1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
8 JH/01 Support list of dkim results in the dkim_status ACL condition, making
9 it more usable in the data ACL.
11 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
12 Previously This was only logged, on the assumption that errors would be
13 seen for a previous fflush(). However, a fuse filesystem has been
14 reported as showing this an error for the fclose(). The spool is now in
15 an uncertain state, and we have logged and responded acceptance. Change
16 this to respond with a temp-reject, wipe spoolfiles, and log the error
19 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
20 during a recipient verify callout, a QUIT command was attempted on the
21 now-closed callout channel, causing a paniclog entry.
23 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
24 a connection_reject log_selector, under tls_on_connect. Previously
25 with this combination, when the connect ACL rejected, a spurious
26 paniclog entry was made.
28 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
29 of loadbalancer-detection for resumption, in 4.96 - which tries to
30 use the EHLO response. SMTPS does not have one at the time it is starting
31 TLS. Change the default for the smtp transport host_name_extract option
32 to be a static string, for TLS-on-connect cases; meaning that resumption
33 will always be attempted (unless deliberately overriden).
35 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
36 chunk-separator specification. This was broken by hardening introduced
39 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
40 included the -H with the id; this also messed up exiqgrep.
42 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
43 was not properly skipped and empty elements would cause mis-parsing.
44 Tighten parsing of DKIM header records. Previously, all but lowercase
45 alpha chars would be ignored in potential tag names.
47 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
48 being searched. Previously we only had one for IPv4 addresses. Per the
49 documentation, the error results by default in a no-match result for the
50 list. It is logged if the unknown_in_list log_selector is used.
52 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
53 the routing operation. Previously it would silently stop routing the
56 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
57 info-request event close in time to a scheduled run timer could result in
58 the latter being missed, and no further queue scheduled runs being
59 initiated. This ouwld be more likely on high-load systems.
61 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
62 LF-only mode (as detected from the first header line). Previously we did
63 accept that in (normal) CRLF mode; this has been raised as a possible
64 attack scenario (under the name "smtp smuggling").
66 JH/13 Add an fdatasync call for the received message data file in spool, before
67 loggging reception and sending the SMTP ack. Previously we only flushed
68 the stdio buffer so there was still the possibility of a disk error.
70 JH/14 Bug 3061: Avoid a split log line when trtying to rewrite a malformed
71 address. Previously, for the last address in a header line (commonly
72 there is only one) the terminating newline was part of the logged
75 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
76 header, when parsing for address-qualification. Previously one was only
77 written if there were rewrite rules.
79 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
82 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
83 the multiple-queue-runners facility for 4.97 broking this, giving only
84 a one-time run of the queue.
90 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
91 SMTP connection" log lines.
93 JH/02 Option default value updates:
94 - queue_fast_ramp (main) true (was false)
95 - remote_max_parallel (main) 4 (was 2)
97 JH/03 Cache static regex pattern compilations, for use by ACLs.
99 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
100 Make the rewrite never match and keep the logging. Trust the
101 admin to be using verify=header-syntax (to actually reject the message).
103 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
104 (under Linux) we watch the dir containing the final file; previously
105 it would be the dir with the first symlink. We still do not monitor
108 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
109 dn_expand() is happy to pass them through.
111 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
112 the file with the proof had an unchanged name, the new proof(s) were
113 loaded on top of the old ones (and nover used; the old ones were stapled).
115 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
116 more than one message arrived in a single connection a reference from
117 the earlier message could be re-used. Often a sigsegv resulted.
118 These variables were introduced in Exim 4.87.
119 Debug help from Graeme Fowler.
121 JH/09 Fix ${filter } for conditions that modify $value. Previously the
122 modified version would be used in construction the result, and a memory
125 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
126 Find and fix by Jasen Betts.
128 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
129 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
130 the systemwide configuration to override the Exim config.
132 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
133 API changes in libopendmarc.
135 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
136 pid 1, in the normal "background daemon" mode, having to drop process-
137 group leadership also lost track of needing to create listener sockets.
139 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
140 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
142 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
143 a capture group which obtained no text (eg. "(abc)*" matching zero
144 occurrences) could cause a segfault if the corresponding $<n> was
147 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
148 included a close-brace character (eg. it itself used an expansion) an
151 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
152 starting TLS. Previously it was after, meaning that attackers on such
153 ports had to be screened using the host_reject_connection main config
154 option. The new sequence aligns better with the STARTTLS behaviour, and
155 permits defences against crypto-processing load attacks, even though it
156 is strictly an incompatible change.
157 Also, avoid sending any SMTP fail response for either the connect ACL
158 or host_reject_connection, for TLS-on-connect ports.
160 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
161 Previously this was not permitted, but it makes reasonable sense.
162 While there, restore a restriction on using it from a connect ACL; given
163 the change JH/16 it could only return false (and before 4.91 was not
166 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
167 was exactly sized compared to the log buffer, a crash occurred with the
168 misleading message "bad memory reference; pool not found".
169 Found and traced by Jasen Betts.
171 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
172 dns_again_means_nonexist included an element causing a DNS lookup which
173 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
174 included (though probably not limited to) a process crash from stack
175 memory limit, or from excessive open files. Replace this with a paniclog
176 whine (as this is likely a configuration error), and returning
179 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
180 this always failed, probably leading to the usual downgrade to in-clear
183 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
184 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
185 to not checking that list for these lookups.
187 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
190 JH/23 Fix crash in string expansions. Previously, if an empty variable was
191 immediately followed by an expansion operator, a null-indirection read
192 was done, killing the process.
194 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
195 include an SMTP response string which is longer than that supported
196 by the delivering transport. Alleviate by wrapping such lines before
199 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
200 chars (RFC limit). Previously a limit of 12 items was made, which with
201 a not-impossible References: in the message being bounced could still
202 be over-large and get stopped in the transport.
204 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
205 close. Previously a bare socket close was done.
207 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
210 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
211 message being considered for delivery was already being handled by
212 another process, and having an SMTP connection already open, the function
213 to close it tried to use an uninitialized variable. This would afftect
214 high-volume sites more, especially when running mailing-list-style loads.
215 Pollution of logs was the major effect, as the other process delivered
216 the message. Found and partly investigated by Graeme Fowler.
218 JH/29 Change format of the internal ID used for message identification. The old
219 version only supported 31 bits for a PID element; the new 64 (on systems
220 which can use Base-62 encoding, which is all currently supported ones
221 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
222 and must use Base-36). The new ID is 23 characters rather than 16, and is
223 visible in various places - notably logs, message headers, and spool file
224 names. Various of the ancillary utilities also have to know the format.
225 As well as the expanded PID portion, the sub-second part of the time
226 recorded in the ID is expanded to support finer precision. Theoretically
227 this permits a receive rate from a single comms channel of better than the
229 The major timestamp part of the ID is not changed; at 6 characters it is
230 usable until about year 3700.
231 Updating from previously releases is fully supported: old-format spool
232 files are still usable, and the utilities support both formats. New
233 message will use the new format. The one hints-DB file type which uses
234 message-IDs (the transport wait- DB) will be discarded if an old-format ID
235 is seen; new ones will be built with only new-format IDs.
236 Optionally, a utility can be used to convert spool files from old to new,
237 but this is only an efficiency measure not a requirement for operation
238 Downgrading from new to old requires running a provided utility, having
239 first stopped all operations. This will convert any spool files from new
240 back to old (losing time-precision and PID information) and remove any
241 wait- hints databases.
243 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
244 we treated them as item separators when parsing for a list item, but they
245 need to be protected by the doublequotes. While there, add handling for
248 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
249 Found and fixed by Jasen Betts. No testcase for this as my usual text
250 editor insists on emitting only valid UTF-8.
252 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
253 a null-indirection SIGSEGV for the receive process.
255 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
256 -bh use. Internal checking would spot this and take a panic.
258 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
259 In 4.96 this would expand to empty.
261 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
262 certificate. Find and fix by Andreas Metzler.
264 JH/36 Add ARC info to DMARC hostory records.
266 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
267 or fakedefer. Previously the sender could discover that the message
268 had in fact been accepted.
270 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
271 sequences. Previously the input was not noted as being tainted; notably
272 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
273 bad coding of authenticators.
275 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
276 and ${tr...}. Found and diagnosed by Heiko Schlichting.
278 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
279 could be triggered by externally-supplied input. Found by Trend Micro.
282 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
283 be triggered by externally-controlled input. Found by Trend Micro.
286 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
287 be triggered by externally-controlled input. Found by Trend Micro.
290 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
291 Make the rewrite never match and keep the logging. Trust the
292 admin to be using verify=header-syntax (to actually reject the message).
294 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
297 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
303 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
304 after reception to before a subsequent reception. This should
305 mean slightly faster delivery, and also confirmation of reception
308 JH/02 Move from using the pcre library to pcre2. The former is no longer
309 being developed or supported (by the original developer).
311 JH/03 Constification work in the filters module required a major version
312 bump for the local-scan API. Specifically, the "headers_charset"
313 global which is visible via the API is now const and may therefore
314 not be modified by local-scan code.
316 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
317 sendfile() didi not account for the way the ClamAV driver code called it.
319 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
320 time check was being done for every character; replace that with one
323 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
324 sent was prefixed with a length byte.
326 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
327 RFC 5321. Previously Dovecot (at least) would log errors during
330 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
331 in 4.61 without a reason logged. Binaries will be bigger, which might
332 matter on diskspace-constrained systems, but debug is easier.
334 JH/09 Fix macro-definition during "-be" expansion testing. The move to
335 write-protected store for macros had not accounted for these runtime
336 additions; fix by removing this protection for "-be" mode.
338 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
339 handing out large-numbered file descriptors, violating the usual Unix
340 assumption (and required by Posix) that the lowest possible number will be
341 allocated by the kernel when a new one is needed. In the daemon, and any
342 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
343 are not useable for FD_SET() [and hence select()] and overwrite the stack.
344 Assorted crashes happen.
346 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
347 main-section options or in a connect ACL, the value from the first ever
348 connection was never replaced for subsequent connections. Found by
351 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
352 though only once PCRE2 was introduced: the memory accounting used under
353 debug offset allocations by an int, giving a hard trap in early startup.
354 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
356 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
357 with underbars is given. The write-protection of configuration introduced
358 in 4.95 trapped when normalisation was applied to an option not needing
361 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
363 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
364 failing to close the certificates directory, every hour or any time it
367 JH/16 Debugging initiated by an ACL control now continues through into routing
368 and transport processes. Previously debugging stopped any time Exim
369 re-execs, or for processing a queued message.
371 JH/17 The "expand" debug selector now gives more detail, specifically on the
372 result of expansion operators and items.
374 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
375 bad comparison between the option value and the name of the file to
376 be included was done, and a mismatch was wrongly identified.
377 4.88 to 4.95 are affected.
379 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
381 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
382 supplied as the db file-pair basename. Previously, if a directory
383 path was given, for example via the autoreply "once" option, the DB
384 file.pag and file.dir files would be created in that directory's
387 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
388 "taint" log_selector. These were previously deprecated.
390 JH/22 Fix static address-list lookups to properly return the matched item.
391 Previously only the domain part was returned.
393 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
394 the call into OpenSSL to send a TLS Close was being repeated; this
395 resulted in the library waiting for the peer's Close. If that was never
396 sent we waited forever. Fix by tracking send calls.
398 JH/24 The ${run} expansion item now expands its command string elements after
399 splitting. Previously it was before; the new ordering makes handling
400 zero-length arguments simpler. The old ordering can be obtained by
401 appending a new option "preexpand", after a comma, to the "run".
403 JH/25 Taint-check exec arguments for transport-initiated external processes.
404 Previously, tainted values could be used. This affects "pipe", "lmtp" and
405 "queryprogram" transport, transport-filter, and ETRN commands.
406 The ${run} expansion is also affected: in "preexpand" mode no part of
407 the command line may be tainted, in default mode the executable name
410 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
411 the the facility was not passed across execs, and only the first message
412 passed over a connection could use BDAT; any further ones using DATA.
414 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
415 uses $sending_ip_address and an interface is specified.
416 Previously any use of the local address in the EHLO name disabled
417 PIPECONNECT, the common case being to use the rDNS of it.
419 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
420 resumption. Previously verify failed because no certificate status is
421 passed on the wire for the restarted session. Fix by using the recorded
422 ocsp status of the stored session for the new connection.
424 JH/29 TLS resumption: the key for session lookup in the client now includes
425 more info that a server could potentially use in configuring a TLS
426 session, avoiding oferring mismatching sessions to such a server.
427 Previously only the server IP was used.
429 JH/30 Fix string_copyn() for limit greater than actual string length.
430 Previously the copied amount was the limit, which could result in a
431 overlapping memcpy for newly allocated destination soon after a
432 source string shorter than the limit. Found/investigated by KM.
434 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
435 close; it may be needed for a subsequent connection. This caused a
436 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
438 JH/32 Fix CHUNKING for a second message on a connection when the first was
439 rejected. Previously we did not reset the chunking-offered state, and
440 erroneously rejected the BDAT command. Investigation help from
443 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
444 an empty address. Previously the expansion returned an error.
446 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
447 proxy. Previously these were misparsed, leading to paniclog entries.
453 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
454 related applications. Previously an "H" was used where available info
455 says that "M" should be, so change to match.
457 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
458 as arguments, so an implementation trying to copy these into a local
459 buffer was taking a taint-enforcement trap. Fix by using dynamically
460 created buffers. Similar fix for radius expansion condition.
462 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
463 reasonable, eg. to count headers. Fix by using dynamically created
464 buffers rather than a local. Do similar fixes for ACL actions "dcc",
465 "log_reject_target", "malware" and "spam"; the arguments are expanded
466 so could be handling tainted values.
468 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
469 broken the (no-op) support for this sendmail command. Restore it
470 to doing nothing, silently, and returning good status.
472 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
473 record path was given (or the default used) without a leading directory
474 path, an error occurred on trying to open it. Use the transport's working
477 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
478 transport. Previously it was the name on the DNS A-record; use instead
479 the head of the CNAME chain leading there (if there is one). This seems
480 to align better with RFC 6125.
482 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
483 smtp_accept_max_per_host allocated resources which were not released
484 when the limit was exceeded. This eventually crashed the daemon. Fix
485 by adding a release action in that path.
487 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
488 expanded; previously using tainted values was rejected. Fix by using
489 dynamically-created buffers.
491 JH/09 Relax restrictions on ACL verify condition needing access to message
492 headers. Previously they were only permitted in data and non-smtp ACLs;
493 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
494 not_blind, header_sender and header_names_ascii verification.
496 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
497 Previously a macro used one argument twice; when called with the
498 argument as an expression having side-effects, incorrect operation
499 resulted. Use an inlineable function.
501 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
502 held open for a verify callout. Previously this wan not accounted for
503 and a corrupt onward SMTP conversation resulted.
505 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
506 Previously they were embedded naively in the constructed address; when
507 needed, strip the quoting and quote the entire local_part.
508 Also make the inbound_srs expansion condition handle quoting.
510 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
511 excluded, not matching the documentation.
513 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
514 was given for the sqlite_dbfile a trap resulted.
516 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
517 "name" argument resulted in a trap. There is no reason to disallow such;
518 this was a coding error.
520 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
521 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
522 spent suspended, ignoring the POSIX definition. Previously we assumed
523 it did and a constant offset from real time could be used as a correction.
524 Change to using the same clock source for the start-of-message and the
525 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
526 exists, just to get a clock slightly more aligned to reality.
528 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
529 RFC says it is optional some validators care. The missing char was not
530 intended but triggered by a line-wrap alignment. Discovery and fix by
531 Guillaume Outters, hacked on by JH.
533 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
534 name being quoted was tainted a trap would be taken. Fix by using
535 dynamically created buffers. The routine could have been called by a
536 rewrite with the "h" flag, by using the "-F" command-line option, or
537 by using a "name=" option on a control=submission ACL modifier.
539 JH/19 SPF: change the Authentication-Results expansion component to give
540 smtp.helo when the sender domain is empty. Previously it gave
543 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
544 not in 127.0.0.0/8 to help in spotting list domains taken over by a
545 domain-parking registrar.
547 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
548 Previously when a whitespace character was specified it was not inserted
549 after removing the newline.
551 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
552 the domain part of the recipient address. This overrides any tls_sni
553 option set, which was previously used.
555 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
558 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
559 is_tainted() had an off-by-one error in the overenthusiastic direction.
560 Find and fix by Gavan. Although NetBSD is not a supported platform for
561 4.94 this bug could affect other platforms.
563 PP/01 Fix default prime selection to be consistent.
564 One path used ike23 still, instead of exim.dev.20160529.3; now both
565 execution flows will use the same DH primes (currently
566 exim.dev.20160529.3).
568 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
569 option in smtp transport, to match the documentation. Previously
570 verification was not being done in some cases where it should have been.
572 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
573 than one server was defined and depending on the platform memory layout
574 details, an internal consistency trap could be hit while walking the list
577 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
578 files. The value is used by the authresults expansion item. Previously
579 if this was used in a router or transport, a crash could result.
581 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
582 have a sufficient incidence of EINTR returns from select that an
583 interaction with other operations done by the main daemon loop exposed
584 a bug in the error-handling. This was benign apart from the log
587 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
588 for consistency with delivered "=>" and failed "**" lines. While we're
589 there, handle PRX and TFO.
591 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
592 applied. This resulted, if any header-line rewrite rules were configured,
593 in a panic-log triggerable by sending a message with a long address in
594 a header. Fix by increasing the arbitrary limit to larger than a single
595 (dewrapped) 5322 header line maximum size.
597 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
598 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
599 RFC 6648 which deprecates X- options in protocols as a general practice.
600 Changeover between the implementations is handled by the mechanisms
603 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
604 a remote which uses callout/hold. Previously the local was queued.
606 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
609 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
610 log line. The asterisk is now consistently appended to the remote IP
611 (and port, if given), and will also be provided on defer and fail log
612 lines. Previously it could be placed on the local IP if that was being
613 logged, and was only provided on delivery lines.
615 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
617 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
618 authenticator client_send option. Previously the next char, after a pair
619 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
620 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
621 documentation. There is still no way to get a leading ^ immediately
622 after a NUL (ie. for the password of a PLAIN method authenticator.
624 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
625 files. For bad sizes read, delete the record and whine to paniclog.
627 JH/38 When logging an AUTH failure, as server, do not include sensitive
628 information. Previously, the credentials would be included if given
629 as part of the AUTH command line and an ACL denied authentication.
631 JH/39 Bug 2691: fix $local_part_data. When the matching list element
632 referred to a file, bad data was returned. This likely also affected
635 JH/40 The gsasl authenticator now supports caching of the salted password
636 generated by the client-side implementation. This required the addition
637 of a new variable: $auth4.
639 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
640 left undeleted; the attempt to re-create it then failed - resulting in
641 the usual "SIGHUP tp have daemon reload configuration" to not work.
642 This affected any platform not supporting "abstract" Unix-domain
643 sockets (i.e. not Linux).
645 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
646 recipients" response to RCPT in a later response, with a 250. The
647 previous coding assumed this would not happen, and under PIPELINING
648 would result in both lost and duplicate recipients for a message.
650 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
651 Previously the weighting was incorrectly applied. Similar fix for socks
652 proxies. Found and fixed by Heiko Schlichting.
654 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
655 not handle sub-lists included using the +namedlist syntax. While
656 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
657 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
660 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
661 Previously the permanent pool was used, so the sore could not be freed.
662 This meant a connection with many messages would use continually-growing
665 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
666 per-pool so as not to waste too much space. Previously a constant size
667 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
668 DOS attacks harder. The cost is wasted memory use in the larger blocks.
670 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
671 same space repeatedly, and a smaller process footprint.
673 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
674 for GnuTLS. Previously the name started "%s" which, while not a bug,
675 looked as if if might be one.
677 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
678 "continued connection") make the $proxy_* variables available. Previously
679 the information was not passed across the exec() call for subsequent
680 transport executions. This also mean that the log lines for the
681 messages can show the proxy information.
683 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
684 receive time. With modern systems the difference is significant.
685 The historical behaviour can be restored by disabling (a new) log_selector
686 "queue_time_exclusive".
688 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
689 content) were specifically tested for. Now, also cover expansions
690 resulting in ACL names and inline ACL content.
692 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
693 making it unusable in complex expressions.
695 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
696 fail with a taint-check on the spoolfile name, and leave the message
699 HS/01 Enforce absolute PID file path name.
701 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
703 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
705 PP/02 Bug 2643: Correct TLS DH constants.
706 A missing NUL termination in our code-generation tool had led to some
707 incorrect Diffie-Hellman constants in the Exim source.
708 Reported by kylon94, code-gen tool fix by Simon Arlott.
710 PP/03 Impose security length checks on various command-line options.
711 Fixes CVE-2020-SPRSS reported by Qualys.
713 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
714 better. Reported by Qualys.
716 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
717 providing a particularly obnoxious sender full name.
720 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
722 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
725 PP/08 Change default for recipients_max from unlimited to 50,000.
727 PP/09 Fix security issue with too many recipients on a message (to remove a
728 known security problem if someone does set recipients_max to unlimited,
729 or if local additions add to the recipient list).
730 Fixes CVE-2020-RCPTL reported by Qualys.
732 PP/10 Fix security issue in SMTP verb option parsing
733 Fixes CVE-2020-EXOPT reported by Qualys.
735 PP/11 Fix security issue in BDAT state confusion.
736 Ensure we reset known-good where we know we need to not be reading BDAT
737 data, as a general case fix, and move the places where we switch to BDAT
738 mode until after various protocol state checks.
739 Fixes CVE-2020-BDATA reported by Qualys.
741 HS/03 Die on "/../" in msglog file names
743 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
744 the Exim runtime user are allowed to create files.
746 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
749 QS/03 When reading the output from interpreted forward files we do not
750 pass the pipe between the parent and the interpreting process to
751 executed child processes (if any).
753 QS/04 Always die if requested from internal logging, even is logging is
756 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
757 the API; compilation noo longer completes with DMARC support included.
758 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
759 been reported on other platforms.
761 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
763 JH/56 Make the majority of info read from config files readonly, for defence-in-
764 depth against exploits. Suggestion by Qualys.
765 Not supported on Solaris 10.
767 JH/57 Fix control=fakreject for a custom message containing tainted data.
768 Previously this resulted in a log complaint, due to a re-expansion present
769 since fakereject was originally introduced.
771 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
772 modifier was given, a loop resulted.
774 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
775 pipelined SMTP command followed the BDAT LAST then it would be
776 incorrectly treated as part of the message body, causing a verification
779 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
780 require looser validation rules than those for 821-level addresses,
781 which only permit IP addresses.
787 JH/01 Avoid costly startup code when not strictly needed. This reduces time
788 for some exim process initialisations. It does mean that the logging
789 of TLS configuration problems is only done for the daemon startup.
791 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
793 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
794 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
797 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
798 DKIM signing is being done. Previously a transport_filter would always
799 disable CHUNKING, falling back to traditional DATA.
801 JH/05 Regard command-line recipients as tainted.
803 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
805 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
806 PAM library frees one of the arguments given to it, despite the
807 documentation. Therefore a plain malloc must be used.
809 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
810 on-stack buffers were used, resulting in a taint trap when DSN information
811 copied from a received message was written into the buffer.
813 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
814 the ordering of its ARC headers. This caused a crash.
816 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
817 a new record was being constructed with information from the peer, a trap
820 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
821 installation would get error messages from DMARC verify, when it hit the
822 nonexistent file indicated by the default. Distros wanting DMARC enabled
823 should both provide the file and set the option.
824 Also enforce no DMARC verification for command-line sourced messages.
826 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
827 could, depending on the platform, hang at the STARTTLS response.
829 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
830 message on a connection. Previously if one message had ARC headers and
831 the following one did not, a crash could result when adding an
832 Authentication-Results: header.
834 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
835 Exim main code and Exim-related utities. The introduction of taint
836 tracking also did many adjustments to string handling. Since then, eximon
837 frequently terminated with an assert failure.
839 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
840 check for 452 responses. This slightly helps the inefficieny of doing
841 a large alias-expansion into a recipient-limited target. The max_rcpt
842 transport option still applies (and at the current default, will override
843 the new feature). The check is done for either cause of synch, and forces
844 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
845 connection. The new facility is not tunable at this time.
847 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
848 library live data was being used, so the results became garbage. Make
849 copies while it is still usable.
851 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
852 on delivery deferred (==) and failed (**) lines (if a delivery was
853 attemtped). Previously it was only on completion (=>) lines.
855 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
856 for the expansion of the server_scram_iter and server_scram_salt options.
858 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
859 are now specifically given a NO_DATA response without hitting the system
860 resolver. The library goes on to do the now-standard TXT lookup.
861 Use of dnsdb lookups is not affected.
863 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
864 only retrieve the errormessage once. Previously two calls to dlerror()
865 were used, and the second one (for mainlog/paniclog) retrieved null
868 JH/20 Taint checking: disallow use of tainted data for
869 - the appendfile transport file and directory options
870 - the pipe transport command
871 - the autoreply transport file, log and once options
872 - file names used by the redirect router (including filter files)
874 - paths used by single-key lookups
875 Previously this was permitted.
877 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
878 adjusted the size of a major service buffer; this failed because the
879 buffer was in use at the time. Change to a compile-time increase in the
880 buffer size, when this authenticator is compiled into exim.
882 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
883 previous fast-mode was untenable in the face of glibs using mmap to
884 support larger malloc requests.
886 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
887 New values supported, if defined on system where compiled:
888 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
889 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
891 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
892 running a limited number of proceses in parallel, a benefit is gained. The
893 amount varies with the platform hardware and load. The use of the option
894 queue_run_in_order means we cannot do this, as ordering becomes
897 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
898 had introduced a string-copy (for ensuring NUL-termination) which was not
899 appropriate for that case, which can include embedded NUL bytes in the
900 block of data. Investigation showed the copy to actually be needless, the
901 data being length-specified.
903 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
904 done during a receiving connection, and both used TLS, global info was
905 used rather than per-connection info for tracking the state of data
906 queued for transmission. This could result in a connection hang.
908 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
909 Previously, when delivering serveral messages down a single connection
910 only the first would provide a SIZE. This was due to the size information
911 not being properly tracked.
913 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
914 TAI (at 37 seconds currently), pretend to be in UTC for time-related
915 expansion and logging. Previously, spurious values such as a future
916 minute could be seen.
918 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
919 it could crash from a null-deref. This could also affect the
920 ${addresses: } operator and ${readsock } item.
922 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
923 message following a mime one, the variable was not reset.
925 JH/30 When an pipelined-connect fails at the first response, assume incorrect
926 cached capability (perhaps the peer reneged?) and immediately retry in
929 JH/31 Fix spurious detection of timeout while writing to transport filter.
931 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
932 an attempt to copy the string was made before checking it.
934 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
935 taint of the lookup key was maintained; we now regard the presence in the
936 filesystem as sufficient validation.
938 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
939 argument is supplied.
941 JH/35 The dsearch lookup now requires that the directory is an absolute path.
942 Previously this was not checked, and nonempty relative paths made an
943 access under Exim's current working directory.
945 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
946 Previously no event was raised.
948 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
949 parameter supplied by the sender MAIL FROM command. Previously it was
950 ignored, and only the check_spool_space option value for the required
953 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
954 the size of the signing public-key. Previously it was instead giving
955 the size of the signature hash.
957 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
958 the default. See the (new) dkim_verify_min_keysizes option.
960 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
961 and an ACL use a lookup for checking either the local_part or domain,
962 stale data could be accessed. Ensure that variable references are
963 dropped between messages.
965 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
966 by the client was not checked as pointing within response data before
967 being used. A malicious client could thus cause an out-of-bounds read and
968 possibly gain authentication. Fix by adding the check.
970 JH/42 Internationalisation: change the default for downconversion in the smtp
971 transport to be "if needed". Previously it was "as previously set" for
972 the message, which usually meant "if needed" for message-submission but
973 "no" for everything else. However, MTAs have been seen using SMTPUTF8
974 even when the envelope addresses did not need it, resulting in forwarding
975 failures to non-supporting MTAs. A downconvert in such cases will be
976 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
977 transport. The change does mean that addresses needing conversion will
978 be converted when previously a delivery failure would occur.
980 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
981 response was received it would be used unchecked in a fail-DSN, violating
982 standards on line-length limits. Truncate if needed.
984 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
985 doesn't work. (Additionally add a new main config option to configure the
992 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
993 side, to decode a TLS 1.3 packet capture.
995 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
996 Previously the default library behaviour applied, sending two, each in
999 JH/03 Debug output for ACL now gives the config file name and line number for
1002 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1004 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1006 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1007 buffer overrun for (non-chunking) other transports.
1009 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1010 TLS1.3, means that a server rejecting a client certificate is not visible
1011 to the client until the first read of encrypted data (typically the
1012 response to EHLO). Add detection for that case and treat it as a failed
1013 TLS connection attempt, so that the normal retry-in-clear can work (if
1014 suitably configured).
1016 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1017 and/or domain. Found and fixed by Jason Betts.
1019 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1020 configuration). If a CNAME target was not a wellformed name pattern, a
1023 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1024 the OS reports them interleaved with other addresses.
1026 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1027 used both for input and for a verify callout, both encrypted, SMTP
1028 responses being sent by the server could be lost. This resulted in
1029 dropped connections and sometimes bounces generated by a peer sending
1032 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1033 string. Previously it was possible to cause undefined behaviour in a
1034 library routine (usually a crash). Found by "zerons".
1036 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1039 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1040 API was removed, so update to use the newer ones.
1042 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1043 any timeout set, is taking a long time. Previously we would hang on to a
1044 rotated logfile "forever" if the input was arriving with long gaps
1045 (a previous attempt to fix addressed lack, for a long time, of initial
1048 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1049 shared (NFS) environment. The length of the tempfile name is now
1050 4 + 16 ("hdr.$message_exim_id") which might break on file
1051 systems which restrict the file name length to lower values.
1052 (It was "hdr.$pid".)
1054 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1055 shared (NFS) environment.
1057 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1058 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1061 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1062 on some platforms for bit 31.
1064 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1065 to changes apparently associated with TLS1.3 handling some of the APIs
1066 previously used were either nonfunctional or inappropriate. Strings
1067 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1068 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1069 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1070 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1071 and the use of specific cipher names in the encrypted= ACL condition.
1073 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1075 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1076 verification result was not updated unless hosts_require_ocsp applied.
1078 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1079 queue_list_requires_admin set to false, non-admin users were denied the
1082 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1083 directory-of-certs mode. Previously they were advertised despite the
1086 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1087 A single TCP connection by a client will now hold a TLS connection open
1088 for multiple message deliveries, by default. Previously the default was to
1091 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1092 default. If built with the facility, DANE will be used. The facility
1093 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1095 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1096 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1097 must be defined and you must still, unless you define DISABLE_TLS, manage
1098 the the include-dir and library-file requirements that go with that
1099 choice. Non-TLS builds are still supported.
1101 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1104 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1105 default. If the platform supports and has the facility enabled, it will
1106 be requested on all coneections.
1108 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1109 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1111 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1113 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1114 success-DSN messages. Previously the From: header was always the default
1115 one for these; the option was ignored.
1117 JH/28 Fix the timeout on smtp response to apply to the whole response.
1118 Previously it was reset for every read, so a teergrubing peer sending
1119 single bytes within the time limit could extend the connection for a
1120 long time. Credit to Qualsys Security Advisory Team for the discovery.
1122 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1123 delivery address, which leaked information of the results of local
1124 forwarding. Change to the original envelope recipient address, per
1127 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1128 requested. Previously not bounce was generated and a log entry of
1129 error ignored was made.
1131 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1133 JH/32 Introduce a general tainting mechanism for values read from the input
1134 channel, and values derived from them. Refuse to expand any tainted
1135 values, to catch one form of exploit.
1137 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1138 was unused and the unexpanded text used for the test. Found and
1139 fixed by Ruben Jenster.
1141 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1142 an attempt to use a TLS library read routine dereffed a nul pointer,
1145 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1146 them in our smtp response.
1148 JH/36 Have the general router option retry_use_local_part default to true when
1149 any of the restrictive preconditions are set (to anything). Previously it
1150 was only for check_local user. The change removes one item of manual
1151 configuration which is required for proper retries when a remote router
1152 handles a subset of addresses for a domain.
1154 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1155 link count into consideration.
1157 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1158 caused the extension of big_buffer, the following lines were ignored.
1160 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1161 accordance with RFC 2308. Previously there was no expiry, so a longlived
1162 receive process (eg. due to ACL delays) versus a short SOA value could
1165 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1167 JH/39 Promote DMARC support to mainline.
1169 JH/40 Bug 2452: Add a References: header to DSNs.
1171 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1172 parameters. The relevant library call is documented as "Deprecated: This
1173 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1174 3.6.0, DH parameters are negotiated following RFC7919."
1176 HS/06 Change the default of dnssec_request_domains to "*"
1178 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1179 carried on and emitted a BDAT command, even when PIPELINING was not
1182 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1183 buffer was used for the filename, resulting in a trap when tainted
1184 arguments (eg. $domain) were used.
1186 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1187 recommended to avoid a possible server-load attack. The feature can be
1188 re-enabled via the openssl_options main cofiguration option.
1190 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1191 for version 4.90 - adding a "more data" boolean to the arguments.
1192 Bumped the ABI version number also, this having been missed previously;
1193 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1194 respect of usage of smtp_printf() by either local_scan code or libraries
1195 accessed via the ${dlfunc } expansion item. Both will need coding
1196 adjustment for any calls to smtp_printf() to match the new function
1197 signature; a FALSE value for the new argument is always safe.
1199 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1200 the file-offset (which the Linux syscall does, and exim expects); this
1201 resulted in an indefinite loop.
1203 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1204 to do ARC verification. The Authentication-Results: header line added
1205 by the configuration then had no ARC item.
1207 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1208 an incorrect mode was used for reading the result, resulting in it being
1215 JH/01 Remove code calling the customisable local_scan function, unless a new
1216 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1218 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1219 non-signal-safe functions being used.
1221 JH/03 Bug 2269: When presented with a received message having a stupidly large
1222 number of DKIM-Signature headers, disable DKIM verification to avoid
1223 a resource-consumption attack. The limit is set at twenty.
1225 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1226 report of oldest_pass in ${authres } in consequence, and separate out
1227 some descriptions of reasons for verification fail.
1229 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1230 files in the spool were present and unlocked. A queue-runner could spot
1231 them, resulting in a duplicate delivery. Fix that by doing the unlock
1232 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1233 add more error-checking on spoolfile handling while that code is being
1236 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1237 No known attacks, no CVE, this is defensive hardening.
1239 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1240 a queue-runner could start a delivery while other operations were ongoing.
1241 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1242 Found and investigated by Tim Stewart. Fix by using the open message data
1243 file handle rather than opening another, and not locally closing it (which
1244 releases a lock) for that case, while creating the temporary .eml format
1245 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1247 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1248 $sender_verify_failure/$recipient_verify_failure to "random".
1250 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1253 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1254 Previously this would segfault.
1256 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1259 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1260 like zero, since the resolver should be doing this for us, But we need one
1261 as a CNAME but no MX presence gets the CNAME returned; we need to check
1262 that doesn't point to an MX to declare it "no MX returned" rather than
1263 "error, loop". A new main option is added so the older capability of
1264 following some limited number of chain links is maintained.
1266 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1268 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1269 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1270 now-deprecated earlier definitions used only specified the range up to TLS
1271 1.2 (in the older-version library docs).
1273 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1275 JH/15 Rework TLS client-side context management. Stop using a global, and
1276 explicitly pass a context around. This enables future use of TLS for
1277 connections to service-daemons (eg. malware scanning) while a client smtp
1278 connection is using TLS; with cutthrough connections this is quite likely.
1280 JH/16 Fix ARC verification to do AS checks in reverse order.
1282 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1284 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1285 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1286 Previously the "utf8" would be re-prepended for every additional message.
1288 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1289 Previously thery were accepted, resulting in issues when attempting to
1290 forward messages to a non-supporting MTA.
1292 PP/02 Let -n work with printing macros too, not just options.
1294 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1295 one parent address was copied, and bogus data was used at delivery-logging
1296 time. Either a crash (after delivery) or bogus log data could result.
1297 Discovery and analysis by Tim Stewart.
1299 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1300 Previously if the string ended mid-character, we did not insert the
1301 promised '?' replacement.
1303 PP/04 Documentation: current string operators work on bytes, not codepoints.
1305 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1306 should pack well giving a smaller memory footprint so better caching and
1307 therefore performance. Group the declarations where this can't be done so
1308 that the byte-sized flag variables are not interspersed among pointer
1309 variables, giving a better chance of good packing by the compiler.
1311 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1312 non-null, to avoid issues with sites running BATV. Previously reports were
1313 sent with an empty envelope sender so looked like bounces.
1315 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1316 The ignore_error flag wasn't being returned from the filter subprocess so
1317 was not set for later routers. Investigation and fix by Matthias Kurz.
1319 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1320 and a msg:complete for the whole, when a message is manually removed using
1321 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1323 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1324 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1325 hope that is portable enough.
1327 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1328 requiring a known-CA anchor certificate; make it now rely entirely on the
1329 TLSA as an anchor. Checking the name on the leaf cert against the name
1330 on the A-record for the host is still done for TA (but not for EE mode).
1332 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1333 included in delivery lines for non-proxied connections, when compiled with
1334 SUPPORT_SOCKS and running with proxy logging enabled.
1336 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1337 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1338 move the existing event to fire before the normal logging of message
1339 failure so that custom logging is bracketed by normal logging.
1341 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1342 msg:fail:internal event. Developement by Matthias Kurz.
1344 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1345 far too small for todays use of crypto signatures stored there. Go all
1346 the way to the max DNS message size of 64kB, even though this might be
1347 overmuch for IOT constrained device use.
1349 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1350 copy a string over itself. The library routine is documented as not
1351 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1353 JH/32 For main options check_spool_space and check_inode_space, where the
1354 platform supports 64b integers, support more than the previous 2^31 kB
1355 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1356 the previous G, M, k.
1358 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1359 $authenticated_fail_id variable on authentication failure. Previously
1362 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1363 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1364 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1365 GNUTLS_SEC_PARAM_MEDIUM.
1367 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1368 side. Previously we would continue as if no SNI had been received.
1370 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1371 "<" character, which should be a list-separator specification, we walked
1372 off past the nul-terimation.
1374 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1375 causes) even when the retry time is not yet met. Previously they were
1376 not, meaning that when (say) an account was over-quota and temp-rejecting,
1377 and multiple senders' messages were queued, only one sender would get
1378 notified on each configured delay_warning cycle.
1380 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1382 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1383 cipher-suites, an error can be left on the stack even for a succeeding
1384 accept; this results in impossible error messages when a later operation
1387 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1388 return error codes indicating retry. Under TLS1.3 this becomes required.
1390 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1391 it only wrote the new authenticators, resulting in a lack of tracking of
1392 peer changes of ESMTP extensions until the next cache flush.
1394 JH/41 Fix the loop reading a message header line to check for integer overflow,
1395 and more-often against header_maxsize. Previously a crafted message could
1396 induce a crash of the recive process; now the message is cleanly rejected.
1398 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1399 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1405 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1406 When redis_servers is set to a list of > 1 element, and the Redis servers
1407 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1408 case of MOVED into a DEFER case instead, thus moving the query onto the
1409 next server in the list. For a cluster of N elements, all N servers must
1410 be defined in redis_servers.
1412 GF/02 Catch and remove uninitialized value warning in exiqsumm
1413 Check for existence of @ARGV before looking at $ARGV[0]
1415 JH/01 Replace the store_release() internal interface with store_newblock(),
1416 which internalises the check required to safely use the old one, plus
1417 the allocate and data copy operations duplicated in both (!) of the
1418 extant use locations.
1420 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1421 modifier. This matches the restriction on the commandline.
1423 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1424 Previously only the last row was returned.
1426 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1427 we assumed that tags in the header were well-formed, and parsed the
1428 element content after inspecting only the first char of the tag.
1429 Assumptions at that stage could crash the receive process on malformed
1432 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1433 While running the DKIM ACL we operate on the Permanent memory pool so that
1434 variables created with "set" persist to the DATA ACL. Also (at any time)
1435 DNS lookups that fail create cache records using the Permanent pool. But
1436 expansions release any allocations made on the current pool - so a dnsdb
1437 lookup expansion done in the DKIM ACL releases the memory used for the
1438 DNS negative-cache, and bad things result. Solution is to switch to the
1439 Main pool for expansions.
1440 While we're in that code, add checks on the DNS cache during store_reset,
1441 active in the testsuite.
1442 Problem spotted, and debugging aided, by Wolfgang Breyha.
1444 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1445 When none of the hosts presented to a transport match an already-open
1446 connection, close it and proceed with the list. Previously we would
1447 queue the message. Spotted by Lena with Yahoo, probably involving
1450 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1451 Previously a spurious "250 OK id=" response was appended to the proper
1454 JH/08 The "support for" informational output now, which built with Content
1455 Scanning support, has a line for the malware scanner interfaces compiled
1456 in. Interface can be individually included or not at build time.
1458 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1459 by the template makefile "src/EDITME". The "STREAM" support for an older
1460 ClamAV interface method is removed.
1462 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1463 rows affected is given instead).
1465 JH/11 The runtime Berkeley DB library version is now additionally output by
1466 "exim -d -bV". Previously only the compile-time version was shown.
1468 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1469 SMTP connection. Previously, when one had more recipients than the
1470 first, an abortive onward connection was made. Move to full support for
1471 multiple onward connections in sequence, handling cutthrough connection
1472 for all multi-message initiating connections.
1474 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1475 routers. Previously, a multi-recipient message would fail to match the
1476 onward-connection opened for the first recipient, and cause its closure.
1478 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1479 a timeout on read on a GnuTLS initiating connection, resulting in the
1480 initiating connection being dropped. This mattered most when the callout
1481 was marked defer_ok. Fix to keep the two timeout-detection methods
1484 JH/15 Relax results from ACL control request to enable cutthrough, in
1485 unsupported situations, from error to silently (except under debug)
1486 ignoring. This covers use with PRDR, frozen messages, queue-only and
1489 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1491 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1492 metadata, resulting in a crash in free().
1494 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1495 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1496 Broken also in d185889f4, with init system revamp.
1498 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1499 Previously we abruptly closed the connection after reading a malware-
1500 found indication; now we go on to read the "scan ok" response line,
1503 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1504 ACL. Previously, a crash would result.
1506 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1507 macro text after a replacement (previously it was only once per line) and
1508 by skipping builtin macros when searching for an uppercase lead character.
1510 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1511 for the build is renamed.
1513 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1514 was allocated for every new TLS startup, meaning one per message. Fix
1515 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1517 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1518 reported the original. Fix to report (as far as possible) the ACL
1519 result replacing the original.
1521 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1522 OpenSSL. Certificate information is loaded for every new TLS startup,
1523 and the resources needed to be freed.
1525 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1527 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1530 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1531 DATA response info to the (existing) per-recipient response info for
1532 the "C=" log element. It can have useful tracking info from the
1533 destination system. Patch from Simon Arlott.
1535 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1536 length value. Previously this would segfault.
1538 HS/02 Support Avast multiline protoocol, this allows passing flags to
1539 newer versions of the scanner.
1541 JH/28 Ensure that variables possibly set during message acceptance are marked
1542 dead before release of memory in the daemon loop. This stops complaints
1543 about them when the debug_store option is enabled. Discovered specifically
1544 for sender_rate_period, but applies to a whole set of variables.
1545 Do the same for the queue-runner and queue-list loops, for variables set
1546 from spool message files. Do the same for the SMTP per-message loop, for
1547 certain variables indirectly set in ACL operations.
1549 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1550 as a multi-recipient message from a mailinglist manager). The coding had
1551 an arbitrary cutoff number of characters while checking for more input;
1552 enforced by writing a NUL into the buffer. This corrupted long / fast
1553 input. The problem was exposed more widely when more pipelineing of SMTP
1554 responses was introduced, and one Exim system was feeding another.
1555 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1556 receiving system, and refused recipients seen by the sending system
1557 (propating to people being dropped from mailing lists).
1558 Discovered and pinpointed by David Carter.
1560 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1561 replaced by the ${authresults } expansion.
1563 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1565 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1566 allows proper process termination in container environments.
1568 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1569 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1571 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1572 and "err_perm", deprecated since 4.83 when the RFC-defined words
1573 "temperror" and "permerror" were introduced.
1575 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1576 transport-filters or DKIM-signing. The restriction was lost in the
1577 consolidation of verify-callout and delivery SMTP handling.
1578 Extend the restriction to also cover ARC-signing.
1580 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1581 in defer=pass mode supply a 450 to the initiator. Previously the message
1584 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1585 tls_require_ciphers is used as before.
1587 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1588 "pass_unscanned". Only tmpfails from the scanner are written to
1589 the paniclog, as they may require admin intervention (permission
1590 denied, license issues). Other scanner errors (like decompression
1591 bombs) do not cause a paniclog entry.
1593 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1594 Previously it was possible to log spurious information in receive log
1597 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1598 triggered odd behaviour from Outlook Express clients.
1600 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1603 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1604 since the IETF WG has not yet settled on that versus the original
1605 "bare" representation.
1607 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1608 Previously the millisecond value corrupted the output.
1609 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1610 corrupted the output.
1616 JH/01 Rework error string handling in TLS interface so that the caller in
1617 more cases is responsible for logging. This permits library-sourced
1618 string to be attached to addresses during delivery, and collapses
1619 pairs of long lines into single ones.
1621 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1622 during configuration. Wildcards are allowed and expanded.
1624 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1625 This permits better logging.
1627 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1628 do not close it down and have the child transport start it up again on
1629 the passed-on TCP connection. Instead, proxy the child (and any
1630 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1631 affected: the continued delivery log lines do not have any DNSSEC, TLS
1632 Certificate or OCSP information. TLS cipher information is still logged.
1634 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1635 identical IP addresses on different listening ports. Will also affect
1638 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1639 add noisy ifdef guards to special-case this sillyness.
1640 Patch from Bernd Kuhls.
1642 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1643 than 255 are no longer allowed.
1645 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1646 Disable the session-cache too, which might reduce our load. Since we
1647 currrectly use a new context for every connection, both as server and
1648 client, there is no benefit for these.
1649 GnuTLS appears to not support tickets server-side by default (we don't
1650 call gnutls_session_ticket_enable_server()) but client side is enabled
1651 by default on recent versions (3.1.3 +) unless the PFS priority string
1654 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1655 <https://reproducible-builds.org/specs/source-date-epoch/>.
1657 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1658 the check for any unsuccessful recipients did not notice the limit, and
1659 erroneously found still-pending ones.
1661 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1662 MSG_MORE. Only in-clear (not on TLS connections).
1664 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1665 transport-filter is involved we can buffer the headers in memory for
1666 creating the signature, and read the spool data file once for the
1667 signature and again for transmission.
1669 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1670 4.77 as the kernel support then wasn't solid, having issues in 64bit
1671 mode. Now, it's been long enough. Add support for FreeBSD also.
1673 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1674 case where the routing stage had gathered several addresses to send to
1675 a host before calling the transport for the first, we previously failed
1676 to close down TLS in the old transport process before passing the TCP
1677 connection to the new process. The new one sent a STARTTLS command
1678 which naturally failed, giving a failed delivery and bloating the retry
1679 database. Investigation and fix prototype from Wolfgang Breyha.
1681 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1682 false-negatives in the check that the sender had not preempted a response
1683 or prompt from Exim (running as a server), due to that code's lack of
1684 awareness of the SMTP input buffering.
1686 PP/04 Add commandline_checks_require_admin option.
1687 Exim drops privileges sanely, various checks such as -be aren't a
1688 security problem, as long as you trust local users with access to their
1689 own account. When invoked by services which pass untrusted data to
1690 Exim, this might be an issue. Set this option in main configuration
1691 AND make fixes to the calling application, such as using `--` to stop
1694 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1695 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1696 responses to those, into a single TLS record each way (this usually means
1697 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1700 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1701 affects you only if you're dancing at the edge of the param size limits.
1702 If you are, and this message makes sense to you, then: raise the
1703 configured limit or use OpenSSL 1.1. Nothing we can do for older
1706 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1707 cmdline element to get the documented default one. Previously it was
1710 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1711 are unsuable for non-message-specific reasons - eg. connection timeout,
1712 banner-time rejection.
1714 JH/16 Fix logging of delivery remote port, when specified by router, under
1717 PP/06 Repair manualroute's ability to take options in any order, even if one
1718 is the name of a transport.
1721 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1723 JH/17 Change the list-building routines interface to use the expanding-string
1724 triplet model, for better allocation and copying behaviour.
1726 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1727 Previously it was constructed the first time a possibly-matching string
1728 was met in the configuration file input during startup; now it is done
1731 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1732 compatible one, to avoid the (poorly documented) possibility of a config
1733 file in the working directory redirecting the DB files, possibly correpting
1734 some existing file. CVE-2017-10140 assigned for BDB.
1736 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1737 cache-hot. Previously, although the result was properly cached, the
1738 initial verify call returned a defer.
1740 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1741 the main verify for receipient in uncached-mode.
1743 JH/22 Retire historical build files to an "unsupported" subdir. These are
1744 defined as "ones for which we have no current evidence of testing".
1746 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1747 if present. Previously it was ignored.
1749 JH/24 Start using specified-initialisers in C structure init coding. This is
1750 a C99 feature (it's 2017, so now considered safe).
1752 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1753 if was a fixed-sized field and bitmask ops via macros; it is now more
1756 PP/07 GitHub PR 56: Apply MariaDB build fix.
1757 Patch provided by Jaroslav Škarvada.
1759 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1760 during Coverity cleanups [4.87 JH/47]
1761 Diagnosis and fix provided by Michael Fischer v. Mollard.
1763 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1764 the right size to place the terminating semicolon on its own folded
1765 line, the header hash was calculated to an incorrect value thanks to
1766 the (relaxed) space the fold became.
1768 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1769 and confused the parent.
1771 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1772 which could crash as a result. This could lead to undeliverable messages.
1774 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1777 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1778 matters on fast-turnover and PID-randomising systems, which were getting
1779 out-of-order delivery.
1781 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1782 a possibly-overlapping copy. The symptom was that "Remote host closed
1783 connection in response to HELO" was logged instead of the actual 4xx
1786 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1787 Previously only that bufferd was discarded, resulting in SYMTP command
1790 JH/32 DKIM: when a message has multiple signatures matching an identity given
1791 in dkim_verify_signers, run the dkim acl once for each. Previously only
1792 one run was done. Bug 2189.
1794 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1795 "panic the current process" to "deliberately defer". The panic log is
1796 still written with the problem list name; the mail and reject logs now
1797 get a temp-reject line for the message that was being handled, saying
1798 something like "domains check lookup or other defer". The SMTP 451
1799 message is still "Temporary local problem".
1801 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1802 A crafted sequence of BDAT commands could result in in-use memory beeing
1803 freed. CVE-2017-16943.
1805 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1806 from SMTP input. Previously it was always done; now only done for DATA
1807 and not BDAT commands. CVE-2017-16944.
1809 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1810 to the message (such as an overlong header line). Previously this was
1811 not done and we did not exit BDAT mode. Followon from the previous item
1812 though a different problem.
1818 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1819 than -2003 did; needs libidn2 in addition to libidn.
1821 JH/02 The path option on a pipe transport is now expanded before use.
1823 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1824 Patch provided by "Björn", documentation fix added too.
1826 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1827 missing a wire-to-host endian conversion.
1829 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1830 close after a BDAT command line could be taken as a following command,
1831 giving a synch failure. Fix by only checking for synch immediately
1832 before acknowledging the chunk.
1834 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1835 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1836 macro. Patches provided by Josh Soref.
1838 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1839 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1840 by IANA as a service extension. However, John Klensin suggests that we
1843 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1844 the dkim code may be unix-mode line endings rather than smtp wire-format
1845 CRLF, so prepend a CR to any bare LF.
1847 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1848 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1850 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1851 the first were themselves being wrongly included in the feed into dkim
1852 processing; with most chunk sizes in use this resulted in an incorrect
1853 body hash calculated value.
1855 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1856 DKIM signature block, for verification. Although advised against by
1857 standards it is specifically not ruled illegal.
1859 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1861 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1862 missing a body hash (the bh= tag).
1864 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1865 It seems that HAProxy sends the Proxy Protocol information in clear and
1866 only then does a TLS startup, so do the same.
1868 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1869 TCP connections (such as for Spamd) unless the daemon successfully set
1870 Fast Open mode on its listening sockets. This fixes breakage seen on
1871 too-old kernels or those not configured for Fast Open, at the cost of
1872 requiring both directions being enabled for TFO, and TFO never being used
1873 by non-daemon-related Exim processes.
1875 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1876 endings, at least on the first header line. Try to canonify any that get
1877 past that check, despite the cost.
1879 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1880 now limited to an arbitrary five deep, while parsing addresses with the
1881 strip_excess_angle_brackets option enabled.
1883 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1884 instead leave the unprompted TLS handshake in socket buffer for the
1885 TLS library to consume.
1887 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1889 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1891 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1892 region in one operation, for speed, and this leaves assigned pointers
1893 dangling. Add checks run only under the testsuite which checks all
1894 variables at a store-reset and panics on a dangling pointer; add code
1895 explicitly nulling out all the variables discovered. Fixes one known
1896 bug: a transport crash, where a dangling pointer for $sending_ip_address
1897 originally assigned in a verify callout, is re-used.
1899 PP/06 Drop '.' from @INC in various Perl scripts.
1901 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1903 PP/08 Reduce a number of compilation warnings under clang; building with
1904 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1905 should be warning-free.
1907 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1909 HS/01 Fix portability problems introduced by PP/08 for platforms where
1910 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1912 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1913 chunk. This allows us to accept broken chunked messages. We need a more
1914 general solution here.
1916 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1917 already-broken messages in the queue.
1919 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1921 JH/19 Fix reference counting bug in routing-generated-address tracking.
1927 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1928 supports it and a size is available (ie. the sending peer gave us one).
1930 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1931 years of being deprecated). The replacements are the ACLs
1932 acl_smtp_mime and acl_not_smtp_mime.
1934 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1935 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1936 or even an in-clear connection were permitted. Now, if the host lookup
1937 was dnssec and dane was requested then the host is only used if the
1938 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1939 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1940 if one fails this test.
1941 This means that a poorly-configured remote DNS will make it incommunicado;
1942 but it protects against a DNS-interception attack on it.
1944 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1945 non-noisy when a race steals the message being considered.
1947 JH/05 If main configuration option tls_certificate is unset, generate a
1948 self-signed certificate for inbound TLS connections.
1950 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1951 in rewrites and routers.
1953 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1954 and logged a warning sing 4.83; now they are a configuration file error.
1956 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1957 (lacking @domain). Apply the same qualification processing as RCPT.
1959 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1961 JH/10 Support ${sha256:} applied to a string (as well as the previous
1964 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1965 a cutthrough deliver is pending, as we always want to make a connection.
1966 This also avoids re-routing the message when later placing the cutthrough
1967 connection after a verify cache hit.
1968 Do not update it with the verify result either.
1970 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1971 when routing results in more than one destination address.
1973 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1974 signing (which inhibits the cutthrough capability). Previously only
1975 the presence of an option was tested; now an expansion evaluating as
1976 empty is permissible (obviously it should depend only on data available
1977 when the cutthrough connection is made).
1979 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1980 the relevant preceding SMTP command did not note the pipelining mode.
1982 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1983 Previously they were not counted.
1985 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1986 as one having no matching records. Previously we deferred the message
1987 that needed the lookup.
1989 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1990 distinguished as "(=".
1992 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1993 for missing MX records. Previously it only worked for missing A records.
1995 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1997 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1998 after the data-go-ahead and data-ack. Patch from Jason Betts.
2000 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2001 even for a "none" policy. Patch from Tony Meyer.
2003 JH/22 Fix continued use of a connection for further deliveries. If a port was
2004 specified by a router, it must also match for the delivery to be
2007 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2008 When one of the recipients of a message was unsuitable for the connection
2009 (has no matching addresses), we lost track of needing to mark it
2010 deferred. As a result mail would be lost.
2012 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2014 JH/25 Decoding ACL controls is now done using a binary search; the source code
2015 takes up less space and should be simpler to maintain. Merge the ACL
2016 condition decode tables also, with similar effect.
2018 JH/26 Fix problem with one_time used on a redirect router which returned the
2019 parent address unchanged. A retry would see the parent address marked as
2020 delivered, so not attempt the (identical) child. As a result mail would
2023 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2024 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2025 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2028 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2029 Main config options check_{log,spool}_{inodes,space} are now
2030 100 inodes, 10MB unless set otherwise in the configuration.
2032 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2033 Previously it only applied to the main-section connection policy
2036 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2038 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2039 by me. Added RFC7919 DH primes as an alternative.
2041 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2042 are not in the system include path.
2044 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2045 GnuTLS, when a session startup failed (eg because the client disconnected)
2046 Exim did stdio operations after fclose. This was exposed by a recent
2047 change which nulled out the file handle after the fclose.
2049 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2050 signed directly by the cert-signing cert, rather than an intermediate
2051 OCSP-signing cert. This is the model used by LetsEncrypt.
2053 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2055 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2056 an incoming connection.
2058 HS/02 Bug 1802: Do not half-close the connection after sending a request
2061 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2062 fallback to "prime256v1".
2064 JH/34 SECURITY: Use proper copy of DATA command in error message.
2065 Could leak key material. Remotely exploitable. CVE-2016-9963.
2071 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2072 and 3.4.4 - once the server is enabled to respond to an OCSP request
2073 it does even when not requested, resulting in a stapling non-aware
2074 client dropping the TLS connection.
2076 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2077 support variable-length bit vectors. No functional change.
2079 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2080 The I= interface field on outgoing lines is now after the H= remote
2081 host field, same as incoming lines. There is a separate
2082 outgoing_interface log selector which allows you to disable the
2085 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2086 If not running log_selector +smtp_connection the mainlog would be held
2087 open indefinitely after a "too many connections" event, including to a
2088 deleted file after a log rotate. Leave the per net connection logging
2089 leaving it open for efficiency as that will be quickly detected by the
2090 check on the next write.
2092 HS/01 Bug 1671: Fix post transport crash.
2093 Processing the wait-<transport> messages could crash the delivery
2094 process if the message IDs didn't exist for some reason. When
2095 using 'split_spool_directory=yes' the construction of the spool
2096 file name failed already, exposing the same netto behaviour.
2098 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2099 mime_regex ACL conditions.
2101 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2102 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2103 to HELO, local diagnostic string.
2105 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2106 log line to debug. Even when configured with a tls authenticator many
2107 client connections are expected to not authenticate in this way, so
2108 an authenticate fail is not an error.
2110 HS/02 Add the Exim version string to the process info. This way exiwhat
2111 gives some more detail about the running daemon.
2113 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2114 matter for fast-change records such as DNSBLs.
2116 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2117 retry record, even if constant. There may be multiple transports with
2118 different interface settings and the retry behaviour needs to be kept
2121 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2123 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2125 JH/10 Bug 840: fix log_defer_output option of pipe transport
2127 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2128 hosts_randomize. This matters a lot when combined with mua_wrapper.
2130 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2131 ${quote_pgsql:<string>} operator.
2133 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2135 JH/14 Change header file name for freeradius-client. Relevant if compiling
2136 with Radius support; from the Gentoo tree and checked under Fedora.
2138 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2140 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2141 option transport_filter, meaning no filtering.
2143 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2145 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2146 defaults to "*" (all hosts). The variable is now available when not built
2147 with TLS, default unset, mainly to enable keeping the testsuite sane.
2148 If a server certificate is not supplied (via tls_certificate) an error is
2149 logged, and clients will find TLS connections fail on startup. Presumably
2150 they will retry in-clear.
2151 Packagers of Exim are strongly encouraged to create a server certificate
2152 at installation time.
2154 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2155 with the $config_file variable.
2157 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2158 in transport context, after the attempt, and per-recipient. The latter type
2159 is per host attempted. The event data is the error message, and the errno
2160 information encodes the lookup type (A vs. MX) used for the (first) host,
2161 and the trailing two digits of the smtp 4xx response.
2163 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2164 to write to mainlog (or rejectlog, paniclog) in the window between file
2165 creation and permissions/ownership being changed. Particularly affects
2166 installations where exicyclog is run as root, rather than exim user;
2167 result is that the running daemon panics and dies.
2169 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2171 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2172 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2173 "pri" and "weight". Note that the previous implicit priority given by the
2174 list order is no longer honoured.
2176 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2177 for DKIM processing.
2179 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2180 by defining SUPPORT_SOCKS.
2182 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2183 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2184 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2185 variables are renamed to proxy_{local,external}_{address,port}.
2187 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2188 for a build by defining SUPPORT_I18N
2190 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2191 of the query string, and make ${quote_redis:} do that quoting.
2193 JH/29 Move Events support from Experimental to mainline, enabled by default
2194 and removable for a build by defining DISABLE_EVENT.
2196 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2198 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2199 cached by the daemon.
2201 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2202 by defining LOOKUP_REDIS. The libhiredis library is required.
2204 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2205 keys are given for lookup.
2207 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2208 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2209 only supported when built with TLS support. The PolarSSL SHA routines
2210 are still used when the TLS library is too old for convenient support.
2212 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2213 openssl_options), for security. OpenSSL forces this from version 1.1.0
2214 server-side so match that on older versions.
2216 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2217 allocation for $value could be released as the expansion processing
2218 concluded, but leaving the global pointer active for it.
2220 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2221 and to use the domains and local_parts ACL conditions.
2223 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2224 incorrectly not doubled on cutthrough transmission, hence seen as a
2225 body-termination at the receiving system - resulting in truncated mails.
2226 Commonly the sender saw a TCP-level error, and retransmitted the message
2227 via the normal store-and-forward channel. This could result in duplicates
2228 received - but deduplicating mailstores were liable to retain only the
2229 initial truncated version.
2231 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2233 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2235 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2236 we're in there, support oversigning also; bug 1309.
2238 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2240 HS/04 Add support for keep_environment and add_environment options.
2242 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2243 either intentional arithmetic overflow during PRNG, or testing config-
2246 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2247 delivery resulted in actual delivery. Cancel cutthrough before DATA
2250 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2251 rejects a recipient: pass the reject to the originator.
2253 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2254 Many were false-positives and ignorable, but it's worth fixing the
2257 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2258 for the new environment-manipulation done at startup. Move the routines
2259 from being local to tls.c to being global via the os.c file.
2261 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2262 an extract embedded as result-arg for a map, the first arg for extract
2263 is unavailable so we cannot tell if this is a numbered or keyed
2264 extraction. Accept either.
2270 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2273 JH/02 The smtp transport option "multi_domain" is now expanded.
2275 JH/03 The smtp transport now requests PRDR by default, if the server offers
2278 JH/04 Certificate name checking on server certificates, when exim is a client,
2279 is now done by default. The transport option tls_verify_cert_hostnames
2280 can be used to disable this per-host. The build option
2281 EXPERIMENTAL_CERTNAMES is withdrawn.
2283 JH/05 The value of the tls_verify_certificates smtp transport and main options
2284 default to the word "system" to access the system default CA bundle.
2285 For GnuTLS, only version 3.0.20 or later.
2287 JH/06 Verification of the server certificate for a TLS connection is now tried
2288 (but not required) by default. The verification status is now logged by
2289 default, for both outbound TLS and client-certificate supplying inbound
2292 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2295 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2296 Status Notification (bounce) messages are now MIME format per RFC 3464.
2297 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2298 under the control of the dsn_advertise_hosts option, and routers may
2299 have a dsn_lasthop option.
2301 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2302 default, modifiable by a malware= option. The list separator for
2303 the options can now be changed in the usual way. Bug 68.
2305 JH/10 The smtp_receive_timeout main option is now expanded before use.
2307 JH/11 The incoming_interface log option now also enables logging of the
2308 local interface on delivery outgoing connections.
2310 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2311 if the interface and destination host and port all match.
2313 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2316 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2317 Patch from Andrew Lewis.
2319 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2320 now supports optional time-restrictions, weighting, and priority
2321 modifiers per server. Patch originally by <rommer@active.by>.
2323 JH/16 The spamd_address main option now supports a mixed list of local
2324 and remote servers. Remote servers can be IPv6 addresses, and
2325 specify a port-range.
2327 JH/17 Bug 68: The spamd_address main option now supports an optional
2328 timeout value per server.
2330 JH/18 Bug 1581: Router and transport options headers_add/remove can
2331 now have the list separator specified.
2333 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2336 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2339 JH/21 Support for the A6 type of dns record is withdrawn.
2341 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2342 rather than the verbs used.
2344 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2345 from 255 to 1024 chars.
2347 JH/24 Verification callouts now attempt to use TLS by default.
2349 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2350 are generic router options now. The defaults didn't change.
2352 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2353 Original patch from Alexander Shikoff, worked over by JH.
2355 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2356 files if ZCAT_COMMAND is not executable.
2358 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2360 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2362 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2363 Normally benign, it bites when the pair was led to by a CNAME;
2364 modern usage is to not canonicalize the domain to a CNAME target
2365 (and we were inconsistent anyway for A-only vs AAAA+A).
2367 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2369 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2370 when evaluating $sender_host_dnssec.
2372 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2373 $sender_helo_dnssec variable.
2375 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2377 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2379 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2381 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2382 documented as working, but never had. Support all but $spam_report.
2384 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2385 added for tls authenticator.
2387 HS/03 Add perl_taintmode main config option
2393 TL/01 When running the test suite, the README says that variables such as
2394 no_msglog_check are global and can be placed anywhere in a specific
2395 test's script, however it was observed that placement needed to be near
2396 the beginning for it to behave that way. Changed the runtest perl
2397 script to read through the entire script once to detect and set these
2398 variables, reset to the beginning of the script, and then run through
2399 the script parsing/test process like normal.
2401 TL/02 The BSD's have an arc4random API. One of the functions to induce
2402 adding randomness was arc4random_stir(), but it has been removed in
2403 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2404 function when detected.
2406 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2407 cause callback expansion.
2409 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2410 syntax errors in an expansion can be treated as a string instead of
2411 logging or causing an error, due to the internal use of bool_lax
2412 instead of bool when processing it.
2414 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2415 server certificates when making smtp deliveries.
2417 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2419 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2421 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2423 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2424 Merged patch from Sebastian Wiedenroth.
2426 JH/05 Fix results-pipe from transport process. Several recipients, combined
2427 with certificate use, exposed issues where response data items split
2428 over buffer boundaries were not parsed properly. This eventually
2429 resulted in duplicates being sent. This issue only became common enough
2430 to notice due to the introduction of connection certificate information,
2431 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2433 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2434 size buffer was used, resulting in syntax errors when an expansion
2437 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2438 version 3.3.6 or later.
2440 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2441 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2442 both become "event_action", the variables become $event_name, $event_data
2443 and $event_defer_errno. There is a new variable $verify_mode, usable in
2444 routers, transports and related events. The tls:cert event is now also
2445 raised for inbound connections, if the main configuration event_action
2448 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2449 early OCSP support, but no stapling (appears to be less than 1.0.0).
2451 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2452 server certificate names available under the smtp transport option
2453 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2456 JH/10 Time-related extraction expansions from certificates now use the main
2457 option "timezone" setting for output formatting, and are consistent
2458 between OpenSSL and GnuTLS compilations. Bug 1541.
2460 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2461 encoded parameter in the incoming message. Bug 1558.
2463 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2464 include certificate info, eximon was claiming there were spoolfile
2467 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2469 JH/14 Log delivery-related information more consistently, using the sequence
2470 "H=<name> [<ip>]" wherever possible.
2472 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2473 are problematic for Debian distribution, omit them from the release
2476 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2478 JH/16 Fix string representation of time values on 64bit time_t architectures.
2481 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2482 output list separator was used.
2487 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2488 checkers that were complaining about end of non-void function with no
2491 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2492 This was a regression introduced in 4.83 by another bugfix.
2494 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2496 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2497 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2503 TF/01 Correctly close the server side of TLS when forking for delivery.
2505 When a message was received over SMTP with TLS, Exim failed to clear up
2506 the incoming connection properly after forking off the child process to
2507 deliver the message. In some situations the subsequent outgoing
2508 delivery connection happened to have the same fd number as the incoming
2509 connection previously had. Exim would try to use TLS and fail, logging
2510 a "Bad file descriptor" error.
2512 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2513 utilities have not been installed.
2515 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2516 temporary space as the ACL may create new global variables.
2518 TL/01 LDAP support uses per connection or global context settings, depending
2519 upon the detected version of the libraries at build time.
2521 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2522 to extract and use the src ip:port in logging and expansions as if it
2523 were a direct connection from the outside internet. PPv2 support was
2524 updated based on HAProxy spec change in May 2014.
2526 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2528 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2529 Properly escape header and check for NULL return.
2531 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2534 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2536 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2537 characters in header names, implemented as a verify condition.
2538 Contributed by Michael Fischer v. Mollard.
2540 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2541 results permerror and temperror. Previous values are deprecated but
2542 still accepted. In a future release, err_perm and err_temp will be
2543 completely removed, which will be a backward incompatibility if the
2544 ACL tests for either of these two old results. Patch contributed by
2545 user bes-internal on the mailing list.
2547 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2549 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2550 selectors, in both main and reject logs.
2552 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2555 JH/07 Add malware type "sock" for talking to simple daemon.
2557 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2559 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2560 routers/transports under cutthrough routing.
2562 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2563 numbers. Touch up "bool" conditional to keep the same definition.
2565 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2567 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2569 JH/12 Expand items in router/transport headers_add or headers_remove lists
2570 individually rather than the list as a whole. Bug 1452.
2572 Required for reasonable handling of multiple headers_ options when
2573 they may be empty; requires that headers_remove items with embedded
2574 colons must have them doubled (or the list-separator changed).
2576 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2577 view the policy declared in the DMARC record. Currently, $dmarc_status
2578 is a combined value of both the record presence and the result of the
2581 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2583 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2584 dnslookup router and the smtp transport (applying to the forward
2587 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2588 of ldap servers used for a specific lookup. Patch provided by Heiko
2591 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2592 New variable $lookup_dnssec_authenticated for observability.
2594 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2595 Patch submitted by Lars Timman.
2597 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2599 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2600 Requires trusted mode and valid format message id, aborts otherwise.
2601 Patch contributed by Heiko Schlichting.
2603 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2604 certextract with support for various fields. Bug 1358.
2606 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2607 is requested by default, modifiable by smtp transport option
2610 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2611 operate on certificate variables to give certificate fingerprints
2612 Also new ${sha256:cert_variable}.
2614 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2616 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2617 Christian Aistleitner.
2619 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2621 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2622 file. Patch from Wolfgang Breyha.
2624 JH/25 Expand the coverage of the delivery $host and $host_address to
2625 client authenticators run in verify callout. Bug 1476.
2627 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2628 align with daemon_smtp_ports. Bug 72.
2630 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2631 support and error reporting did not work properly.
2633 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2634 and is readable. Patch from Andrew Colin Kissa.
2636 TL/14 Enhance documentation of ${run expansion and how it parses the
2637 commandline after expansion, particularly in the case when an
2638 unquoted variable expansion results in an empty value.
2640 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2642 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2643 by renaming away from it. Addresses GH issue 15, reported by
2646 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2648 TL/15 SECURITY: prevent double expansion in math comparison functions
2649 (can expand unsanitized data). Not remotely exploitable.
2656 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2658 PP/02 Make -n do something, by making it not do something.
2659 When combined with -bP, the name of an option is not output.
2661 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2664 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2665 $sender_host_name and config options to manage this, and basic check
2668 PP/05 DSCP support for outbound connections and control modifier for inbound.
2670 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2671 (Only plugin which currently uses this is kerberos4, which nobody should
2672 be using, but we should make it available and other future plugins might
2673 conceivably use it, even though it would break NAT; stuff *should* be
2674 using channel bindings instead).
2676 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2677 name; added for Sendmail compatibility; requires admin caller.
2678 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2679 just ignore it); requires trusted caller.
2680 Also parse but ignore: -Ac -Am -X<logfile>
2683 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2685 TL/02 Add +smtp_confirmation as a default logging option.
2687 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2688 Patch by Magnus Holmgren from 2007-02-20.
2690 TL/04 Bugzilla 1281 - Spec typo.
2691 Bugzilla 1283 - Spec typo.
2692 Bugzilla 1290 - Spec grammar fixes.
2694 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2696 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2698 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2699 mailing list by by Dmitry Isaikin.
2701 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2703 JH/02 Support "G" suffix to numbers in ${if comparisons.
2705 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2707 NM/01 Bugzilla 1197 - Spec typo
2708 Bugzilla 1196 - Spec examples corrections
2710 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2712 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2713 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2716 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2717 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2719 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2720 "acl {{name}{arg}...}", and optional args on acl condition
2723 JH/05 Permit multiple router/transport headers_add/remove lines.
2725 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2727 JH/07 Avoid using a waiting database for a single-message-only transport.
2728 Performance patch from Paul Fisher. Bugzilla 1262.
2730 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2733 JH/09 Add $headers_added variable, with content from use of ACL modifier
2734 add_header (but not yet added to the message). Bugzilla 199.
2736 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2737 Pulled from Bugzilla 817 by Wolfgang Breyha.
2739 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2741 (nb: this is the same fix as in Exim 4.80.1)
2743 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2746 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2749 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2751 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2752 advertise SMTP AUTH mechanism to us, instead of a generic
2753 protocol violation error. Also, make Exim more robust to bad
2754 data from the Dovecot auth socket.
2756 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2758 When a queue runner is handling a message, Exim first routes the
2759 recipient addresses, during which it prunes them based on the retry
2760 hints database. After that it attempts to deliver the message to
2761 any remaining recipients. It then updates the hints database using
2764 So if a recipient address works intermittently, it can get repeatedly
2765 deferred at routing time. The retry hints record remains fresh so the
2766 address never reaches the final cutoff time.
2768 This is a fairly common occurrence when a user is bumping up against
2769 their storage quota. Exim had some logic in its local delivery code
2770 to deal with this. However it did not apply to per-recipient defers
2771 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2773 This change adds a proper retry rule check during routing so that the
2774 final cutoff time is checked against the message's age. We only do
2775 this check if there is an address retry record and there is not a
2776 domain retry record; this implies that previous attempts to handle
2777 the address had the retry_use_local_parts option turned on. We use
2778 this as an approximation for the destination being like a local
2779 delivery, as in LMTP.
2781 I suspect this new check makes the old local delivery cutoff check
2782 redundant, but I have not verified this so I left the code in place.
2784 TF/02 Correct gecos expansion when From: is a prefix of the username.
2786 Test 0254 submits a message to Exim with the header
2790 When I ran the test suite under the user fanf2, Exim expanded
2791 the header to contain my full name, whereas it should have added
2792 a Resent-Sender: header. It erroneously treats any prefix of the
2793 username as equal to the username.
2795 This change corrects that bug.
2797 GF/01 DCC debug and logging tidyup
2798 Error conditions log to paniclog rather than rejectlog.
2799 Debug lines prefixed by "DCC: " to remove any ambiguity.
2801 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2803 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2804 Bug spotted by Jeremy Harris; was flawed since initial commit.
2805 Would have resulted in OCSP responses post-SNI triggering an Exim
2806 NULL dereference and crash.
2808 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2810 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2811 Bug detection, analysis and fix by Samuel Thibault.
2812 Bugzilla 1331, Debian bug #698092.
2814 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2816 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2817 Server implementation by Todd Lyons, client by JH.
2818 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2819 config variable "prdr_enable" controls whether the server
2820 advertises the facility. If the client requests PRDR a new
2821 acl_data_smtp_prdr ACL is called once for each recipient, after
2822 the body content is received and before the acl_smtp_data ACL.
2823 The client is controlled by both of: a hosts_try_prdr option
2824 on the smtp transport, and the server advertisement.
2825 Default client logging of deliveries and rejections involving
2826 PRDR are flagged with the string "PRDR".
2828 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2829 fclose(). Diagnosis by Todd Lyons.
2831 PP/17 Update configure.default to handle IPv6 localhost better.
2832 Patch by Alain Williams (plus minor tweaks).
2835 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2836 This is now consistent with GnuTLS, and is now documented: the
2837 previous undocumented portable approach to treating the option as
2838 unset was to force an expansion failure. That still works, and
2839 an empty string is now equivalent.
2841 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2842 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2843 not performing validation itself.
2845 PP/20 Added force_command boolean option to pipe transport.
2846 Patch from Nick Koston, of cPanel Inc.
2848 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2851 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2853 PP/21 Fix eximon continuous updating with timestamped log-files.
2854 Broken in a format-string cleanup in 4.80, missed when I repaired the
2855 other false fix of the same issue.
2856 Report and fix from Heiko Schlichting.
2859 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2860 Report from Prashanth Katuri.
2862 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2863 It's SecureTransport, so affects any MacOS clients which use the
2864 system-integrated TLS libraries, including email clients.
2866 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2867 using a MIME ACL for non-SMTP local injection.
2868 Report and assistance in diagnosis by Warren Baker.
2870 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2872 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2874 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2875 last id that failed so it may be referenced in subsequent ACL's.
2877 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2880 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2881 ldap library initialization, allowing self-signed CA's to be
2882 used. Also properly sets require_cert option later in code by
2883 using NULL (global ldap config) instead of ldap handle (per
2884 session). Bug diagnosis and testing by alxgomz.
2886 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2887 the src/util/ subdirectory.
2889 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2890 renamed to Transport Post Delivery Action by Jeremy Harris, as
2893 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2894 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2895 redis_servers = needs to be configured which will be used by the redis
2896 lookup. Patch from Warren Baker, of The Packet Hub.
2898 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2900 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2901 hostname or reverse DNS when processing a host list. Used suggestions
2902 from multiple comments on this bug.
2904 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2906 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2907 Missed a few lines, added it to make the runtest require no keyboard
2910 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2911 contains upper case chars. Make router use caseful_local_part.
2913 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2914 support when GnuTLS has been built with p11-kit.
2920 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2922 This, or similar/improved, will also be change PP/11 of 4.82.
2928 PP/01 Handle short writes when writing local log-files.
2929 In practice, only affects FreeBSD (8 onwards).
2930 Bugzilla 1053, with thanks to Dmitry Isaikin.
2932 NM/01 Bugzilla 949 - Documentation tweak
2934 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2937 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2939 PP/02 Implemented gsasl authenticator.
2941 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2943 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2944 `pkg-config foo` for cflags/libs.
2946 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2947 with rest of GSASL and with heimdal_gssapi.
2949 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2950 `pkg-config foo` for cflags/libs for the TLS implementation.
2952 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2953 properties get this fed in as external SSF. A number of robustness
2954 and debugging improvements to the cyrus_sasl authenticator.
2956 PP/08 cyrus_sasl server now expands the server_realm option.
2958 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2959 Patch by Jeremy Harris.
2961 PP/10 Added dbmjz lookup type.
2963 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2965 PP/12 MAIL args handles TAB as well as SP, for better interop with
2966 non-compliant senders.
2967 Analysis and variant patch by Todd Lyons.
2969 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2970 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2971 Patch from Dirk Mueller <dmueller@suse.com>
2973 PP/13 tls_peerdn now print-escaped for spool files.
2974 Observed some $tls_peerdn in wild which contained \n, which resulted
2975 in spool file corruption.
2977 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2978 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2979 or write after TLS renegotiation, which otherwise led to messages
2982 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2983 as a tracking header (ie: a signed header comes before the signature).
2984 Patch from Wolfgang Breyha.
2986 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2987 comma-sep list; embedded commas doubled.
2989 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2991 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2993 Report and patch from Dmitry Banschikov.
2995 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2996 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2997 failures. We appear to now support TLS1.1+ with Exim.
2999 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3000 lets Exim select keys and certificates based upon TLS SNI from client.
3001 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3002 before an outbound SMTP session. New log_selector, +tls_sni.
3004 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3005 NULL dereference. Report and patch from Alun Jones.
3007 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3008 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3009 Not seeing resolver debug output on NetBSD, but suspect this is a
3010 resolver implementation change.
3012 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3013 Left warnings. Added "eximon gdb" invocation mode.
3015 PP/21 Defaulting "accept_8bitmime" to true, not false.
3017 PP/22 Added -bw for inetd wait mode support.
3019 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3020 locate the relevant includes and libraries. Made this the default.
3022 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3023 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3025 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3026 This may cause build issues on older platforms.
3028 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3029 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3030 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3031 Added SNI support via GnuTLS too.
3032 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3034 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3036 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3037 Applied second patch from Janne, implementing suggestion to default
3038 multiple-strings-in-record handling to match SPF spec.
3040 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3042 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3043 read-only, out of scope).
3044 Patch from Wolfgang Breyha, report from Stuart Northfield.
3046 PP/29 Fix three issues highlighted by clang analyser static analysis.
3047 Only crash-plausible issue would require the Cambridge-specific
3048 iplookup router and a misconfiguration.
3049 Report from Marcin Mirosław.
3051 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3053 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3054 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3055 As part of this, removing so much warning spew let me fix some minor
3056 real issues in debug logging.
3058 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3059 assignment on my part. Fixed.
3061 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3062 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3063 Janne Snabb (who went above and beyond: thank you).
3065 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3066 string otherwise requires a connection and a bunch more work and it's
3067 relatively easy to get wrong. Should also expose TLS library linkage
3070 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3071 64-bit ${eval} (JH/03).
3073 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3074 GNU libc to support some of the 64-bit stuff, should not lead to
3075 conflicts. Defined before os.h is pulled in, so if a given platform
3076 needs to override this, it can.
3078 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3079 protection layer was required, which is not implemented.
3080 Bugzilla 1254, patch from Wolfgang Breyha.
3082 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3083 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3084 tls_dhparam take prime identifiers. Also unbreak combination of
3085 OpenSSL+DH_params+TLSSNI.
3087 PP/39 Disable SSLv2 by default in OpenSSL support.
3093 PP/01 Solaris build fix for Oracle's LDAP libraries.
3094 Bugzilla 1109, patch from Stephen Usher.
3096 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3098 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3101 TF/02 Fix a couple more cases where we did not log the error message
3102 when unlink() failed. See also change 4.74-TF/03.
3104 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3105 lock up or crash if it happened to be inside a call to libc when it
3106 got a SIGUSR1 from exiwhat.
3108 The SIGUSR1 handler appends the current process status to the process
3109 log which is later printed by exiwhat. It used to use the general
3110 purpose logging code to do this, but several functions it calls are
3111 not safe for signals.
3113 The new output code in the SIGUSR1 handler is specific to the process
3114 log, and simple enough that it's easy to inspect for signal safety.
3115 Removing some special cases also simplifies the general logging code.
3116 Removing the spurious timestamps from the process log simplifies
3119 TF/04 Improved ratelimit ACL condition.
3121 The /noupdate option has been deprecated in favour of /readonly which
3122 has clearer semantics. The /leaky, /strict, and /readonly update modes
3123 are mutually exclusive. The update mode is no longer included in the
3124 database key; it just determines when the database is updated. (This
3125 means that when you upgrade Exim will forget old rate measurements.)
3127 Exim now checks that the per_* options are used with an update mode that
3128 makes sense for the current ACL. For example, when Exim is processing a
3129 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3130 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3131 must specify per_mail/readonly. If you omit the update mode it defaults to
3132 /leaky where that makes sense (as before) or /readonly where required.
3134 The /noupdate option is now undocumented but still supported for
3135 backwards compatibility. It is equivalent to /readonly except that in
3136 ACLs where /readonly is required you may specify /leaky/noupdate or
3137 /strict/noupdate which are treated the same as /readonly.
3139 A useful new feature is the /count= option. This is a generalization
3140 of the per_byte option, so that you can measure the throughput of other
3141 aggregate values. For example, the per_byte option is now equivalent
3142 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3144 The per_rcpt option has been generalized using the /count= mechanism
3145 (though it's more complicated than the per_byte equivalence). When it is
3146 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3147 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3148 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3149 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3150 Note that using per_rcpt with a non-readonly update mode in more than
3151 one ACL will cause the recipients to be double-counted. (The per_mail
3152 and per_byte options don't have this problem.)
3154 The handling of very low rates has changed slightly. If the computed rate
3155 is less than the event's count (usually one) then this event is the first
3156 after a long gap. In this case the rate is set to the same as this event's
3157 count, so that the first message of a spam run is counted properly.
3159 The major new feature is a mechanism for counting the rate of unique
3160 events. The new per_addr option counts the number of different
3161 recipients that someone has sent messages to in the last time period. It
3162 behaves like per_rcpt if all the recipient addresses are different, but
3163 duplicate recipient addresses do not increase the measured rate. Like
3164 the /count= option this is a general mechanism, so the per_addr option
3165 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3166 example, measure the rate that a client uses different sender addresses
3167 with the options per_mail/unique=$sender_address. There are further
3168 details in the main documentation.
3170 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3172 TF/06 Removed a few PCRE remnants.
3174 TF/07 Automatically extract Exim's version number from tags in the git
3175 repository when doing development or release builds.
3177 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3178 Bugzilla 879. Patch from Paul Fisher.
3180 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3181 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3184 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3186 PP/05 Variable $av_failed, true if the AV scanner deferred.
3187 Bugzilla 1078. Patch from John Horne.
3189 PP/06 Stop make process more reliably on build failure.
3190 Bugzilla 1087. Patch from Heiko Schlittermann.
3192 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3193 Bugzilla 1089. Patch from Heiko Schlittermann.
3195 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3196 Bugzilla 1131. Patch from Holger Weiß.
3198 PP/09 Handle IPv6 addresses with SPF.
3199 Bugzilla 860. Patch from Wolfgang Breyha.
3201 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3203 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3206 PP/11 match_* no longer expand right-hand-side by default.
3207 New compile-time build option, EXPAND_LISTMATCH_RHS.
3208 New expansion conditions, "inlist", "inlisti".
3210 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3212 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3214 PP/14 fix log_write() format string regression from TF/03.
3215 Bugzilla 1152. Patch from Dmitry Isaikin.
3221 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3223 PP/02 Harmonised TLS library version reporting; only show if debugging.
3224 Layout now matches that introduced for other libraries in 4.74 PP/03.
3226 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3228 PP/04 New "dns_use_edns0" global option.
3230 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3233 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3234 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3236 TK/01 Updated PolarSSL code to 0.14.2.
3237 Bugzilla 1097. Patch from Andreas Metzler.
3239 PP/07 Catch divide-by-zero in ${eval:...}.
3240 Fixes bugzilla 1102.
3242 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3245 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3246 format-string attack -- SECURITY: remote arbitrary code execution.
3248 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3249 time unintentionally subject to list matching rules, letting the header
3250 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3251 arbitrary string expansion). This allowed for information disclosure.
3253 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3254 INT_MIN/-1 -- value coerced to INT_MAX.
3260 NM/01 Workaround for PCRE version dependency in version reporting
3263 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3264 This fixes portability to compilers other than gcc, notably
3265 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3267 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3268 makefiles for portability to HP-UX and POSIX correctness.
3270 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3271 Also via indented variable definition in the Makefile.
3272 (Debugging by Oliver Heesakkers).
3274 PP/02 Restore caching of spamd results with expanded spamd_address.
3275 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3277 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3278 Improves build reliability. Fix from: Frank Elsner
3280 NM/02 Fix wide character breakage in the rfc2047 coding
3281 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3283 NM/03 Allow underscore in dnslist lookups
3284 Fixes bug 1026. Patch from Graeme Fowler
3286 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3287 Code patches from Adam Ciarcinski of NetBSD.
3289 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3292 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3293 is logged, to avoid truncation. Patch from John Horne.
3295 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3296 Patch from Jakob Hirsch.
3298 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3299 SQL string expansion failure details.
3300 Patch from Andrey Oktyabrski.
3302 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3303 Patch from Simon Arlott.
3305 PP/09 New lookups functionality failed to compile on old gcc which rejects
3306 extern declarations in function scope.
3307 Patch from Oliver Fleischmann
3309 PP/10 Use sig_atomic_t for flags set from signal handlers.
3310 Check getgroups() return and improve debugging.
3311 Fixed developed for diagnosis in bug 927 (which turned out to be
3314 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3315 Patch from Mark Zealey.
3317 PP/12 Bugzilla 1056: Improved spamd server selection.
3318 Patch from Mark Zealey.
3320 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3321 Based on patch from Heiko Schlittermann.
3323 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3324 Patch from Uwe Doering, sign-off by Michael Haardt.
3326 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3327 variable declaration deep within a block. Bug and patch from
3330 PP/15 lookups-Makefile IRIX compatibility coercion.
3332 PP/16 Make DISABLE_DKIM build knob functional.
3334 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3335 Patch by Simon Arlott
3337 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3338 variable argument macros. Our copy now differs from upstream.
3344 TF/01 Failure to get a lock on a hints database can have serious
3345 consequences so log it to the panic log.
3347 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3348 controlled using the smtp_confirmation log selector.
3350 TF/03 Include the error message when we fail to unlink a spool file.
3352 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3353 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3354 for maintaining out-of-tree patches for some time.
3356 PP/01 Bugzilla 139: Documentation and portability issues.
3357 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3358 Handle per-OS dynamic-module compilation flags.
3360 PP/02 Let /dev/null have normal permissions.
3361 The 4.73 fixes were a little too stringent and complained about the
3362 permissions on /dev/null. Exempt it from some checks.
3363 Reported by Andreas M. Kirchwitz.
3365 PP/03 Report version information for many libraries, including
3366 Exim version information for dynamically loaded libraries. Created
3367 version.h, now support a version extension string for distributors
3368 who patch heavily. Dynamic module ABI change.
3370 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3371 privilege escalation vulnerability whereby the Exim run-time user
3372 can cause root to append content of the attacker's choosing to
3375 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3378 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3379 If dropping privileges for untrusted macros, we disabled normal logging
3380 on the basis that it would fail; for the Exim run-time user, this is not
3381 the case, and it resulted in successful deliveries going unlogged.
3382 Fixed. Reported by Andreas Metzler.
3388 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3389 only prepend for the Resent-* case. Fixes regression introduced in
3390 Exim 4.70 by NM/22 for Bugzilla 607.
3392 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3393 increasing numbers of administrators be bitten by this.
3395 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3397 PP/03 Bugzilla 994: added openssl_options main configuration option.
3399 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3401 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3403 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3405 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3406 without a peer certificate, leading to a segfault because of an
3407 assumption that peers always have certificates. Be a little more
3408 paranoid. Problem reported by Martin Tscholak.
3410 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3411 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3412 NB: ClamAV planning to remove STREAM in "middle of 2010".
3413 CL also introduces -bmalware, various -d+acl logging additions and
3414 more caution in buffer sizes.
3416 PP/09 Implemented reverse_ip expansion operator.
3418 PP/10 Bugzilla 937: provide a "debug" ACL control.
3420 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3422 PP/12 Bugzilla 973: Implement --version.
3424 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3426 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3428 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3430 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3431 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3432 ignore trailing whitespace.
3434 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3436 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3439 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3440 Notification from Dr Andrew Aitchison.
3442 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3443 ExtendedDetectionInfo response format.
3444 Notification from John Horne.
3446 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3449 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3450 XSL and documented dependency on system catalogs, with examples of how
3453 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3456 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3457 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3458 configuration file which is writeable by the Exim user or group.
3460 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3461 of configuration files to cover files specified with the -C option if
3462 they are going to be used with root privileges, not just the default
3465 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3466 option (effectively making it always true).
3468 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3469 files to be used while preserving root privileges.
3471 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3472 that rogue child processes cannot use them.
3474 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3475 run-time user, instead of root.
3477 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3478 Exim run-time user without dropping privileges.
3480 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3481 result string, instead of calling string_vformat() twice with the same
3484 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3485 for other users. Others should always drop root privileges if they use
3486 -C on the command line, even for a whitelisted configure file.
3488 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3490 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3496 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3497 $data_path, and $header_path variables; fixed documentation bugs and
3500 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3501 exipick to access non-standard spools, including the "frozen" queue
3504 NM/01 Bugzilla 965: Support mysql stored procedures.
3505 Patch from Alain Williams
3507 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3509 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3510 Patch from Andreas Metzler
3512 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3513 Patch from Kirill Miazine
3515 NM/05 Bugzilla 671: Added umask to procmail example.
3517 JJ/03 installed exipick 20100323.0, fixing doc bug
3519 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3520 directory. Notification and patch from Dan Rosenberg.
3522 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3524 TK/02 Improve log output when DKIM signing operation fails.
3526 MH/01 Treat the transport option dkim_domain as a colon separated
3527 list, not as a single string, and sign the message with each element,
3528 omitting multiple occurences of the same signer.
3530 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3531 Bugzilla 985, 986. Patch by Simon Arlott
3533 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3534 Patch by Simon Arlott
3536 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3537 MBX locking. Notification from Dan Rosenberg.
3543 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3545 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3547 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3549 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3551 NM/04 Bugzilla 915: Flag broken perl installation during build.
3557 TK/01 Added patch by Johannes Berg that expands the main option
3558 "spamd_address" if it starts with a dollar sign.
3560 TK/02 Write list of recipients to X-Envelope-Sender header when building
3561 the mbox-format spool file for content scanning (suggested by Jakob
3564 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3565 (http://www.dcc-servers.net/) support via dccifd. Activated by
3566 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3568 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3569 by Mark Daniel Reidel <mr@df.eu>.
3571 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3572 When building exim an external PCRE library is now needed -
3573 PCRE is a system library on the majority of modern systems.
3574 See entry on PCRE_LIBS in EDITME file.
3576 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3577 conversation. Added nologin parameter to request.
3578 Patch contributed by Kirill Miazine.
3580 TF/01 Do not log submission mode rewrites if they do not change the address.
3582 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3584 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3585 log files in place. Contributed by Roberto Lima.
3587 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3589 TF/03 Bugzilla 615: When checking the local_parts router precondition
3590 after a local_part_suffix or local_part_prefix option, Exim now
3591 does not use the address's named list lookup cache, since this
3592 contains cached lookups for the whole local part.
3594 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3595 Robert Millan. Documentation is in experimental-spec.txt.
3597 TF/04 Bugzilla 668: Fix parallel build (make -j).
3599 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3601 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3602 Patch provided by Jan Srzednicki.
3604 TF/05 Leading white space used to be stripped from $spam_report which
3605 wrecked the formatting. Now it is preserved.
3607 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3608 that they are available at delivery time.
3610 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3612 TF/08 TLS error reporting now respects the incoming_interface and
3613 incoming_port log selectors.
3615 TF/09 Produce a more useful error message if an SMTP transport's hosts
3616 setting expands to an empty string.
3618 NM/06 Bugzilla 744: EXPN did not work under TLS.
3619 Patch provided by Phil Pennock.
3621 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3622 Patch provided by Richard Godbee.
3624 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3625 acl_smtp_notquit, added index entry.
3627 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3628 Patch provided by Eugene Bujak.
3630 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3631 accept(). Patch provided by Maxim Dounin.
3633 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3634 Patch provided by Phil Pennock.
3636 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3638 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3639 Patch provided by Brad "anomie" Jorsch.
3641 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3642 Patch provided by Dean Brooks.
3644 TK/05 Add native DKIM support (does not depend on external libraries).
3646 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3647 Patch provided by Graeme Fowler.
3649 NM/16 Bugzilla 851: Documentation example syntax fix.
3651 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3653 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3656 NM/19 Bugzilla 745: TLS version reporting.
3657 Patch provided by Phil Pennock.
3659 NM/20 Bugzilla 167: bool: condition support.
3660 Patch provided by Phil Pennock.
3662 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3663 clients. Patch provided by Phil Pennock.
3665 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3666 Patch provided by Brad "anomie" Jorsch.
3668 NM/23 Bugzilla 687: Fix misparses in eximstats.
3669 Patch provided by Heiko Schlittermann.
3671 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3672 Patch provided by Heiko Schlittermann.
3674 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3675 plus update to original patch.
3677 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3679 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3680 Patch provided by David Brownlee.
3682 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3684 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3686 NM/30 Bugzilla 888: TLS documentation bugfixes.
3688 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3690 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3691 Unlike the original bugzilla I have changed all shell scripts in src tree.
3693 NM/33 Bugzilla 898: Transport filter timeout fix.
3694 Patch by Todd Rinaldo.
3696 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3697 Patch by Serge Demonchaux.
3699 NM/35 Bugzilla 39: Base64 decode bug fixes.
3700 Patch by Jakob Hirsch.
3702 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3704 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3706 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3708 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3714 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3715 ALT-N's libdkim that I have put here:
3716 http://duncanthrax.net/exim-experimental/
3718 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3719 were called 'true' and it seems that C99 defines that as a reserved
3720 keyword to be used with 'bool' variable types. That means you could
3721 not include C99-style headers which use bools without triggering
3722 build errors in sieve.c.
3724 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3725 as mailq or other aliases. Changed the --help handling significantly
3726 to do whats expected. exim_usage() emits usage/help information.
3728 SC/01 Added the -bylocaldomain option to eximstats.
3730 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3732 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3734 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3740 PH/01 Another patch from the Sieve maintainer.
3742 PH/02 When an IPv6 address is converted to a string for single-key lookup
3743 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3744 dots are used instead of colons so that keys in lsearch files need not
3745 contain colons. This was done some time before quoting was made available
3746 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3747 (notated using the quote facility) so as to distinguish them from IPv4
3748 keys. This meant that lookups for IP addresses in host lists did not work
3749 for iplsearch lookups.
3751 This has been fixed by arranging for IPv6 addresses to be expressed with
3752 colons if the lookup type is iplsearch. This is not incompatible, because
3753 previously such lookups could never work.
3755 The situation is now rather anomalous, since one *can* have colons in
3756 ordinary lsearch keys. However, making the change in all cases is
3757 incompatible and would probably break a number of configurations.
3759 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3762 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3763 conversion specification without a maximum field width, thereby enabling
3764 a rogue spamd server to cause a buffer overflow. While nobody in their
3765 right mind would setup Exim to query an untrusted spamd server, an
3766 attacker that gains access to a server running spamd could potentially
3767 exploit this vulnerability to run arbitrary code as the Exim user.
3769 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3770 $primary_hostname instead of what libspf2 thinks the hosts name is.
3772 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3773 a directory entry by the name of the lookup key. Previously, if a
3774 symlink pointed to a non-existing file or a file in a directory that
3775 Exim lacked permissions to read, a lookup for a key matching that
3776 symlink would fail. Now it is enough that a matching directory entry
3777 exists, symlink or not. (Bugzilla 503.)
3779 PH/03 The body_linecount and body_zerocount variables are now exported in the
3782 PH/04 Added the $dnslist_matched variable.
3784 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3785 This means they are set thereafter only if the connection becomes
3788 PH/06 Added the client_condition to authenticators so that some can be skipped
3789 by clients under certain conditions.
3791 PH/07 The error message for a badly-placed control=no_multiline_responses left
3792 "_responses" off the end of the name.
3794 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3796 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3797 (without spaces) instead of just copying the configuration text.
3799 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3801 PH/11 Added $max_received_linelength.
3803 PH/12 Added +ignore_defer and +include_defer to host lists.
3805 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3806 way in which PCRE > 7.0 is built.
3808 PH/14 Implemented queue_only_load_latch.
3810 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3811 MAIL command. The effect was to mangle the value on 64-bit systems.
3813 PH/16 Another patch from the Sieve maintainer.
3815 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3817 PH/18 If a system quota error occurred while trying to create the file for
3818 a maildir delivery, the message "Mailbox is full" was not appended to the
3819 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3820 only to a quota excession during the actual writing of the file.
3822 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3823 characters?) which causes problems in log lines. The DN values are now
3824 passed through string_printing() before being added to log lines.
3826 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3827 and InterBase are left for another time.)
3829 PH/21 Added message_body_newlines option.
3831 PH/22 Guard against possible overflow in moan_check_errorcopy().
3833 PH/23 POSIX allows open() to be a macro; guard against that.
3835 PH/24 If the recipient of an error message contained an @ in the local part
3836 (suitably quoted, of course), incorrect values were put in $domain and
3837 $local_part during the evaluation of errors_copy.
3843 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3844 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3847 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3848 issue a MAIL command.
3850 PH/02 In an ACL statement such as
3852 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3854 if a client was not listed at all, or was listed with a value other than
3855 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3856 the condition was not true (as it should be), so access was not denied.
3857 The bug was that the ! inversion was incorrectly passed on to the second
3858 item. This has been fixed.
3860 PH/03 Added additional dnslists conditions == and =& which are different from
3861 = and & when the dns lookup returns more than one IP address.
3863 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3864 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3866 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3867 FSYNC, which compiles an option called disable_fsync that allows for
3868 bypassing fsync(). The documentation is heavily laced with warnings.
3870 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3872 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3873 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3874 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3875 including adding "make clean"; (3) Added -fPIC when compiling the test
3876 dynamically loaded module, to get rid of a warning.
3878 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3879 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3880 = 0s. The bug is otherwise harmless.
3882 PH/07 There was a bug in the dovecot authenticator such that the value of
3883 $auth1 could be overwritten, and so not correctly preserved, after a
3884 successful authentication. This usually meant that the value preserved by
3885 the server_setid option was incorrect.
3887 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3889 PH/09 Installed PCRE release 7.0.
3891 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3892 run for batched SMTP input. It is now run at the start of every message
3893 in the batch. While fixing this I discovered that the process information
3894 (output by running exiwhat) was not always getting set for -bs and -bS
3895 input. This is fixed, and it now also says "batched" for BSMTP.
3897 PH/11 Added control=no_pipelining.
3899 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3900 patch, slightly modified), and move the expansion of helo_data till after
3901 the connection is made in the smtp transport (so it can use these
3904 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3906 PH/14 Added log_selector = +pid.
3908 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3910 PH/16 Add ${if forany and ${if forall.
3912 PH/17 Added dsn_from option to vary the From: line in DSNs.
3914 PH/18 Flush SMTP output before performing a callout, unless control =
3915 no_callout_flush is set.
3917 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3918 was true (the default) a successful delivery failed to delete the retry
3919 item, thus causing premature timeout of the address. The bug is now
3922 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3924 PH/21 Long custom messages for fakedefer and fakereject are now split up
3925 into multiline responses in the same way that messages for "deny" and
3926 other ACL rejections are.
3928 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3929 with slight modification.
3931 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3932 draft, changing the syntax and factoring some duplicate code".
3934 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3935 for deliveries of the second and subsequent messages over the same SMTP
3938 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3939 ${reduce, with only minor "tidies".
3941 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3943 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3944 expansion side effects.
3946 PH/27 When a message times out after an over-quota error from an Exim-imposed
3947 quota, the bounce message says "mailbox is full". This message was not
3948 being given when it was a system quota that was exceeded. It now should
3951 MH/03 Made $recipients available in local_scan(). local_scan() already has
3952 better access to the recipient list through recipients_list[], but
3953 $recipients can be useful in postmaster-provided expansion strings.
3955 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3956 in the case of a MAIL command with additional options following the
3957 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3958 were accidentally chopped off.
3960 PH/29 SMTP synchronization checks are implemented when a command is read -
3961 there is a check that no more input is waiting when there shouldn't be
3962 any. However, for some commands, a delay in an ACL can mean that it is
3963 some time before the response is written. In this time, more input might
3964 arrive, invalidly. So now there are extra checks after an ACL has run for
3965 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3966 pipelining has not been advertised.
3968 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3970 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3971 returned in the SMTP response when smtp_return_error_details was false.
3972 This has been fixed.
3974 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3975 instead of the C I/O that was originally supplied, because problems were
3976 reported on Solaris.
3978 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3979 Exim which did not show up earlier: it was assuming that a call to
3980 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3981 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3982 was a macro that became an assignment, so it seemed to work. This has
3983 changed to a proper function call with a void return, hence the compile
3984 error. Exim's code has been fixed.
3986 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3989 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3991 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3993 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3994 because it turns out to be too big or there is a timeout) there is no
3995 "Completed" line in the log. When some messages of this type were
3996 selected by exigrep, they were listed as "not completed". Others were
3997 picked up by some special patterns. I have improved the selection
3998 criteria to be more general.
4000 PH/38 The host_find_failed option in the manualroute router can now be set
4001 to "ignore", to completely ignore a host whose IP address cannot be
4002 found. If all hosts are ignored, the behaviour is controlled by the new
4003 host_all_ignored option.
4005 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4006 homing or because of multiple MX records with /mx) generated more than
4007 one IP address, and the following item turned out to be the local host,
4008 all the secondary addresses of the first item were incorrectly removed
4009 from the list, along with the local host and any following hosts (which
4010 is what is supposed to happen).
4012 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4013 whoever called Exim into the -H file. In the case of the daemon it was
4014 behaving confusingly. When first started, it used values for whoever
4015 started the daemon, but after a SIGHUP it used the Exim user (because it
4016 calls itself on a restart). I have changed the code so that it now always
4019 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4020 message are rejected with the same error (e.g. no authentication or bad
4021 sender address), and a DATA command is nevertheless sent (as can happen
4022 with PIPELINING or a stupid MUA), the error message that was given to the
4023 RCPT commands is included in the rejection of the DATA command. This is
4024 intended to be helpful for MUAs that show only the final error to their
4027 PH/42 Another patch from the Sieve maintainer.
4029 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4030 Eximstats - Fixed some broken HTML links and added missing column headers
4032 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4033 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4035 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4037 PH/43 Yet another patch from the Sieve maintainer.
4039 PH/44 I found a way to check for a TCP/IP connection going away before sending
4040 the response to the final '.' that terminates a message, but only in the
4041 case where the client has not sent further data following the '.'
4042 (unfortunately, this is allowed). However, in many cases there won't be
4043 any further data because there won't be any more messages to send. A call
4044 to select() can be used: if it shows that the input is "ready", there is
4045 either input waiting, or the socket has been closed. An attempt to read
4046 the next input character can distinguish the two cases. Previously, Exim
4047 would have sent an OK response which the client would never have see.
4048 This could lead to message repetition. This fix should cure that, at
4049 least in a lot of common cases.
4051 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4052 advertised in response to EHLO.
4058 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4059 fixed by 4.65/MH/01 (is this a record?) are fixed:
4061 (i) An empty string was always treated as zero by the numeric comparison
4062 operators. This behaviour has been restored.
4064 (ii) It is documented that the numeric comparison operators always treat
4065 their arguments as decimal numbers. This was broken in that numbers
4066 starting with 0 were being interpreted as octal.
4068 While fixing these problems I realized that there was another issue that
4069 hadn't been noticed. Values of message_size_limit (both the global option
4070 and the transport option) were treated as octal if they started with 0.
4071 The documentation was vague. These values are now always treated as
4072 decimal, and I will make that clear in the documentation.
4078 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4079 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4082 MH/01 Don't check that the operands of numeric comparison operators are
4083 integers when their expansion is in "skipping" mode (fixes bug
4084 introduced by 4.64-PH/07).
4086 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4087 child addresses, Exim now panics and dies. Previously, because the count
4088 is held in a short int, deliveries were likely to be lost. As such a
4089 large number of recipients for a single message is ridiculous
4090 (performance will be very, very poor), I have chosen to impose a limit
4091 rather than extend the field.
4097 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4098 leftover -K file (the existence of which was triggered by #402).
4099 While we were at it, introduced process PID as part of the -K
4100 filename. This should rule out race conditions when creating
4103 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4104 processing considerably. Previous code took too long for large mails,
4105 triggering a timeout which in turn triggers #401.
4107 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4108 in the DK code in transports.c. sendfile() is not really portable,
4109 hence the _LINUX specificness.
4111 TF/01 In the add_headers option to the mail command in an Exim filter,
4112 there was a bug that Exim would claim a syntax error in any
4113 header after the first one which had an odd number of characters
4116 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4117 callout verification, Exim cached a "reject" for the entire domain. This
4118 is correct for most verifications, but it is not correct for a recipient
4119 verification with use_sender or use_postmaster set, because in that case
4120 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4121 case of MAIL FROM:<> rejection from other early rejections (e.g.
4122 rejection of HELO). When verifying a recipient using a non-null MAIL
4123 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4124 Whatever the result of the callout, the value of the domain cache is
4125 left unchanged (for any other kind of callout, getting as far as trying
4126 RCPT means that the domain itself is ok).
4128 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4131 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4132 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4133 session, the daemon ignores ECONNECT errors and logs others; it now
4134 ignores EPIPE as well.
4136 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4137 (quoted-printable decoding).
4139 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4140 later the small subsequent patch to fix an introduced bug.
4142 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4144 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4146 PH/08 An error is now given if message_size_limit is specified negative.
4148 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4149 to be given (somewhat) arbitrary names.
4151 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4154 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4155 miscellaneous code fixes
4157 PH/10 Added the log_reject_target ACL modifier to specify where to log
4160 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4161 hostname. This is wrong, because it relates to the incoming message (and
4162 probably the interface on which it is arriving) and not to the outgoing
4163 callout (which could be using a different interface). This has been
4164 changed to use the value of the helo_data option from the smtp transport
4165 instead - this is what is used when a message is actually being sent. If
4166 there is no remote transport (possible with a router that sets up host
4167 addresses), $smtp_active_hostname is used.
4169 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4170 tweaks were necessary in order to get it to work (see also 21 below):
4171 (a) The code assumed that strncpy() returns a negative number on buffer
4172 overflow, which isn't the case. Replaced with Exim's string_format()
4174 (b) There were several signed/unsigned issues. I just did the minimum
4175 hacking in of casts. There is scope for a larger refactoring.
4176 (c) The code used strcasecmp() which is not a standard C function.
4177 Replaced with Exim's strcmpic() function.
4178 (d) The code set only $1; it now sets $auth1 as well.
4179 (e) A simple test gave the error "authentication client didn't specify
4180 service in request". It would seem that Dovecot has changed its
4181 interface. Fortunately there's a specification; I followed it and
4182 changed what the client sends and it appears to be working now.
4184 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4187 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4188 address A is aliased to B and C, where B exists and C does not. Without
4189 -v the output is "A verified" because verification stops after a
4190 successful redirection if more than one address is generated. However,
4191 with -v the child addresses are also verified. Exim was outputting "A
4192 failed to verify" and then showing the successful verification for C,
4193 with its parentage. It now outputs "B failed to verify", showing B's
4194 parentage before showing the successful verification of C.
4196 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4197 look up a TXT record in a specific list after matching in a combined
4200 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4201 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4202 they consult the DNS. I had assumed they would set it the way they
4203 wanted; and indeed my experiments on Linux seem to show that in some
4204 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4205 To be on the safe side, however, I have now made the interface to
4206 host_find_byname() similar to host_find_bydns(), with an argument
4207 containing the DNS resolver options. The host_find_byname() function now
4208 sets these options at its start, just as host_find_bydns() does. The smtp
4209 transport options dns_qualify_single and dns_search_parents are passed to
4210 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4211 of host_find_byname() use the default settings of RES_DEFNAMES
4212 (qualify_single) but not RES_DNSRCH (search_parents).
4214 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4215 spool_read_header() do less string testing, by means of a preliminary
4216 switch on the second character of optional "-foo" lines. (This is
4217 overdue, caused by the large number of possibilities that now exist.
4218 Originally there were few.) While I was there, I also converted the
4219 str(n)cmp tests so they don't re-test the leading "-" and the first
4220 character, in the hope this might squeeze out yet more improvement.
4222 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4223 flag allowing group syntax was set by the header_syntax check but not
4224 turned off, possible causing trouble later; (2) The flag was not being
4225 set at all for the header_verify test, causing "group"-style headers to
4226 be rejected. I have now set it in this case, and also caused header_
4227 verify to ignore an empty address taken from a group. While doing this, I
4228 came across some other cases where the code for allowing group syntax
4229 while scanning a header line wasn't quite right (mostly, not resetting
4230 the flag correctly in the right place). These bugs could have caused
4231 trouble for malformed header lines. I hope it is now all correct.
4233 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4234 with the "reply" argument non-NULL. The code, however (which originally
4235 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4236 but it didn't always do it. This confused somebody who was copying the
4237 code for some other use. I have removed all the tests.
4239 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4240 feature that was used to support insecure browsers during the U.S. crypto
4241 embargo. It requires special client support, and Exim is probably the
4242 only MTA that supported it -- and would never use it because real RSA is
4243 always available. This code has been removed, because it had the bad
4244 effect of slowing Exim down by computing (never used) parameters for the
4245 RSA_EXPORT functionality.
4247 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4248 authenticator to fail if there's a tab character in the incoming data
4249 (there should never be unless someone is messing about, as it's supposed
4250 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4251 if the connection is using TLS or if the remote IP is the same as the
4252 local IP, and the "valid-client-cert option" if a client certificate has
4255 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4256 authenticators. This can be used for authorization after authentication
4257 succeeds. (In the case of plaintext, it servers for both authentication
4260 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4261 if any retry times were supplied.
4263 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4264 connection, where there is no client IP address to check. In this
4265 situation, the verify now always succeeds.
4267 PH/25 Applied John Jetmore's -Mset patch.
4269 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4271 PH/27 In a string expansion for a processed (not raw) header when multiple
4272 headers of the same name were present, leading whitespace was being
4273 removed from all of them, but trailing whitespace was being removed only
4274 from the last one. Now trailing whitespace is removed from each header
4275 before concatenation. Completely empty headers in a concatenation (as
4276 before) are ignored.
4278 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4279 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4281 PH/29 [Removed. This was a change that I later backed out, and forgot to
4282 correct the ChangeLog entry (that I had efficiently created) before
4283 committing the later change.]
4285 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4286 address errors (4xx response to RCPT) over the same connection as other
4287 messages routed to the same hosts. Such deliveries are always "forced",
4288 so retry times are not inspected. This resulted in far too many retries
4289 for the affected addresses. The effect occurred only when there were more
4290 hosts than the hosts_max_try setting in the smtp transport when it had
4291 the 4xx errors. Those hosts that it had tried were not added to the list
4292 of hosts for which the message was waiting, so if all were tried, there
4293 was no problem. Two fixes have been applied:
4295 (i) If there are any address or message errors in an SMTP delivery, none
4296 of the hosts (tried or untried) are now added to the list of hosts
4297 for which the message is waiting, so the message should not be a
4298 candidate for sending over the same connection that was used for a
4299 successful delivery of some other message. This seems entirely
4300 reasonable: after all the message is NOT "waiting for some host".
4301 This is so "obvious" that I'm not sure why it wasn't done
4302 previously. Hope I haven't missed anything, but it can't do any
4303 harm, as the worst effect is to miss an optimization.
4305 (ii) If, despite (i), such a delivery is accidentally attempted, the
4306 routing retry time is respected, so at least it doesn't keep
4307 hammering the server.
4309 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4310 in ${readsocket because some servers need this prod.
4312 PH/32 Added some extra debug output when updating a wait-xxx database.
4314 PH/33 The hint "could be header name not terminated by colon", which has been
4315 given for certain expansion errors for a long time, was not being given
4316 for the ${if def:h_colon_omitted{... case.
4318 PH/34 The spec says: "With one important exception, whenever a domain list is
4319 being scanned, $domain contains the subject domain." There was at least
4320 one case where this was not true.
4322 PH/35 The error "getsockname() failed: connection reset by peer" was being
4323 written to the panic log as well as the main log, but it isn't really
4324 panic-worthy as it just means the connection died rather early on. I have
4325 removed the panic log writing for the ECONNRESET error when getsockname()
4328 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4329 runs only) independently of the message's sender address. This meant
4330 that, if the 4xx error was in fact related to the sender, a different
4331 message to the same recipient with a different sender could confuse
4332 things. In particular, this can happen when sending to a greylisting
4333 server, but other circumstances could also provoke similar problems.
4334 I have changed the default so that the retry time for these errors is now
4335 based a combination of the sender and recipient addresses. This change
4336 can be overridden by setting address_retry_include_sender=false in the
4339 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4340 remote server are returned as part of bounce messages. This was not
4341 happening for LMTP over a pipe (the lmtp transport), but now it is the
4342 same for both kinds of LMTP.
4344 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4345 in header lines that were in fact CNAMEs. This is no longer the case.
4347 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4348 and queue runs started by the daemon processed all messages. This has
4349 been fixed so that -R and -S can now usefully be given with -q<time>.
4351 PH/40 Import PCRE release 6.7 (fixes some bugs).
4353 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4355 PH/42 Give an error if -q is specified more than once.
4357 PH/43 Renamed the variables $interface_address and $interface_port as
4358 $received_ip_address and $received_port, to make it clear that these
4359 values apply to message reception, and not to the outgoing interface when
4360 a message is delivered. (The old names remain recognized, of course.)
4362 PH/44 There was no timeout on the connect() call when using a Unix domain
4363 socket in the ${readsocket expansion. There now is.
4365 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4366 be meaningful with "accept".
4368 SC/01 Eximstats V1.43
4369 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4371 SC/02 Eximstats V1.44
4372 Use a glob alias rather than an array ref in the generated
4373 parser. This improves both readability and performance.
4375 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4376 Collect SpamAssassin and rejection statistics.
4377 Don't display local sender or destination tables unless
4378 there is data to show.
4379 Added average volumes into the top table text output.
4381 SC/04 Eximstats V1.46
4382 Collect data on the number of addresses (recipients)
4383 as well as the number of messages.
4385 SC/05 Eximstats V1.47
4386 Added 'Message too big' to the list of mail rejection
4387 reasons (thanks to Marco Gaiarin).
4389 SC/06 Eximstats V1.48
4390 Mainlog lines which have GMT offsets and are too short to
4391 have a flag are now skipped.
4393 SC/07 Eximstats V1.49 (Alain Williams)
4394 Added the -emptyok flag.
4396 SC/08 Eximstats V1.50
4397 Fixes for obtaining the IP address from reject messages.
4399 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4400 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4401 whitespace changes from 4.64-PH/27
4403 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4406 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4407 are found, allow negative numbers in numeric criteria)
4409 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4411 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4412 to match changes made in 4.64-PH/43
4414 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4416 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4417 "domain" is actually an IP address, and force a failure. This locks out
4418 those revolvers/nameservers that support "A-for-A" lookups, in
4419 contravention of the specifications.
4421 PH/48 When a host name was looked up from an IP address, and the subsequent
4422 forward lookup of the name timed out, the host name was left in
4423 $sender_host_name, contrary to the specification.
4425 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4426 restricted to single-key lookups, Exim was not diagnosing an error if
4427 * or *@ was used with a query-style lookup.
4429 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4431 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4432 long ago, but noone interested enough thought of it. Let's just say that
4433 the "1.1" means that there are some new functions that weren't there at
4434 some point in the past.
4436 PH/51 Error processing for expansion failure of helo_data from an smtp
4437 transport during callout processing was broken.
4439 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4440 tested/used via the -bh/-bhc/-bs options.
4442 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4443 bug, fixed in subsequent PCRE releases).
4445 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4446 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4448 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4454 SC/01 Use a glob alias rather than an array ref in eximstats generated
4455 parser. This improves both readability and performance.
4457 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4458 Don't display local sender or destination tables in eximstats unless
4459 there is data to show.
4460 Added average volumes into the eximstats top table text output.
4462 SC/03 Collect data on the number of addresses (recipients) as well
4463 as the number of messages in eximstats.
4465 TF/01 Correct an error in the documentation for the redirect router. Exim
4466 does (usually) call initgroups() when daemonizing.
4468 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4469 with consistent privilege compared to when running as a daemon.
4471 TF/03 Note in the spec that $authenticated_id is not set for local
4472 submissions from trusted users.
4474 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4475 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4477 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4478 by adding some example configuration directives to the default
4479 configuration file. A little bit of work is required to uncomment the
4480 directives and define how usernames and passwords are checked, but
4481 there is now a framework to start from.
4483 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4484 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4485 without this. I don't know how relevant this is to other LDAP libraries.
4487 PH/02 Add the verb name to the "unknown ACL verb" error.
4489 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4491 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4493 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4494 directory not expanded when it should be if an expanded home directory
4495 was set for the address (which is overridden by the transport).
4497 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4500 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4501 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4502 because it is too late at that time, and has no effect.
4504 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4505 security issue with \' (bugzilla #107). I could not use the
4506 PQescapeStringConn() function, because it needs a PGconn value as one of
4509 PH/08 When testing addresses using -bt, indicate those final addresses that
4510 are duplicates that would not cause an additional delivery. At least one
4511 person was confused, thinking that -bt output corresponded to deliveries.
4512 (Suppressing duplicates isn't a good idea as you lose the information
4513 about possibly different redirections that led to the duplicates.)
4515 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4516 systems where poll() doesn't work, in particular OS X.
4518 PH/10 Added more information to debugging output for retry time not reached.
4520 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4521 operations in malware.c.
4523 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4526 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4527 syslog_duplication set false, log lines that would normally be written
4528 both the the main log and to the reject log were not written to syslog at
4531 PH/14 In the default configuration, change the use of "message" in ACL warn
4532 statements to "add_header".
4534 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4535 not followed by a command (e.g. "seen endif").
4537 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4538 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4541 PH/17 Added extra conditions to the default value of delay_warning_condition
4545 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4546 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4547 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4550 The Auto-Submitted: and various List- headers are standardised, whereas I
4551 don't think Precedence: ever was.
4553 PH/18 Refactored debugging code in route_finduser() to show more information,
4554 in particular, the error code if getpwnam() issues one.
4556 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4557 This is apparently needed in addition to the PH/07 change above to avoid
4558 any possible encoding problems.
4560 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4561 but not after initializing Perl.
4563 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4564 output them only if debugging. By default they are written stderr,
4565 apparently, which is not desirable.
4567 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4570 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4573 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4575 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4576 authenticated or an ident call has been made. Suppress the default
4577 values for $authenticated_id and $authenticated_sender (but permit -oMai
4578 and -oMas) when testing with -bh.
4580 PH/24 Re-jigged the order of the tests in the default configuration so that the
4581 tests for valid domains and recipients precede the DNS black list and CSA
4582 tests, on the grounds that those ones are more expensive.
4584 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4585 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4586 This bug exists in every version of Exim that I still have, right back to
4589 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4590 However, an attempt to turn on case-sensitivity in a regex key by
4591 including (?-i) didn't work because the subject string was already
4592 lowercased, and the effects were non-intuitive. It turns out that a
4593 one-line patch can be used to allow (?-i) to work as expected.
4599 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4600 other effects) broke the use of negated acl sub-conditions.
4602 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4605 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4606 "Deny" causes Exim to reject the incoming connection with a 554 error.
4607 Unfortunately, if there is a major crisis, such as a disk failure,
4608 tcp-wrappers gives "deny", whereas what one would like would be some
4609 kind of temporary error. A kludge has been added to help with this.
4610 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4611 554 error is used if errno is still zero or contains ENOENT (which occurs
4612 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4615 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4617 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4618 errors. Otherwise a message that provokes a temporary error (when other
4619 messages do not) can cause a whole host to time out.
4621 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4622 addresses were routed directly to files or pipes from a redirect router.
4623 File deliveries just didn't batch; pipe deliveries might have suffered
4626 PH/06 A failure to get a lock for a hints database would erroneously always say
4627 "Failed to get write lock", even when it was really a read lock.
4629 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4630 of 0600. This has been changed to use the value of the lockfile_mode
4631 option (which defaults to 0600).
4633 PH/08 Applied small patch from the Sieve maintainer.
4635 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4636 folder from quota calculations, a direct delivery into this folder messed
4637 up the contents of the maildirsize file. This was because the regex was
4638 used only to exclude .Trash (or whatever) when the size of the mailbox
4639 was calculated. There was no check that a delivery was happening into an
4640 excluded directory. This bug has been fixed by ignoring all quota
4641 processing for deliveries into excluded directories.
4643 PH/10 Added the maildirfolder_create_regex option to appendfile.
4649 PH/01 The code for finding all the local interface addresses on a FreeBSD
4650 system running IPv6 was broken. This may well have applied to all BSD
4651 systems, as well as to others that have similar system calls. The broken
4652 code found IPv4 interfaces correctly, but gave incorrect values for the
4653 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4654 that it would not match correctly against @[] and not recognize the IPv6
4657 PH/02 The ipliteral router was not recognizing addresses of the form user@
4658 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4660 PH/03 Added disable_ipv6.
4662 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4663 decoded form, because it is most often used to construct To: headers
4664 lines in autoreplies, and the decoded form may well be syntactically
4665 invalid. However, $reply_address has leading white space removed, and all
4666 newlines turned into spaces so that the autoreply transport does not
4669 PH/05 If group was specified without a user on a router, and no group or user
4670 was specified on a transport, the group from the router was ignored.
4672 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4673 for visible compile-time settings that can be used to change these
4674 numbers, for those that want even more. Backwards compatibility with old
4675 spool files has been maintained. However, going back to a previous Exim
4676 release will lost any variables that are in spool files.
4678 PH/07 Two small changes when running in the test harness: increase delay when
4679 passing a TCP/IP connection to a new process, in case the original
4680 process has to generate a bounce, and remove special handling of
4681 127.0.0.2 (sic), which is no longer necessary.
4683 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4684 be the same on different OS.
4686 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4689 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4690 whether --show-vars was specified or not
4692 JJ/02 exipick: Added support for new ACL variable spool format introduced
4695 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4696 syntactically invalid From: or Reply-to: line, and a filter used this to
4697 generate an autoreply, and therefore failed to obtain an address for the
4698 autoreply, Exim could try to deliver to a non-existent relative file
4699 name, causing unrelated and misleading errors. What now happens is that
4700 it logs this as a hard delivery error, but does not attempt to create a
4703 PH/11 The exinext utility has a -C option for testing purposes, but although
4704 the given file was scanned by exinext itself; it wasn't being passed on
4705 when Exim was called.
4707 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4708 an end-of-file indication when reading a command response.
4710 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4711 compiled. In many other places in Exim, IPv6 addresses are always
4712 recognized, so I have changed this. It also means that IPv4 domain
4713 literals of the form [IPV4:n.n.n.n] are now always recognized.
4715 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4716 used if the router is not running as root, for example, when verifying at
4717 ACL time, or when using -bh. The debugging output from this situation was
4718 non-existent - all you got was a failure to exec. I have made two
4721 (a) Failures to set uid/gid, the current directory, or a process leader
4722 in a subprocess such as that created by queryprogram now generate
4723 suitable debugging output when -d is set.
4725 (b) The queryprogram router detects when it is not running as root,
4726 outputs suitable debugging information if -d is set, and then runs
4727 the subprocess without attempting to change uid/gid.
4729 PH/15 Minor change to Makefile for building test_host (undocumented testing
4732 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4733 additional section of a DNS packet that returns MX or SRV records.
4734 Instead, it always explicitly searches for A/AAAA records. This avoids
4735 major problems that occur when a DNS server includes only records of one
4736 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4737 fixed another bug: if SRV records were looked up and the corresponding
4738 address records were *not* found in the additional section, the port
4739 values from the SRV records were lost.
4741 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4742 using the correct key (the original address) when searching the retry
4743 rules in order to find which one to use for generating the retry hint.
4745 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4746 adding the default one. Similarly, if it contains a Reply-To: header, the
4747 errors_reply_to option, if set, is not used.
4749 PH/19 When calculating a retry time, Exim used to measure the "time since
4750 failure" by looking at the "first failed" field in the retry record. Now
4751 it does not use this if it is later than than the arrival time of the
4752 message. Instead it uses the arrival time. This makes for better
4753 behaviour in cases where some deliveries succeed, thus re-setting the
4754 "first failed" field. An example is a quota failure for a huge message
4755 when small messages continue to be delivered. Without this change, the
4756 "time since failure" will always be short, possible causing more frequent
4757 delivery attempts for the huge message than are intended.
4758 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4760 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4761 $1, $2, $3) because the numerical variables can be reset during some
4762 expansion items (e.g. "match"), thereby losing the authentication data.
4764 PH/21 Make -bV show the size of off_t variables so that the test suite can
4765 decide whether to run tests for quotas > 2G.
4767 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4768 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4769 filecount value is greater than 2G or if a quota value is greater than 2G
4770 on a system where the size of off_t is not greater than 4, a panic error
4773 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4774 never match. The debug and -bh output now contains an explicit error
4775 message indicating a malformed IPv4 address or mask.
4777 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4778 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4779 PH/23 above applies.
4781 PH/25 Do not write to syslog when running in the test harness. The only
4782 occasion when this arises is a failure to open the main or panic logs
4783 (for which there is an explicit test).
4785 PH/26 Added the /no_tell option to "control=freeze".
4787 PH/27 If a host name lookup failed very early in a connection, for example, if
4788 the IP address matched host_lookup and the reverse lookup yielded a name
4789 that did not have a forward lookup, an error message of the form "no IP
4790 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4791 could be logged. Now it outputs the IP address instead of "NULL".
4793 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4794 allows the sender and the authenticated sender to be set when
4795 submitting a message from within Exim. Since child_open_exim() is
4796 documented for local_scan(), the new function should be too.
4798 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4799 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4800 results in an empty string is now treated as unset.
4802 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4804 PH/31 Added sender_verify_fail logging option.
4806 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4807 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4808 tidied the source and removed it altogether.
4810 PH/33 When a queue run was abandoned because the load average was too high, a
4811 log line was always written; now it is written only if the queue_run log
4812 selector is set. In addition, the log line for abandonment now contains
4813 information about the queue run such as the pid. This is always present
4814 in "start" and "stop" lines but was omitted from the "abandon" line.
4816 PH/34 Omit spaces between a header name and the colon in the error message that
4817 is given when verify = headers_syntax fails (if there are lots of them,
4818 the message gets confusing).
4820 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4821 names, as there are now some PTR records that contain slashes. This check
4822 is only to protect against broken name servers that fall over on strange
4823 characters, so the fact that it applies to all lookups doesn't matter.
4825 PH/36 Now that the new test suite is complete, we can remove some of the
4826 special code in Exim that was needed for the old test suite. For example,
4827 sorting DNS records because real resolvers return them in an arbitrary
4828 order. The new test suite's fake resolver always returns records in the
4831 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4832 bounces) except when queue_only is set, to avoid logging races between
4833 the different processes.
4835 PH/38 Panic-die if .include specifies a non-absolute path.
4837 PH/39 A tweak to the "H" retry rule from its user.
4839 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4840 a label. They prevented compilation on older perls.
4842 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4843 a warning to be raised on newish perls.
4845 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4846 on queue. Changes to match documented behaviour of showing count of
4847 messages matching specified criteria.
4849 PH/40 Changed the default ident timeout from 30s to 5s.
4851 PH/41 Added support for the use of login_cap features, on those BSD systems
4852 that have them, for controlling the resources used by pipe deliveries.
4854 PH/42 The content-scanning code uses fopen() to create files in which to put
4855 message data. Previously it was not paying any attention to the mode of
4856 the files. Exim runs with umask(0) because the rest of the code creates
4857 files with open(), and sets the required mode explicitly. Thus, these
4858 files were ending up world-writeable. This was not a big issue, because,
4859 being within the spool directory, they were not world-accessible. I have
4860 created a function called modefopen, which takes an additional mode
4861 argument. It sets umask(777), creates the file, chmods it to the required
4862 mode, then resets the umask. All the relevant calls to fopen() in the
4863 content scanning code have been changed to use this function.
4865 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4866 to 24 hours. This avoids potential overflow problems when processing G
4867 and H retry rules. I suspect nobody ever tinkers with this value.
4869 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4871 PH/45 When the plaintext authenticator is running as a client, the server's
4872 challenges are checked to ensure they are valid base64 strings. By
4873 default, the authentication attempt is cancelled if an invalid string is
4874 received. Setting client_ignore_invalid_base64 true ignores these errors.
4875 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4876 they are received. Thus, the responses can be made to depend on the
4877 challenges. If an invalid string is ignored, an empty string is placed in
4880 PH/46 Messages that are created by the autoreply transport now contains a
4881 References: header, in accordance with RFCs 2822 and 3834.
4883 PH/47 Added authenticated_sender_force to the smtp transport.
4885 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4887 PH/49 Installed latest patch from the Sieve maintainer.
4889 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4890 was also set, the appendfile transport was unnecessarily scanning a
4891 directory of message files (e.g. for maildir delivery) to find the count
4892 of files (along with the size), even though it did not need this
4893 information. It now does the scan only if it needs to find either the
4894 size of the count of files.
4896 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4898 PH/52 Two bugs concerned with error handling when the smtp transport is
4901 (i) Exim was not creating retry information for temporary errors given
4902 for individual recipients after the DATA command when the smtp transport
4903 was used in LMTP mode. This meant that they could be retried too
4904 frequently, and not timed out correctly.
4906 (ii) Exim was setting the flag that allows error details to be returned
4907 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4908 recipients that were returned after the DATA command.
4910 PH/53 This is related to PH/52, but is more general: for any failing address,
4911 when detailed error information was permitted to be returned to the
4912 sender, but the error was temporary, then after the final timeout, only
4913 "retry timeout exceeded" was returned. Now it returns the full error as
4914 well as "retry timeout exceeded".
4916 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4917 do this, and (what is worse) MTAs that accept it.
4919 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4920 will now be deprecated.
4922 PH/56 New os.c-cygwin from the Cygwin maintainer.
4924 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4925 formats (previously only available in exim formats via -bpr, -bpru,
4926 and -bpra. Now also available in native and exiqgrep formats)
4928 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4929 with very large, slow to parse queues
4931 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4933 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4935 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4936 responses to authentication challenges, though it was showing the
4937 challenges; (ii) I've removed the CR characters from the debug output for
4940 PH/58 Allow for the insertion of a newline as well as a space when a string
4941 is turned into more than one encoded-word during RFC 2047 encoding. The
4942 Sieve code now uses this.
4944 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4945 data_4xx, lost_connection, tls_required.
4947 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4948 message was being sent as an SMTP response.
4950 PH/61 Add -l and -k options to exicyclog.
4952 PH/62 When verifying, if an address was redirected to one new address, so that
4953 verification continued, and the new address failed or deferred after
4954 having set something in $address_data, the value of $address_data was not
4955 passed back to the ACL. This was different to the case when no
4956 redirection occurred. The value is now passed back in both cases.
4958 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4959 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4960 use login_cap.h, so on its own it isn't the distinguishing feature. The
4961 new name refers directly to the setclassresources() function.
4963 PH/65 Added configuration files for NetBSD3.
4965 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4967 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4968 is preferred over IPv4.
4970 PH/68 The bounce_return_message and bounce_return_body options were not being
4971 honoured for bounces generated during the reception of non-SMTP messages.
4972 In particular, this applied to messages rejected by the ACL. This bug has
4973 been fixed. However, if bounce_return_message is true and bounce_return_
4974 body is false, the headers that are returned for a non-SMTP message
4975 include only those that have been read before the error was detected.
4976 (In the case of an ACL rejection, they have all been read.)
4978 PH/69 The HTML version of the specification is now built in a directory called
4979 spec_html instead of spec.html, because the latter looks like a path with
4980 a MIME-type, and this confuses some software.
4982 PH/70 Catch two compiler warnings in sieve.c.
4984 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4985 function verify_get_ident() calls ip_connect() to connect a socket, but
4986 if the "connect()" function timed out, ip_connect() used to close the
4987 socket. However, verify_get_ident() also closes the socket later, and in
4988 between Exim writes to the log, which may get opened at this point. When
4989 the socket was closed in ip_connect(), the log could get the same file
4990 descriptor number as the socket. This naturally causes chaos. The fix is
4991 not to close the socket in ip_connect(); the socket should be closed by
4992 the function that creates it. There was only one place in the code where
4993 this was missing, in the iplookup router, which I don't think anybody now
4994 uses, but I've fixed it anyway.
4996 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4997 well as to direct DNS lookups. Otherwise the handling of names in host
4998 lists is inconsistent and therefore confusing.
5004 PH/01 Two changes to the default runtime configuration:
5006 (1) Move the checks for relay_from_hosts and authenticated clients from
5007 after to before the (commented out) DNS black list checks.
5009 (2) Add control=submission to the relay_from_hosts and authenticated
5010 clients checks, on the grounds that messages accepted by these
5011 statements are most likely to be submissions.
5013 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5015 (1) Generate an error if the third argument for the ${prvs expansion is
5018 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5021 (3) Reset the variables that are obtained from the first argument of
5022 ${prvscheck and used in the second argument before leaving the code,
5023 because their memory is reclaimed, so using them afterwards may do
5026 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5027 one (it's much easier than Tom thought :-).
5029 (5) Because of (4), we can now allow for the use of $prvscheck_result
5030 inside the third argument.
5032 PH/03 For some reason, the default setting of PATH when running a command from
5033 a pipe transport was just "/usr/bin". I have changed it to
5036 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5037 anything to be listed in the output from -bV.
5039 PH/05 When a filter generated an autoreply, the entire To: header line was
5040 quoted in the delivery log line, like this:
5042 => >A.N.Other <ano@some.domain> <original@ddress> ...
5044 This has been changed so that it extracts the operative address. There
5045 may be more than one such address. If so, they are comma-separated, like
5048 => >ano@some.domain,ona@other.domain <original@ddress> ...
5050 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5051 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5052 not being looked up in the rDNS to get a host name, Exim was showing the
5053 IP address twice in Received: lines, even though the IP addresses were
5054 identical. For example:
5056 Received: from [1.2.3.4] (helo=[1.2.3.4])
5058 However, if the real host name was known, it was omitting the HELO data
5059 if it matched the actual IP address. This has been tidied up so that it
5060 doesn't show the same IP address twice.
5062 PH/07 When both +timestamp and +memory debugging was on, the value given by
5063 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5064 called by the debug printing, thereby overwriting the timestamp buffer.
5065 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5067 PH/08 When the original message was included in an autoreply transport, it
5068 always said "this is a copy of the message, including all the headers",
5069 even if body_only or headers_only was set. It now gives an appropriate
5072 PH/09 Applied a patch from the Sieve maintainer which:
5074 o fixes some comments
5075 o adds the (disabled) notify extension core
5076 o adds some debug output for the result of if/elsif tests
5077 o points to the current vacation draft in the documentation
5078 and documents the missing references header update
5082 o fixes a bug in processing the envelope test (when testing
5083 multiple envelope elements, the last element determined the
5086 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5087 Electronic Mail") by including:
5089 Auto-submitted: auto-generated
5091 in the messages that it generates (bounce messages and others, such as
5092 warnings). In the case of bounce messages for non-SMTP messages, there was
5093 also a typo: it was using "Auto_submitted" (underscore instead of
5094 hyphen). Since every message generated by Exim is necessarily in response
5095 to another message, thes have all been changed to:
5097 Auto-Submitted: auto-replied
5099 in accordance with these statements in the RFC:
5101 The auto-replied keyword:
5103 - SHOULD be used on messages sent in direct response to another
5104 message by an automatic process,
5106 - MUST NOT be used on manually-generated messages,
5108 - MAY be used on Delivery Status Notifications (DSNs) and Message
5109 Disposition Notifications (MDNs),
5111 - MUST NOT be used on messages generated by automatic or periodic
5112 processes, except for messages which are automatic responses to
5115 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5116 to the default Received: header definition.
5118 PH/12 Added log selector acl_warn_skipped (default on).
5120 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5121 variables because (a) they are in the wrong storage pool and (b) even if
5122 they were copied, it wouldn't work properly because of the caching.
5124 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5125 checking when decoding. Apparently there are clients that generate
5126 overlong encoded strings. Why am I not surprised?
5128 PH/15 If the first argument of "${if match_address" was not empty, but did not
5129 contain an "@" character, Exim crashed. Now it writes a panic log message
5130 and treats the condition as false.
5132 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5134 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5135 extension "envelope-auth". The code is finished and in agreement with
5136 other implementations, but there is no documentation so far and in fact,
5137 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5138 not changing the active code.
5140 Print executed "if" and "elsif" statements when debugging is used. This
5141 helps a great deal to understand what a filter does.
5143 Document more things not specified clearly in RFC3028. I had all this
5144 sorted out, when out of a sudden new issues came to my mind. Oops."
5146 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5149 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5150 canonical form (as documented). However, after a host name lookup from
5151 the IP address, check_host() was doing a simple string comparison with
5152 addresses acquired from the DNS when checking that the found name did
5153 have the original IP as one of its addresses. Since any found IPv6
5154 addresses are likely to be in abbreviated form, the comparison could
5155 fail. Luckily, there already exists a function for doing the comparison
5156 by converting both addresses to binary, so now that is used instead of
5157 the text comparison.
5159 PH/20 There was another similar case to PH/19, when a complete host name was
5160 given in a host list; looking up its IP address could give an abbreviated
5161 form, whereas the current host's name might or might not be abbreviated.
5162 The same fix has been applied.
5168 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5169 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5172 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5173 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5175 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5177 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5178 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5179 Also, for "Auto-Submitted", treat anything other than "no" as
5180 non-personal, in accordance with RFC 3834. (Previously it treated
5181 anything starting "auto-" as non-personal.)
5183 TF/01 The control=submission/name=... option had a problem with syntax
5184 errors if the name included a slash character. The /name= option
5185 now slurps the rest of the string, so it can include any characters
5186 but it must come last in the list of options (after /sender_retain
5189 PH/05 Some modifications to the interface to the fake nameserver for the new
5197 TK/01 Added the "success_on_redirect" address verification option. See
5198 NewStuff for rationale and an example.
5200 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5202 PH/02 Patch to exigrep to allow it to work on syslog lines.
5204 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5205 fread() to skip over the body file's header line, because in Cygwin the
5206 header line is locked and is inaccessible.
5208 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5209 co-exist for some time) to make it clear that it is the Exim ID that is
5210 referenced, not the Message-ID: header line.
5212 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5213 string_format() function, because snprintf() does not exist on all
5216 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5217 ${stat: expansion item.
5219 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5220 protocol synchronization error", to keep the pedants happy.
5222 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5223 well as for IRIX systems, when gcc is being used. See the host.c source
5226 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5228 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5231 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5232 transport and to the smtp transport in LMTP mode.
5234 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5236 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5237 run a filter in a subprocess. This could lead to confusion in subsequent
5238 lookups in the parent process. There should also be a search_tidyup() at
5239 the end of the subprocess.
5241 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5242 only if the host matched helo_try_verify_hosts, which caused the
5243 verification to occur when the EHLO/HELO command was issued. The ACL just
5244 tested the remembered result. Now, if a previous verification attempt has
5245 not happened, "verify = helo" does it there and then.
5247 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5249 TK/03 Fix log output including CR from clamd.
5251 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5252 exist provoked a memory error which could cause a segfault.
5254 PH/15 Installed PCRE 6.2
5256 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5258 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5259 of the problem. Specifically, suggested +O2 rather than +O1 for the
5262 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5264 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5265 record, the port was not correctly logged when the outgoing_port log
5266 selector was set (it logged the transort's default port).
5268 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5269 fallback_hosts, and "hosts" in the smtp transport.
5271 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5272 host errors such as "Connection refused".
5274 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5275 authentication with radiusclient 0.4.9:
5277 - Error returned from rc_read_config was caught wrongly
5278 - Username/password not passed on to radius server due to wrong length.
5280 The presumption is that some radiusclient API changes for 4.51/PH/17
5281 were not taken care of correctly. The code is still untested by me (my
5282 Linux distribution still has 0.3.2 of radiusclient), but it was
5283 contributed by a Radius user.
5285 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5286 expanding the "port" option of the smtp transport.
5288 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5289 while reading a MIME header. Thanks to Tom Hughes for a patch.
5291 PH/24 Include config.h inside local_scan.h so that configuration settings are
5294 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5295 that in an ACL for RCPT (for example), you can examine exactly what was
5298 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5299 commands, but it was not correctly comparing the address with the actual
5300 client host address. Thus, it would show the EHLO address in Received:
5301 header lines when this was not necessary.
5303 PH/27 Added the % operator to ${eval:}.
5305 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5306 it should be ignoring failures (because with -C, for example, it has lost
5307 privilege). It wasn't ignoring creation failures other than "already
5310 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5313 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5314 because an input line was too long, either on its own, or by virtue of
5315 too many continuations, the temporary file was not being removed, and the
5316 return code was incorrect.
5318 PH/31 Missing "BOOL" in function definition in filtertest.c.
5320 PH/32 Applied Sieve patches from the maintainer.
5322 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5324 PH/33 Added "verify = not_blind".
5326 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5327 Local/Makefile (with some defaults set). These are used in built scripts
5328 such as exicyclog, but they have never been used in the exim_install
5329 script (though there are many overriding facilities there). I have
5330 arranged that the exim_install script now takes note of these two
5333 PH/35 Installed configuration files for Dragonfly.
5335 PH/36 When a locally submitted message by a trusted user did not contain a
5336 From: header, and the sender address was obtained from -f or from an SMTP
5337 MAIL command, and the trusted user did not use -F to supply a sender
5338 name, $originator_name was incorrectly used when constructing a From:
5339 header. Furthermore, $originator_name was used for submission mode
5340 messages from external hosts without From: headers in a similar way,
5341 which is clearly wrong.
5343 PH/37 Added control=suppress_local_fixups.
5345 PH/38 When log_selector = +received_sender was set, and the addition of the
5346 sender made the log line's construction buffer exactly full, or one byte
5347 less than full, an overflow happened when the terminating "\n" was
5350 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5351 when the result of a list match is failure because a DNS lookup failed.
5353 PH/40 RM_COMMAND is now used in the building process.
5355 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5356 the "build-* directories that it finds.
5358 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5359 address in a domain literal was a prefix of an interface address.
5361 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5362 when verifying a sender address, unless rewrite_headers is false.
5364 PH/44 Wrote a long comment about why errors_to addresses are verified as
5365 recipients, not senders.
5367 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5368 the ratelimit ACL was added.
5370 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5372 PH/46 Added extra information about PostgreSQL errors to the error string.
5374 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5375 avoiding the need to install special zones in a real server. This is
5376 backwards compatible; if it can't find the fake resolver, it drops back.
5377 Thus, both old and new test suites can be run.
5379 TF/02 Added util/ratelimit.pl
5381 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5382 clock is set back in time.
5384 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5385 Candler <B.Candler@pobox.com>.
5387 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5388 OK for addresses that are the result of redirections.
5390 PH/48 A number of further additions for the benefit of the new test suite,
5391 including a fake gethostbyname() that interfaces to the fake DNS resolver
5394 TF/06 The fix for widen_domains has also been applied to qualify_single and
5395 search_parents which are the other dnslookup options that can cause
5398 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5401 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5403 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5404 service" if it encountered an MX record with an empty target hostname.
5405 The message is now "an MX or SRV record indicated no SMTP service".
5407 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5408 if the DNS of the sending site is misconfigured. This is quite a
5409 common situation. This change restores the behaviour of treating a
5410 helo verification defer as a failure.
5412 PH/51 If self=fail was set on a router, the bounce message did not include the
5413 actual error message.
5419 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5421 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5422 command itself ended in error, the underlying message about the transport
5423 filter timeout was being overwritten with the pipe command error. Now the
5424 underlying error message should be appended to the second error message.
5426 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5428 PH/02 Reduce the amount of output that "make" produces by default. Full output
5429 can still be requested.
5431 PH/03 The warning log line about a condition test deferring for a "warn" verb
5432 was being output only once per connection, rather than after each
5433 occurrence (because it was using the same function as for successful
5434 "warn" verbs). This seems wrong, so I have changed it.
5436 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5437 it should not have, which might have caused a crash in the right
5438 circumstances, but probably never did.
5440 PH/04 Installed a modified version of Tony Finch's patch to make submission
5441 mode fix the return path as well as the Sender: header line, and to
5442 add a /name= option so that you can make the user's friendly name appear
5445 TF/03 Added the control = fakedefer ACL modifier.
5447 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5448 Mark Lowes for thorough testing.
5450 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5452 TK/03 Merged latest SRS patch from Miles Wilton.
5454 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5455 with the definition in sysexits.h (which is #included earlier).
5456 Fortunately, Exim does not actually use EX_OK. The code used to try to
5457 preserve the sysexits.h value, by assuming that macro definitions were
5458 scanned for macro replacements. I have been disabused of this notion,
5459 so now the code just undefines EX_OK before #including unistd.h.
5461 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5462 in the smtp transport. When a block could not be written in a single
5463 write() function, the timeout was being re-applied to each part-write.
5464 This seems wrong - if the receiver was accepting one byte at a time it
5465 would take for ever. The timeout is now adjusted when this happens. It
5466 doesn't have to be particularly precise.
5468 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5469 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5471 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5472 without a domain if the check to <postmaster@domain> fails.
5474 SC/01 Eximstats: added -xls and the ability to specify output files
5475 (patch written by Frank Heydlauf).
5477 SC/02 Eximstats: use FileHandles for outputting results.
5479 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5481 SC/04 Eximstats: fixed display of large numbers with -nvr option
5483 SC/05 Eximstats: fixed merging of reports with empty tables.
5485 SC/06 Eximstats: added the -include_original_destination flag
5487 SC/07 Eximstats: removed tabs and trailing whitespace.
5489 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5491 TK/06 MBOX spool code: Add real "From " MBOX separator line
5492 so the .eml file is really in mbox format (even though
5493 most programs do not really care). Patch from Alex Miller.
5495 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5496 The latter is generated from $received_to and is only set if the
5497 message has one envelope recipient. SA can use these headers,
5498 obviously out-of-the-box. Patch from Alex Miller.
5500 PH/08 The ${def test on a variable was returning false if the variable's
5501 value was "0", contrary to what the specification has always said!
5502 The result should be true unless the variable is empty.
5504 PH/09 The syntax error of a character other than { following "${if
5505 def:variable_name" (after optional whitespace) was not being diagnosed.
5506 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5507 accidental colon was present, for example, could give incorrect results.
5509 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5510 result is used (not including appendfile, where other changes are about
5513 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5514 This involved changing a lot of size variables from int to off_t. It
5515 should work with maildirs and everything.
5517 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5518 spamd dying while we are connected to it.
5520 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5523 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5524 function for BDB 4.3.
5526 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5528 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5529 the sources for PCRE have been re-arranged and more files are now
5532 PH/15 The code I had for printing potentially long long variables in PH/11
5533 above was not the best (it lost precision). The length of off_t variables
5534 is now inspected at build time, and an appropriate printing format (%ld
5535 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5536 to be "long long int" or "long int". This is needed for the internal
5537 formatting function string_vformat().
5539 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5540 the configuration file to be ":syslog", then the script "guesses" where
5541 the logs files are, rather than using the compiled in default. In our
5542 case the guess is not the same as the compiled default, so the script
5543 suddenly stopped working when I started to use syslog. The patch checks
5544 to see if log_file_path is "". If so, it attempts to read it from exim
5545 with no configuration file to get the compiled in version, before it
5546 falls back to the previous guessing code."
5548 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5549 implementing BATV in an Exim configuration. See NewStuff for the gory
5552 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5553 Makefile that are specific to HP-UX.
5555 PH/18 If the "use_postmaster" option was set for a recipient callout together
5556 with the "random" option, the postmaster address was used as the MAIL
5557 FROM address for the random test, but not for the subsequent recipient
5558 test. It is now used for both.
5560 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5561 patch removes a few documentation additions to RFC 3028, because the
5562 latest draft now contains them. It adds the new en;ascii-case comparator
5563 and a new error check for 8bit text in MIME parts. Comparator and
5564 require names are now matched exactly. I enabled the subaddress
5565 extension, but it is not well tested yet (read: it works for me)."
5567 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5568 rework some of the code of TK/09 above to avoid the hardwired use of
5569 "%lld" and "long long". Replaced the call to snprintf() with a call to
5572 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5573 records point to non-existent hosts", "retry timeout exceeded", and
5574 "retry time not reached for any host after a long failure period".
5576 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5577 experimental DomainKeys support:
5579 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5580 (2) On an error such as an illegally used "control", the wrong name for
5581 the control was given.
5583 These problems did NOT occur unless DomainKeys support was compiled.
5585 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5587 PH/24 Added ${if match_ip condition.
5589 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5590 databases so that it will be absolutely obvious if a crash occurs in the
5591 DB library. This is a regular occurrence (often caused by mis-matched
5594 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5595 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5596 picked up on a user's system that detects such things. There doesn't seem
5597 to be a gcc warning option for this - only an attribute that has to be
5598 put on the function's prototype. It seems that in Fedora Core 4 they have
5599 set this on a number of new functions. No doubt there will be more in due
5602 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5603 specify a transport. However, if an address that was verified by such a
5604 router was the subject of a callout, Exim crashed because it tried to
5605 read the rcpt_include_affixes from the non-existent transport. Now it
5606 just assumes that the setting of that option is false. This bug was
5607 introduced by 4.51/PH/31.
5609 PH/28 Changed -d+all to exclude +memory, because that information is very
5610 rarely of interest, but it makes the output a lot bigger. People tend to
5611 do -d+all out of habit.
5613 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5614 code in os-type was giving problems when libc.so lives in lib64, like on
5617 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5618 aren't the modern standard, and it seems that some systems' include files
5619 don't always have them. Exim was already checking for some of the newer
5620 ones like T_AAAA, and defining it itself. I've added checks for all the
5621 record types that Exim uses.
5623 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5624 not automatically generating a new one, as it is supposed to. This
5625 prevented TLS from working. If the file did exist, but contained invalid
5626 data, a new version was generated, as expected. It was only the case of a
5627 non-existent file that was broken.
5629 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5630 with a change in libdomainkeys > 0.64.
5632 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5633 from DNS. If the selector record carries the flag, it now has
5634 precedence over the domain-wide flag.
5636 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5638 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5639 the use of a port name that isn't defined in /etc/services) occurred, the
5640 message was deferred as in a normal delivery, and thus remained on the
5641 spool, instead of being failed because of the mua_wrapper setting. This
5642 is now fixed, and I tidied up some of the mua_wrapper messages at the
5645 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5646 the messages in a hash of arrays rather than using individual hashes.
5647 This is a bit cleaner and results in dramatic memory savings, albeit
5648 at a slight CPU cost.
5650 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5651 as requested by Marc Sherman.
5653 SC/10 Eximstats: added histograms for user specified patterns as requested
5656 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5658 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5659 fopen() in the content-scanning modules that did not already have it.
5665 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5666 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5668 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5670 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5672 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5673 to test Sieve filters that use "vacation".
5675 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5676 that changes the way the GnuTLS parameters are stored in the cache file.
5677 The new format can be generated externally. For backward compatibility,
5678 if the data in the cache doesn't make sense, Exim assumes it has read an
5679 old-format file, and it generates new data and writes a new file. This
5680 means that you can't go back to an older release without removing the
5683 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5684 work if there are any delivery delays because "one_time" forces the
5685 parent to be marked "delivered", so its unseen clone is never tried
5686 again. For this reason, Exim now forbids the simultaneous setting of
5689 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5690 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5691 entry if you want to know the details. The fix, however, neglected to
5692 consider the case when local delivery batching is involved. The test for
5693 "previously delivered" was not happening when checking to see if an
5694 address could be batched with a previous (undelivered) one; under
5695 certain circumstances this could lead to multiple deliveries to the same
5698 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5699 in its include files, and this causes problems building Exim.
5701 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5702 header_syntax) but Exim was just ignoring anything given after a slash.
5703 In particular, this caused confusion with an attempt to use "verify =
5704 reverse_host_lookup/defer_ok". An error is now given when options are
5705 supplied for verify items that do not have them. (Maybe reverse_host_
5706 lookup should have a defer_ok option, but that's a different point.)
5708 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5709 defined by RFC 821) to 2048, because there were problems with some AUTH
5710 commands, and RFC 1869 says the size should be increased for extended
5711 SMTP commands that take arguments.
5713 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5716 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5717 "unknown" error; now it says that the functionality isn't in the binary.
5719 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5720 an address' error message when a string expansion fails (syntax or
5721 whatever). Otherwise the password may appear in the log. Following change
5722 PH/42 below, there is no longer a chance of it appearing in a bounce
5725 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5727 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5728 of its addresses was ever tried. (Bugzilla bug #2.)
5730 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5731 the result incorrectly in the debug output. (It correctly added a newline
5732 to what was transported.)
5734 TF/01 Added $received_time.
5736 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5737 commented out examples of how to interface to a virus scanner and to
5738 SpamAssassin. Also added commented examples of av_scanner and
5739 spamd_address settings.
5741 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5742 and controls are allowed in which ACLs. There were a couple of minor
5743 errors. Some of the entries in the conditions table (which is a table of
5744 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5745 negation of where the condition IS allowed.
5747 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5749 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5750 header file does not have a version number, so I've had to invent a new
5751 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5752 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5753 radiusclient), but it was contributed by a Radius user.
5755 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5756 files or directories, for OpenSSL.
5758 PH/19 When an Exim process that is running as root has to create an Exim log
5759 file, it does so in a subprocess that runs as exim:exim so as to get the
5760 ownership right at creation (otherwise, other Exim processes might see
5761 the file with the wrong ownership). There was no test for failure of this
5762 fork() call, which would lead to the process getting stuck as it waited
5763 for a non-existent subprocess. Forks do occasionally fail when resources
5764 run out. I reviewed all the other calls to fork(); they all seem to check
5767 PH/20 When checking for unexpected SMTP input at connect time (before writing
5768 the banner), Exim was not dealing correctly with a non-positive return
5769 from the read() function. If the client had disconnected by this time,
5770 the result was a log entry for a synchronization error with an empty
5771 string after "input=" when read() returned zero. If read() returned -1
5772 (an event I could not check), uninitialized data bytes were printed.
5773 There were reports of junk text (parts of files, etc) appearing after
5776 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5778 PH/22 Added support for macro redefinition, and (re)definition in between
5779 driver and ACL definitions.
5781 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5782 forgetting to use the resulting value; it was using the unexpanded value.
5784 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5785 hadn't been configured. The fix is from Juergen Kreileder, who
5786 understands it better than I do:
5788 "Here's what I see happening with three configured cyrus_sasl
5789 authenticators configured (plain, login, cram-md5):
5791 On startup auth_cyrus_sasl_init() gets called for each of these.
5792 This means three calls to sasl_listmech() without a specified mech_list.
5793 => SASL tests which mechs of all available mechs actually work
5794 => three warnings about OTP not working
5795 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5797 With the patch, sasl_listmech() also gets called three times. But now
5798 SASL's mech_list option is set to the server_mech specified in the the
5799 authenticator. Or in other words, the answer from sasl_listmech()
5800 gets limited to just the mech you're testing for (which is different
5802 => the return list contains just 'plain' or 'login', 'cram-md5' or
5803 nothing depending on the value of ob->server_mech.
5805 I've just tested the patch: Authentication still works fine,
5806 unavailable mechs specified in the exim configuration are still
5807 caught, and the auth.log warnings about OTP are gone."
5809 PH/25 When debugging is enabled, the contents of the command line are added
5810 to the debugging output, even when log_selector=+arguments is not
5813 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5814 answer is "GNU", and only if the return is "GNU/something" is the answer
5817 PH/27 $acl_verify_message is now set immediately after the failure of a
5818 verification in an ACL, and so is available in subsequent modifiers. In
5819 particular, the message can be preserved by coding like this:
5821 warn !verify = sender
5822 set acl_m0 = $acl_verify_message
5824 Previously, $acl_verify_message was set only while expanding "message"
5825 and "log_message" when a very denied access.
5827 PH/28 Modified OS/os.c-Linux with
5829 -#ifndef OS_LOAD_AVERAGE
5830 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5832 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5833 nomenclature these days.)
5835 PH/29 Installed patch from the Sieve maintainer that adds the options
5836 sieve_useraddress and sieve_subaddress to the redirect router.
5838 PH/30 In these circumstances:
5839 . Two addresses routed to the same list of hosts;
5840 . First host does not offer TLS;
5841 . First host accepts first address;
5842 . First host gives temporary error to second address;
5843 . Second host offers TLS and a TLS session is established;
5844 . Second host accepts second address.
5845 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5846 and peerdn, if requested) that were in fact used only for the second
5849 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5850 attention to any local part prefix or suffix that was matched by the
5851 router that accepted the address. It now behaves in the same way as it
5852 does for delivery: the affixes are removed from the local part unless
5853 rcpt_include_affixes is set on the transport.
5855 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5856 timeout during the DATA phase of an incoming message.
5858 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5859 applied a patch sanctioned by the Sieve maintainer.
5861 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5862 the uid or gid is negative. A case of a negative gid caused this to be
5863 noticed. The fix allows for either to be negative.
5865 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5866 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5869 PH/36 The change PH/12 above was broken. Fixed it.
5871 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5872 the grounds that routing the same address twice would always produce the
5873 same answer. This might have been true once, but it is certainly no
5874 longer true now. Routing a child address may depend on the previous
5875 routing that produced that child. Some complicated redirection strategies
5876 went wrong when messages had multiple recipients, and made Exim's
5877 behaviour dependent on the order in which the addresses were given.
5879 I have moved the duplicate checking until after the routing is complete.
5880 Exim scans the addresses that are assigned to local and remote
5881 transports, and removes any duplicates. This means that more work will be
5882 done, as duplicates will always all be routed, but duplicates are
5883 presumably rare, so I don't expect this is of any significance.
5885 For deliveries to pipes, files, and autoreplies, the duplicate checking
5886 still happens during the routing process, since they are not going to be
5889 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5890 It corrects a timeout issue with spamd. This is Ian's comment: "The
5891 background is that sometimes spamd either never reads data from a
5892 connection it has accepted, or it never writes response data. The exiscan
5893 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5894 blindly assumes that writes won't block so it may never time out."
5896 PH/39 Allow G after quota size as well as K and M.
5898 PH/40 The value set for $authenticated_id in an authenticator may not contain
5899 binary zeroes or newlines because the value is written to log lines and
5900 to spool files. There was no check on this. Now the value is run through
5901 the string_printing() function so that such characters are converted to
5902 printable escape sequences.
5904 PH/41 $message_linecount is a new variable that contains the total number of
5905 lines in the message. Compare $body_linecount, which is the count for the
5908 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5909 bounce and delay warning messages, except in certain special cases, which
5912 (a) An SMTP error message from a remote host;
5913 (b) A message specified in a :fail: redirection;
5914 (c) A message specified in a "fail" command in a system filter;
5915 (d) A message specified in a FAIL return from the queryprogram router;
5916 (e) A message specified by the cannot_route_message router option.
5918 In these cases only, Exim does include the error details in bounce and
5919 warning messages. There are also a few cases where bland messages such
5920 as "unrouteable address" or "local delivery error" are given.
5922 PH/43 $value is now also set for the "else" part of a ${run expansion.
5924 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5925 being worked on, but at least Exim now implements the latest version to
5928 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5929 process to complete was treated as a delivery failure, a timeout while
5930 writing the message to the pipe was logged, but erroneously treated as a
5931 successful delivery. Such timeouts include transport filter timeouts. For
5932 consistency with the overall process timeout, these timeouts are now
5933 treated as errors, giving rise to delivery failures by default. However,
5934 there is now a new Boolean option for the pipe transport called
5935 timeout_defer, which, if set TRUE, converts the failures into defers for
5936 both kinds of timeout. A transport filter timeout is now identified in
5939 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5940 systems where "make" and "gmake" are different, calling "gmake" at top
5941 level broke things. I've arranged for the value of $(MAKE) to be passed
5942 from the Makefile to this script so that it can call the same version of
5946 A note about Exim versions 4.44 and 4.50
5947 ----------------------------------------
5949 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5950 changes of various kinds. As a consequence, a big documentation update was
5951 needed. This delayed the release for rather longer than seemed good, especially
5952 in the light of a couple of (minor) security issues. Therefore, the changes
5953 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5954 release. So 4.44 and 4.50 are in effect two different branches that both start
5957 I have left the 4.50 change log unchanged; it contains all the changes since
5958 4.43. The change log for 4.44 is below; many of its items are identical to
5959 those for 4.50. This seems to be the most sensible way to preserve the
5960 historical information.
5966 1. Minor wording change to the doc/README.SIEVE file.
5968 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5969 computation of the current number of files was incorrect.
5971 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5972 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5975 4. Give more explanation in the error message when the command for a transport
5976 filter fails to execute.
5978 5. There are several places where Exim runs a non-Exim command in a
5979 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5980 was being done only for the command run by the queryprogram router. It is
5981 now done for all such subprocesses. The other cases are: ${run, transport
5982 filters, and the commands run by the lmtp and pipe transports.
5984 6. Added CONFIGURE_GROUP build-time option.
5986 7. Some older OS have a limit of 256 on the maximum number of file
5987 descriptors. Exim was using setrlimit() to set 1000 as a large value
5988 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5989 systems. I've change it so that if it can't get 1000, it tries for 256.
5991 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5992 was an oversight, and furthermore, ever since the addition of extra
5993 controls (e.g. 4.43/32), the checks on when to allow different forms of
5994 "control" were broken. There should now be diagnostics for all cases when a
5995 control that does not make sense is encountered.
5997 9. Added the /retain_sender option to "control=submission".
5999 10. $recipients is now available in the predata ACL (oversight).
6001 11. Tidy the search cache before the fork to do a delivery from a message
6002 received from the command line. Otherwise the child will trigger a lookup
6003 failure and thereby defer the delivery if it tries to use (for example) a
6004 cached ldap connection that the parent has called unbind on.
6006 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6007 of $address_data from the recipient verification was clobbered by the
6008 sender verification.
6010 13. The value of address_data from a sender verification is now available in
6011 $sender_address_data in subsequent conditions in the ACL statement.
6013 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6015 15. Added a new option "connect=<time>" to callout options, to set a different
6018 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6019 was its contents. (It was OK if the option was not defined at all.)
6021 17. A "Completed" log line is now written for messages that are removed from
6022 the spool by the -Mrm option.
6024 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6025 information about exactly what failed.
6027 19. Added -dd to debug only the daemon process.
6029 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6030 handles timeouts, both on the server side and network timeouts. Renamed the
6031 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6033 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6034 It is now set to "smtps".
6036 22. $host_address is now set to the target address during the checking of
6037 ignore_target_hosts.
6039 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6040 being passed; this would have caused $sender_host_name to have been used if
6041 matching the list had actually called for a host name (not very likely,
6042 since this list is usually IP addresses). A host name is now passed as
6045 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6046 code that specifies a non-restarting handler (typically sigaction() in
6047 modern systems) in an attempt to fix a rare and obscure crash bug.
6049 25. Narrowed the window for a race in the daemon that could cause it to ignore
6050 SIGCHLD signals. This is not a major problem, because they are used only to
6051 wake it up if nothing else does.
6053 26. A malformed maildirsize file could cause Exim to calculate negative values
6054 for the mailbox size or file count. Odd effects could occur as a result.
6055 The maildirsize information is now recalculated if the size or filecount
6058 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6059 support for a long time. Removed HAVE_SYS_VFS_H.
6061 28. Installed the latest version of exipick from John Jetmore.
6063 29. In an address list, if the pattern was not a regular expression, an empty
6064 subject address (from a bounce message) matched only if the pattern was an
6065 empty string. Non-empty patterns were not even tested. This was the wrong
6066 because it is perfectly reasonable to use an empty address as part of a
6067 database query. An empty address is now tested by patterns that are
6068 lookups. However, all the other forms of pattern expect the subject to
6069 contain a local part and a domain, and therefore, for them, an empty
6070 address still always fails if the pattern is not itself empty.
6072 30. Exim went into a mad DNS loop when attempting to do a callout where the
6073 host was specified on an smtp transport, and looking it up yielded more
6074 than one IP address.
6076 31. Re-factored the code for checking spool and log partition space into a
6077 function that finds that data and another that does the check. The former
6078 is then used to implement four new variables: $spool_space, $log_space,
6079 $spool_inodes, and $log_inodes.
6081 32. The RFC2047 encoding function was originally intended for short strings
6082 such as real names; it was not keeping to the 75-character limit for
6083 encoded words that the RFC imposes. It now respects the limit, and
6084 generates multiple encoded words if necessary. To be on the safe side, I
6085 have increased the buffer size for the ${rfc2047: expansion operator from
6088 33. It is now permitted to omit both strings after an "if" condition; if the
6089 condition is true, the result is "true". As before, when the second string
6090 is omitted, a false condition yields an empty string. This makes it less
6091 cumbersome to write custom ACL and router conditions.
6093 34. Failure to deliver a bounce message always caused it to be frozen, even if
6094 there was an errors_to setting on the router. The errors_to setting is now
6097 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6098 canonical form (fully expanded) before being placed in
6099 $sender_host_address.
6101 36. The table in the code that translates DNS record types into text (T_A to
6102 "A" for instance) was missing entries for NS and CNAME. It is just possible
6103 that this could have caused confusion if both these types were looked up
6104 for the same domain, because the text type is used as part of Exim's
6105 per-process caching. But the chance of anyone hitting this buglet seems
6108 37. The dnsdb lookup has been extended in a number of ways.
6110 (1) There is a new type, "zns", which walks up the domain tree until it
6111 finds some nameserver records. It should be used with care.
6113 (2) There is a new type, "mxh", which is like "mx" except that it returns
6114 just the host names, not the priorities.
6116 (3) It is now possible to give a list of domains (or IP addresses) to be
6117 looked up. The behaviour when one of the lookups defers can be
6118 controlled by a keyword.
6120 (4) It is now possible to specify the separator character for use when
6121 multiple records are returned.
6123 38. The dnslists ACL condition has been extended: it is now possible to supply
6124 a list of IP addresses and/or domains to be looked up in a particular DNS
6127 39. Added log_selector=+queue_time_overall.
6129 40. When running the queue in the test harness, wait just a tad after forking a
6130 delivery process, to get repeatability of debugging output.
6132 41. Include certificate and key file names in error message when GnuTLS fails
6133 to set them up, because the GnuTLS error message doesn't include the name
6134 of the failing file when there is a problem reading it.
6136 42. Allow both -bf and -bF in the same test run.
6138 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6140 44. The "Exiscan patch" is now merged into the mainline Exim source.
6142 45. Sometimes the final signoff response after QUIT could fail to get
6143 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6144 < 0 before doing a fflush(). This bug looks as though it goes back to the
6145 introduction of TLS in release 3.20, but "sometimes" must have been rare
6146 because the tests only now provoked it.
6148 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6149 (this can affect the format of dates).
6151 47. exim_tidydb, when checking for the continued existence of a message for
6152 which it has found a message-specific retry record, was not finding
6153 messages that were in split spool directories. Consequently, it was
6154 deleting retry records that should have stayed in existence.
6156 48. Steve fixed some bugs in eximstats.
6158 49. The SPA authentication driver was not abandoning authentication and moving
6159 on to the next authenticator when an expansion was forced to fail,
6160 contradicting the general specification for all authenticators. Instead it
6161 was generating a temporary error. It now behaves as specified.
6163 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6164 (the order specifies the preference for clients). The order is now AES256,
6165 AES128, 3DES, ARCFOUR128.
6167 51. Small patch to Sieve code - explicitly set From: when generating an
6170 52. Exim crashed if a remote delivery caused a very long error message to be
6171 recorded - for instance if somebody sent an entire SpamAssassin report back
6172 as a large number of 550 error lines. This bug was coincidentally fixed by
6173 increasing the size of one of Exim's internal buffers (big_buffer) that
6174 happened as part of the Exiscan merge. However, to be on the safe side, I
6175 have made the code more robust (and fixed the comments that describe what
6178 53. Now that there can be additional text after "Completed" in log lines (if
6179 the queue_time_overall log selector is set), a one-byte patch to exigrep
6180 was needed to allow it to recognize "Completed" as not the last thing in
6183 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6184 patch that reportedly fixes this has been added. I am not expert enough to
6185 create a test for it. This is what the patch creator wrote:
6187 "I found a little strange behaviour of ldap code when working with
6188 Windows 2003 AD Domain, where users was placed in more than one
6189 Organization Units. When I tried to give exim partial DN, the exit code
6190 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6191 But simultaneously result of request was absolutely normal ldap result,
6192 so I produce this patch..."
6194 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6195 REFERENCE, so I have modified the code to exclude the patch when that macro
6198 55. Some experimental protocols are using DNS PTR records for new purposes. The
6199 keys for these records are domain names, not reversed IP addresses. The
6200 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6201 leaves it alone. Component reversal etc. now happens only for IP addresses.
6204 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6206 57. Double the size of the debug message buffer (to 2048) so that more of very
6207 long debug lines gets shown.
6209 58. The exicyclog utility now does better if the number of log files to keep
6210 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6212 59. Two changes related to the smtp_active_hostname option:
6214 (1) $smtp_active_hostname is now available as a variable.
6215 (2) The default for smtp_banner uses $smtp_active_hostname instead
6216 of $primary_hostname.
6218 60. The host_aton() function is supposed to be passed a string that is known
6219 to be a valid IP address. However, in the case of IPv6 addresses, it was
6220 not checking this. This is a hostage to fortune. Exim now panics and dies
6221 if the condition is not met. A case was found where this could be provoked
6222 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6223 components; fortuitously, this particular loophole had already been fixed
6224 by change 4.50/55 above.
6226 If there are any other similar loopholes, the new check in host_aton()
6227 itself should stop them being exploited. The report I received stated that
6228 data on the command line could provoke the exploit when Exim was running as
6229 exim, but did not say which command line option was involved. All I could
6230 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6231 running as the user.
6234 61. There was a buffer overflow vulnerability in the SPA authentication code
6235 (which came originally from the Samba project). I have added a test to the
6236 spa_base64_to_bits() function which I hope fixes it.
6239 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6240 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6242 63. The daemon start-up calls getloadavg() while still root for those OS that
6243 need the first call to be done as root, but it missed one case: when
6244 deliver_queue_load_max is set with deliver_drop_privilege. This is
6245 necessary for the benefit of the queue runner, because there is no re-exec
6246 when deliver_drop_privilege is set.
6248 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6249 This has been fixed.
6251 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6252 was in use, was not putting the data itself into the right store pool;
6253 consequently, it could be overwritten for a subsequent message in the same
6254 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6257 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6259 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6260 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6261 the function were treating the return as a boolean value, which happened to
6262 work because 0=false and not-0=true, but is not correct code.
6264 68. The host_aton() function was not handling scoped IPv6 addresses (those
6265 with, for example, "%eth0" on the end) correctly.
6267 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6268 negated items (that is, ~something) in unsigned ints. Some compilers
6269 apparently mutter when there is no cast.
6271 70. If an address verification called from an ACL failed, and did not produce a
6272 user-specific message (i.e. there was only a "system" message), nothing was
6273 put in $acl_verify_message. In this situation, it now puts the system
6276 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6277 session; change 4.31/43 added the unwanted input to the log line - except
6278 that it did not do this in the start of session case. It now does.
6280 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6281 This is wrong and can cause the other end to generate a synchronization
6282 error if it is another Exim or anything else that does the synchronization
6283 check. A QUIT command is no longer sent after a timeout.
6285 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6286 during host lookups.
6288 74. The defer_ok option of callout verification was not working if it was used
6289 when verifying addresses in header lines, that is, for this case:
6291 verify = header_sender/callout=defer_ok
6293 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6294 those file descriptors could be used for SMTP connections. If anything
6295 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6296 could be sent to the SMTP client, causing chaos. The daemon now opens
6297 stdin, stdout, and stderr to /dev/null when it puts itself into the
6300 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6301 log by default. The user can override this with suitable Perl magic.
6303 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6304 the log message when discard triggers, was not working for the DATA ACL or
6305 for the non-SMTP ACL.
6307 78. Error message wording change in sieve.c.
6309 79. If smtp_accept_max_per_host was set, the number of connections could be
6310 restricted to fewer than expected, because the daemon was trying to set up
6311 a new connection before checking whether the processes handling previous
6312 connections had finished. The check for completed processes is now done
6313 earlier. On busy systems, this bug wouldn't be noticed because something
6314 else would have woken the daemon, and it would have reaped the completed
6317 80. If a message was submitted locally by a user whose login name contained one
6318 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6319 It caused a spool format error. I have fixed the spool reading code. A
6320 related problem was that the "from" clause in the Received: line became
6321 illegal because of the space(s). It is now covered by ${quote_local_part.
6323 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6326 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6328 83. Patch from Sieve maintainer to fix unterminated string problem in
6329 "vacation" handling.
6331 84. Some minor changes to the Linux configuration files to help with other
6332 OS variants using glibc.
6334 85. One more patch for Sieve to update vacation handling to latest spec.
6337 ----------------------------------------------------
6338 See the note above about the 4.44 and 4.50 releases.
6339 ----------------------------------------------------
6345 1. Change 4.43/35 introduced a bug that caused file counts to be
6346 incorrectly computed when quota_filecount was set in an appendfile
6349 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6350 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6353 3. Give more explanation in the error message when the command for a transport
6354 filter fails to execute.
6356 4. There are several places where Exim runs a non-Exim command in a
6357 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6358 was being done only for the command run by the queryprogram router. It is
6359 now done for all such subprocesses. The other cases are: ${run, transport
6360 filters, and the commands run by the lmtp and pipe transports.
6362 5. Some older OS have a limit of 256 on the maximum number of file
6363 descriptors. Exim was using setrlimit() to set 1000 as a large value
6364 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6365 systems. I've change it so that if it can't get 1000, it tries for 256.
6367 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6368 was an oversight, and furthermore, ever since the addition of extra
6369 controls (e.g. 4.43/32), the checks on when to allow different forms of
6370 "control" were broken. There should now be diagnostics for all cases when a
6371 control that does not make sense is encountered.
6373 7. $recipients is now available in the predata ACL (oversight).
6375 8. Tidy the search cache before the fork to do a delivery from a message
6376 received from the command line. Otherwise the child will trigger a lookup
6377 failure and thereby defer the delivery if it tries to use (for example) a
6378 cached ldap connection that the parent has called unbind on.
6380 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6381 of $address_data from the recipient verification was clobbered by the
6382 sender verification.
6384 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6385 was its contents. (It was OK if the option was not defined at all.)
6387 11. A "Completed" log line is now written for messages that are removed from
6388 the spool by the -Mrm option.
6390 12. $host_address is now set to the target address during the checking of
6391 ignore_target_hosts.
6393 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6394 being passed; this would have caused $sender_host_name to have been used if
6395 matching the list had actually called for a host name (not very likely,
6396 since this list is usually IP addresses). A host name is now passed as
6399 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6400 code that specifies a non-restarting handler (typically sigaction() in
6401 modern systems) in an attempt to fix a rare and obscure crash bug.
6403 15. Narrowed the window for a race in the daemon that could cause it to ignore
6404 SIGCHLD signals. This is not a major problem, because they are used only to
6405 wake it up if nothing else does.
6407 16. A malformed maildirsize file could cause Exim to calculate negative values
6408 for the mailbox size or file count. Odd effects could occur as a result.
6409 The maildirsize information is now recalculated if the size or filecount
6412 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6413 support for a long time. Removed HAVE_SYS_VFS_H.
6415 18. Updated exipick to current release from John Jetmore.
6417 19. Allow an empty sender to be matched against a lookup in an address list.
6418 Previously the only cases considered were a regular expression, or an
6421 20. Exim went into a mad DNS lookup loop when doing a callout where the
6422 host was specified on the transport, if the DNS lookup yielded more than
6425 21. The RFC2047 encoding function was originally intended for short strings
6426 such as real names; it was not keeping to the 75-character limit for
6427 encoded words that the RFC imposes. It now respects the limit, and
6428 generates multiple encoded words if necessary. To be on the safe side, I
6429 have increased the buffer size for the ${rfc2047: expansion operator from
6432 22. Failure to deliver a bounce message always caused it to be frozen, even if
6433 there was an errors_to setting on the router. The errors_to setting is now
6436 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6437 canonical form (fully expanded) before being placed in
6438 $sender_host_address.
6440 24. Updated eximstats to version 1.33
6442 25. Include certificate and key file names in error message when GnuTLS fails
6443 to set them up, because the GnuTLS error message doesn't include the name
6444 of the failing file when there is a problem reading it.
6446 26. Expand error message when OpenSSL has problems setting up cert/key files.
6449 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6450 (this can affect the format of dates).
6452 28. exim_tidydb, when checking for the continued existence of a message for
6453 which it has found a message-specific retry record, was not finding
6454 messages that were in split spool directories. Consequently, it was
6455 deleting retry records that should have stayed in existence.
6457 29. eximstats updated to version 1.35
6458 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6459 1.35 - bugfix such that pie charts by volume are generated correctly
6461 30. The SPA authentication driver was not abandoning authentication and moving
6462 on to the next authenticator when an expansion was forced to fail,
6463 contradicting the general specification for all authenticators. Instead it
6464 was generating a temporary error. It now behaves as specified.
6466 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6467 (the order specifies the preference for clients). The order is now AES256,
6468 AES128, 3DES, ARCFOUR128.
6470 31. Small patch to Sieve code - explicitly set From: when generating an
6473 32. Exim crashed if a remote delivery caused a very long error message to be
6474 recorded - for instance if somebody sent an entire SpamAssassin report back
6475 as a large number of 550 error lines. This bug was coincidentally fixed by
6476 increasing the size of one of Exim's internal buffers (big_buffer) that
6477 happened as part of the Exiscan merge. However, to be on the safe side, I
6478 have made the code more robust (and fixed the comments that describe what
6481 33. Some experimental protocols are using DNS PTR records for new purposes. The
6482 keys for these records are domain names, not reversed IP addresses. The
6483 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6484 leaves it alone. Component reversal etc. now happens only for IP addresses.
6487 34. The host_aton() function is supposed to be passed a string that is known
6488 to be a valid IP address. However, in the case of IPv6 addresses, it was
6489 not checking this. This is a hostage to fortune. Exim now panics and dies
6490 if the condition is not met. A case was found where this could be provoked
6491 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6492 components; fortuitously, this particular loophole had already been fixed
6493 by change 4.50/55 or 4.44/33 above.
6495 If there are any other similar loopholes, the new check in host_aton()
6496 itself should stop them being exploited. The report I received stated that
6497 data on the command line could provoke the exploit when Exim was running as
6498 exim, but did not say which command line option was involved. All I could
6499 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6500 running as the user.
6503 35. There was a buffer overflow vulnerability in the SPA authentication code
6504 (which came originally from the Samba project). I have added a test to the
6505 spa_base64_to_bits() function which I hope fixes it.
6508 36. The daemon start-up calls getloadavg() while still root for those OS that
6509 need the first call to be done as root, but it missed one case: when
6510 deliver_queue_load_max is set with deliver_drop_privilege. This is
6511 necessary for the benefit of the queue runner, because there is no re-exec
6512 when deliver_drop_privilege is set.
6514 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6515 was in use, was not putting the data itself into the right store pool;
6516 consequently, it could be overwritten for a subsequent message in the same
6517 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6520 38. Sometimes the final signoff response after QUIT could fail to get
6521 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6522 < 0 before doing a fflush(). This bug looks as though it goes back to the
6523 introduction of TLS in release 3.20, but "sometimes" must have been rare
6524 because the tests only now provoked it.
6530 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6531 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6532 Now it returns an integer. A number of calls were still expecting a T/F
6533 return. Fortuitously, in all cases, the tests worked in OK situations,
6534 which is the norm. However, things would have gone wrong on any write
6535 failures on the smtp file descriptor. This function is used when sending
6536 messages over SMTP and also when doing verify callouts.
6538 2. When Exim is called to do synchronous delivery of a locally submitted
6539 message (the -odf or -odi options), it no longer closes stderr before doing
6542 3. Implemented the mua_wrapper option.
6544 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6546 5. Implemented the functions header_remove(), header_testname(),
6547 header_add_at_position(), and receive_remove_recipient(), and exported them
6550 6. If an ACL "warn" statement specified the addition of headers, Exim already
6551 inserted X-ACL-Warn: at the start if there was no header name. However, it
6552 was not making this test for the second and subsequent header lines if
6553 there were newlines in the string. This meant that an invalid header could
6554 be inserted if Exim was badly configured.
6556 7. Allow an ACL "warn" statement to add header lines at the start or after all
6557 the Received: headers, as well as at the end.
6559 8. Added the rcpt_4xx retry error code.
6561 9. Added postmaster_mailfrom=xxx to callout verification option.
6563 10. Added mailfrom=xxxx to the callout verification option, for verify=
6566 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6567 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6569 12. Inserted some casts to stop certain compilers warning when using pointer
6570 differences as field lengths or precisions in printf-type calls (mostly
6571 affecting debugging statements).
6573 13. Added optional readline() support for -be (dynamically loaded).
6575 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6576 same clock tick as a message's arrival, so that its received time was the
6577 same as the "first fail" time on the retry record, and that message
6578 remained on the queue past the ultimate address timeout, every queue runner
6579 would try a delivery (because it was past the ultimate address timeout) but
6580 after another failure, the ultimate address timeout, which should have then
6581 bounced the address, did not kick in. This was a "< instead of <=" error;
6582 in most cases the first failure would have been in the next clock tick
6583 after the received time, and all would be well.
6585 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6586 being recognized when the domain list was tested by the match_domain
6587 condition in an expansion string.
6589 16. Added the ${str2b64: operator.
6591 17. Exim was always calling setrlimit() to set a large limit for the number of
6592 processes, without checking whether the existing limit was already
6593 adequate. (It did check for the limit on file descriptors.) Furthermore,
6594 errors from getrlimit() and setrlimit() were being ignored. Now they are
6595 logged to the main and panic logs, but Exim does carry on, to try to do its
6596 job under whatever limits there are.
6598 18. Imported PCRE 5.0.
6600 19. Trivial typo in log message " temporarily refused connection" (the leading
6603 20. If the log selector return_path_on_delivery was set and an address was
6604 redirected to /dev/null, the delivery process crashed because it assumed
6605 that a return path would always be set for a "successful" delivery. In this
6606 case, the whole delivery is bypassed as an optimization, and therefore no
6609 21. Internal re-arrangement: the function for sending a challenge and reading
6610 a response while authentication was assuming a zero-terminated challenge
6611 string. It's now changed to take a pointer and a length, to allow for
6612 binary data in such strings.
6614 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6616 23. Exim was not respecting finduser_retries when seeking the login of the
6617 uid under which it was called; it was always trying 10 times. (The default
6618 setting of finduser_retries is zero.) Also, it was sleeping after the final
6619 failure, which is pointless.
6621 24. Implemented tls_on_connect_ports.
6623 25. Implemented acl_smtp_predata.
6625 26. If the domain in control=submission is set empty, Exim assumes that the
6626 authenticated id is a complete email address when it generates From: or
6627 Sender: header lines.
6629 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6630 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6631 chown and chgrp in /bin and hostname in /usr/bin.
6633 28. Exim was keeping the "process log" file open after each use, just as it
6634 does for the main log. This opens the possibility of it remaining open for
6635 long periods when the USR1 signal hits a daemon. Occasional processlog
6636 errors were reported, that could have been caused by this. Anyway, it seems
6637 much more sensible not to leave this file open at all, so that is what now
6640 29. The long-running daemon process does not normally write to the log once it
6641 has entered its main loop, and it closes the log before doing so. This is
6642 so that log files can straightforwardly be renamed and moved. However,
6643 there are a couple of unusual error situations where the daemon does write
6644 log entries, and I had neglected to close the log afterwards.
6646 30. The text of an SMTP error response that was received during a remote
6647 delivery was being truncated at 512 bytes. This is too short for some of
6648 the long messages that one sometimes sees. I've increased the limit to
6651 31. It is now possible to make retry rules that apply only when a message has a
6652 specific sender, in particular, an empty sender.
6654 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6655 it possible to be selective about when SMTP synchronization is enforced.
6657 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6659 32. Implemented hosts_connection_nolog.
6661 33. Added an ACL for QUIT.
6663 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6666 35. Added mailbox_size and mailbox_filecount to appendfile.
6668 36. Added control = no_multiline_responses to ACLs.
6670 37. There was a bug in the logic of the code that waits for the clock to tick
6671 in the case where the clock went backwards by a substantial amount such
6672 that the microsecond fraction of "now" was more than the microsecond
6673 fraction of "then" (but the whole seconds number was less).
6675 38. Added support for the libradius Radius client library this is found on
6676 FreeBSD (previously only the radiusclient library was supported).
6682 1. When certain lookups returned multiple values in the form name=value, the
6683 quoting of the values was not always being done properly. Specifically:
6684 (a) If the value started with a double quote, but contained no whitespace,
6686 (b) If the value contained whitespace other than a space character (i.e.
6687 tabs or newlines or carriage returns) it was not quoted.
6688 This fix has been applied to the mysql and pgsql lookups by writing a
6689 separate quoting function and calling it from the lookup code. The fix
6690 should probably also be applied to nisplus, ibase and oracle lookups, but
6691 since I cannot test any of those, I have not disturbed their existing code.
6693 2. A hit in the callout cache for a specific address caused a log line with no
6694 reason for rejecting RCPT. Now it says "Previous (cached) callout
6695 verification failure".
6697 3. There was an off-by-one bug in the queryprogram router. An over-long
6698 return line was truncated at 256 instead of 255 characters, thereby
6699 overflowing its buffer with the terminating zero. As well as fixing this, I
6700 have increased the buffer size to 1024 (and made a note to document this).
6702 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6703 when Exim is waiting for an SMTP response from a remote server, Exim
6704 restarts its select() call on the socket, thereby resetting its timeout.
6705 This is not a problem when such interrupts are rare. Somebody set up a cron
6706 job to run exiwhat every 2 minutes, which is less than the normal select()
6707 timeout (5 or 10 minutes). This meant that the select() timeout never
6708 kicked in because it was always reset. I have fixed this by comparing the
6709 time when an interrupt arrives with the time at the start of the first call
6710 to select(). If more time than the timeout has elapsed, the interrupt is
6711 treated as a timeout.
6713 5. Some internal re-factoring in preparation for the addition of Sieve
6714 extensions (by MH). In particular, the "personal" test is moved to a
6715 separate function, and given an option for scanning Cc: and Bcc: (which is
6716 not set for Exim filters).
6718 6. When Exim created an email address using the login of the caller as the
6719 local part (e.g. when creating a From: or Sender: header line), it was not
6720 quoting the local part when it contained special characters such as @.
6722 7. Installed new OpenBSD configuration files.
6724 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6725 try to make them clearer.
6727 9. Callout options, other than the timeout value, were being ignored when
6728 verifying sender addresses in header lines. For example, when using
6730 verify = header_sender/callout=no_cache
6732 the cache was (incorrectly) being used.
6734 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6735 only the Cygwin environment.
6737 11. When return_path_on_delivery was set as a log selector, if different remote
6738 addresses in the same message used different return paths and parallel
6739 remote delivery occurred, the wrong values would sometimes be logged.
6740 (Whenever a remote delivery process finished, the return path value from
6741 the most recently started remote delivery process was logged.)
6743 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6744 lines when AUTH and/or TLS are in use. This is the "received protocol"
6745 field. Exim used to use "asmtp" for authenticated SMTP, without any
6746 indication (in the protocol name) for TLS use. Now it follows the RFC and
6747 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6748 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6749 names appear in log lines as well as in Received: header lines.
6751 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6752 extensions, and comparison tests, and to fix some bugs.
6754 14. Changes to the "personal" filter test:
6756 (1) The test was buggy in that it was just doing the equivalent of
6757 "contains" tests on header lines. For example, if a user's address was
6758 anne@some.where, the "personal" test would incorrectly be true for
6760 To: susanne@some.where
6762 This test is now done by extracting each address from the header in turn,
6763 and checking the entire address. Other tests that are part of "personal"
6764 are now done using regular expressions (for example, to check local parts
6765 of addresses in From: header lines).
6767 (2) The list of non-personal local parts in From: addresses has been
6768 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6769 taken from the Sieve specification recommendations.
6771 (3) If the message contains any header line starting with "List-" it is
6772 treated as non-personal.
6774 (4) The test for "circular" in the Subject: header line has been removed
6775 because it now seems ill-conceived.
6777 15. Minor typos in src/EDITME comments corrected.
6779 16. Installed latest exipick from John Jetmore.
6781 17. If headers_add on a router specified a text string that was too long for
6782 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6783 of string_sprintf() is now avoided.
6785 18. $message_body_size was not set (it was always zero) when running the DATA
6786 ACL and the local_scan() function.
6788 19. For the "mail" command in an Exim filter, no default was being set for
6789 the once_repeat time, causing a random time value to be used if "once" was
6790 specified. (If the value happened to be <= 0, no repeat happened.) The
6791 default is now 0s, meaning "never repeat". The "vacation" command was OK
6792 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6793 (I found it when inspecting the code).
6795 20. There is now an overall timeout for performing a callout verification. It
6796 defaults to 4 times the callout timeout, which applies to individual SMTP
6797 commands during the callout. The overall timeout applies when there is more
6798 than one host that can be tried. The timeout is checked before trying the
6799 next host. This prevents very long delays if there are a large number of
6800 hosts and all are timing out (e.g. when the network connections are timing
6801 out). The value of the overall timeout can be changed by specifying an
6802 additional sub-option for "callout", called "maxwait". For example:
6804 verify = sender/callout=5s,maxwait=20s
6806 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6807 to the end before writing, but this should make it even safer).
6809 22. Exim was forgetting that it had advertised PIPELINING for the second and
6810 subsequent messages on an SMTP connection. It was also not resetting its
6811 memory on STARTTLS and an internal HELO.
6813 23. When Exim logs an SMTP synchronization error within a session, it now
6814 records whether PIPELINING has been advertised or not.
6816 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6817 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6818 rather than long int.
6820 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6822 26. Added the never_mail option to autoreply.
6828 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6829 crash if the getsockname() call failed; this can happen if a connection is
6830 closed very soon after it is established. The problem was simply in the
6831 order in which certain operations were done, causing Exim to try to write
6832 to the SMTP stream before it had set up the file descriptor. The bug has
6833 been fixed by making things happen in the correct order.
6839 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6840 before the connection was closed, thus losing the rejection response.
6842 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6843 some early Solaris releases, but causes trouble in current releases where
6844 socklen_t is defined.
6846 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6849 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6852 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6853 that releasing the top of it at the end releases what was used for sub-
6854 expansions (unless the block got too big). However, discard this block if
6855 the first thing is a variable or header, so that we can use its block when
6856 it is dynamic (useful for very large $message_headers, for example).
6858 6. Lookups now cache *every* query, not just the most recent. A new, separate
6859 store pool is used for this. It can be recovered when all lookup caches are
6860 flushed. Lookups now release memory at the end of their result strings.
6861 This has involved some general refactoring of the lookup sources.
6863 7. Some code has been added to the store_xxx() functions to reduce the amount
6864 of flapping under certain conditions.
6866 8. log_incoming_interface used to affect only the <= reception log lines. Now
6867 it causes the local interface and port to be added to several more SMTP log
6868 lines, for example "SMTP connection from", and rejection lines.
6870 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6872 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6874 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6875 could be overwritten at the end of the current message (or the start of a
6876 new message if it was set in a HELO ACL). The value is now preserved for
6877 the duration of the SMTP connection.
6879 12. If a transport had a headers_rewrite setting, and a matching header line
6880 contained an unqualified address, that address was qualified, even if it
6881 did not match any rewriting rules. The underlying bug was that the values
6882 of the flags that permit the existence of unqualified sender and recipient
6883 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6884 non-local messages, and by -bnq for local messages) were not being
6885 preserved with the message after it was received.
6887 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6888 "next input=" as part of the text comprising the host identity instead of
6889 the correct text. The code was using the same buffer for two different
6890 strings. However, depending on which order the printing function evaluated
6891 its arguments, the bug did not always show up. Under Linux, for example, my
6892 test suite worked just fine.
6894 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6895 doesn't work with some older versions of Perl. It has been changed to "my",
6896 which in any case is probably the better facility to use.
6898 15. A really picky compiler found some instances of statements for creating
6899 error messages that either had too many or two few arguments for the format
6902 16. The size of the buffer for calls to the DNS resolver has been increased
6903 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6904 for addresses that have a lot of PTR records. This alleviates a problem; it
6905 does not fully solve it.
6907 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6908 buffer now truncates the list and logs the incident, which is the same
6909 action as happens when Exim is looking up a host name and its aliases.
6910 Previously in this situation something unpredictable would happen;
6911 sometimes it was "internal error: store_reset failed".
6913 18. If a server dropped the connection unexpectedly when an Exim client was
6914 using GnuTLS and trying to read a response, the client delivery process
6915 crashed while trying to generate an error log message.
6917 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6918 string, for example:
6920 warn message = H1: something\nH2: something
6922 the text was added as a single header line from Exim's point of view
6923 though it ended up OK in the delivered message. However, searching for the
6924 second and subsequent header lines using $h_h2: did not work. This has been
6925 fixed. Similarly, if a system filter added multiple headers in this way,
6926 the routers could not see them.
6928 20. Expanded the error message when iplsearch is called with an invalid key to
6929 suggest using net-iplsearch in a host list.
6931 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6932 ACLs are no longer actually imposed (and a message to that effect is
6935 22. If a "gecos" field in a passwd entry contained escaped characters, in
6936 particular, if it contained a \" sequence, Exim got it wrong when building
6937 a From: or a Sender: header from that name. A second bug also caused
6938 incorrect handling when an unquoted " was present following a character
6939 that needed quoting.
6941 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6942 was not being matched caselessly.
6944 24. Arranged for all hyphens in the exim.8 source to be escaped with
6947 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6948 properly. Recipient callout cache records were still being keyed to include
6949 the sender, even when use_sender was set false. This led to far more
6950 callouts that were necessary. The sender is no longer included in the key
6951 when use_sender is false.
6953 26. Added "control = submission" modifier to ACLs.
6955 27. Added the ${base62d: operator to decode base 62 numbers.
6957 28. dnsdb lookups can now access SRV records.
6959 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6960 the configuration file.
6962 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6963 (-v) mode. This makes the output for a verbose queue run more intelligible.
6965 31. Added a use_postmaster feature to recipient callouts.
6967 32. Added the $body_zerocount variable, containing the number of binary zero
6968 bytes in the message body.
6970 33. The time of last modification of the "new" subdirectory is now used as the
6971 "mailbox time last read" when there is a quota error for a maildir
6974 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6976 35. Added +ignore_unknown as a special item in host lists.
6978 36. Code for decoding IPv6 addresses in host lists is now included, even if
6979 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6980 address was recognized as an IP address, but was then not correctly decoded
6981 into binary, causing unexpected and incorrect effects when compared with
6988 1. Very minor rewording of debugging text in manualroute to say "list of
6989 hosts" instead of "hostlist".
6991 2. If verify=header_syntax was set, and a header line with an unqualified
6992 address (no domain) and a large number of spaces between the end of the
6993 name and the colon was received, the reception process suffered a buffer
6994 overflow, and (when I tested it) crashed. This was caused by some obsolete
6995 code that should have been removed. The fix is to remove it!
6997 3. When running in the test harness, delay a bit after writing a bounce
6998 message to get a bit more predictability in the log output.
7000 4. Added a call to search_tidyup() just before forking a reception process. In
7001 theory, someone could use a lookup in the expansion of smtp_accept_max_
7002 per_host which, without the tidyup, could leave open a database connection.
7004 5. Added the variables $recipient_data and $sender_data which get set from a
7005 lookup success in an ACL "recipients" or "senders" condition, or a router
7006 "senders" option, similar to $domain_data and $local_part_data.
7008 6. Moved the writing of debug_print from before to after the "senders" test
7011 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7012 problems for message scanning, either using a data ACL, or using
7013 local_scan() because the Received: header was not generated till after they
7014 were called (in order to set the time as the time of reception completion).
7015 I have revised the way this works. The header is now generated after the
7016 body is received, but before the ACL or local_scan() are called. After they
7017 are run, the timestamp in the header is updated.
7023 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7024 before starting a queue runner without re-exec. This happened only when
7025 deliver_drop_privilege was set or when the Exim user was set to root. The
7026 effect of the bug was that timeouts during subsequent deliveries caused
7027 crashes instead of being properly handled. The handler is now left at its
7028 default (and expected) setting.
7030 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7031 message, again when deliver_drop_privilege is set or Exim is run as root.
7032 The bug described in (1) was not present in this case, but the tidying up
7033 of the other signals was missing. I have made the two cases consistent.
7035 3. The ignore_target_hosts setting on a manualroute router was being ignored
7036 for hosts that were looked up using the /MX notation.
7038 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7041 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7042 operated on the sender address. After changing the $sender_address to <>
7043 for the sender address verify, Exim was re-instated it as the original
7044 (before rewriting) address, but remembering that it had rewritten it, so it
7045 wasn't rewriting it again. This bug also had the effect of breaking the
7046 sender address verification caching when the sender address was rewritten.
7048 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7049 This has been changed so that if the ip literal address matches
7050 ignore_target_hosts, the router declines.
7052 7. Added expansion conditions match_domain, match_address, and match_local_
7053 part (NOT match_host).
7055 8. The placeholder for the Received: header didn't have a length field set.
7057 9. Added code to Exim itself and to exim_lock to test for a specific race
7058 condition that could lead to file corruption when using MBX delivery. The
7059 issue is with the lockfile that is created in /tmp. If this file is removed
7060 after a process has opened it but before that process has acquired a lock,
7061 there is the potential for a second process to recreate the file and also
7062 acquire a lock. This could lead to two Exim processes writing to the file
7063 at the same time. The added code performs the same test as UW imapd; it
7064 checks after acquiring the lock that its file descriptor still refers to
7065 the same named file.
7067 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7068 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7071 11. Added the smtp_active_hostname option. If used, this will typically be made
7072 to depend on the incoming interface address. Because $interface_address is
7073 not set up until the daemon has forked a reception process, error responses
7074 that can happen earlier (such as "too many connections") no longer contain
7077 12. If an expansion in a condition on a "warn" statement fails because a lookup
7078 defers, the "warn" statement is abandoned, and the next ACL statement is
7079 processed. Previously this caused the whole ACL to be aborted.
7081 13. Added the iplsearch lookup type.
7083 14. Added ident_timeout as a log selector.
7085 15. Added tls_certificate_verified as a log selector.
7087 16. Added a global option tls_require_ciphers (compare the smtp transport
7088 option of the same name). This controls incoming TLS connections.
7090 17. I finally figured out how to make tls_require_ciphers do a similar thing
7091 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7092 before starting the TLS session.
7094 18. Tabs are now shown as \t in -bP output.
7096 19. If the log selector return_path_on_delivery was set, Exim crashed when
7097 bouncing a message because it had too many Received: header lines.
7099 20. If two routers both had headers_remove settings, and the first one included
7100 a superfluous trailing colon, the final name in the first list and the
7101 first name in the second list were incorrectly joined into one item (with a
7102 colon in the middle).
7108 1. Added -C and -D options to the exinext utility, mainly to make it easier
7109 to include in the automated testing, but these could be helpful when
7110 multiple configurations are in use.
7112 2. The exinext utility was not formatting the output nicely when there was
7113 an alternate port involved in the retry record key, nor when there was a
7114 message id as well (for retries that were specific to a specific message
7115 and a specific host). It was also confused by IPv6 addresses, because of
7116 the additional colons they contain. I have fixed the IPv4 problem, and
7117 patched it up to do a reasonable job for IPv6.
7119 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7120 delivery, the log line now contains "pipelined" if PIPELINING was used.
7122 4. An SMTP transport process used to panic and die if the bind() call to set
7123 an explicit outgoing interface failed. This has been changed; it is now
7124 treated in the same way as a connect() failure.
7126 5. A reference to $sender_host_name in the part of a conditional expansion
7127 that was being skipped was still causing a DNS lookup. This no longer
7130 6. The def: expansion condition was not recognizing references to header lines
7131 that used bh_ and bheader_.
7133 7. Added the _cache feature to named lists.
7135 8. The code for checking quota_filecount in the appendfile transport was
7136 allowing one more file than it should have been.
7138 9. For compatibility with Sendmail, the command line option
7146 and sets the incoming protocol and host name (for trusted callers). The
7147 host name and its colon can be omitted when only the protocol is to be set.
7148 Note the Exim already has two private options, -pd and -ps, that refer to
7149 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7150 "s", but I don't think that's a major issue.
7152 10. A number of refactoring changes to the code, none of which should affect
7155 (a) The number of logging options was getting close to filling up the
7156 32-bit word that was used as a bit map. I have split them into two classes:
7157 those that are passed in the argument to log_write(), and those that are
7158 only ever tested independently outside of that function. These are now in
7159 separate 32-bit words, so there is plenty of room for expansion again.
7160 There is no change in the user interface or the logging behaviour.
7162 (b) When building, for example, log lines, the code previously used a
7163 macro that called string_cat() twice, in order to add two strings. This is
7164 not really sufficiently general. Furthermore, there was one instance where
7165 it was actually wrong because one of the argument was used twice, and in
7166 one call a function was used. (As it happened, calling the function twice
7167 did not affect the overall behaviour.) The macro has been replaced by a
7168 function that can join an arbitrary number of extra strings onto a growing
7171 (c) The code for expansion conditions now uses a table and a binary chop
7172 instead of a serial search (which was left over from when there were very
7173 few conditions). Also, it now recognizes conditions like "pam" even when
7174 the relevant support is not compiled in: a suitably worded error message is
7175 given if an attempt is made to use such a condition.
7177 11. Added ${time_interval:xxxxx}.
7179 12. A bug was causing one of the ddress fields not to be passed back correctly
7180 from remote delivery subprocesses. The field in question was not being
7181 subsequently used, so this caused to problems in practice.
7183 13. Added new log selectors queue_time and deliver_time.
7185 14. Might have fixed a bug in maildirsizefile handling that threw up
7186 "unexpected character" debug warnings, and recalculated the data
7187 unnecessarily. In any case, I expanded the warning message to give more
7190 15. Added the message "Restricted characters in address" to the statements in
7191 the default ACL that block characters like @ and % in local parts.
7193 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7194 Three changes have been made:
7196 (a) There was a serious bug; a negative response to MAIL caused the whole
7197 recipient domain to be cached as invalid, thereby blocking all messages
7198 to all local parts at the same domain, from all senders. This bug has
7199 been fixed. The domain is no longer cached after a negative response to
7200 MAIL if the sender used is not empty.
7202 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7205 (c) A new callout option, "use_sender" has been added for people who want
7206 the modified behaviour.
7212 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7215 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7216 indeed breaks things for older releases.
7218 3. Added additional logging to the case where there is a problem reading data
7219 from a filter that is running in a subprocess using a pipe, in order to
7220 try to track down a specific problem.
7222 4. Testing facility fudge: when running in the test harness and attempting
7223 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7224 getting "No route to host". Convert this to a timeout.
7226 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7229 6. Some OS don't have socklen_t but use size_t instead. This affects the
7230 fifth argument of getsockopt() amongst other things. This is now
7231 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7232 can be set for individual OS. I have set it for SunOS5, OSF1, and
7233 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7234 some earlier ones do not.
7236 7. Change 4.30/15 was not doing the test caselessly.
7238 8. The standard form for an IPv6 address literal was being rejected by address
7239 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7240 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7241 this, as well as the form without the "IPv6" on the front (but only when
7242 address literals are enabled, of course).
7244 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7246 10. Exim crashed if a message with an empty sender address specified by -f
7247 encountered a router with an errors_to setting. This could be provoked only
7248 by a command such as
7252 where an empty string was supplied; "<>" did not hit this bug.
7254 11. Installed PCRE release 4.5.
7256 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7257 remained set. It is now erased.
7259 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7260 times from message ids (which are base 36 rather than the normal 62).
7262 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7263 were being counted as actual protocol errors, and logged if the log
7264 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7265 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7266 and DATA following a set of rejected RCPTs do not count as protocol errors.
7267 In other words, Exim assumes they were pipelined, though this may not
7268 actually be the case. Of course, in all cases the client gets an
7269 appropriate error code.
7271 15. If a lookup fails in an ACL condition, a message about the failure may
7272 be available; it is used if testing the ACL cannot continue, because most
7273 such messages specify what the cause of the deferral is. However, some
7274 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7275 that caused an old message to be retained and used if a later statement
7276 caused a defer, replacing the real cause of the deferral.
7278 16. If an IP address had so many PTR records that the DNS lookup buffer
7279 was not large enough to hold them, Exim could crash while trying to process
7280 the truncated data. It now detects and logs this case.
7282 17. Further to 4.21/58, another change has been made: if (and only if) the
7283 first line of a message (the first header line) ends with CRLF, a bare LF
7284 in a subsequent header line has a space inserted after it, so as not to
7285 terminate the header.
7287 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7288 unnecessarily, used atoi() instead of strtol(), and didn't check the
7289 termination when getting file sizes from file names by regex.
7291 19. Completely re-implemented the support for maildirsize files, in the light
7292 of a number of problems with the previous contributed implementation
7293 (4.30/29). In particular:
7295 . If the quota is zero, the maildirsize file is maintained, but no quota is
7298 . If the maildir directory does not exist, it is created before any attempt
7299 to write a maildirsize file.
7301 . The quota value in the file is just a cache; if the quota is changed in
7302 the transport, the new value overrides.
7304 . A regular expression is available for excluding directories from the
7307 20. The autoreply transport checks the characters in options that define the
7308 message's headers; it allows continued headers, but it was checking with
7309 isspace() after an embedded newline instead of explicitly looking for a
7312 21. If all the "regular" hosts to which an address was routed had passed their
7313 expiry times, and had not reached their retry times, the address was
7314 bounced, even if fallback hosts were defined. Now Exim should go on to try
7317 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7318 equivalent code in the SMTP transport. Some hosts send humungous responses
7319 to HELO/EHLO, more than 1024 it seems.
7321 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7322 gives compiler warnings in some environments. I've now done it "properly",
7325 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7326 (because of problems with the built-in one) was declared to return uschar *
7327 instead of char *, causing compiler failure.
7329 25. Fixed a file descriptor leak when processing alias/forward files.
7331 26. Fixed a minor format string issue in dbfn.c.
7333 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7335 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7336 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7339 29. When a sender address is verified, it is cached, to save repeating the test
7340 when there is more than one recipient in a message. However, when the
7341 verification involves a callout, it is possible for different callout
7342 options to be set for different recipients. It is too complicated to keep
7343 track of this in the cache, so now Exim always runs a verification when a
7344 callout is required, relying on the callout cache for the optimization.
7345 The overhead is duplication of the address routing, but this should not be
7348 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7349 to be verified with callout=postmaster, and the main callout worked but the
7350 postmaster check failed, the verification correctly failed. However, if a
7351 subsequent RCPT command asked for sender verification *without* the
7352 postmaster check, incorrect caching caused this verification also to fail,
7355 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7356 it was not caching the DNS options (qualify_single, search_parents) that
7357 were used when the lookup failed. A subsequent lookup with different
7358 options therefore always gave the same answer, though there were cases
7359 where it should not have. (Example: a "domains = !$mx_any" option on a
7360 dnslookup router: the "domains" option is always processed without any
7361 widening, but the router might have qualify_single set.) Now Exim uses the
7362 cached value only when the same options are set.
7364 32. Added John Jetmore's "exipick" utility to the distribution.
7366 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7367 than a timeout (e.g. a certificate is required, and is not provided), an
7368 Exim server now closes the connection immediately. Previously it waited for
7369 the client to close - but if the client is SSL, it seems that they each
7370 wait for each other, leading to a delay before one of them times out.
7372 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7373 maintained 0.8.x compatibility because I don't think many are using it, and
7374 it is clearly obsolete.
7376 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7379 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7380 client certificate was expired. A simple patch fixes this, though I don't
7381 understand the full logic of why the verify callback is called multiple
7384 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7385 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7386 which causes problems with some clients (such as the Certicom SSL Plus
7387 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7388 disables the coutermeasure allowing Eudora to connect."
7390 38. Exim was not checking that a write() to a log file succeeded. This could
7391 lead to Bad Things if a log got too big, in particular if it hit a file
7392 size limit. Exim now panics and dies if it cannot write to a log file, just
7393 as it does if it cannot open a log file.
7395 39. Modified OS/Makefile-Linux so that it now contains
7397 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7399 The two -D definitions ensure that Exim is compiled with large file
7400 support, which makes it possible to handle log files that are bigger than
7403 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7404 instance) a domain was checked against a named list that involved a lookup,
7405 causing $domain_data to be set, then another domain was checked against the
7406 same list, then the first domain was re-checked, the value of $domain_data
7407 after the final check could be wrong. In particular, if the second check
7408 failed, it could be set empty. This bug probably also applied to
7411 41. The strip_trailing_dot option was not being applied to the address given
7412 with the -f command-line option.
7414 42. The code for reading a message's header from the spool was incrementing
7415 $received_count, but never initializing it. This meant that the value was
7416 incorrect (doubled) while delivering a message in the same process in which
7417 it was received. In the most common configuration of Exim, this never
7418 happens - a fresh exec is done - but it can happen when
7419 deliver_drop_privilege is set.
7421 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7422 it now includes up to 150 characters of the unexpected data in the log
7425 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7426 and building data strings. The size of both of these buffers was 10 000
7427 bytes - far larger than anybody would *ever* want, thought I. Needless to
7428 say, somebody hit the limit. I have increased the maximum line length to
7429 20 000 and the maximum data length of concatenated lines to 100 000. I have
7430 also fixed two bugs, because there was no checking on these buffers. Tsk,
7431 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7432 buffer is too small.
7434 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7435 lsearch lookups. Now it does.
7437 46. When parsing a route_list item in a manualroute router, a fixed-length
7438 buffer was used for the list of hosts. I made this 1024 bytes long,
7439 thinking that nobody would ever have a list of hosts that long. Wrong.
7440 Somebody had a whole pile of complicated expansion conditions, and the
7441 string was silently truncated, leading to an expansion error. It turns out
7442 that it is easier to change to an unlimited length (owing to other changes
7443 that have happened since this code was originally written) than to build
7444 structure for giving a limitation error. The length of the item that
7445 expands into the list of hosts is now unlimited.
7447 47. The lsearch lookup could not handle data where the length of text line was
7448 more than 4095 characters. Such lines were truncated, leading to shortened
7449 data being returned. It should now handle lines of any length.
7451 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7452 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7455 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7456 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7457 no longer happens in comment lines. A list of replacements is now placed
7458 at the head of all of the source files, except those whose only change is
7459 to replace PERL_COMMAND in the very first #! line.
7461 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7462 messages on the queue, with a bottom-up merge sort, using code contributed
7463 by Michael Haardt. This should make operations like -bp somewhat faster on
7464 large queues. It won't affect queue runners, except when queue_run_in_order
7467 51. Installed eximstats 1.31 in the distribution.
7469 52. Added support for SRV lookups to the dnslookup router.
7471 53. If an ACL referred to $message_body or $message_body_end, the value was not
7472 reset for any messages that followed in the same SMTP session.
7474 54. The store-handling optimization for building very long strings was not
7475 differentiating between the different store pools. I don't think this
7476 actually made any difference in practice, but I've tidied it.
7478 55. While running the routers to verify a sender address, $sender_address
7479 was still set to the sender address. This is wrong, because when routing to
7480 send a bounce to the sender, it would be empty. Therefore, I have changed
7481 it so that, while verifying a sender address, $sender_address is set to <>.
7482 (There is no change to what happens when verifying a recipient address.)
7484 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7485 target A or AAAA records (if not already returned) without resetting the
7486 qualify_single or search_parents options of the DNS resolver. These are
7487 inappropriate in this case because the targets of MX and SRV records must
7488 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7489 target that, when qualified, matched something in the local domain. These
7490 two options are now turned off when doing these lookups.
7492 57. It seems that at least some releases of Reiserfs (which does not have the
7493 concept of a fixed number of inodes) returns zero and not -1 for the
7494 number of available inodes. This interacted badly with check_spool_inodes,
7495 which assumed that -1 was the "no such thing" setting. What I have done is
7496 to check that the total number of inodes is greater than zero before doing
7497 the test of how many are available.
7499 58. When a "warn" ACL statement has a log_message modifier, the message is
7500 remembered, and not repeated. This is to avoid a lot of repetition when a
7501 message has many recipients that cause the same warning to be written.
7502 However, Exim was preserving the list of already written lines for an
7503 entire SMTP session, which doesn't seem right. The memory is now reset if a
7504 new message is started.
7506 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7507 debugging output unless log_rewrite was also set.
7509 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7510 of (int)(handle) when we know that handle contains (void *)(-1).
7512 61. The Exim daemon panic-logs an error return when it closes the incoming
7513 connection. However "connection reset by peer" seems to be common, and
7514 isn't really an error worthy of noting specially, so that particular error
7517 62. When Exim is trying to find all the local interfaces, it used to panic and
7518 die if the ioctl to get the interface flags failed. However, it seems that
7519 on at least one OS (Solaris 9) it is possible to have an interface that is
7520 included in the list of interfaces, but for which you get a failure error
7521 for this call. This happens when the interface is not "plumbed" into a
7522 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7523 failure of the "get flags" call assumes that the interface is down.
7525 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7526 makes life easier for people who are doing arithmetic on fields extracted
7527 from dates, where you often get leading zeros that should not be
7528 interpreted as octal.
7530 64. Added qualify_domain to the redirect router, to override the global
7533 65. If a pathologically long header line contained very many addresses (the
7534 report of this problem mentioned 10 000) and each of them was rewritten,
7535 Exim could use up a very large amount of memory. (It kept on making new
7536 copies of the header line as it rewrote, and never released the old ones.)
7537 At the expense of a bit more processing, the header rewriting function has
7538 been changed so that it no longer eats memory in this way.
7540 66. The generation of the Received: header has been moved from the time that a
7541 message starts to be received, to the time that it finishes. The timestamp
7542 in the Received: header should now be very close to that of the <= log
7543 line. There are two side-effects of this change:
7545 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7546 logged header lines no longer include the local Received: line, because
7547 it has not yet been created. The same applies to a copy of the message
7548 that is returned to a non-SMTP sender when a message is rejected.
7550 (b) When a filter file is tested using -bf, no additional Received: header
7551 is added to the test message. After some thought, I decided that this
7554 This change does not affect the value of $received_for. It is still set
7555 after address rewriting, but before local_scan() is called.
7557 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7559 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7560 gave an unhelpful panic error message, and a defer error. I have managed to
7561 change this behaviour so that it now rejects any supplied certificate,
7562 which seems right, as the list of acceptable certificates is empty.
7564 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7565 gave an unhelpful defer error. I have not managed to make this reject any
7566 supplied certificates, but the error message it gives is "no certificate
7567 supplied", which is not helpful.
7569 70. exigrep's output now also includes lines that are not associated with any
7570 message, but which match the given pattern. Implemented by a patch from
7571 Martin Sluka, which also tidied up the Perl a bit.
7573 71. Recipient callout verification, like sender verification, was using <> in
7574 the MAIL FROM command. This isn't really the right thing, since the actual
7575 sender may affect whether the remote host accepts the recipient or not. I
7576 have changed it to use the actual sender in the callout; this means that
7577 the cache record is now keyed on a recipient/sender pair, not just the
7578 recipient address. There doesn't seem to be a real danger of callout loops,
7579 since a callout by the remote host to check the sender would use <>.
7580 [SEE ABOVE: changed after hitting problems.]
7582 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7583 temporary errors. However, in the case of such a code being given after
7584 the end of a data transmission (i.e. after ".") Exim was failing to write
7585 a retry record for the message. (Yes, there was some broken host that was
7586 actually sending 8xx at this point.)
7588 73. An unknown lookup type in a host list could cause Exim to panic-die when
7589 the list was checked. (An example that provoked this was putting <; in the
7590 middle of a list instead of at the start.) If this happened during a DATA
7591 ACL check, a -D file could be left lying around. This kind of configuration
7592 error no longer causes Exim to die; instead it causes a defer error. The
7593 incident is still logged to the main and panic logs.
7595 74. Buglet left over from Exim 3 conversion. The message "too many messages
7596 in one connection" was written to the rejectlog but not the mainlog, except
7597 when address rewriting (yes!) was being logged.
7599 75. Added write_rejectlog option.
7601 76. When a system filter was run not as root (that is, when system_filter_user
7602 was set), the values of the $n variables were not being returned to the
7603 main process; thus, they were not subsequently available in the $sn
7606 77. Added +return_path_on_delivery log selector.
7608 78. A connection timeout was being treated differently from recipients deferred
7609 when testing hosts_max_try with a message that was older than the host's
7610 retry timeout. (The host should not be counted, thus allowing all hosts to
7611 be tried at least once before bouncing.) This may have been the cause of an
7612 occasionally reported bug whereby a message would remain on the queue
7613 longer than the retry timeout, but would be bounced if a delivery was
7614 forced. I say "may" because I never totally pinned down the problem;
7615 setting up timeout/retry tests is difficult. See also the next item.
7617 79. The ultimate address timeout was not being applied to errors that involved
7618 a combination of host plus message (for example, a timeout on a MAIL
7619 command). When an address resolved to a number of possible hosts, and they
7620 were not all tried for each delivery (e.g. because of hosts_max_try), a
7621 message could remain on the queue longer than the retry timeout.
7623 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7626 81. Fixed an obscure SMTP outgoing bug which required at least the following
7627 conditions: (a) there was another message waiting for the same server;
7628 (b) the server returned 5xx to all RCPT commands in the first message so
7629 that the message was not completed; (c) the server dropped the connection
7630 or gave a negative response to the RSET that Exim sends to abort the
7631 transaction. The observed case was a dropped connection after DATA that had
7632 been sent in pipelining mode. That is, the server had advertised PIPELINING
7633 but was not implementing it correctly. The effect of the bug was incorrect
7634 behaviour, such as trying another host, and this could lead to a crash.
7640 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7641 and daemon.c were passed as pointers to ints; they should have been
7642 pointers to socklen_t variables (which are typically unsigned ints).
7644 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7647 3. Fixed a really odd bug that affected only the testing scheme; patching a
7648 certain fixed string in the binary changed the value of another string that
7649 happened to be identical to the end of the original first string.
7651 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7652 name", it returns that address as the IP address. On some operating
7653 systems (e.g. Solaris), it also passes back the IP address string as the
7654 "host name". However, on others (e.g. Linux), it passes back an empty
7655 string. Exim wasn't checking for this, and was changing the host name to an
7656 empty string, assuming it had been canonicalized.
7658 5. Although rare, it is permitted to have more than one PTR record for a given
7659 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7660 all the names associated with an address, because they do in Solaris.
7661 However, it seems that they do not in Linux for data that comes from the
7662 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7663 I found this out when I moved to a new Linux workstation and tried to run
7664 the Exim test suite.
7666 To get round this problem I have changed the code so that it now does its
7667 own call to the DNS to look up PTR records when searching for a host name.
7668 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7669 addresses that are only in /etc/hosts are still found.
7671 This behaviour is, however, controlled by an option called host_lookup_
7672 order, which defaults to "bydns:byaddr". If people want to use the other
7673 order, or indeed, just use one or the other means of lookup, they can
7674 specify it in this variable.
7676 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7677 some operating systems, this comes back from gethostbyaddr() as an empty
7678 string, and this is what Exim used to test for. However, it seems that in
7679 other systems, "." is yielded. Exim now tests for this case too.
7681 7. The values of check_spool_space and check_log_space are now held internally
7682 as a number of kilobytes instead of an absolute number of bytes. If a
7683 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7684 kilobyte. This means that much larger values can be stored.
7686 8. Exim monitor: an attempt to get the action menu when not actually pointing
7687 at a message produces an empty menu entitled "No message selected". This
7688 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7689 no entries in it ("Shell widget menu has zero width and/or height"). So I
7690 have added a single, blank menu entry in this case.
7692 9. Added ${quote_local_part.
7694 10. MIME decoding is now applied to the contents of Subject: header lines when
7697 11. Now that a reference to $sender_host_address automatically causes a reverse
7698 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7699 host lookup before query-style lookups in lists that might use this
7700 variable. This has therefore been abolished, and the "net-" prefix is no
7701 longer necessary for query-style lookups.
7703 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7704 have been a typo for LFLAGS, so it has been changed.
7706 13. The install script calls Exim with "-C /dev/null" in order to find the
7707 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7708 to be output. However, since Exim outputs its version number before the
7709 error, it didn't break the script. It just looked ugly. I fixed this by
7710 always allowing "-C /dev/null" if the caller is root.
7712 14. Ignore overlarge ACL variable number when reading spool file - insurance
7713 against a later release with more variables having written the file.
7715 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7716 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7717 this, as well as the form without the "IPv6" on the front.
7719 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7720 OS/Makefile-Darwin file.
7722 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7723 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7725 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7726 variable. However, some OS use ints for inodes. I've added cast to long int
7727 to get rid of the compiler warning.
7729 19. I had forgotten to lock out "/../" in configuration file names when
7730 ALT_CONFIG_PREFIX was set.
7732 20. Routers used for verification do not need to specify transports. However,
7733 if such a router generated a host list, and callout was configured, Exim
7734 crashed, because it could not find a port number from the (non-existent)
7735 transport. It now assumes port 25 in this circumstance.
7737 21. Added the -t option to exigrep.
7739 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7740 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7741 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7742 them is set, LOOKUP_LSEARCH is forced.
7744 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7746 24. Added sender and host information to the "rejected by local_scan()" log
7747 line; previously there was no indication of these.
7749 25. Added .include_if_exists.
7751 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7752 Linux. It turns out that not all file systems support this. Apparently some
7753 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7754 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7755 not supported on the file descriptor, is now ignored when Exim is trying to
7756 sync a directory. This applies only to Linux.
7758 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7760 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7761 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7764 29. Added support for maildirsize files from supplied patch (modified a bit).
7766 30. The use of :fail: followed by an empty string could lead Exim to respond to
7767 sender verification failures with (e.g.):
7769 550 Verification failed for <xxx>
7770 550 Sender verify failed
7772 where the first response line was missing the '-' that indicates it is not
7773 the final line of the response.
7775 31. The loop for finding the name of the user that called Exim had a hardwired
7776 limit of 10; it now uses the value of finduser_retries, which is used for
7777 all other user lookups.
7779 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7782 33. Exim was neglecting to zero errno before one call of strtol() when
7783 expanding a string and expecting an integer value. On some systems this
7784 resulted in spurious "integer overflow" errors. Also, it was casting the
7785 result into an int without checking.
7787 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7788 did not work. The code looks as if it has *never* worked, though it appears
7789 to have been documented since at least release 1.62. I have made it work.
7791 35. The "timeout_DNS" error in retry rules, also documented since at least
7792 1.62, also never worked. As it isn't clear exactly what this means, and
7793 clearly it isn't a major issue, I have abolished the feature by treating it
7794 as "timeout", and writing a warning to the main and panic logs.
7796 36. The display of retry rules for -brt wasn't always showing the error code
7799 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7800 timeout_connect_A, timeout_connect_MX.
7802 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7803 to the empty sender.
7805 39. The daemon was not analysing the content of -oX till after it had closed
7806 stderr and disconnected from the controlling terminal. This meant that any
7807 syntax errors were only noted on the panic log, and the return code from
7808 the command was 0. By re-arranging the code a little, I've made the
7809 decoding happen first, so such errors now appear on stderr, and the return
7810 code is 1. However, the actual setting up of the sockets still happens in
7811 the disconnected process, so errors there are still only recorded on the
7814 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7815 connections (as happens on some IP stacks) was logged at start up time as
7816 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7817 it from "IPv6 and IPv4", which means that two separate sockets are being
7820 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7821 says whether AF_INET or AF_INET6 was passed as an argument.
7823 42. Exiwhat output was messed up when time zones were included in log
7826 43. Exiwhat now gives more information about the daemon's listening ports,
7827 and whether -tls-on-connect was used.
7829 44. The "port" option of the smtp transport is now expanded.
7831 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7832 silently ignored. Now an error message is written to the main and panic
7835 46. There's a new ACL modifier called "logwrite" which writes to a log file
7836 as soon as it is encountered.
7838 47. Added $local_user_uid and $local_user_gid at routing time.
7840 48. Exim crashed when trying to verify a sender address that was being
7843 49. Exim was recognizing only a space character after ".include". It now also
7844 recognizes a tab character.
7846 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7847 extracting the relevant information from the specification. The man page no
7848 longer contains scrambled data for the -d option, and I've added a section
7849 at the front about calling Exim under different names.
7851 51. Added "extra_headers" argument to the "mail" command in filter files.
7853 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7856 53. Installed eximstats 1.29.
7858 54. Added transport_filter_timeout as a generic transport option.
7860 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7861 Cc: header lines. This was required by RFC 822, but it not required by RFC
7864 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7865 incoming messages that did not have them. Now it does so only if the
7866 message originates locally, that is, if there is no associated remote host
7867 address. When Resent- header lines are present, this applies to the Resent-
7868 lines rather than the non-Resent- lines.
7870 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7871 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7873 58. Messages for configuration errors now include the name of the main
7874 configuration file - useful now that there may be more than one file in a
7875 list (.included file names were always shown).
7877 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7878 for those rare installations that do not start the daemon as root or run it
7879 setuid root. I've cut out the call to initgroups() if the daemon is not
7882 60. The Exim user and group can now be bound into the binary as text strings
7883 that are looked up at the start of Exim's processing.
7885 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7887 62. Added $mailstore_basename variable.
7889 63. Installed patch to sieve.c from Michael Haardt.
7891 64. When Exim failed to open the panic log after failing to open the main log,
7892 the original message it was trying to log was written to stderr and debug
7893 output, but if they were not available (the usual case in production), it
7894 was lost. Now it is written to syslog before the two lines that record the
7895 failures to open the logs.
7897 65. Users' Exim filters run in subprocesses under the user's uid. It is
7898 possible for a "deliver" command or an alias in a "personal" command to
7899 provoke an address rewrite. If logging of address rewriting is configured,
7900 this fails because the process is not running as root or exim. There may be
7901 a better way of dealing with this, but for the moment (because 4.30 needs
7902 to be released), I have disabled address rewrite logging when running a
7903 filter in a non-root, non-exim process.
7909 1. The buildconfig auxiliary program wasn't quoting the value set for
7910 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7911 not defined. This bug was masked in 4.22 by the effect that was fixed in
7914 2. Some messages that were rejected after a message id was allocated were
7915 shown as "incomplete" by exigrep. It no longer does this for messages that
7916 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7918 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7919 have allow_domain_literals set, the ID did not get logged in the <= line.
7920 Domain literals are now always recognized in Message-ID: header lines.
7922 4. The first argument for a ${extract expansion item is the key name or field
7923 number. Leading and trailing spaces in this item were not being ignored,
7924 causing some misleading effects.
7926 5. When deliver_drop_privilege was set, single queue runner processes started
7927 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7928 same command in the process it spins off) were not dropping privilege.
7930 6. When the daemon running as "exim" started a queue runner, it always
7931 re-executed Exim in the spun-off process. This is a waste of effort when
7932 deliver_drop_privilege is set. The new process now just calls the
7933 queue-runner function directly.
7939 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7942 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7943 ignored. Though the use of -oP was forcing the writing of a pid file, it
7944 was always written to the default place.
7946 3. If the message "no IP address found for host xxxx" is generated during
7947 incoming verification, it is now followed by identification of the incoming
7948 connection (so you can more easily find what provoked it).
7950 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7952 5. Added some features to "harden" Exim a bit more against certain attacks:
7954 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7955 be put in Local/Makefile. This is like the never_users runtime option,
7956 but it cannot be overridden. The default setting is "root".
7958 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7959 prefix string with which any file named in a -C command line option
7962 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7963 is retained for -C and -D only if the caller of Exim is root. Without
7964 it, the exim user may also use -C and -D and retain privilege.
7966 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7967 command line option is disabled.
7969 6. Macro names set by the -D option must start with an upper case letter, just
7970 like macro names defined in the configuration file.
7972 7. Added "dereference=" facility to LDAP.
7974 8. Two instances of the typo "uknown" in the source files are fixed.
7976 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7977 the Configure-Makefile script screwed up while processing it.
7979 10. Incorporated PCRE 4.4.
7981 11. The SMTP synchronization check was not operating right at the start of an
7982 SMTP session. For example, it could not catch a HELO sent before the client
7983 waited for the greeting. There is now a check for outstanding input at the
7984 point when the greeting is written. Because of the duplex, asynchronous
7985 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7986 way, but not yet received, when the check is performed.
7988 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7989 on TCP/IP sockets, because this apparently causes some broken clients to
7992 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7993 unchanged) from the Cygwin maintainer.
7995 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7996 was supported instead of testing for mbx. Effectively a typo.
7998 15. The spa authenticator server code was not checking that the input it
7999 received was valid base64.
8001 16. The debug output line for the "set" modifier in ACLs was not showing the
8002 name of the variable that was being set.
8004 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8006 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8007 lookup on its own. Something else was needed to trigger the lookup. For
8008 example, a match in host_lookup or the need for a host name in a host list.
8009 Now, if $sender_host_name is referenced and the host name has not yet been
8010 looked up, a lookup is performed. If the lookup fails, the variable remains
8011 empty, and $host_lookup_failed is set to "1".
8013 19. Added "eqi" as a case-independent comparison operator.
8015 20. The saslauthd authentication condition could segfault if neither service
8016 nor realm was specified.
8018 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8019 error message that was logged was misleading, and incoming SMTP
8020 connections were dropped. The message is now more accurate, and temporary
8021 errors are given to SMTP connections.
8023 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8024 (except RSET) with a 421 error, until QUIT is received. However, it was
8025 failing to send a response to QUIT.
8027 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8028 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8029 ACL is now run after the helo_try_verify_hosts code.
8031 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8032 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8033 case-independent, so other case variants are also recognized). Apparently
8034 some systems use these upper case variants.
8036 25. If more than two messages were waiting for the same host, and a transport
8037 filter was specified for the transport, Exim sent two messages over the
8038 same TCP/IP connection, and then failed with "socket operation on non-
8039 socket" when it tried to send the third.
8041 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8043 27. The extern definition of crypt16() in expand.c was not being excluded when
8044 the OS had its own crypt16() function.
8046 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8047 as a preferred synonym for return_size_limit, both as an option and as an
8050 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8052 30. Changed the default configuration ACL to relax the local part checking rule
8053 for addresses that are not in any local domains. For these addresses,
8054 slashes and pipe symbols are allowed within local parts, but the sequence
8055 /../ is explicitly forbidden.
8057 31. SPA server authentication was not clearing the challenge buffer before
8060 32. log_message in a "warn" ACL statement was writing to the reject log as
8061 well as to the main log, which contradicts the documentation and doesn't
8062 seem right (because no rejection is happening). So I have stopped it.
8064 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8065 However, I am unable to do any testing of this.
8067 34. Fixed an infelicity in the appendfile transport. When checking directories
8068 for a mailbox, to see if any needed to be created, it was accidentally
8069 using path names with one or more superfluous leading slashes; tracing
8070 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8072 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8073 contents are added to the log line that is written for every discarded
8074 recipient. (Previously a log_message setting was ignored.)
8076 36. The ${quote: operator now quotes the string if it is empty.
8078 37. The install script runs exim in order to find its version number. If for
8079 some reason other than non-existence or emptiness, which it checks, it
8080 could not run './exim', it was installing it with an empty version number,
8081 i.e. as "exim-". This error state is now caught, and the installation is
8084 38. An argument was missing from the function that creates an error message
8085 when Exim fails to connect to the socket for saslauthd authentication.
8086 This could cause Exim to crash, or give a corrupted message.
8088 39. Added isip, isip4, and isip6 to ${if conditions.
8090 40. The ACL variables $acl_xx are now saved with the message, and can be
8091 accessed later in routers, transports, and filters.
8093 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8094 strings in the file are not string-expanded.
8096 42. If a MAIL command specified a SIZE value that was too large to fit into an
8097 int variable, the check against message_size_limit failed. Such values are
8098 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8099 day this will have to be increased, but I don't think I want to be around
8100 when emails are that large.
8107 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8108 iconv() is not standard in FreeBSD.
8110 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8111 IPv6 enabled. The observed symptom was a segmentation fault on return from
8112 the function os_common_find_running_interfaces() in src/os.c.
8114 3. In the check_special_case() function in daemon.c I had used "errno" as an
8115 argument name, which causes warnings on some systems. This was basically a
8116 typo, since it was named "eno" in the comments!
8118 4. The code that waits for the clock to tick (at a resolution of some fraction
8119 of a second) so as to ensure message-id uniqueness was always waiting for
8120 at least one whole tick, when it could have waited for less. [This is
8121 almost certainly not relevant at current processor speeds, where it is
8122 unlikely to ever wait at all. But we try to future-proof.]
8124 5. The function that sleeps for a time interval that includes fractions of a
8125 second contained a race. It did not block SIGALRM between setting the
8126 timer, and suspending (a couple of lines later). If the interval was short
8127 and the sigsuspend() was delayed until after it had expired, the suspension
8128 never ended. On busy systems this could lead to processes getting stuck for
8131 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8132 process, before it forks any delivery processes. The open lookup caching
8133 mechanism meant that the open file or database connection was passed into
8134 the delivery process. The problem was that delivery processes always tidy
8135 up cached lookup data. This could cause a problem for the next delivery
8136 process started by the queue runner, because the external queue runner
8137 process does not know about the closure. So the next delivery process
8138 still has data in the lookup cache. In the case of a file lookup, there was
8139 no problem because closing a file descriptor in a subprocess doesn't affect
8140 the parent. However, if the lookup was caching a connection to a database,
8141 the connection was closed, and the second delivery process was likely to
8142 see errors such as "PGSQL: query failed: server closed the connection
8143 unexpectedly". The problem has been fixed by closing all cached lookups
8144 in a queue runner before running a delivery process.
8146 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8147 seem to have the "const" qualifier which it has on other OS. I've
8150 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8151 *of the same type* (client or server) with the same public name that an
8152 error should be diagnosed.
8154 9. When Exim looked up a host name for an IP address, but failed to find the
8155 original IP address when looking up the host name (a safety check), it
8156 output the message "<ip address> does not match any IP for NULL", which was
8157 confusing, to say the least. The bug was that the host name should have
8158 appeared instead of "NULL".
8160 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8161 user that is built into the binary, and the -C or -D options is used, root
8162 privilege is dropped before the configuration file is read. In addition,
8163 logging is switched to stderr instead of the normal log files. If the
8164 configuration then re-defines the Exim user, the unprivileged environment
8165 is probably not what is expected, so Exim logs a panic warning message (but
8168 However, if deliver_drop_privilege is set, the unprivileged state may well
8169 be exactly what is intended, so the warning has been cut out in that case,
8170 and Exim is allowed to try to write to its normal log files.
8176 1. smtp_return_error_details was not giving details for temporary sender
8177 or receiver verification errors.
8179 2. Diagnose a configuration error if two authenticators have the same public
8182 3. Exim used not to create the message log file for a message until the first
8183 delivery attempt. This could be confusing when incoming messages were held
8184 for policy or load reasons. The message log file is now created at the time
8185 the message is received, and an initial "Received" line is written to it.
8187 4. The automatically generated man page for command line options had a minor
8188 bug that caused no ill effects; however, a more serious problem was that
8189 the procedure for building the man page automatically didn't always
8190 operate. Consequently, release 4.20 contains an out-of-date version. This
8191 shouldn't happen again.
8193 5. When building Exim with embedded Perl support, the script that builds the
8194 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8195 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8197 6. The freeze_tell option was not being used for messages that were frozen on
8198 arrival, either by an ACL or by local_scan().
8200 7. Added the smtp_incomplete_transaction log selector.
8202 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8203 was accepting AUTH without a new EHLO.
8205 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8206 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8209 10. Logging of TCP/IP connections (when configured) now happens in the main
8210 daemon process instead of the child process, so that the TCP/IP connection
8211 count is more accurate (but it can never be perfect).
8213 11. The use of "drop" in a nested ACL was not being handled correctly in the
8214 outer ACL. Now, if condition failure induced by the nested "drop" causes
8215 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8216 or "require"), the connection is dropped.
8218 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8219 that yield "discard" can now be used with an "accept" or a "discard" verb,
8220 but an error is generated for any others (because I can't see a useful way
8221 to define what should happen).
8223 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8224 are now processed in the same way as lines in the Exim configuration file.
8225 In particular, continuation lines are supported.
8227 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8229 15. Added -ti meaning -t -i.
8231 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8232 domains, and warn by logging if others are found.
8234 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8235 returned from GIFCONF when Exim is trying to find the list of interfaces on
8236 a host. The code in os.c has been modified to copy each ifreq to an aligned
8237 structure in all cases.
8239 Also, in some cases, the returned ifreq's were being copied to a 'struct
8240 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8241 means the last couple of bytes of an IPv6 address could be chopped if the
8242 ifreq contained only a normal sockaddr (14 bytes storage).
8244 18. Named domain lists were not supported in the hosts_treat_as_local option.
8245 An entry such as +xxxx was not recognized, and was treated as a literal
8248 19. Ensure that header lines added by a DATA ACL are included in the reject log
8249 if the ACL subsequently rejects the message.
8251 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8252 MD5 (which is deprecated).
8254 21. When testing a filter file using -bf, Exim was writing a message when it
8255 took the sender from a "From " line in the message, but it was not doing so
8256 when it took $return_path from a Return-Path: header line. It now does.
8258 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8259 with a valid header line field name (a series of printing characters
8260 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8262 23. Changed "disc" in the source to "disk" to conform to the documentation and
8263 the book and for uniformity.
8265 24. Ignore Sendmail's -Ooption=value command line item.
8267 25. When execve() failed while trying to run a command in a pipe transport,
8268 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8269 could be confused with a return value of 69 from the command itself. This
8270 has been changed to 127, the value the shell returns if it is asked to run
8271 a non-existent command. The wording for the related log line suggests a
8272 non-existent command as the problem.
8274 26. If received_header_text expands to an empty string, do not add a Received:
8275 header line to the message. (Well, it adds a token one on the spool, but
8276 marks it "old" so that it doesn't get used or transmitted.)
8278 27. Installed eximstats 1.28 (addition of -nt option).
8280 28. There was no check for failure on the call to getsockname() in the daemon
8281 code. This can fail if there is a shortage of resources on the system, with
8282 ENOMEM, for example. A temporary error is now given on failure.
8284 29. Contrary to the C standard, it seems that in some environments, the
8285 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8286 program. Exim now does this explicitly; it affects the formatting of
8287 timestamps using strftime().
8289 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8290 complaints. I've now initialized all the variables, to avoid this.
8292 32. Header lines added by a system filter were not being "seen" during
8293 transport-time rewrites.
8295 33. The info_callback() function passed to OpenSSL is set up with type void
8296 (*)(SSL *, int, int), as described somewhere. However, when calling the
8297 function (actually a macro) that sets it up, the type void(*)() is
8298 expected. I've put in a cast to prevent warnings from picky compilers.
8300 34. If a DNS black list lookup found a CNAME record, but there were no A
8301 records associated with the domain it pointed at, Exim crashed.
8303 35. If a DNS black list lookup returned more than one A record, Exim ignored
8304 all but the first. It now scans all returned addresses if a particular IP
8305 value is being sought. In this situation, the contents of the
8306 $dnslist_value variable are a list of all the addresses, separated by a
8309 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8310 to accept a host name and all its aliases if the forward lookup for any of
8311 them yielded the IP address of the incoming connection. Now it accepts only
8312 those names whose forward lookup yields the correct IP address. Any other
8313 names are discarded. This closes a loophole whereby a rogue DNS
8314 administrator could create reverse DNS records to break through a
8315 wildcarded host restriction in an ACL.
8317 37. If a user filter or a system filter that ran in a subprocess used any of
8318 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8319 the wrong values were passed to the pipe command ($thisaddress had the
8320 value of $0, $0 had the value of $1, etc). This bug was introduced by
8321 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8323 38. Improved the line breaking for long SMTP error messages from ACLs.
8324 Previously, if there was no break point between 40 and 75 characters, Exim
8325 left the rest of the message alone. Two changes have been made: (a) I've
8326 reduced the minimum length to 35 characters; (b) if it can't find a break
8327 point between 35 and 75 characters, it looks ahead and uses the first one
8328 that it finds. This may give the occasional overlong line, but at least the
8329 remaining text gets split now.
8331 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8332 file descriptors might be low, and that setting 1000 would always raise it.
8333 It turns out that in some environments, the limit is already over 1000 and
8334 that lowering it causes trouble. So now Exim takes care not to decrease it.
8336 40. When delivering a message, the value of $return_path is set to $sender_
8337 address at the start of routing (routers may change the value). By an
8338 oversight, this default was not being set up when an address was tested by
8339 -bt or -bv, which affected the outcome if any router or filter referred to
8342 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8343 log only when "message" or "log_message" are set. However, if one of the
8344 conditions was an address verification, or a call to a nested ACL, the
8345 messages generated by the underlying test were being passed through. This
8346 no longer happens. The underlying message is available in $acl_verify_
8347 message for both "message" and "log_message" expansions, so it can be
8348 passed through if needed.
8350 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8351 new expansion $bh_ to give the encoded byte string without charset
8352 translation. Translation happens only if iconv() is available; HAVE_ICONV
8353 indicates this at build time. HEADERS_CHARSET gives the charset to
8354 translate to; headers_charset can change it in the configuration, and
8355 "headers charset" can change it in an individual filter file.
8357 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8358 that creates RFC 2047 encoded "words" labels them as that charset instead
8359 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8360 expansion operator; (ii) when Exim creates a From: line for a local
8361 message; (iii) when a header line is rewritten to include a "phrase" part.
8363 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8364 buggy, causing it to skip the first lines of messages whose message ID
8365 ended in 'D'. This would not have bitten before Exim release 4.14, because
8366 message IDs were unlikely to end in 'D' before then. The effect was to have
8367 incorrect size information for certain domains.
8369 45. #include "config.h" was missing at the start of the crypt16.c module. This
8370 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8373 46. If there was a timeout during a "random" callout check, Exim treated it as
8374 a failure of the random address, and carried on sending RSET and the real
8375 address. If the delay was just some slowness somewhere, the response to the
8376 original RCPT would be taken as a response to RSET and so on, causing
8377 mayhem of various kinds.
8379 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8380 when I implemented it. It didn't allow for the fact that some option values
8381 may legitimately be negative (e.g. size_addition), and it didn't even do
8382 the right test for positive values.
8384 48. Domain names in DNS records are case-independent. Exim always looks them up
8385 in lower case. Some resolvers return domain names in exactly the case they
8386 appear in the zone file, that is, they may contain uppercase letters. Not
8387 all resolvers do this - some return always lower case. Exim was treating a
8388 change of case by a resolver as a change of domain, similar to a widening
8389 of a domain abbreviation. This triggered its re-routing code and so it was
8390 trying to route what was effectively the same domain again. This normally
8391 caused routing to fail (because the router wouldn't handle the domain
8392 twice). Now Exim checks for this case specially, and just changes the
8393 casing of the domain that it ultimately uses when it transmits the message
8396 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8399 50. If a filter generated a file delivery with a non-absolute name (possible if
8400 no home directory exists for the router), the forbid_file option was not
8403 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8404 the existing equality matching.
8406 52. Exim was using ints instead of ino_t variables in some places where it was
8407 dealing with inode numbers.
8409 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8410 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8411 called TMPDIR, and if it finds it is different, it changes its value.
8413 54. The smtp_printf() function is now made available to local_scan() so
8414 additional output lines can be written before returning. There is also an
8415 smtp_fflush() function to enable the detection of a dropped connection.
8416 The variables smtp_input and smtp_batched_input are exported to
8419 55. Changed the default runtime configuration: the message "Unknown user"
8420 has been removed from the ACL, and instead placed on the localuser router,
8421 using the cannot_route_message feature. This means that any verification
8422 failures that generate their own messages won't get overridden. Similarly,
8423 the "Unrouteable address" message that was in the ACL for unverifiable
8424 relay addresses has also been removed.
8426 56. Added hosts_avoid_esmtp to the smtp transport.
8428 57. The exicyclog script was not checking for the esoteric option
8429 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8430 will work only if exicyclog is run under the appropriate euid.
8432 58. Following a discussion on the list, the rules by which Exim recognises line
8433 endings on incoming messages have been changed. The -dropcr and drop_cr
8434 options are now no-ops, retained only for backwards compatibility. The
8435 following line terminators are recognized: LF CRLF CR. However, special
8436 processing applies to CR:
8438 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8439 nor a local message in the state where . is a terminator.
8441 (ii) If a bare CR is encountered in a header line, an extra space is added
8442 after the line terminator so as not to end the header. The reasoning
8443 behind this is that bare CRs in header lines are most likely either
8444 to be mistakes, or people trying to play silly games.
8446 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8447 was being incorrectly given as 18 bytes larger than it should have been.
8448 This is a VOB (very old bug).
8450 60. This may never have affected anything current, but just in case it has:
8451 When the local host is found other than at the start of a list of hosts,
8452 the local host, those with the same MX, and any that follow, are discarded.
8453 When the list in question was part of a longer list of hosts, the following
8454 hosts (not currently being processed) were also being discarded. This no
8455 longer happens. I'm not sure if this situation could ever has previously
8458 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8461 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8462 header. This is something that is recommended in a new Internet Draft, and
8463 is something that is documented as being done by Sendmail. There are two
8464 possible values. For messages generated by the autoreply transport, Exim
8467 Auto-Submitted: auto-replied
8469 whereas for all other generated messages (e.g. bounces) it adds
8471 Auto-Submitted: auto-generated
8473 63. The "personal" condition in filters now includes a test for the
8474 Auto-Submitted: header. If it contains the string "auto-" the message it
8475 not considered personal.
8477 64. Added rcpt_include_affixes as a generic transport option.
8479 65. Added queue_only_override (default true).
8481 66. Added the syslog_duplication option.
8483 67. If what should have been the first header line of a message consisted of
8484 a space followed by a colon, Exim was mis-interpreting it as a header line.
8485 It isn't of course - it is syntactically invalid and should therefore be
8486 treated as the start of the message body. The misbehaviour could have
8487 caused a number of strange effects, including loss of data in subsequent
8488 header lines, and spool format errors.
8490 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8491 client host had authenticated. This control can now be exercised by an ACL
8492 for more flexibility.
8494 69. By default, callouts do not happen when testing with -bh. There is now a
8495 variant, -bhc, which does actually run the callout code, including
8496 consulting and updating the callout cache.
8498 70. Added support for saslauthd authentication, courtesy of Alexander
8501 71. If statvfs() failed on the spool or log directories while checking their
8502 size for availability, Exim confusingly gave the error "space shortage".
8503 Furthermore, in debugging mode it crashed with a floating point exception.
8504 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8505 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8506 serious problem, Exim now writes to the main and panic logs when this
8507 happens, with details of the failure. It then refuses to accept the
8508 incoming message, giving the message "spool directory problem" or "log
8509 directory problem" with a 421 code for SMTP messages.
8511 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8512 0, 1, and 2 exist, because some OS complain for execs without them (see
8513 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8514 descriptors. However, the code omitted to check that the open succeeded,
8515 causing mysterious errors if for some reason the permissions on /dev/null
8516 got screwed. Now Exim writes a message to the main and panic logs, and
8517 bombs out if it can't open /dev/null.
8519 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8520 interact so that it is all more flexible. It is supposed to remain
8521 backwards compatible. Also added extra_local_interfaces.
8523 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8524 to bomb out with an assertion failure - to the client this appears as a
8525 connection drop. This problem occurs in the part of the code that was taken
8526 from the Samba project. Fortunately, the assertion is in a very simple
8527 function, so I have fixed this by reproducing the function inline in the
8528 one place where it is called, and arranging for authentication to fail
8529 instead of killing the process with assert().
8531 75. The SPA client code was not working when the server requested OEM rather
8532 than Unicode encoding.
8534 76. Added code to make require_files with a specific uid setting more usable in
8535 the case where statting the file as root fails - usually a non-root-mounted
8536 NFS file system. When this happens and the failure is EACCES, Exim now
8537 forks a subprocess and does the per-uid checking as the relevant uid.
8539 77. Added process_log_path.
8541 78. If log_file_path was not explicitly set, a setting of check_log_space or
8542 check_log_inodes was ignored.
8544 79. If a space check for the spool or log partitions fails, the incident is now
8545 logged. Of course, in the latter case the data may get lost...
8547 80. Added the %p formatting code to string_format() so that it can be used to
8548 print addresses in debug_print(). Adjusted all the address printing in the
8549 debugging in store.c to use %p rather than %d.
8551 81. There was a concern that a line of code in smtp_in.c could overflow a
8552 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8553 initially expressed, the concern was not well-founded, because trailing
8554 spaces are removed early. However, if the trailing spaces were followed by
8555 a NULL, they did not get removed, so the overflow was possible. Two fixes
8558 (a) I re-wrote the offending code in a cleaner fashion.
8559 (b) If an incoming SMTP command contains a NULL character, it is rejected
8562 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8563 runs initgroups(), so that if the Exim user is in any additional groups,
8564 they will be used during message reception.
8570 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob