNS resolver has been increased
6870 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6871 for addresses that have a lot of PTR records. This alleviates a problem; it
6872 does not fully solve it.
6874 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6875 buffer now truncates the list and logs the incident, which is the same
6876 action as happens when Exim is looking up a host name and its aliases.
6877 Previously in this situation something unpredictable would happen;
6878 sometimes it was "internal error: store_reset failed".
6880 18. If a server dropped the connection unexpectedly when an Exim client was
6881 using GnuTLS and trying to read a response, the client delivery process
6882 crashed while trying to generate an error log message.
6884 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6885 string, for example:
6887 warn message = H1: something\nH2: something
6889 the text was added as a single header line from Exim's point of view
6890 though it ended up OK in the delivered message. However, searching for the
6891 second and subsequent header lines using $h_h2: did not work. This has been
6892 fixed. Similarly, if a system filter added multiple headers in this way,
6893 the routers could not see them.
6895 20. Expanded the error message when iplsearch is called with an invalid key to
6896 suggest using net-iplsearch in a host list.
6898 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6899 ACLs are no longer actually imposed (and a message to that effect is
6902 22. If a "gecos" field in a passwd entry contained escaped characters, in
6903 particular, if it contained a \" sequence, Exim got it wrong when building
6904 a From: or a Sender: header from that name. A second bug also caused
6905 incorrect handling when an unquoted " was present following a character
6906 that needed quoting.
6908 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6909 was not being matched caselessly.
6911 24. Arranged for all hyphens in the exim.8 source to be escaped with
6914 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6915 properly. Recipient callout cache records were still being keyed to include
6916 the sender, even when use_sender was set false. This led to far more
6917 callouts that were necessary. The sender is no longer included in the key
6918 when use_sender is false.
6920 26. Added "control = submission" modifier to ACLs.
6922 27. Added the ${base62d: operator to decode base 62 numbers.
6924 28. dnsdb lookups can now access SRV records.
6926 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6927 the configuration file.
6929 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6930 (-v) mode. This makes the output for a verbose queue run more intelligible.
6932 31. Added a use_postmaster feature to recipient callouts.
6934 32. Added the $body_zerocount variable, containing the number of binary zero
6935 bytes in the message body.
6937 33. The time of last modification of the "new" subdirectory is now used as the
6938 "mailbox time last read" when there is a quota error for a maildir
6941 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6943 35. Added +ignore_unknown as a special item in host lists.
6945 36. Code for decoding IPv6 addresses in host lists is now included, even if
6946 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6947 address was recognized as an IP address, but was then not correctly decoded
6948 into binary, causing unexpected and incorrect effects when compared with
6955 1. Very minor rewording of debugging text in manualroute to say "list of
6956 hosts" instead of "hostlist".
6958 2. If verify=header_syntax was set, and a header line with an unqualified
6959 address (no domain) and a large number of spaces between the end of the
6960 name and the colon was received, the reception process suffered a buffer
6961 overflow, and (when I tested it) crashed. This was caused by some obsolete
6962 code that should have been removed. The fix is to remove it!
6964 3. When running in the test harness, delay a bit after writing a bounce
6965 message to get a bit more predictability in the log output.
6967 4. Added a call to search_tidyup() just before forking a reception process. In
6968 theory, someone could use a lookup in the expansion of smtp_accept_max_
6969 per_host which, without the tidyup, could leave open a database connection.
6971 5. Added the variables $recipient_data and $sender_data which get set from a
6972 lookup success in an ACL "recipients" or "senders" condition, or a router
6973 "senders" option, similar to $domain_data and $local_part_data.
6975 6. Moved the writing of debug_print from before to after the "senders" test
6978 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6979 problems for message scanning, either using a data ACL, or using
6980 local_scan() because the Received: header was not generated till after they
6981 were called (in order to set the time as the time of reception completion).
6982 I have revised the way this works. The header is now generated after the
6983 body is received, but before the ACL or local_scan() are called. After they
6984 are run, the timestamp in the header is updated.
6990 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6991 before starting a queue runner without re-exec. This happened only when
6992 deliver_drop_privilege was set or when the Exim user was set to root. The
6993 effect of the bug was that timeouts during subsequent deliveries caused
6994 crashes instead of being properly handled. The handler is now left at its
6995 default (and expected) setting.
6997 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6998 message, again when deliver_drop_privilege is set or Exim is run as root.
6999 The bug described in (1) was not present in this case, but the tidying up
7000 of the other signals was missing. I have made the two cases consistent.
7002 3. The ignore_target_hosts setting on a manualroute router was being ignored
7003 for hosts that were looked up using the /MX notation.
7005 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7008 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7009 operated on the sender address. After changing the $sender_address to <>
7010 for the sender address verify, Exim was re-instated it as the original
7011 (before rewriting) address, but remembering that it had rewritten it, so it
7012 wasn't rewriting it again. This bug also had the effect of breaking the
7013 sender address verification caching when the sender address was rewritten.
7015 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7016 This has been changed so that if the ip literal address matches
7017 ignore_target_hosts, the router declines.
7019 7. Added expansion conditions match_domain, match_address, and match_local_
7020 part (NOT match_host).
7022 8. The placeholder for the Received: header didn't have a length field set.
7024 9. Added code to Exim itself and to exim_lock to test for a specific race
7025 condition that could lead to file corruption when using MBX delivery. The
7026 issue is with the lockfile that is created in /tmp. If this file is removed
7027 after a process has opened it but before that process has acquired a lock,
7028 there is the potential for a second process to recreate the file and also
7029 acquire a lock. This could lead to two Exim processes writing to the file
7030 at the same time. The added code performs the same test as UW imapd; it
7031 checks after acquiring the lock that its file descriptor still refers to
7032 the same named file.
7034 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7035 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7038 11. Added the smtp_active_hostname option. If used, this will typically be made
7039 to depend on the incoming interface address. Because $interface_address is
7040 not set up until the daemon has forked a reception process, error responses
7041 that can happen earlier (such as "too many connections") no longer contain
7044 12. If an expansion in a condition on a "warn" statement fails because a lookup
7045 defers, the "warn" statement is abandoned, and the next ACL statement is
7046 processed. Previously this caused the whole ACL to be aborted.
7048 13. Added the iplsearch lookup type.
7050 14. Added ident_timeout as a log selector.
7052 15. Added tls_certificate_verified as a log selector.
7054 16. Added a global option tls_require_ciphers (compare the smtp transport
7055 option of the same name). This controls incoming TLS connections.
7057 17. I finally figured out how to make tls_require_ciphers do a similar thing
7058 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7059 before starting the TLS session.
7061 18. Tabs are now shown as \t in -bP output.
7063 19. If the log selector return_path_on_delivery was set, Exim crashed when
7064 bouncing a message because it had too many Received: header lines.
7066 20. If two routers both had headers_remove settings, and the first one included
7067 a superfluous trailing colon, the final name in the first list and the
7068 first name in the second list were incorrectly joined into one item (with a
7069 colon in the middle).
7075 1. Added -C and -D options to the exinext utility, mainly to make it easier
7076 to include in the automated testing, but these could be helpful when
7077 multiple configurations are in use.
7079 2. The exinext utility was not formatting the output nicely when there was
7080 an alternate port involved in the retry record key, nor when there was a
7081 message id as well (for retries that were specific to a specific message
7082 and a specific host). It was also confused by IPv6 addresses, because of
7083 the additional colons they contain. I have fixed the IPv4 problem, and
7084 patched it up to do a reasonable job for IPv6.
7086 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7087 delivery, the log line now contains "pipelined" if PIPELINING was used.
7089 4. An SMTP transport process used to panic and die if the bind() call to set
7090 an explicit outgoing interface failed. This has been changed; it is now
7091 treated in the same way as a connect() failure.
7093 5. A reference to $sender_host_name in the part of a conditional expansion
7094 that was being skipped was still causing a DNS lookup. This no longer
7097 6. The def: expansion condition was not recognizing references to header lines
7098 that used bh_ and bheader_.
7100 7. Added the _cache feature to named lists.
7102 8. The code for checking quota_filecount in the appendfile transport was
7103 allowing one more file than it should have been.
7105 9. For compatibility with Sendmail, the command line option
7113 and sets the incoming protocol and host name (for trusted callers). The
7114 host name and its colon can be omitted when only the protocol is to be set.
7115 Note the Exim already has two private options, -pd and -ps, that refer to
7116 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7117 "s", but I don't think that's a major issue.
7119 10. A number of refactoring changes to the code, none of which should affect
7122 (a) The number of logging options was getting close to filling up the
7123 32-bit word that was used as a bit map. I have split them into two classes:
7124 those that are passed in the argument to log_write(), and those that are
7125 only ever tested independently outside of that function. These are now in
7126 separate 32-bit words, so there is plenty of room for expansion again.
7127 There is no change in the user interface or the logging behaviour.
7129 (b) When building, for example, log lines, the code previously used a
7130 macro that called string_cat() twice, in order to add two strings. This is
7131 not really sufficiently general. Furthermore, there was one instance where
7132 it was actually wrong because one of the argument was used twice, and in
7133 one call a function was used. (As it happened, calling the function twice
7134 did not affect the overall behaviour.) The macro has been replaced by a
7135 function that can join an arbitrary number of extra strings onto a growing
7138 (c) The code for expansion conditions now uses a table and a binary chop
7139 instead of a serial search (which was left over from when there were very
7140 few conditions). Also, it now recognizes conditions like "pam" even when
7141 the relevant support is not compiled in: a suitably worded error message is
7142 given if an attempt is made to use such a condition.
7144 11. Added ${time_interval:xxxxx}.
7146 12. A bug was causing one of the ddress fields not to be passed back correctly
7147 from remote delivery subprocesses. The field in question was not being
7148 subsequently used, so this caused to problems in practice.
7150 13. Added new log selectors queue_time and deliver_time.
7152 14. Might have fixed a bug in maildirsizefile handling that threw up
7153 "unexpected character" debug warnings, and recalculated the data
7154 unnecessarily. In any case, I expanded the warning message to give more
7157 15. Added the message "Restricted characters in address" to the statements in
7158 the default ACL that block characters like @ and % in local parts.
7160 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7161 Three changes have been made:
7163 (a) There was a serious bug; a negative response to MAIL caused the whole
7164 recipient domain to be cached as invalid, thereby blocking all messages
7165 to all local parts at the same domain, from all senders. This bug has
7166 been fixed. The domain is no longer cached after a negative response to
7167 MAIL if the sender used is not empty.
7169 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7172 (c) A new callout option, "use_sender" has been added for people who want
7173 the modified behaviour.
7179 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7182 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7183 indeed breaks things for older releases.
7185 3. Added additional logging to the case where there is a problem reading data
7186 from a filter that is running in a subprocess using a pipe, in order to
7187 try to track down a specific problem.
7189 4. Testing facility fudge: when running in the test harness and attempting
7190 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7191 getting "No route to host". Convert this to a timeout.
7193 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7196 6. Some OS don't have socklen_t but use size_t instead. This affects the
7197 fifth argument of getsockopt() amongst other things. This is now
7198 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7199 can be set for individual OS. I have set it for SunOS5, OSF1, and
7200 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7201 some earlier ones do not.
7203 7. Change 4.30/15 was not doing the test caselessly.
7205 8. The standard form for an IPv6 address literal was being rejected by address
7206 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7207 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7208 this, as well as the form without the "IPv6" on the front (but only when
7209 address literals are enabled, of course).
7211 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7213 10. Exim crashed if a message with an empty sender address specified by -f
7214 encountered a router with an errors_to setting. This could be provoked only
7215 by a command such as
7219 where an empty string was supplied; "<>" did not hit this bug.
7221 11. Installed PCRE release 4.5.
7223 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7224 remained set. It is now erased.
7226 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7227 times from message ids (which are base 36 rather than the normal 62).
7229 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7230 were being counted as actual protocol errors, and logged if the log
7231 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7232 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7233 and DATA following a set of rejected RCPTs do not count as protocol errors.
7234 In other words, Exim assumes they were pipelined, though this may not
7235 actually be the case. Of course, in all cases the client gets an
7236 appropriate error code.
7238 15. If a lookup fails in an ACL condition, a message about the failure may
7239 be available; it is used if testing the ACL cannot continue, because most
7240 such messages specify what the cause of the deferral is. However, some
7241 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7242 that caused an old message to be retained and used if a later statement
7243 caused a defer, replacing the real cause of the deferral.
7245 16. If an IP address had so many PTR records that the DNS lookup buffer
7246 was not large enough to hold them, Exim could crash while trying to process
7247 the truncated data. It now detects and logs this case.
7249 17. Further to 4.21/58, another change has been made: if (and only if) the
7250 first line of a message (the first header line) ends with CRLF, a bare LF
7251 in a subsequent header line has a space inserted after it, so as not to
7252 terminate the header.
7254 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7255 unnecessarily, used atoi() instead of strtol(), and didn't check the
7256 termination when getting file sizes from file names by regex.
7258 19. Completely re-implemented the support for maildirsize files, in the light
7259 of a number of problems with the previous contributed implementation
7260 (4.30/29). In particular:
7262 . If the quota is zero, the maildirsize file is maintained, but no quota is
7265 . If the maildir directory does not exist, it is created before any attempt
7266 to write a maildirsize file.
7268 . The quota value in the file is just a cache; if the quota is changed in
7269 the transport, the new value overrides.
7271 . A regular expression is available for excluding directories from the
7274 20. The autoreply transport checks the characters in options that define the
7275 message's headers; it allows continued headers, but it was checking with
7276 isspace() after an embedded newline instead of explicitly looking for a
7279 21. If all the "regular" hosts to which an address was routed had passed their
7280 expiry times, and had not reached their retry times, the address was
7281 bounced, even if fallback hosts were defined. Now Exim should go on to try
7284 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7285 equivalent code in the SMTP transport. Some hosts send humungous responses
7286 to HELO/EHLO, more than 1024 it seems.
7288 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7289 gives compiler warnings in some environments. I've now done it "properly",
7292 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7293 (because of problems with the built-in one) was declared to return uschar *
7294 instead of char *, causing compiler failure.
7296 25. Fixed a file descriptor leak when processing alias/forward files.
7298 26. Fixed a minor format string issue in dbfn.c.
7300 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7302 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7303 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7306 29. When a sender address is verified, it is cached, to save repeating the test
7307 when there is more than one recipient in a message. However, when the
7308 verification involves a callout, it is possible for different callout
7309 options to be set for different recipients. It is too complicated to keep
7310 track of this in the cache, so now Exim always runs a verification when a
7311 callout is required, relying on the callout cache for the optimization.
7312 The overhead is duplication of the address routing, but this should not be
7315 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7316 to be verified with callout=postmaster, and the main callout worked but the
7317 postmaster check failed, the verification correctly failed. However, if a
7318 subsequent RCPT command asked for sender verification *without* the
7319 postmaster check, incorrect caching caused this verification also to fail,
7322 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7323 it was not caching the DNS options (qualify_single, search_parents) that
7324 were used when the lookup failed. A subsequent lookup with different
7325 options therefore always gave the same answer, though there were cases
7326 where it should not have. (Example: a "domains = !$mx_any" option on a
7327 dnslookup router: the "domains" option is always processed without any
7328 widening, but the router might have qualify_single set.) Now Exim uses the
7329 cached value only when the same options are set.
7331 32. Added John Jetmore's "exipick" utility to the distribution.
7333 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7334 than a timeout (e.g. a certificate is required, and is not provided), an
7335 Exim server now closes the connection immediately. Previously it waited for
7336 the client to close - but if the client is SSL, it seems that they each
7337 wait for each other, leading to a delay before one of them times out.
7339 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7340 maintained 0.8.x compatibility because I don't think many are using it, and
7341 it is clearly obsolete.
7343 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7346 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7347 client certificate was expired. A simple patch fixes this, though I don't
7348 understand the full logic of why the verify callback is called multiple
7351 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7352 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7353 which causes problems with some clients (such as the Certicom SSL Plus
7354 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7355 disables the coutermeasure allowing Eudora to connect."
7357 38. Exim was not checking that a write() to a log file succeeded. This could
7358 lead to Bad Things if a log got too big, in particular if it hit a file
7359 size limit. Exim now panics and dies if it cannot write to a log file, just
7360 as it does if it cannot open a log file.
7362 39. Modified OS/Makefile-Linux so that it now contains
7364 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7366 The two -D definitions ensure that Exim is compiled with large file
7367 support, which makes it possible to handle log files that are bigger than
7370 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7371 instance) a domain was checked against a named list that involved a lookup,
7372 causing $domain_data to be set, then another domain was checked against the
7373 same list, then the first domain was re-checked, the value of $domain_data
7374 after the final check could be wrong. In particular, if the second check
7375 failed, it could be set empty. This bug probably also applied to
7378 41. The strip_trailing_dot option was not being applied to the address given
7379 with the -f command-line option.
7381 42. The code for reading a message's header from the spool was incrementing
7382 $received_count, but never initializing it. This meant that the value was
7383 incorrect (doubled) while delivering a message in the same process in which
7384 it was received. In the most common configuration of Exim, this never
7385 happens - a fresh exec is done - but it can happen when
7386 deliver_drop_privilege is set.
7388 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7389 it now includes up to 150 characters of the unexpected data in the log
7392 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7393 and building data strings. The size of both of these buffers was 10 000
7394 bytes - far larger than anybody would *ever* want, thought I. Needless to
7395 say, somebody hit the limit. I have increased the maximum line length to
7396 20 000 and the maximum data length of concatenated lines to 100 000. I have
7397 also fixed two bugs, because there was no checking on these buffers. Tsk,
7398 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7399 buffer is too small.
7401 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7402 lsearch lookups. Now it does.
7404 46. When parsing a route_list item in a manualroute router, a fixed-length
7405 buffer was used for the list of hosts. I made this 1024 bytes long,
7406 thinking that nobody would ever have a list of hosts that long. Wrong.
7407 Somebody had a whole pile of complicated expansion conditions, and the
7408 string was silently truncated, leading to an expansion error. It turns out
7409 that it is easier to change to an unlimited length (owing to other changes
7410 that have happened since this code was originally written) than to build
7411 structure for giving a limitation error. The length of the item that
7412 expands into the list of hosts is now unlimited.
7414 47. The lsearch lookup could not handle data where the length of text line was
7415 more than 4095 characters. Such lines were truncated, leading to shortened
7416 data being returned. It should now handle lines of any length.
7418 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7419 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7422 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7423 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7424 no longer happens in comment lines. A list of replacements is now placed
7425 at the head of all of the source files, except those whose only change is
7426 to replace PERL_COMMAND in the very first #! line.
7428 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7429 messages on the queue, with a bottom-up merge sort, using code contributed
7430 by Michael Haardt. This should make operations like -bp somewhat faster on
7431 large queues. It won't affect queue runners, except when queue_run_in_order
7434 51. Installed eximstats 1.31 in the distribution.
7436 52. Added support for SRV lookups to the dnslookup router.
7438 53. If an ACL referred to $message_body or $message_body_end, the value was not
7439 reset for any messages that followed in the same SMTP session.
7441 54. The store-handling optimization for building very long strings was not
7442 differentiating between the different store pools. I don't think this
7443 actually made any difference in practice, but I've tidied it.
7445 55. While running the routers to verify a sender address, $sender_address
7446 was still set to the sender address. This is wrong, because when routing to
7447 send a bounce to the sender, it would be empty. Therefore, I have changed
7448 it so that, while verifying a sender address, $sender_address is set to <>.
7449 (There is no change to what happens when verifying a recipient address.)
7451 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7452 target A or AAAA records (if not already returned) without resetting the
7453 qualify_single or search_parents options of the DNS resolver. These are
7454 inappropriate in this case because the targets of MX and SRV records must
7455 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7456 target that, when qualified, matched something in the local domain. These
7457 two options are now turned off when doing these lookups.
7459 57. It seems that at least some releases of Reiserfs (which does not have the
7460 concept of a fixed number of inodes) returns zero and not -1 for the
7461 number of available inodes. This interacted badly with check_spool_inodes,
7462 which assumed that -1 was the "no such thing" setting. What I have done is
7463 to check that the total number of inodes is greater than zero before doing
7464 the test of how many are available.
7466 58. When a "warn" ACL statement has a log_message modifier, the message is
7467 remembered, and not repeated. This is to avoid a lot of repetition when a
7468 message has many recipients that cause the same warning to be written.
7469 However, Exim was preserving the list of already written lines for an
7470 entire SMTP session, which doesn't seem right. The memory is now reset if a
7471 new message is started.
7473 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7474 debugging output unless log_rewrite was also set.
7476 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7477 of (int)(handle) when we know that handle contains (void *)(-1).
7479 61. The Exim daemon panic-logs an error return when it closes the incoming
7480 connection. However "connection reset by peer" seems to be common, and
7481 isn't really an error worthy of noting specially, so that particular error
7484 62. When Exim is trying to find all the local interfaces, it used to panic and
7485 die if the ioctl to get the interface flags failed. However, it seems that
7486 on at least one OS (Solaris 9) it is possible to have an interface that is
7487 included in the list of interfaces, but for which you get a failure error
7488 for this call. This happens when the interface is not "plumbed" into a
7489 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7490 failure of the "get flags" call assumes that the interface is down.
7492 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7493 makes life easier for people who are doing arithmetic on fields extracted
7494 from dates, where you often get leading zeros that should not be
7495 interpreted as octal.
7497 64. Added qualify_domain to the redirect router, to override the global
7500 65. If a pathologically long header line contained very many addresses (the
7501 report of this problem mentioned 10 000) and each of them was rewritten,
7502 Exim could use up a very large amount of memory. (It kept on making new
7503 copies of the header line as it rewrote, and never released the old ones.)
7504 At the expense of a bit more processing, the header rewriting function has
7505 been changed so that it no longer eats memory in this way.
7507 66. The generation of the Received: header has been moved from the time that a
7508 message starts to be received, to the time that it finishes. The timestamp
7509 in the Received: header should now be very close to that of the <= log
7510 line. There are two side-effects of this change:
7512 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7513 logged header lines no longer include the local Received: line, because
7514 it has not yet been created. The same applies to a copy of the message
7515 that is returned to a non-SMTP sender when a message is rejected.
7517 (b) When a filter file is tested using -bf, no additional Received: header
7518 is added to the test message. After some thought, I decided that this
7521 This change does not affect the value of $received_for. It is still set
7522 after address rewriting, but before local_scan() is called.
7524 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7526 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7527 gave an unhelpful panic error message, and a defer error. I have managed to
7528 change this behaviour so that it now rejects any supplied certificate,
7529 which seems right, as the list of acceptable certificates is empty.
7531 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7532 gave an unhelpful defer error. I have not managed to make this reject any
7533 supplied certificates, but the error message it gives is "no certificate
7534 supplied", which is not helpful.
7536 70. exigrep's output now also includes lines that are not associated with any
7537 message, but which match the given pattern. Implemented by a patch from
7538 Martin Sluka, which also tidied up the Perl a bit.
7540 71. Recipient callout verification, like sender verification, was using <> in
7541 the MAIL FROM command. This isn't really the right thing, since the actual
7542 sender may affect whether the remote host accepts the recipient or not. I
7543 have changed it to use the actual sender in the callout; this means that
7544 the cache record is now keyed on a recipient/sender pair, not just the
7545 recipient address. There doesn't seem to be a real danger of callout loops,
7546 since a callout by the remote host to check the sender would use <>.
7547 [SEE ABOVE: changed after hitting problems.]
7549 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7550 temporary errors. However, in the case of such a code being given after
7551 the end of a data transmission (i.e. after ".") Exim was failing to write
7552 a retry record for the message. (Yes, there was some broken host that was
7553 actually sending 8xx at this point.)
7555 73. An unknown lookup type in a host list could cause Exim to panic-die when
7556 the list was checked. (An example that provoked this was putting <; in the
7557 middle of a list instead of at the start.) If this happened during a DATA
7558 ACL check, a -D file could be left lying around. This kind of configuration
7559 error no longer causes Exim to die; instead it causes a defer error. The
7560 incident is still logged to the main and panic logs.
7562 74. Buglet left over from Exim 3 conversion. The message "too many messages
7563 in one connection" was written to the rejectlog but not the mainlog, except
7564 when address rewriting (yes!) was being logged.
7566 75. Added write_rejectlog option.
7568 76. When a system filter was run not as root (that is, when system_filter_user
7569 was set), the values of the $n variables were not being returned to the
7570 main process; thus, they were not subsequently available in the $sn
7573 77. Added +return_path_on_delivery log selector.
7575 78. A connection timeout was being treated differently from recipients deferred
7576 when testing hosts_max_try with a message that was older than the host's
7577 retry timeout. (The host should not be counted, thus allowing all hosts to
7578 be tried at least once before bouncing.) This may have been the cause of an
7579 occasionally reported bug whereby a message would remain on the queue
7580 longer than the retry timeout, but would be bounced if a delivery was
7581 forced. I say "may" because I never totally pinned down the problem;
7582 setting up timeout/retry tests is difficult. See also the next item.
7584 79. The ultimate address timeout was not being applied to errors that involved
7585 a combination of host plus message (for example, a timeout on a MAIL
7586 command). When an address resolved to a number of possible hosts, and they
7587 were not all tried for each delivery (e.g. because of hosts_max_try), a
7588 message could remain on the queue longer than the retry timeout.
7590 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7593 81. Fixed an obscure SMTP outgoing bug which required at least the following
7594 conditions: (a) there was another message waiting for the same server;
7595 (b) the server returned 5xx to all RCPT commands in the first message so
7596 that the message was not completed; (c) the server dropped the connection
7597 or gave a negative response to the RSET that Exim sends to abort the
7598 transaction. The observed case was a dropped connection after DATA that had
7599 been sent in pipelining mode. That is, the server had advertised PIPELINING
7600 but was not implementing it correctly. The effect of the bug was incorrect
7601 behaviour, such as trying another host, and this could lead to a crash.
7607 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7608 and daemon.c were passed as pointers to ints; they should have been
7609 pointers to socklen_t variables (which are typically unsigned ints).
7611 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7614 3. Fixed a really odd bug that affected only the testing scheme; patching a
7615 certain fixed string in the binary changed the value of another string that
7616 happened to be identical to the end of the original first string.
7618 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7619 name", it returns that address as the IP address. On some operating
7620 systems (e.g. Solaris), it also passes back the IP address string as the
7621 "host name". However, on others (e.g. Linux), it passes back an empty
7622 string. Exim wasn't checking for this, and was changing the host name to an
7623 empty string, assuming it had been canonicalized.
7625 5. Although rare, it is permitted to have more than one PTR record for a given
7626 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7627 all the names associated with an address, because they do in Solaris.
7628 However, it seems that they do not in Linux for data that comes from the
7629 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7630 I found this out when I moved to a new Linux workstation and tried to run
7631 the Exim test suite.
7633 To get round this problem I have changed the code so that it now does its
7634 own call to the DNS to look up PTR records when searching for a host name.
7635 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7636 addresses that are only in /etc/hosts are still found.
7638 This behaviour is, however, controlled by an option called host_lookup_
7639 order, which defaults to "bydns:byaddr". If people want to use the other
7640 order, or indeed, just use one or the other means of lookup, they can
7641 specify it in this variable.
7643 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7644 some operating systems, this comes back from gethostbyaddr() as an empty
7645 string, and this is what Exim used to test for. However, it seems that in
7646 other systems, "." is yielded. Exim now tests for this case too.
7648 7. The values of check_spool_space and check_log_space are now held internally
7649 as a number of kilobytes instead of an absolute number of bytes. If a
7650 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7651 kilobyte. This means that much larger values can be stored.
7653 8. Exim monitor: an attempt to get the action menu when not actually pointing
7654 at a message produces an empty menu entitled "No message selected". This
7655 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7656 no entries in it ("Shell widget menu has zero width and/or height"). So I
7657 have added a single, blank menu entry in this case.
7659 9. Added ${quote_local_part.
7661 10. MIME decoding is now applied to the contents of Subject: header lines when
7664 11. Now that a reference to $sender_host_address automatically causes a reverse
7665 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7666 host lookup before query-style lookups in lists that might use this
7667 variable. This has therefore been abolished, and the "net-" prefix is no
7668 longer necessary for query-style lookups.
7670 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7671 have been a typo for LFLAGS, so it has been changed.
7673 13. The install script calls Exim with "-C /dev/null" in order to find the
7674 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7675 to be output. However, since Exim outputs its version number before the
7676 error, it didn't break the script. It just looked ugly. I fixed this by
7677 always allowing "-C /dev/null" if the caller is root.
7679 14. Ignore overlarge ACL variable number when reading spool file - insurance
7680 against a later release with more variables having written the file.
7682 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7683 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7684 this, as well as the form without the "IPv6" on the front.
7686 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7687 OS/Makefile-Darwin file.
7689 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7690 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7692 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7693 variable. However, some OS use ints for inodes. I've added cast to long int
7694 to get rid of the compiler warning.
7696 19. I had forgotten to lock out "/../" in configuration file names when
7697 ALT_CONFIG_PREFIX was set.
7699 20. Routers used for verification do not need to specify transports. However,
7700 if such a router generated a host list, and callout was configured, Exim
7701 crashed, because it could not find a port number from the (non-existent)
7702 transport. It now assumes port 25 in this circumstance.
7704 21. Added the -t option to exigrep.
7706 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7707 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7708 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7709 them is set, LOOKUP_LSEARCH is forced.
7711 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7713 24. Added sender and host information to the "rejected by local_scan()" log
7714 line; previously there was no indication of these.
7716 25. Added .include_if_exists.
7718 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7719 Linux. It turns out that not all file systems support this. Apparently some
7720 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7721 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7722 not supported on the file descriptor, is now ignored when Exim is trying to
7723 sync a directory. This applies only to Linux.
7725 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7727 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7728 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7731 29. Added support for maildirsize files from supplied patch (modified a bit).
7733 30. The use of :fail: followed by an empty string could lead Exim to respond to
7734 sender verification failures with (e.g.):
7736 550 Verification failed for <xxx>
7737 550 Sender verify failed
7739 where the first response line was missing the '-' that indicates it is not
7740 the final line of the response.
7742 31. The loop for finding the name of the user that called Exim had a hardwired
7743 limit of 10; it now uses the value of finduser_retries, which is used for
7744 all other user lookups.
7746 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7749 33. Exim was neglecting to zero errno before one call of strtol() when
7750 expanding a string and expecting an integer value. On some systems this
7751 resulted in spurious "integer overflow" errors. Also, it was casting the
7752 result into an int without checking.
7754 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7755 did not work. The code looks as if it has *never* worked, though it appears
7756 to have been documented since at least release 1.62. I have made it work.
7758 35. The "timeout_DNS" error in retry rules, also documented since at least
7759 1.62, also never worked. As it isn't clear exactly what this means, and
7760 clearly it isn't a major issue, I have abolished the feature by treating it
7761 as "timeout", and writing a warning to the main and panic logs.
7763 36. The display of retry rules for -brt wasn't always showing the error code
7766 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7767 timeout_connect_A, timeout_connect_MX.
7769 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7770 to the empty sender.
7772 39. The daemon was not analysing the content of -oX till after it had closed
7773 stderr and disconnected from the controlling terminal. This meant that any
7774 syntax errors were only noted on the panic log, and the return code from
7775 the command was 0. By re-arranging the code a little, I've made the
7776 decoding happen first, so such errors now appear on stderr, and the return
7777 code is 1. However, the actual setting up of the sockets still happens in
7778 the disconnected process, so errors there are still only recorded on the
7781 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7782 connections (as happens on some IP stacks) was logged at start up time as
7783 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7784 it from "IPv6 and IPv4", which means that two separate sockets are being
7787 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7788 says whether AF_INET or AF_INET6 was passed as an argument.
7790 42. Exiwhat output was messed up when time zones were included in log
7793 43. Exiwhat now gives more information about the daemon's listening ports,
7794 and whether -tls-on-connect was used.
7796 44. The "port" option of the smtp transport is now expanded.
7798 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7799 silently ignored. Now an error message is written to the main and panic
7802 46. There's a new ACL modifier called "logwrite" which writes to a log file
7803 as soon as it is encountered.
7805 47. Added $local_user_uid and $local_user_gid at routing time.
7807 48. Exim crashed when trying to verify a sender address that was being
7810 49. Exim was recognizing only a space character after ".include". It now also
7811 recognizes a tab character.
7813 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7814 extracting the relevant information from the specification. The man page no
7815 longer contains scrambled data for the -d option, and I've added a section
7816 at the front about calling Exim under different names.
7818 51. Added "extra_headers" argument to the "mail" command in filter files.
7820 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7823 53. Installed eximstats 1.29.
7825 54. Added transport_filter_timeout as a generic transport option.
7827 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7828 Cc: header lines. This was required by RFC 822, but it not required by RFC
7831 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7832 incoming messages that did not have them. Now it does so only if the
7833 message originates locally, that is, if there is no associated remote host
7834 address. When Resent- header lines are present, this applies to the Resent-
7835 lines rather than the non-Resent- lines.
7837 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7838 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7840 58. Messages for configuration errors now include the name of the main
7841 configuration file - useful now that there may be more than one file in a
7842 list (.included file names were always shown).
7844 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7845 for those rare installations that do not start the daemon as root or run it
7846 setuid root. I've cut out the call to initgroups() if the daemon is not
7849 60. The Exim user and group can now be bound into the binary as text strings
7850 that are looked up at the start of Exim's processing.
7852 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7854 62. Added $mailstore_basename variable.
7856 63. Installed patch to sieve.c from Michael Haardt.
7858 64. When Exim failed to open the panic log after failing to open the main log,
7859 the original message it was trying to log was written to stderr and debug
7860 output, but if they were not available (the usual case in production), it
7861 was lost. Now it is written to syslog before the two lines that record the
7862 failures to open the logs.
7864 65. Users' Exim filters run in subprocesses under the user's uid. It is
7865 possible for a "deliver" command or an alias in a "personal" command to
7866 provoke an address rewrite. If logging of address rewriting is configured,
7867 this fails because the process is not running as root or exim. There may be
7868 a better way of dealing with this, but for the moment (because 4.30 needs
7869 to be released), I have disabled address rewrite logging when running a
7870 filter in a non-root, non-exim process.
7876 1. The buildconfig auxiliary program wasn't quoting the value set for
7877 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7878 not defined. This bug was masked in 4.22 by the effect that was fixed in
7881 2. Some messages that were rejected after a message id was allocated were
7882 shown as "incomplete" by exigrep. It no longer does this for messages that
7883 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7885 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7886 have allow_domain_literals set, the ID did not get logged in the <= line.
7887 Domain literals are now always recognized in Message-ID: header lines.
7889 4. The first argument for a ${extract expansion item is the key name or field
7890 number. Leading and trailing spaces in this item were not being ignored,
7891 causing some misleading effects.
7893 5. When deliver_drop_privilege was set, single queue runner processes started
7894 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7895 same command in the process it spins off) were not dropping privilege.
7897 6. When the daemon running as "exim" started a queue runner, it always
7898 re-executed Exim in the spun-off process. This is a waste of effort when
7899 deliver_drop_privilege is set. The new process now just calls the
7900 queue-runner function directly.
7906 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7909 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7910 ignored. Though the use of -oP was forcing the writing of a pid file, it
7911 was always written to the default place.
7913 3. If the message "no IP address found for host xxxx" is generated during
7914 incoming verification, it is now followed by identification of the incoming
7915 connection (so you can more easily find what provoked it).
7917 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7919 5. Added some features to "harden" Exim a bit more against certain attacks:
7921 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7922 be put in Local/Makefile. This is like the never_users runtime option,
7923 but it cannot be overridden. The default setting is "root".
7925 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7926 prefix string with which any file named in a -C command line option
7929 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7930 is retained for -C and -D only if the caller of Exim is root. Without
7931 it, the exim user may also use -C and -D and retain privilege.
7933 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7934 command line option is disabled.
7936 6. Macro names set by the -D option must start with an upper case letter, just
7937 like macro names defined in the configuration file.
7939 7. Added "dereference=" facility to LDAP.
7941 8. Two instances of the typo "uknown" in the source files are fixed.
7943 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7944 the Configure-Makefile script screwed up while processing it.
7946 10. Incorporated PCRE 4.4.
7948 11. The SMTP synchronization check was not operating right at the start of an
7949 SMTP session. For example, it could not catch a HELO sent before the client
7950 waited for the greeting. There is now a check for outstanding input at the
7951 point when the greeting is written. Because of the duplex, asynchronous
7952 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7953 way, but not yet received, when the check is performed.
7955 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7956 on TCP/IP sockets, because this apparently causes some broken clients to
7959 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7960 unchanged) from the Cygwin maintainer.
7962 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7963 was supported instead of testing for mbx. Effectively a typo.
7965 15. The spa authenticator server code was not checking that the input it
7966 received was valid base64.
7968 16. The debug output line for the "set" modifier in ACLs was not showing the
7969 name of the variable that was being set.
7971 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7973 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7974 lookup on its own. Something else was needed to trigger the lookup. For
7975 example, a match in host_lookup or the need for a host name in a host list.
7976 Now, if $sender_host_name is referenced and the host name has not yet been
7977 looked up, a lookup is performed. If the lookup fails, the variable remains
7978 empty, and $host_lookup_failed is set to "1".
7980 19. Added "eqi" as a case-independent comparison operator.
7982 20. The saslauthd authentication condition could segfault if neither service
7983 nor realm was specified.
7985 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7986 error message that was logged was misleading, and incoming SMTP
7987 connections were dropped. The message is now more accurate, and temporary
7988 errors are given to SMTP connections.
7990 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7991 (except RSET) with a 421 error, until QUIT is received. However, it was
7992 failing to send a response to QUIT.
7994 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7995 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7996 ACL is now run after the helo_try_verify_hosts code.
7998 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7999 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8000 case-independent, so other case variants are also recognized). Apparently
8001 some systems use these upper case variants.
8003 25. If more than two messages were waiting for the same host, and a transport
8004 filter was specified for the transport, Exim sent two messages over the
8005 same TCP/IP connection, and then failed with "socket operation on non-
8006 socket" when it tried to send the third.
8008 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8010 27. The extern definition of crypt16() in expand.c was not being excluded when
8011 the OS had its own crypt16() function.
8013 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8014 as a preferred synonym for return_size_limit, both as an option and as an
8017 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8019 30. Changed the default configuration ACL to relax the local part checking rule
8020 for addresses that are not in any local domains. For these addresses,
8021 slashes and pipe symbols are allowed within local parts, but the sequence
8022 /../ is explicitly forbidden.
8024 31. SPA server authentication was not clearing the challenge buffer before
8027 32. log_message in a "warn" ACL statement was writing to the reject log as
8028 well as to the main log, which contradicts the documentation and doesn't
8029 seem right (because no rejection is happening). So I have stopped it.
8031 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8032 However, I am unable to do any testing of this.
8034 34. Fixed an infelicity in the appendfile transport. When checking directories
8035 for a mailbox, to see if any needed to be created, it was accidentally
8036 using path names with one or more superfluous leading slashes; tracing
8037 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8039 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8040 contents are added to the log line that is written for every discarded
8041 recipient. (Previously a log_message setting was ignored.)
8043 36. The ${quote: operator now quotes the string if it is empty.
8045 37. The install script runs exim in order to find its version number. If for
8046 some reason other than non-existence or emptiness, which it checks, it
8047 could not run './exim', it was installing it with an empty version number,
8048 i.e. as "exim-". This error state is now caught, and the installation is
8051 38. An argument was missing from the function that creates an error message
8052 when Exim fails to connect to the socket for saslauthd authentication.
8053 This could cause Exim to crash, or give a corrupted message.
8055 39. Added isip, isip4, and isip6 to ${if conditions.
8057 40. The ACL variables $acl_xx are now saved with the message, and can be
8058 accessed later in routers, transports, and filters.
8060 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8061 strings in the file are not string-expanded.
8063 42. If a MAIL command specified a SIZE value that was too large to fit into an
8064 int variable, the check against message_size_limit failed. Such values are
8065 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8066 day this will have to be increased, but I don't think I want to be around
8067 when emails are that large.
8074 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8075 iconv() is not standard in FreeBSD.
8077 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8078 IPv6 enabled. The observed symptom was a segmentation fault on return from
8079 the function os_common_find_running_interfaces() in src/os.c.
8081 3. In the check_special_case() function in daemon.c I had used "errno" as an
8082 argument name, which causes warnings on some systems. This was basically a
8083 typo, since it was named "eno" in the comments!
8085 4. The code that waits for the clock to tick (at a resolution of some fraction
8086 of a second) so as to ensure message-id uniqueness was always waiting for
8087 at least one whole tick, when it could have waited for less. [This is
8088 almost certainly not relevant at current processor speeds, where it is
8089 unlikely to ever wait at all. But we try to future-proof.]
8091 5. The function that sleeps for a time interval that includes fractions of a
8092 second contained a race. It did not block SIGALRM between setting the
8093 timer, and suspending (a couple of lines later). If the interval was short
8094 and the sigsuspend() was delayed until after it had expired, the suspension
8095 never ended. On busy systems this could lead to processes getting stuck for
8098 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8099 process, before it forks any delivery processes. The open lookup caching
8100 mechanism meant that the open file or database connection was passed into
8101 the delivery process. The problem was that delivery processes always tidy
8102 up cached lookup data. This could cause a problem for the next delivery
8103 process started by the queue runner, because the external queue runner
8104 process does not know about the closure. So the next delivery process
8105 still has data in the lookup cache. In the case of a file lookup, there was
8106 no problem because closing a file descriptor in a subprocess doesn't affect
8107 the parent. However, if the lookup was caching a connection to a database,
8108 the connection was closed, and the second delivery process was likely to
8109 see errors such as "PGSQL: query failed: server closed the connection
8110 unexpectedly". The problem has been fixed by closing all cached lookups
8111 in a queue runner before running a delivery process.
8113 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8114 seem to have the "const" qualifier which it has on other OS. I've
8117 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8118 *of the same type* (client or server) with the same public name that an
8119 error should be diagnosed.
8121 9. When Exim looked up a host name for an IP address, but failed to find the
8122 original IP address when looking up the host name (a safety check), it
8123 output the message "<ip address> does not match any IP for NULL", which was
8124 confusing, to say the least. The bug was that the host name should have
8125 appeared instead of "NULL".
8127 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8128 user that is built into the binary, and the -C or -D options is used, root
8129 privilege is dropped before the configuration file is read. In addition,
8130 logging is switched to stderr instead of the normal log files. If the
8131 configuration then re-defines the Exim user, the unprivileged environment
8132 is probably not what is expected, so Exim logs a panic warning message (but
8135 However, if deliver_drop_privilege is set, the unprivileged state may well
8136 be exactly what is intended, so the warning has been cut out in that case,
8137 and Exim is allowed to try to write to its normal log files.
8143 1. smtp_return_error_details was not giving details for temporary sender
8144 or receiver verification errors.
8146 2. Diagnose a configuration error if two authenticators have the same public
8149 3. Exim used not to create the message log file for a message until the first
8150 delivery attempt. This could be confusing when incoming messages were held
8151 for policy or load reasons. The message log file is now created at the time
8152 the message is received, and an initial "Received" line is written to it.
8154 4. The automatically generated man page for command line options had a minor
8155 bug that caused no ill effects; however, a more serious problem was that
8156 the procedure for building the man page automatically didn't always
8157 operate. Consequently, release 4.20 contains an out-of-date version. This
8158 shouldn't happen again.
8160 5. When building Exim with embedded Perl support, the script that builds the
8161 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8162 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8164 6. The freeze_tell option was not being used for messages that were frozen on
8165 arrival, either by an ACL or by local_scan().
8167 7. Added the smtp_incomplete_transaction log selector.
8169 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8170 was accepting AUTH without a new EHLO.
8172 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8173 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8176 10. Logging of TCP/IP connections (when configured) now happens in the main
8177 daemon process instead of the child process, so that the TCP/IP connection
8178 count is more accurate (but it can never be perfect).
8180 11. The use of "drop" in a nested ACL was not being handled correctly in the
8181 outer ACL. Now, if condition failure induced by the nested "drop" causes
8182 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8183 or "require"), the connection is dropped.
8185 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8186 that yield "discard" can now be used with an "accept" or a "discard" verb,
8187 but an error is generated for any others (because I can't see a useful way
8188 to define what should happen).
8190 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8191 are now processed in the same way as lines in the Exim configuration file.
8192 In particular, continuation lines are supported.
8194 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8196 15. Added -ti meaning -t -i.
8198 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8199 domains, and warn by logging if others are found.
8201 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8202 returned from GIFCONF when Exim is trying to find the list of interfaces on
8203 a host. The code in os.c has been modified to copy each ifreq to an aligned
8204 structure in all cases.
8206 Also, in some cases, the returned ifreq's were being copied to a 'struct
8207 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8208 means the last couple of bytes of an IPv6 address could be chopped if the
8209 ifreq contained only a normal sockaddr (14 bytes storage).
8211 18. Named domain lists were not supported in the hosts_treat_as_local option.
8212 An entry such as +xxxx was not recognized, and was treated as a literal
8215 19. Ensure that header lines added by a DATA ACL are included in the reject log
8216 if the ACL subsequently rejects the message.
8218 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8219 MD5 (which is deprecated).
8221 21. When testing a filter file using -bf, Exim was writing a message when it
8222 took the sender from a "From " line in the message, but it was not doing so
8223 when it took $return_path from a Return-Path: header line. It now does.
8225 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8226 with a valid header line field name (a series of printing characters
8227 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8229 23. Changed "disc" in the source to "disk" to conform to the documentation and
8230 the book and for uniformity.
8232 24. Ignore Sendmail's -Ooption=value command line item.
8234 25. When execve() failed while trying to run a command in a pipe transport,
8235 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8236 could be confused with a return value of 69 from the command itself. This
8237 has been changed to 127, the value the shell returns if it is asked to run
8238 a non-existent command. The wording for the related log line suggests a
8239 non-existent command as the problem.
8241 26. If received_header_text expands to an empty string, do not add a Received:
8242 header line to the message. (Well, it adds a token one on the spool, but
8243 marks it "old" so that it doesn't get used or transmitted.)
8245 27. Installed eximstats 1.28 (addition of -nt option).
8247 28. There was no check for failure on the call to getsockname() in the daemon
8248 code. This can fail if there is a shortage of resources on the system, with
8249 ENOMEM, for example. A temporary error is now given on failure.
8251 29. Contrary to the C standard, it seems that in some environments, the
8252 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8253 program. Exim now does this explicitly; it affects the formatting of
8254 timestamps using strftime().
8256 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8257 complaints. I've now initialized all the variables, to avoid this.
8259 32. Header lines added by a system filter were not being "seen" during
8260 transport-time rewrites.
8262 33. The info_callback() function passed to OpenSSL is set up with type void
8263 (*)(SSL *, int, int), as described somewhere. However, when calling the
8264 function (actually a macro) that sets it up, the type void(*)() is
8265 expected. I've put in a cast to prevent warnings from picky compilers.
8267 34. If a DNS black list lookup found a CNAME record, but there were no A
8268 records associated with the domain it pointed at, Exim crashed.
8270 35. If a DNS black list lookup returned more than one A record, Exim ignored
8271 all but the first. It now scans all returned addresses if a particular IP
8272 value is being sought. In this situation, the contents of the
8273 $dnslist_value variable are a list of all the addresses, separated by a
8276 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8277 to accept a host name and all its aliases if the forward lookup for any of
8278 them yielded the IP address of the incoming connection. Now it accepts only
8279 those names whose forward lookup yields the correct IP address. Any other
8280 names are discarded. This closes a loophole whereby a rogue DNS
8281 administrator could create reverse DNS records to break through a
8282 wildcarded host restriction in an ACL.
8284 37. If a user filter or a system filter that ran in a subprocess used any of
8285 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8286 the wrong values were passed to the pipe command ($thisaddress had the
8287 value of $0, $0 had the value of $1, etc). This bug was introduced by
8288 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8290 38. Improved the line breaking for long SMTP error messages from ACLs.
8291 Previously, if there was no break point between 40 and 75 characters, Exim
8292 left the rest of the message alone. Two changes have been made: (a) I've
8293 reduced the minimum length to 35 characters; (b) if it can't find a break
8294 point between 35 and 75 characters, it looks ahead and uses the first one
8295 that it finds. This may give the occasional overlong line, but at least the
8296 remaining text gets split now.
8298 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8299 file descriptors might be low, and that setting 1000 would always raise it.
8300 It turns out that in some environments, the limit is already over 1000 and
8301 that lowering it causes trouble. So now Exim takes care not to decrease it.
8303 40. When delivering a message, the value of $return_path is set to $sender_
8304 address at the start of routing (routers may change the value). By an
8305 oversight, this default was not being set up when an address was tested by
8306 -bt or -bv, which affected the outcome if any router or filter referred to
8309 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8310 log only when "message" or "log_message" are set. However, if one of the
8311 conditions was an address verification, or a call to a nested ACL, the
8312 messages generated by the underlying test were being passed through. This
8313 no longer happens. The underlying message is available in $acl_verify_
8314 message for both "message" and "log_message" expansions, so it can be
8315 passed through if needed.
8317 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8318 new expansion $bh_ to give the encoded byte string without charset
8319 translation. Translation happens only if iconv() is available; HAVE_ICONV
8320 indicates this at build time. HEADERS_CHARSET gives the charset to
8321 translate to; headers_charset can change it in the configuration, and
8322 "headers charset" can change it in an individual filter file.
8324 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8325 that creates RFC 2047 encoded "words" labels them as that charset instead
8326 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8327 expansion operator; (ii) when Exim creates a From: line for a local
8328 message; (iii) when a header line is rewritten to include a "phrase" part.
8330 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8331 buggy, causing it to skip the first lines of messages whose message ID
8332 ended in 'D'. This would not have bitten before Exim release 4.14, because
8333 message IDs were unlikely to end in 'D' before then. The effect was to have
8334 incorrect size information for certain domains.
8336 45. #include "config.h" was missing at the start of the crypt16.c module. This
8337 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8340 46. If there was a timeout during a "random" callout check, Exim treated it as
8341 a failure of the random address, and carried on sending RSET and the real
8342 address. If the delay was just some slowness somewhere, the response to the
8343 original RCPT would be taken as a response to RSET and so on, causing
8344 mayhem of various kinds.
8346 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8347 when I implemented it. It didn't allow for the fact that some option values
8348 may legitimately be negative (e.g. size_addition), and it didn't even do
8349 the right test for positive values.
8351 48. Domain names in DNS records are case-independent. Exim always looks them up
8352 in lower case. Some resolvers return domain names in exactly the case they
8353 appear in the zone file, that is, they may contain uppercase letters. Not
8354 all resolvers do this - some return always lower case. Exim was treating a
8355 change of case by a resolver as a change of domain, similar to a widening
8356 of a domain abbreviation. This triggered its re-routing code and so it was
8357 trying to route what was effectively the same domain again. This normally
8358 caused routing to fail (because the router wouldn't handle the domain
8359 twice). Now Exim checks for this case specially, and just changes the
8360 casing of the domain that it ultimately uses when it transmits the message
8363 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8366 50. If a filter generated a file delivery with a non-absolute name (possible if
8367 no home directory exists for the router), the forbid_file option was not
8370 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8371 the existing equality matching.
8373 52. Exim was using ints instead of ino_t variables in some places where it was
8374 dealing with inode numbers.
8376 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8377 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8378 called TMPDIR, and if it finds it is different, it changes its value.
8380 54. The smtp_printf() function is now made available to local_scan() so
8381 additional output lines can be written before returning. There is also an
8382 smtp_fflush() function to enable the detection of a dropped connection.
8383 The variables smtp_input and smtp_batched_input are exported to
8386 55. Changed the default runtime configuration: the message "Unknown user"
8387 has been removed from the ACL, and instead placed on the localuser router,
8388 using the cannot_route_message feature. This means that any verification
8389 failures that generate their own messages won't get overridden. Similarly,
8390 the "Unrouteable address" message that was in the ACL for unverifiable
8391 relay addresses has also been removed.
8393 56. Added hosts_avoid_esmtp to the smtp transport.
8395 57. The exicyclog script was not checking for the esoteric option
8396 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8397 will work only if exicyclog is run under the appropriate euid.
8399 58. Following a discussion on the list, the rules by which Exim recognises line
8400 endings on incoming messages have been changed. The -dropcr and drop_cr
8401 options are now no-ops, retained only for backwards compatibility. The
8402 following line terminators are recognized: LF CRLF CR. However, special
8403 processing applies to CR:
8405 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8406 nor a local message in the state where . is a terminator.
8408 (ii) If a bare CR is encountered in a header line, an extra space is added
8409 after the line terminator so as not to end the header. The reasoning
8410 behind this is that bare CRs in header lines are most likely either
8411 to be mistakes, or people trying to play silly games.
8413 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8414 was being incorrectly given as 18 bytes larger than it should have been.
8415 This is a VOB (very old bug).
8417 60. This may never have affected anything current, but just in case it has:
8418 When the local host is found other than at the start of a list of hosts,
8419 the local host, those with the same MX, and any that follow, are discarded.
8420 When the list in question was part of a longer list of hosts, the following
8421 hosts (not currently being processed) were also being discarded. This no
8422 longer happens. I'm not sure if this situation could ever has previously
8425 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8428 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8429 header. This is something that is recommended in a new Internet Draft, and
8430 is something that is documented as being done by Sendmail. There are two
8431 possible values. For messages generated by the autoreply transport, Exim
8434 Auto-Submitted: auto-replied
8436 whereas for all other generated messages (e.g. bounces) it adds
8438 Auto-Submitted: auto-generated
8440 63. The "personal" condition in filters now includes a test for the
8441 Auto-Submitted: header. If it contains the string "auto-" the message it
8442 not considered personal.
8444 64. Added rcpt_include_affixes as a generic transport option.
8446 65. Added queue_only_override (default true).
8448 66. Added the syslog_duplication option.
8450 67. If what should have been the first header line of a message consisted of
8451 a space followed by a colon, Exim was mis-interpreting it as a header line.
8452 It isn't of course - it is syntactically invalid and should therefore be
8453 treated as the start of the message body. The misbehaviour could have
8454 caused a number of strange effects, including loss of data in subsequent
8455 header lines, and spool format errors.
8457 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8458 client host had authenticated. This control can now be exercised by an ACL
8459 for more flexibility.
8461 69. By default, callouts do not happen when testing with -bh. There is now a
8462 variant, -bhc, which does actually run the callout code, including
8463 consulting and updating the callout cache.
8465 70. Added support for saslauthd authentication, courtesy of Alexander
8468 71. If statvfs() failed on the spool or log directories while checking their
8469 size for availability, Exim confusingly gave the error "space shortage".
8470 Furthermore, in debugging mode it crashed with a floating point exception.
8471 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8472 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8473 serious problem, Exim now writes to the main and panic logs when this
8474 happens, with details of the failure. It then refuses to accept the
8475 incoming message, giving the message "spool directory problem" or "log
8476 directory problem" with a 421 code for SMTP messages.
8478 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8479 0, 1, and 2 exist, because some OS complain for execs without them (see
8480 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8481 descriptors. However, the code omitted to check that the open succeeded,
8482 causing mysterious errors if for some reason the permissions on /dev/null
8483 got screwed. Now Exim writes a message to the main and panic logs, and
8484 bombs out if it can't open /dev/null.
8486 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8487 interact so that it is all more flexible. It is supposed to remain
8488 backwards compatible. Also added extra_local_interfaces.
8490 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8491 to bomb out with an assertion failure - to the client this appears as a
8492 connection drop. This problem occurs in the part of the code that was taken
8493 from the Samba project. Fortunately, the assertion is in a very simple
8494 function, so I have fixed this by reproducing the function inline in the
8495 one place where it is called, and arranging for authentication to fail
8496 instead of killing the process with assert().
8498 75. The SPA client code was not working when the server requested OEM rather
8499 than Unicode encoding.
8501 76. Added code to make require_files with a specific uid setting more usable in
8502 the case where statting the file as root fails - usually a non-root-mounted
8503 NFS file system. When this happens and the failure is EACCES, Exim now
8504 forks a subprocess and does the per-uid checking as the relevant uid.
8506 77. Added process_log_path.
8508 78. If log_file_path was not explicitly set, a setting of check_log_space or
8509 check_log_inodes was ignored.
8511 79. If a space check for the spool or log partitions fails, the incident is now
8512 logged. Of course, in the latter case the data may get lost...
8514 80. Added the %p formatting code to string_format() so that it can be used to
8515 print addresses in debug_print(). Adjusted all the address printing in the
8516 debugging in store.c to use %p rather than %d.
8518 81. There was a concern that a line of code in smtp_in.c could overflow a
8519 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8520 initially expressed, the concern was not well-founded, because trailing
8521 spaces are removed early. However, if the trailing spaces were followed by
8522 a NULL, they did not get removed, so the overflow was possible. Two fixes
8525 (a) I re-wrote the offending code in a cleaner fashion.
8526 (b) If an incoming SMTP command contains a NULL character, it is rejected
8529 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8530 runs initgroups(), so that if the Exim user is in any additional groups,
8531 they will be used during message reception.
8537 The change log for 4.20 and earlier releases has been archived.