1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
10 HS/01 Handle trailing backslash gracefully. (CVE-2019-15846)
16 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
22 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
23 buffer overrun for (non-chunking) other transports.
25 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
26 TLS1.3, means that a server rejecting a client certificate is not visible
27 to the client until the first read of encrypted data (typically the
28 response to EHLO). Add detection for that case and treat it as a failed
29 TLS connection attempt, so that the normal retry-in-clear can work (if
32 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
33 and/or domain. Found and fixed by Jason Betts.
35 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
36 configuration). If a CNAME target was not a wellformed name pattern, a
39 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
40 the OS reports them interleaved with other addresses.
42 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
43 used both for input and for a verify callout, both encrypted, SMTP
44 responses being sent by the server could be lost. This resulted in
45 dropped connections and sometimes bounces generated by a peer sending
48 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
49 string. Previously it was possible to cause undefined behaviour in a
50 library routine (usually a crash). Found by "zerons".
52 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
55 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
56 API was removed, so update to use the newer ones.
59 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
60 to changes apparently associated with TLS1.3 handling some of the APIs
61 previously used were either nonfunctional or inappropriate. Strings
62 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
63 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
64 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
65 This affects log line X= elements, the $tls_{in,out}_cipher variables,
66 and the use of specific cipher names in the encrypted= ACL condition.
68 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
69 verification result was not updated unless hosts_require_ocsp applied.
75 JH/01 Remove code calling the customisable local_scan function, unless a new
76 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
78 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
79 non-signal-safe functions being used.
81 JH/03 Bug 2269: When presented with a received message having a stupidly large
82 number of DKIM-Signature headers, disable DKIM verification to avoid
83 a resource-consumption attack. The limit is set at twenty.
85 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
86 report of oldest_pass in ${authres } in consequence, and separate out
87 some descriptions of reasons for verification fail.
89 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
90 files in the spool were present and unlocked. A queue-runner could spot
91 them, resulting in a duplicate delivery. Fix that by doing the unlock
92 after the unlink. Investigation by Tim Stewart. Take the opportunity to
93 add more error-checking on spoolfile handling while that code is being
96 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
97 No known attacks, no CVE, this is defensive hardening.
99 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
100 a queue-runner could start a delivery while other operations were ongoing.
101 Cutthrough delivery was a common victim, resulting in duplicate delivery.
102 Found and investigated by Tim Stewart. Fix by using the open message data
103 file handle rather than opening another, and not locally closing it (which
104 releases a lock) for that case, while creating the temporary .eml format
105 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
107 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
108 $sender_verify_failure/$recipient_verify_failure to "random".
110 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
113 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
114 Previously this would segfault.
116 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
119 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
120 like zero, since the resolver should be doing this for us, But we need one
121 as a CNAME but no MX presence gets the CNAME returned; we need to check
122 that doesn't point to an MX to declare it "no MX returned" rather than
123 "error, loop". A new main option is added so the older capability of
124 following some limited number of chain links is maintained.
126 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
128 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
129 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
130 now-deprecated earlier definitions used only specified the range up to TLS
131 1.2 (in the older-version library docs).
133 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
135 JH/15 Rework TLS client-side context management. Stop using a global, and
136 explicitly pass a context around. This enables future use of TLS for
137 connections to service-daemons (eg. malware scanning) while a client smtp
138 connection is using TLS; with cutthrough connections this is quite likely.
140 JH/16 Fix ARC verification to do AS checks in reverse order.
142 JH/17 Support a "tls" option on the ${readsocket } expansion item.
144 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
145 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
146 Previously the "utf8" would be re-prepended for every additional message.
148 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
149 Previously thery were accepted, resulting in issues when attempting to
150 forward messages to a non-supporting MTA.
152 PP/02 Let -n work with printing macros too, not just options.
154 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
155 one parent address was copied, and bogus data was used at delivery-logging
156 time. Either a crash (after delivery) or bogus log data could result.
157 Discovery and analysis by Tim Stewart.
159 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
160 Previously if the string ended mid-character, we did not insert the
161 promised '?' replacement.
163 PP/04 Documentation: current string operators work on bytes, not codepoints.
165 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
166 should pack well giving a smaller memory footprint so better caching and
167 therefore performance. Group the declarations where this can't be done so
168 that the byte-sized flag variables are not interspersed among pointer
169 variables, giving a better chance of good packing by the compiler.
171 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
172 non-null, to avoid issues with sites running BATV. Previously reports were
173 sent with an empty envelope sender so looked like bounces.
175 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
176 The ignore_error flag wasn't being returned from the filter subprocess so
177 was not set for later routers. Investigation and fix by Matthias Kurz.
179 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
180 and a msg:complete for the whole, when a message is manually removed using
181 -Mrm. Developement by Matthias Kurz, hacked on by JH.
183 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
184 a "Gnu special" function, asprintf() in the DB utility binary builds; I
185 hope that is portable enough.
187 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
188 requiring a known-CA anchor certificate; make it now rely entirely on the
189 TLSA as an anchor. Checking the name on the leaf cert against the name
190 on the A-record for the host is still done for TA (but not for EE mode).
192 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
193 included in delivery lines for non-proxied connections, when compiled with
194 SUPPORT_SOCKS and running with proxy logging enabled.
196 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
197 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
198 move the existing event to fire before the normal logging of message
199 failure so that custom logging is bracketed by normal logging.
201 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
202 msg:fail:internal event. Developement by Matthias Kurz.
204 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
205 far too small for todays use of crypto signatures stored there. Go all
206 the way to the max DNS message size of 64kB, even though this might be
207 overmuch for IOT constrained device use.
209 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
210 copy a string over itself. The library routine is documented as not
211 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
213 JH/32 For main options check_spool_space and check_inode_space, where the
214 platform supports 64b integers, support more than the previous 2^31 kB
215 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
216 the previous G, M, k.
218 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
219 $authenticated_fail_id variable on authentication failure. Previously
222 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
223 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
224 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
225 GNUTLS_SEC_PARAM_MEDIUM.
227 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
228 side. Previously we would continue as if no SNI had been received.
230 JH/36 Harden the handling of string-lists. When a list consisted of a sole
231 "<" character, which should be a list-separator specification, we walked
232 off past the nul-terimation.
234 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
235 causes) even when the retry time is not yet met. Previously they were
236 not, meaning that when (say) an account was over-quota and temp-rejecting,
237 and multiple senders' messages were queued, only one sender would get
238 notified on each configured delay_warning cycle.
240 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
242 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
243 cipher-suites, an error can be left on the stack even for a succeeding
244 accept; this results in impossible error messages when a later operation
247 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
248 return error codes indicating retry. Under TLS1.3 this becomes required.
250 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
251 it only wrote the new authenticators, resulting in a lack of tracking of
252 peer changes of ESMTP extensions until the next cache flush.
254 JH/41 Fix the loop reading a message header line to check for integer overflow,
255 and more-often against header_maxsize. Previously a crafted message could
256 induce a crash of the recive process; now the message is cleanly rejected.
258 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
259 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
265 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
266 When redis_servers is set to a list of > 1 element, and the Redis servers
267 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
268 case of MOVED into a DEFER case instead, thus moving the query onto the
269 next server in the list. For a cluster of N elements, all N servers must
270 be defined in redis_servers.
272 GF/02 Catch and remove uninitialized value warning in exiqsumm
273 Check for existence of @ARGV before looking at $ARGV[0]
275 JH/01 Replace the store_release() internal interface with store_newblock(),
276 which internalises the check required to safely use the old one, plus
277 the allocate and data copy operations duplicated in both (!) of the
278 extant use locations.
280 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
281 modifier. This matches the restriction on the commandline.
283 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
284 Previously only the last row was returned.
286 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
287 we assumed that tags in the header were well-formed, and parsed the
288 element content after inspecting only the first char of the tag.
289 Assumptions at that stage could crash the receive process on malformed
292 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
293 While running the DKIM ACL we operate on the Permanent memory pool so that
294 variables created with "set" persist to the DATA ACL. Also (at any time)
295 DNS lookups that fail create cache records using the Permanent pool. But
296 expansions release any allocations made on the current pool - so a dnsdb
297 lookup expansion done in the DKIM ACL releases the memory used for the
298 DNS negative-cache, and bad things result. Solution is to switch to the
299 Main pool for expansions.
300 While we're in that code, add checks on the DNS cache during store_reset,
301 active in the testsuite.
302 Problem spotted, and debugging aided, by Wolfgang Breyha.
304 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
305 When none of the hosts presented to a transport match an already-open
306 connection, close it and proceed with the list. Previously we would
307 queue the message. Spotted by Lena with Yahoo, probably involving
310 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
311 Previously a spurious "250 OK id=" response was appended to the proper
314 JH/08 The "support for" informational output now, which built with Content
315 Scanning support, has a line for the malware scanner interfaces compiled
316 in. Interface can be individually included or not at build time.
318 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
319 by the template makefile "src/EDITME". The "STREAM" support for an older
320 ClamAV interface method is removed.
322 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
323 rows affected is given instead).
325 JH/11 The runtime Berkeley DB library version is now additionally output by
326 "exim -d -bV". Previously only the compile-time version was shown.
328 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
329 SMTP connection. Previously, when one had more receipients than the
330 first, an abortive onward connection was made. Move to full support for
331 multiple onward connections in sequence, handling cutthrough connection
332 for all multi-message initiating connections.
334 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
335 routers. Previously, a multi-recipient message would fail to match the
336 onward-connection opened for the first recipient, and cause its closure.
338 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
339 a timeout on read on a GnuTLS initiating connection, resulting in the
340 initiating connection being dropped. This mattered most when the callout
341 was marked defer_ok. Fix to keep the two timeout-detection methods
344 JH/15 Relax results from ACL control request to enable cutthrough, in
345 unsupported situations, from error to silently (except under debug)
346 ignoring. This covers use with PRDR, frozen messages, queue-only and
349 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
351 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
352 metadata, resulting in a crash in free().
354 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
355 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
356 Broken also in d185889f4, with init system revamp.
358 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
359 Previously we abruptly closed the connection after reading a malware-
360 found indication; now we go on to read the "scan ok" response line,
363 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
364 ACL. Previously, a crash would result.
366 JH/19 Speed up macro lookups during configuration file read, by skipping non-
367 macro text after a replacement (previously it was only once per line) and
368 by skipping builtin macros when searching for an uppercase lead character.
370 JH/20 DANE support moved from Experimental to mainline. The Makefile control
371 for the build is renamed.
373 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
374 was allocated for every new TLS startup, meaning one per message. Fix
375 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
377 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
378 reported the original. Fix to report (as far as possible) the ACL
379 result replacing the original.
381 JH/23 Fix memory leak during multi-message connections using STARTTLS under
382 OpenSSL. Certificate information is loaded for every new TLS startup,
383 and the resources needed to be freed.
385 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
387 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
390 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
391 DATA response info to the (existing) per-recipient response info for
392 the "C=" log element. It can have useful tracking info from the
393 destination system. Patch from Simon Arlott.
395 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
396 length value. Previously this would segfault.
398 HS/02 Support Avast multiline protoocol, this allows passing flags to
399 newer versions of the scanner.
401 JH/28 Ensure that variables possibly set during message acceptance are marked
402 dead before release of memory in the daemon loop. This stops complaints
403 about them when the debug_store option is enabled. Discovered specifically
404 for sender_rate_period, but applies to a whole set of variables.
405 Do the same for the queue-runner and queue-list loops, for variables set
406 from spool message files. Do the same for the SMTP per-message loop, for
407 certain variables indirectly set in ACL operations.
409 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
410 as a multi-recipient message from a mailinglist manager). The coding had
411 an arbitrary cutoff number of characters while checking for more input;
412 enforced by writing a NUL into the buffer. This corrupted long / fast
413 input. The problem was exposed more widely when more pipelineing of SMTP
414 responses was introduced, and one Exim system was feeding another.
415 The symptom is log complaints of SMTP syntax error (NUL chars) on the
416 receiving system, and refused recipients seen by the sending system
417 (propating to people being dropped from mailing lists).
418 Discovered and pinpointed by David Carter.
420 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
421 replaced by the ${authresults } expansion.
423 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
425 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
426 allows proper process termination in container environments.
428 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
429 Previously the "final dot" had a newline after it; ensure it is CR,LF.
431 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
432 and "err_perm", deprecated since 4.83 when the RFC-defined words
433 "temperror" and "permerror" were introduced.
435 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
436 transport-filters or DKIM-signing. The restriction was lost in the
437 consolidation of verify-callout and delivery SMTP handling.
438 Extend the restriction to also cover ARC-signing.
440 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
441 in defer=pass mode supply a 450 to the initiator. Previously the message
444 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
445 tls_require_ciphers is used as before.
447 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
448 "pass_unscanned". Only tmpfails from the scanner are written to
449 the paniclog, as they may require admin intervention (permission
450 denied, license issues). Other scanner errors (like decompression
451 bombs) do not cause a paniclog entry.
453 JH/36 Fix reinitialisation of DKIM logging variable between messages.
454 Previously it was possible to log spurious information in receive log
457 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
458 triggered odd behaviour from Outlook Express clients.
460 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
463 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
464 since the IETF WG has not yet settled on that versus the original
465 "bare" representation.
467 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
468 Previously the millisecond value corrupted the output.
469 Fix also for syslog_pid=no and log_selector +pid, for which the pid
470 corrupted the output.
476 JH/01 Rework error string handling in TLS interface so that the caller in
477 more cases is responsible for logging. This permits library-sourced
478 string to be attached to addresses during delivery, and collapses
479 pairs of long lines into single ones.
481 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
482 during configuration. Wildcards are allowed and expanded.
484 JH/02 Rework error string handling in DKIM to pass more info back to callers.
485 This permits better logging.
487 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
488 do not close it down and have the child transport start it up again on
489 the passed-on TCP connection. Instead, proxy the child (and any
490 subsequent ones) for TLS via a unix-domain socket channel. Logging is
491 affected: the continued delivery log lines do not have any DNSSEC, TLS
492 Certificate or OCSP information. TLS cipher information is still logged.
494 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
495 identical IP addresses on different listening ports. Will also affect
498 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
499 add noisy ifdef guards to special-case this sillyness.
500 Patch from Bernd Kuhls.
502 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
503 than 255 are no longer allowed.
505 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
506 Disable the session-cache too, which might reduce our load. Since we
507 currrectly use a new context for every connection, both as server and
508 client, there is no benefit for these.
509 GnuTLS appears to not support tickets server-side by default (we don't
510 call gnutls_session_ticket_enable_server()) but client side is enabled
511 by default on recent versions (3.1.3 +) unless the PFS priority string
514 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
515 <https://reproducible-builds.org/specs/source-date-epoch/>.
517 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
518 the check for any unsuccessful recipients did not notice the limit, and
519 erroneously found still-pending ones.
521 JH/08 Pipeline CHUNKING command and data together, on kernels that support
522 MSG_MORE. Only in-clear (not on TLS connections).
524 JH/09 Avoid using a temporary file during transport using dkim. Unless a
525 transport-filter is involved we can buffer the headers in memory for
526 creating the signature, and read the spool data file once for the
527 signature and again for transmission.
529 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
530 4.77 as the kernel support then wasn't solid, having issues in 64bit
531 mode. Now, it's been long enough. Add support for FreeBSD also.
533 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
534 case where the routing stage had gathered several addresses to send to
535 a host before calling the transport for the first, we previously failed
536 to close down TLS in the old transport process before passing the TCP
537 connection to the new process. The new one sent a STARTTLS command
538 which naturally failed, giving a failed delivery and bloating the retry
539 database. Investigation and fix prototype from Wolfgang Breyha.
541 JH/12 Fix check on SMTP command input synchronisation. Previously there were
542 false-negatives in the check that the sender had not preempted a response
543 or prompt from Exim (running as a server), due to that code's lack of
544 awareness of the SMTP input buffering.
546 PP/04 Add commandline_checks_require_admin option.
547 Exim drops privileges sanely, various checks such as -be aren't a
548 security problem, as long as you trust local users with access to their
549 own account. When invoked by services which pass untrusted data to
550 Exim, this might be an issue. Set this option in main configuration
551 AND make fixes to the calling application, such as using `--` to stop
554 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
555 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
556 responses to those, into a single TLS record each way (this usually means
557 a single packet). As a side issue, smtp_enforce_sync now works on TLS
560 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
561 affects you only if you're dancing at the edge of the param size limits.
562 If you are, and this message makes sense to you, then: raise the
563 configured limit or use OpenSSL 1.1. Nothing we can do for older
566 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
567 cmdline element to get the documented default one. Previously it was
570 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
571 are unsuable for non-message-specific reasons - eg. connection timeout,
572 banner-time rejection.
574 JH/16 Fix logging of delivery remote port, when specified by router, under
577 PP/06 Repair manualroute's ability to take options in any order, even if one
578 is the name of a transport.
581 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
583 JH/17 Change the list-building routines interface to use the expanding-string
584 triplet model, for better allocation and copying behaviour.
586 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
587 Previously it was constructed the first time a possibly-matching string
588 was met in the configuration file input during startup; now it is done
591 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
592 compatible one, to avoid the (poorly documented) possibility of a config
593 file in the working directory redirecting the DB files, possibly correpting
594 some existing file. CVE-2017-10140 assigned for BDB.
596 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
597 cache-hot. Previously, although the result was properly cached, the
598 initial verify call returned a defer.
600 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
601 the main verify for receipient in uncached-mode.
603 JH/22 Retire historical build files to an "unsupported" subdir. These are
604 defined as "ones for which we have no current evidence of testing".
606 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
607 if present. Previously it was ignored.
609 JH/24 Start using specified-initialisers in C structure init coding. This is
610 a C99 feature (it's 2017, so now considered safe).
612 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
613 if was a fixed-sized field and bitmask ops via macros; it is now more
616 PP/07 GitHub PR 56: Apply MariaDB build fix.
617 Patch provided by Jaroslav Škarvada.
619 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
620 during Coverity cleanups [4.87 JH/47]
621 Diagnosis and fix provided by Michael Fischer v. Mollard.
623 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
624 the right size to place the terminating semicolon on its own folded
625 line, the header hash was calculated to an incorrect value thanks to
626 the (relaxed) space the fold became.
628 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
629 and confused the parent.
631 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
632 which could crash as a result. This could lead to undeliverable messages.
634 JH/28 Logging: "next input sent too soon" now shows where input was truncated
637 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
638 matters on fast-turnover and PID-randomising systems, which were getting
639 out-of-order delivery.
641 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
642 a possibly-overlapping copy. The symptom was that "Remote host closed
643 connection in response to HELO" was logged instead of the actual 4xx
646 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
647 Previously only that bufferd was discarded, resulting in SYMTP command
650 JH/32 DKIM: when a message has multiple signatures matching an identity given
651 in dkim_verify_signers, run the dkim acl once for each. Previously only
652 one run was done. Bug 2189.
654 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
655 "panic the current process" to "deliberately defer". The panic log is
656 still written with the problem list name; the mail and reject logs now
657 get a temp-reject line for the message that was being handled, saying
658 something like "domains check lookup or other defer". The SMTP 451
659 message is still "Temporary local problem".
661 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
662 A crafted sequence of BDAT commands could result in in-use memory beeing
663 freed. CVE-2017-16943.
665 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
666 from SMTP input. Previously it was always done; now only done for DATA
667 and not BDAT commands. CVE-2017-16944.
669 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
670 to the message (such as an overlong header line). Previously this was
671 not done and we did not exit BDAT mode. Followon from the previous item
672 though a different problem.
678 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
679 than -2003 did; needs libidn2 in addition to libidn.
681 JH/02 The path option on a pipe transport is now expanded before use.
683 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
684 Patch provided by "Björn", documentation fix added too.
686 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
687 missing a wire-to-host endian conversion.
689 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
690 close after a BDAT command line could be taken as a following command,
691 giving a synch failure. Fix by only checking for synch immediately
692 before acknowledging the chunk.
694 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
695 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
696 macro. Patches provided by Josh Soref.
698 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
699 Previously we did not; the RFC seems ambiguous and VRFY is not listed
700 by IANA as a service extension. However, John Klensin suggests that we
703 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
704 the dkim code may be unix-mode line endings rather than smtp wire-format
705 CRLF, so prepend a CR to any bare LF.
707 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
708 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
710 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
711 the first were themselves being wrongly included in the feed into dkim
712 processing; with most chunk sizes in use this resulted in an incorrect
713 body hash calculated value.
715 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
716 DKIM signature block, for verification. Although advised against by
717 standards it is specifically not ruled illegal.
719 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
721 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
722 missing a body hash (the bh= tag).
724 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
725 It seems that HAProxy sends the Proxy Protocol information in clear and
726 only then does a TLS startup, so do the same.
728 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
729 TCP connections (such as for Spamd) unless the daemon successfully set
730 Fast Open mode on its listening sockets. This fixes breakage seen on
731 too-old kernels or those not configured for Fast Open, at the cost of
732 requiring both directions being enabled for TFO, and TFO never being used
733 by non-daemon-related Exim processes.
735 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
736 endings, at least on the first header line. Try to canonify any that get
737 past that check, despite the cost.
739 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
740 now limited to an arbitrary five deep, while parsing addresses with the
741 strip_excess_angle_brackets option enabled.
743 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
744 instead leave the unprompted TLS handshake in socket buffer for the
745 TLS library to consume.
747 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
749 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
751 JH/16 Drop variables when they go out of scope. Memory management drops a whole
752 region in one operation, for speed, and this leaves assigned pointers
753 dangling. Add checks run only under the testsuite which checks all
754 variables at a store-reset and panics on a dangling pointer; add code
755 explicitly nulling out all the variables discovered. Fixes one known
756 bug: a transport crash, where a dangling pointer for $sending_ip_address
757 originally assigned in a verify callout, is re-used.
759 PP/06 Drop '.' from @INC in various Perl scripts.
761 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
763 PP/08 Reduce a number of compilation warnings under clang; building with
764 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
765 should be warning-free.
767 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
769 HS/01 Fix portability problems introduced by PP/08 for platforms where
770 realloc(NULL) is not equivalent to malloc() [SunOS et al].
772 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
773 chunk. This allows us to accept broken chunked messages. We need a more
774 general solution here.
776 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
777 already-broken messages in the queue.
779 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
781 JH/19 Fix reference counting bug in routing-generated-address tracking.
787 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
788 supports it and a size is available (ie. the sending peer gave us one).
790 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
791 years of being deprecated). The replacements are the ACLs
792 acl_smtp_mime and acl_not_smtp_mime.
794 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
795 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
796 or even an in-clear connection were permitted. Now, if the host lookup
797 was dnssec and dane was requested then the host is only used if the
798 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
799 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
800 if one fails this test.
801 This means that a poorly-configured remote DNS will make it incommunicado;
802 but it protects against a DNS-interception attack on it.
804 JH/04 Bug 1810: make continued-use of an open smtp transport connection
805 non-noisy when a race steals the message being considered.
807 JH/05 If main configuration option tls_certificate is unset, generate a
808 self-signed certificate for inbound TLS connections.
810 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
811 in rewrites and routers.
813 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
814 and logged a warning sing 4.83; now they are a configuration file error.
816 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
817 (lacking @domain). Apply the same qualification processing as RCPT.
819 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
821 JH/10 Support ${sha256:} applied to a string (as well as the previous
824 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
825 a cutthrough deliver is pending, as we always want to make a connection.
826 This also avoids re-routing the message when later placing the cutthrough
827 connection after a verify cache hit.
828 Do not update it with the verify result either.
830 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
831 when routing results in more than one destination address.
833 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
834 signing (which inhibits the cutthrough capability). Previously only
835 the presence of an option was tested; now an expansion evaluating as
836 empty is permissible (obviously it should depend only on data available
837 when the cutthrough connection is made).
839 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
840 the relevant preceding SMTP command did not note the pipelining mode.
842 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
843 Previously they were not counted.
845 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
846 as one having no matching records. Previously we deferred the message
847 that needed the lookup.
849 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
850 distinguished as "(=".
852 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
853 for missing MX records. Previously it only worked for missing A records.
855 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
857 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
858 after the data-go-ahead and data-ack. Patch from Jason Betts.
860 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
861 even for a "none" policy. Patch from Tony Meyer.
863 JH/22 Fix continued use of a connection for further deliveries. If a port was
864 specified by a router, it must also match for the delivery to be
867 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
868 When one of the recipients of a message was unsuitable for the connection
869 (has no matching addresses), we lost track of needing to mark it
870 deferred. As a result mail would be lost.
872 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
874 JH/25 Decoding ACL controls is now done using a binary search; the source code
875 takes up less space and should be simpler to maintain. Merge the ACL
876 condition decode tables also, with similar effect.
878 JH/26 Fix problem with one_time used on a redirect router which returned the
879 parent address unchanged. A retry would see the parent address marked as
880 delivered, so not attempt the (identical) child. As a result mail would
883 JH/27 Fix a possible security hole, wherein a process operating with the Exim
884 UID can gain a root shell. Credit to http://www.halfdog.net/ for
885 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
888 JH/28 Enable {spool,log} filesystem space and inode checks as default.
889 Main config options check_{log,spool}_{inodes,space} are now
890 100 inodes, 10MB unless set otherwise in the configuration.
892 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
893 Previously it only applied to the main-section connection policy
896 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
898 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
899 by me. Added RFC7919 DH primes as an alternative.
901 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
902 are not in the system include path.
904 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
905 GnuTLS, when a session startup failed (eg because the client disconnected)
906 Exim did stdio operations after fclose. This was exposed by a recent
907 change which nulled out the file handle after the fclose.
909 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
910 signed directly by the cert-signing cert, rather than an intermediate
911 OCSP-signing cert. This is the model used by LetsEncrypt.
913 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
915 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
916 an incoming connection.
918 HS/02 Bug 1802: Do not half-close the connection after sending a request
921 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
922 fallback to "prime256v1".
924 JH/34 SECURITY: Use proper copy of DATA command in error message.
925 Could leak key material. Remotely exploitable. CVE-2016-9963.
931 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
932 and 3.4.4 - once the server is enabled to respond to an OCSP request
933 it does even when not requested, resulting in a stapling non-aware
934 client dropping the TLS connection.
936 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
937 support variable-length bit vectors. No functional change.
939 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
940 The I= interface field on outgoing lines is now after the H= remote
941 host field, same as incoming lines. There is a separate
942 outgoing_interface log selector which allows you to disable the
945 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
946 If not running log_selector +smtp_connection the mainlog would be held
947 open indefinitely after a "too many connections" event, including to a
948 deleted file after a log rotate. Leave the per net connection logging
949 leaving it open for efficiency as that will be quickly detected by the
950 check on the next write.
952 HS/01 Bug 1671: Fix post transport crash.
953 Processing the wait-<transport> messages could crash the delivery
954 process if the message IDs didn't exist for some reason. When
955 using 'split_spool_directory=yes' the construction of the spool
956 file name failed already, exposing the same netto behaviour.
958 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
959 mime_regex ACL conditions.
961 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
962 to DSN fail messages (bounces): remote IP, remote greeting, remote response
963 to HELO, local diagnostic string.
965 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
966 log line to debug. Even when configured with a tls authenticator many
967 client connections are expected to not authenticate in this way, so
968 an authenticate fail is not an error.
970 HS/02 Add the Exim version string to the process info. This way exiwhat
971 gives some more detail about the running daemon.
973 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
974 matter for fast-change records such as DNSBLs.
976 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
977 retry record, even if constant. There may be multiple transports with
978 different interface settings and the retry behaviour needs to be kept
981 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
983 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
985 JH/10 Bug 840: fix log_defer_output option of pipe transport
987 JH/11 Bug 830: use same host for all RCPTS of a message, even under
988 hosts_randomize. This matters a lot when combined with mua_wrapper.
990 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
991 ${quote_pgsql:<string>} operator.
993 JH/13 Bug 1708: avoid misaligned access in cached lookup.
995 JH/14 Change header file name for freeradius-client. Relevant if compiling
996 with Radius support; from the Gentoo tree and checked under Fedora.
998 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1000 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1001 option transport_filter, meaning no filtering.
1003 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1005 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1006 defaults to "*" (all hosts). The variable is now available when not built
1007 with TLS, default unset, mainly to enable keeping the testsuite sane.
1008 If a server certificate is not supplied (via tls_certificate) an error is
1009 logged, and clients will find TLS connections fail on startup. Presumably
1010 they will retry in-clear.
1011 Packagers of Exim are strongly encouraged to create a server certificate
1012 at installation time.
1014 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1015 with the $config_file variable.
1017 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1018 in transport context, after the attempt, and per-recipient. The latter type
1019 is per host attempted. The event data is the error message, and the errno
1020 information encodes the lookup type (A vs. MX) used for the (first) host,
1021 and the trailing two digits of the smtp 4xx response.
1023 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1024 to write to mainlog (or rejectlog, paniclog) in the window between file
1025 creation and permissions/ownership being changed. Particularly affects
1026 installations where exicyclog is run as root, rather than exim user;
1027 result is that the running daemon panics and dies.
1029 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1031 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1032 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1033 "pri" and "weight". Note that the previous implicit priority given by the
1034 list order is no longer honoured.
1036 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1037 for DKIM processing.
1039 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1040 by defining SUPPORT_SOCKS.
1042 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1043 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1044 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1045 variables are renamed to proxy_{local,external}_{address,port}.
1047 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1048 for a build by defining SUPPORT_I18N
1050 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1051 of the query string, and make ${quote_redis:} do that quoting.
1053 JH/29 Move Events support from Experimental to mainline, enabled by default
1054 and removable for a build by defining DISABLE_EVENT.
1056 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1058 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1059 cached by the daemon.
1061 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1062 by defining LOOKUP_REDIS. The libhiredis library is required.
1064 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1065 keys are given for lookup.
1067 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1068 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1069 only supported when built with TLS support. The PolarSSL SHA routines
1070 are still used when the TLS library is too old for convenient support.
1072 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1073 openssl_options), for security. OpenSSL forces this from version 1.1.0
1074 server-side so match that on older versions.
1076 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1077 allocation for $value could be released as the expansion processing
1078 concluded, but leaving the global pointer active for it.
1080 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1081 and to use the domains and local_parts ACL conditions.
1083 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1084 incorrectly not doubled on cutthrough transmission, hence seen as a
1085 body-termination at the receiving system - resulting in truncated mails.
1086 Commonly the sender saw a TCP-level error, and retransmitted the message
1087 via the normal store-and-forward channel. This could result in duplicates
1088 received - but deduplicating mailstores were liable to retain only the
1089 initial truncated version.
1091 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1093 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1095 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1096 we're in there, support oversigning also; bug 1309.
1098 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1100 HS/04 Add support for keep_environment and add_environment options.
1102 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1103 either intentional arithmetic overflow during PRNG, or testing config-
1106 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1107 delivery resulted in actual delivery. Cancel cutthrough before DATA
1110 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1111 rejects a recipient: pass the reject to the originator.
1113 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1114 Many were false-positives and ignorable, but it's worth fixing the
1117 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1118 for the new environment-manipulation done at startup. Move the routines
1119 from being local to tls.c to being global via the os.c file.
1121 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1122 an extract embedded as result-arg for a map, the first arg for extract
1123 is unavailable so we cannot tell if this is a numbered or keyed
1124 extraction. Accept either.
1130 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1133 JH/02 The smtp transport option "multi_domain" is now expanded.
1135 JH/03 The smtp transport now requests PRDR by default, if the server offers
1138 JH/04 Certificate name checking on server certificates, when exim is a client,
1139 is now done by default. The transport option tls_verify_cert_hostnames
1140 can be used to disable this per-host. The build option
1141 EXPERIMENTAL_CERTNAMES is withdrawn.
1143 JH/05 The value of the tls_verify_certificates smtp transport and main options
1144 default to the word "system" to access the system default CA bundle.
1145 For GnuTLS, only version 3.0.20 or later.
1147 JH/06 Verification of the server certificate for a TLS connection is now tried
1148 (but not required) by default. The verification status is now logged by
1149 default, for both outbound TLS and client-certificate supplying inbound
1152 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1155 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1156 Status Notification (bounce) messages are now MIME format per RFC 3464.
1157 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1158 under the control of the dsn_advertise_hosts option, and routers may
1159 have a dsn_lasthop option.
1161 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1162 default, modifiable by a malware= option. The list separator for
1163 the options can now be changed in the usual way. Bug 68.
1165 JH/10 The smtp_receive_timeout main option is now expanded before use.
1167 JH/11 The incoming_interface log option now also enables logging of the
1168 local interface on delivery outgoing connections.
1170 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1171 if the interface and destination host and port all match.
1173 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1176 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1177 Patch from Andrew Lewis.
1179 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1180 now supports optional time-restrictions, weighting, and priority
1181 modifiers per server. Patch originally by <rommer@active.by>.
1183 JH/16 The spamd_address main option now supports a mixed list of local
1184 and remote servers. Remote servers can be IPv6 addresses, and
1185 specify a port-range.
1187 JH/17 Bug 68: The spamd_address main option now supports an optional
1188 timeout value per server.
1190 JH/18 Bug 1581: Router and transport options headers_add/remove can
1191 now have the list separator specified.
1193 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1196 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1199 JH/21 Support for the A6 type of dns record is withdrawn.
1201 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1202 rather than the verbs used.
1204 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1205 from 255 to 1024 chars.
1207 JH/24 Verification callouts now attempt to use TLS by default.
1209 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1210 are generic router options now. The defaults didn't change.
1212 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1213 Original patch from Alexander Shikoff, worked over by JH.
1215 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1216 files if ZCAT_COMMAND is not executable.
1218 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1220 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1222 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1223 Normally benign, it bites when the pair was led to by a CNAME;
1224 modern usage is to not canonicalize the domain to a CNAME target
1225 (and we were inconsistent anyway for A-only vs AAAA+A).
1227 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1229 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1230 when evaluating $sender_host_dnssec.
1232 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1233 $sender_helo_dnssec variable.
1235 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1237 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1239 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1241 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1242 documented as working, but never had. Support all but $spam_report.
1244 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1245 added for tls authenticator.
1247 HS/03 Add perl_taintmode main config option
1253 TL/01 When running the test suite, the README says that variables such as
1254 no_msglog_check are global and can be placed anywhere in a specific
1255 test's script, however it was observed that placement needed to be near
1256 the beginning for it to behave that way. Changed the runtest perl
1257 script to read through the entire script once to detect and set these
1258 variables, reset to the beginning of the script, and then run through
1259 the script parsing/test process like normal.
1261 TL/02 The BSD's have an arc4random API. One of the functions to induce
1262 adding randomness was arc4random_stir(), but it has been removed in
1263 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1264 function when detected.
1266 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1267 cause callback expansion.
1269 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1270 syntax errors in an expansion can be treated as a string instead of
1271 logging or causing an error, due to the internal use of bool_lax
1272 instead of bool when processing it.
1274 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1275 server certificates when making smtp deliveries.
1277 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1279 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1281 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1283 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1284 Merged patch from Sebastian Wiedenroth.
1286 JH/05 Fix results-pipe from transport process. Several recipients, combined
1287 with certificate use, exposed issues where response data items split
1288 over buffer boundaries were not parsed properly. This eventually
1289 resulted in duplicates being sent. This issue only became common enough
1290 to notice due to the introduction of connection certificate information,
1291 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1293 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1294 size buffer was used, resulting in syntax errors when an expansion
1297 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1298 version 3.3.6 or later.
1300 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1301 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1302 both become "event_action", the variables become $event_name, $event_data
1303 and $event_defer_errno. There is a new variable $verify_mode, usable in
1304 routers, transports and related events. The tls:cert event is now also
1305 raised for inbound connections, if the main configuration event_action
1308 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1309 early OCSP support, but no stapling (appears to be less than 1.0.0).
1311 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1312 server certificate names available under the smtp transport option
1313 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1316 JH/10 Time-related extraction expansions from certificates now use the main
1317 option "timezone" setting for output formatting, and are consistent
1318 between OpenSSL and GnuTLS compilations. Bug 1541.
1320 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1321 encoded parameter in the incoming message. Bug 1558.
1323 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1324 include certificate info, eximon was claiming there were spoolfile
1327 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1329 JH/14 Log delivery-related information more consistently, using the sequence
1330 "H=<name> [<ip>]" wherever possible.
1332 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1333 are problematic for Debian distribution, omit them from the release
1336 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1338 JH/16 Fix string representation of time values on 64bit time_t architectures.
1341 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1342 output list separator was used.
1347 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1348 checkers that were complaining about end of non-void function with no
1351 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1352 This was a regression introduced in 4.83 by another bugfix.
1354 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1356 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1357 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1363 TF/01 Correctly close the server side of TLS when forking for delivery.
1365 When a message was received over SMTP with TLS, Exim failed to clear up
1366 the incoming connection properly after forking off the child process to
1367 deliver the message. In some situations the subsequent outgoing
1368 delivery connection happened to have the same fd number as the incoming
1369 connection previously had. Exim would try to use TLS and fail, logging
1370 a "Bad file descriptor" error.
1372 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1373 utilities have not been installed.
1375 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1376 temporary space as the ACL may create new global variables.
1378 TL/01 LDAP support uses per connection or global context settings, depending
1379 upon the detected version of the libraries at build time.
1381 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1382 to extract and use the src ip:port in logging and expansions as if it
1383 were a direct connection from the outside internet. PPv2 support was
1384 updated based on HAProxy spec change in May 2014.
1386 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1388 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1389 Properly escape header and check for NULL return.
1391 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1394 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1396 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1397 characters in header names, implemented as a verify condition.
1398 Contributed by Michael Fischer v. Mollard.
1400 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1401 results permerror and temperror. Previous values are deprecated but
1402 still accepted. In a future release, err_perm and err_temp will be
1403 completely removed, which will be a backward incompatibility if the
1404 ACL tests for either of these two old results. Patch contributed by
1405 user bes-internal on the mailing list.
1407 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1409 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1410 selectors, in both main and reject logs.
1412 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1415 JH/07 Add malware type "sock" for talking to simple daemon.
1417 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1419 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1420 routers/transports under cutthrough routing.
1422 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1423 numbers. Touch up "bool" conditional to keep the same definition.
1425 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1427 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1429 JH/12 Expand items in router/transport headers_add or headers_remove lists
1430 individually rather than the list as a whole. Bug 1452.
1432 Required for reasonable handling of multiple headers_ options when
1433 they may be empty; requires that headers_remove items with embedded
1434 colons must have them doubled (or the list-separator changed).
1436 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1437 view the policy declared in the DMARC record. Currently, $dmarc_status
1438 is a combined value of both the record presence and the result of the
1441 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1443 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1444 dnslookup router and the smtp transport (applying to the forward
1447 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1448 of ldap servers used for a specific lookup. Patch provided by Heiko
1451 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1452 New variable $lookup_dnssec_authenticated for observability.
1454 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1455 Patch submitted by Lars Timman.
1457 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1459 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1460 Requires trusted mode and valid format message id, aborts otherwise.
1461 Patch contributed by Heiko Schlichting.
1463 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1464 certextract with support for various fields. Bug 1358.
1466 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1467 is requested by default, modifiable by smtp transport option
1470 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1471 operate on certificate variables to give certificate fingerprints
1472 Also new ${sha256:cert_variable}.
1474 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1476 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1477 Christian Aistleitner.
1479 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1481 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1482 file. Patch from Wolfgang Breyha.
1484 JH/25 Expand the coverage of the delivery $host and $host_address to
1485 client authenticators run in verify callout. Bug 1476.
1487 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1488 align with daemon_smtp_ports. Bug 72.
1490 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1491 support and error reporting did not work properly.
1493 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1494 and is readable. Patch from Andrew Colin Kissa.
1496 TL/14 Enhance documentation of ${run expansion and how it parses the
1497 commandline after expansion, particularly in the case when an
1498 unquoted variable expansion results in an empty value.
1500 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1502 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1503 by renaming away from it. Addresses GH issue 15, reported by
1506 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1508 TL/15 SECURITY: prevent double expansion in math comparison functions
1509 (can expand unsanitized data). Not remotely exploitable.
1516 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1518 PP/02 Make -n do something, by making it not do something.
1519 When combined with -bP, the name of an option is not output.
1521 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1524 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1525 $sender_host_name and config options to manage this, and basic check
1528 PP/05 DSCP support for outbound connections and control modifier for inbound.
1530 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1531 (Only plugin which currently uses this is kerberos4, which nobody should
1532 be using, but we should make it available and other future plugins might
1533 conceivably use it, even though it would break NAT; stuff *should* be
1534 using channel bindings instead).
1536 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1537 name; added for Sendmail compatibility; requires admin caller.
1538 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1539 just ignore it); requires trusted caller.
1540 Also parse but ignore: -Ac -Am -X<logfile>
1543 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1545 TL/02 Add +smtp_confirmation as a default logging option.
1547 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1548 Patch by Magnus Holmgren from 2007-02-20.
1550 TL/04 Bugzilla 1281 - Spec typo.
1551 Bugzilla 1283 - Spec typo.
1552 Bugzilla 1290 - Spec grammar fixes.
1554 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1556 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1558 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1559 mailing list by by Dmitry Isaikin.
1561 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1563 JH/02 Support "G" suffix to numbers in ${if comparisons.
1565 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1567 NM/01 Bugzilla 1197 - Spec typo
1568 Bugzilla 1196 - Spec examples corrections
1570 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1572 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1573 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1576 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1577 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1579 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1580 "acl {{name}{arg}...}", and optional args on acl condition
1583 JH/05 Permit multiple router/transport headers_add/remove lines.
1585 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1587 JH/07 Avoid using a waiting database for a single-message-only transport.
1588 Performance patch from Paul Fisher. Bugzilla 1262.
1590 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1593 JH/09 Add $headers_added variable, with content from use of ACL modifier
1594 add_header (but not yet added to the message). Bugzilla 199.
1596 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1597 Pulled from Bugzilla 817 by Wolfgang Breyha.
1599 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1601 (nb: this is the same fix as in Exim 4.80.1)
1603 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1606 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1609 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1611 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1612 advertise SMTP AUTH mechanism to us, instead of a generic
1613 protocol violation error. Also, make Exim more robust to bad
1614 data from the Dovecot auth socket.
1616 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1618 When a queue runner is handling a message, Exim first routes the
1619 recipient addresses, during which it prunes them based on the retry
1620 hints database. After that it attempts to deliver the message to
1621 any remaining recipients. It then updates the hints database using
1624 So if a recipient address works intermittently, it can get repeatedly
1625 deferred at routing time. The retry hints record remains fresh so the
1626 address never reaches the final cutoff time.
1628 This is a fairly common occurrence when a user is bumping up against
1629 their storage quota. Exim had some logic in its local delivery code
1630 to deal with this. However it did not apply to per-recipient defers
1631 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1633 This change adds a proper retry rule check during routing so that the
1634 final cutoff time is checked against the message's age. We only do
1635 this check if there is an address retry record and there is not a
1636 domain retry record; this implies that previous attempts to handle
1637 the address had the retry_use_local_parts option turned on. We use
1638 this as an approximation for the destination being like a local
1639 delivery, as in LMTP.
1641 I suspect this new check makes the old local delivery cutoff check
1642 redundant, but I have not verified this so I left the code in place.
1644 TF/02 Correct gecos expansion when From: is a prefix of the username.
1646 Test 0254 submits a message to Exim with the header
1650 When I ran the test suite under the user fanf2, Exim expanded
1651 the header to contain my full name, whereas it should have added
1652 a Resent-Sender: header. It erroneously treats any prefix of the
1653 username as equal to the username.
1655 This change corrects that bug.
1657 GF/01 DCC debug and logging tidyup
1658 Error conditions log to paniclog rather than rejectlog.
1659 Debug lines prefixed by "DCC: " to remove any ambiguity.
1661 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1663 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1664 Bug spotted by Jeremy Harris; was flawed since initial commit.
1665 Would have resulted in OCSP responses post-SNI triggering an Exim
1666 NULL dereference and crash.
1668 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1670 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1671 Bug detection, analysis and fix by Samuel Thibault.
1672 Bugzilla 1331, Debian bug #698092.
1674 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1676 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1677 Server implementation by Todd Lyons, client by JH.
1678 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1679 config variable "prdr_enable" controls whether the server
1680 advertises the facility. If the client requests PRDR a new
1681 acl_data_smtp_prdr ACL is called once for each recipient, after
1682 the body content is received and before the acl_smtp_data ACL.
1683 The client is controlled by both of: a hosts_try_prdr option
1684 on the smtp transport, and the server advertisement.
1685 Default client logging of deliveries and rejections involving
1686 PRDR are flagged with the string "PRDR".
1688 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1689 fclose(). Diagnosis by Todd Lyons.
1691 PP/17 Update configure.default to handle IPv6 localhost better.
1692 Patch by Alain Williams (plus minor tweaks).
1695 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1696 This is now consistent with GnuTLS, and is now documented: the
1697 previous undocumented portable approach to treating the option as
1698 unset was to force an expansion failure. That still works, and
1699 an empty string is now equivalent.
1701 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1702 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1703 not performing validation itself.
1705 PP/20 Added force_command boolean option to pipe transport.
1706 Patch from Nick Koston, of cPanel Inc.
1708 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1711 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1713 PP/21 Fix eximon continuous updating with timestamped log-files.
1714 Broken in a format-string cleanup in 4.80, missed when I repaired the
1715 other false fix of the same issue.
1716 Report and fix from Heiko Schlichting.
1719 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1720 Report from Prashanth Katuri.
1722 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1723 It's SecureTransport, so affects any MacOS clients which use the
1724 system-integrated TLS libraries, including email clients.
1726 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1727 using a MIME ACL for non-SMTP local injection.
1728 Report and assistance in diagnosis by Warren Baker.
1730 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1732 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1734 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1735 last id that failed so it may be referenced in subsequent ACL's.
1737 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1740 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1741 ldap library initialization, allowing self-signed CA's to be
1742 used. Also properly sets require_cert option later in code by
1743 using NULL (global ldap config) instead of ldap handle (per
1744 session). Bug diagnosis and testing by alxgomz.
1746 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1747 the src/util/ subdirectory.
1749 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1750 renamed to Transport Post Delivery Action by Jeremy Harris, as
1753 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1754 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1755 redis_servers = needs to be configured which will be used by the redis
1756 lookup. Patch from Warren Baker, of The Packet Hub.
1758 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1760 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1761 hostname or reverse DNS when processing a host list. Used suggestions
1762 from multiple comments on this bug.
1764 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1766 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1767 Missed a few lines, added it to make the runtest require no keyboard
1770 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1771 contains upper case chars. Make router use caseful_local_part.
1773 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1774 support when GnuTLS has been built with p11-kit.
1780 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1782 This, or similar/improved, will also be change PP/11 of 4.82.
1788 PP/01 Handle short writes when writing local log-files.
1789 In practice, only affects FreeBSD (8 onwards).
1790 Bugzilla 1053, with thanks to Dmitry Isaikin.
1792 NM/01 Bugzilla 949 - Documentation tweak
1794 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1797 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1799 PP/02 Implemented gsasl authenticator.
1801 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1803 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1804 `pkg-config foo` for cflags/libs.
1806 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1807 with rest of GSASL and with heimdal_gssapi.
1809 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1810 `pkg-config foo` for cflags/libs for the TLS implementation.
1812 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1813 properties get this fed in as external SSF. A number of robustness
1814 and debugging improvements to the cyrus_sasl authenticator.
1816 PP/08 cyrus_sasl server now expands the server_realm option.
1818 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1819 Patch by Jeremy Harris.
1821 PP/10 Added dbmjz lookup type.
1823 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1825 PP/12 MAIL args handles TAB as well as SP, for better interop with
1826 non-compliant senders.
1827 Analysis and variant patch by Todd Lyons.
1829 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1830 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1831 Patch from Dirk Mueller <dmueller@suse.com>
1833 PP/13 tls_peerdn now print-escaped for spool files.
1834 Observed some $tls_peerdn in wild which contained \n, which resulted
1835 in spool file corruption.
1837 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1838 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1839 or write after TLS renegotiation, which otherwise led to messages
1842 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1843 as a tracking header (ie: a signed header comes before the signature).
1844 Patch from Wolfgang Breyha.
1846 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1847 comma-sep list; embedded commas doubled.
1849 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1851 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1853 Report and patch from Dmitry Banschikov.
1855 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1856 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1857 failures. We appear to now support TLS1.1+ with Exim.
1859 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1860 lets Exim select keys and certificates based upon TLS SNI from client.
1861 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1862 before an outbound SMTP session. New log_selector, +tls_sni.
1864 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1865 NULL dereference. Report and patch from Alun Jones.
1867 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1868 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1869 Not seeing resolver debug output on NetBSD, but suspect this is a
1870 resolver implementation change.
1872 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1873 Left warnings. Added "eximon gdb" invocation mode.
1875 PP/21 Defaulting "accept_8bitmime" to true, not false.
1877 PP/22 Added -bw for inetd wait mode support.
1879 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1880 locate the relevant includes and libraries. Made this the default.
1882 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1883 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1885 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1886 This may cause build issues on older platforms.
1888 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1889 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1890 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1891 Added SNI support via GnuTLS too.
1892 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1894 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1896 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1897 Applied second patch from Janne, implementing suggestion to default
1898 multiple-strings-in-record handling to match SPF spec.
1900 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1902 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1903 read-only, out of scope).
1904 Patch from Wolfgang Breyha, report from Stuart Northfield.
1906 PP/29 Fix three issues highlighted by clang analyser static analysis.
1907 Only crash-plausible issue would require the Cambridge-specific
1908 iplookup router and a misconfiguration.
1909 Report from Marcin Mirosław.
1911 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1913 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1914 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1915 As part of this, removing so much warning spew let me fix some minor
1916 real issues in debug logging.
1918 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1919 assignment on my part. Fixed.
1921 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1922 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1923 Janne Snabb (who went above and beyond: thank you).
1925 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1926 string otherwise requires a connection and a bunch more work and it's
1927 relatively easy to get wrong. Should also expose TLS library linkage
1930 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1931 64-bit ${eval} (JH/03).
1933 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1934 GNU libc to support some of the 64-bit stuff, should not lead to
1935 conflicts. Defined before os.h is pulled in, so if a given platform
1936 needs to override this, it can.
1938 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1939 protection layer was required, which is not implemented.
1940 Bugzilla 1254, patch from Wolfgang Breyha.
1942 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1943 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1944 tls_dhparam take prime identifiers. Also unbreak combination of
1945 OpenSSL+DH_params+TLSSNI.
1947 PP/39 Disable SSLv2 by default in OpenSSL support.
1953 PP/01 Solaris build fix for Oracle's LDAP libraries.
1954 Bugzilla 1109, patch from Stephen Usher.
1956 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1958 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1961 TF/02 Fix a couple more cases where we did not log the error message
1962 when unlink() failed. See also change 4.74-TF/03.
1964 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1965 lock up or crash if it happened to be inside a call to libc when it
1966 got a SIGUSR1 from exiwhat.
1968 The SIGUSR1 handler appends the current process status to the process
1969 log which is later printed by exiwhat. It used to use the general
1970 purpose logging code to do this, but several functions it calls are
1971 not safe for signals.
1973 The new output code in the SIGUSR1 handler is specific to the process
1974 log, and simple enough that it's easy to inspect for signal safety.
1975 Removing some special cases also simplifies the general logging code.
1976 Removing the spurious timestamps from the process log simplifies
1979 TF/04 Improved ratelimit ACL condition.
1981 The /noupdate option has been deprecated in favour of /readonly which
1982 has clearer semantics. The /leaky, /strict, and /readonly update modes
1983 are mutually exclusive. The update mode is no longer included in the
1984 database key; it just determines when the database is updated. (This
1985 means that when you upgrade Exim will forget old rate measurements.)
1987 Exim now checks that the per_* options are used with an update mode that
1988 makes sense for the current ACL. For example, when Exim is processing a
1989 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1990 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1991 must specify per_mail/readonly. If you omit the update mode it defaults to
1992 /leaky where that makes sense (as before) or /readonly where required.
1994 The /noupdate option is now undocumented but still supported for
1995 backwards compatibility. It is equivalent to /readonly except that in
1996 ACLs where /readonly is required you may specify /leaky/noupdate or
1997 /strict/noupdate which are treated the same as /readonly.
1999 A useful new feature is the /count= option. This is a generalization
2000 of the per_byte option, so that you can measure the throughput of other
2001 aggregate values. For example, the per_byte option is now equivalent
2002 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2004 The per_rcpt option has been generalized using the /count= mechanism
2005 (though it's more complicated than the per_byte equivalence). When it is
2006 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2007 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2008 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2009 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2010 Note that using per_rcpt with a non-readonly update mode in more than
2011 one ACL will cause the recipients to be double-counted. (The per_mail
2012 and per_byte options don't have this problem.)
2014 The handling of very low rates has changed slightly. If the computed rate
2015 is less than the event's count (usually one) then this event is the first
2016 after a long gap. In this case the rate is set to the same as this event's
2017 count, so that the first message of a spam run is counted properly.
2019 The major new feature is a mechanism for counting the rate of unique
2020 events. The new per_addr option counts the number of different
2021 recipients that someone has sent messages to in the last time period. It
2022 behaves like per_rcpt if all the recipient addresses are different, but
2023 duplicate recipient addresses do not increase the measured rate. Like
2024 the /count= option this is a general mechanism, so the per_addr option
2025 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2026 example, measure the rate that a client uses different sender addresses
2027 with the options per_mail/unique=$sender_address. There are further
2028 details in the main documentation.
2030 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2032 TF/06 Removed a few PCRE remnants.
2034 TF/07 Automatically extract Exim's version number from tags in the git
2035 repository when doing development or release builds.
2037 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2038 Bugzilla 879. Patch from Paul Fisher.
2040 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2041 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2044 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2046 PP/05 Variable $av_failed, true if the AV scanner deferred.
2047 Bugzilla 1078. Patch from John Horne.
2049 PP/06 Stop make process more reliably on build failure.
2050 Bugzilla 1087. Patch from Heiko Schlittermann.
2052 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2053 Bugzilla 1089. Patch from Heiko Schlittermann.
2055 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2056 Bugzilla 1131. Patch from Holger Weiß.
2058 PP/09 Handle IPv6 addresses with SPF.
2059 Bugzilla 860. Patch from Wolfgang Breyha.
2061 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2063 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2066 PP/11 match_* no longer expand right-hand-side by default.
2067 New compile-time build option, EXPAND_LISTMATCH_RHS.
2068 New expansion conditions, "inlist", "inlisti".
2070 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2072 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2074 PP/14 fix log_write() format string regression from TF/03.
2075 Bugzilla 1152. Patch from Dmitry Isaikin.
2081 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2083 PP/02 Harmonised TLS library version reporting; only show if debugging.
2084 Layout now matches that introduced for other libraries in 4.74 PP/03.
2086 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2088 PP/04 New "dns_use_edns0" global option.
2090 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2093 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2094 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2096 TK/01 Updated PolarSSL code to 0.14.2.
2097 Bugzilla 1097. Patch from Andreas Metzler.
2099 PP/07 Catch divide-by-zero in ${eval:...}.
2100 Fixes bugzilla 1102.
2102 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2105 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2106 format-string attack -- SECURITY: remote arbitrary code execution.
2108 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2109 time unintentionally subject to list matching rules, letting the header
2110 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2111 arbitrary string expansion). This allowed for information disclosure.
2113 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2114 INT_MIN/-1 -- value coerced to INT_MAX.
2120 NM/01 Workaround for PCRE version dependency in version reporting
2123 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2124 This fixes portability to compilers other than gcc, notably
2125 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2127 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2128 makefiles for portability to HP-UX and POSIX correctness.
2130 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2131 Also via indented variable definition in the Makefile.
2132 (Debugging by Oliver Heesakkers).
2134 PP/02 Restore caching of spamd results with expanded spamd_address.
2135 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2137 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2138 Improves build reliability. Fix from: Frank Elsner
2140 NM/02 Fix wide character breakage in the rfc2047 coding
2141 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2143 NM/03 Allow underscore in dnslist lookups
2144 Fixes bug 1026. Patch from Graeme Fowler
2146 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2147 Code patches from Adam Ciarcinski of NetBSD.
2149 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2152 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2153 is logged, to avoid truncation. Patch from John Horne.
2155 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2156 Patch from Jakob Hirsch.
2158 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2159 SQL string expansion failure details.
2160 Patch from Andrey Oktyabrski.
2162 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2163 Patch from Simon Arlott.
2165 PP/09 New lookups functionality failed to compile on old gcc which rejects
2166 extern declarations in function scope.
2167 Patch from Oliver Fleischmann
2169 PP/10 Use sig_atomic_t for flags set from signal handlers.
2170 Check getgroups() return and improve debugging.
2171 Fixed developed for diagnosis in bug 927 (which turned out to be
2174 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2175 Patch from Mark Zealey.
2177 PP/12 Bugzilla 1056: Improved spamd server selection.
2178 Patch from Mark Zealey.
2180 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2181 Based on patch from Heiko Schlittermann.
2183 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2184 Patch from Uwe Doering, sign-off by Michael Haardt.
2186 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2187 variable declaration deep within a block. Bug and patch from
2190 PP/15 lookups-Makefile IRIX compatibility coercion.
2192 PP/16 Make DISABLE_DKIM build knob functional.
2194 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2195 Patch by Simon Arlott
2197 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2198 variable argument macros. Our copy now differs from upstream.
2204 TF/01 Failure to get a lock on a hints database can have serious
2205 consequences so log it to the panic log.
2207 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2208 controlled using the smtp_confirmation log selector.
2210 TF/03 Include the error message when we fail to unlink a spool file.
2212 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2213 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2214 for maintaining out-of-tree patches for some time.
2216 PP/01 Bugzilla 139: Documentation and portability issues.
2217 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2218 Handle per-OS dynamic-module compilation flags.
2220 PP/02 Let /dev/null have normal permissions.
2221 The 4.73 fixes were a little too stringent and complained about the
2222 permissions on /dev/null. Exempt it from some checks.
2223 Reported by Andreas M. Kirchwitz.
2225 PP/03 Report version information for many libraries, including
2226 Exim version information for dynamically loaded libraries. Created
2227 version.h, now support a version extension string for distributors
2228 who patch heavily. Dynamic module ABI change.
2230 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2231 privilege escalation vulnerability whereby the Exim run-time user
2232 can cause root to append content of the attacker's choosing to
2235 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2238 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2239 If dropping privileges for untrusted macros, we disabled normal logging
2240 on the basis that it would fail; for the Exim run-time user, this is not
2241 the case, and it resulted in successful deliveries going unlogged.
2242 Fixed. Reported by Andreas Metzler.
2248 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2249 only prepend for the Resent-* case. Fixes regression introduced in
2250 Exim 4.70 by NM/22 for Bugzilla 607.
2252 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2253 increasing numbers of administrators be bitten by this.
2255 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2257 PP/03 Bugzilla 994: added openssl_options main configuration option.
2259 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2261 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2263 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2265 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2266 without a peer certificate, leading to a segfault because of an
2267 assumption that peers always have certificates. Be a little more
2268 paranoid. Problem reported by Martin Tscholak.
2270 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2271 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2272 NB: ClamAV planning to remove STREAM in "middle of 2010".
2273 CL also introduces -bmalware, various -d+acl logging additions and
2274 more caution in buffer sizes.
2276 PP/09 Implemented reverse_ip expansion operator.
2278 PP/10 Bugzilla 937: provide a "debug" ACL control.
2280 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2282 PP/12 Bugzilla 973: Implement --version.
2284 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2286 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2288 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2290 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2291 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2292 ignore trailing whitespace.
2294 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2296 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2299 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2300 Notification from Dr Andrew Aitchison.
2302 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2303 ExtendedDetectionInfo response format.
2304 Notification from John Horne.
2306 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2309 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2310 XSL and documented dependency on system catalogs, with examples of how
2313 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2316 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2317 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2318 configuration file which is writeable by the Exim user or group.
2320 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2321 of configuration files to cover files specified with the -C option if
2322 they are going to be used with root privileges, not just the default
2325 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2326 option (effectively making it always true).
2328 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2329 files to be used while preserving root privileges.
2331 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2332 that rogue child processes cannot use them.
2334 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2335 run-time user, instead of root.
2337 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2338 Exim run-time user without dropping privileges.
2340 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2341 result string, instead of calling string_vformat() twice with the same
2344 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2345 for other users. Others should always drop root privileges if they use
2346 -C on the command line, even for a whitelisted configure file.
2348 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2350 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2356 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2357 $data_path, and $header_path variables; fixed documentation bugs and
2360 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2361 exipick to access non-standard spools, including the "frozen" queue
2364 NM/01 Bugzilla 965: Support mysql stored procedures.
2365 Patch from Alain Williams
2367 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2369 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2370 Patch from Andreas Metzler
2372 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2373 Patch from Kirill Miazine
2375 NM/05 Bugzilla 671: Added umask to procmail example.
2377 JJ/03 installed exipick 20100323.0, fixing doc bug
2379 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2380 directory. Notification and patch from Dan Rosenberg.
2382 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2384 TK/02 Improve log output when DKIM signing operation fails.
2386 MH/01 Treat the transport option dkim_domain as a colon separated
2387 list, not as a single string, and sign the message with each element,
2388 omitting multiple occurences of the same signer.
2390 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2391 Bugzilla 985, 986. Patch by Simon Arlott
2393 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2394 Patch by Simon Arlott
2396 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2397 MBX locking. Notification from Dan Rosenberg.
2403 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2405 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2407 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2409 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2411 NM/04 Bugzilla 915: Flag broken perl installation during build.
2417 TK/01 Added patch by Johannes Berg that expands the main option
2418 "spamd_address" if it starts with a dollar sign.
2420 TK/02 Write list of recipients to X-Envelope-Sender header when building
2421 the mbox-format spool file for content scanning (suggested by Jakob
2424 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2425 (http://www.dcc-servers.net/) support via dccifd. Activated by
2426 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2428 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2429 by Mark Daniel Reidel <mr@df.eu>.
2431 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2432 When building exim an external PCRE library is now needed -
2433 PCRE is a system library on the majority of modern systems.
2434 See entry on PCRE_LIBS in EDITME file.
2436 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2437 conversation. Added nologin parameter to request.
2438 Patch contributed by Kirill Miazine.
2440 TF/01 Do not log submission mode rewrites if they do not change the address.
2442 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2444 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2445 log files in place. Contributed by Roberto Lima.
2447 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2449 TF/03 Bugzilla 615: When checking the local_parts router precondition
2450 after a local_part_suffix or local_part_prefix option, Exim now
2451 does not use the address's named list lookup cache, since this
2452 contains cached lookups for the whole local part.
2454 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2455 Robert Millan. Documentation is in experimental-spec.txt.
2457 TF/04 Bugzilla 668: Fix parallel build (make -j).
2459 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2461 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2462 Patch provided by Jan Srzednicki.
2464 TF/05 Leading white space used to be stripped from $spam_report which
2465 wrecked the formatting. Now it is preserved.
2467 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2468 that they are available at delivery time.
2470 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2472 TF/08 TLS error reporting now respects the incoming_interface and
2473 incoming_port log selectors.
2475 TF/09 Produce a more useful error message if an SMTP transport's hosts
2476 setting expands to an empty string.
2478 NM/06 Bugzilla 744: EXPN did not work under TLS.
2479 Patch provided by Phil Pennock.
2481 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2482 Patch provided by Richard Godbee.
2484 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2485 acl_smtp_notquit, added index entry.
2487 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2488 Patch provided by Eugene Bujak.
2490 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2491 accept(). Patch provided by Maxim Dounin.
2493 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2494 Patch provided by Phil Pennock.
2496 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2498 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2499 Patch provided by Brad "anomie" Jorsch.
2501 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2502 Patch provided by Dean Brooks.
2504 TK/05 Add native DKIM support (does not depend on external libraries).
2506 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2507 Patch provided by Graeme Fowler.
2509 NM/16 Bugzilla 851: Documentation example syntax fix.
2511 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2513 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2516 NM/19 Bugzilla 745: TLS version reporting.
2517 Patch provided by Phil Pennock.
2519 NM/20 Bugzilla 167: bool: condition support.
2520 Patch provided by Phil Pennock.
2522 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2523 clients. Patch provided by Phil Pennock.
2525 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2526 Patch provided by Brad "anomie" Jorsch.
2528 NM/23 Bugzilla 687: Fix misparses in eximstats.
2529 Patch provided by Heiko Schlittermann.
2531 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2532 Patch provided by Heiko Schlittermann.
2534 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2535 plus update to original patch.
2537 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2539 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2540 Patch provided by David Brownlee.
2542 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2544 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2546 NM/30 Bugzilla 888: TLS documentation bugfixes.
2548 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2550 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2551 Unlike the original bugzilla I have changed all shell scripts in src tree.
2553 NM/33 Bugzilla 898: Transport filter timeout fix.
2554 Patch by Todd Rinaldo.
2556 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2557 Patch by Serge Demonchaux.
2559 NM/35 Bugzilla 39: Base64 decode bug fixes.
2560 Patch by Jakob Hirsch.
2562 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2564 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2566 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2568 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2574 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2575 ALT-N's libdkim that I have put here:
2576 http://duncanthrax.net/exim-experimental/
2578 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2579 were called 'true' and it seems that C99 defines that as a reserved
2580 keyword to be used with 'bool' variable types. That means you could
2581 not include C99-style headers which use bools without triggering
2582 build errors in sieve.c.
2584 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2585 as mailq or other aliases. Changed the --help handling significantly
2586 to do whats expected. exim_usage() emits usage/help information.
2588 SC/01 Added the -bylocaldomain option to eximstats.
2590 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2592 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2594 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2600 PH/01 Another patch from the Sieve maintainer.
2602 PH/02 When an IPv6 address is converted to a string for single-key lookup
2603 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2604 dots are used instead of colons so that keys in lsearch files need not
2605 contain colons. This was done some time before quoting was made available
2606 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2607 (notated using the quote facility) so as to distinguish them from IPv4
2608 keys. This meant that lookups for IP addresses in host lists did not work
2609 for iplsearch lookups.
2611 This has been fixed by arranging for IPv6 addresses to be expressed with
2612 colons if the lookup type is iplsearch. This is not incompatible, because
2613 previously such lookups could never work.
2615 The situation is now rather anomalous, since one *can* have colons in
2616 ordinary lsearch keys. However, making the change in all cases is
2617 incompatible and would probably break a number of configurations.
2619 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2622 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2623 conversion specification without a maximum field width, thereby enabling
2624 a rogue spamd server to cause a buffer overflow. While nobody in their
2625 right mind would setup Exim to query an untrusted spamd server, an
2626 attacker that gains access to a server running spamd could potentially
2627 exploit this vulnerability to run arbitrary code as the Exim user.
2629 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2630 $primary_hostname instead of what libspf2 thinks the hosts name is.
2632 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2633 a directory entry by the name of the lookup key. Previously, if a
2634 symlink pointed to a non-existing file or a file in a directory that
2635 Exim lacked permissions to read, a lookup for a key matching that
2636 symlink would fail. Now it is enough that a matching directory entry
2637 exists, symlink or not. (Bugzilla 503.)
2639 PH/03 The body_linecount and body_zerocount variables are now exported in the
2642 PH/04 Added the $dnslist_matched variable.
2644 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2645 This means they are set thereafter only if the connection becomes
2648 PH/06 Added the client_condition to authenticators so that some can be skipped
2649 by clients under certain conditions.
2651 PH/07 The error message for a badly-placed control=no_multiline_responses left
2652 "_responses" off the end of the name.
2654 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2656 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2657 (without spaces) instead of just copying the configuration text.
2659 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2661 PH/11 Added $max_received_linelength.
2663 PH/12 Added +ignore_defer and +include_defer to host lists.
2665 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2666 way in which PCRE > 7.0 is built.
2668 PH/14 Implemented queue_only_load_latch.
2670 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2671 MAIL command. The effect was to mangle the value on 64-bit systems.
2673 PH/16 Another patch from the Sieve maintainer.
2675 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2677 PH/18 If a system quota error occurred while trying to create the file for
2678 a maildir delivery, the message "Mailbox is full" was not appended to the
2679 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2680 only to a quota excession during the actual writing of the file.
2682 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2683 characters?) which causes problems in log lines. The DN values are now
2684 passed through string_printing() before being added to log lines.
2686 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2687 and InterBase are left for another time.)
2689 PH/21 Added message_body_newlines option.
2691 PH/22 Guard against possible overflow in moan_check_errorcopy().
2693 PH/23 POSIX allows open() to be a macro; guard against that.
2695 PH/24 If the recipient of an error message contained an @ in the local part
2696 (suitably quoted, of course), incorrect values were put in $domain and
2697 $local_part during the evaluation of errors_copy.
2703 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2704 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2707 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2708 issue a MAIL command.
2710 PH/02 In an ACL statement such as
2712 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2714 if a client was not listed at all, or was listed with a value other than
2715 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2716 the condition was not true (as it should be), so access was not denied.
2717 The bug was that the ! inversion was incorrectly passed on to the second
2718 item. This has been fixed.
2720 PH/03 Added additional dnslists conditions == and =& which are different from
2721 = and & when the dns lookup returns more than one IP address.
2723 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2724 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2726 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2727 FSYNC, which compiles an option called disable_fsync that allows for
2728 bypassing fsync(). The documentation is heavily laced with warnings.
2730 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2732 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2733 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2734 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2735 including adding "make clean"; (3) Added -fPIC when compiling the test
2736 dynamically loaded module, to get rid of a warning.
2738 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2739 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2740 = 0s. The bug is otherwise harmless.
2742 PH/07 There was a bug in the dovecot authenticator such that the value of
2743 $auth1 could be overwritten, and so not correctly preserved, after a
2744 successful authentication. This usually meant that the value preserved by
2745 the server_setid option was incorrect.
2747 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2749 PH/09 Installed PCRE release 7.0.
2751 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2752 run for batched SMTP input. It is now run at the start of every message
2753 in the batch. While fixing this I discovered that the process information
2754 (output by running exiwhat) was not always getting set for -bs and -bS
2755 input. This is fixed, and it now also says "batched" for BSMTP.
2757 PH/11 Added control=no_pipelining.
2759 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2760 patch, slightly modified), and move the expansion of helo_data till after
2761 the connection is made in the smtp transport (so it can use these
2764 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2766 PH/14 Added log_selector = +pid.
2768 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2770 PH/16 Add ${if forany and ${if forall.
2772 PH/17 Added dsn_from option to vary the From: line in DSNs.
2774 PH/18 Flush SMTP output before performing a callout, unless control =
2775 no_callout_flush is set.
2777 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2778 was true (the default) a successful delivery failed to delete the retry
2779 item, thus causing premature timeout of the address. The bug is now
2782 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2784 PH/21 Long custom messages for fakedefer and fakereject are now split up
2785 into multiline responses in the same way that messages for "deny" and
2786 other ACL rejections are.
2788 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2789 with slight modification.
2791 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2792 draft, changing the syntax and factoring some duplicate code".
2794 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2795 for deliveries of the second and subsequent messages over the same SMTP
2798 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2799 ${reduce, with only minor "tidies".
2801 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2803 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2804 expansion side effects.
2806 PH/27 When a message times out after an over-quota error from an Exim-imposed
2807 quota, the bounce message says "mailbox is full". This message was not
2808 being given when it was a system quota that was exceeded. It now should
2811 MH/03 Made $recipients available in local_scan(). local_scan() already has
2812 better access to the recipient list through recipients_list[], but
2813 $recipients can be useful in postmaster-provided expansion strings.
2815 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2816 in the case of a MAIL command with additional options following the
2817 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2818 were accidentally chopped off.
2820 PH/29 SMTP synchronization checks are implemented when a command is read -
2821 there is a check that no more input is waiting when there shouldn't be
2822 any. However, for some commands, a delay in an ACL can mean that it is
2823 some time before the response is written. In this time, more input might
2824 arrive, invalidly. So now there are extra checks after an ACL has run for
2825 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2826 pipelining has not been advertised.
2828 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2830 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2831 returned in the SMTP response when smtp_return_error_details was false.
2832 This has been fixed.
2834 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2835 instead of the C I/O that was originally supplied, because problems were
2836 reported on Solaris.
2838 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2839 Exim which did not show up earlier: it was assuming that a call to
2840 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2841 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2842 was a macro that became an assignment, so it seemed to work. This has
2843 changed to a proper function call with a void return, hence the compile
2844 error. Exim's code has been fixed.
2846 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2849 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2851 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2853 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2854 because it turns out to be too big or there is a timeout) there is no
2855 "Completed" line in the log. When some messages of this type were
2856 selected by exigrep, they were listed as "not completed". Others were
2857 picked up by some special patterns. I have improved the selection
2858 criteria to be more general.
2860 PH/38 The host_find_failed option in the manualroute router can now be set
2861 to "ignore", to completely ignore a host whose IP address cannot be
2862 found. If all hosts are ignored, the behaviour is controlled by the new
2863 host_all_ignored option.
2865 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2866 homing or because of multiple MX records with /mx) generated more than
2867 one IP address, and the following item turned out to be the local host,
2868 all the secondary addresses of the first item were incorrectly removed
2869 from the list, along with the local host and any following hosts (which
2870 is what is supposed to happen).
2872 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2873 whoever called Exim into the -H file. In the case of the daemon it was
2874 behaving confusingly. When first started, it used values for whoever
2875 started the daemon, but after a SIGHUP it used the Exim user (because it
2876 calls itself on a restart). I have changed the code so that it now always
2879 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2880 message are rejected with the same error (e.g. no authentication or bad
2881 sender address), and a DATA command is nevertheless sent (as can happen
2882 with PIPELINING or a stupid MUA), the error message that was given to the
2883 RCPT commands is included in the rejection of the DATA command. This is
2884 intended to be helpful for MUAs that show only the final error to their
2887 PH/42 Another patch from the Sieve maintainer.
2889 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2890 Eximstats - Fixed some broken HTML links and added missing column headers
2892 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2893 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2895 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2897 PH/43 Yet another patch from the Sieve maintainer.
2899 PH/44 I found a way to check for a TCP/IP connection going away before sending
2900 the response to the final '.' that terminates a message, but only in the
2901 case where the client has not sent further data following the '.'
2902 (unfortunately, this is allowed). However, in many cases there won't be
2903 any further data because there won't be any more messages to send. A call
2904 to select() can be used: if it shows that the input is "ready", there is
2905 either input waiting, or the socket has been closed. An attempt to read
2906 the next input character can distinguish the two cases. Previously, Exim
2907 would have sent an OK response which the client would never have see.
2908 This could lead to message repetition. This fix should cure that, at
2909 least in a lot of common cases.
2911 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2912 advertised in response to EHLO.
2918 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2919 fixed by 4.65/MH/01 (is this a record?) are fixed:
2921 (i) An empty string was always treated as zero by the numeric comparison
2922 operators. This behaviour has been restored.
2924 (ii) It is documented that the numeric comparison operators always treat
2925 their arguments as decimal numbers. This was broken in that numbers
2926 starting with 0 were being interpreted as octal.
2928 While fixing these problems I realized that there was another issue that
2929 hadn't been noticed. Values of message_size_limit (both the global option
2930 and the transport option) were treated as octal if they started with 0.
2931 The documentation was vague. These values are now always treated as
2932 decimal, and I will make that clear in the documentation.
2938 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2939 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2942 MH/01 Don't check that the operands of numeric comparison operators are
2943 integers when their expansion is in "skipping" mode (fixes bug
2944 introduced by 4.64-PH/07).
2946 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2947 child addresses, Exim now panics and dies. Previously, because the count
2948 is held in a short int, deliveries were likely to be lost. As such a
2949 large number of recipients for a single message is ridiculous
2950 (performance will be very, very poor), I have chosen to impose a limit
2951 rather than extend the field.
2957 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2958 leftover -K file (the existence of which was triggered by #402).
2959 While we were at it, introduced process PID as part of the -K
2960 filename. This should rule out race conditions when creating
2963 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2964 processing considerably. Previous code took too long for large mails,
2965 triggering a timeout which in turn triggers #401.
2967 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2968 in the DK code in transports.c. sendfile() is not really portable,
2969 hence the _LINUX specificness.
2971 TF/01 In the add_headers option to the mail command in an Exim filter,
2972 there was a bug that Exim would claim a syntax error in any
2973 header after the first one which had an odd number of characters
2976 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2977 callout verification, Exim cached a "reject" for the entire domain. This
2978 is correct for most verifications, but it is not correct for a recipient
2979 verification with use_sender or use_postmaster set, because in that case
2980 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2981 case of MAIL FROM:<> rejection from other early rejections (e.g.
2982 rejection of HELO). When verifying a recipient using a non-null MAIL
2983 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2984 Whatever the result of the callout, the value of the domain cache is
2985 left unchanged (for any other kind of callout, getting as far as trying
2986 RCPT means that the domain itself is ok).
2988 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2991 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2992 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2993 session, the daemon ignores ECONNECT errors and logs others; it now
2994 ignores EPIPE as well.
2996 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2997 (quoted-printable decoding).
2999 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3000 later the small subsequent patch to fix an introduced bug.
3002 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3004 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3006 PH/08 An error is now given if message_size_limit is specified negative.
3008 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3009 to be given (somewhat) arbitrary names.
3011 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3014 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3015 miscellaneous code fixes
3017 PH/10 Added the log_reject_target ACL modifier to specify where to log
3020 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3021 hostname. This is wrong, because it relates to the incoming message (and
3022 probably the interface on which it is arriving) and not to the outgoing
3023 callout (which could be using a different interface). This has been
3024 changed to use the value of the helo_data option from the smtp transport
3025 instead - this is what is used when a message is actually being sent. If
3026 there is no remote transport (possible with a router that sets up host
3027 addresses), $smtp_active_hostname is used.
3029 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3030 tweaks were necessary in order to get it to work (see also 21 below):
3031 (a) The code assumed that strncpy() returns a negative number on buffer
3032 overflow, which isn't the case. Replaced with Exim's string_format()
3034 (b) There were several signed/unsigned issues. I just did the minimum
3035 hacking in of casts. There is scope for a larger refactoring.
3036 (c) The code used strcasecmp() which is not a standard C function.
3037 Replaced with Exim's strcmpic() function.
3038 (d) The code set only $1; it now sets $auth1 as well.
3039 (e) A simple test gave the error "authentication client didn't specify
3040 service in request". It would seem that Dovecot has changed its
3041 interface. Fortunately there's a specification; I followed it and
3042 changed what the client sends and it appears to be working now.
3044 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3047 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3048 address A is aliased to B and C, where B exists and C does not. Without
3049 -v the output is "A verified" because verification stops after a
3050 successful redirection if more than one address is generated. However,
3051 with -v the child addresses are also verified. Exim was outputting "A
3052 failed to verify" and then showing the successful verification for C,
3053 with its parentage. It now outputs "B failed to verify", showing B's
3054 parentage before showing the successful verification of C.
3056 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3057 look up a TXT record in a specific list after matching in a combined
3060 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3061 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3062 they consult the DNS. I had assumed they would set it the way they
3063 wanted; and indeed my experiments on Linux seem to show that in some
3064 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3065 To be on the safe side, however, I have now made the interface to
3066 host_find_byname() similar to host_find_bydns(), with an argument
3067 containing the DNS resolver options. The host_find_byname() function now
3068 sets these options at its start, just as host_find_bydns() does. The smtp
3069 transport options dns_qualify_single and dns_search_parents are passed to
3070 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3071 of host_find_byname() use the default settings of RES_DEFNAMES
3072 (qualify_single) but not RES_DNSRCH (search_parents).
3074 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3075 spool_read_header() do less string testing, by means of a preliminary
3076 switch on the second character of optional "-foo" lines. (This is
3077 overdue, caused by the large number of possibilities that now exist.
3078 Originally there were few.) While I was there, I also converted the
3079 str(n)cmp tests so they don't re-test the leading "-" and the first
3080 character, in the hope this might squeeze out yet more improvement.
3082 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3083 flag allowing group syntax was set by the header_syntax check but not
3084 turned off, possible causing trouble later; (2) The flag was not being
3085 set at all for the header_verify test, causing "group"-style headers to
3086 be rejected. I have now set it in this case, and also caused header_
3087 verify to ignore an empty address taken from a group. While doing this, I
3088 came across some other cases where the code for allowing group syntax
3089 while scanning a header line wasn't quite right (mostly, not resetting
3090 the flag correctly in the right place). These bugs could have caused
3091 trouble for malformed header lines. I hope it is now all correct.
3093 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3094 with the "reply" argument non-NULL. The code, however (which originally
3095 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3096 but it didn't always do it. This confused somebody who was copying the
3097 code for some other use. I have removed all the tests.
3099 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3100 feature that was used to support insecure browsers during the U.S. crypto
3101 embargo. It requires special client support, and Exim is probably the
3102 only MTA that supported it -- and would never use it because real RSA is
3103 always available. This code has been removed, because it had the bad
3104 effect of slowing Exim down by computing (never used) parameters for the
3105 RSA_EXPORT functionality.
3107 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3108 authenticator to fail if there's a tab character in the incoming data
3109 (there should never be unless someone is messing about, as it's supposed
3110 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3111 if the connection is using TLS or if the remote IP is the same as the
3112 local IP, and the "valid-client-cert option" if a client certificate has
3115 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3116 authenticators. This can be used for authorization after authentication
3117 succeeds. (In the case of plaintext, it servers for both authentication
3120 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3121 if any retry times were supplied.
3123 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3124 connection, where there is no client IP address to check. In this
3125 situation, the verify now always succeeds.
3127 PH/25 Applied John Jetmore's -Mset patch.
3129 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3131 PH/27 In a string expansion for a processed (not raw) header when multiple
3132 headers of the same name were present, leading whitespace was being
3133 removed from all of them, but trailing whitespace was being removed only
3134 from the last one. Now trailing whitespace is removed from each header
3135 before concatenation. Completely empty headers in a concatenation (as
3136 before) are ignored.
3138 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3139 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3141 PH/29 [Removed. This was a change that I later backed out, and forgot to
3142 correct the ChangeLog entry (that I had efficiently created) before
3143 committing the later change.]
3145 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3146 address errors (4xx response to RCPT) over the same connection as other
3147 messages routed to the same hosts. Such deliveries are always "forced",
3148 so retry times are not inspected. This resulted in far too many retries
3149 for the affected addresses. The effect occurred only when there were more
3150 hosts than the hosts_max_try setting in the smtp transport when it had
3151 the 4xx errors. Those hosts that it had tried were not added to the list
3152 of hosts for which the message was waiting, so if all were tried, there
3153 was no problem. Two fixes have been applied:
3155 (i) If there are any address or message errors in an SMTP delivery, none
3156 of the hosts (tried or untried) are now added to the list of hosts
3157 for which the message is waiting, so the message should not be a
3158 candidate for sending over the same connection that was used for a
3159 successful delivery of some other message. This seems entirely
3160 reasonable: after all the message is NOT "waiting for some host".
3161 This is so "obvious" that I'm not sure why it wasn't done
3162 previously. Hope I haven't missed anything, but it can't do any
3163 harm, as the worst effect is to miss an optimization.
3165 (ii) If, despite (i), such a delivery is accidentally attempted, the
3166 routing retry time is respected, so at least it doesn't keep
3167 hammering the server.
3169 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3170 in ${readsocket because some servers need this prod.
3172 PH/32 Added some extra debug output when updating a wait-xxx database.
3174 PH/33 The hint "could be header name not terminated by colon", which has been
3175 given for certain expansion errors for a long time, was not being given
3176 for the ${if def:h_colon_omitted{... case.
3178 PH/34 The spec says: "With one important exception, whenever a domain list is
3179 being scanned, $domain contains the subject domain." There was at least
3180 one case where this was not true.
3182 PH/35 The error "getsockname() failed: connection reset by peer" was being
3183 written to the panic log as well as the main log, but it isn't really
3184 panic-worthy as it just means the connection died rather early on. I have
3185 removed the panic log writing for the ECONNRESET error when getsockname()
3188 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3189 runs only) independently of the message's sender address. This meant
3190 that, if the 4xx error was in fact related to the sender, a different
3191 message to the same recipient with a different sender could confuse
3192 things. In particular, this can happen when sending to a greylisting
3193 server, but other circumstances could also provoke similar problems.
3194 I have changed the default so that the retry time for these errors is now
3195 based a combination of the sender and recipient addresses. This change
3196 can be overridden by setting address_retry_include_sender=false in the
3199 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3200 remote server are returned as part of bounce messages. This was not
3201 happening for LMTP over a pipe (the lmtp transport), but now it is the
3202 same for both kinds of LMTP.
3204 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3205 in header lines that were in fact CNAMEs. This is no longer the case.
3207 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3208 and queue runs started by the daemon processed all messages. This has
3209 been fixed so that -R and -S can now usefully be given with -q<time>.
3211 PH/40 Import PCRE release 6.7 (fixes some bugs).
3213 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3215 PH/42 Give an error if -q is specified more than once.
3217 PH/43 Renamed the variables $interface_address and $interface_port as
3218 $received_ip_address and $received_port, to make it clear that these
3219 values apply to message reception, and not to the outgoing interface when
3220 a message is delivered. (The old names remain recognized, of course.)
3222 PH/44 There was no timeout on the connect() call when using a Unix domain
3223 socket in the ${readsocket expansion. There now is.
3225 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3226 be meaningful with "accept".
3228 SC/01 Eximstats V1.43
3229 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3231 SC/02 Eximstats V1.44
3232 Use a glob alias rather than an array ref in the generated
3233 parser. This improves both readability and performance.
3235 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3236 Collect SpamAssassin and rejection statistics.
3237 Don't display local sender or destination tables unless
3238 there is data to show.
3239 Added average volumes into the top table text output.
3241 SC/04 Eximstats V1.46
3242 Collect data on the number of addresses (recipients)
3243 as well as the number of messages.
3245 SC/05 Eximstats V1.47
3246 Added 'Message too big' to the list of mail rejection
3247 reasons (thanks to Marco Gaiarin).
3249 SC/06 Eximstats V1.48
3250 Mainlog lines which have GMT offsets and are too short to
3251 have a flag are now skipped.
3253 SC/07 Eximstats V1.49 (Alain Williams)
3254 Added the -emptyok flag.
3256 SC/08 Eximstats V1.50
3257 Fixes for obtaining the IP address from reject messages.
3259 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3260 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3261 whitespace changes from 4.64-PH/27
3263 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3266 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3267 are found, allow negative numbers in numeric criteria)
3269 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3271 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3272 to match changes made in 4.64-PH/43
3274 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3276 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3277 "domain" is actually an IP address, and force a failure. This locks out
3278 those revolvers/nameservers that support "A-for-A" lookups, in
3279 contravention of the specifications.
3281 PH/48 When a host name was looked up from an IP address, and the subsequent
3282 forward lookup of the name timed out, the host name was left in
3283 $sender_host_name, contrary to the specification.
3285 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3286 restricted to single-key lookups, Exim was not diagnosing an error if
3287 * or *@ was used with a query-style lookup.
3289 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3291 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3292 long ago, but noone interested enough thought of it. Let's just say that
3293 the "1.1" means that there are some new functions that weren't there at
3294 some point in the past.
3296 PH/51 Error processing for expansion failure of helo_data from an smtp
3297 transport during callout processing was broken.
3299 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3300 tested/used via the -bh/-bhc/-bs options.
3302 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3303 bug, fixed in subsequent PCRE releases).
3305 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3306 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3308 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3314 SC/01 Use a glob alias rather than an array ref in eximstats generated
3315 parser. This improves both readability and performance.
3317 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3318 Don't display local sender or destination tables in eximstats unless
3319 there is data to show.
3320 Added average volumes into the eximstats top table text output.
3322 SC/03 Collect data on the number of addresses (recipients) as well
3323 as the number of messages in eximstats.
3325 TF/01 Correct an error in the documentation for the redirect router. Exim
3326 does (usually) call initgroups() when daemonizing.
3328 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3329 with consistent privilege compared to when running as a daemon.
3331 TF/03 Note in the spec that $authenticated_id is not set for local
3332 submissions from trusted users.
3334 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3335 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3337 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3338 by adding some example configuration directives to the default
3339 configuration file. A little bit of work is required to uncomment the
3340 directives and define how usernames and passwords are checked, but
3341 there is now a framework to start from.
3343 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3344 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3345 without this. I don't know how relevant this is to other LDAP libraries.
3347 PH/02 Add the verb name to the "unknown ACL verb" error.
3349 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3351 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3353 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3354 directory not expanded when it should be if an expanded home directory
3355 was set for the address (which is overridden by the transport).
3357 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3360 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3361 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3362 because it is too late at that time, and has no effect.
3364 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3365 security issue with \' (bugzilla #107). I could not use the
3366 PQescapeStringConn() function, because it needs a PGconn value as one of
3369 PH/08 When testing addresses using -bt, indicate those final addresses that
3370 are duplicates that would not cause an additional delivery. At least one
3371 person was confused, thinking that -bt output corresponded to deliveries.
3372 (Suppressing duplicates isn't a good idea as you lose the information
3373 about possibly different redirections that led to the duplicates.)
3375 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3376 systems where poll() doesn't work, in particular OS X.
3378 PH/10 Added more information to debugging output for retry time not reached.
3380 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3381 operations in malware.c.
3383 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3386 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3387 syslog_duplication set false, log lines that would normally be written
3388 both the the main log and to the reject log were not written to syslog at
3391 PH/14 In the default configuration, change the use of "message" in ACL warn
3392 statements to "add_header".
3394 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3395 not followed by a command (e.g. "seen endif").
3397 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3398 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3401 PH/17 Added extra conditions to the default value of delay_warning_condition
3405 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3406 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3407 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3410 The Auto-Submitted: and various List- headers are standardised, whereas I
3411 don't think Precedence: ever was.
3413 PH/18 Refactored debugging code in route_finduser() to show more information,
3414 in particular, the error code if getpwnam() issues one.
3416 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3417 This is apparently needed in addition to the PH/07 change above to avoid
3418 any possible encoding problems.
3420 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3421 but not after initializing Perl.
3423 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3424 output them only if debugging. By default they are written stderr,
3425 apparently, which is not desirable.
3427 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3430 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3433 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3435 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3436 authenticated or an ident call has been made. Suppress the default
3437 values for $authenticated_id and $authenticated_sender (but permit -oMai
3438 and -oMas) when testing with -bh.
3440 PH/24 Re-jigged the order of the tests in the default configuration so that the
3441 tests for valid domains and recipients precede the DNS black list and CSA
3442 tests, on the grounds that those ones are more expensive.
3444 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3445 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3446 This bug exists in every version of Exim that I still have, right back to
3449 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3450 However, an attempt to turn on case-sensitivity in a regex key by
3451 including (?-i) didn't work because the subject string was already
3452 lowercased, and the effects were non-intuitive. It turns out that a
3453 one-line patch can be used to allow (?-i) to work as expected.
3459 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3460 other effects) broke the use of negated acl sub-conditions.
3462 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3465 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3466 "Deny" causes Exim to reject the incoming connection with a 554 error.
3467 Unfortunately, if there is a major crisis, such as a disk failure,
3468 tcp-wrappers gives "deny", whereas what one would like would be some
3469 kind of temporary error. A kludge has been added to help with this.
3470 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3471 554 error is used if errno is still zero or contains ENOENT (which occurs
3472 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3475 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3477 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3478 errors. Otherwise a message that provokes a temporary error (when other
3479 messages do not) can cause a whole host to time out.
3481 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3482 addresses were routed directly to files or pipes from a redirect router.
3483 File deliveries just didn't batch; pipe deliveries might have suffered
3486 PH/06 A failure to get a lock for a hints database would erroneously always say
3487 "Failed to get write lock", even when it was really a read lock.
3489 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3490 of 0600. This has been changed to use the value of the lockfile_mode
3491 option (which defaults to 0600).
3493 PH/08 Applied small patch from the Sieve maintainer.
3495 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3496 folder from quota calculations, a direct delivery into this folder messed
3497 up the contents of the maildirsize file. This was because the regex was
3498 used only to exclude .Trash (or whatever) when the size of the mailbox
3499 was calculated. There was no check that a delivery was happening into an
3500 excluded directory. This bug has been fixed by ignoring all quota
3501 processing for deliveries into excluded directories.
3503 PH/10 Added the maildirfolder_create_regex option to appendfile.
3509 PH/01 The code for finding all the local interface addresses on a FreeBSD
3510 system running IPv6 was broken. This may well have applied to all BSD
3511 systems, as well as to others that have similar system calls. The broken
3512 code found IPv4 interfaces correctly, but gave incorrect values for the
3513 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3514 that it would not match correctly against @[] and not recognize the IPv6
3517 PH/02 The ipliteral router was not recognizing addresses of the form user@
3518 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3520 PH/03 Added disable_ipv6.
3522 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3523 decoded form, because it is most often used to construct To: headers
3524 lines in autoreplies, and the decoded form may well be syntactically
3525 invalid. However, $reply_address has leading white space removed, and all
3526 newlines turned into spaces so that the autoreply transport does not
3529 PH/05 If group was specified without a user on a router, and no group or user
3530 was specified on a transport, the group from the router was ignored.
3532 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3533 for visible compile-time settings that can be used to change these
3534 numbers, for those that want even more. Backwards compatibility with old
3535 spool files has been maintained. However, going back to a previous Exim
3536 release will lost any variables that are in spool files.
3538 PH/07 Two small changes when running in the test harness: increase delay when
3539 passing a TCP/IP connection to a new process, in case the original
3540 process has to generate a bounce, and remove special handling of
3541 127.0.0.2 (sic), which is no longer necessary.
3543 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3544 be the same on different OS.
3546 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3549 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3550 whether --show-vars was specified or not
3552 JJ/02 exipick: Added support for new ACL variable spool format introduced
3555 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3556 syntactically invalid From: or Reply-to: line, and a filter used this to
3557 generate an autoreply, and therefore failed to obtain an address for the
3558 autoreply, Exim could try to deliver to a non-existent relative file
3559 name, causing unrelated and misleading errors. What now happens is that
3560 it logs this as a hard delivery error, but does not attempt to create a
3563 PH/11 The exinext utility has a -C option for testing purposes, but although
3564 the given file was scanned by exinext itself; it wasn't being passed on
3565 when Exim was called.
3567 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3568 an end-of-file indication when reading a command response.
3570 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3571 compiled. In many other places in Exim, IPv6 addresses are always
3572 recognized, so I have changed this. It also means that IPv4 domain
3573 literals of the form [IPV4:n.n.n.n] are now always recognized.
3575 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3576 used if the router is not running as root, for example, when verifying at
3577 ACL time, or when using -bh. The debugging output from this situation was
3578 non-existent - all you got was a failure to exec. I have made two
3581 (a) Failures to set uid/gid, the current directory, or a process leader
3582 in a subprocess such as that created by queryprogram now generate
3583 suitable debugging output when -d is set.
3585 (b) The queryprogram router detects when it is not running as root,
3586 outputs suitable debugging information if -d is set, and then runs
3587 the subprocess without attempting to change uid/gid.
3589 PH/15 Minor change to Makefile for building test_host (undocumented testing
3592 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3593 additional section of a DNS packet that returns MX or SRV records.
3594 Instead, it always explicitly searches for A/AAAA records. This avoids
3595 major problems that occur when a DNS server includes only records of one
3596 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3597 fixed another bug: if SRV records were looked up and the corresponding
3598 address records were *not* found in the additional section, the port
3599 values from the SRV records were lost.
3601 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3602 using the correct key (the original address) when searching the retry
3603 rules in order to find which one to use for generating the retry hint.
3605 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3606 adding the default one. Similarly, if it contains a Reply-To: header, the
3607 errors_reply_to option, if set, is not used.
3609 PH/19 When calculating a retry time, Exim used to measure the "time since
3610 failure" by looking at the "first failed" field in the retry record. Now
3611 it does not use this if it is later than than the arrival time of the
3612 message. Instead it uses the arrival time. This makes for better
3613 behaviour in cases where some deliveries succeed, thus re-setting the
3614 "first failed" field. An example is a quota failure for a huge message
3615 when small messages continue to be delivered. Without this change, the
3616 "time since failure" will always be short, possible causing more frequent
3617 delivery attempts for the huge message than are intended.
3618 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3620 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3621 $1, $2, $3) because the numerical variables can be reset during some
3622 expansion items (e.g. "match"), thereby losing the authentication data.
3624 PH/21 Make -bV show the size of off_t variables so that the test suite can
3625 decide whether to run tests for quotas > 2G.
3627 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3628 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3629 filecount value is greater than 2G or if a quota value is greater than 2G
3630 on a system where the size of off_t is not greater than 4, a panic error
3633 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3634 never match. The debug and -bh output now contains an explicit error
3635 message indicating a malformed IPv4 address or mask.
3637 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3638 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3639 PH/23 above applies.
3641 PH/25 Do not write to syslog when running in the test harness. The only
3642 occasion when this arises is a failure to open the main or panic logs
3643 (for which there is an explicit test).
3645 PH/26 Added the /no_tell option to "control=freeze".
3647 PH/27 If a host name lookup failed very early in a connection, for example, if
3648 the IP address matched host_lookup and the reverse lookup yielded a name
3649 that did not have a forward lookup, an error message of the form "no IP
3650 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3651 could be logged. Now it outputs the IP address instead of "NULL".
3653 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3654 allows the sender and the authenticated sender to be set when
3655 submitting a message from within Exim. Since child_open_exim() is
3656 documented for local_scan(), the new function should be too.
3658 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3659 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3660 results in an empty string is now treated as unset.
3662 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3664 PH/31 Added sender_verify_fail logging option.
3666 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3667 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3668 tidied the source and removed it altogether.
3670 PH/33 When a queue run was abandoned because the load average was too high, a
3671 log line was always written; now it is written only if the queue_run log
3672 selector is set. In addition, the log line for abandonment now contains
3673 information about the queue run such as the pid. This is always present
3674 in "start" and "stop" lines but was omitted from the "abandon" line.
3676 PH/34 Omit spaces between a header name and the colon in the error message that
3677 is given when verify = headers_syntax fails (if there are lots of them,
3678 the message gets confusing).
3680 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3681 names, as there are now some PTR records that contain slashes. This check
3682 is only to protect against broken name servers that fall over on strange
3683 characters, so the fact that it applies to all lookups doesn't matter.
3685 PH/36 Now that the new test suite is complete, we can remove some of the
3686 special code in Exim that was needed for the old test suite. For example,
3687 sorting DNS records because real resolvers return them in an arbitrary
3688 order. The new test suite's fake resolver always returns records in the
3691 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3692 bounces) except when queue_only is set, to avoid logging races between
3693 the different processes.
3695 PH/38 Panic-die if .include specifies a non-absolute path.
3697 PH/39 A tweak to the "H" retry rule from its user.
3699 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3700 a label. They prevented compilation on older perls.
3702 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3703 a warning to be raised on newish perls.
3705 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3706 on queue. Changes to match documented behaviour of showing count of
3707 messages matching specified criteria.
3709 PH/40 Changed the default ident timeout from 30s to 5s.
3711 PH/41 Added support for the use of login_cap features, on those BSD systems
3712 that have them, for controlling the resources used by pipe deliveries.
3714 PH/42 The content-scanning code uses fopen() to create files in which to put
3715 message data. Previously it was not paying any attention to the mode of
3716 the files. Exim runs with umask(0) because the rest of the code creates
3717 files with open(), and sets the required mode explicitly. Thus, these
3718 files were ending up world-writeable. This was not a big issue, because,
3719 being within the spool directory, they were not world-accessible. I have
3720 created a function called modefopen, which takes an additional mode
3721 argument. It sets umask(777), creates the file, chmods it to the required
3722 mode, then resets the umask. All the relevant calls to fopen() in the
3723 content scanning code have been changed to use this function.
3725 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3726 to 24 hours. This avoids potential overflow problems when processing G
3727 and H retry rules. I suspect nobody ever tinkers with this value.
3729 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3731 PH/45 When the plaintext authenticator is running as a client, the server's
3732 challenges are checked to ensure they are valid base64 strings. By
3733 default, the authentication attempt is cancelled if an invalid string is
3734 received. Setting client_ignore_invalid_base64 true ignores these errors.
3735 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3736 they are received. Thus, the responses can be made to depend on the
3737 challenges. If an invalid string is ignored, an empty string is placed in
3740 PH/46 Messages that are created by the autoreply transport now contains a
3741 References: header, in accordance with RFCs 2822 and 3834.
3743 PH/47 Added authenticated_sender_force to the smtp transport.
3745 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3747 PH/49 Installed latest patch from the Sieve maintainer.
3749 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3750 was also set, the appendfile transport was unnecessarily scanning a
3751 directory of message files (e.g. for maildir delivery) to find the count
3752 of files (along with the size), even though it did not need this
3753 information. It now does the scan only if it needs to find either the
3754 size of the count of files.
3756 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3758 PH/52 Two bugs concerned with error handling when the smtp transport is
3761 (i) Exim was not creating retry information for temporary errors given
3762 for individual recipients after the DATA command when the smtp transport
3763 was used in LMTP mode. This meant that they could be retried too
3764 frequently, and not timed out correctly.
3766 (ii) Exim was setting the flag that allows error details to be returned
3767 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3768 recipients that were returned after the DATA command.
3770 PH/53 This is related to PH/52, but is more general: for any failing address,
3771 when detailed error information was permitted to be returned to the
3772 sender, but the error was temporary, then after the final timeout, only
3773 "retry timeout exceeded" was returned. Now it returns the full error as
3774 well as "retry timeout exceeded".
3776 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3777 do this, and (what is worse) MTAs that accept it.
3779 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3780 will now be deprecated.
3782 PH/56 New os.c-cygwin from the Cygwin maintainer.
3784 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3785 formats (previously only available in exim formats via -bpr, -bpru,
3786 and -bpra. Now also available in native and exiqgrep formats)
3788 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3789 with very large, slow to parse queues
3791 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3793 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3795 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3796 responses to authentication challenges, though it was showing the
3797 challenges; (ii) I've removed the CR characters from the debug output for
3800 PH/58 Allow for the insertion of a newline as well as a space when a string
3801 is turned into more than one encoded-word during RFC 2047 encoding. The
3802 Sieve code now uses this.
3804 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3805 data_4xx, lost_connection, tls_required.
3807 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3808 message was being sent as an SMTP response.
3810 PH/61 Add -l and -k options to exicyclog.
3812 PH/62 When verifying, if an address was redirected to one new address, so that
3813 verification continued, and the new address failed or deferred after
3814 having set something in $address_data, the value of $address_data was not
3815 passed back to the ACL. This was different to the case when no
3816 redirection occurred. The value is now passed back in both cases.
3818 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3819 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3820 use login_cap.h, so on its own it isn't the distinguishing feature. The
3821 new name refers directly to the setclassresources() function.
3823 PH/65 Added configuration files for NetBSD3.
3825 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3827 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3828 is preferred over IPv4.
3830 PH/68 The bounce_return_message and bounce_return_body options were not being
3831 honoured for bounces generated during the reception of non-SMTP messages.
3832 In particular, this applied to messages rejected by the ACL. This bug has
3833 been fixed. However, if bounce_return_message is true and bounce_return_
3834 body is false, the headers that are returned for a non-SMTP message
3835 include only those that have been read before the error was detected.
3836 (In the case of an ACL rejection, they have all been read.)
3838 PH/69 The HTML version of the specification is now built in a directory called
3839 spec_html instead of spec.html, because the latter looks like a path with
3840 a MIME-type, and this confuses some software.
3842 PH/70 Catch two compiler warnings in sieve.c.
3844 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3845 function verify_get_ident() calls ip_connect() to connect a socket, but
3846 if the "connect()" function timed out, ip_connect() used to close the
3847 socket. However, verify_get_ident() also closes the socket later, and in
3848 between Exim writes to the log, which may get opened at this point. When
3849 the socket was closed in ip_connect(), the log could get the same file
3850 descriptor number as the socket. This naturally causes chaos. The fix is
3851 not to close the socket in ip_connect(); the socket should be closed by
3852 the function that creates it. There was only one place in the code where
3853 this was missing, in the iplookup router, which I don't think anybody now
3854 uses, but I've fixed it anyway.
3856 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3857 well as to direct DNS lookups. Otherwise the handling of names in host
3858 lists is inconsistent and therefore confusing.
3864 PH/01 Two changes to the default runtime configuration:
3866 (1) Move the checks for relay_from_hosts and authenticated clients from
3867 after to before the (commented out) DNS black list checks.
3869 (2) Add control=submission to the relay_from_hosts and authenticated
3870 clients checks, on the grounds that messages accepted by these
3871 statements are most likely to be submissions.
3873 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3875 (1) Generate an error if the third argument for the ${prvs expansion is
3878 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3881 (3) Reset the variables that are obtained from the first argument of
3882 ${prvscheck and used in the second argument before leaving the code,
3883 because their memory is reclaimed, so using them afterwards may do
3886 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3887 one (it's much easier than Tom thought :-).
3889 (5) Because of (4), we can now allow for the use of $prvscheck_result
3890 inside the third argument.
3892 PH/03 For some reason, the default setting of PATH when running a command from
3893 a pipe transport was just "/usr/bin". I have changed it to
3896 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3897 anything to be listed in the output from -bV.
3899 PH/05 When a filter generated an autoreply, the entire To: header line was
3900 quoted in the delivery log line, like this:
3902 => >A.N.Other <ano@some.domain> <original@ddress> ...
3904 This has been changed so that it extracts the operative address. There
3905 may be more than one such address. If so, they are comma-separated, like
3908 => >ano@some.domain,ona@other.domain <original@ddress> ...
3910 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3911 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3912 not being looked up in the rDNS to get a host name, Exim was showing the
3913 IP address twice in Received: lines, even though the IP addresses were
3914 identical. For example:
3916 Received: from [1.2.3.4] (helo=[1.2.3.4])
3918 However, if the real host name was known, it was omitting the HELO data
3919 if it matched the actual IP address. This has been tidied up so that it
3920 doesn't show the same IP address twice.
3922 PH/07 When both +timestamp and +memory debugging was on, the value given by
3923 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3924 called by the debug printing, thereby overwriting the timestamp buffer.
3925 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3927 PH/08 When the original message was included in an autoreply transport, it
3928 always said "this is a copy of the message, including all the headers",
3929 even if body_only or headers_only was set. It now gives an appropriate
3932 PH/09 Applied a patch from the Sieve maintainer which:
3934 o fixes some comments
3935 o adds the (disabled) notify extension core
3936 o adds some debug output for the result of if/elsif tests
3937 o points to the current vacation draft in the documentation
3938 and documents the missing references header update
3942 o fixes a bug in processing the envelope test (when testing
3943 multiple envelope elements, the last element determined the
3946 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3947 Electronic Mail") by including:
3949 Auto-submitted: auto-generated
3951 in the messages that it generates (bounce messages and others, such as
3952 warnings). In the case of bounce messages for non-SMTP messages, there was
3953 also a typo: it was using "Auto_submitted" (underscore instead of
3954 hyphen). Since every message generated by Exim is necessarily in response
3955 to another message, thes have all been changed to:
3957 Auto-Submitted: auto-replied
3959 in accordance with these statements in the RFC:
3961 The auto-replied keyword:
3963 - SHOULD be used on messages sent in direct response to another
3964 message by an automatic process,
3966 - MUST NOT be used on manually-generated messages,
3968 - MAY be used on Delivery Status Notifications (DSNs) and Message
3969 Disposition Notifications (MDNs),
3971 - MUST NOT be used on messages generated by automatic or periodic
3972 processes, except for messages which are automatic responses to
3975 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3976 to the default Received: header definition.
3978 PH/12 Added log selector acl_warn_skipped (default on).
3980 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3981 variables because (a) they are in the wrong storage pool and (b) even if
3982 they were copied, it wouldn't work properly because of the caching.
3984 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3985 checking when decoding. Apparently there are clients that generate
3986 overlong encoded strings. Why am I not surprised?
3988 PH/15 If the first argument of "${if match_address" was not empty, but did not
3989 contain an "@" character, Exim crashed. Now it writes a panic log message
3990 and treats the condition as false.
3992 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3994 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3995 extension "envelope-auth". The code is finished and in agreement with
3996 other implementations, but there is no documentation so far and in fact,
3997 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3998 not changing the active code.
4000 Print executed "if" and "elsif" statements when debugging is used. This
4001 helps a great deal to understand what a filter does.
4003 Document more things not specified clearly in RFC3028. I had all this
4004 sorted out, when out of a sudden new issues came to my mind. Oops."
4006 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4009 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4010 canonical form (as documented). However, after a host name lookup from
4011 the IP address, check_host() was doing a simple string comparison with
4012 addresses acquired from the DNS when checking that the found name did
4013 have the original IP as one of its addresses. Since any found IPv6
4014 addresses are likely to be in abbreviated form, the comparison could
4015 fail. Luckily, there already exists a function for doing the comparison
4016 by converting both addresses to binary, so now that is used instead of
4017 the text comparison.
4019 PH/20 There was another similar case to PH/19, when a complete host name was
4020 given in a host list; looking up its IP address could give an abbreviated
4021 form, whereas the current host's name might or might not be abbreviated.
4022 The same fix has been applied.
4028 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4029 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4032 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4033 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4035 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4037 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4038 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4039 Also, for "Auto-Submitted", treat anything other than "no" as
4040 non-personal, in accordance with RFC 3834. (Previously it treated
4041 anything starting "auto-" as non-personal.)
4043 TF/01 The control=submission/name=... option had a problem with syntax
4044 errors if the name included a slash character. The /name= option
4045 now slurps the rest of the string, so it can include any characters
4046 but it must come last in the list of options (after /sender_retain
4049 PH/05 Some modifications to the interface to the fake nameserver for the new
4057 TK/01 Added the "success_on_redirect" address verification option. See
4058 NewStuff for rationale and an example.
4060 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4062 PH/02 Patch to exigrep to allow it to work on syslog lines.
4064 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4065 fread() to skip over the body file's header line, because in Cygwin the
4066 header line is locked and is inaccessible.
4068 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4069 co-exist for some time) to make it clear that it is the Exim ID that is
4070 referenced, not the Message-ID: header line.
4072 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4073 string_format() function, because snprintf() does not exist on all
4076 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4077 ${stat: expansion item.
4079 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4080 protocol synchronization error", to keep the pedants happy.
4082 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4083 well as for IRIX systems, when gcc is being used. See the host.c source
4086 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4088 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4091 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4092 transport and to the smtp transport in LMTP mode.
4094 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4096 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4097 run a filter in a subprocess. This could lead to confusion in subsequent
4098 lookups in the parent process. There should also be a search_tidyup() at
4099 the end of the subprocess.
4101 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4102 only if the host matched helo_try_verify_hosts, which caused the
4103 verification to occur when the EHLO/HELO command was issued. The ACL just
4104 tested the remembered result. Now, if a previous verification attempt has
4105 not happened, "verify = helo" does it there and then.
4107 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4109 TK/03 Fix log output including CR from clamd.
4111 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4112 exist provoked a memory error which could cause a segfault.
4114 PH/15 Installed PCRE 6.2
4116 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4118 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4119 of the problem. Specifically, suggested +O2 rather than +O1 for the
4122 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4124 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4125 record, the port was not correctly logged when the outgoing_port log
4126 selector was set (it logged the transort's default port).
4128 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4129 fallback_hosts, and "hosts" in the smtp transport.
4131 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4132 host errors such as "Connection refused".
4134 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4135 authentication with radiusclient 0.4.9:
4137 - Error returned from rc_read_config was caught wrongly
4138 - Username/password not passed on to radius server due to wrong length.
4140 The presumption is that some radiusclient API changes for 4.51/PH/17
4141 were not taken care of correctly. The code is still untested by me (my
4142 Linux distribution still has 0.3.2 of radiusclient), but it was
4143 contributed by a Radius user.
4145 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4146 expanding the "port" option of the smtp transport.
4148 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4149 while reading a MIME header. Thanks to Tom Hughes for a patch.
4151 PH/24 Include config.h inside local_scan.h so that configuration settings are
4154 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4155 that in an ACL for RCPT (for example), you can examine exactly what was
4158 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4159 commands, but it was not correctly comparing the address with the actual
4160 client host address. Thus, it would show the EHLO address in Received:
4161 header lines when this was not necessary.
4163 PH/27 Added the % operator to ${eval:}.
4165 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4166 it should be ignoring failures (because with -C, for example, it has lost
4167 privilege). It wasn't ignoring creation failures other than "already
4170 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4173 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4174 because an input line was too long, either on its own, or by virtue of
4175 too many continuations, the temporary file was not being removed, and the
4176 return code was incorrect.
4178 PH/31 Missing "BOOL" in function definition in filtertest.c.
4180 PH/32 Applied Sieve patches from the maintainer.
4182 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4184 PH/33 Added "verify = not_blind".
4186 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4187 Local/Makefile (with some defaults set). These are used in built scripts
4188 such as exicyclog, but they have never been used in the exim_install
4189 script (though there are many overriding facilities there). I have
4190 arranged that the exim_install script now takes note of these two
4193 PH/35 Installed configuration files for Dragonfly.
4195 PH/36 When a locally submitted message by a trusted user did not contain a
4196 From: header, and the sender address was obtained from -f or from an SMTP
4197 MAIL command, and the trusted user did not use -F to supply a sender
4198 name, $originator_name was incorrectly used when constructing a From:
4199 header. Furthermore, $originator_name was used for submission mode
4200 messages from external hosts without From: headers in a similar way,
4201 which is clearly wrong.
4203 PH/37 Added control=suppress_local_fixups.
4205 PH/38 When log_selector = +received_sender was set, and the addition of the
4206 sender made the log line's construction buffer exactly full, or one byte
4207 less than full, an overflow happened when the terminating "\n" was
4210 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4211 when the result of a list match is failure because a DNS lookup failed.
4213 PH/40 RM_COMMAND is now used in the building process.
4215 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4216 the "build-* directories that it finds.
4218 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4219 address in a domain literal was a prefix of an interface address.
4221 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4222 when verifying a sender address, unless rewrite_headers is false.
4224 PH/44 Wrote a long comment about why errors_to addresses are verified as
4225 recipients, not senders.
4227 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4228 the ratelimit ACL was added.
4230 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4232 PH/46 Added extra information about PostgreSQL errors to the error string.
4234 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4235 avoiding the need to install special zones in a real server. This is
4236 backwards compatible; if it can't find the fake resolver, it drops back.
4237 Thus, both old and new test suites can be run.
4239 TF/02 Added util/ratelimit.pl
4241 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4242 clock is set back in time.
4244 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4245 Candler <B.Candler@pobox.com>.
4247 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4248 OK for addresses that are the result of redirections.
4250 PH/48 A number of further additions for the benefit of the new test suite,
4251 including a fake gethostbyname() that interfaces to the fake DNS resolver
4254 TF/06 The fix for widen_domains has also been applied to qualify_single and
4255 search_parents which are the other dnslookup options that can cause
4258 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4261 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4263 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4264 service" if it encountered an MX record with an empty target hostname.
4265 The message is now "an MX or SRV record indicated no SMTP service".
4267 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4268 if the DNS of the sending site is misconfigured. This is quite a
4269 common situation. This change restores the behaviour of treating a
4270 helo verification defer as a failure.
4272 PH/51 If self=fail was set on a router, the bounce message did not include the
4273 actual error message.
4279 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4281 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4282 command itself ended in error, the underlying message about the transport
4283 filter timeout was being overwritten with the pipe command error. Now the
4284 underlying error message should be appended to the second error message.
4286 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4288 PH/02 Reduce the amount of output that "make" produces by default. Full output
4289 can still be requested.
4291 PH/03 The warning log line about a condition test deferring for a "warn" verb
4292 was being output only once per connection, rather than after each
4293 occurrence (because it was using the same function as for successful
4294 "warn" verbs). This seems wrong, so I have changed it.
4296 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4297 it should not have, which might have caused a crash in the right
4298 circumstances, but probably never did.
4300 PH/04 Installed a modified version of Tony Finch's patch to make submission
4301 mode fix the return path as well as the Sender: header line, and to
4302 add a /name= option so that you can make the user's friendly name appear
4305 TF/03 Added the control = fakedefer ACL modifier.
4307 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4308 Mark Lowes for thorough testing.
4310 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4312 TK/03 Merged latest SRS patch from Miles Wilton.
4314 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4315 with the definition in sysexits.h (which is #included earlier).
4316 Fortunately, Exim does not actually use EX_OK. The code used to try to
4317 preserve the sysexits.h value, by assuming that macro definitions were
4318 scanned for macro replacements. I have been disabused of this notion,
4319 so now the code just undefines EX_OK before #including unistd.h.
4321 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4322 in the smtp transport. When a block could not be written in a single
4323 write() function, the timeout was being re-applied to each part-write.
4324 This seems wrong - if the receiver was accepting one byte at a time it
4325 would take for ever. The timeout is now adjusted when this happens. It
4326 doesn't have to be particularly precise.
4328 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4329 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4331 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4332 without a domain if the check to <postmaster@domain> fails.
4334 SC/01 Eximstats: added -xls and the ability to specify output files
4335 (patch written by Frank Heydlauf).
4337 SC/02 Eximstats: use FileHandles for outputting results.
4339 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4341 SC/04 Eximstats: fixed display of large numbers with -nvr option
4343 SC/05 Eximstats: fixed merging of reports with empty tables.
4345 SC/06 Eximstats: added the -include_original_destination flag
4347 SC/07 Eximstats: removed tabs and trailing whitespace.
4349 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4351 TK/06 MBOX spool code: Add real "From " MBOX separator line
4352 so the .eml file is really in mbox format (even though
4353 most programs do not really care). Patch from Alex Miller.
4355 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4356 The latter is generated from $received_to and is only set if the
4357 message has one envelope recipient. SA can use these headers,
4358 obviously out-of-the-box. Patch from Alex Miller.
4360 PH/08 The ${def test on a variable was returning false if the variable's
4361 value was "0", contrary to what the specification has always said!
4362 The result should be true unless the variable is empty.
4364 PH/09 The syntax error of a character other than { following "${if
4365 def:variable_name" (after optional whitespace) was not being diagnosed.
4366 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4367 accidental colon was present, for example, could give incorrect results.
4369 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4370 result is used (not including appendfile, where other changes are about
4373 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4374 This involved changing a lot of size variables from int to off_t. It
4375 should work with maildirs and everything.
4377 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4378 spamd dying while we are connected to it.
4380 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4383 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4384 function for BDB 4.3.
4386 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4388 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4389 the sources for PCRE have been re-arranged and more files are now
4392 PH/15 The code I had for printing potentially long long variables in PH/11
4393 above was not the best (it lost precision). The length of off_t variables
4394 is now inspected at build time, and an appropriate printing format (%ld
4395 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4396 to be "long long int" or "long int". This is needed for the internal
4397 formatting function string_vformat().
4399 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4400 the configuration file to be ":syslog", then the script "guesses" where
4401 the logs files are, rather than using the compiled in default. In our
4402 case the guess is not the same as the compiled default, so the script
4403 suddenly stopped working when I started to use syslog. The patch checks
4404 to see if log_file_path is "". If so, it attempts to read it from exim
4405 with no configuration file to get the compiled in version, before it
4406 falls back to the previous guessing code."
4408 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4409 implementing BATV in an Exim configuration. See NewStuff for the gory
4412 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4413 Makefile that are specific to HP-UX.
4415 PH/18 If the "use_postmaster" option was set for a recipient callout together
4416 with the "random" option, the postmaster address was used as the MAIL
4417 FROM address for the random test, but not for the subsequent recipient
4418 test. It is now used for both.
4420 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4421 patch removes a few documentation additions to RFC 3028, because the
4422 latest draft now contains them. It adds the new en;ascii-case comparator
4423 and a new error check for 8bit text in MIME parts. Comparator and
4424 require names are now matched exactly. I enabled the subaddress
4425 extension, but it is not well tested yet (read: it works for me)."
4427 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4428 rework some of the code of TK/09 above to avoid the hardwired use of
4429 "%lld" and "long long". Replaced the call to snprintf() with a call to
4432 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4433 records point to non-existent hosts", "retry timeout exceeded", and
4434 "retry time not reached for any host after a long failure period".
4436 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4437 experimental DomainKeys support:
4439 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4440 (2) On an error such as an illegally used "control", the wrong name for
4441 the control was given.
4443 These problems did NOT occur unless DomainKeys support was compiled.
4445 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4447 PH/24 Added ${if match_ip condition.
4449 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4450 databases so that it will be absolutely obvious if a crash occurs in the
4451 DB library. This is a regular occurrence (often caused by mis-matched
4454 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4455 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4456 picked up on a user's system that detects such things. There doesn't seem
4457 to be a gcc warning option for this - only an attribute that has to be
4458 put on the function's prototype. It seems that in Fedora Core 4 they have
4459 set this on a number of new functions. No doubt there will be more in due
4462 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4463 specify a transport. However, if an address that was verified by such a
4464 router was the subject of a callout, Exim crashed because it tried to
4465 read the rcpt_include_affixes from the non-existent transport. Now it
4466 just assumes that the setting of that option is false. This bug was
4467 introduced by 4.51/PH/31.
4469 PH/28 Changed -d+all to exclude +memory, because that information is very
4470 rarely of interest, but it makes the output a lot bigger. People tend to
4471 do -d+all out of habit.
4473 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4474 code in os-type was giving problems when libc.so lives in lib64, like on
4477 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4478 aren't the modern standard, and it seems that some systems' include files
4479 don't always have them. Exim was already checking for some of the newer
4480 ones like T_AAAA, and defining it itself. I've added checks for all the
4481 record types that Exim uses.
4483 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4484 not automatically generating a new one, as it is supposed to. This
4485 prevented TLS from working. If the file did exist, but contained invalid
4486 data, a new version was generated, as expected. It was only the case of a
4487 non-existent file that was broken.
4489 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4490 with a change in libdomainkeys > 0.64.
4492 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4493 from DNS. If the selector record carries the flag, it now has
4494 precedence over the domain-wide flag.
4496 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4498 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4499 the use of a port name that isn't defined in /etc/services) occurred, the
4500 message was deferred as in a normal delivery, and thus remained on the
4501 spool, instead of being failed because of the mua_wrapper setting. This
4502 is now fixed, and I tidied up some of the mua_wrapper messages at the
4505 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4506 the messages in a hash of arrays rather than using individual hashes.
4507 This is a bit cleaner and results in dramatic memory savings, albeit
4508 at a slight CPU cost.
4510 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4511 as requested by Marc Sherman.
4513 SC/10 Eximstats: added histograms for user specified patterns as requested
4516 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4518 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4519 fopen() in the content-scanning modules that did not already have it.
4525 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4526 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4528 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4530 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4532 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4533 to test Sieve filters that use "vacation".
4535 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4536 that changes the way the GnuTLS parameters are stored in the cache file.
4537 The new format can be generated externally. For backward compatibility,
4538 if the data in the cache doesn't make sense, Exim assumes it has read an
4539 old-format file, and it generates new data and writes a new file. This
4540 means that you can't go back to an older release without removing the
4543 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4544 work if there are any delivery delays because "one_time" forces the
4545 parent to be marked "delivered", so its unseen clone is never tried
4546 again. For this reason, Exim now forbids the simultaneous setting of
4549 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4550 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4551 entry if you want to know the details. The fix, however, neglected to
4552 consider the case when local delivery batching is involved. The test for
4553 "previously delivered" was not happening when checking to see if an
4554 address could be batched with a previous (undelivered) one; under
4555 certain circumstances this could lead to multiple deliveries to the same
4558 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4559 in its include files, and this causes problems building Exim.
4561 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4562 header_syntax) but Exim was just ignoring anything given after a slash.
4563 In particular, this caused confusion with an attempt to use "verify =
4564 reverse_host_lookup/defer_ok". An error is now given when options are
4565 supplied for verify items that do not have them. (Maybe reverse_host_
4566 lookup should have a defer_ok option, but that's a different point.)
4568 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4569 defined by RFC 821) to 2048, because there were problems with some AUTH
4570 commands, and RFC 1869 says the size should be increased for extended
4571 SMTP commands that take arguments.
4573 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4576 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4577 "unknown" error; now it says that the functionality isn't in the binary.
4579 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4580 an address' error message when a string expansion fails (syntax or
4581 whatever). Otherwise the password may appear in the log. Following change
4582 PH/42 below, there is no longer a chance of it appearing in a bounce
4585 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4587 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4588 of its addresses was ever tried. (Bugzilla bug #2.)
4590 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4591 the result incorrectly in the debug output. (It correctly added a newline
4592 to what was transported.)
4594 TF/01 Added $received_time.
4596 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4597 commented out examples of how to interface to a virus scanner and to
4598 SpamAssassin. Also added commented examples of av_scanner and
4599 spamd_address settings.
4601 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4602 and controls are allowed in which ACLs. There were a couple of minor
4603 errors. Some of the entries in the conditions table (which is a table of
4604 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4605 negation of where the condition IS allowed.
4607 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4609 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4610 header file does not have a version number, so I've had to invent a new
4611 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4612 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4613 radiusclient), but it was contributed by a Radius user.
4615 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4616 files or directories, for OpenSSL.
4618 PH/19 When an Exim process that is running as root has to create an Exim log
4619 file, it does so in a subprocess that runs as exim:exim so as to get the
4620 ownership right at creation (otherwise, other Exim processes might see
4621 the file with the wrong ownership). There was no test for failure of this
4622 fork() call, which would lead to the process getting stuck as it waited
4623 for a non-existent subprocess. Forks do occasionally fail when resources
4624 run out. I reviewed all the other calls to fork(); they all seem to check
4627 PH/20 When checking for unexpected SMTP input at connect time (before writing
4628 the banner), Exim was not dealing correctly with a non-positive return
4629 from the read() function. If the client had disconnected by this time,
4630 the result was a log entry for a synchronization error with an empty
4631 string after "input=" when read() returned zero. If read() returned -1
4632 (an event I could not check), uninitialized data bytes were printed.
4633 There were reports of junk text (parts of files, etc) appearing after
4636 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4638 PH/22 Added support for macro redefinition, and (re)definition in between
4639 driver and ACL definitions.
4641 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4642 forgetting to use the resulting value; it was using the unexpanded value.
4644 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4645 hadn't been configured. The fix is from Juergen Kreileder, who
4646 understands it better than I do:
4648 "Here's what I see happening with three configured cyrus_sasl
4649 authenticators configured (plain, login, cram-md5):
4651 On startup auth_cyrus_sasl_init() gets called for each of these.
4652 This means three calls to sasl_listmech() without a specified mech_list.
4653 => SASL tests which mechs of all available mechs actually work
4654 => three warnings about OTP not working
4655 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4657 With the patch, sasl_listmech() also gets called three times. But now
4658 SASL's mech_list option is set to the server_mech specified in the the
4659 authenticator. Or in other words, the answer from sasl_listmech()
4660 gets limited to just the mech you're testing for (which is different
4662 => the return list contains just 'plain' or 'login', 'cram-md5' or
4663 nothing depending on the value of ob->server_mech.
4665 I've just tested the patch: Authentication still works fine,
4666 unavailable mechs specified in the exim configuration are still
4667 caught, and the auth.log warnings about OTP are gone."
4669 PH/25 When debugging is enabled, the contents of the command line are added
4670 to the debugging output, even when log_selector=+arguments is not
4673 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4674 answer is "GNU", and only if the return is "GNU/something" is the answer
4677 PH/27 $acl_verify_message is now set immediately after the failure of a
4678 verification in an ACL, and so is available in subsequent modifiers. In
4679 particular, the message can be preserved by coding like this:
4681 warn !verify = sender
4682 set acl_m0 = $acl_verify_message
4684 Previously, $acl_verify_message was set only while expanding "message"
4685 and "log_message" when a very denied access.
4687 PH/28 Modified OS/os.c-Linux with
4689 -#ifndef OS_LOAD_AVERAGE
4690 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4692 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4693 nomenclature these days.)
4695 PH/29 Installed patch from the Sieve maintainer that adds the options
4696 sieve_useraddress and sieve_subaddress to the redirect router.
4698 PH/30 In these circumstances:
4699 . Two addresses routed to the same list of hosts;
4700 . First host does not offer TLS;
4701 . First host accepts first address;
4702 . First host gives temporary error to second address;
4703 . Second host offers TLS and a TLS session is established;
4704 . Second host accepts second address.
4705 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4706 and peerdn, if requested) that were in fact used only for the second
4709 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4710 attention to any local part prefix or suffix that was matched by the
4711 router that accepted the address. It now behaves in the same way as it
4712 does for delivery: the affixes are removed from the local part unless
4713 rcpt_include_affixes is set on the transport.
4715 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4716 timeout during the DATA phase of an incoming message.
4718 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4719 applied a patch sanctioned by the Sieve maintainer.
4721 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4722 the uid or gid is negative. A case of a negative gid caused this to be
4723 noticed. The fix allows for either to be negative.
4725 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4726 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4729 PH/36 The change PH/12 above was broken. Fixed it.
4731 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4732 the grounds that routing the same address twice would always produce the
4733 same answer. This might have been true once, but it is certainly no
4734 longer true now. Routing a child address may depend on the previous
4735 routing that produced that child. Some complicated redirection strategies
4736 went wrong when messages had multiple recipients, and made Exim's
4737 behaviour dependent on the order in which the addresses were given.
4739 I have moved the duplicate checking until after the routing is complete.
4740 Exim scans the addresses that are assigned to local and remote
4741 transports, and removes any duplicates. This means that more work will be
4742 done, as duplicates will always all be routed, but duplicates are
4743 presumably rare, so I don't expect this is of any significance.
4745 For deliveries to pipes, files, and autoreplies, the duplicate checking
4746 still happens during the routing process, since they are not going to be
4749 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4750 It corrects a timeout issue with spamd. This is Ian's comment: "The
4751 background is that sometimes spamd either never reads data from a
4752 connection it has accepted, or it never writes response data. The exiscan
4753 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4754 blindly assumes that writes won't block so it may never time out."
4756 PH/39 Allow G after quota size as well as K and M.
4758 PH/40 The value set for $authenticated_id in an authenticator may not contain
4759 binary zeroes or newlines because the value is written to log lines and
4760 to spool files. There was no check on this. Now the value is run through
4761 the string_printing() function so that such characters are converted to
4762 printable escape sequences.
4764 PH/41 $message_linecount is a new variable that contains the total number of
4765 lines in the message. Compare $body_linecount, which is the count for the
4768 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4769 bounce and delay warning messages, except in certain special cases, which
4772 (a) An SMTP error message from a remote host;
4773 (b) A message specified in a :fail: redirection;
4774 (c) A message specified in a "fail" command in a system filter;
4775 (d) A message specified in a FAIL return from the queryprogram router;
4776 (e) A message specified by the cannot_route_message router option.
4778 In these cases only, Exim does include the error details in bounce and
4779 warning messages. There are also a few cases where bland messages such
4780 as "unrouteable address" or "local delivery error" are given.
4782 PH/43 $value is now also set for the "else" part of a ${run expansion.
4784 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4785 being worked on, but at least Exim now implements the latest version to
4788 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4789 process to complete was treated as a delivery failure, a timeout while
4790 writing the message to the pipe was logged, but erroneously treated as a
4791 successful delivery. Such timeouts include transport filter timeouts. For
4792 consistency with the overall process timeout, these timeouts are now
4793 treated as errors, giving rise to delivery failures by default. However,
4794 there is now a new Boolean option for the pipe transport called
4795 timeout_defer, which, if set TRUE, converts the failures into defers for
4796 both kinds of timeout. A transport filter timeout is now identified in
4799 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4800 systems where "make" and "gmake" are different, calling "gmake" at top
4801 level broke things. I've arranged for the value of $(MAKE) to be passed
4802 from the Makefile to this script so that it can call the same version of
4806 A note about Exim versions 4.44 and 4.50
4807 ----------------------------------------
4809 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4810 changes of various kinds. As a consequence, a big documentation update was
4811 needed. This delayed the release for rather longer than seemed good, especially
4812 in the light of a couple of (minor) security issues. Therefore, the changes
4813 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4814 release. So 4.44 and 4.50 are in effect two different branches that both start
4817 I have left the 4.50 change log unchanged; it contains all the changes since
4818 4.43. The change log for 4.44 is below; many of its items are identical to
4819 those for 4.50. This seems to be the most sensible way to preserve the
4820 historical information.
4826 1. Minor wording change to the doc/README.SIEVE file.
4828 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4829 computation of the current number of files was incorrect.
4831 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4832 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4835 4. Give more explanation in the error message when the command for a transport
4836 filter fails to execute.
4838 5. There are several places where Exim runs a non-Exim command in a
4839 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4840 was being done only for the command run by the queryprogram router. It is
4841 now done for all such subprocesses. The other cases are: ${run, transport
4842 filters, and the commands run by the lmtp and pipe transports.
4844 6. Added CONFIGURE_GROUP build-time option.
4846 7. Some older OS have a limit of 256 on the maximum number of file
4847 descriptors. Exim was using setrlimit() to set 1000 as a large value
4848 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4849 systems. I've change it so that if it can't get 1000, it tries for 256.
4851 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4852 was an oversight, and furthermore, ever since the addition of extra
4853 controls (e.g. 4.43/32), the checks on when to allow different forms of
4854 "control" were broken. There should now be diagnostics for all cases when a
4855 control that does not make sense is encountered.
4857 9. Added the /retain_sender option to "control=submission".
4859 10. $recipients is now available in the predata ACL (oversight).
4861 11. Tidy the search cache before the fork to do a delivery from a message
4862 received from the command line. Otherwise the child will trigger a lookup
4863 failure and thereby defer the delivery if it tries to use (for example) a
4864 cached ldap connection that the parent has called unbind on.
4866 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4867 of $address_data from the recipient verification was clobbered by the
4868 sender verification.
4870 13. The value of address_data from a sender verification is now available in
4871 $sender_address_data in subsequent conditions in the ACL statement.
4873 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4875 15. Added a new option "connect=<time>" to callout options, to set a different
4878 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4879 was its contents. (It was OK if the option was not defined at all.)
4881 17. A "Completed" log line is now written for messages that are removed from
4882 the spool by the -Mrm option.
4884 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4885 information about exactly what failed.
4887 19. Added -dd to debug only the daemon process.
4889 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4890 handles timeouts, both on the server side and network timeouts. Renamed the
4891 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4893 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4894 It is now set to "smtps".
4896 22. $host_address is now set to the target address during the checking of
4897 ignore_target_hosts.
4899 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4900 being passed; this would have caused $sender_host_name to have been used if
4901 matching the list had actually called for a host name (not very likely,
4902 since this list is usually IP addresses). A host name is now passed as
4905 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4906 code that specifies a non-restarting handler (typically sigaction() in
4907 modern systems) in an attempt to fix a rare and obscure crash bug.
4909 25. Narrowed the window for a race in the daemon that could cause it to ignore
4910 SIGCHLD signals. This is not a major problem, because they are used only to
4911 wake it up if nothing else does.
4913 26. A malformed maildirsize file could cause Exim to calculate negative values
4914 for the mailbox size or file count. Odd effects could occur as a result.
4915 The maildirsize information is now recalculated if the size or filecount
4918 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4919 support for a long time. Removed HAVE_SYS_VFS_H.
4921 28. Installed the latest version of exipick from John Jetmore.
4923 29. In an address list, if the pattern was not a regular expression, an empty
4924 subject address (from a bounce message) matched only if the pattern was an
4925 empty string. Non-empty patterns were not even tested. This was the wrong
4926 because it is perfectly reasonable to use an empty address as part of a
4927 database query. An empty address is now tested by patterns that are
4928 lookups. However, all the other forms of pattern expect the subject to
4929 contain a local part and a domain, and therefore, for them, an empty
4930 address still always fails if the pattern is not itself empty.
4932 30. Exim went into a mad DNS loop when attempting to do a callout where the
4933 host was specified on an smtp transport, and looking it up yielded more
4934 than one IP address.
4936 31. Re-factored the code for checking spool and log partition space into a
4937 function that finds that data and another that does the check. The former
4938 is then used to implement four new variables: $spool_space, $log_space,
4939 $spool_inodes, and $log_inodes.
4941 32. The RFC2047 encoding function was originally intended for short strings
4942 such as real names; it was not keeping to the 75-character limit for
4943 encoded words that the RFC imposes. It now respects the limit, and
4944 generates multiple encoded words if necessary. To be on the safe side, I
4945 have increased the buffer size for the ${rfc2047: expansion operator from
4948 33. It is now permitted to omit both strings after an "if" condition; if the
4949 condition is true, the result is "true". As before, when the second string
4950 is omitted, a false condition yields an empty string. This makes it less
4951 cumbersome to write custom ACL and router conditions.
4953 34. Failure to deliver a bounce message always caused it to be frozen, even if
4954 there was an errors_to setting on the router. The errors_to setting is now
4957 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4958 canonical form (fully expanded) before being placed in
4959 $sender_host_address.
4961 36. The table in the code that translates DNS record types into text (T_A to
4962 "A" for instance) was missing entries for NS and CNAME. It is just possible
4963 that this could have caused confusion if both these types were looked up
4964 for the same domain, because the text type is used as part of Exim's
4965 per-process caching. But the chance of anyone hitting this buglet seems
4968 37. The dnsdb lookup has been extended in a number of ways.
4970 (1) There is a new type, "zns", which walks up the domain tree until it
4971 finds some nameserver records. It should be used with care.
4973 (2) There is a new type, "mxh", which is like "mx" except that it returns
4974 just the host names, not the priorities.
4976 (3) It is now possible to give a list of domains (or IP addresses) to be
4977 looked up. The behaviour when one of the lookups defers can be
4978 controlled by a keyword.
4980 (4) It is now possible to specify the separator character for use when
4981 multiple records are returned.
4983 38. The dnslists ACL condition has been extended: it is now possible to supply
4984 a list of IP addresses and/or domains to be looked up in a particular DNS
4987 39. Added log_selector=+queue_time_overall.
4989 40. When running the queue in the test harness, wait just a tad after forking a
4990 delivery process, to get repeatability of debugging output.
4992 41. Include certificate and key file names in error message when GnuTLS fails
4993 to set them up, because the GnuTLS error message doesn't include the name
4994 of the failing file when there is a problem reading it.
4996 42. Allow both -bf and -bF in the same test run.
4998 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5000 44. The "Exiscan patch" is now merged into the mainline Exim source.
5002 45. Sometimes the final signoff response after QUIT could fail to get
5003 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5004 < 0 before doing a fflush(). This bug looks as though it goes back to the
5005 introduction of TLS in release 3.20, but "sometimes" must have been rare
5006 because the tests only now provoked it.
5008 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5009 (this can affect the format of dates).
5011 47. exim_tidydb, when checking for the continued existence of a message for
5012 which it has found a message-specific retry record, was not finding
5013 messages that were in split spool directories. Consequently, it was
5014 deleting retry records that should have stayed in existence.
5016 48. Steve fixed some bugs in eximstats.
5018 49. The SPA authentication driver was not abandoning authentication and moving
5019 on to the next authenticator when an expansion was forced to fail,
5020 contradicting the general specification for all authenticators. Instead it
5021 was generating a temporary error. It now behaves as specified.
5023 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5024 (the order specifies the preference for clients). The order is now AES256,
5025 AES128, 3DES, ARCFOUR128.
5027 51. Small patch to Sieve code - explicitly set From: when generating an
5030 52. Exim crashed if a remote delivery caused a very long error message to be
5031 recorded - for instance if somebody sent an entire SpamAssassin report back
5032 as a large number of 550 error lines. This bug was coincidentally fixed by
5033 increasing the size of one of Exim's internal buffers (big_buffer) that
5034 happened as part of the Exiscan merge. However, to be on the safe side, I
5035 have made the code more robust (and fixed the comments that describe what
5038 53. Now that there can be additional text after "Completed" in log lines (if
5039 the queue_time_overall log selector is set), a one-byte patch to exigrep
5040 was needed to allow it to recognize "Completed" as not the last thing in
5043 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5044 patch that reportedly fixes this has been added. I am not expert enough to
5045 create a test for it. This is what the patch creator wrote:
5047 "I found a little strange behaviour of ldap code when working with
5048 Windows 2003 AD Domain, where users was placed in more than one
5049 Organization Units. When I tried to give exim partial DN, the exit code
5050 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5051 But simultaneously result of request was absolutely normal ldap result,
5052 so I produce this patch..."
5054 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5055 REFERENCE, so I have modified the code to exclude the patch when that macro
5058 55. Some experimental protocols are using DNS PTR records for new purposes. The
5059 keys for these records are domain names, not reversed IP addresses. The
5060 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5061 leaves it alone. Component reversal etc. now happens only for IP addresses.
5064 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5066 57. Double the size of the debug message buffer (to 2048) so that more of very
5067 long debug lines gets shown.
5069 58. The exicyclog utility now does better if the number of log files to keep
5070 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5072 59. Two changes related to the smtp_active_hostname option:
5074 (1) $smtp_active_hostname is now available as a variable.
5075 (2) The default for smtp_banner uses $smtp_active_hostname instead
5076 of $primary_hostname.
5078 60. The host_aton() function is supposed to be passed a string that is known
5079 to be a valid IP address. However, in the case of IPv6 addresses, it was
5080 not checking this. This is a hostage to fortune. Exim now panics and dies
5081 if the condition is not met. A case was found where this could be provoked
5082 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5083 components; fortuitously, this particular loophole had already been fixed
5084 by change 4.50/55 above.
5086 If there are any other similar loopholes, the new check in host_aton()
5087 itself should stop them being exploited. The report I received stated that
5088 data on the command line could provoke the exploit when Exim was running as
5089 exim, but did not say which command line option was involved. All I could
5090 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5091 running as the user.
5094 61. There was a buffer overflow vulnerability in the SPA authentication code
5095 (which came originally from the Samba project). I have added a test to the
5096 spa_base64_to_bits() function which I hope fixes it.
5099 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5100 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5102 63. The daemon start-up calls getloadavg() while still root for those OS that
5103 need the first call to be done as root, but it missed one case: when
5104 deliver_queue_load_max is set with deliver_drop_privilege. This is
5105 necessary for the benefit of the queue runner, because there is no re-exec
5106 when deliver_drop_privilege is set.
5108 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5109 This has been fixed.
5111 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5112 was in use, was not putting the data itself into the right store pool;
5113 consequently, it could be overwritten for a subsequent message in the same
5114 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5117 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5119 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5120 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5121 the function were treating the return as a boolean value, which happened to
5122 work because 0=false and not-0=true, but is not correct code.
5124 68. The host_aton() function was not handling scoped IPv6 addresses (those
5125 with, for example, "%eth0" on the end) correctly.
5127 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5128 negated items (that is, ~something) in unsigned ints. Some compilers
5129 apparently mutter when there is no cast.
5131 70. If an address verification called from an ACL failed, and did not produce a
5132 user-specific message (i.e. there was only a "system" message), nothing was
5133 put in $acl_verify_message. In this situation, it now puts the system
5136 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5137 session; change 4.31/43 added the unwanted input to the log line - except
5138 that it did not do this in the start of session case. It now does.
5140 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5141 This is wrong and can cause the other end to generate a synchronization
5142 error if it is another Exim or anything else that does the synchronization
5143 check. A QUIT command is no longer sent after a timeout.
5145 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5146 during host lookups.
5148 74. The defer_ok option of callout verification was not working if it was used
5149 when verifying addresses in header lines, that is, for this case:
5151 verify = header_sender/callout=defer_ok
5153 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5154 those file descriptors could be used for SMTP connections. If anything
5155 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5156 could be sent to the SMTP client, causing chaos. The daemon now opens
5157 stdin, stdout, and stderr to /dev/null when it puts itself into the
5160 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5161 log by default. The user can override this with suitable Perl magic.
5163 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5164 the log message when discard triggers, was not working for the DATA ACL or
5165 for the non-SMTP ACL.
5167 78. Error message wording change in sieve.c.
5169 79. If smtp_accept_max_per_host was set, the number of connections could be
5170 restricted to fewer than expected, because the daemon was trying to set up
5171 a new connection before checking whether the processes handling previous
5172 connections had finished. The check for completed processes is now done
5173 earlier. On busy systems, this bug wouldn't be noticed because something
5174 else would have woken the daemon, and it would have reaped the completed
5177 80. If a message was submitted locally by a user whose login name contained one
5178 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5179 It caused a spool format error. I have fixed the spool reading code. A
5180 related problem was that the "from" clause in the Received: line became
5181 illegal because of the space(s). It is now covered by ${quote_local_part.
5183 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5186 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5188 83. Patch from Sieve maintainer to fix unterminated string problem in
5189 "vacation" handling.
5191 84. Some minor changes to the Linux configuration files to help with other
5192 OS variants using glibc.
5194 85. One more patch for Sieve to update vacation handling to latest spec.
5197 ----------------------------------------------------
5198 See the note above about the 4.44 and 4.50 releases.
5199 ----------------------------------------------------
5205 1. Change 4.43/35 introduced a bug that caused file counts to be
5206 incorrectly computed when quota_filecount was set in an appendfile
5209 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5210 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5213 3. Give more explanation in the error message when the command for a transport
5214 filter fails to execute.
5216 4. There are several places where Exim runs a non-Exim command in a
5217 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5218 was being done only for the command run by the queryprogram router. It is
5219 now done for all such subprocesses. The other cases are: ${run, transport
5220 filters, and the commands run by the lmtp and pipe transports.
5222 5. Some older OS have a limit of 256 on the maximum number of file
5223 descriptors. Exim was using setrlimit() to set 1000 as a large value
5224 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5225 systems. I've change it so that if it can't get 1000, it tries for 256.
5227 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5228 was an oversight, and furthermore, ever since the addition of extra
5229 controls (e.g. 4.43/32), the checks on when to allow different forms of
5230 "control" were broken. There should now be diagnostics for all cases when a
5231 control that does not make sense is encountered.
5233 7. $recipients is now available in the predata ACL (oversight).
5235 8. Tidy the search cache before the fork to do a delivery from a message
5236 received from the command line. Otherwise the child will trigger a lookup
5237 failure and thereby defer the delivery if it tries to use (for example) a
5238 cached ldap connection that the parent has called unbind on.
5240 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5241 of $address_data from the recipient verification was clobbered by the
5242 sender verification.
5244 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5245 was its contents. (It was OK if the option was not defined at all.)
5247 11. A "Completed" log line is now written for messages that are removed from
5248 the spool by the -Mrm option.
5250 12. $host_address is now set to the target address during the checking of
5251 ignore_target_hosts.
5253 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5254 being passed; this would have caused $sender_host_name to have been used if
5255 matching the list had actually called for a host name (not very likely,
5256 since this list is usually IP addresses). A host name is now passed as
5259 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5260 code that specifies a non-restarting handler (typically sigaction() in
5261 modern systems) in an attempt to fix a rare and obscure crash bug.
5263 15. Narrowed the window for a race in the daemon that could cause it to ignore
5264 SIGCHLD signals. This is not a major problem, because they are used only to
5265 wake it up if nothing else does.
5267 16. A malformed maildirsize file could cause Exim to calculate negative values
5268 for the mailbox size or file count. Odd effects could occur as a result.
5269 The maildirsize information is now recalculated if the size or filecount
5272 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5273 support for a long time. Removed HAVE_SYS_VFS_H.
5275 18. Updated exipick to current release from John Jetmore.
5277 19. Allow an empty sender to be matched against a lookup in an address list.
5278 Previously the only cases considered were a regular expression, or an
5281 20. Exim went into a mad DNS lookup loop when doing a callout where the
5282 host was specified on the transport, if the DNS lookup yielded more than
5285 21. The RFC2047 encoding function was originally intended for short strings
5286 such as real names; it was not keeping to the 75-character limit for
5287 encoded words that the RFC imposes. It now respects the limit, and
5288 generates multiple encoded words if necessary. To be on the safe side, I
5289 have increased the buffer size for the ${rfc2047: expansion operator from
5292 22. Failure to deliver a bounce message always caused it to be frozen, even if
5293 there was an errors_to setting on the router. The errors_to setting is now
5296 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5297 canonical form (fully expanded) before being placed in
5298 $sender_host_address.
5300 24. Updated eximstats to version 1.33
5302 25. Include certificate and key file names in error message when GnuTLS fails
5303 to set them up, because the GnuTLS error message doesn't include the name
5304 of the failing file when there is a problem reading it.
5306 26. Expand error message when OpenSSL has problems setting up cert/key files.
5309 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5310 (this can affect the format of dates).
5312 28. exim_tidydb, when checking for the continued existence of a message for
5313 which it has found a message-specific retry record, was not finding
5314 messages that were in split spool directories. Consequently, it was
5315 deleting retry records that should have stayed in existence.
5317 29. eximstats updated to version 1.35
5318 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5319 1.35 - bugfix such that pie charts by volume are generated correctly
5321 30. The SPA authentication driver was not abandoning authentication and moving
5322 on to the next authenticator when an expansion was forced to fail,
5323 contradicting the general specification for all authenticators. Instead it
5324 was generating a temporary error. It now behaves as specified.
5326 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5327 (the order specifies the preference for clients). The order is now AES256,
5328 AES128, 3DES, ARCFOUR128.
5330 31. Small patch to Sieve code - explicitly set From: when generating an
5333 32. Exim crashed if a remote delivery caused a very long error message to be
5334 recorded - for instance if somebody sent an entire SpamAssassin report back
5335 as a large number of 550 error lines. This bug was coincidentally fixed by
5336 increasing the size of one of Exim's internal buffers (big_buffer) that
5337 happened as part of the Exiscan merge. However, to be on the safe side, I
5338 have made the code more robust (and fixed the comments that describe what
5341 33. Some experimental protocols are using DNS PTR records for new purposes. The
5342 keys for these records are domain names, not reversed IP addresses. The
5343 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5344 leaves it alone. Component reversal etc. now happens only for IP addresses.
5347 34. The host_aton() function is supposed to be passed a string that is known
5348 to be a valid IP address. However, in the case of IPv6 addresses, it was
5349 not checking this. This is a hostage to fortune. Exim now panics and dies
5350 if the condition is not met. A case was found where this could be provoked
5351 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5352 components; fortuitously, this particular loophole had already been fixed
5353 by change 4.50/55 or 4.44/33 above.
5355 If there are any other similar loopholes, the new check in host_aton()
5356 itself should stop them being exploited. The report I received stated that
5357 data on the command line could provoke the exploit when Exim was running as
5358 exim, but did not say which command line option was involved. All I could
5359 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5360 running as the user.
5363 35. There was a buffer overflow vulnerability in the SPA authentication code
5364 (which came originally from the Samba project). I have added a test to the
5365 spa_base64_to_bits() function which I hope fixes it.
5368 36. The daemon start-up calls getloadavg() while still root for those OS that
5369 need the first call to be done as root, but it missed one case: when
5370 deliver_queue_load_max is set with deliver_drop_privilege. This is
5371 necessary for the benefit of the queue runner, because there is no re-exec
5372 when deliver_drop_privilege is set.
5374 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5375 was in use, was not putting the data itself into the right store pool;
5376 consequently, it could be overwritten for a subsequent message in the same
5377 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5380 38. Sometimes the final signoff response after QUIT could fail to get
5381 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5382 < 0 before doing a fflush(). This bug looks as though it goes back to the
5383 introduction of TLS in release 3.20, but "sometimes" must have been rare
5384 because the tests only now provoked it.
5390 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5391 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5392 Now it returns an integer. A number of calls were still expecting a T/F
5393 return. Fortuitously, in all cases, the tests worked in OK situations,
5394 which is the norm. However, things would have gone wrong on any write
5395 failures on the smtp file descriptor. This function is used when sending
5396 messages over SMTP and also when doing verify callouts.
5398 2. When Exim is called to do synchronous delivery of a locally submitted
5399 message (the -odf or -odi options), it no longer closes stderr before doing
5402 3. Implemented the mua_wrapper option.
5404 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5406 5. Implemented the functions header_remove(), header_testname(),
5407 header_add_at_position(), and receive_remove_recipient(), and exported them
5410 6. If an ACL "warn" statement specified the addition of headers, Exim already
5411 inserted X-ACL-Warn: at the start if there was no header name. However, it
5412 was not making this test for the second and subsequent header lines if
5413 there were newlines in the string. This meant that an invalid header could
5414 be inserted if Exim was badly configured.
5416 7. Allow an ACL "warn" statement to add header lines at the start or after all
5417 the Received: headers, as well as at the end.
5419 8. Added the rcpt_4xx retry error code.
5421 9. Added postmaster_mailfrom=xxx to callout verification option.
5423 10. Added mailfrom=xxxx to the callout verification option, for verify=
5426 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5427 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5429 12. Inserted some casts to stop certain compilers warning when using pointer
5430 differences as field lengths or precisions in printf-type calls (mostly
5431 affecting debugging statements).
5433 13. Added optional readline() support for -be (dynamically loaded).
5435 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5436 same clock tick as a message's arrival, so that its received time was the
5437 same as the "first fail" time on the retry record, and that message
5438 remained on the queue past the ultimate address timeout, every queue runner
5439 would try a delivery (because it was past the ultimate address timeout) but
5440 after another failure, the ultimate address timeout, which should have then
5441 bounced the address, did not kick in. This was a "< instead of <=" error;
5442 in most cases the first failure would have been in the next clock tick
5443 after the received time, and all would be well.
5445 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5446 being recognized when the domain list was tested by the match_domain
5447 condition in an expansion string.
5449 16. Added the ${str2b64: operator.
5451 17. Exim was always calling setrlimit() to set a large limit for the number of
5452 processes, without checking whether the existing limit was already
5453 adequate. (It did check for the limit on file descriptors.) Furthermore,
5454 errors from getrlimit() and setrlimit() were being ignored. Now they are
5455 logged to the main and panic logs, but Exim does carry on, to try to do its
5456 job under whatever limits there are.
5458 18. Imported PCRE 5.0.
5460 19. Trivial typo in log message " temporarily refused connection" (the leading
5463 20. If the log selector return_path_on_delivery was set and an address was
5464 redirected to /dev/null, the delivery process crashed because it assumed
5465 that a return path would always be set for a "successful" delivery. In this
5466 case, the whole delivery is bypassed as an optimization, and therefore no
5469 21. Internal re-arrangement: the function for sending a challenge and reading
5470 a response while authentication was assuming a zero-terminated challenge
5471 string. It's now changed to take a pointer and a length, to allow for
5472 binary data in such strings.
5474 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5476 23. Exim was not respecting finduser_retries when seeking the login of the
5477 uid under which it was called; it was always trying 10 times. (The default
5478 setting of finduser_retries is zero.) Also, it was sleeping after the final
5479 failure, which is pointless.
5481 24. Implemented tls_on_connect_ports.
5483 25. Implemented acl_smtp_predata.
5485 26. If the domain in control=submission is set empty, Exim assumes that the
5486 authenticated id is a complete email address when it generates From: or
5487 Sender: header lines.
5489 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5490 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5491 chown and chgrp in /bin and hostname in /usr/bin.
5493 28. Exim was keeping the "process log" file open after each use, just as it
5494 does for the main log. This opens the possibility of it remaining open for
5495 long periods when the USR1 signal hits a daemon. Occasional processlog
5496 errors were reported, that could have been caused by this. Anyway, it seems
5497 much more sensible not to leave this file open at all, so that is what now
5500 29. The long-running daemon process does not normally write to the log once it
5501 has entered its main loop, and it closes the log before doing so. This is
5502 so that log files can straightforwardly be renamed and moved. However,
5503 there are a couple of unusual error situations where the daemon does write
5504 log entries, and I had neglected to close the log afterwards.
5506 30. The text of an SMTP error response that was received during a remote
5507 delivery was being truncated at 512 bytes. This is too short for some of
5508 the long messages that one sometimes sees. I've increased the limit to
5511 31. It is now possible to make retry rules that apply only when a message has a
5512 specific sender, in particular, an empty sender.
5514 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5515 it possible to be selective about when SMTP synchronization is enforced.
5517 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5519 32. Implemented hosts_connection_nolog.
5521 33. Added an ACL for QUIT.
5523 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5526 35. Added mailbox_size and mailbox_filecount to appendfile.
5528 36. Added control = no_multiline_responses to ACLs.
5530 37. There was a bug in the logic of the code that waits for the clock to tick
5531 in the case where the clock went backwards by a substantial amount such
5532 that the microsecond fraction of "now" was more than the microsecond
5533 fraction of "then" (but the whole seconds number was less).
5535 38. Added support for the libradius Radius client library this is found on
5536 FreeBSD (previously only the radiusclient library was supported).
5542 1. When certain lookups returned multiple values in the form name=value, the
5543 quoting of the values was not always being done properly. Specifically:
5544 (a) If the value started with a double quote, but contained no whitespace,
5546 (b) If the value contained whitespace other than a space character (i.e.
5547 tabs or newlines or carriage returns) it was not quoted.
5548 This fix has been applied to the mysql and pgsql lookups by writing a
5549 separate quoting function and calling it from the lookup code. The fix
5550 should probably also be applied to nisplus, ibase and oracle lookups, but
5551 since I cannot test any of those, I have not disturbed their existing code.
5553 2. A hit in the callout cache for a specific address caused a log line with no
5554 reason for rejecting RCPT. Now it says "Previous (cached) callout
5555 verification failure".
5557 3. There was an off-by-one bug in the queryprogram router. An over-long
5558 return line was truncated at 256 instead of 255 characters, thereby
5559 overflowing its buffer with the terminating zero. As well as fixing this, I
5560 have increased the buffer size to 1024 (and made a note to document this).
5562 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5563 when Exim is waiting for an SMTP response from a remote server, Exim
5564 restarts its select() call on the socket, thereby resetting its timeout.
5565 This is not a problem when such interrupts are rare. Somebody set up a cron
5566 job to run exiwhat every 2 minutes, which is less than the normal select()
5567 timeout (5 or 10 minutes). This meant that the select() timeout never
5568 kicked in because it was always reset. I have fixed this by comparing the
5569 time when an interrupt arrives with the time at the start of the first call
5570 to select(). If more time than the timeout has elapsed, the interrupt is
5571 treated as a timeout.
5573 5. Some internal re-factoring in preparation for the addition of Sieve
5574 extensions (by MH). In particular, the "personal" test is moved to a
5575 separate function, and given an option for scanning Cc: and Bcc: (which is
5576 not set for Exim filters).
5578 6. When Exim created an email address using the login of the caller as the
5579 local part (e.g. when creating a From: or Sender: header line), it was not
5580 quoting the local part when it contained special characters such as @.
5582 7. Installed new OpenBSD configuration files.
5584 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5585 try to make them clearer.
5587 9. Callout options, other than the timeout value, were being ignored when
5588 verifying sender addresses in header lines. For example, when using
5590 verify = header_sender/callout=no_cache
5592 the cache was (incorrectly) being used.
5594 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5595 only the Cygwin environment.
5597 11. When return_path_on_delivery was set as a log selector, if different remote
5598 addresses in the same message used different return paths and parallel
5599 remote delivery occurred, the wrong values would sometimes be logged.
5600 (Whenever a remote delivery process finished, the return path value from
5601 the most recently started remote delivery process was logged.)
5603 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5604 lines when AUTH and/or TLS are in use. This is the "received protocol"
5605 field. Exim used to use "asmtp" for authenticated SMTP, without any
5606 indication (in the protocol name) for TLS use. Now it follows the RFC and
5607 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5608 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5609 names appear in log lines as well as in Received: header lines.
5611 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5612 extensions, and comparison tests, and to fix some bugs.
5614 14. Changes to the "personal" filter test:
5616 (1) The test was buggy in that it was just doing the equivalent of
5617 "contains" tests on header lines. For example, if a user's address was
5618 anne@some.where, the "personal" test would incorrectly be true for
5620 To: susanne@some.where
5622 This test is now done by extracting each address from the header in turn,
5623 and checking the entire address. Other tests that are part of "personal"
5624 are now done using regular expressions (for example, to check local parts
5625 of addresses in From: header lines).
5627 (2) The list of non-personal local parts in From: addresses has been
5628 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5629 taken from the Sieve specification recommendations.
5631 (3) If the message contains any header line starting with "List-" it is
5632 treated as non-personal.
5634 (4) The test for "circular" in the Subject: header line has been removed
5635 because it now seems ill-conceived.
5637 15. Minor typos in src/EDITME comments corrected.
5639 16. Installed latest exipick from John Jetmore.
5641 17. If headers_add on a router specified a text string that was too long for
5642 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5643 of string_sprintf() is now avoided.
5645 18. $message_body_size was not set (it was always zero) when running the DATA
5646 ACL and the local_scan() function.
5648 19. For the "mail" command in an Exim filter, no default was being set for
5649 the once_repeat time, causing a random time value to be used if "once" was
5650 specified. (If the value happened to be <= 0, no repeat happened.) The
5651 default is now 0s, meaning "never repeat". The "vacation" command was OK
5652 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5653 (I found it when inspecting the code).
5655 20. There is now an overall timeout for performing a callout verification. It
5656 defaults to 4 times the callout timeout, which applies to individual SMTP
5657 commands during the callout. The overall timeout applies when there is more
5658 than one host that can be tried. The timeout is checked before trying the
5659 next host. This prevents very long delays if there are a large number of
5660 hosts and all are timing out (e.g. when the network connections are timing
5661 out). The value of the overall timeout can be changed by specifying an
5662 additional sub-option for "callout", called "maxwait". For example:
5664 verify = sender/callout=5s,maxwait=20s
5666 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5667 to the end before writing, but this should make it even safer).
5669 22. Exim was forgetting that it had advertised PIPELINING for the second and
5670 subsequent messages on an SMTP connection. It was also not resetting its
5671 memory on STARTTLS and an internal HELO.
5673 23. When Exim logs an SMTP synchronization error within a session, it now
5674 records whether PIPELINING has been advertised or not.
5676 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5677 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5678 rather than long int.
5680 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5682 26. Added the never_mail option to autoreply.
5688 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5689 crash if the getsockname() call failed; this can happen if a connection is
5690 closed very soon after it is established. The problem was simply in the
5691 order in which certain operations were done, causing Exim to try to write
5692 to the SMTP stream before it had set up the file descriptor. The bug has
5693 been fixed by making things happen in the correct order.
5699 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5700 before the connection was closed, thus losing the rejection response.
5702 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5703 some early Solaris releases, but causes trouble in current releases where
5704 socklen_t is defined.
5706 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5709 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5712 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5713 that releasing the top of it at the end releases what was used for sub-
5714 expansions (unless the block got too big). However, discard this block if
5715 the first thing is a variable or header, so that we can use its block when
5716 it is dynamic (useful for very large $message_headers, for example).
5718 6. Lookups now cache *every* query, not just the most recent. A new, separate
5719 store pool is used for this. It can be recovered when all lookup caches are
5720 flushed. Lookups now release memory at the end of their result strings.
5721 This has involved some general refactoring of the lookup sources.
5723 7. Some code has been added to the store_xxx() functions to reduce the amount
5724 of flapping under certain conditions.
5726 8. log_incoming_interface used to affect only the <= reception log lines. Now
5727 it causes the local interface and port to be added to several more SMTP log
5728 lines, for example "SMTP connection from", and rejection lines.
5730 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5732 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5734 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5735 could be overwritten at the end of the current message (or the start of a
5736 new message if it was set in a HELO ACL). The value is now preserved for
5737 the duration of the SMTP connection.
5739 12. If a transport had a headers_rewrite setting, and a matching header line
5740 contained an unqualified address, that address was qualified, even if it
5741 did not match any rewriting rules. The underlying bug was that the values
5742 of the flags that permit the existence of unqualified sender and recipient
5743 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5744 non-local messages, and by -bnq for local messages) were not being
5745 preserved with the message after it was received.
5747 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5748 "next input=" as part of the text comprising the host identity instead of
5749 the correct text. The code was using the same buffer for two different
5750 strings. However, depending on which order the printing function evaluated
5751 its arguments, the bug did not always show up. Under Linux, for example, my
5752 test suite worked just fine.
5754 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5755 doesn't work with some older versions of Perl. It has been changed to "my",
5756 which in any case is probably the better facility to use.
5758 15. A really picky compiler found some instances of statements for creating
5759 error messages that either had too many or two few arguments for the format
5762 16. The size of the buffer for calls to the DNS resolver has been increased
5763 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5764 for addresses that have a lot of PTR records. This alleviates a problem; it
5765 does not fully solve it.
5767 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5768 buffer now truncates the list and logs the incident, which is the same
5769 action as happens when Exim is looking up a host name and its aliases.
5770 Previously in this situation something unpredictable would happen;
5771 sometimes it was "internal error: store_reset failed".
5773 18. If a server dropped the connection unexpectedly when an Exim client was
5774 using GnuTLS and trying to read a response, the client delivery process
5775 crashed while trying to generate an error log message.
5777 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5778 string, for example:
5780 warn message = H1: something\nH2: something
5782 the text was added as a single header line from Exim's point of view
5783 though it ended up OK in the delivered message. However, searching for the
5784 second and subsequent header lines using $h_h2: did not work. This has been
5785 fixed. Similarly, if a system filter added multiple headers in this way,
5786 the routers could not see them.
5788 20. Expanded the error message when iplsearch is called with an invalid key to
5789 suggest using net-iplsearch in a host list.
5791 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5792 ACLs are no longer actually imposed (and a message to that effect is
5795 22. If a "gecos" field in a passwd entry contained escaped characters, in
5796 particular, if it contained a \" sequence, Exim got it wrong when building
5797 a From: or a Sender: header from that name. A second bug also caused
5798 incorrect handling when an unquoted " was present following a character
5799 that needed quoting.
5801 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5802 was not being matched caselessly.
5804 24. Arranged for all hyphens in the exim.8 source to be escaped with
5807 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5808 properly. Recipient callout cache records were still being keyed to include
5809 the sender, even when use_sender was set false. This led to far more
5810 callouts that were necessary. The sender is no longer included in the key
5811 when use_sender is false.
5813 26. Added "control = submission" modifier to ACLs.
5815 27. Added the ${base62d: operator to decode base 62 numbers.
5817 28. dnsdb lookups can now access SRV records.
5819 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5820 the configuration file.
5822 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5823 (-v) mode. This makes the output for a verbose queue run more intelligible.
5825 31. Added a use_postmaster feature to recipient callouts.
5827 32. Added the $body_zerocount variable, containing the number of binary zero
5828 bytes in the message body.
5830 33. The time of last modification of the "new" subdirectory is now used as the
5831 "mailbox time last read" when there is a quota error for a maildir
5834 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5836 35. Added +ignore_unknown as a special item in host lists.
5838 36. Code for decoding IPv6 addresses in host lists is now included, even if
5839 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5840 address was recognized as an IP address, but was then not correctly decoded
5841 into binary, causing unexpected and incorrect effects when compared with
5848 1. Very minor rewording of debugging text in manualroute to say "list of
5849 hosts" instead of "hostlist".
5851 2. If verify=header_syntax was set, and a header line with an unqualified
5852 address (no domain) and a large number of spaces between the end of the
5853 name and the colon was received, the reception process suffered a buffer
5854 overflow, and (when I tested it) crashed. This was caused by some obsolete
5855 code that should have been removed. The fix is to remove it!
5857 3. When running in the test harness, delay a bit after writing a bounce
5858 message to get a bit more predictability in the log output.
5860 4. Added a call to search_tidyup() just before forking a reception process. In
5861 theory, someone could use a lookup in the expansion of smtp_accept_max_
5862 per_host which, without the tidyup, could leave open a database connection.
5864 5. Added the variables $recipient_data and $sender_data which get set from a
5865 lookup success in an ACL "recipients" or "senders" condition, or a router
5866 "senders" option, similar to $domain_data and $local_part_data.
5868 6. Moved the writing of debug_print from before to after the "senders" test
5871 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5872 problems for message scanning, either using a data ACL, or using
5873 local_scan() because the Received: header was not generated till after they
5874 were called (in order to set the time as the time of reception completion).
5875 I have revised the way this works. The header is now generated after the
5876 body is received, but before the ACL or local_scan() are called. After they
5877 are run, the timestamp in the header is updated.
5883 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5884 before starting a queue runner without re-exec. This happened only when
5885 deliver_drop_privilege was set or when the Exim user was set to root. The
5886 effect of the bug was that timeouts during subsequent deliveries caused
5887 crashes instead of being properly handled. The handler is now left at its
5888 default (and expected) setting.
5890 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5891 message, again when deliver_drop_privilege is set or Exim is run as root.
5892 The bug described in (1) was not present in this case, but the tidying up
5893 of the other signals was missing. I have made the two cases consistent.
5895 3. The ignore_target_hosts setting on a manualroute router was being ignored
5896 for hosts that were looked up using the /MX notation.
5898 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5901 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5902 operated on the sender address. After changing the $sender_address to <>
5903 for the sender address verify, Exim was re-instated it as the original
5904 (before rewriting) address, but remembering that it had rewritten it, so it
5905 wasn't rewriting it again. This bug also had the effect of breaking the
5906 sender address verification caching when the sender address was rewritten.
5908 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5909 This has been changed so that if the ip literal address matches
5910 ignore_target_hosts, the router declines.
5912 7. Added expansion conditions match_domain, match_address, and match_local_
5913 part (NOT match_host).
5915 8. The placeholder for the Received: header didn't have a length field set.
5917 9. Added code to Exim itself and to exim_lock to test for a specific race
5918 condition that could lead to file corruption when using MBX delivery. The
5919 issue is with the lockfile that is created in /tmp. If this file is removed
5920 after a process has opened it but before that process has acquired a lock,
5921 there is the potential for a second process to recreate the file and also
5922 acquire a lock. This could lead to two Exim processes writing to the file
5923 at the same time. The added code performs the same test as UW imapd; it
5924 checks after acquiring the lock that its file descriptor still refers to
5925 the same named file.
5927 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5928 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5931 11. Added the smtp_active_hostname option. If used, this will typically be made
5932 to depend on the incoming interface address. Because $interface_address is
5933 not set up until the daemon has forked a reception process, error responses
5934 that can happen earlier (such as "too many connections") no longer contain
5937 12. If an expansion in a condition on a "warn" statement fails because a lookup
5938 defers, the "warn" statement is abandoned, and the next ACL statement is
5939 processed. Previously this caused the whole ACL to be aborted.
5941 13. Added the iplsearch lookup type.
5943 14. Added ident_timeout as a log selector.
5945 15. Added tls_certificate_verified as a log selector.
5947 16. Added a global option tls_require_ciphers (compare the smtp transport
5948 option of the same name). This controls incoming TLS connections.
5950 17. I finally figured out how to make tls_require_ciphers do a similar thing
5951 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5952 before starting the TLS session.
5954 18. Tabs are now shown as \t in -bP output.
5956 19. If the log selector return_path_on_delivery was set, Exim crashed when
5957 bouncing a message because it had too many Received: header lines.
5959 20. If two routers both had headers_remove settings, and the first one included
5960 a superfluous trailing colon, the final name in the first list and the
5961 first name in the second list were incorrectly joined into one item (with a
5962 colon in the middle).
5968 1. Added -C and -D options to the exinext utility, mainly to make it easier
5969 to include in the automated testing, but these could be helpful when
5970 multiple configurations are in use.
5972 2. The exinext utility was not formatting the output nicely when there was
5973 an alternate port involved in the retry record key, nor when there was a
5974 message id as well (for retries that were specific to a specific message
5975 and a specific host). It was also confused by IPv6 addresses, because of
5976 the additional colons they contain. I have fixed the IPv4 problem, and
5977 patched it up to do a reasonable job for IPv6.
5979 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5980 delivery, the log line now contains "pipelined" if PIPELINING was used.
5982 4. An SMTP transport process used to panic and die if the bind() call to set
5983 an explicit outgoing interface failed. This has been changed; it is now
5984 treated in the same way as a connect() failure.
5986 5. A reference to $sender_host_name in the part of a conditional expansion
5987 that was being skipped was still causing a DNS lookup. This no longer
5990 6. The def: expansion condition was not recognizing references to header lines
5991 that used bh_ and bheader_.
5993 7. Added the _cache feature to named lists.
5995 8. The code for checking quota_filecount in the appendfile transport was
5996 allowing one more file than it should have been.
5998 9. For compatibility with Sendmail, the command line option
6006 and sets the incoming protocol and host name (for trusted callers). The
6007 host name and its colon can be omitted when only the protocol is to be set.
6008 Note the Exim already has two private options, -pd and -ps, that refer to
6009 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6010 "s", but I don't think that's a major issue.
6012 10. A number of refactoring changes to the code, none of which should affect
6015 (a) The number of logging options was getting close to filling up the
6016 32-bit word that was used as a bit map. I have split them into two classes:
6017 those that are passed in the argument to log_write(), and those that are
6018 only ever tested independently outside of that function. These are now in
6019 separate 32-bit words, so there is plenty of room for expansion again.
6020 There is no change in the user interface or the logging behaviour.
6022 (b) When building, for example, log lines, the code previously used a
6023 macro that called string_cat() twice, in order to add two strings. This is
6024 not really sufficiently general. Furthermore, there was one instance where
6025 it was actually wrong because one of the argument was used twice, and in
6026 one call a function was used. (As it happened, calling the function twice
6027 did not affect the overall behaviour.) The macro has been replaced by a
6028 function that can join an arbitrary number of extra strings onto a growing
6031 (c) The code for expansion conditions now uses a table and a binary chop
6032 instead of a serial search (which was left over from when there were very
6033 few conditions). Also, it now recognizes conditions like "pam" even when
6034 the relevant support is not compiled in: a suitably worded error message is
6035 given if an attempt is made to use such a condition.
6037 11. Added ${time_interval:xxxxx}.
6039 12. A bug was causing one of the ddress fields not to be passed back correctly
6040 from remote delivery subprocesses. The field in question was not being
6041 subsequently used, so this caused to problems in practice.
6043 13. Added new log selectors queue_time and deliver_time.
6045 14. Might have fixed a bug in maildirsizefile handling that threw up
6046 "unexpected character" debug warnings, and recalculated the data
6047 unnecessarily. In any case, I expanded the warning message to give more
6050 15. Added the message "Restricted characters in address" to the statements in
6051 the default ACL that block characters like @ and % in local parts.
6053 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6054 Three changes have been made:
6056 (a) There was a serious bug; a negative response to MAIL caused the whole
6057 recipient domain to be cached as invalid, thereby blocking all messages
6058 to all local parts at the same domain, from all senders. This bug has
6059 been fixed. The domain is no longer cached after a negative response to
6060 MAIL if the sender used is not empty.
6062 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6065 (c) A new callout option, "use_sender" has been added for people who want
6066 the modified behaviour.
6072 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6075 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6076 indeed breaks things for older releases.
6078 3. Added additional logging to the case where there is a problem reading data
6079 from a filter that is running in a subprocess using a pipe, in order to
6080 try to track down a specific problem.
6082 4. Testing facility fudge: when running in the test harness and attempting
6083 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6084 getting "No route to host". Convert this to a timeout.
6086 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6089 6. Some OS don't have socklen_t but use size_t instead. This affects the
6090 fifth argument of getsockopt() amongst other things. This is now
6091 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6092 can be set for individual OS. I have set it for SunOS5, OSF1, and
6093 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6094 some earlier ones do not.
6096 7. Change 4.30/15 was not doing the test caselessly.
6098 8. The standard form for an IPv6 address literal was being rejected by address
6099 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6100 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6101 this, as well as the form without the "IPv6" on the front (but only when
6102 address literals are enabled, of course).
6104 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6106 10. Exim crashed if a message with an empty sender address specified by -f
6107 encountered a router with an errors_to setting. This could be provoked only
6108 by a command such as
6112 where an empty string was supplied; "<>" did not hit this bug.
6114 11. Installed PCRE release 4.5.
6116 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6117 remained set. It is now erased.
6119 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6120 times from message ids (which are base 36 rather than the normal 62).
6122 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6123 were being counted as actual protocol errors, and logged if the log
6124 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6125 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6126 and DATA following a set of rejected RCPTs do not count as protocol errors.
6127 In other words, Exim assumes they were pipelined, though this may not
6128 actually be the case. Of course, in all cases the client gets an
6129 appropriate error code.
6131 15. If a lookup fails in an ACL condition, a message about the failure may
6132 be available; it is used if testing the ACL cannot continue, because most
6133 such messages specify what the cause of the deferral is. However, some
6134 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6135 that caused an old message to be retained and used if a later statement
6136 caused a defer, replacing the real cause of the deferral.
6138 16. If an IP address had so many PTR records that the DNS lookup buffer
6139 was not large enough to hold them, Exim could crash while trying to process
6140 the truncated data. It now detects and logs this case.
6142 17. Further to 4.21/58, another change has been made: if (and only if) the
6143 first line of a message (the first header line) ends with CRLF, a bare LF
6144 in a subsequent header line has a space inserted after it, so as not to
6145 terminate the header.
6147 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6148 unnecessarily, used atoi() instead of strtol(), and didn't check the
6149 termination when getting file sizes from file names by regex.
6151 19. Completely re-implemented the support for maildirsize files, in the light
6152 of a number of problems with the previous contributed implementation
6153 (4.30/29). In particular:
6155 . If the quota is zero, the maildirsize file is maintained, but no quota is
6158 . If the maildir directory does not exist, it is created before any attempt
6159 to write a maildirsize file.
6161 . The quota value in the file is just a cache; if the quota is changed in
6162 the transport, the new value overrides.
6164 . A regular expression is available for excluding directories from the
6167 20. The autoreply transport checks the characters in options that define the
6168 message's headers; it allows continued headers, but it was checking with
6169 isspace() after an embedded newline instead of explicitly looking for a
6172 21. If all the "regular" hosts to which an address was routed had passed their
6173 expiry times, and had not reached their retry times, the address was
6174 bounced, even if fallback hosts were defined. Now Exim should go on to try
6177 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6178 equivalent code in the SMTP transport. Some hosts send humungous responses
6179 to HELO/EHLO, more than 1024 it seems.
6181 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6182 gives compiler warnings in some environments. I've now done it "properly",
6185 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6186 (because of problems with the built-in one) was declared to return uschar *
6187 instead of char *, causing compiler failure.
6189 25. Fixed a file descriptor leak when processing alias/forward files.
6191 26. Fixed a minor format string issue in dbfn.c.
6193 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6195 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6196 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6199 29. When a sender address is verified, it is cached, to save repeating the test
6200 when there is more than one recipient in a message. However, when the
6201 verification involves a callout, it is possible for different callout
6202 options to be set for different recipients. It is too complicated to keep
6203 track of this in the cache, so now Exim always runs a verification when a
6204 callout is required, relying on the callout cache for the optimization.
6205 The overhead is duplication of the address routing, but this should not be
6208 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6209 to be verified with callout=postmaster, and the main callout worked but the
6210 postmaster check failed, the verification correctly failed. However, if a
6211 subsequent RCPT command asked for sender verification *without* the
6212 postmaster check, incorrect caching caused this verification also to fail,
6215 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6216 it was not caching the DNS options (qualify_single, search_parents) that
6217 were used when the lookup failed. A subsequent lookup with different
6218 options therefore always gave the same answer, though there were cases
6219 where it should not have. (Example: a "domains = !$mx_any" option on a
6220 dnslookup router: the "domains" option is always processed without any
6221 widening, but the router might have qualify_single set.) Now Exim uses the
6222 cached value only when the same options are set.
6224 32. Added John Jetmore's "exipick" utility to the distribution.
6226 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6227 than a timeout (e.g. a certificate is required, and is not provided), an
6228 Exim server now closes the connection immediately. Previously it waited for
6229 the client to close - but if the client is SSL, it seems that they each
6230 wait for each other, leading to a delay before one of them times out.
6232 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6233 maintained 0.8.x compatibility because I don't think many are using it, and
6234 it is clearly obsolete.
6236 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6239 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6240 client certificate was expired. A simple patch fixes this, though I don't
6241 understand the full logic of why the verify callback is called multiple
6244 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6245 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6246 which causes problems with some clients (such as the Certicom SSL Plus
6247 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6248 disables the coutermeasure allowing Eudora to connect."
6250 38. Exim was not checking that a write() to a log file succeeded. This could
6251 lead to Bad Things if a log got too big, in particular if it hit a file
6252 size limit. Exim now panics and dies if it cannot write to a log file, just
6253 as it does if it cannot open a log file.
6255 39. Modified OS/Makefile-Linux so that it now contains
6257 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6259 The two -D definitions ensure that Exim is compiled with large file
6260 support, which makes it possible to handle log files that are bigger than
6263 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6264 instance) a domain was checked against a named list that involved a lookup,
6265 causing $domain_data to be set, then another domain was checked against the
6266 same list, then the first domain was re-checked, the value of $domain_data
6267 after the final check could be wrong. In particular, if the second check
6268 failed, it could be set empty. This bug probably also applied to
6271 41. The strip_trailing_dot option was not being applied to the address given
6272 with the -f command-line option.
6274 42. The code for reading a message's header from the spool was incrementing
6275 $received_count, but never initializing it. This meant that the value was
6276 incorrect (doubled) while delivering a message in the same process in which
6277 it was received. In the most common configuration of Exim, this never
6278 happens - a fresh exec is done - but it can happen when
6279 deliver_drop_privilege is set.
6281 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6282 it now includes up to 150 characters of the unexpected data in the log
6285 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6286 and building data strings. The size of both of these buffers was 10 000
6287 bytes - far larger than anybody would *ever* want, thought I. Needless to
6288 say, somebody hit the limit. I have increased the maximum line length to
6289 20 000 and the maximum data length of concatenated lines to 100 000. I have
6290 also fixed two bugs, because there was no checking on these buffers. Tsk,
6291 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6292 buffer is too small.
6294 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6295 lsearch lookups. Now it does.
6297 46. When parsing a route_list item in a manualroute router, a fixed-length
6298 buffer was used for the list of hosts. I made this 1024 bytes long,
6299 thinking that nobody would ever have a list of hosts that long. Wrong.
6300 Somebody had a whole pile of complicated expansion conditions, and the
6301 string was silently truncated, leading to an expansion error. It turns out
6302 that it is easier to change to an unlimited length (owing to other changes
6303 that have happened since this code was originally written) than to build
6304 structure for giving a limitation error. The length of the item that
6305 expands into the list of hosts is now unlimited.
6307 47. The lsearch lookup could not handle data where the length of text line was
6308 more than 4095 characters. Such lines were truncated, leading to shortened
6309 data being returned. It should now handle lines of any length.
6311 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6312 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6315 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6316 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6317 no longer happens in comment lines. A list of replacements is now placed
6318 at the head of all of the source files, except those whose only change is
6319 to replace PERL_COMMAND in the very first #! line.
6321 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6322 messages on the queue, with a bottom-up merge sort, using code contributed
6323 by Michael Haardt. This should make operations like -bp somewhat faster on
6324 large queues. It won't affect queue runners, except when queue_run_in_order
6327 51. Installed eximstats 1.31 in the distribution.
6329 52. Added support for SRV lookups to the dnslookup router.
6331 53. If an ACL referred to $message_body or $message_body_end, the value was not
6332 reset for any messages that followed in the same SMTP session.
6334 54. The store-handling optimization for building very long strings was not
6335 differentiating between the different store pools. I don't think this
6336 actually made any difference in practice, but I've tidied it.
6338 55. While running the routers to verify a sender address, $sender_address
6339 was still set to the sender address. This is wrong, because when routing to
6340 send a bounce to the sender, it would be empty. Therefore, I have changed
6341 it so that, while verifying a sender address, $sender_address is set to <>.
6342 (There is no change to what happens when verifying a recipient address.)
6344 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6345 target A or AAAA records (if not already returned) without resetting the
6346 qualify_single or search_parents options of the DNS resolver. These are
6347 inappropriate in this case because the targets of MX and SRV records must
6348 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6349 target that, when qualified, matched something in the local domain. These
6350 two options are now turned off when doing these lookups.
6352 57. It seems that at least some releases of Reiserfs (which does not have the
6353 concept of a fixed number of inodes) returns zero and not -1 for the
6354 number of available inodes. This interacted badly with check_spool_inodes,
6355 which assumed that -1 was the "no such thing" setting. What I have done is
6356 to check that the total number of inodes is greater than zero before doing
6357 the test of how many are available.
6359 58. When a "warn" ACL statement has a log_message modifier, the message is
6360 remembered, and not repeated. This is to avoid a lot of repetition when a
6361 message has many recipients that cause the same warning to be written.
6362 However, Exim was preserving the list of already written lines for an
6363 entire SMTP session, which doesn't seem right. The memory is now reset if a
6364 new message is started.
6366 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6367 debugging output unless log_rewrite was also set.
6369 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6370 of (int)(handle) when we know that handle contains (void *)(-1).
6372 61. The Exim daemon panic-logs an error return when it closes the incoming
6373 connection. However "connection reset by peer" seems to be common, and
6374 isn't really an error worthy of noting specially, so that particular error
6377 62. When Exim is trying to find all the local interfaces, it used to panic and
6378 die if the ioctl to get the interface flags failed. However, it seems that
6379 on at least one OS (Solaris 9) it is possible to have an interface that is
6380 included in the list of interfaces, but for which you get a failure error
6381 for this call. This happens when the interface is not "plumbed" into a
6382 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6383 failure of the "get flags" call assumes that the interface is down.
6385 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6386 makes life easier for people who are doing arithmetic on fields extracted
6387 from dates, where you often get leading zeros that should not be
6388 interpreted as octal.
6390 64. Added qualify_domain to the redirect router, to override the global
6393 65. If a pathologically long header line contained very many addresses (the
6394 report of this problem mentioned 10 000) and each of them was rewritten,
6395 Exim could use up a very large amount of memory. (It kept on making new
6396 copies of the header line as it rewrote, and never released the old ones.)
6397 At the expense of a bit more processing, the header rewriting function has
6398 been changed so that it no longer eats memory in this way.
6400 66. The generation of the Received: header has been moved from the time that a
6401 message starts to be received, to the time that it finishes. The timestamp
6402 in the Received: header should now be very close to that of the <= log
6403 line. There are two side-effects of this change:
6405 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6406 logged header lines no longer include the local Received: line, because
6407 it has not yet been created. The same applies to a copy of the message
6408 that is returned to a non-SMTP sender when a message is rejected.
6410 (b) When a filter file is tested using -bf, no additional Received: header
6411 is added to the test message. After some thought, I decided that this
6414 This change does not affect the value of $received_for. It is still set
6415 after address rewriting, but before local_scan() is called.
6417 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6419 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6420 gave an unhelpful panic error message, and a defer error. I have managed to
6421 change this behaviour so that it now rejects any supplied certificate,
6422 which seems right, as the list of acceptable certificates is empty.
6424 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6425 gave an unhelpful defer error. I have not managed to make this reject any
6426 supplied certificates, but the error message it gives is "no certificate
6427 supplied", which is not helpful.
6429 70. exigrep's output now also includes lines that are not associated with any
6430 message, but which match the given pattern. Implemented by a patch from
6431 Martin Sluka, which also tidied up the Perl a bit.
6433 71. Recipient callout verification, like sender verification, was using <> in
6434 the MAIL FROM command. This isn't really the right thing, since the actual
6435 sender may affect whether the remote host accepts the recipient or not. I
6436 have changed it to use the actual sender in the callout; this means that
6437 the cache record is now keyed on a recipient/sender pair, not just the
6438 recipient address. There doesn't seem to be a real danger of callout loops,
6439 since a callout by the remote host to check the sender would use <>.
6440 [SEE ABOVE: changed after hitting problems.]
6442 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6443 temporary errors. However, in the case of such a code being given after
6444 the end of a data transmission (i.e. after ".") Exim was failing to write
6445 a retry record for the message. (Yes, there was some broken host that was
6446 actually sending 8xx at this point.)
6448 73. An unknown lookup type in a host list could cause Exim to panic-die when
6449 the list was checked. (An example that provoked this was putting <; in the
6450 middle of a list instead of at the start.) If this happened during a DATA
6451 ACL check, a -D file could be left lying around. This kind of configuration
6452 error no longer causes Exim to die; instead it causes a defer error. The
6453 incident is still logged to the main and panic logs.
6455 74. Buglet left over from Exim 3 conversion. The message "too many messages
6456 in one connection" was written to the rejectlog but not the mainlog, except
6457 when address rewriting (yes!) was being logged.
6459 75. Added write_rejectlog option.
6461 76. When a system filter was run not as root (that is, when system_filter_user
6462 was set), the values of the $n variables were not being returned to the
6463 main process; thus, they were not subsequently available in the $sn
6466 77. Added +return_path_on_delivery log selector.
6468 78. A connection timeout was being treated differently from recipients deferred
6469 when testing hosts_max_try with a message that was older than the host's
6470 retry timeout. (The host should not be counted, thus allowing all hosts to
6471 be tried at least once before bouncing.) This may have been the cause of an
6472 occasionally reported bug whereby a message would remain on the queue
6473 longer than the retry timeout, but would be bounced if a delivery was
6474 forced. I say "may" because I never totally pinned down the problem;
6475 setting up timeout/retry tests is difficult. See also the next item.
6477 79. The ultimate address timeout was not being applied to errors that involved
6478 a combination of host plus message (for example, a timeout on a MAIL
6479 command). When an address resolved to a number of possible hosts, and they
6480 were not all tried for each delivery (e.g. because of hosts_max_try), a
6481 message could remain on the queue longer than the retry timeout.
6483 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6486 81. Fixed an obscure SMTP outgoing bug which required at least the following
6487 conditions: (a) there was another message waiting for the same server;
6488 (b) the server returned 5xx to all RCPT commands in the first message so
6489 that the message was not completed; (c) the server dropped the connection
6490 or gave a negative response to the RSET that Exim sends to abort the
6491 transaction. The observed case was a dropped connection after DATA that had
6492 been sent in pipelining mode. That is, the server had advertised PIPELINING
6493 but was not implementing it correctly. The effect of the bug was incorrect
6494 behaviour, such as trying another host, and this could lead to a crash.
6500 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6501 and daemon.c were passed as pointers to ints; they should have been
6502 pointers to socklen_t variables (which are typically unsigned ints).
6504 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6507 3. Fixed a really odd bug that affected only the testing scheme; patching a
6508 certain fixed string in the binary changed the value of another string that
6509 happened to be identical to the end of the original first string.
6511 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6512 name", it returns that address as the IP address. On some operating
6513 systems (e.g. Solaris), it also passes back the IP address string as the
6514 "host name". However, on others (e.g. Linux), it passes back an empty
6515 string. Exim wasn't checking for this, and was changing the host name to an
6516 empty string, assuming it had been canonicalized.
6518 5. Although rare, it is permitted to have more than one PTR record for a given
6519 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6520 all the names associated with an address, because they do in Solaris.
6521 However, it seems that they do not in Linux for data that comes from the
6522 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6523 I found this out when I moved to a new Linux workstation and tried to run
6524 the Exim test suite.
6526 To get round this problem I have changed the code so that it now does its
6527 own call to the DNS to look up PTR records when searching for a host name.
6528 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6529 addresses that are only in /etc/hosts are still found.
6531 This behaviour is, however, controlled by an option called host_lookup_
6532 order, which defaults to "bydns:byaddr". If people want to use the other
6533 order, or indeed, just use one or the other means of lookup, they can
6534 specify it in this variable.
6536 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6537 some operating systems, this comes back from gethostbyaddr() as an empty
6538 string, and this is what Exim used to test for. However, it seems that in
6539 other systems, "." is yielded. Exim now tests for this case too.
6541 7. The values of check_spool_space and check_log_space are now held internally
6542 as a number of kilobytes instead of an absolute number of bytes. If a
6543 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6544 kilobyte. This means that much larger values can be stored.
6546 8. Exim monitor: an attempt to get the action menu when not actually pointing
6547 at a message produces an empty menu entitled "No message selected". This
6548 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6549 no entries in it ("Shell widget menu has zero width and/or height"). So I
6550 have added a single, blank menu entry in this case.
6552 9. Added ${quote_local_part.
6554 10. MIME decoding is now applied to the contents of Subject: header lines when
6557 11. Now that a reference to $sender_host_address automatically causes a reverse
6558 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6559 host lookup before query-style lookups in lists that might use this
6560 variable. This has therefore been abolished, and the "net-" prefix is no
6561 longer necessary for query-style lookups.
6563 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6564 have been a typo for LFLAGS, so it has been changed.
6566 13. The install script calls Exim with "-C /dev/null" in order to find the
6567 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6568 to be output. However, since Exim outputs its version number before the
6569 error, it didn't break the script. It just looked ugly. I fixed this by
6570 always allowing "-C /dev/null" if the caller is root.
6572 14. Ignore overlarge ACL variable number when reading spool file - insurance
6573 against a later release with more variables having written the file.
6575 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6576 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6577 this, as well as the form without the "IPv6" on the front.
6579 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6580 OS/Makefile-Darwin file.
6582 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6583 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6585 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6586 variable. However, some OS use ints for inodes. I've added cast to long int
6587 to get rid of the compiler warning.
6589 19. I had forgotten to lock out "/../" in configuration file names when
6590 ALT_CONFIG_PREFIX was set.
6592 20. Routers used for verification do not need to specify transports. However,
6593 if such a router generated a host list, and callout was configured, Exim
6594 crashed, because it could not find a port number from the (non-existent)
6595 transport. It now assumes port 25 in this circumstance.
6597 21. Added the -t option to exigrep.
6599 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6600 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6601 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6602 them is set, LOOKUP_LSEARCH is forced.
6604 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6606 24. Added sender and host information to the "rejected by local_scan()" log
6607 line; previously there was no indication of these.
6609 25. Added .include_if_exists.
6611 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6612 Linux. It turns out that not all file systems support this. Apparently some
6613 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6614 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6615 not supported on the file descriptor, is now ignored when Exim is trying to
6616 sync a directory. This applies only to Linux.
6618 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6620 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6621 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6624 29. Added support for maildirsize files from supplied patch (modified a bit).
6626 30. The use of :fail: followed by an empty string could lead Exim to respond to
6627 sender verification failures with (e.g.):
6629 550 Verification failed for <xxx>
6630 550 Sender verify failed
6632 where the first response line was missing the '-' that indicates it is not
6633 the final line of the response.
6635 31. The loop for finding the name of the user that called Exim had a hardwired
6636 limit of 10; it now uses the value of finduser_retries, which is used for
6637 all other user lookups.
6639 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6642 33. Exim was neglecting to zero errno before one call of strtol() when
6643 expanding a string and expecting an integer value. On some systems this
6644 resulted in spurious "integer overflow" errors. Also, it was casting the
6645 result into an int without checking.
6647 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6648 did not work. The code looks as if it has *never* worked, though it appears
6649 to have been documented since at least release 1.62. I have made it work.
6651 35. The "timeout_DNS" error in retry rules, also documented since at least
6652 1.62, also never worked. As it isn't clear exactly what this means, and
6653 clearly it isn't a major issue, I have abolished the feature by treating it
6654 as "timeout", and writing a warning to the main and panic logs.
6656 36. The display of retry rules for -brt wasn't always showing the error code
6659 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6660 timeout_connect_A, timeout_connect_MX.
6662 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6663 to the empty sender.
6665 39. The daemon was not analysing the content of -oX till after it had closed
6666 stderr and disconnected from the controlling terminal. This meant that any
6667 syntax errors were only noted on the panic log, and the return code from
6668 the command was 0. By re-arranging the code a little, I've made the
6669 decoding happen first, so such errors now appear on stderr, and the return
6670 code is 1. However, the actual setting up of the sockets still happens in
6671 the disconnected process, so errors there are still only recorded on the
6674 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6675 connections (as happens on some IP stacks) was logged at start up time as
6676 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6677 it from "IPv6 and IPv4", which means that two separate sockets are being
6680 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6681 says whether AF_INET or AF_INET6 was passed as an argument.
6683 42. Exiwhat output was messed up when time zones were included in log
6686 43. Exiwhat now gives more information about the daemon's listening ports,
6687 and whether -tls-on-connect was used.
6689 44. The "port" option of the smtp transport is now expanded.
6691 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6692 silently ignored. Now an error message is written to the main and panic
6695 46. There's a new ACL modifier called "logwrite" which writes to a log file
6696 as soon as it is encountered.
6698 47. Added $local_user_uid and $local_user_gid at routing time.
6700 48. Exim crashed when trying to verify a sender address that was being
6703 49. Exim was recognizing only a space character after ".include". It now also
6704 recognizes a tab character.
6706 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6707 extracting the relevant information from the specification. The man page no
6708 longer contains scrambled data for the -d option, and I've added a section
6709 at the front about calling Exim under different names.
6711 51. Added "extra_headers" argument to the "mail" command in filter files.
6713 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6716 53. Installed eximstats 1.29.
6718 54. Added transport_filter_timeout as a generic transport option.
6720 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6721 Cc: header lines. This was required by RFC 822, but it not required by RFC
6724 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6725 incoming messages that did not have them. Now it does so only if the
6726 message originates locally, that is, if there is no associated remote host
6727 address. When Resent- header lines are present, this applies to the Resent-
6728 lines rather than the non-Resent- lines.
6730 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6731 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6733 58. Messages for configuration errors now include the name of the main
6734 configuration file - useful now that there may be more than one file in a
6735 list (.included file names were always shown).
6737 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6738 for those rare installations that do not start the daemon as root or run it
6739 setuid root. I've cut out the call to initgroups() if the daemon is not
6742 60. The Exim user and group can now be bound into the binary as text strings
6743 that are looked up at the start of Exim's processing.
6745 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6747 62. Added $mailstore_basename variable.
6749 63. Installed patch to sieve.c from Michael Haardt.
6751 64. When Exim failed to open the panic log after failing to open the main log,
6752 the original message it was trying to log was written to stderr and debug
6753 output, but if they were not available (the usual case in production), it
6754 was lost. Now it is written to syslog before the two lines that record the
6755 failures to open the logs.
6757 65. Users' Exim filters run in subprocesses under the user's uid. It is
6758 possible for a "deliver" command or an alias in a "personal" command to
6759 provoke an address rewrite. If logging of address rewriting is configured,
6760 this fails because the process is not running as root or exim. There may be
6761 a better way of dealing with this, but for the moment (because 4.30 needs
6762 to be released), I have disabled address rewrite logging when running a
6763 filter in a non-root, non-exim process.
6769 1. The buildconfig auxiliary program wasn't quoting the value set for
6770 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6771 not defined. This bug was masked in 4.22 by the effect that was fixed in
6774 2. Some messages that were rejected after a message id was allocated were
6775 shown as "incomplete" by exigrep. It no longer does this for messages that
6776 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6778 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6779 have allow_domain_literals set, the ID did not get logged in the <= line.
6780 Domain literals are now always recognized in Message-ID: header lines.
6782 4. The first argument for a ${extract expansion item is the key name or field
6783 number. Leading and trailing spaces in this item were not being ignored,
6784 causing some misleading effects.
6786 5. When deliver_drop_privilege was set, single queue runner processes started
6787 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6788 same command in the process it spins off) were not dropping privilege.
6790 6. When the daemon running as "exim" started a queue runner, it always
6791 re-executed Exim in the spun-off process. This is a waste of effort when
6792 deliver_drop_privilege is set. The new process now just calls the
6793 queue-runner function directly.
6799 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6802 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6803 ignored. Though the use of -oP was forcing the writing of a pid file, it
6804 was always written to the default place.
6806 3. If the message "no IP address found for host xxxx" is generated during
6807 incoming verification, it is now followed by identification of the incoming
6808 connection (so you can more easily find what provoked it).
6810 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6812 5. Added some features to "harden" Exim a bit more against certain attacks:
6814 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6815 be put in Local/Makefile. This is like the never_users runtime option,
6816 but it cannot be overridden. The default setting is "root".
6818 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6819 prefix string with which any file named in a -C command line option
6822 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6823 is retained for -C and -D only if the caller of Exim is root. Without
6824 it, the exim user may also use -C and -D and retain privilege.
6826 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6827 command line option is disabled.
6829 6. Macro names set by the -D option must start with an upper case letter, just
6830 like macro names defined in the configuration file.
6832 7. Added "dereference=" facility to LDAP.
6834 8. Two instances of the typo "uknown" in the source files are fixed.
6836 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6837 the Configure-Makefile script screwed up while processing it.
6839 10. Incorporated PCRE 4.4.
6841 11. The SMTP synchronization check was not operating right at the start of an
6842 SMTP session. For example, it could not catch a HELO sent before the client
6843 waited for the greeting. There is now a check for outstanding input at the
6844 point when the greeting is written. Because of the duplex, asynchronous
6845 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6846 way, but not yet received, when the check is performed.
6848 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6849 on TCP/IP sockets, because this apparently causes some broken clients to
6852 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6853 unchanged) from the Cygwin maintainer.
6855 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6856 was supported instead of testing for mbx. Effectively a typo.
6858 15. The spa authenticator server code was not checking that the input it
6859 received was valid base64.
6861 16. The debug output line for the "set" modifier in ACLs was not showing the
6862 name of the variable that was being set.
6864 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6866 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6867 lookup on its own. Something else was needed to trigger the lookup. For
6868 example, a match in host_lookup or the need for a host name in a host list.
6869 Now, if $sender_host_name is referenced and the host name has not yet been
6870 looked up, a lookup is performed. If the lookup fails, the variable remains
6871 empty, and $host_lookup_failed is set to "1".
6873 19. Added "eqi" as a case-independent comparison operator.
6875 20. The saslauthd authentication condition could segfault if neither service
6876 nor realm was specified.
6878 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6879 error message that was logged was misleading, and incoming SMTP
6880 connections were dropped. The message is now more accurate, and temporary
6881 errors are given to SMTP connections.
6883 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6884 (except RSET) with a 421 error, until QUIT is received. However, it was
6885 failing to send a response to QUIT.
6887 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6888 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6889 ACL is now run after the helo_try_verify_hosts code.
6891 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6892 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6893 case-independent, so other case variants are also recognized). Apparently
6894 some systems use these upper case variants.
6896 25. If more than two messages were waiting for the same host, and a transport
6897 filter was specified for the transport, Exim sent two messages over the
6898 same TCP/IP connection, and then failed with "socket operation on non-
6899 socket" when it tried to send the third.
6901 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6903 27. The extern definition of crypt16() in expand.c was not being excluded when
6904 the OS had its own crypt16() function.
6906 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6907 as a preferred synonym for return_size_limit, both as an option and as an
6910 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6912 30. Changed the default configuration ACL to relax the local part checking rule
6913 for addresses that are not in any local domains. For these addresses,
6914 slashes and pipe symbols are allowed within local parts, but the sequence
6915 /../ is explicitly forbidden.
6917 31. SPA server authentication was not clearing the challenge buffer before
6920 32. log_message in a "warn" ACL statement was writing to the reject log as
6921 well as to the main log, which contradicts the documentation and doesn't
6922 seem right (because no rejection is happening). So I have stopped it.
6924 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6925 However, I am unable to do any testing of this.
6927 34. Fixed an infelicity in the appendfile transport. When checking directories
6928 for a mailbox, to see if any needed to be created, it was accidentally
6929 using path names with one or more superfluous leading slashes; tracing
6930 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6932 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6933 contents are added to the log line that is written for every discarded
6934 recipient. (Previously a log_message setting was ignored.)
6936 36. The ${quote: operator now quotes the string if it is empty.
6938 37. The install script runs exim in order to find its version number. If for
6939 some reason other than non-existence or emptiness, which it checks, it
6940 could not run './exim', it was installing it with an empty version number,
6941 i.e. as "exim-". This error state is now caught, and the installation is
6944 38. An argument was missing from the function that creates an error message
6945 when Exim fails to connect to the socket for saslauthd authentication.
6946 This could cause Exim to crash, or give a corrupted message.
6948 39. Added isip, isip4, and isip6 to ${if conditions.
6950 40. The ACL variables $acl_xx are now saved with the message, and can be
6951 accessed later in routers, transports, and filters.
6953 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6954 strings in the file are not string-expanded.
6956 42. If a MAIL command specified a SIZE value that was too large to fit into an
6957 int variable, the check against message_size_limit failed. Such values are
6958 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6959 day this will have to be increased, but I don't think I want to be around
6960 when emails are that large.
6967 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6968 iconv() is not standard in FreeBSD.
6970 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6971 IPv6 enabled. The observed symptom was a segmentation fault on return from
6972 the function os_common_find_running_interfaces() in src/os.c.
6974 3. In the check_special_case() function in daemon.c I had used "errno" as an
6975 argument name, which causes warnings on some systems. This was basically a
6976 typo, since it was named "eno" in the comments!
6978 4. The code that waits for the clock to tick (at a resolution of some fraction
6979 of a second) so as to ensure message-id uniqueness was always waiting for
6980 at least one whole tick, when it could have waited for less. [This is
6981 almost certainly not relevant at current processor speeds, where it is
6982 unlikely to ever wait at all. But we try to future-proof.]
6984 5. The function that sleeps for a time interval that includes fractions of a
6985 second contained a race. It did not block SIGALRM between setting the
6986 timer, and suspending (a couple of lines later). If the interval was short
6987 and the sigsuspend() was delayed until after it had expired, the suspension
6988 never ended. On busy systems this could lead to processes getting stuck for
6991 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6992 process, before it forks any delivery processes. The open lookup caching
6993 mechanism meant that the open file or database connection was passed into
6994 the delivery process. The problem was that delivery processes always tidy
6995 up cached lookup data. This could cause a problem for the next delivery
6996 process started by the queue runner, because the external queue runner
6997 process does not know about the closure. So the next delivery process
6998 still has data in the lookup cache. In the case of a file lookup, there was
6999 no problem because closing a file descriptor in a subprocess doesn't affect
7000 the parent. However, if the lookup was caching a connection to a database,
7001 the connection was closed, and the second delivery process was likely to
7002 see errors such as "PGSQL: query failed: server closed the connection
7003 unexpectedly". The problem has been fixed by closing all cached lookups
7004 in a queue runner before running a delivery process.
7006 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7007 seem to have the "const" qualifier which it has on other OS. I've
7010 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7011 *of the same type* (client or server) with the same public name that an
7012 error should be diagnosed.
7014 9. When Exim looked up a host name for an IP address, but failed to find the
7015 original IP address when looking up the host name (a safety check), it
7016 output the message "<ip address> does not match any IP for NULL", which was
7017 confusing, to say the least. The bug was that the host name should have
7018 appeared instead of "NULL".
7020 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7021 user that is built into the binary, and the -C or -D options is used, root
7022 privilege is dropped before the configuration file is read. In addition,
7023 logging is switched to stderr instead of the normal log files. If the
7024 configuration then re-defines the Exim user, the unprivileged environment
7025 is probably not what is expected, so Exim logs a panic warning message (but
7028 However, if deliver_drop_privilege is set, the unprivileged state may well
7029 be exactly what is intended, so the warning has been cut out in that case,
7030 and Exim is allowed to try to write to its normal log files.
7036 1. smtp_return_error_details was not giving details for temporary sender
7037 or receiver verification errors.
7039 2. Diagnose a configuration error if two authenticators have the same public
7042 3. Exim used not to create the message log file for a message until the first
7043 delivery attempt. This could be confusing when incoming messages were held
7044 for policy or load reasons. The message log file is now created at the time
7045 the message is received, and an initial "Received" line is written to it.
7047 4. The automatically generated man page for command line options had a minor
7048 bug that caused no ill effects; however, a more serious problem was that
7049 the procedure for building the man page automatically didn't always
7050 operate. Consequently, release 4.20 contains an out-of-date version. This
7051 shouldn't happen again.
7053 5. When building Exim with embedded Perl support, the script that builds the
7054 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7055 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7057 6. The freeze_tell option was not being used for messages that were frozen on
7058 arrival, either by an ACL or by local_scan().
7060 7. Added the smtp_incomplete_transaction log selector.
7062 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7063 was accepting AUTH without a new EHLO.
7065 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7066 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7069 10. Logging of TCP/IP connections (when configured) now happens in the main
7070 daemon process instead of the child process, so that the TCP/IP connection
7071 count is more accurate (but it can never be perfect).
7073 11. The use of "drop" in a nested ACL was not being handled correctly in the
7074 outer ACL. Now, if condition failure induced by the nested "drop" causes
7075 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7076 or "require"), the connection is dropped.
7078 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7079 that yield "discard" can now be used with an "accept" or a "discard" verb,
7080 but an error is generated for any others (because I can't see a useful way
7081 to define what should happen).
7083 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7084 are now processed in the same way as lines in the Exim configuration file.
7085 In particular, continuation lines are supported.
7087 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7089 15. Added -ti meaning -t -i.
7091 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7092 domains, and warn by logging if others are found.
7094 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7095 returned from GIFCONF when Exim is trying to find the list of interfaces on
7096 a host. The code in os.c has been modified to copy each ifreq to an aligned
7097 structure in all cases.
7099 Also, in some cases, the returned ifreq's were being copied to a 'struct
7100 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7101 means the last couple of bytes of an IPv6 address could be chopped if the
7102 ifreq contained only a normal sockaddr (14 bytes storage).
7104 18. Named domain lists were not supported in the hosts_treat_as_local option.
7105 An entry such as +xxxx was not recognized, and was treated as a literal
7108 19. Ensure that header lines added by a DATA ACL are included in the reject log
7109 if the ACL subsequently rejects the message.
7111 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7112 MD5 (which is deprecated).
7114 21. When testing a filter file using -bf, Exim was writing a message when it
7115 took the sender from a "From " line in the message, but it was not doing so
7116 when it took $return_path from a Return-Path: header line. It now does.
7118 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7119 with a valid header line field name (a series of printing characters
7120 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7122 23. Changed "disc" in the source to "disk" to conform to the documentation and
7123 the book and for uniformity.
7125 24. Ignore Sendmail's -Ooption=value command line item.
7127 25. When execve() failed while trying to run a command in a pipe transport,
7128 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7129 could be confused with a return value of 69 from the command itself. This
7130 has been changed to 127, the value the shell returns if it is asked to run
7131 a non-existent command. The wording for the related log line suggests a
7132 non-existent command as the problem.
7134 26. If received_header_text expands to an empty string, do not add a Received:
7135 header line to the message. (Well, it adds a token one on the spool, but
7136 marks it "old" so that it doesn't get used or transmitted.)
7138 27. Installed eximstats 1.28 (addition of -nt option).
7140 28. There was no check for failure on the call to getsockname() in the daemon
7141 code. This can fail if there is a shortage of resources on the system, with
7142 ENOMEM, for example. A temporary error is now given on failure.
7144 29. Contrary to the C standard, it seems that in some environments, the
7145 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7146 program. Exim now does this explicitly; it affects the formatting of
7147 timestamps using strftime().
7149 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7150 complaints. I've now initialized all the variables, to avoid this.
7152 32. Header lines added by a system filter were not being "seen" during
7153 transport-time rewrites.
7155 33. The info_callback() function passed to OpenSSL is set up with type void
7156 (*)(SSL *, int, int), as described somewhere. However, when calling the
7157 function (actually a macro) that sets it up, the type void(*)() is
7158 expected. I've put in a cast to prevent warnings from picky compilers.
7160 34. If a DNS black list lookup found a CNAME record, but there were no A
7161 records associated with the domain it pointed at, Exim crashed.
7163 35. If a DNS black list lookup returned more than one A record, Exim ignored
7164 all but the first. It now scans all returned addresses if a particular IP
7165 value is being sought. In this situation, the contents of the
7166 $dnslist_value variable are a list of all the addresses, separated by a
7169 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7170 to accept a host name and all its aliases if the forward lookup for any of
7171 them yielded the IP address of the incoming connection. Now it accepts only
7172 those names whose forward lookup yields the correct IP address. Any other
7173 names are discarded. This closes a loophole whereby a rogue DNS
7174 administrator could create reverse DNS records to break through a
7175 wildcarded host restriction in an ACL.
7177 37. If a user filter or a system filter that ran in a subprocess used any of
7178 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7179 the wrong values were passed to the pipe command ($thisaddress had the
7180 value of $0, $0 had the value of $1, etc). This bug was introduced by
7181 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7183 38. Improved the line breaking for long SMTP error messages from ACLs.
7184 Previously, if there was no break point between 40 and 75 characters, Exim
7185 left the rest of the message alone. Two changes have been made: (a) I've
7186 reduced the minimum length to 35 characters; (b) if it can't find a break
7187 point between 35 and 75 characters, it looks ahead and uses the first one
7188 that it finds. This may give the occasional overlong line, but at least the
7189 remaining text gets split now.
7191 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7192 file descriptors might be low, and that setting 1000 would always raise it.
7193 It turns out that in some environments, the limit is already over 1000 and
7194 that lowering it causes trouble. So now Exim takes care not to decrease it.
7196 40. When delivering a message, the value of $return_path is set to $sender_
7197 address at the start of routing (routers may change the value). By an
7198 oversight, this default was not being set up when an address was tested by
7199 -bt or -bv, which affected the outcome if any router or filter referred to
7202 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7203 log only when "message" or "log_message" are set. However, if one of the
7204 conditions was an address verification, or a call to a nested ACL, the
7205 messages generated by the underlying test were being passed through. This
7206 no longer happens. The underlying message is available in $acl_verify_
7207 message for both "message" and "log_message" expansions, so it can be
7208 passed through if needed.
7210 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7211 new expansion $bh_ to give the encoded byte string without charset
7212 translation. Translation happens only if iconv() is available; HAVE_ICONV
7213 indicates this at build time. HEADERS_CHARSET gives the charset to
7214 translate to; headers_charset can change it in the configuration, and
7215 "headers charset" can change it in an individual filter file.
7217 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7218 that creates RFC 2047 encoded "words" labels them as that charset instead
7219 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7220 expansion operator; (ii) when Exim creates a From: line for a local
7221 message; (iii) when a header line is rewritten to include a "phrase" part.
7223 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7224 buggy, causing it to skip the first lines of messages whose message ID
7225 ended in 'D'. This would not have bitten before Exim release 4.14, because
7226 message IDs were unlikely to end in 'D' before then. The effect was to have
7227 incorrect size information for certain domains.
7229 45. #include "config.h" was missing at the start of the crypt16.c module. This
7230 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7233 46. If there was a timeout during a "random" callout check, Exim treated it as
7234 a failure of the random address, and carried on sending RSET and the real
7235 address. If the delay was just some slowness somewhere, the response to the
7236 original RCPT would be taken as a response to RSET and so on, causing
7237 mayhem of various kinds.
7239 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7240 when I implemented it. It didn't allow for the fact that some option values
7241 may legitimately be negative (e.g. size_addition), and it didn't even do
7242 the right test for positive values.
7244 48. Domain names in DNS records are case-independent. Exim always looks them up
7245 in lower case. Some resolvers return domain names in exactly the case they
7246 appear in the zone file, that is, they may contain uppercase letters. Not
7247 all resolvers do this - some return always lower case. Exim was treating a
7248 change of case by a resolver as a change of domain, similar to a widening
7249 of a domain abbreviation. This triggered its re-routing code and so it was
7250 trying to route what was effectively the same domain again. This normally
7251 caused routing to fail (because the router wouldn't handle the domain
7252 twice). Now Exim checks for this case specially, and just changes the
7253 casing of the domain that it ultimately uses when it transmits the message
7256 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7259 50. If a filter generated a file delivery with a non-absolute name (possible if
7260 no home directory exists for the router), the forbid_file option was not
7263 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7264 the existing equality matching.
7266 52. Exim was using ints instead of ino_t variables in some places where it was
7267 dealing with inode numbers.
7269 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7270 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7271 called TMPDIR, and if it finds it is different, it changes its value.
7273 54. The smtp_printf() function is now made available to local_scan() so
7274 additional output lines can be written before returning. There is also an
7275 smtp_fflush() function to enable the detection of a dropped connection.
7276 The variables smtp_input and smtp_batched_input are exported to
7279 55. Changed the default runtime configuration: the message "Unknown user"
7280 has been removed from the ACL, and instead placed on the localuser router,
7281 using the cannot_route_message feature. This means that any verification
7282 failures that generate their own messages won't get overridden. Similarly,
7283 the "Unrouteable address" message that was in the ACL for unverifiable
7284 relay addresses has also been removed.
7286 56. Added hosts_avoid_esmtp to the smtp transport.
7288 57. The exicyclog script was not checking for the esoteric option
7289 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7290 will work only if exicyclog is run under the appropriate euid.
7292 58. Following a discussion on the list, the rules by which Exim recognises line
7293 endings on incoming messages have been changed. The -dropcr and drop_cr
7294 options are now no-ops, retained only for backwards compatibility. The
7295 following line terminators are recognized: LF CRLF CR. However, special
7296 processing applies to CR:
7298 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7299 nor a local message in the state where . is a terminator.
7301 (ii) If a bare CR is encountered in a header line, an extra space is added
7302 after the line terminator so as not to end the header. The reasoning
7303 behind this is that bare CRs in header lines are most likely either
7304 to be mistakes, or people trying to play silly games.
7306 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7307 was being incorrectly given as 18 bytes larger than it should have been.
7308 This is a VOB (very old bug).
7310 60. This may never have affected anything current, but just in case it has:
7311 When the local host is found other than at the start of a list of hosts,
7312 the local host, those with the same MX, and any that follow, are discarded.
7313 When the list in question was part of a longer list of hosts, the following
7314 hosts (not currently being processed) were also being discarded. This no
7315 longer happens. I'm not sure if this situation could ever has previously
7318 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7321 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7322 header. This is something that is recommended in a new Internet Draft, and
7323 is something that is documented as being done by Sendmail. There are two
7324 possible values. For messages generated by the autoreply transport, Exim
7327 Auto-Submitted: auto-replied
7329 whereas for all other generated messages (e.g. bounces) it adds
7331 Auto-Submitted: auto-generated
7333 63. The "personal" condition in filters now includes a test for the
7334 Auto-Submitted: header. If it contains the string "auto-" the message it
7335 not considered personal.
7337 64. Added rcpt_include_affixes as a generic transport option.
7339 65. Added queue_only_override (default true).
7341 66. Added the syslog_duplication option.
7343 67. If what should have been the first header line of a message consisted of
7344 a space followed by a colon, Exim was mis-interpreting it as a header line.
7345 It isn't of course - it is syntactically invalid and should therefore be
7346 treated as the start of the message body. The misbehaviour could have
7347 caused a number of strange effects, including loss of data in subsequent
7348 header lines, and spool format errors.
7350 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7351 client host had authenticated. This control can now be exercised by an ACL
7352 for more flexibility.
7354 69. By default, callouts do not happen when testing with -bh. There is now a
7355 variant, -bhc, which does actually run the callout code, including
7356 consulting and updating the callout cache.
7358 70. Added support for saslauthd authentication, courtesy of Alexander
7361 71. If statvfs() failed on the spool or log directories while checking their
7362 size for availability, Exim confusingly gave the error "space shortage".
7363 Furthermore, in debugging mode it crashed with a floating point exception.
7364 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7365 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7366 serious problem, Exim now writes to the main and panic logs when this
7367 happens, with details of the failure. It then refuses to accept the
7368 incoming message, giving the message "spool directory problem" or "log
7369 directory problem" with a 421 code for SMTP messages.
7371 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7372 0, 1, and 2 exist, because some OS complain for execs without them (see
7373 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7374 descriptors. However, the code omitted to check that the open succeeded,
7375 causing mysterious errors if for some reason the permissions on /dev/null
7376 got screwed. Now Exim writes a message to the main and panic logs, and
7377 bombs out if it can't open /dev/null.
7379 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7380 interact so that it is all more flexible. It is supposed to remain
7381 backwards compatible. Also added extra_local_interfaces.
7383 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7384 to bomb out with an assertion failure - to the client this appears as a
7385 connection drop. This problem occurs in the part of the code that was taken
7386 from the Samba project. Fortunately, the assertion is in a very simple
7387 function, so I have fixed this by reproducing the function inline in the
7388 one place where it is called, and arranging for authentication to fail
7389 instead of killing the process with assert().
7391 75. The SPA client code was not working when the server requested OEM rather
7392 than Unicode encoding.
7394 76. Added code to make require_files with a specific uid setting more usable in
7395 the case where statting the file as root fails - usually a non-root-mounted
7396 NFS file system. When this happens and the failure is EACCES, Exim now
7397 forks a subprocess and does the per-uid checking as the relevant uid.
7399 77. Added process_log_path.
7401 78. If log_file_path was not explicitly set, a setting of check_log_space or
7402 check_log_inodes was ignored.
7404 79. If a space check for the spool or log partitions fails, the incident is now
7405 logged. Of course, in the latter case the data may get lost...
7407 80. Added the %p formatting code to string_format() so that it can be used to
7408 print addresses in debug_print(). Adjusted all the address printing in the
7409 debugging in store.c to use %p rather than %d.
7411 81. There was a concern that a line of code in smtp_in.c could overflow a
7412 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7413 initially expressed, the concern was not well-founded, because trailing
7414 spaces are removed early. However, if the trailing spaces were followed by
7415 a NULL, they did not get removed, so the overflow was possible. Two fixes
7418 (a) I re-wrote the offending code in a cleaner fashion.
7419 (b) If an incoming SMTP command contains a NULL character, it is rejected
7422 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7423 runs initgroups(), so that if the Exim user is in any additional groups,
7424 they will be used during message reception.
7430 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob