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 The hosts_connection_nolog main option now also controls "no MAIL in
9 SMTP connection" log lines.
11 JH/02 Option default value updates:
12 - queue_fast_ramp (main) true (was false)
13 - remote_max_parallel (main) 4 (was 2)
15 JH/03 Cache static regex pattern compilations, for use by ACLs.
17 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
18 Make the rewrite never match and keep the logging. Trust the
19 admin to be using verify=header-syntax (to actually reject the message).
21 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
22 (under Linux) we watch the dir containing the final file; previously
23 it would be the dir with the first symlink. We still do not monitor
26 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
27 dn_expand() is happy to pass them through.
29 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
30 the file with the proof had an unchanged name, the new proof(s) were
31 loaded on top of the old ones (and nover used; the old ones were stapled).
33 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
34 more than one message arrived in a single connection a reference from
35 the earlier message could be re-used. Often a sigsegv resulted.
36 These variables were introduced in Exim 4.87.
37 Debug help from Graeme Fowler.
39 JH/09 Fix ${filter } for conditions that modify $value. Previously the
40 modified version would be used in construction the result, and a memory
43 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
44 Find and fix by Jasen Betts.
46 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
47 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
48 the systemwide configuration to override the Exim config.
50 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
51 API changes in libopendmarc.
53 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
54 pid 1, in the normal "background daemon" mode, having to drop process-
55 group leadership also lost track of needing to create listener sockets.
57 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
58 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
60 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
61 a capture group which obtained no text (eg. "(abc)*" matching zero
62 occurrences) could cause a segfault if the corresponding $<n> was
65 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
66 included a close-brace character (eg. it itself used an expansion) an
69 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
70 starting TLS. Previously it was after, meaning that attackers on such
71 ports had to be screened using the host_reject_connection main config
72 option. The new sequence aligns better with the STARTTLS behaviour, and
73 permits defences against crypto-processing load attacks, even though it
74 is strictly an incompatible change.
75 Also, avoid sending any SMTP fail response for either the connect ACL
76 or host_reject_connection, for TLS-on-connect ports.
78 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
79 Previously this was not permitted, but it makes reasonable sense.
80 While there, restore a restriction on using it from a connect ACL; given
81 the change JH/16 it could only return false (and before 4.91 was not
84 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
85 was exactly sized compared to the log buffer, a crash occurred with the
86 misleading message "bad memory reference; pool not found".
87 Found and traced by Jasen Betts.
89 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
90 dns_again_means_nonexist included an element causing a DNS lookup which
91 iteslf returned DNS_AGAIN, unbounded recursion occurred. Possible results
92 included (though probably not limited to) a process crash from stack
93 memory limit, or from excessive open files. Replace this with a paniclog
94 whine (as this is likely a configuration error), and returning
97 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
98 this always failed, probably leading to the usual downgrade to in-clear
101 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
102 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
103 to not checking that list for these lookups.
105 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
108 JH/23 Fix crash in string expansions. Previously, if an empty variable was
109 immediately followed by an expansion operator, a null-indirection read
110 was done, killing the process.
112 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
113 include an SMTP response string which is longer than that supported
114 by the delivering transport. Alleviate by wrapping such lines before
117 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
118 chars (RFC limit). Previously a limit of 12 items was made, which with
119 a not-impossible References: in the message being bounced could still
120 be over-large and get stopped in the transport.
122 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
123 close. Previously a bare socket close was done.
125 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
128 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
129 message being considered for delivery was already being handled by
130 another process, and having an SMTP connection already open, the function
131 to close it tried to use an uninitialized variable. This would afftect
132 high-volume sites more, especially when running mailing-list-style loads.
133 Pollution of logs was the major effect, as the other process delivered
134 the message. Found and partly investigated by Graeme Fowler.
136 JH/29 Change format of the internal ID used for message identification. The old
137 version only supported 31 bits for a PID element; the new 64 (on systems
138 which can use Base-62 encoding, which is all currently supported ones
139 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
140 and must use Base-36). The new ID is 23 characters rather than 16, and is
141 visible in various places - notably logs, message headers, and spool file
142 names. Various of the ancillary utilities also have to know the format.
143 As well as the expanded PID portion, the sub-second part of the time
144 recorded in the ID is expanded to support finer precision. Theoretically
145 this permits a receive rate from a single comms channel of better than the
147 The major timestamp part of the ID is not changed; at 6 characters it is
148 usable until about year 3700.
149 Updating from previously releases is fully supported: old-format spool
150 files are still usable, and the utilities support both formats. New
151 message will use the new format. The one hints-DB file type which uses
152 message-IDs (the transport wait- DB) will be discarded if an old-format ID
153 is seen; new ones will be built with only new-format IDs.
154 Optionally, a utility can be used to convert spool files from old to new,
155 but this is only an efficiency measure not a requirement for operation
156 Downgrading from new to old requires running a provided utility, having
157 first stopped all operations. This will convert any spool files from new
158 back to old (losing time-precision and PID information) and remove any
159 wait- hints databases.
161 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
162 we treated them as item separators when parsing for a list item, but they
163 need to be protected by the doublequotes. While there, add handling for
166 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
167 Found and fixed by Jasen Betts. No testcase for this as my usual text
168 editor insists on emitting only valid UTF-8.
173 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
174 after reception to before a subsequent reception. This should
175 mean slightly faster delivery, and also confirmation of reception
178 JH/02 Move from using the pcre library to pcre2. The former is no longer
179 being developed or supported (by the original developer).
181 JH/03 Constification work in the filters module required a major version
182 bump for the local-scan API. Specifically, the "headers_charset"
183 global which is visible via the API is now const and may therefore
184 not be modified by local-scan code.
186 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
187 sendfile() didi not account for the way the ClamAV driver code called it.
189 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
190 time check was being done for every character; replace that with one
193 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
194 sent was prefixed with a length byte.
196 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
197 RFC 5321. Previously Dovecot (at least) would log errors during
200 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
201 in 4.61 without a reason logged. Binaries will be bigger, which might
202 matter on diskspace-constrained systems, but debug is easier.
204 JH/09 Fix macro-definition during "-be" expansion testing. The move to
205 write-protected store for macros had not accounted for these runtime
206 additions; fix by removing this protection for "-be" mode.
208 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
209 handing out large-numbered file descriptors, violating the usual Unix
210 assumption (and required by Posix) that the lowest possible number will be
211 allocated by the kernel when a new one is needed. In the daemon, and any
212 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
213 are not useable for FD_SET() [and hence select()] and overwrite the stack.
214 Assorted crashes happen.
216 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
217 main-section options or in a connect ACL, the value from the first ever
218 connection was never replaced for subsequent connections. Found by
221 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
222 though only once PCRE2 was introduced: the memory accounting used under
223 debug offset allocations by an int, giving a hard trap in early startup.
224 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
226 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
227 with underbars is given. The write-protection of configuration introduced
228 in 4.95 trapped when normalisation was applied to an option not needing
231 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
233 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
234 failing to close the certificates directory, every hour or any time it
237 JH/16 Debugging initiated by an ACL control now continues through into routing
238 and transport processes. Previously debugging stopped any time Exim
239 re-execs, or for processing a queued message.
241 JH/17 The "expand" debug selector now gives more detail, specifically on the
242 result of expansion operators and items.
244 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
245 bad comparison between the option value and the name of the file to
246 be included was done, and a mismatch was wrongly identified.
247 4.88 to 4.95 are affected.
249 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
251 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
252 supplied as the db file-pair basename. Previously, if a directory
253 path was given, for example via the autoreply "once" option, the DB
254 file.pag and file.dir files would be created in that directory's
257 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
258 "taint" log_selector. These were previously deprecated.
260 JH/22 Fix static address-list lookups to properly return the matched item.
261 Previously only the domain part was returned.
263 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
264 the call into OpenSSL to send a TLS Close was being repeated; this
265 resulted in the library waiting for the peer's Close. If that was never
266 sent we waited forever. Fix by tracking send calls.
268 JH/24 The ${run} expansion item now expands its command string elements after
269 splitting. Previously it was before; the new ordering makes handling
270 zero-length arguments simpler. The old ordering can be obtained by
271 appending a new option "preexpand", after a comma, to the "run".
273 JH/25 Taint-check exec arguments for transport-initiated external processes.
274 Previously, tainted values could be used. This affects "pipe", "lmtp" and
275 "queryprogram" transport, transport-filter, and ETRN commands.
276 The ${run} expansion is also affected: in "preexpand" mode no part of
277 the command line may be tainted, in default mode the executable name
280 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
281 the the facility was not passed across execs, and only the first message
282 passed over a connection could use BDAT; any further ones using DATA.
284 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
285 uses $sending_ip_address and an interface is specified.
286 Previously any use of the local address in the EHLO name disabled
287 PIPECONNECT, the common case being to use the rDNS of it.
289 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
290 resumption. Previously verify failed because no certificate status is
291 passed on the wire for the restarted session. Fix by using the recorded
292 ocsp status of the stored session for the new connection.
294 JH/29 TLS resumption: the key for session lookup in the client now includes
295 more info that a server could potentially use in configuring a TLS
296 session, avoiding oferring mismatching sessions to such a server.
297 Previously only the server IP was used.
299 JH/30 Fix string_copyn() for limit greater than actual string length.
300 Previously the copied amount was the limit, which could result in a
301 overlapping memcpy for newly allocated destination soon after a
302 source string shorter than the limit. Found/investigated by KM.
304 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
305 close; it may be needed for a subsequent connection. This caused a
306 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
308 JH/32 Fix CHUNKING for a second message on a connection when the first was
309 rejected. Previously we did not reset the chunking-offered state, and
310 erroneously rejected the BDAT command. Investigation help from
313 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
314 an empty address. Previously the expansion returned an error.
316 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
317 proxy. Previously these were misparsed, leading to paniclog entries.
323 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
324 related applications. Previously an "H" was used where available info
325 says that "M" should be, so change to match.
327 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
328 as arguments, so an implementation trying to copy these into a local
329 buffer was taking a taint-enforcement trap. Fix by using dynamically
330 created buffers. Similar fix for radius expansion condition.
332 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
333 reasonable, eg. to count headers. Fix by using dynamically created
334 buffers rather than a local. Do similar fixes for ACL actions "dcc",
335 "log_reject_target", "malware" and "spam"; the arguments are expanded
336 so could be handling tainted values.
338 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
339 broken the (no-op) support for this sendmail command. Restore it
340 to doing nothing, silently, and returning good status.
342 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
343 record path was given (or the default used) without a leading directory
344 path, an error occurred on trying to open it. Use the transport's working
347 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
348 transport. Previously it was the name on the DNS A-record; use instead
349 the head of the CNAME chain leading there (if there is one). This seems
350 to align better with RFC 6125.
352 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
353 smtp_accept_max_per_host allocated resources which were not released
354 when the limit was exceeded. This eventually crashed the daemon. Fix
355 by adding a release action in that path.
357 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
358 expanded; previously using tainted values was rejected. Fix by using
359 dynamically-created buffers.
361 JH/09 Relax restrictions on ACL verify condition needing access to message
362 headers. Previously they were only permitted in data and non-smtp ACLs;
363 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
364 not_blind, header_sender and header_names_ascii verification.
366 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
367 Previously a macro used one argument twice; when called with the
368 argument as an expression having side-effects, incorrect operation
369 resulted. Use an inlineable function.
371 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
372 held open for a verify callout. Previously this wan not accounted for
373 and a corrupt onward SMTP conversation resulted.
375 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
376 Previously they were embedded naively in the constructed address; when
377 needed, strip the quoting and quote the entire local_part.
378 Also make the inbound_srs expansion condition handle quoting.
380 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
381 excluded, not matching the documentation.
383 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
384 was given for the sqlite_dbfile a trap resulted.
386 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
387 "name" argument resulted in a trap. There is no reason to disallow such;
388 this was a coding error.
390 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
391 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
392 spent suspended, ignoring the POSIX definition. Previously we assumed
393 it did and a constant offset from real time could be used as a correction.
394 Change to using the same clock source for the start-of-message and the
395 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
396 exists, just to get a clock slightly more aligned to reality.
398 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
399 RFC says it is optional some validators care. The missing char was not
400 intended but triggered by a line-wrap alignment. Discovery and fix by
401 Guillaume Outters, hacked on by JH.
403 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
404 name being quoted was tainted a trap would be taken. Fix by using
405 dynamically created buffers. The routine could have been called by a
406 rewrite with the "h" flag, by using the "-F" command-line option, or
407 by using a "name=" option on a control=submission ACL modifier.
409 JH/19 SPF: change the Authentication-Results expansion component to give
410 smtp.helo when the sender domain is empty. Previously it gave
413 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
414 not in 127.0.0.0/8 to help in spotting list domains taken over by a
415 domain-parking registrar.
417 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
418 Previously when a whitespace character was specified it was not inserted
419 after removing the newline.
421 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
422 the domain part of the recipient address. This overrides any tls_sni
423 option set, which was previously used.
425 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
428 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
429 is_tainted() had an off-by-one error in the overenthusiastic direction.
430 Find and fix by Gavan. Although NetBSD is not a supported platform for
431 4.94 this bug could affect other platforms.
433 PP/01 Fix default prime selection to be consistent.
434 One path used ike23 still, instead of exim.dev.20160529.3; now both
435 execution flows will use the same DH primes (currently
436 exim.dev.20160529.3).
438 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
439 option in smtp transport, to match the documentation. Previously
440 verification was not being done in some cases where it should have been.
442 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
443 than one server was defined and depending on the platform memory layout
444 details, an internal consistency trap could be hit while walking the list
447 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
448 files. The value is used by the authresults expansion item. Previously
449 if this was used in a router or transport, a crash could result.
451 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
452 have a sufficient incidence of EINTR returns from select that an
453 interaction with other operations done by the main daemon loop exposed
454 a bug in the error-handling. This was benign apart from the log
457 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
458 for consistency with delivered "=>" and failed "**" lines. While we're
459 there, handle PRX and TFO.
461 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
462 applied. This resulted, if any header-line rewrite rules were configured,
463 in a panic-log triggerable by sending a message with a long address in
464 a header. Fix by increasing the arbitrary limit to larger than a single
465 (dewrapped) 5322 header line maximum size.
467 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
468 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
469 RFC 6648 which deprecates X- options in protocols as a general practice.
470 Changeover between the implementations is handled by the mechanisms
473 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
474 a remote which uses callout/hold. Previously the local was queued.
476 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
479 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
480 log line. The asterisk is now consistently appended to the remote IP
481 (and port, if given), and will also be provided on defer and fail log
482 lines. Previously it could be placed on the local IP if that was being
483 logged, and was only provided on delivery lines.
485 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
487 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
488 authenticator client_send option. Previously the next char, after a pair
489 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
490 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
491 documentation. There is still no way to get a leading ^ immediately
492 after a NUL (ie. for the password of a PLAIN method authenticator.
494 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
495 files. For bad sizes read, delete the record and whine to paniclog.
497 JH/38 When logging an AUTH failure, as server, do not include sensitive
498 information. Previously, the credentials would be included if given
499 as part of the AUTH command line and an ACL denied authentication.
501 JH/39 Bug 2691: fix $local_part_data. When the matching list element
502 referred to a file, bad data was returned. This likely also affected
505 JH/40 The gsasl authenticator now supports caching of the salted password
506 generated by the client-side implementation. This required the addition
507 of a new variable: $auth4.
509 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
510 left undeleted; the attempt to re-create it then failed - resulting in
511 the usual "SIGHUP tp have daemon reload configuration" to not work.
512 This affected any platform not supporting "abstract" Unix-domain
513 sockets (i.e. not Linux).
515 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
516 recipients" response to RCPT in a later response, with a 250. The
517 previous coding assumed this would not happen, and under PIPELINING
518 would result in both lost and duplicate recipients for a message.
520 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
521 Previously the weighting was incorrectly applied. Similar fix for socks
522 proxies. Found and fixed by Heiko Schlichting.
524 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
525 not handle sub-lists included using the +namedlist syntax. While
526 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
527 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
530 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
531 Previously the permanent pool was used, so the sore could not be freed.
532 This meant a connection with many messages would use continually-growing
535 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
536 per-pool so as not to waste too much space. Previously a constant size
537 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
538 DOS attacks harder. The cost is wasted memory use in the larger blocks.
540 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
541 same space repeatedly, and a smaller process footprint.
543 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
544 for GnuTLS. Previously the name started "%s" which, while not a bug,
545 looked as if if might be one.
547 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
548 "continued connection") make the $proxy_* variables available. Previously
549 the information was not passed across the exec() call for subsequent
550 transport executions. This also mean that the log lines for the
551 messages can show the proxy information.
553 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
554 receive time. With modern systems the difference is significant.
555 The historical behaviour can be restored by disabling (a new) log_selector
556 "queue_time_exclusive".
558 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
559 content) were specifically tested for. Now, also cover expansions
560 resulting in ACL names and inline ACL content.
562 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
563 making it unusable in complex expressions.
565 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
566 fail with a taint-check on the spoolfile name, and leave the message
569 HS/01 Enforce absolute PID file path name.
571 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
573 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
575 PP/02 Bug 2643: Correct TLS DH constants.
576 A missing NUL termination in our code-generation tool had led to some
577 incorrect Diffie-Hellman constants in the Exim source.
578 Reported by kylon94, code-gen tool fix by Simon Arlott.
580 PP/03 Impose security length checks on various command-line options.
581 Fixes CVE-2020-SPRSS reported by Qualys.
583 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
584 better. Reported by Qualys.
586 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
587 providing a particularly obnoxious sender full name.
590 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
592 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
595 PP/08 Change default for recipients_max from unlimited to 50,000.
597 PP/09 Fix security issue with too many recipients on a message (to remove a
598 known security problem if someone does set recipients_max to unlimited,
599 or if local additions add to the recipient list).
600 Fixes CVE-2020-RCPTL reported by Qualys.
602 PP/10 Fix security issue in SMTP verb option parsing
603 Fixes CVE-2020-EXOPT reported by Qualys.
605 PP/11 Fix security issue in BDAT state confusion.
606 Ensure we reset known-good where we know we need to not be reading BDAT
607 data, as a general case fix, and move the places where we switch to BDAT
608 mode until after various protocol state checks.
609 Fixes CVE-2020-BDATA reported by Qualys.
611 HS/03 Die on "/../" in msglog file names
613 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
614 the Exim runtime user are allowed to create files.
616 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
619 QS/03 When reading the output from interpreted forward files we do not
620 pass the pipe between the parent and the interpreting process to
621 executed child processes (if any).
623 QS/04 Always die if requested from internal logging, even is logging is
626 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
627 the API; compilation noo longer completes with DMARC support included.
628 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
629 been reported on other platforms.
631 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
633 JH/56 Make the majority of info read from config files readonly, for defence-in-
634 depth against exploits. Suggestion by Qualys.
635 Not supported on Solaris 10.
637 JH/57 Fix control=fakreject for a custom message containing tainted data.
638 Previously this resulted in a log complaint, due to a re-expansion present
639 since fakereject was originally introduced.
641 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
642 modifier was given, a loop resulted.
644 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
645 pipelined SMTP command followed the BDAT LAST then it would be
646 incorrectly treated as part of the message body, causing a verification
649 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
650 require looser validation rules than those for 821-level addresses,
651 which only permit IP addresses.
657 JH/01 Avoid costly startup code when not strictly needed. This reduces time
658 for some exim process initialisations. It does mean that the logging
659 of TLS configuration problems is only done for the daemon startup.
661 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
663 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
664 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
667 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
668 DKIM signing is being done. Previously a transport_filter would always
669 disable CHUNKING, falling back to traditional DATA.
671 JH/05 Regard command-line recipients as tainted.
673 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
675 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
676 PAM library frees one of the arguments given to it, despite the
677 documentation. Therefore a plain malloc must be used.
679 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
680 on-stack buffers were used, resulting in a taint trap when DSN information
681 copied from a received message was written into the buffer.
683 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
684 the ordering of its ARC headers. This caused a crash.
686 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
687 a new record was being constructed with information from the peer, a trap
690 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
691 installation would get error messages from DMARC verify, when it hit the
692 nonexistent file indicated by the default. Distros wanting DMARC enabled
693 should both provide the file and set the option.
694 Also enforce no DMARC verification for command-line sourced messages.
696 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
697 could, depending on the platform, hang at the STARTTLS response.
699 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
700 message on a connection. Previously if one message had ARC headers and
701 the following one did not, a crash could result when adding an
702 Authentication-Results: header.
704 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
705 Exim main code and Exim-related utities. The introduction of taint
706 tracking also did many adjustments to string handling. Since then, eximon
707 frequently terminated with an assert failure.
709 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
710 check for 452 responses. This slightly helps the inefficieny of doing
711 a large alias-expansion into a recipient-limited target. The max_rcpt
712 transport option still applies (and at the current default, will override
713 the new feature). The check is done for either cause of synch, and forces
714 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
715 connection. The new facility is not tunable at this time.
717 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
718 library live data was being used, so the results became garbage. Make
719 copies while it is still usable.
721 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
722 on delivery deferred (==) and failed (**) lines (if a delivery was
723 attemtped). Previously it was only on completion (=>) lines.
725 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
726 for the expansion of the server_scram_iter and server_scram_salt options.
728 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
729 are now specifically given a NO_DATA response without hitting the system
730 resolver. The library goes on to do the now-standard TXT lookup.
731 Use of dnsdb lookups is not affected.
733 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
734 only retrieve the errormessage once. Previously two calls to dlerror()
735 were used, and the second one (for mainlog/paniclog) retrieved null
738 JH/20 Taint checking: disallow use of tainted data for
739 - the appendfile transport file and directory options
740 - the pipe transport command
741 - the autoreply transport file, log and once options
742 - file names used by the redirect router (including filter files)
744 - paths used by single-key lookups
745 Previously this was permitted.
747 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
748 adjusted the size of a major service buffer; this failed because the
749 buffer was in use at the time. Change to a compile-time increase in the
750 buffer size, when this authenticator is compiled into exim.
752 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
753 previous fast-mode was untenable in the face of glibs using mmap to
754 support larger malloc requests.
756 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
757 New values supported, if defined on system where compiled:
758 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
759 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
761 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
762 running a limited number of proceses in parallel, a benefit is gained. The
763 amount varies with the platform hardware and load. The use of the option
764 queue_run_in_order means we cannot do this, as ordering becomes
767 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
768 had introduced a string-copy (for ensuring NUL-termination) which was not
769 appropriate for that case, which can include embedded NUL bytes in the
770 block of data. Investigation showed the copy to actually be needless, the
771 data being length-specified.
773 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
774 done during a receiving connection, and both used TLS, global info was
775 used rather than per-connection info for tracking the state of data
776 queued for transmission. This could result in a connection hang.
778 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
779 Previously, when delivering serveral messages down a single connection
780 only the first would provide a SIZE. This was due to the size information
781 not being properly tracked.
783 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
784 TAI (at 37 seconds currently), pretend to be in UTC for time-related
785 expansion and logging. Previously, spurious values such as a future
786 minute could be seen.
788 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
789 it could crash from a null-deref. This could also affect the
790 ${addresses: } operator and ${readsock } item.
792 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
793 message following a mime one, the variable was not reset.
795 JH/30 When an pipelined-connect fails at the first response, assume incorrect
796 cached capability (perhaps the peer reneged?) and immediately retry in
799 JH/31 Fix spurious detection of timeout while writing to transport filter.
801 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
802 an attempt to copy the string was made before checking it.
804 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
805 taint of the lookup key was maintained; we now regard the presence in the
806 filesystem as sufficient validation.
808 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
809 argument is supplied.
811 JH/35 The dsearch lookup now requires that the directory is an absolute path.
812 Previously this was not checked, and nonempty relative paths made an
813 access under Exim's current working directory.
815 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
816 Previously no event was raised.
818 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
819 parameter supplied by the sender MAIL FROM command. Previously it was
820 ignored, and only the check_spool_space option value for the required
823 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
824 the size of the signing public-key. Previously it was instead giving
825 the size of the signature hash.
827 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
828 the default. See the (new) dkim_verify_min_keysizes option.
830 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
831 and an ACL use a lookup for checking either the local_part or domain,
832 stale data could be accessed. Ensure that variable references are
833 dropped between messages.
835 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
836 by the client was not checked as pointing within response data before
837 being used. A malicious client could thus cause an out-of-bounds read and
838 possibly gain authentication. Fix by adding the check.
840 JH/42 Internationalisation: change the default for downconversion in the smtp
841 transport to be "if needed". Previously it was "as previously set" for
842 the message, which usually meant "if needed" for message-submission but
843 "no" for everything else. However, MTAs have been seen using SMTPUTF8
844 even when the envelope addresses did not need it, resulting in forwarding
845 failures to non-supporting MTAs. A downconvert in such cases will be
846 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
847 transport. The change does mean that addresses needing conversion will
848 be converted when previously a delivery failure would occur.
850 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
851 response was received it would be used unchecked in a fail-DSN, violating
852 standards on line-length limits. Truncate if needed.
854 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
855 doesn't work. (Additionally add a new main config option to configure the
862 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
863 side, to decode a TLS 1.3 packet capture.
865 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
866 Previously the default library behaviour applied, sending two, each in
869 JH/03 Debug output for ACL now gives the config file name and line number for
872 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
874 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
876 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
877 buffer overrun for (non-chunking) other transports.
879 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
880 TLS1.3, means that a server rejecting a client certificate is not visible
881 to the client until the first read of encrypted data (typically the
882 response to EHLO). Add detection for that case and treat it as a failed
883 TLS connection attempt, so that the normal retry-in-clear can work (if
884 suitably configured).
886 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
887 and/or domain. Found and fixed by Jason Betts.
889 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
890 configuration). If a CNAME target was not a wellformed name pattern, a
893 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
894 the OS reports them interleaved with other addresses.
896 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
897 used both for input and for a verify callout, both encrypted, SMTP
898 responses being sent by the server could be lost. This resulted in
899 dropped connections and sometimes bounces generated by a peer sending
902 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
903 string. Previously it was possible to cause undefined behaviour in a
904 library routine (usually a crash). Found by "zerons".
906 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
909 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
910 API was removed, so update to use the newer ones.
912 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
913 any timeout set, is taking a long time. Previously we would hang on to a
914 rotated logfile "forever" if the input was arriving with long gaps
915 (a previous attempt to fix addressed lack, for a long time, of initial
918 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
919 shared (NFS) environment. The length of the tempfile name is now
920 4 + 16 ("hdr.$message_exim_id") which might break on file
921 systems which restrict the file name length to lower values.
924 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
925 shared (NFS) environment.
927 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
928 did for all versions <4.90). Notably -M, -m, --invert, -I may be
931 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
932 on some platforms for bit 31.
934 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
935 to changes apparently associated with TLS1.3 handling some of the APIs
936 previously used were either nonfunctional or inappropriate. Strings
937 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
938 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
939 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
940 This affects log line X= elements, the $tls_{in,out}_cipher variables,
941 and the use of specific cipher names in the encrypted= ACL condition.
943 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
945 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
946 verification result was not updated unless hosts_require_ocsp applied.
948 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
949 queue_list_requires_admin set to false, non-admin users were denied the
952 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
953 directory-of-certs mode. Previously they were advertised despite the
956 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
957 A single TCP connection by a client will now hold a TLS connection open
958 for multiple message deliveries, by default. Previously the default was to
961 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
962 default. If built with the facility, DANE will be used. The facility
963 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
965 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
966 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
967 must be defined and you must still, unless you define DISABLE_TLS, manage
968 the the include-dir and library-file requirements that go with that
969 choice. Non-TLS builds are still supported.
971 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
974 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
975 default. If the platform supports and has the facility enabled, it will
976 be requested on all coneections.
978 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
979 controlled by the build-time option SUPPORT_PIPE_CONNECT.
981 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
983 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
984 success-DSN messages. Previously the From: header was always the default
985 one for these; the option was ignored.
987 JH/28 Fix the timeout on smtp response to apply to the whole response.
988 Previously it was reset for every read, so a teergrubing peer sending
989 single bytes within the time limit could extend the connection for a
990 long time. Credit to Qualsys Security Advisory Team for the discovery.
992 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
993 delivery address, which leaked information of the results of local
994 forwarding. Change to the original envelope recipient address, per
997 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
998 requested. Previously not bounce was generated and a log entry of
999 error ignored was made.
1001 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1003 JH/32 Introduce a general tainting mechanism for values read from the input
1004 channel, and values derived from them. Refuse to expand any tainted
1005 values, to catch one form of exploit.
1007 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1008 was unused and the unexpanded text used for the test. Found and
1009 fixed by Ruben Jenster.
1011 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1012 an attempt to use a TLS library read routine dereffed a nul pointer,
1015 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1016 them in our smtp response.
1018 JH/36 Have the general router option retry_use_local_part default to true when
1019 any of the restrictive preconditions are set (to anything). Previously it
1020 was only for check_local user. The change removes one item of manual
1021 configuration which is required for proper retries when a remote router
1022 handles a subset of addresses for a domain.
1024 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1025 link count into consideration.
1027 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1028 caused the extension of big_buffer, the following lines were ignored.
1030 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1031 accordance with RFC 2308. Previously there was no expiry, so a longlived
1032 receive process (eg. due to ACL delays) versus a short SOA value could
1035 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1037 JH/39 Promote DMARC support to mainline.
1039 JH/40 Bug 2452: Add a References: header to DSNs.
1041 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1042 parameters. The relevant library call is documented as "Deprecated: This
1043 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1044 3.6.0, DH parameters are negotiated following RFC7919."
1046 HS/06 Change the default of dnssec_request_domains to "*"
1048 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1049 carried on and emitted a BDAT command, even when PIPELINING was not
1052 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1053 buffer was used for the filename, resulting in a trap when tainted
1054 arguments (eg. $domain) were used.
1056 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1057 recommended to avoid a possible server-load attack. The feature can be
1058 re-enabled via the openssl_options main cofiguration option.
1060 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1061 for version 4.90 - adding a "more data" boolean to the arguments.
1062 Bumped the ABI version number also, this having been missed previously;
1063 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1064 respect of usage of smtp_printf() by either local_scan code or libraries
1065 accessed via the ${dlfunc } expansion item. Both will need coding
1066 adjustment for any calls to smtp_printf() to match the new function
1067 signature; a FALSE value for the new argument is always safe.
1069 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1070 the file-offset (which the Linux syscall does, and exim expects); this
1071 resulted in an indefinite loop.
1073 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1074 to do ARC verification. The Authentication-Results: header line added
1075 by the configuration then had no ARC item.
1077 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1078 an incorrect mode was used for reading the result, resulting in it being
1085 JH/01 Remove code calling the customisable local_scan function, unless a new
1086 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1088 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1089 non-signal-safe functions being used.
1091 JH/03 Bug 2269: When presented with a received message having a stupidly large
1092 number of DKIM-Signature headers, disable DKIM verification to avoid
1093 a resource-consumption attack. The limit is set at twenty.
1095 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1096 report of oldest_pass in ${authres } in consequence, and separate out
1097 some descriptions of reasons for verification fail.
1099 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1100 files in the spool were present and unlocked. A queue-runner could spot
1101 them, resulting in a duplicate delivery. Fix that by doing the unlock
1102 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1103 add more error-checking on spoolfile handling while that code is being
1106 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1107 No known attacks, no CVE, this is defensive hardening.
1109 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1110 a queue-runner could start a delivery while other operations were ongoing.
1111 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1112 Found and investigated by Tim Stewart. Fix by using the open message data
1113 file handle rather than opening another, and not locally closing it (which
1114 releases a lock) for that case, while creating the temporary .eml format
1115 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1117 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1118 $sender_verify_failure/$recipient_verify_failure to "random".
1120 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1123 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1124 Previously this would segfault.
1126 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1129 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1130 like zero, since the resolver should be doing this for us, But we need one
1131 as a CNAME but no MX presence gets the CNAME returned; we need to check
1132 that doesn't point to an MX to declare it "no MX returned" rather than
1133 "error, loop". A new main option is added so the older capability of
1134 following some limited number of chain links is maintained.
1136 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1138 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1139 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1140 now-deprecated earlier definitions used only specified the range up to TLS
1141 1.2 (in the older-version library docs).
1143 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1145 JH/15 Rework TLS client-side context management. Stop using a global, and
1146 explicitly pass a context around. This enables future use of TLS for
1147 connections to service-daemons (eg. malware scanning) while a client smtp
1148 connection is using TLS; with cutthrough connections this is quite likely.
1150 JH/16 Fix ARC verification to do AS checks in reverse order.
1152 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1154 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1155 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1156 Previously the "utf8" would be re-prepended for every additional message.
1158 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1159 Previously thery were accepted, resulting in issues when attempting to
1160 forward messages to a non-supporting MTA.
1162 PP/02 Let -n work with printing macros too, not just options.
1164 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1165 one parent address was copied, and bogus data was used at delivery-logging
1166 time. Either a crash (after delivery) or bogus log data could result.
1167 Discovery and analysis by Tim Stewart.
1169 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1170 Previously if the string ended mid-character, we did not insert the
1171 promised '?' replacement.
1173 PP/04 Documentation: current string operators work on bytes, not codepoints.
1175 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1176 should pack well giving a smaller memory footprint so better caching and
1177 therefore performance. Group the declarations where this can't be done so
1178 that the byte-sized flag variables are not interspersed among pointer
1179 variables, giving a better chance of good packing by the compiler.
1181 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1182 non-null, to avoid issues with sites running BATV. Previously reports were
1183 sent with an empty envelope sender so looked like bounces.
1185 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1186 The ignore_error flag wasn't being returned from the filter subprocess so
1187 was not set for later routers. Investigation and fix by Matthias Kurz.
1189 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1190 and a msg:complete for the whole, when a message is manually removed using
1191 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1193 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1194 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1195 hope that is portable enough.
1197 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1198 requiring a known-CA anchor certificate; make it now rely entirely on the
1199 TLSA as an anchor. Checking the name on the leaf cert against the name
1200 on the A-record for the host is still done for TA (but not for EE mode).
1202 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1203 included in delivery lines for non-proxied connections, when compiled with
1204 SUPPORT_SOCKS and running with proxy logging enabled.
1206 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1207 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1208 move the existing event to fire before the normal logging of message
1209 failure so that custom logging is bracketed by normal logging.
1211 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1212 msg:fail:internal event. Developement by Matthias Kurz.
1214 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1215 far too small for todays use of crypto signatures stored there. Go all
1216 the way to the max DNS message size of 64kB, even though this might be
1217 overmuch for IOT constrained device use.
1219 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1220 copy a string over itself. The library routine is documented as not
1221 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1223 JH/32 For main options check_spool_space and check_inode_space, where the
1224 platform supports 64b integers, support more than the previous 2^31 kB
1225 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1226 the previous G, M, k.
1228 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1229 $authenticated_fail_id variable on authentication failure. Previously
1232 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1233 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1234 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1235 GNUTLS_SEC_PARAM_MEDIUM.
1237 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1238 side. Previously we would continue as if no SNI had been received.
1240 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1241 "<" character, which should be a list-separator specification, we walked
1242 off past the nul-terimation.
1244 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1245 causes) even when the retry time is not yet met. Previously they were
1246 not, meaning that when (say) an account was over-quota and temp-rejecting,
1247 and multiple senders' messages were queued, only one sender would get
1248 notified on each configured delay_warning cycle.
1250 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1252 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1253 cipher-suites, an error can be left on the stack even for a succeeding
1254 accept; this results in impossible error messages when a later operation
1257 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1258 return error codes indicating retry. Under TLS1.3 this becomes required.
1260 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1261 it only wrote the new authenticators, resulting in a lack of tracking of
1262 peer changes of ESMTP extensions until the next cache flush.
1264 JH/41 Fix the loop reading a message header line to check for integer overflow,
1265 and more-often against header_maxsize. Previously a crafted message could
1266 induce a crash of the recive process; now the message is cleanly rejected.
1268 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1269 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1275 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1276 When redis_servers is set to a list of > 1 element, and the Redis servers
1277 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1278 case of MOVED into a DEFER case instead, thus moving the query onto the
1279 next server in the list. For a cluster of N elements, all N servers must
1280 be defined in redis_servers.
1282 GF/02 Catch and remove uninitialized value warning in exiqsumm
1283 Check for existence of @ARGV before looking at $ARGV[0]
1285 JH/01 Replace the store_release() internal interface with store_newblock(),
1286 which internalises the check required to safely use the old one, plus
1287 the allocate and data copy operations duplicated in both (!) of the
1288 extant use locations.
1290 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1291 modifier. This matches the restriction on the commandline.
1293 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1294 Previously only the last row was returned.
1296 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1297 we assumed that tags in the header were well-formed, and parsed the
1298 element content after inspecting only the first char of the tag.
1299 Assumptions at that stage could crash the receive process on malformed
1302 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1303 While running the DKIM ACL we operate on the Permanent memory pool so that
1304 variables created with "set" persist to the DATA ACL. Also (at any time)
1305 DNS lookups that fail create cache records using the Permanent pool. But
1306 expansions release any allocations made on the current pool - so a dnsdb
1307 lookup expansion done in the DKIM ACL releases the memory used for the
1308 DNS negative-cache, and bad things result. Solution is to switch to the
1309 Main pool for expansions.
1310 While we're in that code, add checks on the DNS cache during store_reset,
1311 active in the testsuite.
1312 Problem spotted, and debugging aided, by Wolfgang Breyha.
1314 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1315 When none of the hosts presented to a transport match an already-open
1316 connection, close it and proceed with the list. Previously we would
1317 queue the message. Spotted by Lena with Yahoo, probably involving
1320 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1321 Previously a spurious "250 OK id=" response was appended to the proper
1324 JH/08 The "support for" informational output now, which built with Content
1325 Scanning support, has a line for the malware scanner interfaces compiled
1326 in. Interface can be individually included or not at build time.
1328 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1329 by the template makefile "src/EDITME". The "STREAM" support for an older
1330 ClamAV interface method is removed.
1332 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1333 rows affected is given instead).
1335 JH/11 The runtime Berkeley DB library version is now additionally output by
1336 "exim -d -bV". Previously only the compile-time version was shown.
1338 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1339 SMTP connection. Previously, when one had more recipients than the
1340 first, an abortive onward connection was made. Move to full support for
1341 multiple onward connections in sequence, handling cutthrough connection
1342 for all multi-message initiating connections.
1344 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1345 routers. Previously, a multi-recipient message would fail to match the
1346 onward-connection opened for the first recipient, and cause its closure.
1348 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1349 a timeout on read on a GnuTLS initiating connection, resulting in the
1350 initiating connection being dropped. This mattered most when the callout
1351 was marked defer_ok. Fix to keep the two timeout-detection methods
1354 JH/15 Relax results from ACL control request to enable cutthrough, in
1355 unsupported situations, from error to silently (except under debug)
1356 ignoring. This covers use with PRDR, frozen messages, queue-only and
1359 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1361 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1362 metadata, resulting in a crash in free().
1364 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1365 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1366 Broken also in d185889f4, with init system revamp.
1368 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1369 Previously we abruptly closed the connection after reading a malware-
1370 found indication; now we go on to read the "scan ok" response line,
1373 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1374 ACL. Previously, a crash would result.
1376 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1377 macro text after a replacement (previously it was only once per line) and
1378 by skipping builtin macros when searching for an uppercase lead character.
1380 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1381 for the build is renamed.
1383 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1384 was allocated for every new TLS startup, meaning one per message. Fix
1385 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1387 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1388 reported the original. Fix to report (as far as possible) the ACL
1389 result replacing the original.
1391 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1392 OpenSSL. Certificate information is loaded for every new TLS startup,
1393 and the resources needed to be freed.
1395 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1397 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1400 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1401 DATA response info to the (existing) per-recipient response info for
1402 the "C=" log element. It can have useful tracking info from the
1403 destination system. Patch from Simon Arlott.
1405 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1406 length value. Previously this would segfault.
1408 HS/02 Support Avast multiline protoocol, this allows passing flags to
1409 newer versions of the scanner.
1411 JH/28 Ensure that variables possibly set during message acceptance are marked
1412 dead before release of memory in the daemon loop. This stops complaints
1413 about them when the debug_store option is enabled. Discovered specifically
1414 for sender_rate_period, but applies to a whole set of variables.
1415 Do the same for the queue-runner and queue-list loops, for variables set
1416 from spool message files. Do the same for the SMTP per-message loop, for
1417 certain variables indirectly set in ACL operations.
1419 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1420 as a multi-recipient message from a mailinglist manager). The coding had
1421 an arbitrary cutoff number of characters while checking for more input;
1422 enforced by writing a NUL into the buffer. This corrupted long / fast
1423 input. The problem was exposed more widely when more pipelineing of SMTP
1424 responses was introduced, and one Exim system was feeding another.
1425 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1426 receiving system, and refused recipients seen by the sending system
1427 (propating to people being dropped from mailing lists).
1428 Discovered and pinpointed by David Carter.
1430 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1431 replaced by the ${authresults } expansion.
1433 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1435 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1436 allows proper process termination in container environments.
1438 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1439 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1441 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1442 and "err_perm", deprecated since 4.83 when the RFC-defined words
1443 "temperror" and "permerror" were introduced.
1445 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1446 transport-filters or DKIM-signing. The restriction was lost in the
1447 consolidation of verify-callout and delivery SMTP handling.
1448 Extend the restriction to also cover ARC-signing.
1450 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1451 in defer=pass mode supply a 450 to the initiator. Previously the message
1454 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1455 tls_require_ciphers is used as before.
1457 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1458 "pass_unscanned". Only tmpfails from the scanner are written to
1459 the paniclog, as they may require admin intervention (permission
1460 denied, license issues). Other scanner errors (like decompression
1461 bombs) do not cause a paniclog entry.
1463 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1464 Previously it was possible to log spurious information in receive log
1467 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1468 triggered odd behaviour from Outlook Express clients.
1470 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1473 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1474 since the IETF WG has not yet settled on that versus the original
1475 "bare" representation.
1477 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1478 Previously the millisecond value corrupted the output.
1479 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1480 corrupted the output.
1486 JH/01 Rework error string handling in TLS interface so that the caller in
1487 more cases is responsible for logging. This permits library-sourced
1488 string to be attached to addresses during delivery, and collapses
1489 pairs of long lines into single ones.
1491 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1492 during configuration. Wildcards are allowed and expanded.
1494 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1495 This permits better logging.
1497 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1498 do not close it down and have the child transport start it up again on
1499 the passed-on TCP connection. Instead, proxy the child (and any
1500 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1501 affected: the continued delivery log lines do not have any DNSSEC, TLS
1502 Certificate or OCSP information. TLS cipher information is still logged.
1504 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1505 identical IP addresses on different listening ports. Will also affect
1508 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1509 add noisy ifdef guards to special-case this sillyness.
1510 Patch from Bernd Kuhls.
1512 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1513 than 255 are no longer allowed.
1515 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1516 Disable the session-cache too, which might reduce our load. Since we
1517 currrectly use a new context for every connection, both as server and
1518 client, there is no benefit for these.
1519 GnuTLS appears to not support tickets server-side by default (we don't
1520 call gnutls_session_ticket_enable_server()) but client side is enabled
1521 by default on recent versions (3.1.3 +) unless the PFS priority string
1524 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1525 <https://reproducible-builds.org/specs/source-date-epoch/>.
1527 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1528 the check for any unsuccessful recipients did not notice the limit, and
1529 erroneously found still-pending ones.
1531 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1532 MSG_MORE. Only in-clear (not on TLS connections).
1534 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1535 transport-filter is involved we can buffer the headers in memory for
1536 creating the signature, and read the spool data file once for the
1537 signature and again for transmission.
1539 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1540 4.77 as the kernel support then wasn't solid, having issues in 64bit
1541 mode. Now, it's been long enough. Add support for FreeBSD also.
1543 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1544 case where the routing stage had gathered several addresses to send to
1545 a host before calling the transport for the first, we previously failed
1546 to close down TLS in the old transport process before passing the TCP
1547 connection to the new process. The new one sent a STARTTLS command
1548 which naturally failed, giving a failed delivery and bloating the retry
1549 database. Investigation and fix prototype from Wolfgang Breyha.
1551 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1552 false-negatives in the check that the sender had not preempted a response
1553 or prompt from Exim (running as a server), due to that code's lack of
1554 awareness of the SMTP input buffering.
1556 PP/04 Add commandline_checks_require_admin option.
1557 Exim drops privileges sanely, various checks such as -be aren't a
1558 security problem, as long as you trust local users with access to their
1559 own account. When invoked by services which pass untrusted data to
1560 Exim, this might be an issue. Set this option in main configuration
1561 AND make fixes to the calling application, such as using `--` to stop
1564 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1565 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1566 responses to those, into a single TLS record each way (this usually means
1567 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1570 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1571 affects you only if you're dancing at the edge of the param size limits.
1572 If you are, and this message makes sense to you, then: raise the
1573 configured limit or use OpenSSL 1.1. Nothing we can do for older
1576 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1577 cmdline element to get the documented default one. Previously it was
1580 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1581 are unsuable for non-message-specific reasons - eg. connection timeout,
1582 banner-time rejection.
1584 JH/16 Fix logging of delivery remote port, when specified by router, under
1587 PP/06 Repair manualroute's ability to take options in any order, even if one
1588 is the name of a transport.
1591 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1593 JH/17 Change the list-building routines interface to use the expanding-string
1594 triplet model, for better allocation and copying behaviour.
1596 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1597 Previously it was constructed the first time a possibly-matching string
1598 was met in the configuration file input during startup; now it is done
1601 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1602 compatible one, to avoid the (poorly documented) possibility of a config
1603 file in the working directory redirecting the DB files, possibly correpting
1604 some existing file. CVE-2017-10140 assigned for BDB.
1606 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1607 cache-hot. Previously, although the result was properly cached, the
1608 initial verify call returned a defer.
1610 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1611 the main verify for receipient in uncached-mode.
1613 JH/22 Retire historical build files to an "unsupported" subdir. These are
1614 defined as "ones for which we have no current evidence of testing".
1616 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1617 if present. Previously it was ignored.
1619 JH/24 Start using specified-initialisers in C structure init coding. This is
1620 a C99 feature (it's 2017, so now considered safe).
1622 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1623 if was a fixed-sized field and bitmask ops via macros; it is now more
1626 PP/07 GitHub PR 56: Apply MariaDB build fix.
1627 Patch provided by Jaroslav Škarvada.
1629 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1630 during Coverity cleanups [4.87 JH/47]
1631 Diagnosis and fix provided by Michael Fischer v. Mollard.
1633 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1634 the right size to place the terminating semicolon on its own folded
1635 line, the header hash was calculated to an incorrect value thanks to
1636 the (relaxed) space the fold became.
1638 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1639 and confused the parent.
1641 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1642 which could crash as a result. This could lead to undeliverable messages.
1644 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1647 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1648 matters on fast-turnover and PID-randomising systems, which were getting
1649 out-of-order delivery.
1651 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1652 a possibly-overlapping copy. The symptom was that "Remote host closed
1653 connection in response to HELO" was logged instead of the actual 4xx
1656 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1657 Previously only that bufferd was discarded, resulting in SYMTP command
1660 JH/32 DKIM: when a message has multiple signatures matching an identity given
1661 in dkim_verify_signers, run the dkim acl once for each. Previously only
1662 one run was done. Bug 2189.
1664 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1665 "panic the current process" to "deliberately defer". The panic log is
1666 still written with the problem list name; the mail and reject logs now
1667 get a temp-reject line for the message that was being handled, saying
1668 something like "domains check lookup or other defer". The SMTP 451
1669 message is still "Temporary local problem".
1671 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1672 A crafted sequence of BDAT commands could result in in-use memory beeing
1673 freed. CVE-2017-16943.
1675 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1676 from SMTP input. Previously it was always done; now only done for DATA
1677 and not BDAT commands. CVE-2017-16944.
1679 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1680 to the message (such as an overlong header line). Previously this was
1681 not done and we did not exit BDAT mode. Followon from the previous item
1682 though a different problem.
1688 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1689 than -2003 did; needs libidn2 in addition to libidn.
1691 JH/02 The path option on a pipe transport is now expanded before use.
1693 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1694 Patch provided by "Björn", documentation fix added too.
1696 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1697 missing a wire-to-host endian conversion.
1699 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1700 close after a BDAT command line could be taken as a following command,
1701 giving a synch failure. Fix by only checking for synch immediately
1702 before acknowledging the chunk.
1704 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1705 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1706 macro. Patches provided by Josh Soref.
1708 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1709 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1710 by IANA as a service extension. However, John Klensin suggests that we
1713 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1714 the dkim code may be unix-mode line endings rather than smtp wire-format
1715 CRLF, so prepend a CR to any bare LF.
1717 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1718 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1720 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1721 the first were themselves being wrongly included in the feed into dkim
1722 processing; with most chunk sizes in use this resulted in an incorrect
1723 body hash calculated value.
1725 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1726 DKIM signature block, for verification. Although advised against by
1727 standards it is specifically not ruled illegal.
1729 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1731 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1732 missing a body hash (the bh= tag).
1734 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1735 It seems that HAProxy sends the Proxy Protocol information in clear and
1736 only then does a TLS startup, so do the same.
1738 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1739 TCP connections (such as for Spamd) unless the daemon successfully set
1740 Fast Open mode on its listening sockets. This fixes breakage seen on
1741 too-old kernels or those not configured for Fast Open, at the cost of
1742 requiring both directions being enabled for TFO, and TFO never being used
1743 by non-daemon-related Exim processes.
1745 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1746 endings, at least on the first header line. Try to canonify any that get
1747 past that check, despite the cost.
1749 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1750 now limited to an arbitrary five deep, while parsing addresses with the
1751 strip_excess_angle_brackets option enabled.
1753 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1754 instead leave the unprompted TLS handshake in socket buffer for the
1755 TLS library to consume.
1757 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1759 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1761 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1762 region in one operation, for speed, and this leaves assigned pointers
1763 dangling. Add checks run only under the testsuite which checks all
1764 variables at a store-reset and panics on a dangling pointer; add code
1765 explicitly nulling out all the variables discovered. Fixes one known
1766 bug: a transport crash, where a dangling pointer for $sending_ip_address
1767 originally assigned in a verify callout, is re-used.
1769 PP/06 Drop '.' from @INC in various Perl scripts.
1771 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1773 PP/08 Reduce a number of compilation warnings under clang; building with
1774 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1775 should be warning-free.
1777 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1779 HS/01 Fix portability problems introduced by PP/08 for platforms where
1780 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1782 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1783 chunk. This allows us to accept broken chunked messages. We need a more
1784 general solution here.
1786 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1787 already-broken messages in the queue.
1789 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1791 JH/19 Fix reference counting bug in routing-generated-address tracking.
1797 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1798 supports it and a size is available (ie. the sending peer gave us one).
1800 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1801 years of being deprecated). The replacements are the ACLs
1802 acl_smtp_mime and acl_not_smtp_mime.
1804 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1805 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1806 or even an in-clear connection were permitted. Now, if the host lookup
1807 was dnssec and dane was requested then the host is only used if the
1808 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1809 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1810 if one fails this test.
1811 This means that a poorly-configured remote DNS will make it incommunicado;
1812 but it protects against a DNS-interception attack on it.
1814 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1815 non-noisy when a race steals the message being considered.
1817 JH/05 If main configuration option tls_certificate is unset, generate a
1818 self-signed certificate for inbound TLS connections.
1820 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1821 in rewrites and routers.
1823 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1824 and logged a warning sing 4.83; now they are a configuration file error.
1826 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1827 (lacking @domain). Apply the same qualification processing as RCPT.
1829 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1831 JH/10 Support ${sha256:} applied to a string (as well as the previous
1834 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1835 a cutthrough deliver is pending, as we always want to make a connection.
1836 This also avoids re-routing the message when later placing the cutthrough
1837 connection after a verify cache hit.
1838 Do not update it with the verify result either.
1840 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1841 when routing results in more than one destination address.
1843 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1844 signing (which inhibits the cutthrough capability). Previously only
1845 the presence of an option was tested; now an expansion evaluating as
1846 empty is permissible (obviously it should depend only on data available
1847 when the cutthrough connection is made).
1849 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1850 the relevant preceding SMTP command did not note the pipelining mode.
1852 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1853 Previously they were not counted.
1855 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1856 as one having no matching records. Previously we deferred the message
1857 that needed the lookup.
1859 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1860 distinguished as "(=".
1862 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1863 for missing MX records. Previously it only worked for missing A records.
1865 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1867 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1868 after the data-go-ahead and data-ack. Patch from Jason Betts.
1870 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1871 even for a "none" policy. Patch from Tony Meyer.
1873 JH/22 Fix continued use of a connection for further deliveries. If a port was
1874 specified by a router, it must also match for the delivery to be
1877 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1878 When one of the recipients of a message was unsuitable for the connection
1879 (has no matching addresses), we lost track of needing to mark it
1880 deferred. As a result mail would be lost.
1882 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1884 JH/25 Decoding ACL controls is now done using a binary search; the source code
1885 takes up less space and should be simpler to maintain. Merge the ACL
1886 condition decode tables also, with similar effect.
1888 JH/26 Fix problem with one_time used on a redirect router which returned the
1889 parent address unchanged. A retry would see the parent address marked as
1890 delivered, so not attempt the (identical) child. As a result mail would
1893 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1894 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1895 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1898 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1899 Main config options check_{log,spool}_{inodes,space} are now
1900 100 inodes, 10MB unless set otherwise in the configuration.
1902 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1903 Previously it only applied to the main-section connection policy
1906 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1908 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1909 by me. Added RFC7919 DH primes as an alternative.
1911 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1912 are not in the system include path.
1914 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1915 GnuTLS, when a session startup failed (eg because the client disconnected)
1916 Exim did stdio operations after fclose. This was exposed by a recent
1917 change which nulled out the file handle after the fclose.
1919 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1920 signed directly by the cert-signing cert, rather than an intermediate
1921 OCSP-signing cert. This is the model used by LetsEncrypt.
1923 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1925 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1926 an incoming connection.
1928 HS/02 Bug 1802: Do not half-close the connection after sending a request
1931 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1932 fallback to "prime256v1".
1934 JH/34 SECURITY: Use proper copy of DATA command in error message.
1935 Could leak key material. Remotely exploitable. CVE-2016-9963.
1941 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1942 and 3.4.4 - once the server is enabled to respond to an OCSP request
1943 it does even when not requested, resulting in a stapling non-aware
1944 client dropping the TLS connection.
1946 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1947 support variable-length bit vectors. No functional change.
1949 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1950 The I= interface field on outgoing lines is now after the H= remote
1951 host field, same as incoming lines. There is a separate
1952 outgoing_interface log selector which allows you to disable the
1955 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1956 If not running log_selector +smtp_connection the mainlog would be held
1957 open indefinitely after a "too many connections" event, including to a
1958 deleted file after a log rotate. Leave the per net connection logging
1959 leaving it open for efficiency as that will be quickly detected by the
1960 check on the next write.
1962 HS/01 Bug 1671: Fix post transport crash.
1963 Processing the wait-<transport> messages could crash the delivery
1964 process if the message IDs didn't exist for some reason. When
1965 using 'split_spool_directory=yes' the construction of the spool
1966 file name failed already, exposing the same netto behaviour.
1968 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1969 mime_regex ACL conditions.
1971 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1972 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1973 to HELO, local diagnostic string.
1975 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1976 log line to debug. Even when configured with a tls authenticator many
1977 client connections are expected to not authenticate in this way, so
1978 an authenticate fail is not an error.
1980 HS/02 Add the Exim version string to the process info. This way exiwhat
1981 gives some more detail about the running daemon.
1983 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1984 matter for fast-change records such as DNSBLs.
1986 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1987 retry record, even if constant. There may be multiple transports with
1988 different interface settings and the retry behaviour needs to be kept
1991 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1993 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1995 JH/10 Bug 840: fix log_defer_output option of pipe transport
1997 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1998 hosts_randomize. This matters a lot when combined with mua_wrapper.
2000 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2001 ${quote_pgsql:<string>} operator.
2003 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2005 JH/14 Change header file name for freeradius-client. Relevant if compiling
2006 with Radius support; from the Gentoo tree and checked under Fedora.
2008 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2010 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2011 option transport_filter, meaning no filtering.
2013 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2015 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2016 defaults to "*" (all hosts). The variable is now available when not built
2017 with TLS, default unset, mainly to enable keeping the testsuite sane.
2018 If a server certificate is not supplied (via tls_certificate) an error is
2019 logged, and clients will find TLS connections fail on startup. Presumably
2020 they will retry in-clear.
2021 Packagers of Exim are strongly encouraged to create a server certificate
2022 at installation time.
2024 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2025 with the $config_file variable.
2027 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2028 in transport context, after the attempt, and per-recipient. The latter type
2029 is per host attempted. The event data is the error message, and the errno
2030 information encodes the lookup type (A vs. MX) used for the (first) host,
2031 and the trailing two digits of the smtp 4xx response.
2033 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2034 to write to mainlog (or rejectlog, paniclog) in the window between file
2035 creation and permissions/ownership being changed. Particularly affects
2036 installations where exicyclog is run as root, rather than exim user;
2037 result is that the running daemon panics and dies.
2039 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2041 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2042 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2043 "pri" and "weight". Note that the previous implicit priority given by the
2044 list order is no longer honoured.
2046 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2047 for DKIM processing.
2049 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2050 by defining SUPPORT_SOCKS.
2052 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2053 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2054 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2055 variables are renamed to proxy_{local,external}_{address,port}.
2057 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2058 for a build by defining SUPPORT_I18N
2060 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2061 of the query string, and make ${quote_redis:} do that quoting.
2063 JH/29 Move Events support from Experimental to mainline, enabled by default
2064 and removable for a build by defining DISABLE_EVENT.
2066 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2068 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2069 cached by the daemon.
2071 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2072 by defining LOOKUP_REDIS. The libhiredis library is required.
2074 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2075 keys are given for lookup.
2077 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2078 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2079 only supported when built with TLS support. The PolarSSL SHA routines
2080 are still used when the TLS library is too old for convenient support.
2082 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2083 openssl_options), for security. OpenSSL forces this from version 1.1.0
2084 server-side so match that on older versions.
2086 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2087 allocation for $value could be released as the expansion processing
2088 concluded, but leaving the global pointer active for it.
2090 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2091 and to use the domains and local_parts ACL conditions.
2093 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2094 incorrectly not doubled on cutthrough transmission, hence seen as a
2095 body-termination at the receiving system - resulting in truncated mails.
2096 Commonly the sender saw a TCP-level error, and retransmitted the message
2097 via the normal store-and-forward channel. This could result in duplicates
2098 received - but deduplicating mailstores were liable to retain only the
2099 initial truncated version.
2101 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2103 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2105 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2106 we're in there, support oversigning also; bug 1309.
2108 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2110 HS/04 Add support for keep_environment and add_environment options.
2112 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2113 either intentional arithmetic overflow during PRNG, or testing config-
2116 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2117 delivery resulted in actual delivery. Cancel cutthrough before DATA
2120 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2121 rejects a recipient: pass the reject to the originator.
2123 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2124 Many were false-positives and ignorable, but it's worth fixing the
2127 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2128 for the new environment-manipulation done at startup. Move the routines
2129 from being local to tls.c to being global via the os.c file.
2131 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2132 an extract embedded as result-arg for a map, the first arg for extract
2133 is unavailable so we cannot tell if this is a numbered or keyed
2134 extraction. Accept either.
2140 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2143 JH/02 The smtp transport option "multi_domain" is now expanded.
2145 JH/03 The smtp transport now requests PRDR by default, if the server offers
2148 JH/04 Certificate name checking on server certificates, when exim is a client,
2149 is now done by default. The transport option tls_verify_cert_hostnames
2150 can be used to disable this per-host. The build option
2151 EXPERIMENTAL_CERTNAMES is withdrawn.
2153 JH/05 The value of the tls_verify_certificates smtp transport and main options
2154 default to the word "system" to access the system default CA bundle.
2155 For GnuTLS, only version 3.0.20 or later.
2157 JH/06 Verification of the server certificate for a TLS connection is now tried
2158 (but not required) by default. The verification status is now logged by
2159 default, for both outbound TLS and client-certificate supplying inbound
2162 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2165 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2166 Status Notification (bounce) messages are now MIME format per RFC 3464.
2167 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2168 under the control of the dsn_advertise_hosts option, and routers may
2169 have a dsn_lasthop option.
2171 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2172 default, modifiable by a malware= option. The list separator for
2173 the options can now be changed in the usual way. Bug 68.
2175 JH/10 The smtp_receive_timeout main option is now expanded before use.
2177 JH/11 The incoming_interface log option now also enables logging of the
2178 local interface on delivery outgoing connections.
2180 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2181 if the interface and destination host and port all match.
2183 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2186 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2187 Patch from Andrew Lewis.
2189 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2190 now supports optional time-restrictions, weighting, and priority
2191 modifiers per server. Patch originally by <rommer@active.by>.
2193 JH/16 The spamd_address main option now supports a mixed list of local
2194 and remote servers. Remote servers can be IPv6 addresses, and
2195 specify a port-range.
2197 JH/17 Bug 68: The spamd_address main option now supports an optional
2198 timeout value per server.
2200 JH/18 Bug 1581: Router and transport options headers_add/remove can
2201 now have the list separator specified.
2203 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2206 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2209 JH/21 Support for the A6 type of dns record is withdrawn.
2211 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2212 rather than the verbs used.
2214 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2215 from 255 to 1024 chars.
2217 JH/24 Verification callouts now attempt to use TLS by default.
2219 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2220 are generic router options now. The defaults didn't change.
2222 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2223 Original patch from Alexander Shikoff, worked over by JH.
2225 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2226 files if ZCAT_COMMAND is not executable.
2228 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2230 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2232 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2233 Normally benign, it bites when the pair was led to by a CNAME;
2234 modern usage is to not canonicalize the domain to a CNAME target
2235 (and we were inconsistent anyway for A-only vs AAAA+A).
2237 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2239 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2240 when evaluating $sender_host_dnssec.
2242 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2243 $sender_helo_dnssec variable.
2245 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2247 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2249 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2251 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2252 documented as working, but never had. Support all but $spam_report.
2254 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2255 added for tls authenticator.
2257 HS/03 Add perl_taintmode main config option
2263 TL/01 When running the test suite, the README says that variables such as
2264 no_msglog_check are global and can be placed anywhere in a specific
2265 test's script, however it was observed that placement needed to be near
2266 the beginning for it to behave that way. Changed the runtest perl
2267 script to read through the entire script once to detect and set these
2268 variables, reset to the beginning of the script, and then run through
2269 the script parsing/test process like normal.
2271 TL/02 The BSD's have an arc4random API. One of the functions to induce
2272 adding randomness was arc4random_stir(), but it has been removed in
2273 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2274 function when detected.
2276 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2277 cause callback expansion.
2279 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2280 syntax errors in an expansion can be treated as a string instead of
2281 logging or causing an error, due to the internal use of bool_lax
2282 instead of bool when processing it.
2284 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2285 server certificates when making smtp deliveries.
2287 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2289 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2291 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2293 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2294 Merged patch from Sebastian Wiedenroth.
2296 JH/05 Fix results-pipe from transport process. Several recipients, combined
2297 with certificate use, exposed issues where response data items split
2298 over buffer boundaries were not parsed properly. This eventually
2299 resulted in duplicates being sent. This issue only became common enough
2300 to notice due to the introduction of connection certificate information,
2301 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2303 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2304 size buffer was used, resulting in syntax errors when an expansion
2307 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2308 version 3.3.6 or later.
2310 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2311 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2312 both become "event_action", the variables become $event_name, $event_data
2313 and $event_defer_errno. There is a new variable $verify_mode, usable in
2314 routers, transports and related events. The tls:cert event is now also
2315 raised for inbound connections, if the main configuration event_action
2318 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2319 early OCSP support, but no stapling (appears to be less than 1.0.0).
2321 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2322 server certificate names available under the smtp transport option
2323 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2326 JH/10 Time-related extraction expansions from certificates now use the main
2327 option "timezone" setting for output formatting, and are consistent
2328 between OpenSSL and GnuTLS compilations. Bug 1541.
2330 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2331 encoded parameter in the incoming message. Bug 1558.
2333 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2334 include certificate info, eximon was claiming there were spoolfile
2337 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2339 JH/14 Log delivery-related information more consistently, using the sequence
2340 "H=<name> [<ip>]" wherever possible.
2342 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2343 are problematic for Debian distribution, omit them from the release
2346 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2348 JH/16 Fix string representation of time values on 64bit time_t architectures.
2351 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2352 output list separator was used.
2357 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2358 checkers that were complaining about end of non-void function with no
2361 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2362 This was a regression introduced in 4.83 by another bugfix.
2364 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2366 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2367 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2373 TF/01 Correctly close the server side of TLS when forking for delivery.
2375 When a message was received over SMTP with TLS, Exim failed to clear up
2376 the incoming connection properly after forking off the child process to
2377 deliver the message. In some situations the subsequent outgoing
2378 delivery connection happened to have the same fd number as the incoming
2379 connection previously had. Exim would try to use TLS and fail, logging
2380 a "Bad file descriptor" error.
2382 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2383 utilities have not been installed.
2385 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2386 temporary space as the ACL may create new global variables.
2388 TL/01 LDAP support uses per connection or global context settings, depending
2389 upon the detected version of the libraries at build time.
2391 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2392 to extract and use the src ip:port in logging and expansions as if it
2393 were a direct connection from the outside internet. PPv2 support was
2394 updated based on HAProxy spec change in May 2014.
2396 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2398 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2399 Properly escape header and check for NULL return.
2401 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2404 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2406 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2407 characters in header names, implemented as a verify condition.
2408 Contributed by Michael Fischer v. Mollard.
2410 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2411 results permerror and temperror. Previous values are deprecated but
2412 still accepted. In a future release, err_perm and err_temp will be
2413 completely removed, which will be a backward incompatibility if the
2414 ACL tests for either of these two old results. Patch contributed by
2415 user bes-internal on the mailing list.
2417 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2419 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2420 selectors, in both main and reject logs.
2422 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2425 JH/07 Add malware type "sock" for talking to simple daemon.
2427 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2429 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2430 routers/transports under cutthrough routing.
2432 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2433 numbers. Touch up "bool" conditional to keep the same definition.
2435 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2437 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2439 JH/12 Expand items in router/transport headers_add or headers_remove lists
2440 individually rather than the list as a whole. Bug 1452.
2442 Required for reasonable handling of multiple headers_ options when
2443 they may be empty; requires that headers_remove items with embedded
2444 colons must have them doubled (or the list-separator changed).
2446 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2447 view the policy declared in the DMARC record. Currently, $dmarc_status
2448 is a combined value of both the record presence and the result of the
2451 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2453 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2454 dnslookup router and the smtp transport (applying to the forward
2457 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2458 of ldap servers used for a specific lookup. Patch provided by Heiko
2461 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2462 New variable $lookup_dnssec_authenticated for observability.
2464 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2465 Patch submitted by Lars Timman.
2467 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2469 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2470 Requires trusted mode and valid format message id, aborts otherwise.
2471 Patch contributed by Heiko Schlichting.
2473 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2474 certextract with support for various fields. Bug 1358.
2476 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2477 is requested by default, modifiable by smtp transport option
2480 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2481 operate on certificate variables to give certificate fingerprints
2482 Also new ${sha256:cert_variable}.
2484 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2486 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2487 Christian Aistleitner.
2489 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2491 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2492 file. Patch from Wolfgang Breyha.
2494 JH/25 Expand the coverage of the delivery $host and $host_address to
2495 client authenticators run in verify callout. Bug 1476.
2497 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2498 align with daemon_smtp_ports. Bug 72.
2500 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2501 support and error reporting did not work properly.
2503 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2504 and is readable. Patch from Andrew Colin Kissa.
2506 TL/14 Enhance documentation of ${run expansion and how it parses the
2507 commandline after expansion, particularly in the case when an
2508 unquoted variable expansion results in an empty value.
2510 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2512 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2513 by renaming away from it. Addresses GH issue 15, reported by
2516 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2518 TL/15 SECURITY: prevent double expansion in math comparison functions
2519 (can expand unsanitized data). Not remotely exploitable.
2526 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2528 PP/02 Make -n do something, by making it not do something.
2529 When combined with -bP, the name of an option is not output.
2531 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2534 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2535 $sender_host_name and config options to manage this, and basic check
2538 PP/05 DSCP support for outbound connections and control modifier for inbound.
2540 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2541 (Only plugin which currently uses this is kerberos4, which nobody should
2542 be using, but we should make it available and other future plugins might
2543 conceivably use it, even though it would break NAT; stuff *should* be
2544 using channel bindings instead).
2546 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2547 name; added for Sendmail compatibility; requires admin caller.
2548 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2549 just ignore it); requires trusted caller.
2550 Also parse but ignore: -Ac -Am -X<logfile>
2553 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2555 TL/02 Add +smtp_confirmation as a default logging option.
2557 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2558 Patch by Magnus Holmgren from 2007-02-20.
2560 TL/04 Bugzilla 1281 - Spec typo.
2561 Bugzilla 1283 - Spec typo.
2562 Bugzilla 1290 - Spec grammar fixes.
2564 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2566 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2568 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2569 mailing list by by Dmitry Isaikin.
2571 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2573 JH/02 Support "G" suffix to numbers in ${if comparisons.
2575 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2577 NM/01 Bugzilla 1197 - Spec typo
2578 Bugzilla 1196 - Spec examples corrections
2580 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2582 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2583 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2586 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2587 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2589 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2590 "acl {{name}{arg}...}", and optional args on acl condition
2593 JH/05 Permit multiple router/transport headers_add/remove lines.
2595 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2597 JH/07 Avoid using a waiting database for a single-message-only transport.
2598 Performance patch from Paul Fisher. Bugzilla 1262.
2600 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2603 JH/09 Add $headers_added variable, with content from use of ACL modifier
2604 add_header (but not yet added to the message). Bugzilla 199.
2606 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2607 Pulled from Bugzilla 817 by Wolfgang Breyha.
2609 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2611 (nb: this is the same fix as in Exim 4.80.1)
2613 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2616 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2619 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2621 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2622 advertise SMTP AUTH mechanism to us, instead of a generic
2623 protocol violation error. Also, make Exim more robust to bad
2624 data from the Dovecot auth socket.
2626 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2628 When a queue runner is handling a message, Exim first routes the
2629 recipient addresses, during which it prunes them based on the retry
2630 hints database. After that it attempts to deliver the message to
2631 any remaining recipients. It then updates the hints database using
2634 So if a recipient address works intermittently, it can get repeatedly
2635 deferred at routing time. The retry hints record remains fresh so the
2636 address never reaches the final cutoff time.
2638 This is a fairly common occurrence when a user is bumping up against
2639 their storage quota. Exim had some logic in its local delivery code
2640 to deal with this. However it did not apply to per-recipient defers
2641 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2643 This change adds a proper retry rule check during routing so that the
2644 final cutoff time is checked against the message's age. We only do
2645 this check if there is an address retry record and there is not a
2646 domain retry record; this implies that previous attempts to handle
2647 the address had the retry_use_local_parts option turned on. We use
2648 this as an approximation for the destination being like a local
2649 delivery, as in LMTP.
2651 I suspect this new check makes the old local delivery cutoff check
2652 redundant, but I have not verified this so I left the code in place.
2654 TF/02 Correct gecos expansion when From: is a prefix of the username.
2656 Test 0254 submits a message to Exim with the header
2660 When I ran the test suite under the user fanf2, Exim expanded
2661 the header to contain my full name, whereas it should have added
2662 a Resent-Sender: header. It erroneously treats any prefix of the
2663 username as equal to the username.
2665 This change corrects that bug.
2667 GF/01 DCC debug and logging tidyup
2668 Error conditions log to paniclog rather than rejectlog.
2669 Debug lines prefixed by "DCC: " to remove any ambiguity.
2671 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2673 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2674 Bug spotted by Jeremy Harris; was flawed since initial commit.
2675 Would have resulted in OCSP responses post-SNI triggering an Exim
2676 NULL dereference and crash.
2678 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2680 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2681 Bug detection, analysis and fix by Samuel Thibault.
2682 Bugzilla 1331, Debian bug #698092.
2684 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2686 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2687 Server implementation by Todd Lyons, client by JH.
2688 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2689 config variable "prdr_enable" controls whether the server
2690 advertises the facility. If the client requests PRDR a new
2691 acl_data_smtp_prdr ACL is called once for each recipient, after
2692 the body content is received and before the acl_smtp_data ACL.
2693 The client is controlled by both of: a hosts_try_prdr option
2694 on the smtp transport, and the server advertisement.
2695 Default client logging of deliveries and rejections involving
2696 PRDR are flagged with the string "PRDR".
2698 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2699 fclose(). Diagnosis by Todd Lyons.
2701 PP/17 Update configure.default to handle IPv6 localhost better.
2702 Patch by Alain Williams (plus minor tweaks).
2705 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2706 This is now consistent with GnuTLS, and is now documented: the
2707 previous undocumented portable approach to treating the option as
2708 unset was to force an expansion failure. That still works, and
2709 an empty string is now equivalent.
2711 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2712 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2713 not performing validation itself.
2715 PP/20 Added force_command boolean option to pipe transport.
2716 Patch from Nick Koston, of cPanel Inc.
2718 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2721 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2723 PP/21 Fix eximon continuous updating with timestamped log-files.
2724 Broken in a format-string cleanup in 4.80, missed when I repaired the
2725 other false fix of the same issue.
2726 Report and fix from Heiko Schlichting.
2729 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2730 Report from Prashanth Katuri.
2732 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2733 It's SecureTransport, so affects any MacOS clients which use the
2734 system-integrated TLS libraries, including email clients.
2736 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2737 using a MIME ACL for non-SMTP local injection.
2738 Report and assistance in diagnosis by Warren Baker.
2740 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2742 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2744 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2745 last id that failed so it may be referenced in subsequent ACL's.
2747 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2750 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2751 ldap library initialization, allowing self-signed CA's to be
2752 used. Also properly sets require_cert option later in code by
2753 using NULL (global ldap config) instead of ldap handle (per
2754 session). Bug diagnosis and testing by alxgomz.
2756 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2757 the src/util/ subdirectory.
2759 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2760 renamed to Transport Post Delivery Action by Jeremy Harris, as
2763 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2764 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2765 redis_servers = needs to be configured which will be used by the redis
2766 lookup. Patch from Warren Baker, of The Packet Hub.
2768 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2770 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2771 hostname or reverse DNS when processing a host list. Used suggestions
2772 from multiple comments on this bug.
2774 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2776 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2777 Missed a few lines, added it to make the runtest require no keyboard
2780 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2781 contains upper case chars. Make router use caseful_local_part.
2783 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2784 support when GnuTLS has been built with p11-kit.
2790 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2792 This, or similar/improved, will also be change PP/11 of 4.82.
2798 PP/01 Handle short writes when writing local log-files.
2799 In practice, only affects FreeBSD (8 onwards).
2800 Bugzilla 1053, with thanks to Dmitry Isaikin.
2802 NM/01 Bugzilla 949 - Documentation tweak
2804 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2807 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2809 PP/02 Implemented gsasl authenticator.
2811 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2813 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2814 `pkg-config foo` for cflags/libs.
2816 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2817 with rest of GSASL and with heimdal_gssapi.
2819 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2820 `pkg-config foo` for cflags/libs for the TLS implementation.
2822 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2823 properties get this fed in as external SSF. A number of robustness
2824 and debugging improvements to the cyrus_sasl authenticator.
2826 PP/08 cyrus_sasl server now expands the server_realm option.
2828 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2829 Patch by Jeremy Harris.
2831 PP/10 Added dbmjz lookup type.
2833 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2835 PP/12 MAIL args handles TAB as well as SP, for better interop with
2836 non-compliant senders.
2837 Analysis and variant patch by Todd Lyons.
2839 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2840 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2841 Patch from Dirk Mueller <dmueller@suse.com>
2843 PP/13 tls_peerdn now print-escaped for spool files.
2844 Observed some $tls_peerdn in wild which contained \n, which resulted
2845 in spool file corruption.
2847 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2848 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2849 or write after TLS renegotiation, which otherwise led to messages
2852 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2853 as a tracking header (ie: a signed header comes before the signature).
2854 Patch from Wolfgang Breyha.
2856 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2857 comma-sep list; embedded commas doubled.
2859 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2861 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2863 Report and patch from Dmitry Banschikov.
2865 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2866 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2867 failures. We appear to now support TLS1.1+ with Exim.
2869 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2870 lets Exim select keys and certificates based upon TLS SNI from client.
2871 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2872 before an outbound SMTP session. New log_selector, +tls_sni.
2874 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2875 NULL dereference. Report and patch from Alun Jones.
2877 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2878 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2879 Not seeing resolver debug output on NetBSD, but suspect this is a
2880 resolver implementation change.
2882 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2883 Left warnings. Added "eximon gdb" invocation mode.
2885 PP/21 Defaulting "accept_8bitmime" to true, not false.
2887 PP/22 Added -bw for inetd wait mode support.
2889 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2890 locate the relevant includes and libraries. Made this the default.
2892 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2893 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2895 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2896 This may cause build issues on older platforms.
2898 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2899 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2900 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2901 Added SNI support via GnuTLS too.
2902 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2904 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2906 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2907 Applied second patch from Janne, implementing suggestion to default
2908 multiple-strings-in-record handling to match SPF spec.
2910 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2912 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2913 read-only, out of scope).
2914 Patch from Wolfgang Breyha, report from Stuart Northfield.
2916 PP/29 Fix three issues highlighted by clang analyser static analysis.
2917 Only crash-plausible issue would require the Cambridge-specific
2918 iplookup router and a misconfiguration.
2919 Report from Marcin Mirosław.
2921 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2923 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2924 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2925 As part of this, removing so much warning spew let me fix some minor
2926 real issues in debug logging.
2928 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2929 assignment on my part. Fixed.
2931 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2932 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2933 Janne Snabb (who went above and beyond: thank you).
2935 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2936 string otherwise requires a connection and a bunch more work and it's
2937 relatively easy to get wrong. Should also expose TLS library linkage
2940 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2941 64-bit ${eval} (JH/03).
2943 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2944 GNU libc to support some of the 64-bit stuff, should not lead to
2945 conflicts. Defined before os.h is pulled in, so if a given platform
2946 needs to override this, it can.
2948 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2949 protection layer was required, which is not implemented.
2950 Bugzilla 1254, patch from Wolfgang Breyha.
2952 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2953 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2954 tls_dhparam take prime identifiers. Also unbreak combination of
2955 OpenSSL+DH_params+TLSSNI.
2957 PP/39 Disable SSLv2 by default in OpenSSL support.
2963 PP/01 Solaris build fix for Oracle's LDAP libraries.
2964 Bugzilla 1109, patch from Stephen Usher.
2966 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2968 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2971 TF/02 Fix a couple more cases where we did not log the error message
2972 when unlink() failed. See also change 4.74-TF/03.
2974 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2975 lock up or crash if it happened to be inside a call to libc when it
2976 got a SIGUSR1 from exiwhat.
2978 The SIGUSR1 handler appends the current process status to the process
2979 log which is later printed by exiwhat. It used to use the general
2980 purpose logging code to do this, but several functions it calls are
2981 not safe for signals.
2983 The new output code in the SIGUSR1 handler is specific to the process
2984 log, and simple enough that it's easy to inspect for signal safety.
2985 Removing some special cases also simplifies the general logging code.
2986 Removing the spurious timestamps from the process log simplifies
2989 TF/04 Improved ratelimit ACL condition.
2991 The /noupdate option has been deprecated in favour of /readonly which
2992 has clearer semantics. The /leaky, /strict, and /readonly update modes
2993 are mutually exclusive. The update mode is no longer included in the
2994 database key; it just determines when the database is updated. (This
2995 means that when you upgrade Exim will forget old rate measurements.)
2997 Exim now checks that the per_* options are used with an update mode that
2998 makes sense for the current ACL. For example, when Exim is processing a
2999 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3000 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3001 must specify per_mail/readonly. If you omit the update mode it defaults to
3002 /leaky where that makes sense (as before) or /readonly where required.
3004 The /noupdate option is now undocumented but still supported for
3005 backwards compatibility. It is equivalent to /readonly except that in
3006 ACLs where /readonly is required you may specify /leaky/noupdate or
3007 /strict/noupdate which are treated the same as /readonly.
3009 A useful new feature is the /count= option. This is a generalization
3010 of the per_byte option, so that you can measure the throughput of other
3011 aggregate values. For example, the per_byte option is now equivalent
3012 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3014 The per_rcpt option has been generalized using the /count= mechanism
3015 (though it's more complicated than the per_byte equivalence). When it is
3016 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3017 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3018 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3019 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3020 Note that using per_rcpt with a non-readonly update mode in more than
3021 one ACL will cause the recipients to be double-counted. (The per_mail
3022 and per_byte options don't have this problem.)
3024 The handling of very low rates has changed slightly. If the computed rate
3025 is less than the event's count (usually one) then this event is the first
3026 after a long gap. In this case the rate is set to the same as this event's
3027 count, so that the first message of a spam run is counted properly.
3029 The major new feature is a mechanism for counting the rate of unique
3030 events. The new per_addr option counts the number of different
3031 recipients that someone has sent messages to in the last time period. It
3032 behaves like per_rcpt if all the recipient addresses are different, but
3033 duplicate recipient addresses do not increase the measured rate. Like
3034 the /count= option this is a general mechanism, so the per_addr option
3035 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3036 example, measure the rate that a client uses different sender addresses
3037 with the options per_mail/unique=$sender_address. There are further
3038 details in the main documentation.
3040 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3042 TF/06 Removed a few PCRE remnants.
3044 TF/07 Automatically extract Exim's version number from tags in the git
3045 repository when doing development or release builds.
3047 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3048 Bugzilla 879. Patch from Paul Fisher.
3050 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3051 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3054 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3056 PP/05 Variable $av_failed, true if the AV scanner deferred.
3057 Bugzilla 1078. Patch from John Horne.
3059 PP/06 Stop make process more reliably on build failure.
3060 Bugzilla 1087. Patch from Heiko Schlittermann.
3062 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3063 Bugzilla 1089. Patch from Heiko Schlittermann.
3065 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3066 Bugzilla 1131. Patch from Holger Weiß.
3068 PP/09 Handle IPv6 addresses with SPF.
3069 Bugzilla 860. Patch from Wolfgang Breyha.
3071 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3073 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3076 PP/11 match_* no longer expand right-hand-side by default.
3077 New compile-time build option, EXPAND_LISTMATCH_RHS.
3078 New expansion conditions, "inlist", "inlisti".
3080 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3082 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3084 PP/14 fix log_write() format string regression from TF/03.
3085 Bugzilla 1152. Patch from Dmitry Isaikin.
3091 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3093 PP/02 Harmonised TLS library version reporting; only show if debugging.
3094 Layout now matches that introduced for other libraries in 4.74 PP/03.
3096 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3098 PP/04 New "dns_use_edns0" global option.
3100 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3103 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3104 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3106 TK/01 Updated PolarSSL code to 0.14.2.
3107 Bugzilla 1097. Patch from Andreas Metzler.
3109 PP/07 Catch divide-by-zero in ${eval:...}.
3110 Fixes bugzilla 1102.
3112 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3115 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3116 format-string attack -- SECURITY: remote arbitrary code execution.
3118 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3119 time unintentionally subject to list matching rules, letting the header
3120 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3121 arbitrary string expansion). This allowed for information disclosure.
3123 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3124 INT_MIN/-1 -- value coerced to INT_MAX.
3130 NM/01 Workaround for PCRE version dependency in version reporting
3133 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3134 This fixes portability to compilers other than gcc, notably
3135 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3137 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3138 makefiles for portability to HP-UX and POSIX correctness.
3140 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3141 Also via indented variable definition in the Makefile.
3142 (Debugging by Oliver Heesakkers).
3144 PP/02 Restore caching of spamd results with expanded spamd_address.
3145 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3147 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3148 Improves build reliability. Fix from: Frank Elsner
3150 NM/02 Fix wide character breakage in the rfc2047 coding
3151 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3153 NM/03 Allow underscore in dnslist lookups
3154 Fixes bug 1026. Patch from Graeme Fowler
3156 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3157 Code patches from Adam Ciarcinski of NetBSD.
3159 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3162 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3163 is logged, to avoid truncation. Patch from John Horne.
3165 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3166 Patch from Jakob Hirsch.
3168 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3169 SQL string expansion failure details.
3170 Patch from Andrey Oktyabrski.
3172 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3173 Patch from Simon Arlott.
3175 PP/09 New lookups functionality failed to compile on old gcc which rejects
3176 extern declarations in function scope.
3177 Patch from Oliver Fleischmann
3179 PP/10 Use sig_atomic_t for flags set from signal handlers.
3180 Check getgroups() return and improve debugging.
3181 Fixed developed for diagnosis in bug 927 (which turned out to be
3184 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3185 Patch from Mark Zealey.
3187 PP/12 Bugzilla 1056: Improved spamd server selection.
3188 Patch from Mark Zealey.
3190 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3191 Based on patch from Heiko Schlittermann.
3193 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3194 Patch from Uwe Doering, sign-off by Michael Haardt.
3196 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3197 variable declaration deep within a block. Bug and patch from
3200 PP/15 lookups-Makefile IRIX compatibility coercion.
3202 PP/16 Make DISABLE_DKIM build knob functional.
3204 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3205 Patch by Simon Arlott
3207 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3208 variable argument macros. Our copy now differs from upstream.
3214 TF/01 Failure to get a lock on a hints database can have serious
3215 consequences so log it to the panic log.
3217 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3218 controlled using the smtp_confirmation log selector.
3220 TF/03 Include the error message when we fail to unlink a spool file.
3222 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3223 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3224 for maintaining out-of-tree patches for some time.
3226 PP/01 Bugzilla 139: Documentation and portability issues.
3227 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3228 Handle per-OS dynamic-module compilation flags.
3230 PP/02 Let /dev/null have normal permissions.
3231 The 4.73 fixes were a little too stringent and complained about the
3232 permissions on /dev/null. Exempt it from some checks.
3233 Reported by Andreas M. Kirchwitz.
3235 PP/03 Report version information for many libraries, including
3236 Exim version information for dynamically loaded libraries. Created
3237 version.h, now support a version extension string for distributors
3238 who patch heavily. Dynamic module ABI change.
3240 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3241 privilege escalation vulnerability whereby the Exim run-time user
3242 can cause root to append content of the attacker's choosing to
3245 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3248 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3249 If dropping privileges for untrusted macros, we disabled normal logging
3250 on the basis that it would fail; for the Exim run-time user, this is not
3251 the case, and it resulted in successful deliveries going unlogged.
3252 Fixed. Reported by Andreas Metzler.
3258 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3259 only prepend for the Resent-* case. Fixes regression introduced in
3260 Exim 4.70 by NM/22 for Bugzilla 607.
3262 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3263 increasing numbers of administrators be bitten by this.
3265 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3267 PP/03 Bugzilla 994: added openssl_options main configuration option.
3269 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3271 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3273 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3275 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3276 without a peer certificate, leading to a segfault because of an
3277 assumption that peers always have certificates. Be a little more
3278 paranoid. Problem reported by Martin Tscholak.
3280 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3281 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3282 NB: ClamAV planning to remove STREAM in "middle of 2010".
3283 CL also introduces -bmalware, various -d+acl logging additions and
3284 more caution in buffer sizes.
3286 PP/09 Implemented reverse_ip expansion operator.
3288 PP/10 Bugzilla 937: provide a "debug" ACL control.
3290 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3292 PP/12 Bugzilla 973: Implement --version.
3294 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3296 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3298 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3300 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3301 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3302 ignore trailing whitespace.
3304 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3306 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3309 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3310 Notification from Dr Andrew Aitchison.
3312 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3313 ExtendedDetectionInfo response format.
3314 Notification from John Horne.
3316 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3319 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3320 XSL and documented dependency on system catalogs, with examples of how
3323 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3326 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3327 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3328 configuration file which is writeable by the Exim user or group.
3330 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3331 of configuration files to cover files specified with the -C option if
3332 they are going to be used with root privileges, not just the default
3335 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3336 option (effectively making it always true).
3338 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3339 files to be used while preserving root privileges.
3341 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3342 that rogue child processes cannot use them.
3344 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3345 run-time user, instead of root.
3347 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3348 Exim run-time user without dropping privileges.
3350 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3351 result string, instead of calling string_vformat() twice with the same
3354 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3355 for other users. Others should always drop root privileges if they use
3356 -C on the command line, even for a whitelisted configure file.
3358 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3360 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3366 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3367 $data_path, and $header_path variables; fixed documentation bugs and
3370 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3371 exipick to access non-standard spools, including the "frozen" queue
3374 NM/01 Bugzilla 965: Support mysql stored procedures.
3375 Patch from Alain Williams
3377 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3379 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3380 Patch from Andreas Metzler
3382 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3383 Patch from Kirill Miazine
3385 NM/05 Bugzilla 671: Added umask to procmail example.
3387 JJ/03 installed exipick 20100323.0, fixing doc bug
3389 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3390 directory. Notification and patch from Dan Rosenberg.
3392 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3394 TK/02 Improve log output when DKIM signing operation fails.
3396 MH/01 Treat the transport option dkim_domain as a colon separated
3397 list, not as a single string, and sign the message with each element,
3398 omitting multiple occurences of the same signer.
3400 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3401 Bugzilla 985, 986. Patch by Simon Arlott
3403 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3404 Patch by Simon Arlott
3406 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3407 MBX locking. Notification from Dan Rosenberg.
3413 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3415 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3417 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3419 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3421 NM/04 Bugzilla 915: Flag broken perl installation during build.
3427 TK/01 Added patch by Johannes Berg that expands the main option
3428 "spamd_address" if it starts with a dollar sign.
3430 TK/02 Write list of recipients to X-Envelope-Sender header when building
3431 the mbox-format spool file for content scanning (suggested by Jakob
3434 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3435 (http://www.dcc-servers.net/) support via dccifd. Activated by
3436 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3438 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3439 by Mark Daniel Reidel <mr@df.eu>.
3441 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3442 When building exim an external PCRE library is now needed -
3443 PCRE is a system library on the majority of modern systems.
3444 See entry on PCRE_LIBS in EDITME file.
3446 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3447 conversation. Added nologin parameter to request.
3448 Patch contributed by Kirill Miazine.
3450 TF/01 Do not log submission mode rewrites if they do not change the address.
3452 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3454 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3455 log files in place. Contributed by Roberto Lima.
3457 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3459 TF/03 Bugzilla 615: When checking the local_parts router precondition
3460 after a local_part_suffix or local_part_prefix option, Exim now
3461 does not use the address's named list lookup cache, since this
3462 contains cached lookups for the whole local part.
3464 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3465 Robert Millan. Documentation is in experimental-spec.txt.
3467 TF/04 Bugzilla 668: Fix parallel build (make -j).
3469 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3471 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3472 Patch provided by Jan Srzednicki.
3474 TF/05 Leading white space used to be stripped from $spam_report which
3475 wrecked the formatting. Now it is preserved.
3477 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3478 that they are available at delivery time.
3480 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3482 TF/08 TLS error reporting now respects the incoming_interface and
3483 incoming_port log selectors.
3485 TF/09 Produce a more useful error message if an SMTP transport's hosts
3486 setting expands to an empty string.
3488 NM/06 Bugzilla 744: EXPN did not work under TLS.
3489 Patch provided by Phil Pennock.
3491 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3492 Patch provided by Richard Godbee.
3494 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3495 acl_smtp_notquit, added index entry.
3497 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3498 Patch provided by Eugene Bujak.
3500 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3501 accept(). Patch provided by Maxim Dounin.
3503 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3504 Patch provided by Phil Pennock.
3506 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3508 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3509 Patch provided by Brad "anomie" Jorsch.
3511 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3512 Patch provided by Dean Brooks.
3514 TK/05 Add native DKIM support (does not depend on external libraries).
3516 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3517 Patch provided by Graeme Fowler.
3519 NM/16 Bugzilla 851: Documentation example syntax fix.
3521 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3523 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3526 NM/19 Bugzilla 745: TLS version reporting.
3527 Patch provided by Phil Pennock.
3529 NM/20 Bugzilla 167: bool: condition support.
3530 Patch provided by Phil Pennock.
3532 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3533 clients. Patch provided by Phil Pennock.
3535 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3536 Patch provided by Brad "anomie" Jorsch.
3538 NM/23 Bugzilla 687: Fix misparses in eximstats.
3539 Patch provided by Heiko Schlittermann.
3541 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3542 Patch provided by Heiko Schlittermann.
3544 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3545 plus update to original patch.
3547 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3549 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3550 Patch provided by David Brownlee.
3552 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3554 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3556 NM/30 Bugzilla 888: TLS documentation bugfixes.
3558 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3560 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3561 Unlike the original bugzilla I have changed all shell scripts in src tree.
3563 NM/33 Bugzilla 898: Transport filter timeout fix.
3564 Patch by Todd Rinaldo.
3566 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3567 Patch by Serge Demonchaux.
3569 NM/35 Bugzilla 39: Base64 decode bug fixes.
3570 Patch by Jakob Hirsch.
3572 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3574 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3576 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3578 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3584 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3585 ALT-N's libdkim that I have put here:
3586 http://duncanthrax.net/exim-experimental/
3588 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3589 were called 'true' and it seems that C99 defines that as a reserved
3590 keyword to be used with 'bool' variable types. That means you could
3591 not include C99-style headers which use bools without triggering
3592 build errors in sieve.c.
3594 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3595 as mailq or other aliases. Changed the --help handling significantly
3596 to do whats expected. exim_usage() emits usage/help information.
3598 SC/01 Added the -bylocaldomain option to eximstats.
3600 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3602 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3604 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3610 PH/01 Another patch from the Sieve maintainer.
3612 PH/02 When an IPv6 address is converted to a string for single-key lookup
3613 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3614 dots are used instead of colons so that keys in lsearch files need not
3615 contain colons. This was done some time before quoting was made available
3616 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3617 (notated using the quote facility) so as to distinguish them from IPv4
3618 keys. This meant that lookups for IP addresses in host lists did not work
3619 for iplsearch lookups.
3621 This has been fixed by arranging for IPv6 addresses to be expressed with
3622 colons if the lookup type is iplsearch. This is not incompatible, because
3623 previously such lookups could never work.
3625 The situation is now rather anomalous, since one *can* have colons in
3626 ordinary lsearch keys. However, making the change in all cases is
3627 incompatible and would probably break a number of configurations.
3629 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3632 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3633 conversion specification without a maximum field width, thereby enabling
3634 a rogue spamd server to cause a buffer overflow. While nobody in their
3635 right mind would setup Exim to query an untrusted spamd server, an
3636 attacker that gains access to a server running spamd could potentially
3637 exploit this vulnerability to run arbitrary code as the Exim user.
3639 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3640 $primary_hostname instead of what libspf2 thinks the hosts name is.
3642 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3643 a directory entry by the name of the lookup key. Previously, if a
3644 symlink pointed to a non-existing file or a file in a directory that
3645 Exim lacked permissions to read, a lookup for a key matching that
3646 symlink would fail. Now it is enough that a matching directory entry
3647 exists, symlink or not. (Bugzilla 503.)
3649 PH/03 The body_linecount and body_zerocount variables are now exported in the
3652 PH/04 Added the $dnslist_matched variable.
3654 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3655 This means they are set thereafter only if the connection becomes
3658 PH/06 Added the client_condition to authenticators so that some can be skipped
3659 by clients under certain conditions.
3661 PH/07 The error message for a badly-placed control=no_multiline_responses left
3662 "_responses" off the end of the name.
3664 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3666 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3667 (without spaces) instead of just copying the configuration text.
3669 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3671 PH/11 Added $max_received_linelength.
3673 PH/12 Added +ignore_defer and +include_defer to host lists.
3675 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3676 way in which PCRE > 7.0 is built.
3678 PH/14 Implemented queue_only_load_latch.
3680 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3681 MAIL command. The effect was to mangle the value on 64-bit systems.
3683 PH/16 Another patch from the Sieve maintainer.
3685 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3687 PH/18 If a system quota error occurred while trying to create the file for
3688 a maildir delivery, the message "Mailbox is full" was not appended to the
3689 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3690 only to a quota excession during the actual writing of the file.
3692 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3693 characters?) which causes problems in log lines. The DN values are now
3694 passed through string_printing() before being added to log lines.
3696 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3697 and InterBase are left for another time.)
3699 PH/21 Added message_body_newlines option.
3701 PH/22 Guard against possible overflow in moan_check_errorcopy().
3703 PH/23 POSIX allows open() to be a macro; guard against that.
3705 PH/24 If the recipient of an error message contained an @ in the local part
3706 (suitably quoted, of course), incorrect values were put in $domain and
3707 $local_part during the evaluation of errors_copy.
3713 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3714 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3717 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3718 issue a MAIL command.
3720 PH/02 In an ACL statement such as
3722 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3724 if a client was not listed at all, or was listed with a value other than
3725 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3726 the condition was not true (as it should be), so access was not denied.
3727 The bug was that the ! inversion was incorrectly passed on to the second
3728 item. This has been fixed.
3730 PH/03 Added additional dnslists conditions == and =& which are different from
3731 = and & when the dns lookup returns more than one IP address.
3733 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3734 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3736 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3737 FSYNC, which compiles an option called disable_fsync that allows for
3738 bypassing fsync(). The documentation is heavily laced with warnings.
3740 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3742 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3743 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3744 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3745 including adding "make clean"; (3) Added -fPIC when compiling the test
3746 dynamically loaded module, to get rid of a warning.
3748 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3749 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3750 = 0s. The bug is otherwise harmless.
3752 PH/07 There was a bug in the dovecot authenticator such that the value of
3753 $auth1 could be overwritten, and so not correctly preserved, after a
3754 successful authentication. This usually meant that the value preserved by
3755 the server_setid option was incorrect.
3757 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3759 PH/09 Installed PCRE release 7.0.
3761 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3762 run for batched SMTP input. It is now run at the start of every message
3763 in the batch. While fixing this I discovered that the process information
3764 (output by running exiwhat) was not always getting set for -bs and -bS
3765 input. This is fixed, and it now also says "batched" for BSMTP.
3767 PH/11 Added control=no_pipelining.
3769 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3770 patch, slightly modified), and move the expansion of helo_data till after
3771 the connection is made in the smtp transport (so it can use these
3774 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3776 PH/14 Added log_selector = +pid.
3778 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3780 PH/16 Add ${if forany and ${if forall.
3782 PH/17 Added dsn_from option to vary the From: line in DSNs.
3784 PH/18 Flush SMTP output before performing a callout, unless control =
3785 no_callout_flush is set.
3787 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3788 was true (the default) a successful delivery failed to delete the retry
3789 item, thus causing premature timeout of the address. The bug is now
3792 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3794 PH/21 Long custom messages for fakedefer and fakereject are now split up
3795 into multiline responses in the same way that messages for "deny" and
3796 other ACL rejections are.
3798 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3799 with slight modification.
3801 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3802 draft, changing the syntax and factoring some duplicate code".
3804 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3805 for deliveries of the second and subsequent messages over the same SMTP
3808 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3809 ${reduce, with only minor "tidies".
3811 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3813 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3814 expansion side effects.
3816 PH/27 When a message times out after an over-quota error from an Exim-imposed
3817 quota, the bounce message says "mailbox is full". This message was not
3818 being given when it was a system quota that was exceeded. It now should
3821 MH/03 Made $recipients available in local_scan(). local_scan() already has
3822 better access to the recipient list through recipients_list[], but
3823 $recipients can be useful in postmaster-provided expansion strings.
3825 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3826 in the case of a MAIL command with additional options following the
3827 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3828 were accidentally chopped off.
3830 PH/29 SMTP synchronization checks are implemented when a command is read -
3831 there is a check that no more input is waiting when there shouldn't be
3832 any. However, for some commands, a delay in an ACL can mean that it is
3833 some time before the response is written. In this time, more input might
3834 arrive, invalidly. So now there are extra checks after an ACL has run for
3835 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3836 pipelining has not been advertised.
3838 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3840 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3841 returned in the SMTP response when smtp_return_error_details was false.
3842 This has been fixed.
3844 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3845 instead of the C I/O that was originally supplied, because problems were
3846 reported on Solaris.
3848 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3849 Exim which did not show up earlier: it was assuming that a call to
3850 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3851 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3852 was a macro that became an assignment, so it seemed to work. This has
3853 changed to a proper function call with a void return, hence the compile
3854 error. Exim's code has been fixed.
3856 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3859 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3861 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3863 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3864 because it turns out to be too big or there is a timeout) there is no
3865 "Completed" line in the log. When some messages of this type were
3866 selected by exigrep, they were listed as "not completed". Others were
3867 picked up by some special patterns. I have improved the selection
3868 criteria to be more general.
3870 PH/38 The host_find_failed option in the manualroute router can now be set
3871 to "ignore", to completely ignore a host whose IP address cannot be
3872 found. If all hosts are ignored, the behaviour is controlled by the new
3873 host_all_ignored option.
3875 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3876 homing or because of multiple MX records with /mx) generated more than
3877 one IP address, and the following item turned out to be the local host,
3878 all the secondary addresses of the first item were incorrectly removed
3879 from the list, along with the local host and any following hosts (which
3880 is what is supposed to happen).
3882 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3883 whoever called Exim into the -H file. In the case of the daemon it was
3884 behaving confusingly. When first started, it used values for whoever
3885 started the daemon, but after a SIGHUP it used the Exim user (because it
3886 calls itself on a restart). I have changed the code so that it now always
3889 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3890 message are rejected with the same error (e.g. no authentication or bad
3891 sender address), and a DATA command is nevertheless sent (as can happen
3892 with PIPELINING or a stupid MUA), the error message that was given to the
3893 RCPT commands is included in the rejection of the DATA command. This is
3894 intended to be helpful for MUAs that show only the final error to their
3897 PH/42 Another patch from the Sieve maintainer.
3899 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3900 Eximstats - Fixed some broken HTML links and added missing column headers
3902 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3903 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3905 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3907 PH/43 Yet another patch from the Sieve maintainer.
3909 PH/44 I found a way to check for a TCP/IP connection going away before sending
3910 the response to the final '.' that terminates a message, but only in the
3911 case where the client has not sent further data following the '.'
3912 (unfortunately, this is allowed). However, in many cases there won't be
3913 any further data because there won't be any more messages to send. A call
3914 to select() can be used: if it shows that the input is "ready", there is
3915 either input waiting, or the socket has been closed. An attempt to read
3916 the next input character can distinguish the two cases. Previously, Exim
3917 would have sent an OK response which the client would never have see.
3918 This could lead to message repetition. This fix should cure that, at
3919 least in a lot of common cases.
3921 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3922 advertised in response to EHLO.
3928 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3929 fixed by 4.65/MH/01 (is this a record?) are fixed:
3931 (i) An empty string was always treated as zero by the numeric comparison
3932 operators. This behaviour has been restored.
3934 (ii) It is documented that the numeric comparison operators always treat
3935 their arguments as decimal numbers. This was broken in that numbers
3936 starting with 0 were being interpreted as octal.
3938 While fixing these problems I realized that there was another issue that
3939 hadn't been noticed. Values of message_size_limit (both the global option
3940 and the transport option) were treated as octal if they started with 0.
3941 The documentation was vague. These values are now always treated as
3942 decimal, and I will make that clear in the documentation.
3948 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3949 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3952 MH/01 Don't check that the operands of numeric comparison operators are
3953 integers when their expansion is in "skipping" mode (fixes bug
3954 introduced by 4.64-PH/07).
3956 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3957 child addresses, Exim now panics and dies. Previously, because the count
3958 is held in a short int, deliveries were likely to be lost. As such a
3959 large number of recipients for a single message is ridiculous
3960 (performance will be very, very poor), I have chosen to impose a limit
3961 rather than extend the field.
3967 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3968 leftover -K file (the existence of which was triggered by #402).
3969 While we were at it, introduced process PID as part of the -K
3970 filename. This should rule out race conditions when creating
3973 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3974 processing considerably. Previous code took too long for large mails,
3975 triggering a timeout which in turn triggers #401.
3977 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3978 in the DK code in transports.c. sendfile() is not really portable,
3979 hence the _LINUX specificness.
3981 TF/01 In the add_headers option to the mail command in an Exim filter,
3982 there was a bug that Exim would claim a syntax error in any
3983 header after the first one which had an odd number of characters
3986 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3987 callout verification, Exim cached a "reject" for the entire domain. This
3988 is correct for most verifications, but it is not correct for a recipient
3989 verification with use_sender or use_postmaster set, because in that case
3990 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3991 case of MAIL FROM:<> rejection from other early rejections (e.g.
3992 rejection of HELO). When verifying a recipient using a non-null MAIL
3993 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3994 Whatever the result of the callout, the value of the domain cache is
3995 left unchanged (for any other kind of callout, getting as far as trying
3996 RCPT means that the domain itself is ok).
3998 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4001 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4002 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4003 session, the daemon ignores ECONNECT errors and logs others; it now
4004 ignores EPIPE as well.
4006 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4007 (quoted-printable decoding).
4009 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4010 later the small subsequent patch to fix an introduced bug.
4012 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4014 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4016 PH/08 An error is now given if message_size_limit is specified negative.
4018 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4019 to be given (somewhat) arbitrary names.
4021 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4024 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4025 miscellaneous code fixes
4027 PH/10 Added the log_reject_target ACL modifier to specify where to log
4030 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4031 hostname. This is wrong, because it relates to the incoming message (and
4032 probably the interface on which it is arriving) and not to the outgoing
4033 callout (which could be using a different interface). This has been
4034 changed to use the value of the helo_data option from the smtp transport
4035 instead - this is what is used when a message is actually being sent. If
4036 there is no remote transport (possible with a router that sets up host
4037 addresses), $smtp_active_hostname is used.
4039 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4040 tweaks were necessary in order to get it to work (see also 21 below):
4041 (a) The code assumed that strncpy() returns a negative number on buffer
4042 overflow, which isn't the case. Replaced with Exim's string_format()
4044 (b) There were several signed/unsigned issues. I just did the minimum
4045 hacking in of casts. There is scope for a larger refactoring.
4046 (c) The code used strcasecmp() which is not a standard C function.
4047 Replaced with Exim's strcmpic() function.
4048 (d) The code set only $1; it now sets $auth1 as well.
4049 (e) A simple test gave the error "authentication client didn't specify
4050 service in request". It would seem that Dovecot has changed its
4051 interface. Fortunately there's a specification; I followed it and
4052 changed what the client sends and it appears to be working now.
4054 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4057 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4058 address A is aliased to B and C, where B exists and C does not. Without
4059 -v the output is "A verified" because verification stops after a
4060 successful redirection if more than one address is generated. However,
4061 with -v the child addresses are also verified. Exim was outputting "A
4062 failed to verify" and then showing the successful verification for C,
4063 with its parentage. It now outputs "B failed to verify", showing B's
4064 parentage before showing the successful verification of C.
4066 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4067 look up a TXT record in a specific list after matching in a combined
4070 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4071 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4072 they consult the DNS. I had assumed they would set it the way they
4073 wanted; and indeed my experiments on Linux seem to show that in some
4074 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4075 To be on the safe side, however, I have now made the interface to
4076 host_find_byname() similar to host_find_bydns(), with an argument
4077 containing the DNS resolver options. The host_find_byname() function now
4078 sets these options at its start, just as host_find_bydns() does. The smtp
4079 transport options dns_qualify_single and dns_search_parents are passed to
4080 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4081 of host_find_byname() use the default settings of RES_DEFNAMES
4082 (qualify_single) but not RES_DNSRCH (search_parents).
4084 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4085 spool_read_header() do less string testing, by means of a preliminary
4086 switch on the second character of optional "-foo" lines. (This is
4087 overdue, caused by the large number of possibilities that now exist.
4088 Originally there were few.) While I was there, I also converted the
4089 str(n)cmp tests so they don't re-test the leading "-" and the first
4090 character, in the hope this might squeeze out yet more improvement.
4092 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4093 flag allowing group syntax was set by the header_syntax check but not
4094 turned off, possible causing trouble later; (2) The flag was not being
4095 set at all for the header_verify test, causing "group"-style headers to
4096 be rejected. I have now set it in this case, and also caused header_
4097 verify to ignore an empty address taken from a group. While doing this, I
4098 came across some other cases where the code for allowing group syntax
4099 while scanning a header line wasn't quite right (mostly, not resetting
4100 the flag correctly in the right place). These bugs could have caused
4101 trouble for malformed header lines. I hope it is now all correct.
4103 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4104 with the "reply" argument non-NULL. The code, however (which originally
4105 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4106 but it didn't always do it. This confused somebody who was copying the
4107 code for some other use. I have removed all the tests.
4109 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4110 feature that was used to support insecure browsers during the U.S. crypto
4111 embargo. It requires special client support, and Exim is probably the
4112 only MTA that supported it -- and would never use it because real RSA is
4113 always available. This code has been removed, because it had the bad
4114 effect of slowing Exim down by computing (never used) parameters for the
4115 RSA_EXPORT functionality.
4117 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4118 authenticator to fail if there's a tab character in the incoming data
4119 (there should never be unless someone is messing about, as it's supposed
4120 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4121 if the connection is using TLS or if the remote IP is the same as the
4122 local IP, and the "valid-client-cert option" if a client certificate has
4125 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4126 authenticators. This can be used for authorization after authentication
4127 succeeds. (In the case of plaintext, it servers for both authentication
4130 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4131 if any retry times were supplied.
4133 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4134 connection, where there is no client IP address to check. In this
4135 situation, the verify now always succeeds.
4137 PH/25 Applied John Jetmore's -Mset patch.
4139 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4141 PH/27 In a string expansion for a processed (not raw) header when multiple
4142 headers of the same name were present, leading whitespace was being
4143 removed from all of them, but trailing whitespace was being removed only
4144 from the last one. Now trailing whitespace is removed from each header
4145 before concatenation. Completely empty headers in a concatenation (as
4146 before) are ignored.
4148 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4149 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4151 PH/29 [Removed. This was a change that I later backed out, and forgot to
4152 correct the ChangeLog entry (that I had efficiently created) before
4153 committing the later change.]
4155 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4156 address errors (4xx response to RCPT) over the same connection as other
4157 messages routed to the same hosts. Such deliveries are always "forced",
4158 so retry times are not inspected. This resulted in far too many retries
4159 for the affected addresses. The effect occurred only when there were more
4160 hosts than the hosts_max_try setting in the smtp transport when it had
4161 the 4xx errors. Those hosts that it had tried were not added to the list
4162 of hosts for which the message was waiting, so if all were tried, there
4163 was no problem. Two fixes have been applied:
4165 (i) If there are any address or message errors in an SMTP delivery, none
4166 of the hosts (tried or untried) are now added to the list of hosts
4167 for which the message is waiting, so the message should not be a
4168 candidate for sending over the same connection that was used for a
4169 successful delivery of some other message. This seems entirely
4170 reasonable: after all the message is NOT "waiting for some host".
4171 This is so "obvious" that I'm not sure why it wasn't done
4172 previously. Hope I haven't missed anything, but it can't do any
4173 harm, as the worst effect is to miss an optimization.
4175 (ii) If, despite (i), such a delivery is accidentally attempted, the
4176 routing retry time is respected, so at least it doesn't keep
4177 hammering the server.
4179 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4180 in ${readsocket because some servers need this prod.
4182 PH/32 Added some extra debug output when updating a wait-xxx database.
4184 PH/33 The hint "could be header name not terminated by colon", which has been
4185 given for certain expansion errors for a long time, was not being given
4186 for the ${if def:h_colon_omitted{... case.
4188 PH/34 The spec says: "With one important exception, whenever a domain list is
4189 being scanned, $domain contains the subject domain." There was at least
4190 one case where this was not true.
4192 PH/35 The error "getsockname() failed: connection reset by peer" was being
4193 written to the panic log as well as the main log, but it isn't really
4194 panic-worthy as it just means the connection died rather early on. I have
4195 removed the panic log writing for the ECONNRESET error when getsockname()
4198 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4199 runs only) independently of the message's sender address. This meant
4200 that, if the 4xx error was in fact related to the sender, a different
4201 message to the same recipient with a different sender could confuse
4202 things. In particular, this can happen when sending to a greylisting
4203 server, but other circumstances could also provoke similar problems.
4204 I have changed the default so that the retry time for these errors is now
4205 based a combination of the sender and recipient addresses. This change
4206 can be overridden by setting address_retry_include_sender=false in the
4209 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4210 remote server are returned as part of bounce messages. This was not
4211 happening for LMTP over a pipe (the lmtp transport), but now it is the
4212 same for both kinds of LMTP.
4214 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4215 in header lines that were in fact CNAMEs. This is no longer the case.
4217 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4218 and queue runs started by the daemon processed all messages. This has
4219 been fixed so that -R and -S can now usefully be given with -q<time>.
4221 PH/40 Import PCRE release 6.7 (fixes some bugs).
4223 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4225 PH/42 Give an error if -q is specified more than once.
4227 PH/43 Renamed the variables $interface_address and $interface_port as
4228 $received_ip_address and $received_port, to make it clear that these
4229 values apply to message reception, and not to the outgoing interface when
4230 a message is delivered. (The old names remain recognized, of course.)
4232 PH/44 There was no timeout on the connect() call when using a Unix domain
4233 socket in the ${readsocket expansion. There now is.
4235 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4236 be meaningful with "accept".
4238 SC/01 Eximstats V1.43
4239 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4241 SC/02 Eximstats V1.44
4242 Use a glob alias rather than an array ref in the generated
4243 parser. This improves both readability and performance.
4245 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4246 Collect SpamAssassin and rejection statistics.
4247 Don't display local sender or destination tables unless
4248 there is data to show.
4249 Added average volumes into the top table text output.
4251 SC/04 Eximstats V1.46
4252 Collect data on the number of addresses (recipients)
4253 as well as the number of messages.
4255 SC/05 Eximstats V1.47
4256 Added 'Message too big' to the list of mail rejection
4257 reasons (thanks to Marco Gaiarin).
4259 SC/06 Eximstats V1.48
4260 Mainlog lines which have GMT offsets and are too short to
4261 have a flag are now skipped.
4263 SC/07 Eximstats V1.49 (Alain Williams)
4264 Added the -emptyok flag.
4266 SC/08 Eximstats V1.50
4267 Fixes for obtaining the IP address from reject messages.
4269 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4270 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4271 whitespace changes from 4.64-PH/27
4273 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4276 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4277 are found, allow negative numbers in numeric criteria)
4279 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4281 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4282 to match changes made in 4.64-PH/43
4284 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4286 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4287 "domain" is actually an IP address, and force a failure. This locks out
4288 those revolvers/nameservers that support "A-for-A" lookups, in
4289 contravention of the specifications.
4291 PH/48 When a host name was looked up from an IP address, and the subsequent
4292 forward lookup of the name timed out, the host name was left in
4293 $sender_host_name, contrary to the specification.
4295 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4296 restricted to single-key lookups, Exim was not diagnosing an error if
4297 * or *@ was used with a query-style lookup.
4299 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4301 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4302 long ago, but noone interested enough thought of it. Let's just say that
4303 the "1.1" means that there are some new functions that weren't there at
4304 some point in the past.
4306 PH/51 Error processing for expansion failure of helo_data from an smtp
4307 transport during callout processing was broken.
4309 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4310 tested/used via the -bh/-bhc/-bs options.
4312 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4313 bug, fixed in subsequent PCRE releases).
4315 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4316 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4318 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4324 SC/01 Use a glob alias rather than an array ref in eximstats generated
4325 parser. This improves both readability and performance.
4327 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4328 Don't display local sender or destination tables in eximstats unless
4329 there is data to show.
4330 Added average volumes into the eximstats top table text output.
4332 SC/03 Collect data on the number of addresses (recipients) as well
4333 as the number of messages in eximstats.
4335 TF/01 Correct an error in the documentation for the redirect router. Exim
4336 does (usually) call initgroups() when daemonizing.
4338 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4339 with consistent privilege compared to when running as a daemon.
4341 TF/03 Note in the spec that $authenticated_id is not set for local
4342 submissions from trusted users.
4344 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4345 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4347 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4348 by adding some example configuration directives to the default
4349 configuration file. A little bit of work is required to uncomment the
4350 directives and define how usernames and passwords are checked, but
4351 there is now a framework to start from.
4353 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4354 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4355 without this. I don't know how relevant this is to other LDAP libraries.
4357 PH/02 Add the verb name to the "unknown ACL verb" error.
4359 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4361 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4363 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4364 directory not expanded when it should be if an expanded home directory
4365 was set for the address (which is overridden by the transport).
4367 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4370 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4371 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4372 because it is too late at that time, and has no effect.
4374 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4375 security issue with \' (bugzilla #107). I could not use the
4376 PQescapeStringConn() function, because it needs a PGconn value as one of
4379 PH/08 When testing addresses using -bt, indicate those final addresses that
4380 are duplicates that would not cause an additional delivery. At least one
4381 person was confused, thinking that -bt output corresponded to deliveries.
4382 (Suppressing duplicates isn't a good idea as you lose the information
4383 about possibly different redirections that led to the duplicates.)
4385 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4386 systems where poll() doesn't work, in particular OS X.
4388 PH/10 Added more information to debugging output for retry time not reached.
4390 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4391 operations in malware.c.
4393 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4396 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4397 syslog_duplication set false, log lines that would normally be written
4398 both the the main log and to the reject log were not written to syslog at
4401 PH/14 In the default configuration, change the use of "message" in ACL warn
4402 statements to "add_header".
4404 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4405 not followed by a command (e.g. "seen endif").
4407 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4408 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4411 PH/17 Added extra conditions to the default value of delay_warning_condition
4415 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4416 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4417 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4420 The Auto-Submitted: and various List- headers are standardised, whereas I
4421 don't think Precedence: ever was.
4423 PH/18 Refactored debugging code in route_finduser() to show more information,
4424 in particular, the error code if getpwnam() issues one.
4426 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4427 This is apparently needed in addition to the PH/07 change above to avoid
4428 any possible encoding problems.
4430 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4431 but not after initializing Perl.
4433 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4434 output them only if debugging. By default they are written stderr,
4435 apparently, which is not desirable.
4437 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4440 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4443 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4445 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4446 authenticated or an ident call has been made. Suppress the default
4447 values for $authenticated_id and $authenticated_sender (but permit -oMai
4448 and -oMas) when testing with -bh.
4450 PH/24 Re-jigged the order of the tests in the default configuration so that the
4451 tests for valid domains and recipients precede the DNS black list and CSA
4452 tests, on the grounds that those ones are more expensive.
4454 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4455 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4456 This bug exists in every version of Exim that I still have, right back to
4459 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4460 However, an attempt to turn on case-sensitivity in a regex key by
4461 including (?-i) didn't work because the subject string was already
4462 lowercased, and the effects were non-intuitive. It turns out that a
4463 one-line patch can be used to allow (?-i) to work as expected.
4469 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4470 other effects) broke the use of negated acl sub-conditions.
4472 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4475 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4476 "Deny" causes Exim to reject the incoming connection with a 554 error.
4477 Unfortunately, if there is a major crisis, such as a disk failure,
4478 tcp-wrappers gives "deny", whereas what one would like would be some
4479 kind of temporary error. A kludge has been added to help with this.
4480 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4481 554 error is used if errno is still zero or contains ENOENT (which occurs
4482 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4485 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4487 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4488 errors. Otherwise a message that provokes a temporary error (when other
4489 messages do not) can cause a whole host to time out.
4491 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4492 addresses were routed directly to files or pipes from a redirect router.
4493 File deliveries just didn't batch; pipe deliveries might have suffered
4496 PH/06 A failure to get a lock for a hints database would erroneously always say
4497 "Failed to get write lock", even when it was really a read lock.
4499 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4500 of 0600. This has been changed to use the value of the lockfile_mode
4501 option (which defaults to 0600).
4503 PH/08 Applied small patch from the Sieve maintainer.
4505 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4506 folder from quota calculations, a direct delivery into this folder messed
4507 up the contents of the maildirsize file. This was because the regex was
4508 used only to exclude .Trash (or whatever) when the size of the mailbox
4509 was calculated. There was no check that a delivery was happening into an
4510 excluded directory. This bug has been fixed by ignoring all quota
4511 processing for deliveries into excluded directories.
4513 PH/10 Added the maildirfolder_create_regex option to appendfile.
4519 PH/01 The code for finding all the local interface addresses on a FreeBSD
4520 system running IPv6 was broken. This may well have applied to all BSD
4521 systems, as well as to others that have similar system calls. The broken
4522 code found IPv4 interfaces correctly, but gave incorrect values for the
4523 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4524 that it would not match correctly against @[] and not recognize the IPv6
4527 PH/02 The ipliteral router was not recognizing addresses of the form user@
4528 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4530 PH/03 Added disable_ipv6.
4532 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4533 decoded form, because it is most often used to construct To: headers
4534 lines in autoreplies, and the decoded form may well be syntactically
4535 invalid. However, $reply_address has leading white space removed, and all
4536 newlines turned into spaces so that the autoreply transport does not
4539 PH/05 If group was specified without a user on a router, and no group or user
4540 was specified on a transport, the group from the router was ignored.
4542 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4543 for visible compile-time settings that can be used to change these
4544 numbers, for those that want even more. Backwards compatibility with old
4545 spool files has been maintained. However, going back to a previous Exim
4546 release will lost any variables that are in spool files.
4548 PH/07 Two small changes when running in the test harness: increase delay when
4549 passing a TCP/IP connection to a new process, in case the original
4550 process has to generate a bounce, and remove special handling of
4551 127.0.0.2 (sic), which is no longer necessary.
4553 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4554 be the same on different OS.
4556 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4559 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4560 whether --show-vars was specified or not
4562 JJ/02 exipick: Added support for new ACL variable spool format introduced
4565 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4566 syntactically invalid From: or Reply-to: line, and a filter used this to
4567 generate an autoreply, and therefore failed to obtain an address for the
4568 autoreply, Exim could try to deliver to a non-existent relative file
4569 name, causing unrelated and misleading errors. What now happens is that
4570 it logs this as a hard delivery error, but does not attempt to create a
4573 PH/11 The exinext utility has a -C option for testing purposes, but although
4574 the given file was scanned by exinext itself; it wasn't being passed on
4575 when Exim was called.
4577 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4578 an end-of-file indication when reading a command response.
4580 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4581 compiled. In many other places in Exim, IPv6 addresses are always
4582 recognized, so I have changed this. It also means that IPv4 domain
4583 literals of the form [IPV4:n.n.n.n] are now always recognized.
4585 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4586 used if the router is not running as root, for example, when verifying at
4587 ACL time, or when using -bh. The debugging output from this situation was
4588 non-existent - all you got was a failure to exec. I have made two
4591 (a) Failures to set uid/gid, the current directory, or a process leader
4592 in a subprocess such as that created by queryprogram now generate
4593 suitable debugging output when -d is set.
4595 (b) The queryprogram router detects when it is not running as root,
4596 outputs suitable debugging information if -d is set, and then runs
4597 the subprocess without attempting to change uid/gid.
4599 PH/15 Minor change to Makefile for building test_host (undocumented testing
4602 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4603 additional section of a DNS packet that returns MX or SRV records.
4604 Instead, it always explicitly searches for A/AAAA records. This avoids
4605 major problems that occur when a DNS server includes only records of one
4606 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4607 fixed another bug: if SRV records were looked up and the corresponding
4608 address records were *not* found in the additional section, the port
4609 values from the SRV records were lost.
4611 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4612 using the correct key (the original address) when searching the retry
4613 rules in order to find which one to use for generating the retry hint.
4615 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4616 adding the default one. Similarly, if it contains a Reply-To: header, the
4617 errors_reply_to option, if set, is not used.
4619 PH/19 When calculating a retry time, Exim used to measure the "time since
4620 failure" by looking at the "first failed" field in the retry record. Now
4621 it does not use this if it is later than than the arrival time of the
4622 message. Instead it uses the arrival time. This makes for better
4623 behaviour in cases where some deliveries succeed, thus re-setting the
4624 "first failed" field. An example is a quota failure for a huge message
4625 when small messages continue to be delivered. Without this change, the
4626 "time since failure" will always be short, possible causing more frequent
4627 delivery attempts for the huge message than are intended.
4628 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4630 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4631 $1, $2, $3) because the numerical variables can be reset during some
4632 expansion items (e.g. "match"), thereby losing the authentication data.
4634 PH/21 Make -bV show the size of off_t variables so that the test suite can
4635 decide whether to run tests for quotas > 2G.
4637 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4638 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4639 filecount value is greater than 2G or if a quota value is greater than 2G
4640 on a system where the size of off_t is not greater than 4, a panic error
4643 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4644 never match. The debug and -bh output now contains an explicit error
4645 message indicating a malformed IPv4 address or mask.
4647 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4648 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4649 PH/23 above applies.
4651 PH/25 Do not write to syslog when running in the test harness. The only
4652 occasion when this arises is a failure to open the main or panic logs
4653 (for which there is an explicit test).
4655 PH/26 Added the /no_tell option to "control=freeze".
4657 PH/27 If a host name lookup failed very early in a connection, for example, if
4658 the IP address matched host_lookup and the reverse lookup yielded a name
4659 that did not have a forward lookup, an error message of the form "no IP
4660 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4661 could be logged. Now it outputs the IP address instead of "NULL".
4663 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4664 allows the sender and the authenticated sender to be set when
4665 submitting a message from within Exim. Since child_open_exim() is
4666 documented for local_scan(), the new function should be too.
4668 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4669 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4670 results in an empty string is now treated as unset.
4672 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4674 PH/31 Added sender_verify_fail logging option.
4676 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4677 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4678 tidied the source and removed it altogether.
4680 PH/33 When a queue run was abandoned because the load average was too high, a
4681 log line was always written; now it is written only if the queue_run log
4682 selector is set. In addition, the log line for abandonment now contains
4683 information about the queue run such as the pid. This is always present
4684 in "start" and "stop" lines but was omitted from the "abandon" line.
4686 PH/34 Omit spaces between a header name and the colon in the error message that
4687 is given when verify = headers_syntax fails (if there are lots of them,
4688 the message gets confusing).
4690 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4691 names, as there are now some PTR records that contain slashes. This check
4692 is only to protect against broken name servers that fall over on strange
4693 characters, so the fact that it applies to all lookups doesn't matter.
4695 PH/36 Now that the new test suite is complete, we can remove some of the
4696 special code in Exim that was needed for the old test suite. For example,
4697 sorting DNS records because real resolvers return them in an arbitrary
4698 order. The new test suite's fake resolver always returns records in the
4701 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4702 bounces) except when queue_only is set, to avoid logging races between
4703 the different processes.
4705 PH/38 Panic-die if .include specifies a non-absolute path.
4707 PH/39 A tweak to the "H" retry rule from its user.
4709 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4710 a label. They prevented compilation on older perls.
4712 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4713 a warning to be raised on newish perls.
4715 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4716 on queue. Changes to match documented behaviour of showing count of
4717 messages matching specified criteria.
4719 PH/40 Changed the default ident timeout from 30s to 5s.
4721 PH/41 Added support for the use of login_cap features, on those BSD systems
4722 that have them, for controlling the resources used by pipe deliveries.
4724 PH/42 The content-scanning code uses fopen() to create files in which to put
4725 message data. Previously it was not paying any attention to the mode of
4726 the files. Exim runs with umask(0) because the rest of the code creates
4727 files with open(), and sets the required mode explicitly. Thus, these
4728 files were ending up world-writeable. This was not a big issue, because,
4729 being within the spool directory, they were not world-accessible. I have
4730 created a function called modefopen, which takes an additional mode
4731 argument. It sets umask(777), creates the file, chmods it to the required
4732 mode, then resets the umask. All the relevant calls to fopen() in the
4733 content scanning code have been changed to use this function.
4735 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4736 to 24 hours. This avoids potential overflow problems when processing G
4737 and H retry rules. I suspect nobody ever tinkers with this value.
4739 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4741 PH/45 When the plaintext authenticator is running as a client, the server's
4742 challenges are checked to ensure they are valid base64 strings. By
4743 default, the authentication attempt is cancelled if an invalid string is
4744 received. Setting client_ignore_invalid_base64 true ignores these errors.
4745 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4746 they are received. Thus, the responses can be made to depend on the
4747 challenges. If an invalid string is ignored, an empty string is placed in
4750 PH/46 Messages that are created by the autoreply transport now contains a
4751 References: header, in accordance with RFCs 2822 and 3834.
4753 PH/47 Added authenticated_sender_force to the smtp transport.
4755 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4757 PH/49 Installed latest patch from the Sieve maintainer.
4759 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4760 was also set, the appendfile transport was unnecessarily scanning a
4761 directory of message files (e.g. for maildir delivery) to find the count
4762 of files (along with the size), even though it did not need this
4763 information. It now does the scan only if it needs to find either the
4764 size of the count of files.
4766 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4768 PH/52 Two bugs concerned with error handling when the smtp transport is
4771 (i) Exim was not creating retry information for temporary errors given
4772 for individual recipients after the DATA command when the smtp transport
4773 was used in LMTP mode. This meant that they could be retried too
4774 frequently, and not timed out correctly.
4776 (ii) Exim was setting the flag that allows error details to be returned
4777 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4778 recipients that were returned after the DATA command.
4780 PH/53 This is related to PH/52, but is more general: for any failing address,
4781 when detailed error information was permitted to be returned to the
4782 sender, but the error was temporary, then after the final timeout, only
4783 "retry timeout exceeded" was returned. Now it returns the full error as
4784 well as "retry timeout exceeded".
4786 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4787 do this, and (what is worse) MTAs that accept it.
4789 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4790 will now be deprecated.
4792 PH/56 New os.c-cygwin from the Cygwin maintainer.
4794 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4795 formats (previously only available in exim formats via -bpr, -bpru,
4796 and -bpra. Now also available in native and exiqgrep formats)
4798 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4799 with very large, slow to parse queues
4801 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4803 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4805 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4806 responses to authentication challenges, though it was showing the
4807 challenges; (ii) I've removed the CR characters from the debug output for
4810 PH/58 Allow for the insertion of a newline as well as a space when a string
4811 is turned into more than one encoded-word during RFC 2047 encoding. The
4812 Sieve code now uses this.
4814 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4815 data_4xx, lost_connection, tls_required.
4817 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4818 message was being sent as an SMTP response.
4820 PH/61 Add -l and -k options to exicyclog.
4822 PH/62 When verifying, if an address was redirected to one new address, so that
4823 verification continued, and the new address failed or deferred after
4824 having set something in $address_data, the value of $address_data was not
4825 passed back to the ACL. This was different to the case when no
4826 redirection occurred. The value is now passed back in both cases.
4828 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4829 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4830 use login_cap.h, so on its own it isn't the distinguishing feature. The
4831 new name refers directly to the setclassresources() function.
4833 PH/65 Added configuration files for NetBSD3.
4835 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4837 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4838 is preferred over IPv4.
4840 PH/68 The bounce_return_message and bounce_return_body options were not being
4841 honoured for bounces generated during the reception of non-SMTP messages.
4842 In particular, this applied to messages rejected by the ACL. This bug has
4843 been fixed. However, if bounce_return_message is true and bounce_return_
4844 body is false, the headers that are returned for a non-SMTP message
4845 include only those that have been read before the error was detected.
4846 (In the case of an ACL rejection, they have all been read.)
4848 PH/69 The HTML version of the specification is now built in a directory called
4849 spec_html instead of spec.html, because the latter looks like a path with
4850 a MIME-type, and this confuses some software.
4852 PH/70 Catch two compiler warnings in sieve.c.
4854 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4855 function verify_get_ident() calls ip_connect() to connect a socket, but
4856 if the "connect()" function timed out, ip_connect() used to close the
4857 socket. However, verify_get_ident() also closes the socket later, and in
4858 between Exim writes to the log, which may get opened at this point. When
4859 the socket was closed in ip_connect(), the log could get the same file
4860 descriptor number as the socket. This naturally causes chaos. The fix is
4861 not to close the socket in ip_connect(); the socket should be closed by
4862 the function that creates it. There was only one place in the code where
4863 this was missing, in the iplookup router, which I don't think anybody now
4864 uses, but I've fixed it anyway.
4866 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4867 well as to direct DNS lookups. Otherwise the handling of names in host
4868 lists is inconsistent and therefore confusing.
4874 PH/01 Two changes to the default runtime configuration:
4876 (1) Move the checks for relay_from_hosts and authenticated clients from
4877 after to before the (commented out) DNS black list checks.
4879 (2) Add control=submission to the relay_from_hosts and authenticated
4880 clients checks, on the grounds that messages accepted by these
4881 statements are most likely to be submissions.
4883 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4885 (1) Generate an error if the third argument for the ${prvs expansion is
4888 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4891 (3) Reset the variables that are obtained from the first argument of
4892 ${prvscheck and used in the second argument before leaving the code,
4893 because their memory is reclaimed, so using them afterwards may do
4896 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4897 one (it's much easier than Tom thought :-).
4899 (5) Because of (4), we can now allow for the use of $prvscheck_result
4900 inside the third argument.
4902 PH/03 For some reason, the default setting of PATH when running a command from
4903 a pipe transport was just "/usr/bin". I have changed it to
4906 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4907 anything to be listed in the output from -bV.
4909 PH/05 When a filter generated an autoreply, the entire To: header line was
4910 quoted in the delivery log line, like this:
4912 => >A.N.Other <ano@some.domain> <original@ddress> ...
4914 This has been changed so that it extracts the operative address. There
4915 may be more than one such address. If so, they are comma-separated, like
4918 => >ano@some.domain,ona@other.domain <original@ddress> ...
4920 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4921 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4922 not being looked up in the rDNS to get a host name, Exim was showing the
4923 IP address twice in Received: lines, even though the IP addresses were
4924 identical. For example:
4926 Received: from [1.2.3.4] (helo=[1.2.3.4])
4928 However, if the real host name was known, it was omitting the HELO data
4929 if it matched the actual IP address. This has been tidied up so that it
4930 doesn't show the same IP address twice.
4932 PH/07 When both +timestamp and +memory debugging was on, the value given by
4933 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4934 called by the debug printing, thereby overwriting the timestamp buffer.
4935 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4937 PH/08 When the original message was included in an autoreply transport, it
4938 always said "this is a copy of the message, including all the headers",
4939 even if body_only or headers_only was set. It now gives an appropriate
4942 PH/09 Applied a patch from the Sieve maintainer which:
4944 o fixes some comments
4945 o adds the (disabled) notify extension core
4946 o adds some debug output for the result of if/elsif tests
4947 o points to the current vacation draft in the documentation
4948 and documents the missing references header update
4952 o fixes a bug in processing the envelope test (when testing
4953 multiple envelope elements, the last element determined the
4956 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4957 Electronic Mail") by including:
4959 Auto-submitted: auto-generated
4961 in the messages that it generates (bounce messages and others, such as
4962 warnings). In the case of bounce messages for non-SMTP messages, there was
4963 also a typo: it was using "Auto_submitted" (underscore instead of
4964 hyphen). Since every message generated by Exim is necessarily in response
4965 to another message, thes have all been changed to:
4967 Auto-Submitted: auto-replied
4969 in accordance with these statements in the RFC:
4971 The auto-replied keyword:
4973 - SHOULD be used on messages sent in direct response to another
4974 message by an automatic process,
4976 - MUST NOT be used on manually-generated messages,
4978 - MAY be used on Delivery Status Notifications (DSNs) and Message
4979 Disposition Notifications (MDNs),
4981 - MUST NOT be used on messages generated by automatic or periodic
4982 processes, except for messages which are automatic responses to
4985 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4986 to the default Received: header definition.
4988 PH/12 Added log selector acl_warn_skipped (default on).
4990 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4991 variables because (a) they are in the wrong storage pool and (b) even if
4992 they were copied, it wouldn't work properly because of the caching.
4994 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4995 checking when decoding. Apparently there are clients that generate
4996 overlong encoded strings. Why am I not surprised?
4998 PH/15 If the first argument of "${if match_address" was not empty, but did not
4999 contain an "@" character, Exim crashed. Now it writes a panic log message
5000 and treats the condition as false.
5002 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5004 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5005 extension "envelope-auth". The code is finished and in agreement with
5006 other implementations, but there is no documentation so far and in fact,
5007 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5008 not changing the active code.
5010 Print executed "if" and "elsif" statements when debugging is used. This
5011 helps a great deal to understand what a filter does.
5013 Document more things not specified clearly in RFC3028. I had all this
5014 sorted out, when out of a sudden new issues came to my mind. Oops."
5016 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5019 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5020 canonical form (as documented). However, after a host name lookup from
5021 the IP address, check_host() was doing a simple string comparison with
5022 addresses acquired from the DNS when checking that the found name did
5023 have the original IP as one of its addresses. Since any found IPv6
5024 addresses are likely to be in abbreviated form, the comparison could
5025 fail. Luckily, there already exists a function for doing the comparison
5026 by converting both addresses to binary, so now that is used instead of
5027 the text comparison.
5029 PH/20 There was another similar case to PH/19, when a complete host name was
5030 given in a host list; looking up its IP address could give an abbreviated
5031 form, whereas the current host's name might or might not be abbreviated.
5032 The same fix has been applied.
5038 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5039 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5042 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5043 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5045 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5047 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5048 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5049 Also, for "Auto-Submitted", treat anything other than "no" as
5050 non-personal, in accordance with RFC 3834. (Previously it treated
5051 anything starting "auto-" as non-personal.)
5053 TF/01 The control=submission/name=... option had a problem with syntax
5054 errors if the name included a slash character. The /name= option
5055 now slurps the rest of the string, so it can include any characters
5056 but it must come last in the list of options (after /sender_retain
5059 PH/05 Some modifications to the interface to the fake nameserver for the new
5067 TK/01 Added the "success_on_redirect" address verification option. See
5068 NewStuff for rationale and an example.
5070 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5072 PH/02 Patch to exigrep to allow it to work on syslog lines.
5074 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5075 fread() to skip over the body file's header line, because in Cygwin the
5076 header line is locked and is inaccessible.
5078 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5079 co-exist for some time) to make it clear that it is the Exim ID that is
5080 referenced, not the Message-ID: header line.
5082 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5083 string_format() function, because snprintf() does not exist on all
5086 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5087 ${stat: expansion item.
5089 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5090 protocol synchronization error", to keep the pedants happy.
5092 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5093 well as for IRIX systems, when gcc is being used. See the host.c source
5096 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5098 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5101 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5102 transport and to the smtp transport in LMTP mode.
5104 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5106 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5107 run a filter in a subprocess. This could lead to confusion in subsequent
5108 lookups in the parent process. There should also be a search_tidyup() at
5109 the end of the subprocess.
5111 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5112 only if the host matched helo_try_verify_hosts, which caused the
5113 verification to occur when the EHLO/HELO command was issued. The ACL just
5114 tested the remembered result. Now, if a previous verification attempt has
5115 not happened, "verify = helo" does it there and then.
5117 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5119 TK/03 Fix log output including CR from clamd.
5121 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5122 exist provoked a memory error which could cause a segfault.
5124 PH/15 Installed PCRE 6.2
5126 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5128 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5129 of the problem. Specifically, suggested +O2 rather than +O1 for the
5132 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5134 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5135 record, the port was not correctly logged when the outgoing_port log
5136 selector was set (it logged the transort's default port).
5138 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5139 fallback_hosts, and "hosts" in the smtp transport.
5141 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5142 host errors such as "Connection refused".
5144 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5145 authentication with radiusclient 0.4.9:
5147 - Error returned from rc_read_config was caught wrongly
5148 - Username/password not passed on to radius server due to wrong length.
5150 The presumption is that some radiusclient API changes for 4.51/PH/17
5151 were not taken care of correctly. The code is still untested by me (my
5152 Linux distribution still has 0.3.2 of radiusclient), but it was
5153 contributed by a Radius user.
5155 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5156 expanding the "port" option of the smtp transport.
5158 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5159 while reading a MIME header. Thanks to Tom Hughes for a patch.
5161 PH/24 Include config.h inside local_scan.h so that configuration settings are
5164 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5165 that in an ACL for RCPT (for example), you can examine exactly what was
5168 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5169 commands, but it was not correctly comparing the address with the actual
5170 client host address. Thus, it would show the EHLO address in Received:
5171 header lines when this was not necessary.
5173 PH/27 Added the % operator to ${eval:}.
5175 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5176 it should be ignoring failures (because with -C, for example, it has lost
5177 privilege). It wasn't ignoring creation failures other than "already
5180 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5183 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5184 because an input line was too long, either on its own, or by virtue of
5185 too many continuations, the temporary file was not being removed, and the
5186 return code was incorrect.
5188 PH/31 Missing "BOOL" in function definition in filtertest.c.
5190 PH/32 Applied Sieve patches from the maintainer.
5192 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5194 PH/33 Added "verify = not_blind".
5196 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5197 Local/Makefile (with some defaults set). These are used in built scripts
5198 such as exicyclog, but they have never been used in the exim_install
5199 script (though there are many overriding facilities there). I have
5200 arranged that the exim_install script now takes note of these two
5203 PH/35 Installed configuration files for Dragonfly.
5205 PH/36 When a locally submitted message by a trusted user did not contain a
5206 From: header, and the sender address was obtained from -f or from an SMTP
5207 MAIL command, and the trusted user did not use -F to supply a sender
5208 name, $originator_name was incorrectly used when constructing a From:
5209 header. Furthermore, $originator_name was used for submission mode
5210 messages from external hosts without From: headers in a similar way,
5211 which is clearly wrong.
5213 PH/37 Added control=suppress_local_fixups.
5215 PH/38 When log_selector = +received_sender was set, and the addition of the
5216 sender made the log line's construction buffer exactly full, or one byte
5217 less than full, an overflow happened when the terminating "\n" was
5220 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5221 when the result of a list match is failure because a DNS lookup failed.
5223 PH/40 RM_COMMAND is now used in the building process.
5225 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5226 the "build-* directories that it finds.
5228 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5229 address in a domain literal was a prefix of an interface address.
5231 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5232 when verifying a sender address, unless rewrite_headers is false.
5234 PH/44 Wrote a long comment about why errors_to addresses are verified as
5235 recipients, not senders.
5237 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5238 the ratelimit ACL was added.
5240 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5242 PH/46 Added extra information about PostgreSQL errors to the error string.
5244 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5245 avoiding the need to install special zones in a real server. This is
5246 backwards compatible; if it can't find the fake resolver, it drops back.
5247 Thus, both old and new test suites can be run.
5249 TF/02 Added util/ratelimit.pl
5251 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5252 clock is set back in time.
5254 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5255 Candler <B.Candler@pobox.com>.
5257 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5258 OK for addresses that are the result of redirections.
5260 PH/48 A number of further additions for the benefit of the new test suite,
5261 including a fake gethostbyname() that interfaces to the fake DNS resolver
5264 TF/06 The fix for widen_domains has also been applied to qualify_single and
5265 search_parents which are the other dnslookup options that can cause
5268 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5271 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5273 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5274 service" if it encountered an MX record with an empty target hostname.
5275 The message is now "an MX or SRV record indicated no SMTP service".
5277 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5278 if the DNS of the sending site is misconfigured. This is quite a
5279 common situation. This change restores the behaviour of treating a
5280 helo verification defer as a failure.
5282 PH/51 If self=fail was set on a router, the bounce message did not include the
5283 actual error message.
5289 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5291 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5292 command itself ended in error, the underlying message about the transport
5293 filter timeout was being overwritten with the pipe command error. Now the
5294 underlying error message should be appended to the second error message.
5296 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5298 PH/02 Reduce the amount of output that "make" produces by default. Full output
5299 can still be requested.
5301 PH/03 The warning log line about a condition test deferring for a "warn" verb
5302 was being output only once per connection, rather than after each
5303 occurrence (because it was using the same function as for successful
5304 "warn" verbs). This seems wrong, so I have changed it.
5306 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5307 it should not have, which might have caused a crash in the right
5308 circumstances, but probably never did.
5310 PH/04 Installed a modified version of Tony Finch's patch to make submission
5311 mode fix the return path as well as the Sender: header line, and to
5312 add a /name= option so that you can make the user's friendly name appear
5315 TF/03 Added the control = fakedefer ACL modifier.
5317 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5318 Mark Lowes for thorough testing.
5320 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5322 TK/03 Merged latest SRS patch from Miles Wilton.
5324 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5325 with the definition in sysexits.h (which is #included earlier).
5326 Fortunately, Exim does not actually use EX_OK. The code used to try to
5327 preserve the sysexits.h value, by assuming that macro definitions were
5328 scanned for macro replacements. I have been disabused of this notion,
5329 so now the code just undefines EX_OK before #including unistd.h.
5331 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5332 in the smtp transport. When a block could not be written in a single
5333 write() function, the timeout was being re-applied to each part-write.
5334 This seems wrong - if the receiver was accepting one byte at a time it
5335 would take for ever. The timeout is now adjusted when this happens. It
5336 doesn't have to be particularly precise.
5338 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5339 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5341 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5342 without a domain if the check to <postmaster@domain> fails.
5344 SC/01 Eximstats: added -xls and the ability to specify output files
5345 (patch written by Frank Heydlauf).
5347 SC/02 Eximstats: use FileHandles for outputting results.
5349 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5351 SC/04 Eximstats: fixed display of large numbers with -nvr option
5353 SC/05 Eximstats: fixed merging of reports with empty tables.
5355 SC/06 Eximstats: added the -include_original_destination flag
5357 SC/07 Eximstats: removed tabs and trailing whitespace.
5359 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5361 TK/06 MBOX spool code: Add real "From " MBOX separator line
5362 so the .eml file is really in mbox format (even though
5363 most programs do not really care). Patch from Alex Miller.
5365 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5366 The latter is generated from $received_to and is only set if the
5367 message has one envelope recipient. SA can use these headers,
5368 obviously out-of-the-box. Patch from Alex Miller.
5370 PH/08 The ${def test on a variable was returning false if the variable's
5371 value was "0", contrary to what the specification has always said!
5372 The result should be true unless the variable is empty.
5374 PH/09 The syntax error of a character other than { following "${if
5375 def:variable_name" (after optional whitespace) was not being diagnosed.
5376 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5377 accidental colon was present, for example, could give incorrect results.
5379 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5380 result is used (not including appendfile, where other changes are about
5383 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5384 This involved changing a lot of size variables from int to off_t. It
5385 should work with maildirs and everything.
5387 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5388 spamd dying while we are connected to it.
5390 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5393 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5394 function for BDB 4.3.
5396 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5398 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5399 the sources for PCRE have been re-arranged and more files are now
5402 PH/15 The code I had for printing potentially long long variables in PH/11
5403 above was not the best (it lost precision). The length of off_t variables
5404 is now inspected at build time, and an appropriate printing format (%ld
5405 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5406 to be "long long int" or "long int". This is needed for the internal
5407 formatting function string_vformat().
5409 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5410 the configuration file to be ":syslog", then the script "guesses" where
5411 the logs files are, rather than using the compiled in default. In our
5412 case the guess is not the same as the compiled default, so the script
5413 suddenly stopped working when I started to use syslog. The patch checks
5414 to see if log_file_path is "". If so, it attempts to read it from exim
5415 with no configuration file to get the compiled in version, before it
5416 falls back to the previous guessing code."
5418 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5419 implementing BATV in an Exim configuration. See NewStuff for the gory
5422 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5423 Makefile that are specific to HP-UX.
5425 PH/18 If the "use_postmaster" option was set for a recipient callout together
5426 with the "random" option, the postmaster address was used as the MAIL
5427 FROM address for the random test, but not for the subsequent recipient
5428 test. It is now used for both.
5430 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5431 patch removes a few documentation additions to RFC 3028, because the
5432 latest draft now contains them. It adds the new en;ascii-case comparator
5433 and a new error check for 8bit text in MIME parts. Comparator and
5434 require names are now matched exactly. I enabled the subaddress
5435 extension, but it is not well tested yet (read: it works for me)."
5437 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5438 rework some of the code of TK/09 above to avoid the hardwired use of
5439 "%lld" and "long long". Replaced the call to snprintf() with a call to
5442 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5443 records point to non-existent hosts", "retry timeout exceeded", and
5444 "retry time not reached for any host after a long failure period".
5446 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5447 experimental DomainKeys support:
5449 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5450 (2) On an error such as an illegally used "control", the wrong name for
5451 the control was given.
5453 These problems did NOT occur unless DomainKeys support was compiled.
5455 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5457 PH/24 Added ${if match_ip condition.
5459 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5460 databases so that it will be absolutely obvious if a crash occurs in the
5461 DB library. This is a regular occurrence (often caused by mis-matched
5464 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5465 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5466 picked up on a user's system that detects such things. There doesn't seem
5467 to be a gcc warning option for this - only an attribute that has to be
5468 put on the function's prototype. It seems that in Fedora Core 4 they have
5469 set this on a number of new functions. No doubt there will be more in due
5472 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5473 specify a transport. However, if an address that was verified by such a
5474 router was the subject of a callout, Exim crashed because it tried to
5475 read the rcpt_include_affixes from the non-existent transport. Now it
5476 just assumes that the setting of that option is false. This bug was
5477 introduced by 4.51/PH/31.
5479 PH/28 Changed -d+all to exclude +memory, because that information is very
5480 rarely of interest, but it makes the output a lot bigger. People tend to
5481 do -d+all out of habit.
5483 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5484 code in os-type was giving problems when libc.so lives in lib64, like on
5487 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5488 aren't the modern standard, and it seems that some systems' include files
5489 don't always have them. Exim was already checking for some of the newer
5490 ones like T_AAAA, and defining it itself. I've added checks for all the
5491 record types that Exim uses.
5493 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5494 not automatically generating a new one, as it is supposed to. This
5495 prevented TLS from working. If the file did exist, but contained invalid
5496 data, a new version was generated, as expected. It was only the case of a
5497 non-existent file that was broken.
5499 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5500 with a change in libdomainkeys > 0.64.
5502 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5503 from DNS. If the selector record carries the flag, it now has
5504 precedence over the domain-wide flag.
5506 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5508 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5509 the use of a port name that isn't defined in /etc/services) occurred, the
5510 message was deferred as in a normal delivery, and thus remained on the
5511 spool, instead of being failed because of the mua_wrapper setting. This
5512 is now fixed, and I tidied up some of the mua_wrapper messages at the
5515 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5516 the messages in a hash of arrays rather than using individual hashes.
5517 This is a bit cleaner and results in dramatic memory savings, albeit
5518 at a slight CPU cost.
5520 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5521 as requested by Marc Sherman.
5523 SC/10 Eximstats: added histograms for user specified patterns as requested
5526 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5528 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5529 fopen() in the content-scanning modules that did not already have it.
5535 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5536 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5538 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5540 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5542 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5543 to test Sieve filters that use "vacation".
5545 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5546 that changes the way the GnuTLS parameters are stored in the cache file.
5547 The new format can be generated externally. For backward compatibility,
5548 if the data in the cache doesn't make sense, Exim assumes it has read an
5549 old-format file, and it generates new data and writes a new file. This
5550 means that you can't go back to an older release without removing the
5553 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5554 work if there are any delivery delays because "one_time" forces the
5555 parent to be marked "delivered", so its unseen clone is never tried
5556 again. For this reason, Exim now forbids the simultaneous setting of
5559 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5560 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5561 entry if you want to know the details. The fix, however, neglected to
5562 consider the case when local delivery batching is involved. The test for
5563 "previously delivered" was not happening when checking to see if an
5564 address could be batched with a previous (undelivered) one; under
5565 certain circumstances this could lead to multiple deliveries to the same
5568 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5569 in its include files, and this causes problems building Exim.
5571 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5572 header_syntax) but Exim was just ignoring anything given after a slash.
5573 In particular, this caused confusion with an attempt to use "verify =
5574 reverse_host_lookup/defer_ok". An error is now given when options are
5575 supplied for verify items that do not have them. (Maybe reverse_host_
5576 lookup should have a defer_ok option, but that's a different point.)
5578 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5579 defined by RFC 821) to 2048, because there were problems with some AUTH
5580 commands, and RFC 1869 says the size should be increased for extended
5581 SMTP commands that take arguments.
5583 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5586 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5587 "unknown" error; now it says that the functionality isn't in the binary.
5589 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5590 an address' error message when a string expansion fails (syntax or
5591 whatever). Otherwise the password may appear in the log. Following change
5592 PH/42 below, there is no longer a chance of it appearing in a bounce
5595 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5597 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5598 of its addresses was ever tried. (Bugzilla bug #2.)
5600 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5601 the result incorrectly in the debug output. (It correctly added a newline
5602 to what was transported.)
5604 TF/01 Added $received_time.
5606 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5607 commented out examples of how to interface to a virus scanner and to
5608 SpamAssassin. Also added commented examples of av_scanner and
5609 spamd_address settings.
5611 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5612 and controls are allowed in which ACLs. There were a couple of minor
5613 errors. Some of the entries in the conditions table (which is a table of
5614 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5615 negation of where the condition IS allowed.
5617 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5619 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5620 header file does not have a version number, so I've had to invent a new
5621 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5622 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5623 radiusclient), but it was contributed by a Radius user.
5625 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5626 files or directories, for OpenSSL.
5628 PH/19 When an Exim process that is running as root has to create an Exim log
5629 file, it does so in a subprocess that runs as exim:exim so as to get the
5630 ownership right at creation (otherwise, other Exim processes might see
5631 the file with the wrong ownership). There was no test for failure of this
5632 fork() call, which would lead to the process getting stuck as it waited
5633 for a non-existent subprocess. Forks do occasionally fail when resources
5634 run out. I reviewed all the other calls to fork(); they all seem to check
5637 PH/20 When checking for unexpected SMTP input at connect time (before writing
5638 the banner), Exim was not dealing correctly with a non-positive return
5639 from the read() function. If the client had disconnected by this time,
5640 the result was a log entry for a synchronization error with an empty
5641 string after "input=" when read() returned zero. If read() returned -1
5642 (an event I could not check), uninitialized data bytes were printed.
5643 There were reports of junk text (parts of files, etc) appearing after
5646 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5648 PH/22 Added support for macro redefinition, and (re)definition in between
5649 driver and ACL definitions.
5651 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5652 forgetting to use the resulting value; it was using the unexpanded value.
5654 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5655 hadn't been configured. The fix is from Juergen Kreileder, who
5656 understands it better than I do:
5658 "Here's what I see happening with three configured cyrus_sasl
5659 authenticators configured (plain, login, cram-md5):
5661 On startup auth_cyrus_sasl_init() gets called for each of these.
5662 This means three calls to sasl_listmech() without a specified mech_list.
5663 => SASL tests which mechs of all available mechs actually work
5664 => three warnings about OTP not working
5665 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5667 With the patch, sasl_listmech() also gets called three times. But now
5668 SASL's mech_list option is set to the server_mech specified in the the
5669 authenticator. Or in other words, the answer from sasl_listmech()
5670 gets limited to just the mech you're testing for (which is different
5672 => the return list contains just 'plain' or 'login', 'cram-md5' or
5673 nothing depending on the value of ob->server_mech.
5675 I've just tested the patch: Authentication still works fine,
5676 unavailable mechs specified in the exim configuration are still
5677 caught, and the auth.log warnings about OTP are gone."
5679 PH/25 When debugging is enabled, the contents of the command line are added
5680 to the debugging output, even when log_selector=+arguments is not
5683 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5684 answer is "GNU", and only if the return is "GNU/something" is the answer
5687 PH/27 $acl_verify_message is now set immediately after the failure of a
5688 verification in an ACL, and so is available in subsequent modifiers. In
5689 particular, the message can be preserved by coding like this:
5691 warn !verify = sender
5692 set acl_m0 = $acl_verify_message
5694 Previously, $acl_verify_message was set only while expanding "message"
5695 and "log_message" when a very denied access.
5697 PH/28 Modified OS/os.c-Linux with
5699 -#ifndef OS_LOAD_AVERAGE
5700 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5702 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5703 nomenclature these days.)
5705 PH/29 Installed patch from the Sieve maintainer that adds the options
5706 sieve_useraddress and sieve_subaddress to the redirect router.
5708 PH/30 In these circumstances:
5709 . Two addresses routed to the same list of hosts;
5710 . First host does not offer TLS;
5711 . First host accepts first address;
5712 . First host gives temporary error to second address;
5713 . Second host offers TLS and a TLS session is established;
5714 . Second host accepts second address.
5715 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5716 and peerdn, if requested) that were in fact used only for the second
5719 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5720 attention to any local part prefix or suffix that was matched by the
5721 router that accepted the address. It now behaves in the same way as it
5722 does for delivery: the affixes are removed from the local part unless
5723 rcpt_include_affixes is set on the transport.
5725 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5726 timeout during the DATA phase of an incoming message.
5728 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5729 applied a patch sanctioned by the Sieve maintainer.
5731 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5732 the uid or gid is negative. A case of a negative gid caused this to be
5733 noticed. The fix allows for either to be negative.
5735 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5736 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5739 PH/36 The change PH/12 above was broken. Fixed it.
5741 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5742 the grounds that routing the same address twice would always produce the
5743 same answer. This might have been true once, but it is certainly no
5744 longer true now. Routing a child address may depend on the previous
5745 routing that produced that child. Some complicated redirection strategies
5746 went wrong when messages had multiple recipients, and made Exim's
5747 behaviour dependent on the order in which the addresses were given.
5749 I have moved the duplicate checking until after the routing is complete.
5750 Exim scans the addresses that are assigned to local and remote
5751 transports, and removes any duplicates. This means that more work will be
5752 done, as duplicates will always all be routed, but duplicates are
5753 presumably rare, so I don't expect this is of any significance.
5755 For deliveries to pipes, files, and autoreplies, the duplicate checking
5756 still happens during the routing process, since they are not going to be
5759 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5760 It corrects a timeout issue with spamd. This is Ian's comment: "The
5761 background is that sometimes spamd either never reads data from a
5762 connection it has accepted, or it never writes response data. The exiscan
5763 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5764 blindly assumes that writes won't block so it may never time out."
5766 PH/39 Allow G after quota size as well as K and M.
5768 PH/40 The value set for $authenticated_id in an authenticator may not contain
5769 binary zeroes or newlines because the value is written to log lines and
5770 to spool files. There was no check on this. Now the value is run through
5771 the string_printing() function so that such characters are converted to
5772 printable escape sequences.
5774 PH/41 $message_linecount is a new variable that contains the total number of
5775 lines in the message. Compare $body_linecount, which is the count for the
5778 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5779 bounce and delay warning messages, except in certain special cases, which
5782 (a) An SMTP error message from a remote host;
5783 (b) A message specified in a :fail: redirection;
5784 (c) A message specified in a "fail" command in a system filter;
5785 (d) A message specified in a FAIL return from the queryprogram router;
5786 (e) A message specified by the cannot_route_message router option.
5788 In these cases only, Exim does include the error details in bounce and
5789 warning messages. There are also a few cases where bland messages such
5790 as "unrouteable address" or "local delivery error" are given.
5792 PH/43 $value is now also set for the "else" part of a ${run expansion.
5794 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5795 being worked on, but at least Exim now implements the latest version to
5798 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5799 process to complete was treated as a delivery failure, a timeout while
5800 writing the message to the pipe was logged, but erroneously treated as a
5801 successful delivery. Such timeouts include transport filter timeouts. For
5802 consistency with the overall process timeout, these timeouts are now
5803 treated as errors, giving rise to delivery failures by default. However,
5804 there is now a new Boolean option for the pipe transport called
5805 timeout_defer, which, if set TRUE, converts the failures into defers for
5806 both kinds of timeout. A transport filter timeout is now identified in
5809 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5810 systems where "make" and "gmake" are different, calling "gmake" at top
5811 level broke things. I've arranged for the value of $(MAKE) to be passed
5812 from the Makefile to this script so that it can call the same version of
5816 A note about Exim versions 4.44 and 4.50
5817 ----------------------------------------
5819 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5820 changes of various kinds. As a consequence, a big documentation update was
5821 needed. This delayed the release for rather longer than seemed good, especially
5822 in the light of a couple of (minor) security issues. Therefore, the changes
5823 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5824 release. So 4.44 and 4.50 are in effect two different branches that both start
5827 I have left the 4.50 change log unchanged; it contains all the changes since
5828 4.43. The change log for 4.44 is below; many of its items are identical to
5829 those for 4.50. This seems to be the most sensible way to preserve the
5830 historical information.
5836 1. Minor wording change to the doc/README.SIEVE file.
5838 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5839 computation of the current number of files was incorrect.
5841 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5842 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5845 4. Give more explanation in the error message when the command for a transport
5846 filter fails to execute.
5848 5. There are several places where Exim runs a non-Exim command in a
5849 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5850 was being done only for the command run by the queryprogram router. It is
5851 now done for all such subprocesses. The other cases are: ${run, transport
5852 filters, and the commands run by the lmtp and pipe transports.
5854 6. Added CONFIGURE_GROUP build-time option.
5856 7. Some older OS have a limit of 256 on the maximum number of file
5857 descriptors. Exim was using setrlimit() to set 1000 as a large value
5858 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5859 systems. I've change it so that if it can't get 1000, it tries for 256.
5861 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5862 was an oversight, and furthermore, ever since the addition of extra
5863 controls (e.g. 4.43/32), the checks on when to allow different forms of
5864 "control" were broken. There should now be diagnostics for all cases when a
5865 control that does not make sense is encountered.
5867 9. Added the /retain_sender option to "control=submission".
5869 10. $recipients is now available in the predata ACL (oversight).
5871 11. Tidy the search cache before the fork to do a delivery from a message
5872 received from the command line. Otherwise the child will trigger a lookup
5873 failure and thereby defer the delivery if it tries to use (for example) a
5874 cached ldap connection that the parent has called unbind on.
5876 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5877 of $address_data from the recipient verification was clobbered by the
5878 sender verification.
5880 13. The value of address_data from a sender verification is now available in
5881 $sender_address_data in subsequent conditions in the ACL statement.
5883 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5885 15. Added a new option "connect=<time>" to callout options, to set a different
5888 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5889 was its contents. (It was OK if the option was not defined at all.)
5891 17. A "Completed" log line is now written for messages that are removed from
5892 the spool by the -Mrm option.
5894 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5895 information about exactly what failed.
5897 19. Added -dd to debug only the daemon process.
5899 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5900 handles timeouts, both on the server side and network timeouts. Renamed the
5901 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5903 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5904 It is now set to "smtps".
5906 22. $host_address is now set to the target address during the checking of
5907 ignore_target_hosts.
5909 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5910 being passed; this would have caused $sender_host_name to have been used if
5911 matching the list had actually called for a host name (not very likely,
5912 since this list is usually IP addresses). A host name is now passed as
5915 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5916 code that specifies a non-restarting handler (typically sigaction() in
5917 modern systems) in an attempt to fix a rare and obscure crash bug.
5919 25. Narrowed the window for a race in the daemon that could cause it to ignore
5920 SIGCHLD signals. This is not a major problem, because they are used only to
5921 wake it up if nothing else does.
5923 26. A malformed maildirsize file could cause Exim to calculate negative values
5924 for the mailbox size or file count. Odd effects could occur as a result.
5925 The maildirsize information is now recalculated if the size or filecount
5928 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5929 support for a long time. Removed HAVE_SYS_VFS_H.
5931 28. Installed the latest version of exipick from John Jetmore.
5933 29. In an address list, if the pattern was not a regular expression, an empty
5934 subject address (from a bounce message) matched only if the pattern was an
5935 empty string. Non-empty patterns were not even tested. This was the wrong
5936 because it is perfectly reasonable to use an empty address as part of a
5937 database query. An empty address is now tested by patterns that are
5938 lookups. However, all the other forms of pattern expect the subject to
5939 contain a local part and a domain, and therefore, for them, an empty
5940 address still always fails if the pattern is not itself empty.
5942 30. Exim went into a mad DNS loop when attempting to do a callout where the
5943 host was specified on an smtp transport, and looking it up yielded more
5944 than one IP address.
5946 31. Re-factored the code for checking spool and log partition space into a
5947 function that finds that data and another that does the check. The former
5948 is then used to implement four new variables: $spool_space, $log_space,
5949 $spool_inodes, and $log_inodes.
5951 32. The RFC2047 encoding function was originally intended for short strings
5952 such as real names; it was not keeping to the 75-character limit for
5953 encoded words that the RFC imposes. It now respects the limit, and
5954 generates multiple encoded words if necessary. To be on the safe side, I
5955 have increased the buffer size for the ${rfc2047: expansion operator from
5958 33. It is now permitted to omit both strings after an "if" condition; if the
5959 condition is true, the result is "true". As before, when the second string
5960 is omitted, a false condition yields an empty string. This makes it less
5961 cumbersome to write custom ACL and router conditions.
5963 34. Failure to deliver a bounce message always caused it to be frozen, even if
5964 there was an errors_to setting on the router. The errors_to setting is now
5967 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5968 canonical form (fully expanded) before being placed in
5969 $sender_host_address.
5971 36. The table in the code that translates DNS record types into text (T_A to
5972 "A" for instance) was missing entries for NS and CNAME. It is just possible
5973 that this could have caused confusion if both these types were looked up
5974 for the same domain, because the text type is used as part of Exim's
5975 per-process caching. But the chance of anyone hitting this buglet seems
5978 37. The dnsdb lookup has been extended in a number of ways.
5980 (1) There is a new type, "zns", which walks up the domain tree until it
5981 finds some nameserver records. It should be used with care.
5983 (2) There is a new type, "mxh", which is like "mx" except that it returns
5984 just the host names, not the priorities.
5986 (3) It is now possible to give a list of domains (or IP addresses) to be
5987 looked up. The behaviour when one of the lookups defers can be
5988 controlled by a keyword.
5990 (4) It is now possible to specify the separator character for use when
5991 multiple records are returned.
5993 38. The dnslists ACL condition has been extended: it is now possible to supply
5994 a list of IP addresses and/or domains to be looked up in a particular DNS
5997 39. Added log_selector=+queue_time_overall.
5999 40. When running the queue in the test harness, wait just a tad after forking a
6000 delivery process, to get repeatability of debugging output.
6002 41. Include certificate and key file names in error message when GnuTLS fails
6003 to set them up, because the GnuTLS error message doesn't include the name
6004 of the failing file when there is a problem reading it.
6006 42. Allow both -bf and -bF in the same test run.
6008 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6010 44. The "Exiscan patch" is now merged into the mainline Exim source.
6012 45. Sometimes the final signoff response after QUIT could fail to get
6013 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6014 < 0 before doing a fflush(). This bug looks as though it goes back to the
6015 introduction of TLS in release 3.20, but "sometimes" must have been rare
6016 because the tests only now provoked it.
6018 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6019 (this can affect the format of dates).
6021 47. exim_tidydb, when checking for the continued existence of a message for
6022 which it has found a message-specific retry record, was not finding
6023 messages that were in split spool directories. Consequently, it was
6024 deleting retry records that should have stayed in existence.
6026 48. Steve fixed some bugs in eximstats.
6028 49. The SPA authentication driver was not abandoning authentication and moving
6029 on to the next authenticator when an expansion was forced to fail,
6030 contradicting the general specification for all authenticators. Instead it
6031 was generating a temporary error. It now behaves as specified.
6033 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6034 (the order specifies the preference for clients). The order is now AES256,
6035 AES128, 3DES, ARCFOUR128.
6037 51. Small patch to Sieve code - explicitly set From: when generating an
6040 52. Exim crashed if a remote delivery caused a very long error message to be
6041 recorded - for instance if somebody sent an entire SpamAssassin report back
6042 as a large number of 550 error lines. This bug was coincidentally fixed by
6043 increasing the size of one of Exim's internal buffers (big_buffer) that
6044 happened as part of the Exiscan merge. However, to be on the safe side, I
6045 have made the code more robust (and fixed the comments that describe what
6048 53. Now that there can be additional text after "Completed" in log lines (if
6049 the queue_time_overall log selector is set), a one-byte patch to exigrep
6050 was needed to allow it to recognize "Completed" as not the last thing in
6053 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6054 patch that reportedly fixes this has been added. I am not expert enough to
6055 create a test for it. This is what the patch creator wrote:
6057 "I found a little strange behaviour of ldap code when working with
6058 Windows 2003 AD Domain, where users was placed in more than one
6059 Organization Units. When I tried to give exim partial DN, the exit code
6060 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6061 But simultaneously result of request was absolutely normal ldap result,
6062 so I produce this patch..."
6064 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6065 REFERENCE, so I have modified the code to exclude the patch when that macro
6068 55. Some experimental protocols are using DNS PTR records for new purposes. The
6069 keys for these records are domain names, not reversed IP addresses. The
6070 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6071 leaves it alone. Component reversal etc. now happens only for IP addresses.
6074 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6076 57. Double the size of the debug message buffer (to 2048) so that more of very
6077 long debug lines gets shown.
6079 58. The exicyclog utility now does better if the number of log files to keep
6080 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6082 59. Two changes related to the smtp_active_hostname option:
6084 (1) $smtp_active_hostname is now available as a variable.
6085 (2) The default for smtp_banner uses $smtp_active_hostname instead
6086 of $primary_hostname.
6088 60. The host_aton() function is supposed to be passed a string that is known
6089 to be a valid IP address. However, in the case of IPv6 addresses, it was
6090 not checking this. This is a hostage to fortune. Exim now panics and dies
6091 if the condition is not met. A case was found where this could be provoked
6092 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6093 components; fortuitously, this particular loophole had already been fixed
6094 by change 4.50/55 above.
6096 If there are any other similar loopholes, the new check in host_aton()
6097 itself should stop them being exploited. The report I received stated that
6098 data on the command line could provoke the exploit when Exim was running as
6099 exim, but did not say which command line option was involved. All I could
6100 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6101 running as the user.
6104 61. There was a buffer overflow vulnerability in the SPA authentication code
6105 (which came originally from the Samba project). I have added a test to the
6106 spa_base64_to_bits() function which I hope fixes it.
6109 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6110 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6112 63. The daemon start-up calls getloadavg() while still root for those OS that
6113 need the first call to be done as root, but it missed one case: when
6114 deliver_queue_load_max is set with deliver_drop_privilege. This is
6115 necessary for the benefit of the queue runner, because there is no re-exec
6116 when deliver_drop_privilege is set.
6118 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6119 This has been fixed.
6121 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6122 was in use, was not putting the data itself into the right store pool;
6123 consequently, it could be overwritten for a subsequent message in the same
6124 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6127 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6129 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6130 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6131 the function were treating the return as a boolean value, which happened to
6132 work because 0=false and not-0=true, but is not correct code.
6134 68. The host_aton() function was not handling scoped IPv6 addresses (those
6135 with, for example, "%eth0" on the end) correctly.
6137 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6138 negated items (that is, ~something) in unsigned ints. Some compilers
6139 apparently mutter when there is no cast.
6141 70. If an address verification called from an ACL failed, and did not produce a
6142 user-specific message (i.e. there was only a "system" message), nothing was
6143 put in $acl_verify_message. In this situation, it now puts the system
6146 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6147 session; change 4.31/43 added the unwanted input to the log line - except
6148 that it did not do this in the start of session case. It now does.
6150 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6151 This is wrong and can cause the other end to generate a synchronization
6152 error if it is another Exim or anything else that does the synchronization
6153 check. A QUIT command is no longer sent after a timeout.
6155 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6156 during host lookups.
6158 74. The defer_ok option of callout verification was not working if it was used
6159 when verifying addresses in header lines, that is, for this case:
6161 verify = header_sender/callout=defer_ok
6163 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6164 those file descriptors could be used for SMTP connections. If anything
6165 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6166 could be sent to the SMTP client, causing chaos. The daemon now opens
6167 stdin, stdout, and stderr to /dev/null when it puts itself into the
6170 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6171 log by default. The user can override this with suitable Perl magic.
6173 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6174 the log message when discard triggers, was not working for the DATA ACL or
6175 for the non-SMTP ACL.
6177 78. Error message wording change in sieve.c.
6179 79. If smtp_accept_max_per_host was set, the number of connections could be
6180 restricted to fewer than expected, because the daemon was trying to set up
6181 a new connection before checking whether the processes handling previous
6182 connections had finished. The check for completed processes is now done
6183 earlier. On busy systems, this bug wouldn't be noticed because something
6184 else would have woken the daemon, and it would have reaped the completed
6187 80. If a message was submitted locally by a user whose login name contained one
6188 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6189 It caused a spool format error. I have fixed the spool reading code. A
6190 related problem was that the "from" clause in the Received: line became
6191 illegal because of the space(s). It is now covered by ${quote_local_part.
6193 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6196 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6198 83. Patch from Sieve maintainer to fix unterminated string problem in
6199 "vacation" handling.
6201 84. Some minor changes to the Linux configuration files to help with other
6202 OS variants using glibc.
6204 85. One more patch for Sieve to update vacation handling to latest spec.
6207 ----------------------------------------------------
6208 See the note above about the 4.44 and 4.50 releases.
6209 ----------------------------------------------------
6215 1. Change 4.43/35 introduced a bug that caused file counts to be
6216 incorrectly computed when quota_filecount was set in an appendfile
6219 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6220 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6223 3. Give more explanation in the error message when the command for a transport
6224 filter fails to execute.
6226 4. There are several places where Exim runs a non-Exim command in a
6227 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6228 was being done only for the command run by the queryprogram router. It is
6229 now done for all such subprocesses. The other cases are: ${run, transport
6230 filters, and the commands run by the lmtp and pipe transports.
6232 5. Some older OS have a limit of 256 on the maximum number of file
6233 descriptors. Exim was using setrlimit() to set 1000 as a large value
6234 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6235 systems. I've change it so that if it can't get 1000, it tries for 256.
6237 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6238 was an oversight, and furthermore, ever since the addition of extra
6239 controls (e.g. 4.43/32), the checks on when to allow different forms of
6240 "control" were broken. There should now be diagnostics for all cases when a
6241 control that does not make sense is encountered.
6243 7. $recipients is now available in the predata ACL (oversight).
6245 8. Tidy the search cache before the fork to do a delivery from a message
6246 received from the command line. Otherwise the child will trigger a lookup
6247 failure and thereby defer the delivery if it tries to use (for example) a
6248 cached ldap connection that the parent has called unbind on.
6250 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6251 of $address_data from the recipient verification was clobbered by the
6252 sender verification.
6254 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6255 was its contents. (It was OK if the option was not defined at all.)
6257 11. A "Completed" log line is now written for messages that are removed from
6258 the spool by the -Mrm option.
6260 12. $host_address is now set to the target address during the checking of
6261 ignore_target_hosts.
6263 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6264 being passed; this would have caused $sender_host_name to have been used if
6265 matching the list had actually called for a host name (not very likely,
6266 since this list is usually IP addresses). A host name is now passed as
6269 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6270 code that specifies a non-restarting handler (typically sigaction() in
6271 modern systems) in an attempt to fix a rare and obscure crash bug.
6273 15. Narrowed the window for a race in the daemon that could cause it to ignore
6274 SIGCHLD signals. This is not a major problem, because they are used only to
6275 wake it up if nothing else does.
6277 16. A malformed maildirsize file could cause Exim to calculate negative values
6278 for the mailbox size or file count. Odd effects could occur as a result.
6279 The maildirsize information is now recalculated if the size or filecount
6282 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6283 support for a long time. Removed HAVE_SYS_VFS_H.
6285 18. Updated exipick to current release from John Jetmore.
6287 19. Allow an empty sender to be matched against a lookup in an address list.
6288 Previously the only cases considered were a regular expression, or an
6291 20. Exim went into a mad DNS lookup loop when doing a callout where the
6292 host was specified on the transport, if the DNS lookup yielded more than
6295 21. The RFC2047 encoding function was originally intended for short strings
6296 such as real names; it was not keeping to the 75-character limit for
6297 encoded words that the RFC imposes. It now respects the limit, and
6298 generates multiple encoded words if necessary. To be on the safe side, I
6299 have increased the buffer size for the ${rfc2047: expansion operator from
6302 22. Failure to deliver a bounce message always caused it to be frozen, even if
6303 there was an errors_to setting on the router. The errors_to setting is now
6306 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6307 canonical form (fully expanded) before being placed in
6308 $sender_host_address.
6310 24. Updated eximstats to version 1.33
6312 25. Include certificate and key file names in error message when GnuTLS fails
6313 to set them up, because the GnuTLS error message doesn't include the name
6314 of the failing file when there is a problem reading it.
6316 26. Expand error message when OpenSSL has problems setting up cert/key files.
6319 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6320 (this can affect the format of dates).
6322 28. exim_tidydb, when checking for the continued existence of a message for
6323 which it has found a message-specific retry record, was not finding
6324 messages that were in split spool directories. Consequently, it was
6325 deleting retry records that should have stayed in existence.
6327 29. eximstats updated to version 1.35
6328 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6329 1.35 - bugfix such that pie charts by volume are generated correctly
6331 30. The SPA authentication driver was not abandoning authentication and moving
6332 on to the next authenticator when an expansion was forced to fail,
6333 contradicting the general specification for all authenticators. Instead it
6334 was generating a temporary error. It now behaves as specified.
6336 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6337 (the order specifies the preference for clients). The order is now AES256,
6338 AES128, 3DES, ARCFOUR128.
6340 31. Small patch to Sieve code - explicitly set From: when generating an
6343 32. Exim crashed if a remote delivery caused a very long error message to be
6344 recorded - for instance if somebody sent an entire SpamAssassin report back
6345 as a large number of 550 error lines. This bug was coincidentally fixed by
6346 increasing the size of one of Exim's internal buffers (big_buffer) that
6347 happened as part of the Exiscan merge. However, to be on the safe side, I
6348 have made the code more robust (and fixed the comments that describe what
6351 33. Some experimental protocols are using DNS PTR records for new purposes. The
6352 keys for these records are domain names, not reversed IP addresses. The
6353 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6354 leaves it alone. Component reversal etc. now happens only for IP addresses.
6357 34. The host_aton() function is supposed to be passed a string that is known
6358 to be a valid IP address. However, in the case of IPv6 addresses, it was
6359 not checking this. This is a hostage to fortune. Exim now panics and dies
6360 if the condition is not met. A case was found where this could be provoked
6361 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6362 components; fortuitously, this particular loophole had already been fixed
6363 by change 4.50/55 or 4.44/33 above.
6365 If there are any other similar loopholes, the new check in host_aton()
6366 itself should stop them being exploited. The report I received stated that
6367 data on the command line could provoke the exploit when Exim was running as
6368 exim, but did not say which command line option was involved. All I could
6369 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6370 running as the user.
6373 35. There was a buffer overflow vulnerability in the SPA authentication code
6374 (which came originally from the Samba project). I have added a test to the
6375 spa_base64_to_bits() function which I hope fixes it.
6378 36. The daemon start-up calls getloadavg() while still root for those OS that
6379 need the first call to be done as root, but it missed one case: when
6380 deliver_queue_load_max is set with deliver_drop_privilege. This is
6381 necessary for the benefit of the queue runner, because there is no re-exec
6382 when deliver_drop_privilege is set.
6384 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6385 was in use, was not putting the data itself into the right store pool;
6386 consequently, it could be overwritten for a subsequent message in the same
6387 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6390 38. Sometimes the final signoff response after QUIT could fail to get
6391 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6392 < 0 before doing a fflush(). This bug looks as though it goes back to the
6393 introduction of TLS in release 3.20, but "sometimes" must have been rare
6394 because the tests only now provoked it.
6400 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6401 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6402 Now it returns an integer. A number of calls were still expecting a T/F
6403 return. Fortuitously, in all cases, the tests worked in OK situations,
6404 which is the norm. However, things would have gone wrong on any write
6405 failures on the smtp file descriptor. This function is used when sending
6406 messages over SMTP and also when doing verify callouts.
6408 2. When Exim is called to do synchronous delivery of a locally submitted
6409 message (the -odf or -odi options), it no longer closes stderr before doing
6412 3. Implemented the mua_wrapper option.
6414 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6416 5. Implemented the functions header_remove(), header_testname(),
6417 header_add_at_position(), and receive_remove_recipient(), and exported them
6420 6. If an ACL "warn" statement specified the addition of headers, Exim already
6421 inserted X-ACL-Warn: at the start if there was no header name. However, it
6422 was not making this test for the second and subsequent header lines if
6423 there were newlines in the string. This meant that an invalid header could
6424 be inserted if Exim was badly configured.
6426 7. Allow an ACL "warn" statement to add header lines at the start or after all
6427 the Received: headers, as well as at the end.
6429 8. Added the rcpt_4xx retry error code.
6431 9. Added postmaster_mailfrom=xxx to callout verification option.
6433 10. Added mailfrom=xxxx to the callout verification option, for verify=
6436 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6437 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6439 12. Inserted some casts to stop certain compilers warning when using pointer
6440 differences as field lengths or precisions in printf-type calls (mostly
6441 affecting debugging statements).
6443 13. Added optional readline() support for -be (dynamically loaded).
6445 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6446 same clock tick as a message's arrival, so that its received time was the
6447 same as the "first fail" time on the retry record, and that message
6448 remained on the queue past the ultimate address timeout, every queue runner
6449 would try a delivery (because it was past the ultimate address timeout) but
6450 after another failure, the ultimate address timeout, which should have then
6451 bounced the address, did not kick in. This was a "< instead of <=" error;
6452 in most cases the first failure would have been in the next clock tick
6453 after the received time, and all would be well.
6455 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6456 being recognized when the domain list was tested by the match_domain
6457 condition in an expansion string.
6459 16. Added the ${str2b64: operator.
6461 17. Exim was always calling setrlimit() to set a large limit for the number of
6462 processes, without checking whether the existing limit was already
6463 adequate. (It did check for the limit on file descriptors.) Furthermore,
6464 errors from getrlimit() and setrlimit() were being ignored. Now they are
6465 logged to the main and panic logs, but Exim does carry on, to try to do its
6466 job under whatever limits there are.
6468 18. Imported PCRE 5.0.
6470 19. Trivial typo in log message " temporarily refused connection" (the leading
6473 20. If the log selector return_path_on_delivery was set and an address was
6474 redirected to /dev/null, the delivery process crashed because it assumed
6475 that a return path would always be set for a "successful" delivery. In this
6476 case, the whole delivery is bypassed as an optimization, and therefore no
6479 21. Internal re-arrangement: the function for sending a challenge and reading
6480 a response while authentication was assuming a zero-terminated challenge
6481 string. It's now changed to take a pointer and a length, to allow for
6482 binary data in such strings.
6484 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6486 23. Exim was not respecting finduser_retries when seeking the login of the
6487 uid under which it was called; it was always trying 10 times. (The default
6488 setting of finduser_retries is zero.) Also, it was sleeping after the final
6489 failure, which is pointless.
6491 24. Implemented tls_on_connect_ports.
6493 25. Implemented acl_smtp_predata.
6495 26. If the domain in control=submission is set empty, Exim assumes that the
6496 authenticated id is a complete email address when it generates From: or
6497 Sender: header lines.
6499 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6500 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6501 chown and chgrp in /bin and hostname in /usr/bin.
6503 28. Exim was keeping the "process log" file open after each use, just as it
6504 does for the main log. This opens the possibility of it remaining open for
6505 long periods when the USR1 signal hits a daemon. Occasional processlog
6506 errors were reported, that could have been caused by this. Anyway, it seems
6507 much more sensible not to leave this file open at all, so that is what now
6510 29. The long-running daemon process does not normally write to the log once it
6511 has entered its main loop, and it closes the log before doing so. This is
6512 so that log files can straightforwardly be renamed and moved. However,
6513 there are a couple of unusual error situations where the daemon does write
6514 log entries, and I had neglected to close the log afterwards.
6516 30. The text of an SMTP error response that was received during a remote
6517 delivery was being truncated at 512 bytes. This is too short for some of
6518 the long messages that one sometimes sees. I've increased the limit to
6521 31. It is now possible to make retry rules that apply only when a message has a
6522 specific sender, in particular, an empty sender.
6524 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6525 it possible to be selective about when SMTP synchronization is enforced.
6527 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6529 32. Implemented hosts_connection_nolog.
6531 33. Added an ACL for QUIT.
6533 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6536 35. Added mailbox_size and mailbox_filecount to appendfile.
6538 36. Added control = no_multiline_responses to ACLs.
6540 37. There was a bug in the logic of the code that waits for the clock to tick
6541 in the case where the clock went backwards by a substantial amount such
6542 that the microsecond fraction of "now" was more than the microsecond
6543 fraction of "then" (but the whole seconds number was less).
6545 38. Added support for the libradius Radius client library this is found on
6546 FreeBSD (previously only the radiusclient library was supported).
6552 1. When certain lookups returned multiple values in the form name=value, the
6553 quoting of the values was not always being done properly. Specifically:
6554 (a) If the value started with a double quote, but contained no whitespace,
6556 (b) If the value contained whitespace other than a space character (i.e.
6557 tabs or newlines or carriage returns) it was not quoted.
6558 This fix has been applied to the mysql and pgsql lookups by writing a
6559 separate quoting function and calling it from the lookup code. The fix
6560 should probably also be applied to nisplus, ibase and oracle lookups, but
6561 since I cannot test any of those, I have not disturbed their existing code.
6563 2. A hit in the callout cache for a specific address caused a log line with no
6564 reason for rejecting RCPT. Now it says "Previous (cached) callout
6565 verification failure".
6567 3. There was an off-by-one bug in the queryprogram router. An over-long
6568 return line was truncated at 256 instead of 255 characters, thereby
6569 overflowing its buffer with the terminating zero. As well as fixing this, I
6570 have increased the buffer size to 1024 (and made a note to document this).
6572 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6573 when Exim is waiting for an SMTP response from a remote server, Exim
6574 restarts its select() call on the socket, thereby resetting its timeout.
6575 This is not a problem when such interrupts are rare. Somebody set up a cron
6576 job to run exiwhat every 2 minutes, which is less than the normal select()
6577 timeout (5 or 10 minutes). This meant that the select() timeout never
6578 kicked in because it was always reset. I have fixed this by comparing the
6579 time when an interrupt arrives with the time at the start of the first call
6580 to select(). If more time than the timeout has elapsed, the interrupt is
6581 treated as a timeout.
6583 5. Some internal re-factoring in preparation for the addition of Sieve
6584 extensions (by MH). In particular, the "personal" test is moved to a
6585 separate function, and given an option for scanning Cc: and Bcc: (which is
6586 not set for Exim filters).
6588 6. When Exim created an email address using the login of the caller as the
6589 local part (e.g. when creating a From: or Sender: header line), it was not
6590 quoting the local part when it contained special characters such as @.
6592 7. Installed new OpenBSD configuration files.
6594 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6595 try to make them clearer.
6597 9. Callout options, other than the timeout value, were being ignored when
6598 verifying sender addresses in header lines. For example, when using
6600 verify = header_sender/callout=no_cache
6602 the cache was (incorrectly) being used.
6604 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6605 only the Cygwin environment.
6607 11. When return_path_on_delivery was set as a log selector, if different remote
6608 addresses in the same message used different return paths and parallel
6609 remote delivery occurred, the wrong values would sometimes be logged.
6610 (Whenever a remote delivery process finished, the return path value from
6611 the most recently started remote delivery process was logged.)
6613 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6614 lines when AUTH and/or TLS are in use. This is the "received protocol"
6615 field. Exim used to use "asmtp" for authenticated SMTP, without any
6616 indication (in the protocol name) for TLS use. Now it follows the RFC and
6617 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6618 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6619 names appear in log lines as well as in Received: header lines.
6621 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6622 extensions, and comparison tests, and to fix some bugs.
6624 14. Changes to the "personal" filter test:
6626 (1) The test was buggy in that it was just doing the equivalent of
6627 "contains" tests on header lines. For example, if a user's address was
6628 anne@some.where, the "personal" test would incorrectly be true for
6630 To: susanne@some.where
6632 This test is now done by extracting each address from the header in turn,
6633 and checking the entire address. Other tests that are part of "personal"
6634 are now done using regular expressions (for example, to check local parts
6635 of addresses in From: header lines).
6637 (2) The list of non-personal local parts in From: addresses has been
6638 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6639 taken from the Sieve specification recommendations.
6641 (3) If the message contains any header line starting with "List-" it is
6642 treated as non-personal.
6644 (4) The test for "circular" in the Subject: header line has been removed
6645 because it now seems ill-conceived.
6647 15. Minor typos in src/EDITME comments corrected.
6649 16. Installed latest exipick from John Jetmore.
6651 17. If headers_add on a router specified a text string that was too long for
6652 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6653 of string_sprintf() is now avoided.
6655 18. $message_body_size was not set (it was always zero) when running the DATA
6656 ACL and the local_scan() function.
6658 19. For the "mail" command in an Exim filter, no default was being set for
6659 the once_repeat time, causing a random time value to be used if "once" was
6660 specified. (If the value happened to be <= 0, no repeat happened.) The
6661 default is now 0s, meaning "never repeat". The "vacation" command was OK
6662 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6663 (I found it when inspecting the code).
6665 20. There is now an overall timeout for performing a callout verification. It
6666 defaults to 4 times the callout timeout, which applies to individual SMTP
6667 commands during the callout. The overall timeout applies when there is more
6668 than one host that can be tried. The timeout is checked before trying the
6669 next host. This prevents very long delays if there are a large number of
6670 hosts and all are timing out (e.g. when the network connections are timing
6671 out). The value of the overall timeout can be changed by specifying an
6672 additional sub-option for "callout", called "maxwait". For example:
6674 verify = sender/callout=5s,maxwait=20s
6676 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6677 to the end before writing, but this should make it even safer).
6679 22. Exim was forgetting that it had advertised PIPELINING for the second and
6680 subsequent messages on an SMTP connection. It was also not resetting its
6681 memory on STARTTLS and an internal HELO.
6683 23. When Exim logs an SMTP synchronization error within a session, it now
6684 records whether PIPELINING has been advertised or not.
6686 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6687 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6688 rather than long int.
6690 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6692 26. Added the never_mail option to autoreply.
6698 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6699 crash if the getsockname() call failed; this can happen if a connection is
6700 closed very soon after it is established. The problem was simply in the
6701 order in which certain operations were done, causing Exim to try to write
6702 to the SMTP stream before it had set up the file descriptor. The bug has
6703 been fixed by making things happen in the correct order.
6709 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6710 before the connection was closed, thus losing the rejection response.
6712 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6713 some early Solaris releases, but causes trouble in current releases where
6714 socklen_t is defined.
6716 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6719 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6722 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6723 that releasing the top of it at the end releases what was used for sub-
6724 expansions (unless the block got too big). However, discard this block if
6725 the first thing is a variable or header, so that we can use its block when
6726 it is dynamic (useful for very large $message_headers, for example).
6728 6. Lookups now cache *every* query, not just the most recent. A new, separate
6729 store pool is used for this. It can be recovered when all lookup caches are
6730 flushed. Lookups now release memory at the end of their result strings.
6731 This has involved some general refactoring of the lookup sources.
6733 7. Some code has been added to the store_xxx() functions to reduce the amount
6734 of flapping under certain conditions.
6736 8. log_incoming_interface used to affect only the <= reception log lines. Now
6737 it causes the local interface and port to be added to several more SMTP log
6738 lines, for example "SMTP connection from", and rejection lines.
6740 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6742 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6744 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6745 could be overwritten at the end of the current message (or the start of a
6746 new message if it was set in a HELO ACL). The value is now preserved for
6747 the duration of the SMTP connection.
6749 12. If a transport had a headers_rewrite setting, and a matching header line
6750 contained an unqualified address, that address was qualified, even if it
6751 did not match any rewriting rules. The underlying bug was that the values
6752 of the flags that permit the existence of unqualified sender and recipient
6753 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6754 non-local messages, and by -bnq for local messages) were not being
6755 preserved with the message after it was received.
6757 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6758 "next input=" as part of the text comprising the host identity instead of
6759 the correct text. The code was using the same buffer for two different
6760 strings. However, depending on which order the printing function evaluated
6761 its arguments, the bug did not always show up. Under Linux, for example, my
6762 test suite worked just fine.
6764 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6765 doesn't work with some older versions of Perl. It has been changed to "my",
6766 which in any case is probably the better facility to use.
6768 15. A really picky compiler found some instances of statements for creating
6769 error messages that either had too many or two few arguments for the format
6772 16. The size of the buffer for calls to the DNS resolver has been increased
6773 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6774 for addresses that have a lot of PTR records. This alleviates a problem; it
6775 does not fully solve it.
6777 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6778 buffer now truncates the list and logs the incident, which is the same
6779 action as happens when Exim is looking up a host name and its aliases.
6780 Previously in this situation something unpredictable would happen;
6781 sometimes it was "internal error: store_reset failed".
6783 18. If a server dropped the connection unexpectedly when an Exim client was
6784 using GnuTLS and trying to read a response, the client delivery process
6785 crashed while trying to generate an error log message.
6787 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6788 string, for example:
6790 warn message = H1: something\nH2: something
6792 the text was added as a single header line from Exim's point of view
6793 though it ended up OK in the delivered message. However, searching for the
6794 second and subsequent header lines using $h_h2: did not work. This has been
6795 fixed. Similarly, if a system filter added multiple headers in this way,
6796 the routers could not see them.
6798 20. Expanded the error message when iplsearch is called with an invalid key to
6799 suggest using net-iplsearch in a host list.
6801 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6802 ACLs are no longer actually imposed (and a message to that effect is
6805 22. If a "gecos" field in a passwd entry contained escaped characters, in
6806 particular, if it contained a \" sequence, Exim got it wrong when building
6807 a From: or a Sender: header from that name. A second bug also caused
6808 incorrect handling when an unquoted " was present following a character
6809 that needed quoting.
6811 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6812 was not being matched caselessly.
6814 24. Arranged for all hyphens in the exim.8 source to be escaped with
6817 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6818 properly. Recipient callout cache records were still being keyed to include
6819 the sender, even when use_sender was set false. This led to far more
6820 callouts that were necessary. The sender is no longer included in the key
6821 when use_sender is false.
6823 26. Added "control = submission" modifier to ACLs.
6825 27. Added the ${base62d: operator to decode base 62 numbers.
6827 28. dnsdb lookups can now access SRV records.
6829 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6830 the configuration file.
6832 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6833 (-v) mode. This makes the output for a verbose queue run more intelligible.
6835 31. Added a use_postmaster feature to recipient callouts.
6837 32. Added the $body_zerocount variable, containing the number of binary zero
6838 bytes in the message body.
6840 33. The time of last modification of the "new" subdirectory is now used as the
6841 "mailbox time last read" when there is a quota error for a maildir
6844 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6846 35. Added +ignore_unknown as a special item in host lists.
6848 36. Code for decoding IPv6 addresses in host lists is now included, even if
6849 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6850 address was recognized as an IP address, but was then not correctly decoded
6851 into binary, causing unexpected and incorrect effects when compared with
6858 1. Very minor rewording of debugging text in manualroute to say "list of
6859 hosts" instead of "hostlist".
6861 2. If verify=header_syntax was set, and a header line with an unqualified
6862 address (no domain) and a large number of spaces between the end of the
6863 name and the colon was received, the reception process suffered a buffer
6864 overflow, and (when I tested it) crashed. This was caused by some obsolete
6865 code that should have been removed. The fix is to remove it!
6867 3. When running in the test harness, delay a bit after writing a bounce
6868 message to get a bit more predictability in the log output.
6870 4. Added a call to search_tidyup() just before forking a reception process. In
6871 theory, someone could use a lookup in the expansion of smtp_accept_max_
6872 per_host which, without the tidyup, could leave open a database connection.
6874 5. Added the variables $recipient_data and $sender_data which get set from a
6875 lookup success in an ACL "recipients" or "senders" condition, or a router
6876 "senders" option, similar to $domain_data and $local_part_data.
6878 6. Moved the writing of debug_print from before to after the "senders" test
6881 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6882 problems for message scanning, either using a data ACL, or using
6883 local_scan() because the Received: header was not generated till after they
6884 were called (in order to set the time as the time of reception completion).
6885 I have revised the way this works. The header is now generated after the
6886 body is received, but before the ACL or local_scan() are called. After they
6887 are run, the timestamp in the header is updated.
6893 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6894 before starting a queue runner without re-exec. This happened only when
6895 deliver_drop_privilege was set or when the Exim user was set to root. The
6896 effect of the bug was that timeouts during subsequent deliveries caused
6897 crashes instead of being properly handled. The handler is now left at its
6898 default (and expected) setting.
6900 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6901 message, again when deliver_drop_privilege is set or Exim is run as root.
6902 The bug described in (1) was not present in this case, but the tidying up
6903 of the other signals was missing. I have made the two cases consistent.
6905 3. The ignore_target_hosts setting on a manualroute router was being ignored
6906 for hosts that were looked up using the /MX notation.
6908 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6911 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6912 operated on the sender address. After changing the $sender_address to <>
6913 for the sender address verify, Exim was re-instated it as the original
6914 (before rewriting) address, but remembering that it had rewritten it, so it
6915 wasn't rewriting it again. This bug also had the effect of breaking the
6916 sender address verification caching when the sender address was rewritten.
6918 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6919 This has been changed so that if the ip literal address matches
6920 ignore_target_hosts, the router declines.
6922 7. Added expansion conditions match_domain, match_address, and match_local_
6923 part (NOT match_host).
6925 8. The placeholder for the Received: header didn't have a length field set.
6927 9. Added code to Exim itself and to exim_lock to test for a specific race
6928 condition that could lead to file corruption when using MBX delivery. The
6929 issue is with the lockfile that is created in /tmp. If this file is removed
6930 after a process has opened it but before that process has acquired a lock,
6931 there is the potential for a second process to recreate the file and also
6932 acquire a lock. This could lead to two Exim processes writing to the file
6933 at the same time. The added code performs the same test as UW imapd; it
6934 checks after acquiring the lock that its file descriptor still refers to
6935 the same named file.
6937 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6938 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6941 11. Added the smtp_active_hostname option. If used, this will typically be made
6942 to depend on the incoming interface address. Because $interface_address is
6943 not set up until the daemon has forked a reception process, error responses
6944 that can happen earlier (such as "too many connections") no longer contain
6947 12. If an expansion in a condition on a "warn" statement fails because a lookup
6948 defers, the "warn" statement is abandoned, and the next ACL statement is
6949 processed. Previously this caused the whole ACL to be aborted.
6951 13. Added the iplsearch lookup type.
6953 14. Added ident_timeout as a log selector.
6955 15. Added tls_certificate_verified as a log selector.
6957 16. Added a global option tls_require_ciphers (compare the smtp transport
6958 option of the same name). This controls incoming TLS connections.
6960 17. I finally figured out how to make tls_require_ciphers do a similar thing
6961 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6962 before starting the TLS session.
6964 18. Tabs are now shown as \t in -bP output.
6966 19. If the log selector return_path_on_delivery was set, Exim crashed when
6967 bouncing a message because it had too many Received: header lines.
6969 20. If two routers both had headers_remove settings, and the first one included
6970 a superfluous trailing colon, the final name in the first list and the
6971 first name in the second list were incorrectly joined into one item (with a
6972 colon in the middle).
6978 1. Added -C and -D options to the exinext utility, mainly to make it easier
6979 to include in the automated testing, but these could be helpful when
6980 multiple configurations are in use.
6982 2. The exinext utility was not formatting the output nicely when there was
6983 an alternate port involved in the retry record key, nor when there was a
6984 message id as well (for retries that were specific to a specific message
6985 and a specific host). It was also confused by IPv6 addresses, because of
6986 the additional colons they contain. I have fixed the IPv4 problem, and
6987 patched it up to do a reasonable job for IPv6.
6989 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6990 delivery, the log line now contains "pipelined" if PIPELINING was used.
6992 4. An SMTP transport process used to panic and die if the bind() call to set
6993 an explicit outgoing interface failed. This has been changed; it is now
6994 treated in the same way as a connect() failure.
6996 5. A reference to $sender_host_name in the part of a conditional expansion
6997 that was being skipped was still causing a DNS lookup. This no longer
7000 6. The def: expansion condition was not recognizing references to header lines
7001 that used bh_ and bheader_.
7003 7. Added the _cache feature to named lists.
7005 8. The code for checking quota_filecount in the appendfile transport was
7006 allowing one more file than it should have been.
7008 9. For compatibility with Sendmail, the command line option
7016 and sets the incoming protocol and host name (for trusted callers). The
7017 host name and its colon can be omitted when only the protocol is to be set.
7018 Note the Exim already has two private options, -pd and -ps, that refer to
7019 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7020 "s", but I don't think that's a major issue.
7022 10. A number of refactoring changes to the code, none of which should affect
7025 (a) The number of logging options was getting close to filling up the
7026 32-bit word that was used as a bit map. I have split them into two classes:
7027 those that are passed in the argument to log_write(), and those that are
7028 only ever tested independently outside of that function. These are now in
7029 separate 32-bit words, so there is plenty of room for expansion again.
7030 There is no change in the user interface or the logging behaviour.
7032 (b) When building, for example, log lines, the code previously used a
7033 macro that called string_cat() twice, in order to add two strings. This is
7034 not really sufficiently general. Furthermore, there was one instance where
7035 it was actually wrong because one of the argument was used twice, and in
7036 one call a function was used. (As it happened, calling the function twice
7037 did not affect the overall behaviour.) The macro has been replaced by a
7038 function that can join an arbitrary number of extra strings onto a growing
7041 (c) The code for expansion conditions now uses a table and a binary chop
7042 instead of a serial search (which was left over from when there were very
7043 few conditions). Also, it now recognizes conditions like "pam" even when
7044 the relevant support is not compiled in: a suitably worded error message is
7045 given if an attempt is made to use such a condition.
7047 11. Added ${time_interval:xxxxx}.
7049 12. A bug was causing one of the ddress fields not to be passed back correctly
7050 from remote delivery subprocesses. The field in question was not being
7051 subsequently used, so this caused to problems in practice.
7053 13. Added new log selectors queue_time and deliver_time.
7055 14. Might have fixed a bug in maildirsizefile handling that threw up
7056 "unexpected character" debug warnings, and recalculated the data
7057 unnecessarily. In any case, I expanded the warning message to give more
7060 15. Added the message "Restricted characters in address" to the statements in
7061 the default ACL that block characters like @ and % in local parts.
7063 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7064 Three changes have been made:
7066 (a) There was a serious bug; a negative response to MAIL caused the whole
7067 recipient domain to be cached as invalid, thereby blocking all messages
7068 to all local parts at the same domain, from all senders. This bug has
7069 been fixed. The domain is no longer cached after a negative response to
7070 MAIL if the sender used is not empty.
7072 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7075 (c) A new callout option, "use_sender" has been added for people who want
7076 the modified behaviour.
7082 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7085 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7086 indeed breaks things for older releases.
7088 3. Added additional logging to the case where there is a problem reading data
7089 from a filter that is running in a subprocess using a pipe, in order to
7090 try to track down a specific problem.
7092 4. Testing facility fudge: when running in the test harness and attempting
7093 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7094 getting "No route to host". Convert this to a timeout.
7096 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7099 6. Some OS don't have socklen_t but use size_t instead. This affects the
7100 fifth argument of getsockopt() amongst other things. This is now
7101 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7102 can be set for individual OS. I have set it for SunOS5, OSF1, and
7103 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7104 some earlier ones do not.
7106 7. Change 4.30/15 was not doing the test caselessly.
7108 8. The standard form for an IPv6 address literal was being rejected by address
7109 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7110 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7111 this, as well as the form without the "IPv6" on the front (but only when
7112 address literals are enabled, of course).
7114 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7116 10. Exim crashed if a message with an empty sender address specified by -f
7117 encountered a router with an errors_to setting. This could be provoked only
7118 by a command such as
7122 where an empty string was supplied; "<>" did not hit this bug.
7124 11. Installed PCRE release 4.5.
7126 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7127 remained set. It is now erased.
7129 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7130 times from message ids (which are base 36 rather than the normal 62).
7132 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7133 were being counted as actual protocol errors, and logged if the log
7134 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7135 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7136 and DATA following a set of rejected RCPTs do not count as protocol errors.
7137 In other words, Exim assumes they were pipelined, though this may not
7138 actually be the case. Of course, in all cases the client gets an
7139 appropriate error code.
7141 15. If a lookup fails in an ACL condition, a message about the failure may
7142 be available; it is used if testing the ACL cannot continue, because most
7143 such messages specify what the cause of the deferral is. However, some
7144 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7145 that caused an old message to be retained and used if a later statement
7146 caused a defer, replacing the real cause of the deferral.
7148 16. If an IP address had so many PTR records that the DNS lookup buffer
7149 was not large enough to hold them, Exim could crash while trying to process
7150 the truncated data. It now detects and logs this case.
7152 17. Further to 4.21/58, another change has been made: if (and only if) the
7153 first line of a message (the first header line) ends with CRLF, a bare LF
7154 in a subsequent header line has a space inserted after it, so as not to
7155 terminate the header.
7157 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7158 unnecessarily, used atoi() instead of strtol(), and didn't check the
7159 termination when getting file sizes from file names by regex.
7161 19. Completely re-implemented the support for maildirsize files, in the light
7162 of a number of problems with the previous contributed implementation
7163 (4.30/29). In particular:
7165 . If the quota is zero, the maildirsize file is maintained, but no quota is
7168 . If the maildir directory does not exist, it is created before any attempt
7169 to write a maildirsize file.
7171 . The quota value in the file is just a cache; if the quota is changed in
7172 the transport, the new value overrides.
7174 . A regular expression is available for excluding directories from the
7177 20. The autoreply transport checks the characters in options that define the
7178 message's headers; it allows continued headers, but it was checking with
7179 isspace() after an embedded newline instead of explicitly looking for a
7182 21. If all the "regular" hosts to which an address was routed had passed their
7183 expiry times, and had not reached their retry times, the address was
7184 bounced, even if fallback hosts were defined. Now Exim should go on to try
7187 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7188 equivalent code in the SMTP transport. Some hosts send humungous responses
7189 to HELO/EHLO, more than 1024 it seems.
7191 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7192 gives compiler warnings in some environments. I've now done it "properly",
7195 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7196 (because of problems with the built-in one) was declared to return uschar *
7197 instead of char *, causing compiler failure.
7199 25. Fixed a file descriptor leak when processing alias/forward files.
7201 26. Fixed a minor format string issue in dbfn.c.
7203 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7205 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7206 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7209 29. When a sender address is verified, it is cached, to save repeating the test
7210 when there is more than one recipient in a message. However, when the
7211 verification involves a callout, it is possible for different callout
7212 options to be set for different recipients. It is too complicated to keep
7213 track of this in the cache, so now Exim always runs a verification when a
7214 callout is required, relying on the callout cache for the optimization.
7215 The overhead is duplication of the address routing, but this should not be
7218 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7219 to be verified with callout=postmaster, and the main callout worked but the
7220 postmaster check failed, the verification correctly failed. However, if a
7221 subsequent RCPT command asked for sender verification *without* the
7222 postmaster check, incorrect caching caused this verification also to fail,
7225 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7226 it was not caching the DNS options (qualify_single, search_parents) that
7227 were used when the lookup failed. A subsequent lookup with different
7228 options therefore always gave the same answer, though there were cases
7229 where it should not have. (Example: a "domains = !$mx_any" option on a
7230 dnslookup router: the "domains" option is always processed without any
7231 widening, but the router might have qualify_single set.) Now Exim uses the
7232 cached value only when the same options are set.
7234 32. Added John Jetmore's "exipick" utility to the distribution.
7236 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7237 than a timeout (e.g. a certificate is required, and is not provided), an
7238 Exim server now closes the connection immediately. Previously it waited for
7239 the client to close - but if the client is SSL, it seems that they each
7240 wait for each other, leading to a delay before one of them times out.
7242 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7243 maintained 0.8.x compatibility because I don't think many are using it, and
7244 it is clearly obsolete.
7246 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7249 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7250 client certificate was expired. A simple patch fixes this, though I don't
7251 understand the full logic of why the verify callback is called multiple
7254 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7255 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7256 which causes problems with some clients (such as the Certicom SSL Plus
7257 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7258 disables the coutermeasure allowing Eudora to connect."
7260 38. Exim was not checking that a write() to a log file succeeded. This could
7261 lead to Bad Things if a log got too big, in particular if it hit a file
7262 size limit. Exim now panics and dies if it cannot write to a log file, just
7263 as it does if it cannot open a log file.
7265 39. Modified OS/Makefile-Linux so that it now contains
7267 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7269 The two -D definitions ensure that Exim is compiled with large file
7270 support, which makes it possible to handle log files that are bigger than
7273 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7274 instance) a domain was checked against a named list that involved a lookup,
7275 causing $domain_data to be set, then another domain was checked against the
7276 same list, then the first domain was re-checked, the value of $domain_data
7277 after the final check could be wrong. In particular, if the second check
7278 failed, it could be set empty. This bug probably also applied to
7281 41. The strip_trailing_dot option was not being applied to the address given
7282 with the -f command-line option.
7284 42. The code for reading a message's header from the spool was incrementing
7285 $received_count, but never initializing it. This meant that the value was
7286 incorrect (doubled) while delivering a message in the same process in which
7287 it was received. In the most common configuration of Exim, this never
7288 happens - a fresh exec is done - but it can happen when
7289 deliver_drop_privilege is set.
7291 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7292 it now includes up to 150 characters of the unexpected data in the log
7295 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7296 and building data strings. The size of both of these buffers was 10 000
7297 bytes - far larger than anybody would *ever* want, thought I. Needless to
7298 say, somebody hit the limit. I have increased the maximum line length to
7299 20 000 and the maximum data length of concatenated lines to 100 000. I have
7300 also fixed two bugs, because there was no checking on these buffers. Tsk,
7301 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7302 buffer is too small.
7304 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7305 lsearch lookups. Now it does.
7307 46. When parsing a route_list item in a manualroute router, a fixed-length
7308 buffer was used for the list of hosts. I made this 1024 bytes long,
7309 thinking that nobody would ever have a list of hosts that long. Wrong.
7310 Somebody had a whole pile of complicated expansion conditions, and the
7311 string was silently truncated, leading to an expansion error. It turns out
7312 that it is easier to change to an unlimited length (owing to other changes
7313 that have happened since this code was originally written) than to build
7314 structure for giving a limitation error. The length of the item that
7315 expands into the list of hosts is now unlimited.
7317 47. The lsearch lookup could not handle data where the length of text line was
7318 more than 4095 characters. Such lines were truncated, leading to shortened
7319 data being returned. It should now handle lines of any length.
7321 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7322 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7325 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7326 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7327 no longer happens in comment lines. A list of replacements is now placed
7328 at the head of all of the source files, except those whose only change is
7329 to replace PERL_COMMAND in the very first #! line.
7331 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7332 messages on the queue, with a bottom-up merge sort, using code contributed
7333 by Michael Haardt. This should make operations like -bp somewhat faster on
7334 large queues. It won't affect queue runners, except when queue_run_in_order
7337 51. Installed eximstats 1.31 in the distribution.
7339 52. Added support for SRV lookups to the dnslookup router.
7341 53. If an ACL referred to $message_body or $message_body_end, the value was not
7342 reset for any messages that followed in the same SMTP session.
7344 54. The store-handling optimization for building very long strings was not
7345 differentiating between the different store pools. I don't think this
7346 actually made any difference in practice, but I've tidied it.
7348 55. While running the routers to verify a sender address, $sender_address
7349 was still set to the sender address. This is wrong, because when routing to
7350 send a bounce to the sender, it would be empty. Therefore, I have changed
7351 it so that, while verifying a sender address, $sender_address is set to <>.
7352 (There is no change to what happens when verifying a recipient address.)
7354 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7355 target A or AAAA records (if not already returned) without resetting the
7356 qualify_single or search_parents options of the DNS resolver. These are
7357 inappropriate in this case because the targets of MX and SRV records must
7358 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7359 target that, when qualified, matched something in the local domain. These
7360 two options are now turned off when doing these lookups.
7362 57. It seems that at least some releases of Reiserfs (which does not have the
7363 concept of a fixed number of inodes) returns zero and not -1 for the
7364 number of available inodes. This interacted badly with check_spool_inodes,
7365 which assumed that -1 was the "no such thing" setting. What I have done is
7366 to check that the total number of inodes is greater than zero before doing
7367 the test of how many are available.
7369 58. When a "warn" ACL statement has a log_message modifier, the message is
7370 remembered, and not repeated. This is to avoid a lot of repetition when a
7371 message has many recipients that cause the same warning to be written.
7372 However, Exim was preserving the list of already written lines for an
7373 entire SMTP session, which doesn't seem right. The memory is now reset if a
7374 new message is started.
7376 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7377 debugging output unless log_rewrite was also set.
7379 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7380 of (int)(handle) when we know that handle contains (void *)(-1).
7382 61. The Exim daemon panic-logs an error return when it closes the incoming
7383 connection. However "connection reset by peer" seems to be common, and
7384 isn't really an error worthy of noting specially, so that particular error
7387 62. When Exim is trying to find all the local interfaces, it used to panic and
7388 die if the ioctl to get the interface flags failed. However, it seems that
7389 on at least one OS (Solaris 9) it is possible to have an interface that is
7390 included in the list of interfaces, but for which you get a failure error
7391 for this call. This happens when the interface is not "plumbed" into a
7392 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7393 failure of the "get flags" call assumes that the interface is down.
7395 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7396 makes life easier for people who are doing arithmetic on fields extracted
7397 from dates, where you often get leading zeros that should not be
7398 interpreted as octal.
7400 64. Added qualify_domain to the redirect router, to override the global
7403 65. If a pathologically long header line contained very many addresses (the
7404 report of this problem mentioned 10 000) and each of them was rewritten,
7405 Exim could use up a very large amount of memory. (It kept on making new
7406 copies of the header line as it rewrote, and never released the old ones.)
7407 At the expense of a bit more processing, the header rewriting function has
7408 been changed so that it no longer eats memory in this way.
7410 66. The generation of the Received: header has been moved from the time that a
7411 message starts to be received, to the time that it finishes. The timestamp
7412 in the Received: header should now be very close to that of the <= log
7413 line. There are two side-effects of this change:
7415 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7416 logged header lines no longer include the local Received: line, because
7417 it has not yet been created. The same applies to a copy of the message
7418 that is returned to a non-SMTP sender when a message is rejected.
7420 (b) When a filter file is tested using -bf, no additional Received: header
7421 is added to the test message. After some thought, I decided that this
7424 This change does not affect the value of $received_for. It is still set
7425 after address rewriting, but before local_scan() is called.
7427 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7429 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7430 gave an unhelpful panic error message, and a defer error. I have managed to
7431 change this behaviour so that it now rejects any supplied certificate,
7432 which seems right, as the list of acceptable certificates is empty.
7434 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7435 gave an unhelpful defer error. I have not managed to make this reject any
7436 supplied certificates, but the error message it gives is "no certificate
7437 supplied", which is not helpful.
7439 70. exigrep's output now also includes lines that are not associated with any
7440 message, but which match the given pattern. Implemented by a patch from
7441 Martin Sluka, which also tidied up the Perl a bit.
7443 71. Recipient callout verification, like sender verification, was using <> in
7444 the MAIL FROM command. This isn't really the right thing, since the actual
7445 sender may affect whether the remote host accepts the recipient or not. I
7446 have changed it to use the actual sender in the callout; this means that
7447 the cache record is now keyed on a recipient/sender pair, not just the
7448 recipient address. There doesn't seem to be a real danger of callout loops,
7449 since a callout by the remote host to check the sender would use <>.
7450 [SEE ABOVE: changed after hitting problems.]
7452 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7453 temporary errors. However, in the case of such a code being given after
7454 the end of a data transmission (i.e. after ".") Exim was failing to write
7455 a retry record for the message. (Yes, there was some broken host that was
7456 actually sending 8xx at this point.)
7458 73. An unknown lookup type in a host list could cause Exim to panic-die when
7459 the list was checked. (An example that provoked this was putting <; in the
7460 middle of a list instead of at the start.) If this happened during a DATA
7461 ACL check, a -D file could be left lying around. This kind of configuration
7462 error no longer causes Exim to die; instead it causes a defer error. The
7463 incident is still logged to the main and panic logs.
7465 74. Buglet left over from Exim 3 conversion. The message "too many messages
7466 in one connection" was written to the rejectlog but not the mainlog, except
7467 when address rewriting (yes!) was being logged.
7469 75. Added write_rejectlog option.
7471 76. When a system filter was run not as root (that is, when system_filter_user
7472 was set), the values of the $n variables were not being returned to the
7473 main process; thus, they were not subsequently available in the $sn
7476 77. Added +return_path_on_delivery log selector.
7478 78. A connection timeout was being treated differently from recipients deferred
7479 when testing hosts_max_try with a message that was older than the host's
7480 retry timeout. (The host should not be counted, thus allowing all hosts to
7481 be tried at least once before bouncing.) This may have been the cause of an
7482 occasionally reported bug whereby a message would remain on the queue
7483 longer than the retry timeout, but would be bounced if a delivery was
7484 forced. I say "may" because I never totally pinned down the problem;
7485 setting up timeout/retry tests is difficult. See also the next item.
7487 79. The ultimate address timeout was not being applied to errors that involved
7488 a combination of host plus message (for example, a timeout on a MAIL
7489 command). When an address resolved to a number of possible hosts, and they
7490 were not all tried for each delivery (e.g. because of hosts_max_try), a
7491 message could remain on the queue longer than the retry timeout.
7493 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7496 81. Fixed an obscure SMTP outgoing bug which required at least the following
7497 conditions: (a) there was another message waiting for the same server;
7498 (b) the server returned 5xx to all RCPT commands in the first message so
7499 that the message was not completed; (c) the server dropped the connection
7500 or gave a negative response to the RSET that Exim sends to abort the
7501 transaction. The observed case was a dropped connection after DATA that had
7502 been sent in pipelining mode. That is, the server had advertised PIPELINING
7503 but was not implementing it correctly. The effect of the bug was incorrect
7504 behaviour, such as trying another host, and this could lead to a crash.
7510 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7511 and daemon.c were passed as pointers to ints; they should have been
7512 pointers to socklen_t variables (which are typically unsigned ints).
7514 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7517 3. Fixed a really odd bug that affected only the testing scheme; patching a
7518 certain fixed string in the binary changed the value of another string that
7519 happened to be identical to the end of the original first string.
7521 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7522 name", it returns that address as the IP address. On some operating
7523 systems (e.g. Solaris), it also passes back the IP address string as the
7524 "host name". However, on others (e.g. Linux), it passes back an empty
7525 string. Exim wasn't checking for this, and was changing the host name to an
7526 empty string, assuming it had been canonicalized.
7528 5. Although rare, it is permitted to have more than one PTR record for a given
7529 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7530 all the names associated with an address, because they do in Solaris.
7531 However, it seems that they do not in Linux for data that comes from the
7532 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7533 I found this out when I moved to a new Linux workstation and tried to run
7534 the Exim test suite.
7536 To get round this problem I have changed the code so that it now does its
7537 own call to the DNS to look up PTR records when searching for a host name.
7538 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7539 addresses that are only in /etc/hosts are still found.
7541 This behaviour is, however, controlled by an option called host_lookup_
7542 order, which defaults to "bydns:byaddr". If people want to use the other
7543 order, or indeed, just use one or the other means of lookup, they can
7544 specify it in this variable.
7546 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7547 some operating systems, this comes back from gethostbyaddr() as an empty
7548 string, and this is what Exim used to test for. However, it seems that in
7549 other systems, "." is yielded. Exim now tests for this case too.
7551 7. The values of check_spool_space and check_log_space are now held internally
7552 as a number of kilobytes instead of an absolute number of bytes. If a
7553 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7554 kilobyte. This means that much larger values can be stored.
7556 8. Exim monitor: an attempt to get the action menu when not actually pointing
7557 at a message produces an empty menu entitled "No message selected". This
7558 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7559 no entries in it ("Shell widget menu has zero width and/or height"). So I
7560 have added a single, blank menu entry in this case.
7562 9. Added ${quote_local_part.
7564 10. MIME decoding is now applied to the contents of Subject: header lines when
7567 11. Now that a reference to $sender_host_address automatically causes a reverse
7568 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7569 host lookup before query-style lookups in lists that might use this
7570 variable. This has therefore been abolished, and the "net-" prefix is no
7571 longer necessary for query-style lookups.
7573 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7574 have been a typo for LFLAGS, so it has been changed.
7576 13. The install script calls Exim with "-C /dev/null" in order to find the
7577 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7578 to be output. However, since Exim outputs its version number before the
7579 error, it didn't break the script. It just looked ugly. I fixed this by
7580 always allowing "-C /dev/null" if the caller is root.
7582 14. Ignore overlarge ACL variable number when reading spool file - insurance
7583 against a later release with more variables having written the file.
7585 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7586 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7587 this, as well as the form without the "IPv6" on the front.
7589 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7590 OS/Makefile-Darwin file.
7592 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7593 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7595 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7596 variable. However, some OS use ints for inodes. I've added cast to long int
7597 to get rid of the compiler warning.
7599 19. I had forgotten to lock out "/../" in configuration file names when
7600 ALT_CONFIG_PREFIX was set.
7602 20. Routers used for verification do not need to specify transports. However,
7603 if such a router generated a host list, and callout was configured, Exim
7604 crashed, because it could not find a port number from the (non-existent)
7605 transport. It now assumes port 25 in this circumstance.
7607 21. Added the -t option to exigrep.
7609 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7610 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7611 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7612 them is set, LOOKUP_LSEARCH is forced.
7614 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7616 24. Added sender and host information to the "rejected by local_scan()" log
7617 line; previously there was no indication of these.
7619 25. Added .include_if_exists.
7621 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7622 Linux. It turns out that not all file systems support this. Apparently some
7623 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7624 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7625 not supported on the file descriptor, is now ignored when Exim is trying to
7626 sync a directory. This applies only to Linux.
7628 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7630 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7631 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7634 29. Added support for maildirsize files from supplied patch (modified a bit).
7636 30. The use of :fail: followed by an empty string could lead Exim to respond to
7637 sender verification failures with (e.g.):
7639 550 Verification failed for <xxx>
7640 550 Sender verify failed
7642 where the first response line was missing the '-' that indicates it is not
7643 the final line of the response.
7645 31. The loop for finding the name of the user that called Exim had a hardwired
7646 limit of 10; it now uses the value of finduser_retries, which is used for
7647 all other user lookups.
7649 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7652 33. Exim was neglecting to zero errno before one call of strtol() when
7653 expanding a string and expecting an integer value. On some systems this
7654 resulted in spurious "integer overflow" errors. Also, it was casting the
7655 result into an int without checking.
7657 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7658 did not work. The code looks as if it has *never* worked, though it appears
7659 to have been documented since at least release 1.62. I have made it work.
7661 35. The "timeout_DNS" error in retry rules, also documented since at least
7662 1.62, also never worked. As it isn't clear exactly what this means, and
7663 clearly it isn't a major issue, I have abolished the feature by treating it
7664 as "timeout", and writing a warning to the main and panic logs.
7666 36. The display of retry rules for -brt wasn't always showing the error code
7669 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7670 timeout_connect_A, timeout_connect_MX.
7672 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7673 to the empty sender.
7675 39. The daemon was not analysing the content of -oX till after it had closed
7676 stderr and disconnected from the controlling terminal. This meant that any
7677 syntax errors were only noted on the panic log, and the return code from
7678 the command was 0. By re-arranging the code a little, I've made the
7679 decoding happen first, so such errors now appear on stderr, and the return
7680 code is 1. However, the actual setting up of the sockets still happens in
7681 the disconnected process, so errors there are still only recorded on the
7684 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7685 connections (as happens on some IP stacks) was logged at start up time as
7686 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7687 it from "IPv6 and IPv4", which means that two separate sockets are being
7690 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7691 says whether AF_INET or AF_INET6 was passed as an argument.
7693 42. Exiwhat output was messed up when time zones were included in log
7696 43. Exiwhat now gives more information about the daemon's listening ports,
7697 and whether -tls-on-connect was used.
7699 44. The "port" option of the smtp transport is now expanded.
7701 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7702 silently ignored. Now an error message is written to the main and panic
7705 46. There's a new ACL modifier called "logwrite" which writes to a log file
7706 as soon as it is encountered.
7708 47. Added $local_user_uid and $local_user_gid at routing time.
7710 48. Exim crashed when trying to verify a sender address that was being
7713 49. Exim was recognizing only a space character after ".include". It now also
7714 recognizes a tab character.
7716 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7717 extracting the relevant information from the specification. The man page no
7718 longer contains scrambled data for the -d option, and I've added a section
7719 at the front about calling Exim under different names.
7721 51. Added "extra_headers" argument to the "mail" command in filter files.
7723 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7726 53. Installed eximstats 1.29.
7728 54. Added transport_filter_timeout as a generic transport option.
7730 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7731 Cc: header lines. This was required by RFC 822, but it not required by RFC
7734 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7735 incoming messages that did not have them. Now it does so only if the
7736 message originates locally, that is, if there is no associated remote host
7737 address. When Resent- header lines are present, this applies to the Resent-
7738 lines rather than the non-Resent- lines.
7740 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7741 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7743 58. Messages for configuration errors now include the name of the main
7744 configuration file - useful now that there may be more than one file in a
7745 list (.included file names were always shown).
7747 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7748 for those rare installations that do not start the daemon as root or run it
7749 setuid root. I've cut out the call to initgroups() if the daemon is not
7752 60. The Exim user and group can now be bound into the binary as text strings
7753 that are looked up at the start of Exim's processing.
7755 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7757 62. Added $mailstore_basename variable.
7759 63. Installed patch to sieve.c from Michael Haardt.
7761 64. When Exim failed to open the panic log after failing to open the main log,
7762 the original message it was trying to log was written to stderr and debug
7763 output, but if they were not available (the usual case in production), it
7764 was lost. Now it is written to syslog before the two lines that record the
7765 failures to open the logs.
7767 65. Users' Exim filters run in subprocesses under the user's uid. It is
7768 possible for a "deliver" command or an alias in a "personal" command to
7769 provoke an address rewrite. If logging of address rewriting is configured,
7770 this fails because the process is not running as root or exim. There may be
7771 a better way of dealing with this, but for the moment (because 4.30 needs
7772 to be released), I have disabled address rewrite logging when running a
7773 filter in a non-root, non-exim process.
7779 1. The buildconfig auxiliary program wasn't quoting the value set for
7780 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7781 not defined. This bug was masked in 4.22 by the effect that was fixed in
7784 2. Some messages that were rejected after a message id was allocated were
7785 shown as "incomplete" by exigrep. It no longer does this for messages that
7786 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7788 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7789 have allow_domain_literals set, the ID did not get logged in the <= line.
7790 Domain literals are now always recognized in Message-ID: header lines.
7792 4. The first argument for a ${extract expansion item is the key name or field
7793 number. Leading and trailing spaces in this item were not being ignored,
7794 causing some misleading effects.
7796 5. When deliver_drop_privilege was set, single queue runner processes started
7797 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7798 same command in the process it spins off) were not dropping privilege.
7800 6. When the daemon running as "exim" started a queue runner, it always
7801 re-executed Exim in the spun-off process. This is a waste of effort when
7802 deliver_drop_privilege is set. The new process now just calls the
7803 queue-runner function directly.
7809 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7812 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7813 ignored. Though the use of -oP was forcing the writing of a pid file, it
7814 was always written to the default place.
7816 3. If the message "no IP address found for host xxxx" is generated during
7817 incoming verification, it is now followed by identification of the incoming
7818 connection (so you can more easily find what provoked it).
7820 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7822 5. Added some features to "harden" Exim a bit more against certain attacks:
7824 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7825 be put in Local/Makefile. This is like the never_users runtime option,
7826 but it cannot be overridden. The default setting is "root".
7828 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7829 prefix string with which any file named in a -C command line option
7832 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7833 is retained for -C and -D only if the caller of Exim is root. Without
7834 it, the exim user may also use -C and -D and retain privilege.
7836 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7837 command line option is disabled.
7839 6. Macro names set by the -D option must start with an upper case letter, just
7840 like macro names defined in the configuration file.
7842 7. Added "dereference=" facility to LDAP.
7844 8. Two instances of the typo "uknown" in the source files are fixed.
7846 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7847 the Configure-Makefile script screwed up while processing it.
7849 10. Incorporated PCRE 4.4.
7851 11. The SMTP synchronization check was not operating right at the start of an
7852 SMTP session. For example, it could not catch a HELO sent before the client
7853 waited for the greeting. There is now a check for outstanding input at the
7854 point when the greeting is written. Because of the duplex, asynchronous
7855 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7856 way, but not yet received, when the check is performed.
7858 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7859 on TCP/IP sockets, because this apparently causes some broken clients to
7862 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7863 unchanged) from the Cygwin maintainer.
7865 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7866 was supported instead of testing for mbx. Effectively a typo.
7868 15. The spa authenticator server code was not checking that the input it
7869 received was valid base64.
7871 16. The debug output line for the "set" modifier in ACLs was not showing the
7872 name of the variable that was being set.
7874 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7876 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7877 lookup on its own. Something else was needed to trigger the lookup. For
7878 example, a match in host_lookup or the need for a host name in a host list.
7879 Now, if $sender_host_name is referenced and the host name has not yet been
7880 looked up, a lookup is performed. If the lookup fails, the variable remains
7881 empty, and $host_lookup_failed is set to "1".
7883 19. Added "eqi" as a case-independent comparison operator.
7885 20. The saslauthd authentication condition could segfault if neither service
7886 nor realm was specified.
7888 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7889 error message that was logged was misleading, and incoming SMTP
7890 connections were dropped. The message is now more accurate, and temporary
7891 errors are given to SMTP connections.
7893 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7894 (except RSET) with a 421 error, until QUIT is received. However, it was
7895 failing to send a response to QUIT.
7897 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7898 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7899 ACL is now run after the helo_try_verify_hosts code.
7901 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7902 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7903 case-independent, so other case variants are also recognized). Apparently
7904 some systems use these upper case variants.
7906 25. If more than two messages were waiting for the same host, and a transport
7907 filter was specified for the transport, Exim sent two messages over the
7908 same TCP/IP connection, and then failed with "socket operation on non-
7909 socket" when it tried to send the third.
7911 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7913 27. The extern definition of crypt16() in expand.c was not being excluded when
7914 the OS had its own crypt16() function.
7916 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7917 as a preferred synonym for return_size_limit, both as an option and as an
7920 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7922 30. Changed the default configuration ACL to relax the local part checking rule
7923 for addresses that are not in any local domains. For these addresses,
7924 slashes and pipe symbols are allowed within local parts, but the sequence
7925 /../ is explicitly forbidden.
7927 31. SPA server authentication was not clearing the challenge buffer before
7930 32. log_message in a "warn" ACL statement was writing to the reject log as
7931 well as to the main log, which contradicts the documentation and doesn't
7932 seem right (because no rejection is happening). So I have stopped it.
7934 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7935 However, I am unable to do any testing of this.
7937 34. Fixed an infelicity in the appendfile transport. When checking directories
7938 for a mailbox, to see if any needed to be created, it was accidentally
7939 using path names with one or more superfluous leading slashes; tracing
7940 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7942 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7943 contents are added to the log line that is written for every discarded
7944 recipient. (Previously a log_message setting was ignored.)
7946 36. The ${quote: operator now quotes the string if it is empty.
7948 37. The install script runs exim in order to find its version number. If for
7949 some reason other than non-existence or emptiness, which it checks, it
7950 could not run './exim', it was installing it with an empty version number,
7951 i.e. as "exim-". This error state is now caught, and the installation is
7954 38. An argument was missing from the function that creates an error message
7955 when Exim fails to connect to the socket for saslauthd authentication.
7956 This could cause Exim to crash, or give a corrupted message.
7958 39. Added isip, isip4, and isip6 to ${if conditions.
7960 40. The ACL variables $acl_xx are now saved with the message, and can be
7961 accessed later in routers, transports, and filters.
7963 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7964 strings in the file are not string-expanded.
7966 42. If a MAIL command specified a SIZE value that was too large to fit into an
7967 int variable, the check against message_size_limit failed. Such values are
7968 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7969 day this will have to be increased, but I don't think I want to be around
7970 when emails are that large.
7977 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7978 iconv() is not standard in FreeBSD.
7980 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7981 IPv6 enabled. The observed symptom was a segmentation fault on return from
7982 the function os_common_find_running_interfaces() in src/os.c.
7984 3. In the check_special_case() function in daemon.c I had used "errno" as an
7985 argument name, which causes warnings on some systems. This was basically a
7986 typo, since it was named "eno" in the comments!
7988 4. The code that waits for the clock to tick (at a resolution of some fraction
7989 of a second) so as to ensure message-id uniqueness was always waiting for
7990 at least one whole tick, when it could have waited for less. [This is
7991 almost certainly not relevant at current processor speeds, where it is
7992 unlikely to ever wait at all. But we try to future-proof.]
7994 5. The function that sleeps for a time interval that includes fractions of a
7995 second contained a race. It did not block SIGALRM between setting the
7996 timer, and suspending (a couple of lines later). If the interval was short
7997 and the sigsuspend() was delayed until after it had expired, the suspension
7998 never ended. On busy systems this could lead to processes getting stuck for
8001 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8002 process, before it forks any delivery processes. The open lookup caching
8003 mechanism meant that the open file or database connection was passed into
8004 the delivery process. The problem was that delivery processes always tidy
8005 up cached lookup data. This could cause a problem for the next delivery
8006 process started by the queue runner, because the external queue runner
8007 process does not know about the closure. So the next delivery process
8008 still has data in the lookup cache. In the case of a file lookup, there was
8009 no problem because closing a file descriptor in a subprocess doesn't affect
8010 the parent. However, if the lookup was caching a connection to a database,
8011 the connection was closed, and the second delivery process was likely to
8012 see errors such as "PGSQL: query failed: server closed the connection
8013 unexpectedly". The problem has been fixed by closing all cached lookups
8014 in a queue runner before running a delivery process.
8016 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8017 seem to have the "const" qualifier which it has on other OS. I've
8020 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8021 *of the same type* (client or server) with the same public name that an
8022 error should be diagnosed.
8024 9. When Exim looked up a host name for an IP address, but failed to find the
8025 original IP address when looking up the host name (a safety check), it
8026 output the message "<ip address> does not match any IP for NULL", which was
8027 confusing, to say the least. The bug was that the host name should have
8028 appeared instead of "NULL".
8030 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8031 user that is built into the binary, and the -C or -D options is used, root
8032 privilege is dropped before the configuration file is read. In addition,
8033 logging is switched to stderr instead of the normal log files. If the
8034 configuration then re-defines the Exim user, the unprivileged environment
8035 is probably not what is expected, so Exim logs a panic warning message (but
8038 However, if deliver_drop_privilege is set, the unprivileged state may well
8039 be exactly what is intended, so the warning has been cut out in that case,
8040 and Exim is allowed to try to write to its normal log files.
8046 1. smtp_return_error_details was not giving details for temporary sender
8047 or receiver verification errors.
8049 2. Diagnose a configuration error if two authenticators have the same public
8052 3. Exim used not to create the message log file for a message until the first
8053 delivery attempt. This could be confusing when incoming messages were held
8054 for policy or load reasons. The message log file is now created at the time
8055 the message is received, and an initial "Received" line is written to it.
8057 4. The automatically generated man page for command line options had a minor
8058 bug that caused no ill effects; however, a more serious problem was that
8059 the procedure for building the man page automatically didn't always
8060 operate. Consequently, release 4.20 contains an out-of-date version. This
8061 shouldn't happen again.
8063 5. When building Exim with embedded Perl support, the script that builds the
8064 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8065 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8067 6. The freeze_tell option was not being used for messages that were frozen on
8068 arrival, either by an ACL or by local_scan().
8070 7. Added the smtp_incomplete_transaction log selector.
8072 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8073 was accepting AUTH without a new EHLO.
8075 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8076 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8079 10. Logging of TCP/IP connections (when configured) now happens in the main
8080 daemon process instead of the child process, so that the TCP/IP connection
8081 count is more accurate (but it can never be perfect).
8083 11. The use of "drop" in a nested ACL was not being handled correctly in the
8084 outer ACL. Now, if condition failure induced by the nested "drop" causes
8085 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8086 or "require"), the connection is dropped.
8088 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8089 that yield "discard" can now be used with an "accept" or a "discard" verb,
8090 but an error is generated for any others (because I can't see a useful way
8091 to define what should happen).
8093 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8094 are now processed in the same way as lines in the Exim configuration file.
8095 In particular, continuation lines are supported.
8097 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8099 15. Added -ti meaning -t -i.
8101 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8102 domains, and warn by logging if others are found.
8104 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8105 returned from GIFCONF when Exim is trying to find the list of interfaces on
8106 a host. The code in os.c has been modified to copy each ifreq to an aligned
8107 structure in all cases.
8109 Also, in some cases, the returned ifreq's were being copied to a 'struct
8110 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8111 means the last couple of bytes of an IPv6 address could be chopped if the
8112 ifreq contained only a normal sockaddr (14 bytes storage).
8114 18. Named domain lists were not supported in the hosts_treat_as_local option.
8115 An entry such as +xxxx was not recognized, and was treated as a literal
8118 19. Ensure that header lines added by a DATA ACL are included in the reject log
8119 if the ACL subsequently rejects the message.
8121 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8122 MD5 (which is deprecated).
8124 21. When testing a filter file using -bf, Exim was writing a message when it
8125 took the sender from a "From " line in the message, but it was not doing so
8126 when it took $return_path from a Return-Path: header line. It now does.
8128 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8129 with a valid header line field name (a series of printing characters
8130 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8132 23. Changed "disc" in the source to "disk" to conform to the documentation and
8133 the book and for uniformity.
8135 24. Ignore Sendmail's -Ooption=value command line item.
8137 25. When execve() failed while trying to run a command in a pipe transport,
8138 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8139 could be confused with a return value of 69 from the command itself. This
8140 has been changed to 127, the value the shell returns if it is asked to run
8141 a non-existent command. The wording for the related log line suggests a
8142 non-existent command as the problem.
8144 26. If received_header_text expands to an empty string, do not add a Received:
8145 header line to the message. (Well, it adds a token one on the spool, but
8146 marks it "old" so that it doesn't get used or transmitted.)
8148 27. Installed eximstats 1.28 (addition of -nt option).
8150 28. There was no check for failure on the call to getsockname() in the daemon
8151 code. This can fail if there is a shortage of resources on the system, with
8152 ENOMEM, for example. A temporary error is now given on failure.
8154 29. Contrary to the C standard, it seems that in some environments, the
8155 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8156 program. Exim now does this explicitly; it affects the formatting of
8157 timestamps using strftime().
8159 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8160 complaints. I've now initialized all the variables, to avoid this.
8162 32. Header lines added by a system filter were not being "seen" during
8163 transport-time rewrites.
8165 33. The info_callback() function passed to OpenSSL is set up with type void
8166 (*)(SSL *, int, int), as described somewhere. However, when calling the
8167 function (actually a macro) that sets it up, the type void(*)() is
8168 expected. I've put in a cast to prevent warnings from picky compilers.
8170 34. If a DNS black list lookup found a CNAME record, but there were no A
8171 records associated with the domain it pointed at, Exim crashed.
8173 35. If a DNS black list lookup returned more than one A record, Exim ignored
8174 all but the first. It now scans all returned addresses if a particular IP
8175 value is being sought. In this situation, the contents of the
8176 $dnslist_value variable are a list of all the addresses, separated by a
8179 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8180 to accept a host name and all its aliases if the forward lookup for any of
8181 them yielded the IP address of the incoming connection. Now it accepts only
8182 those names whose forward lookup yields the correct IP address. Any other
8183 names are discarded. This closes a loophole whereby a rogue DNS
8184 administrator could create reverse DNS records to break through a
8185 wildcarded host restriction in an ACL.
8187 37. If a user filter or a system filter that ran in a subprocess used any of
8188 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8189 the wrong values were passed to the pipe command ($thisaddress had the
8190 value of $0, $0 had the value of $1, etc). This bug was introduced by
8191 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8193 38. Improved the line breaking for long SMTP error messages from ACLs.
8194 Previously, if there was no break point between 40 and 75 characters, Exim
8195 left the rest of the message alone. Two changes have been made: (a) I've
8196 reduced the minimum length to 35 characters; (b) if it can't find a break
8197 point between 35 and 75 characters, it looks ahead and uses the first one
8198 that it finds. This may give the occasional overlong line, but at least the
8199 remaining text gets split now.
8201 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8202 file descriptors might be low, and that setting 1000 would always raise it.
8203 It turns out that in some environments, the limit is already over 1000 and
8204 that lowering it causes trouble. So now Exim takes care not to decrease it.
8206 40. When delivering a message, the value of $return_path is set to $sender_
8207 address at the start of routing (routers may change the value). By an
8208 oversight, this default was not being set up when an address was tested by
8209 -bt or -bv, which affected the outcome if any router or filter referred to
8212 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8213 log only when "message" or "log_message" are set. However, if one of the
8214 conditions was an address verification, or a call to a nested ACL, the
8215 messages generated by the underlying test were being passed through. This
8216 no longer happens. The underlying message is available in $acl_verify_
8217 message for both "message" and "log_message" expansions, so it can be
8218 passed through if needed.
8220 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8221 new expansion $bh_ to give the encoded byte string without charset
8222 translation. Translation happens only if iconv() is available; HAVE_ICONV
8223 indicates this at build time. HEADERS_CHARSET gives the charset to
8224 translate to; headers_charset can change it in the configuration, and
8225 "headers charset" can change it in an individual filter file.
8227 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8228 that creates RFC 2047 encoded "words" labels them as that charset instead
8229 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8230 expansion operator; (ii) when Exim creates a From: line for a local
8231 message; (iii) when a header line is rewritten to include a "phrase" part.
8233 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8234 buggy, causing it to skip the first lines of messages whose message ID
8235 ended in 'D'. This would not have bitten before Exim release 4.14, because
8236 message IDs were unlikely to end in 'D' before then. The effect was to have
8237 incorrect size information for certain domains.
8239 45. #include "config.h" was missing at the start of the crypt16.c module. This
8240 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8243 46. If there was a timeout during a "random" callout check, Exim treated it as
8244 a failure of the random address, and carried on sending RSET and the real
8245 address. If the delay was just some slowness somewhere, the response to the
8246 original RCPT would be taken as a response to RSET and so on, causing
8247 mayhem of various kinds.
8249 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8250 when I implemented it. It didn't allow for the fact that some option values
8251 may legitimately be negative (e.g. size_addition), and it didn't even do
8252 the right test for positive values.
8254 48. Domain names in DNS records are case-independent. Exim always looks them up
8255 in lower case. Some resolvers return domain names in exactly the case they
8256 appear in the zone file, that is, they may contain uppercase letters. Not
8257 all resolvers do this - some return always lower case. Exim was treating a
8258 change of case by a resolver as a change of domain, similar to a widening
8259 of a domain abbreviation. This triggered its re-routing code and so it was
8260 trying to route what was effectively the same domain again. This normally
8261 caused routing to fail (because the router wouldn't handle the domain
8262 twice). Now Exim checks for this case specially, and just changes the
8263 casing of the domain that it ultimately uses when it transmits the message
8266 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8269 50. If a filter generated a file delivery with a non-absolute name (possible if
8270 no home directory exists for the router), the forbid_file option was not
8273 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8274 the existing equality matching.
8276 52. Exim was using ints instead of ino_t variables in some places where it was
8277 dealing with inode numbers.
8279 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8280 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8281 called TMPDIR, and if it finds it is different, it changes its value.
8283 54. The smtp_printf() function is now made available to local_scan() so
8284 additional output lines can be written before returning. There is also an
8285 smtp_fflush() function to enable the detection of a dropped connection.
8286 The variables smtp_input and smtp_batched_input are exported to
8289 55. Changed the default runtime configuration: the message "Unknown user"
8290 has been removed from the ACL, and instead placed on the localuser router,
8291 using the cannot_route_message feature. This means that any verification
8292 failures that generate their own messages won't get overridden. Similarly,
8293 the "Unrouteable address" message that was in the ACL for unverifiable
8294 relay addresses has also been removed.
8296 56. Added hosts_avoid_esmtp to the smtp transport.
8298 57. The exicyclog script was not checking for the esoteric option
8299 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8300 will work only if exicyclog is run under the appropriate euid.
8302 58. Following a discussion on the list, the rules by which Exim recognises line
8303 endings on incoming messages have been changed. The -dropcr and drop_cr
8304 options are now no-ops, retained only for backwards compatibility. The
8305 following line terminators are recognized: LF CRLF CR. However, special
8306 processing applies to CR:
8308 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8309 nor a local message in the state where . is a terminator.
8311 (ii) If a bare CR is encountered in a header line, an extra space is added
8312 after the line terminator so as not to end the header. The reasoning
8313 behind this is that bare CRs in header lines are most likely either
8314 to be mistakes, or people trying to play silly games.
8316 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8317 was being incorrectly given as 18 bytes larger than it should have been.
8318 This is a VOB (very old bug).
8320 60. This may never have affected anything current, but just in case it has:
8321 When the local host is found other than at the start of a list of hosts,
8322 the local host, those with the same MX, and any that follow, are discarded.
8323 When the list in question was part of a longer list of hosts, the following
8324 hosts (not currently being processed) were also being discarded. This no
8325 longer happens. I'm not sure if this situation could ever has previously
8328 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8331 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8332 header. This is something that is recommended in a new Internet Draft, and
8333 is something that is documented as being done by Sendmail. There are two
8334 possible values. For messages generated by the autoreply transport, Exim
8337 Auto-Submitted: auto-replied
8339 whereas for all other generated messages (e.g. bounces) it adds
8341 Auto-Submitted: auto-generated
8343 63. The "personal" condition in filters now includes a test for the
8344 Auto-Submitted: header. If it contains the string "auto-" the message it
8345 not considered personal.
8347 64. Added rcpt_include_affixes as a generic transport option.
8349 65. Added queue_only_override (default true).
8351 66. Added the syslog_duplication option.
8353 67. If what should have been the first header line of a message consisted of
8354 a space followed by a colon, Exim was mis-interpreting it as a header line.
8355 It isn't of course - it is syntactically invalid and should therefore be
8356 treated as the start of the message body. The misbehaviour could have
8357 caused a number of strange effects, including loss of data in subsequent
8358 header lines, and spool format errors.
8360 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8361 client host had authenticated. This control can now be exercised by an ACL
8362 for more flexibility.
8364 69. By default, callouts do not happen when testing with -bh. There is now a
8365 variant, -bhc, which does actually run the callout code, including
8366 consulting and updating the callout cache.
8368 70. Added support for saslauthd authentication, courtesy of Alexander
8371 71. If statvfs() failed on the spool or log directories while checking their
8372 size for availability, Exim confusingly gave the error "space shortage".
8373 Furthermore, in debugging mode it crashed with a floating point exception.
8374 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8375 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8376 serious problem, Exim now writes to the main and panic logs when this
8377 happens, with details of the failure. It then refuses to accept the
8378 incoming message, giving the message "spool directory problem" or "log
8379 directory problem" with a 421 code for SMTP messages.
8381 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8382 0, 1, and 2 exist, because some OS complain for execs without them (see
8383 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8384 descriptors. However, the code omitted to check that the open succeeded,
8385 causing mysterious errors if for some reason the permissions on /dev/null
8386 got screwed. Now Exim writes a message to the main and panic logs, and
8387 bombs out if it can't open /dev/null.
8389 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8390 interact so that it is all more flexible. It is supposed to remain
8391 backwards compatible. Also added extra_local_interfaces.
8393 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8394 to bomb out with an assertion failure - to the client this appears as a
8395 connection drop. This problem occurs in the part of the code that was taken
8396 from the Samba project. Fortunately, the assertion is in a very simple
8397 function, so I have fixed this by reproducing the function inline in the
8398 one place where it is called, and arranging for authentication to fail
8399 instead of killing the process with assert().
8401 75. The SPA client code was not working when the server requested OEM rather
8402 than Unicode encoding.
8404 76. Added code to make require_files with a specific uid setting more usable in
8405 the case where statting the file as root fails - usually a non-root-mounted
8406 NFS file system. When this happens and the failure is EACCES, Exim now
8407 forks a subprocess and does the per-uid checking as the relevant uid.
8409 77. Added process_log_path.
8411 78. If log_file_path was not explicitly set, a setting of check_log_space or
8412 check_log_inodes was ignored.
8414 79. If a space check for the spool or log partitions fails, the incident is now
8415 logged. Of course, in the latter case the data may get lost...
8417 80. Added the %p formatting code to string_format() so that it can be used to
8418 print addresses in debug_print(). Adjusted all the address printing in the
8419 debugging in store.c to use %p rather than %d.
8421 81. There was a concern that a line of code in smtp_in.c could overflow a
8422 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8423 initially expressed, the concern was not well-founded, because trailing
8424 spaces are removed early. However, if the trailing spaces were followed by
8425 a NULL, they did not get removed, so the overflow was possible. Two fixes
8428 (a) I re-wrote the offending code in a cleaner fashion.
8429 (b) If an incoming SMTP command contains a NULL character, it is rejected
8432 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8433 runs initgroups(), so that if the Exim user is in any additional groups,
8434 they will be used during message reception.
8440 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob