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.
11 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
12 side, to decode a TLS 1.3 packet capture.
14 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
15 Previously the default library behaviour applied, sending two, each in
18 JH/03 Debug output for ACL now gives the config file name and line number for
21 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
23 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
25 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
26 buffer overrun for (non-chunking) other transports.
28 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
29 TLS1.3, means that a server rejecting a client certificate is not visible
30 to the client until the first read of encrypted data (typically the
31 response to EHLO). Add detection for that case and treat it as a failed
32 TLS connection attempt, so that the normal retry-in-clear can work (if
35 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
36 and/or domain. Found and fixed by Jason Betts.
38 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
39 configuration). If a CNAME target was not a wellformed name pattern, a
42 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
43 the OS reports them interleaved with other addresses.
45 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
46 used both for input and for a verify callout, both encrypted, SMTP
47 responses being sent by the server could be lost. This resulted in
48 dropped connections and sometimes bounces generated by a peer sending
51 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
52 string. Previously it was possible to cause undefined behaviour in a
53 library routine (usually a crash). Found by "zerons".
55 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
58 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
59 API was removed, so update to use the newer ones.
65 JH/01 Remove code calling the customisable local_scan function, unless a new
66 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
68 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
69 non-signal-safe functions being used.
71 JH/03 Bug 2269: When presented with a received message having a stupidly large
72 number of DKIM-Signature headers, disable DKIM verification to avoid
73 a resource-consumption attack. The limit is set at twenty.
75 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
76 report of oldest_pass in ${authres } in consequence, and separate out
77 some descriptions of reasons for verification fail.
79 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
80 files in the spool were present and unlocked. A queue-runner could spot
81 them, resulting in a duplicate delivery. Fix that by doing the unlock
82 after the unlink. Investigation by Tim Stewart. Take the opportunity to
83 add more error-checking on spoolfile handling while that code is being
86 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
87 No known attacks, no CVE, this is defensive hardening.
89 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
90 a queue-runner could start a delivery while other operations were ongoing.
91 Cutthrough delivery was a common victim, resulting in duplicate delivery.
92 Found and investigated by Tim Stewart. Fix by using the open message data
93 file handle rather than opening another, and not locally closing it (which
94 releases a lock) for that case, while creating the temporary .eml format
95 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
97 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
98 $sender_verify_failure/$recipient_verify_failure to "random".
100 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
103 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
104 Previously this would segfault.
106 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
109 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
110 like zero, since the resolver should be doing this for us, But we need one
111 as a CNAME but no MX presence gets the CNAME returned; we need to check
112 that doesn't point to an MX to declare it "no MX returned" rather than
113 "error, loop". A new main option is added so the older capability of
114 following some limited number of chain links is maintained.
116 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
118 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
119 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
120 now-deprecated earlier definitions used only specified the range up to TLS
121 1.2 (in the older-version library docs).
123 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
125 JH/15 Rework TLS client-side context management. Stop using a global, and
126 explicitly pass a context around. This enables future use of TLS for
127 connections to service-daemons (eg. malware scanning) while a client smtp
128 connection is using TLS; with cutthrough connections this is quite likely.
130 JH/16 Fix ARC verification to do AS checks in reverse order.
132 JH/17 Support a "tls" option on the ${readsocket } expansion item.
134 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
135 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
136 Previously the "utf8" would be re-prepended for every additional message.
138 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
139 Previously thery were accepted, resulting in issues when attempting to
140 forward messages to a non-supporting MTA.
142 PP/02 Let -n work with printing macros too, not just options.
144 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
145 one parent address was copied, and bogus data was used at delivery-logging
146 time. Either a crash (after delivery) or bogus log data could result.
147 Discovery and analysis by Tim Stewart.
149 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
150 Previously if the string ended mid-character, we did not insert the
151 promised '?' replacement.
153 PP/04 Documentation: current string operators work on bytes, not codepoints.
155 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
156 should pack well giving a smaller memory footprint so better caching and
157 therefore performance. Group the declarations where this can't be done so
158 that the byte-sized flag variables are not interspersed among pointer
159 variables, giving a better chance of good packing by the compiler.
161 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
162 non-null, to avoid issues with sites running BATV. Previously reports were
163 sent with an empty envelope sender so looked like bounces.
165 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
166 The ignore_error flag wasn't being returned from the filter subprocess so
167 was not set for later routers. Investigation and fix by Matthias Kurz.
169 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
170 and a msg:complete for the whole, when a message is manually removed using
171 -Mrm. Developement by Matthias Kurz, hacked on by JH.
173 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
174 a "Gnu special" function, asprintf() in the DB utility binary builds; I
175 hope that is portable enough.
177 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
178 requiring a known-CA anchor certificate; make it now rely entirely on the
179 TLSA as an anchor. Checking the name on the leaf cert against the name
180 on the A-record for the host is still done for TA (but not for EE mode).
182 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
183 included in delivery lines for non-proxied connections, when compiled with
184 SUPPORT_SOCKS and running with proxy logging enabled.
186 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
187 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
188 move the existing event to fire before the normal logging of message
189 failure so that custom logging is bracketed by normal logging.
191 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
192 msg:fail:internal event. Developement by Matthias Kurz.
194 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
195 far too small for todays use of crypto signatures stored there. Go all
196 the way to the max DNS message size of 64kB, even though this might be
197 overmuch for IOT constrained device use.
199 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
200 copy a string over itself. The library routine is documented as not
201 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
203 JH/32 For main options check_spool_space and check_inode_space, where the
204 platform supports 64b integers, support more than the previous 2^31 kB
205 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
206 the previous G, M, k.
208 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
209 $authenticated_fail_id variable on authentication failure. Previously
212 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
213 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
214 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
215 GNUTLS_SEC_PARAM_MEDIUM.
217 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
218 side. Previously we would continue as if no SNI had been received.
220 JH/36 Harden the handling of string-lists. When a list consisted of a sole
221 "<" character, which should be a list-separator specification, we walked
222 off past the nul-terimation.
224 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
225 causes) even when the retry time is not yet met. Previously they were
226 not, meaning that when (say) an account was over-quota and temp-rejecting,
227 and multiple senders' messages were queued, only one sender would get
228 notified on each configured delay_warning cycle.
230 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
232 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
233 cipher-suites, an error can be left on the stack even for a succeeding
234 accept; this results in impossible error messages when a later operation
237 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
238 return error codes indicating retry. Under TLS1.3 this becomes required.
240 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
241 it only wrote the new authenticators, resulting in a lack of tracking of
242 peer changes of ESMTP extensions until the next cache flush.
244 JH/41 Fix the loop reading a message header line to check for integer overflow,
245 and more-often against header_maxsize. Previously a crafted message could
246 induce a crash of the recive process; now the message is cleanly rejected.
248 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
249 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
255 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
256 When redis_servers is set to a list of > 1 element, and the Redis servers
257 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
258 case of MOVED into a DEFER case instead, thus moving the query onto the
259 next server in the list. For a cluster of N elements, all N servers must
260 be defined in redis_servers.
262 GF/02 Catch and remove uninitialized value warning in exiqsumm
263 Check for existence of @ARGV before looking at $ARGV[0]
265 JH/01 Replace the store_release() internal interface with store_newblock(),
266 which internalises the check required to safely use the old one, plus
267 the allocate and data copy operations duplicated in both (!) of the
268 extant use locations.
270 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
271 modifier. This matches the restriction on the commandline.
273 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
274 Previously only the last row was returned.
276 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
277 we assumed that tags in the header were well-formed, and parsed the
278 element content after inspecting only the first char of the tag.
279 Assumptions at that stage could crash the receive process on malformed
282 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
283 While running the DKIM ACL we operate on the Permanent memory pool so that
284 variables created with "set" persist to the DATA ACL. Also (at any time)
285 DNS lookups that fail create cache records using the Permanent pool. But
286 expansions release any allocations made on the current pool - so a dnsdb
287 lookup expansion done in the DKIM ACL releases the memory used for the
288 DNS negative-cache, and bad things result. Solution is to switch to the
289 Main pool for expansions.
290 While we're in that code, add checks on the DNS cache during store_reset,
291 active in the testsuite.
292 Problem spotted, and debugging aided, by Wolfgang Breyha.
294 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
295 When none of the hosts presented to a transport match an already-open
296 connection, close it and proceed with the list. Previously we would
297 queue the message. Spotted by Lena with Yahoo, probably involving
300 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
301 Previously a spurious "250 OK id=" response was appended to the proper
304 JH/08 The "support for" informational output now, which built with Content
305 Scanning support, has a line for the malware scanner interfaces compiled
306 in. Interface can be individually included or not at build time.
308 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
309 by the template makefile "src/EDITME". The "STREAM" support for an older
310 ClamAV interface method is removed.
312 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
313 rows affected is given instead).
315 JH/11 The runtime Berkeley DB library version is now additionally output by
316 "exim -d -bV". Previously only the compile-time version was shown.
318 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
319 SMTP connection. Previously, when one had more receipients than the
320 first, an abortive onward connection was made. Move to full support for
321 multiple onward connections in sequence, handling cutthrough connection
322 for all multi-message initiating connections.
324 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
325 routers. Previously, a multi-recipient message would fail to match the
326 onward-connection opened for the first recipient, and cause its closure.
328 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
329 a timeout on read on a GnuTLS initiating connection, resulting in the
330 initiating connection being dropped. This mattered most when the callout
331 was marked defer_ok. Fix to keep the two timeout-detection methods
334 JH/15 Relax results from ACL control request to enable cutthrough, in
335 unsupported situations, from error to silently (except under debug)
336 ignoring. This covers use with PRDR, frozen messages, queue-only and
339 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
341 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
342 metadata, resulting in a crash in free().
344 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
345 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
346 Broken also in d185889f4, with init system revamp.
348 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
349 Previously we abruptly closed the connection after reading a malware-
350 found indication; now we go on to read the "scan ok" response line,
353 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
354 ACL. Previously, a crash would result.
356 JH/19 Speed up macro lookups during configuration file read, by skipping non-
357 macro text after a replacement (previously it was only once per line) and
358 by skipping builtin macros when searching for an uppercase lead character.
360 JH/20 DANE support moved from Experimental to mainline. The Makefile control
361 for the build is renamed.
363 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
364 was allocated for every new TLS startup, meaning one per message. Fix
365 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
367 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
368 reported the original. Fix to report (as far as possible) the ACL
369 result replacing the original.
371 JH/23 Fix memory leak during multi-message connections using STARTTLS under
372 OpenSSL. Certificate information is loaded for every new TLS startup,
373 and the resources needed to be freed.
375 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
377 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
380 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
381 DATA response info to the (existing) per-recipient response info for
382 the "C=" log element. It can have useful tracking info from the
383 destination system. Patch from Simon Arlott.
385 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
386 length value. Previously this would segfault.
388 HS/02 Support Avast multiline protoocol, this allows passing flags to
389 newer versions of the scanner.
391 JH/28 Ensure that variables possibly set during message acceptance are marked
392 dead before release of memory in the daemon loop. This stops complaints
393 about them when the debug_store option is enabled. Discovered specifically
394 for sender_rate_period, but applies to a whole set of variables.
395 Do the same for the queue-runner and queue-list loops, for variables set
396 from spool message files. Do the same for the SMTP per-message loop, for
397 certain variables indirectly set in ACL operations.
399 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
400 as a multi-recipient message from a mailinglist manager). The coding had
401 an arbitrary cutoff number of characters while checking for more input;
402 enforced by writing a NUL into the buffer. This corrupted long / fast
403 input. The problem was exposed more widely when more pipelineing of SMTP
404 responses was introduced, and one Exim system was feeding another.
405 The symptom is log complaints of SMTP syntax error (NUL chars) on the
406 receiving system, and refused recipients seen by the sending system
407 (propating to people being dropped from mailing lists).
408 Discovered and pinpointed by David Carter.
410 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
411 replaced by the ${authresults } expansion.
413 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
415 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
416 allows proper process termination in container environments.
418 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
419 Previously the "final dot" had a newline after it; ensure it is CR,LF.
421 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
422 and "err_perm", deprecated since 4.83 when the RFC-defined words
423 "temperror" and "permerror" were introduced.
425 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
426 transport-filters or DKIM-signing. The restriction was lost in the
427 consolidation of verify-callout and delivery SMTP handling.
428 Extend the restriction to also cover ARC-signing.
430 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
431 in defer=pass mode supply a 450 to the initiator. Previously the message
434 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
435 tls_require_ciphers is used as before.
437 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
438 "pass_unscanned". Only tmpfails from the scanner are written to
439 the paniclog, as they may require admin intervention (permission
440 denied, license issues). Other scanner errors (like decompression
441 bombs) do not cause a paniclog entry.
443 JH/36 Fix reinitialisation of DKIM logging variable between messages.
444 Previously it was possible to log spurious information in receive log
447 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
448 triggered odd behaviour from Outlook Express clients.
450 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
453 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
454 since the IETF WG has not yet settled on that versus the original
455 "bare" representation.
457 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
458 Previously the millisecond value corrupted the output.
459 Fix also for syslog_pid=no and log_selector +pid, for which the pid
460 corrupted the output.
466 JH/01 Rework error string handling in TLS interface so that the caller in
467 more cases is responsible for logging. This permits library-sourced
468 string to be attached to addresses during delivery, and collapses
469 pairs of long lines into single ones.
471 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
472 during configuration. Wildcards are allowed and expanded.
474 JH/02 Rework error string handling in DKIM to pass more info back to callers.
475 This permits better logging.
477 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
478 do not close it down and have the child transport start it up again on
479 the passed-on TCP connection. Instead, proxy the child (and any
480 subsequent ones) for TLS via a unix-domain socket channel. Logging is
481 affected: the continued delivery log lines do not have any DNSSEC, TLS
482 Certificate or OCSP information. TLS cipher information is still logged.
484 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
485 identical IP addresses on different listening ports. Will also affect
488 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
489 add noisy ifdef guards to special-case this sillyness.
490 Patch from Bernd Kuhls.
492 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
493 than 255 are no longer allowed.
495 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
496 Disable the session-cache too, which might reduce our load. Since we
497 currrectly use a new context for every connection, both as server and
498 client, there is no benefit for these.
499 GnuTLS appears to not support tickets server-side by default (we don't
500 call gnutls_session_ticket_enable_server()) but client side is enabled
501 by default on recent versions (3.1.3 +) unless the PFS priority string
504 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
505 <https://reproducible-builds.org/specs/source-date-epoch/>.
507 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
508 the check for any unsuccessful recipients did not notice the limit, and
509 erroneously found still-pending ones.
511 JH/08 Pipeline CHUNKING command and data together, on kernels that support
512 MSG_MORE. Only in-clear (not on TLS connections).
514 JH/09 Avoid using a temporary file during transport using dkim. Unless a
515 transport-filter is involved we can buffer the headers in memory for
516 creating the signature, and read the spool data file once for the
517 signature and again for transmission.
519 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
520 4.77 as the kernel support then wasn't solid, having issues in 64bit
521 mode. Now, it's been long enough. Add support for FreeBSD also.
523 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
524 case where the routing stage had gathered several addresses to send to
525 a host before calling the transport for the first, we previously failed
526 to close down TLS in the old transport process before passing the TCP
527 connection to the new process. The new one sent a STARTTLS command
528 which naturally failed, giving a failed delivery and bloating the retry
529 database. Investigation and fix prototype from Wolfgang Breyha.
531 JH/12 Fix check on SMTP command input synchronisation. Previously there were
532 false-negatives in the check that the sender had not preempted a response
533 or prompt from Exim (running as a server), due to that code's lack of
534 awareness of the SMTP input buffering.
536 PP/04 Add commandline_checks_require_admin option.
537 Exim drops privileges sanely, various checks such as -be aren't a
538 security problem, as long as you trust local users with access to their
539 own account. When invoked by services which pass untrusted data to
540 Exim, this might be an issue. Set this option in main configuration
541 AND make fixes to the calling application, such as using `--` to stop
544 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
545 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
546 responses to those, into a single TLS record each way (this usually means
547 a single packet). As a side issue, smtp_enforce_sync now works on TLS
550 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
551 affects you only if you're dancing at the edge of the param size limits.
552 If you are, and this message makes sense to you, then: raise the
553 configured limit or use OpenSSL 1.1. Nothing we can do for older
556 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
557 cmdline element to get the documented default one. Previously it was
560 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
561 are unsuable for non-message-specific reasons - eg. connection timeout,
562 banner-time rejection.
564 JH/16 Fix logging of delivery remote port, when specified by router, under
567 PP/06 Repair manualroute's ability to take options in any order, even if one
568 is the name of a transport.
571 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
573 JH/17 Change the list-building routines interface to use the expanding-string
574 triplet model, for better allocation and copying behaviour.
576 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
577 Previously it was constructed the first time a possibly-matching string
578 was met in the configuration file input during startup; now it is done
581 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
582 compatible one, to avoid the (poorly documented) possibility of a config
583 file in the working directory redirecting the DB files, possibly correpting
584 some existing file. CVE-2017-10140 assigned for BDB.
586 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
587 cache-hot. Previously, although the result was properly cached, the
588 initial verify call returned a defer.
590 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
591 the main verify for receipient in uncached-mode.
593 JH/22 Retire historical build files to an "unsupported" subdir. These are
594 defined as "ones for which we have no current evidence of testing".
596 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
597 if present. Previously it was ignored.
599 JH/24 Start using specified-initialisers in C structure init coding. This is
600 a C99 feature (it's 2017, so now considered safe).
602 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
603 if was a fixed-sized field and bitmask ops via macros; it is now more
606 PP/07 GitHub PR 56: Apply MariaDB build fix.
607 Patch provided by Jaroslav Škarvada.
609 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
610 during Coverity cleanups [4.87 JH/47]
611 Diagnosis and fix provided by Michael Fischer v. Mollard.
613 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
614 the right size to place the terminating semicolon on its own folded
615 line, the header hash was calculated to an incorrect value thanks to
616 the (relaxed) space the fold became.
618 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
619 and confused the parent.
621 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
622 which could crash as a result. This could lead to undeliverable messages.
624 JH/28 Logging: "next input sent too soon" now shows where input was truncated
627 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
628 matters on fast-turnover and PID-randomising systems, which were getting
629 out-of-order delivery.
631 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
632 a possibly-overlapping copy. The symptom was that "Remote host closed
633 connection in response to HELO" was logged instead of the actual 4xx
636 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
637 Previously only that bufferd was discarded, resulting in SYMTP command
640 JH/32 DKIM: when a message has multiple signatures matching an identity given
641 in dkim_verify_signers, run the dkim acl once for each. Previously only
642 one run was done. Bug 2189.
644 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
645 "panic the current process" to "deliberately defer". The panic log is
646 still written with the problem list name; the mail and reject logs now
647 get a temp-reject line for the message that was being handled, saying
648 something like "domains check lookup or other defer". The SMTP 451
649 message is still "Temporary local problem".
651 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
652 A crafted sequence of BDAT commands could result in in-use memory beeing
653 freed. CVE-2017-16943.
655 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
656 from SMTP input. Previously it was always done; now only done for DATA
657 and not BDAT commands. CVE-2017-16944.
659 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
660 to the message (such as an overlong header line). Previously this was
661 not done and we did not exit BDAT mode. Followon from the previous item
662 though a different problem.
668 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
669 than -2003 did; needs libidn2 in addition to libidn.
671 JH/02 The path option on a pipe transport is now expanded before use.
673 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
674 Patch provided by "Björn", documentation fix added too.
676 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
677 missing a wire-to-host endian conversion.
679 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
680 close after a BDAT command line could be taken as a following command,
681 giving a synch failure. Fix by only checking for synch immediately
682 before acknowledging the chunk.
684 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
685 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
686 macro. Patches provided by Josh Soref.
688 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
689 Previously we did not; the RFC seems ambiguous and VRFY is not listed
690 by IANA as a service extension. However, John Klensin suggests that we
693 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
694 the dkim code may be unix-mode line endings rather than smtp wire-format
695 CRLF, so prepend a CR to any bare LF.
697 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
698 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
700 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
701 the first were themselves being wrongly included in the feed into dkim
702 processing; with most chunk sizes in use this resulted in an incorrect
703 body hash calculated value.
705 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
706 DKIM signature block, for verification. Although advised against by
707 standards it is specifically not ruled illegal.
709 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
711 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
712 missing a body hash (the bh= tag).
714 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
715 It seems that HAProxy sends the Proxy Protocol information in clear and
716 only then does a TLS startup, so do the same.
718 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
719 TCP connections (such as for Spamd) unless the daemon successfully set
720 Fast Open mode on its listening sockets. This fixes breakage seen on
721 too-old kernels or those not configured for Fast Open, at the cost of
722 requiring both directions being enabled for TFO, and TFO never being used
723 by non-daemon-related Exim processes.
725 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
726 endings, at least on the first header line. Try to canonify any that get
727 past that check, despite the cost.
729 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
730 now limited to an arbitrary five deep, while parsing addresses with the
731 strip_excess_angle_brackets option enabled.
733 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
734 instead leave the unprompted TLS handshake in socket buffer for the
735 TLS library to consume.
737 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
739 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
741 JH/16 Drop variables when they go out of scope. Memory management drops a whole
742 region in one operation, for speed, and this leaves assigned pointers
743 dangling. Add checks run only under the testsuite which checks all
744 variables at a store-reset and panics on a dangling pointer; add code
745 explicitly nulling out all the variables discovered. Fixes one known
746 bug: a transport crash, where a dangling pointer for $sending_ip_address
747 originally assigned in a verify callout, is re-used.
749 PP/06 Drop '.' from @INC in various Perl scripts.
751 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
753 PP/08 Reduce a number of compilation warnings under clang; building with
754 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
755 should be warning-free.
757 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
759 HS/01 Fix portability problems introduced by PP/08 for platforms where
760 realloc(NULL) is not equivalent to malloc() [SunOS et al].
762 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
763 chunk. This allows us to accept broken chunked messages. We need a more
764 general solution here.
766 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
767 already-broken messages in the queue.
769 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
771 JH/19 Fix reference counting bug in routing-generated-address tracking.
777 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
778 supports it and a size is available (ie. the sending peer gave us one).
780 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
781 years of being deprecated). The replacements are the ACLs
782 acl_smtp_mime and acl_not_smtp_mime.
784 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
785 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
786 or even an in-clear connection were permitted. Now, if the host lookup
787 was dnssec and dane was requested then the host is only used if the
788 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
789 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
790 if one fails this test.
791 This means that a poorly-configured remote DNS will make it incommunicado;
792 but it protects against a DNS-interception attack on it.
794 JH/04 Bug 1810: make continued-use of an open smtp transport connection
795 non-noisy when a race steals the message being considered.
797 JH/05 If main configuration option tls_certificate is unset, generate a
798 self-signed certificate for inbound TLS connections.
800 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
801 in rewrites and routers.
803 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
804 and logged a warning sing 4.83; now they are a configuration file error.
806 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
807 (lacking @domain). Apply the same qualification processing as RCPT.
809 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
811 JH/10 Support ${sha256:} applied to a string (as well as the previous
814 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
815 a cutthrough deliver is pending, as we always want to make a connection.
816 This also avoids re-routing the message when later placing the cutthrough
817 connection after a verify cache hit.
818 Do not update it with the verify result either.
820 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
821 when routing results in more than one destination address.
823 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
824 signing (which inhibits the cutthrough capability). Previously only
825 the presence of an option was tested; now an expansion evaluating as
826 empty is permissible (obviously it should depend only on data available
827 when the cutthrough connection is made).
829 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
830 the relevant preceding SMTP command did not note the pipelining mode.
832 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
833 Previously they were not counted.
835 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
836 as one having no matching records. Previously we deferred the message
837 that needed the lookup.
839 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
840 distinguished as "(=".
842 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
843 for missing MX records. Previously it only worked for missing A records.
845 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
847 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
848 after the data-go-ahead and data-ack. Patch from Jason Betts.
850 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
851 even for a "none" policy. Patch from Tony Meyer.
853 JH/22 Fix continued use of a connection for further deliveries. If a port was
854 specified by a router, it must also match for the delivery to be
857 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
858 When one of the recipients of a message was unsuitable for the connection
859 (has no matching addresses), we lost track of needing to mark it
860 deferred. As a result mail would be lost.
862 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
864 JH/25 Decoding ACL controls is now done using a binary search; the source code
865 takes up less space and should be simpler to maintain. Merge the ACL
866 condition decode tables also, with similar effect.
868 JH/26 Fix problem with one_time used on a redirect router which returned the
869 parent address unchanged. A retry would see the parent address marked as
870 delivered, so not attempt the (identical) child. As a result mail would
873 JH/27 Fix a possible security hole, wherein a process operating with the Exim
874 UID can gain a root shell. Credit to http://www.halfdog.net/ for
875 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
878 JH/28 Enable {spool,log} filesystem space and inode checks as default.
879 Main config options check_{log,spool}_{inodes,space} are now
880 100 inodes, 10MB unless set otherwise in the configuration.
882 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
883 Previously it only applied to the main-section connection policy
886 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
888 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
889 by me. Added RFC7919 DH primes as an alternative.
891 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
892 are not in the system include path.
894 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
895 GnuTLS, when a session startup failed (eg because the client disconnected)
896 Exim did stdio operations after fclose. This was exposed by a recent
897 change which nulled out the file handle after the fclose.
899 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
900 signed directly by the cert-signing cert, rather than an intermediate
901 OCSP-signing cert. This is the model used by LetsEncrypt.
903 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
905 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
906 an incoming connection.
908 HS/02 Bug 1802: Do not half-close the connection after sending a request
911 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
912 fallback to "prime256v1".
914 JH/34 SECURITY: Use proper copy of DATA command in error message.
915 Could leak key material. Remotely exploitable. CVE-2016-9963.
921 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
922 and 3.4.4 - once the server is enabled to respond to an OCSP request
923 it does even when not requested, resulting in a stapling non-aware
924 client dropping the TLS connection.
926 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
927 support variable-length bit vectors. No functional change.
929 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
930 The I= interface field on outgoing lines is now after the H= remote
931 host field, same as incoming lines. There is a separate
932 outgoing_interface log selector which allows you to disable the
935 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
936 If not running log_selector +smtp_connection the mainlog would be held
937 open indefinitely after a "too many connections" event, including to a
938 deleted file after a log rotate. Leave the per net connection logging
939 leaving it open for efficiency as that will be quickly detected by the
940 check on the next write.
942 HS/01 Bug 1671: Fix post transport crash.
943 Processing the wait-<transport> messages could crash the delivery
944 process if the message IDs didn't exist for some reason. When
945 using 'split_spool_directory=yes' the construction of the spool
946 file name failed already, exposing the same netto behaviour.
948 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
949 mime_regex ACL conditions.
951 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
952 to DSN fail messages (bounces): remote IP, remote greeting, remote response
953 to HELO, local diagnostic string.
955 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
956 log line to debug. Even when configured with a tls authenticator many
957 client connections are expected to not authenticate in this way, so
958 an authenticate fail is not an error.
960 HS/02 Add the Exim version string to the process info. This way exiwhat
961 gives some more detail about the running daemon.
963 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
964 matter for fast-change records such as DNSBLs.
966 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
967 retry record, even if constant. There may be multiple transports with
968 different interface settings and the retry behaviour needs to be kept
971 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
973 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
975 JH/10 Bug 840: fix log_defer_output option of pipe transport
977 JH/11 Bug 830: use same host for all RCPTS of a message, even under
978 hosts_randomize. This matters a lot when combined with mua_wrapper.
980 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
981 ${quote_pgsql:<string>} operator.
983 JH/13 Bug 1708: avoid misaligned access in cached lookup.
985 JH/14 Change header file name for freeradius-client. Relevant if compiling
986 with Radius support; from the Gentoo tree and checked under Fedora.
988 JH/15 Bug 1712: Introduce $prdr_requested flag variable
990 JH/16 Bug 1714: Permit an empty string as expansion result for transport
991 option transport_filter, meaning no filtering.
993 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
995 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
996 defaults to "*" (all hosts). The variable is now available when not built
997 with TLS, default unset, mainly to enable keeping the testsuite sane.
998 If a server certificate is not supplied (via tls_certificate) an error is
999 logged, and clients will find TLS connections fail on startup. Presumably
1000 they will retry in-clear.
1001 Packagers of Exim are strongly encouraged to create a server certificate
1002 at installation time.
1004 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1005 with the $config_file variable.
1007 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1008 in transport context, after the attempt, and per-recipient. The latter type
1009 is per host attempted. The event data is the error message, and the errno
1010 information encodes the lookup type (A vs. MX) used for the (first) host,
1011 and the trailing two digits of the smtp 4xx response.
1013 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1014 to write to mainlog (or rejectlog, paniclog) in the window between file
1015 creation and permissions/ownership being changed. Particularly affects
1016 installations where exicyclog is run as root, rather than exim user;
1017 result is that the running daemon panics and dies.
1019 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1021 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1022 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1023 "pri" and "weight". Note that the previous implicit priority given by the
1024 list order is no longer honoured.
1026 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1027 for DKIM processing.
1029 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1030 by defining SUPPORT_SOCKS.
1032 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1033 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1034 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1035 variables are renamed to proxy_{local,external}_{address,port}.
1037 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1038 for a build by defining SUPPORT_I18N
1040 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1041 of the query string, and make ${quote_redis:} do that quoting.
1043 JH/29 Move Events support from Experimental to mainline, enabled by default
1044 and removable for a build by defining DISABLE_EVENT.
1046 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1048 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1049 cached by the daemon.
1051 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1052 by defining LOOKUP_REDIS. The libhiredis library is required.
1054 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1055 keys are given for lookup.
1057 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1058 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1059 only supported when built with TLS support. The PolarSSL SHA routines
1060 are still used when the TLS library is too old for convenient support.
1062 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1063 openssl_options), for security. OpenSSL forces this from version 1.1.0
1064 server-side so match that on older versions.
1066 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1067 allocation for $value could be released as the expansion processing
1068 concluded, but leaving the global pointer active for it.
1070 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1071 and to use the domains and local_parts ACL conditions.
1073 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1074 incorrectly not doubled on cutthrough transmission, hence seen as a
1075 body-termination at the receiving system - resulting in truncated mails.
1076 Commonly the sender saw a TCP-level error, and retransmitted the message
1077 via the normal store-and-forward channel. This could result in duplicates
1078 received - but deduplicating mailstores were liable to retain only the
1079 initial truncated version.
1081 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1083 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1085 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1086 we're in there, support oversigning also; bug 1309.
1088 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1090 HS/04 Add support for keep_environment and add_environment options.
1092 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1093 either intentional arithmetic overflow during PRNG, or testing config-
1096 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1097 delivery resulted in actual delivery. Cancel cutthrough before DATA
1100 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1101 rejects a recipient: pass the reject to the originator.
1103 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1104 Many were false-positives and ignorable, but it's worth fixing the
1107 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1108 for the new environment-manipulation done at startup. Move the routines
1109 from being local to tls.c to being global via the os.c file.
1111 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1112 an extract embedded as result-arg for a map, the first arg for extract
1113 is unavailable so we cannot tell if this is a numbered or keyed
1114 extraction. Accept either.
1120 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1123 JH/02 The smtp transport option "multi_domain" is now expanded.
1125 JH/03 The smtp transport now requests PRDR by default, if the server offers
1128 JH/04 Certificate name checking on server certificates, when exim is a client,
1129 is now done by default. The transport option tls_verify_cert_hostnames
1130 can be used to disable this per-host. The build option
1131 EXPERIMENTAL_CERTNAMES is withdrawn.
1133 JH/05 The value of the tls_verify_certificates smtp transport and main options
1134 default to the word "system" to access the system default CA bundle.
1135 For GnuTLS, only version 3.0.20 or later.
1137 JH/06 Verification of the server certificate for a TLS connection is now tried
1138 (but not required) by default. The verification status is now logged by
1139 default, for both outbound TLS and client-certificate supplying inbound
1142 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1145 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1146 Status Notification (bounce) messages are now MIME format per RFC 3464.
1147 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1148 under the control of the dsn_advertise_hosts option, and routers may
1149 have a dsn_lasthop option.
1151 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1152 default, modifiable by a malware= option. The list separator for
1153 the options can now be changed in the usual way. Bug 68.
1155 JH/10 The smtp_receive_timeout main option is now expanded before use.
1157 JH/11 The incoming_interface log option now also enables logging of the
1158 local interface on delivery outgoing connections.
1160 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1161 if the interface and destination host and port all match.
1163 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1166 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1167 Patch from Andrew Lewis.
1169 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1170 now supports optional time-restrictions, weighting, and priority
1171 modifiers per server. Patch originally by <rommer@active.by>.
1173 JH/16 The spamd_address main option now supports a mixed list of local
1174 and remote servers. Remote servers can be IPv6 addresses, and
1175 specify a port-range.
1177 JH/17 Bug 68: The spamd_address main option now supports an optional
1178 timeout value per server.
1180 JH/18 Bug 1581: Router and transport options headers_add/remove can
1181 now have the list separator specified.
1183 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1186 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1189 JH/21 Support for the A6 type of dns record is withdrawn.
1191 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1192 rather than the verbs used.
1194 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1195 from 255 to 1024 chars.
1197 JH/24 Verification callouts now attempt to use TLS by default.
1199 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1200 are generic router options now. The defaults didn't change.
1202 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1203 Original patch from Alexander Shikoff, worked over by JH.
1205 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1206 files if ZCAT_COMMAND is not executable.
1208 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1210 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1212 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1213 Normally benign, it bites when the pair was led to by a CNAME;
1214 modern usage is to not canonicalize the domain to a CNAME target
1215 (and we were inconsistent anyway for A-only vs AAAA+A).
1217 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1219 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1220 when evaluating $sender_host_dnssec.
1222 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1223 $sender_helo_dnssec variable.
1225 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1227 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1229 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1231 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1232 documented as working, but never had. Support all but $spam_report.
1234 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1235 added for tls authenticator.
1237 HS/03 Add perl_taintmode main config option
1243 TL/01 When running the test suite, the README says that variables such as
1244 no_msglog_check are global and can be placed anywhere in a specific
1245 test's script, however it was observed that placement needed to be near
1246 the beginning for it to behave that way. Changed the runtest perl
1247 script to read through the entire script once to detect and set these
1248 variables, reset to the beginning of the script, and then run through
1249 the script parsing/test process like normal.
1251 TL/02 The BSD's have an arc4random API. One of the functions to induce
1252 adding randomness was arc4random_stir(), but it has been removed in
1253 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1254 function when detected.
1256 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1257 cause callback expansion.
1259 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1260 syntax errors in an expansion can be treated as a string instead of
1261 logging or causing an error, due to the internal use of bool_lax
1262 instead of bool when processing it.
1264 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1265 server certificates when making smtp deliveries.
1267 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1269 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1271 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1273 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1274 Merged patch from Sebastian Wiedenroth.
1276 JH/05 Fix results-pipe from transport process. Several recipients, combined
1277 with certificate use, exposed issues where response data items split
1278 over buffer boundaries were not parsed properly. This eventually
1279 resulted in duplicates being sent. This issue only became common enough
1280 to notice due to the introduction of connection certificate information,
1281 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1283 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1284 size buffer was used, resulting in syntax errors when an expansion
1287 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1288 version 3.3.6 or later.
1290 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1291 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1292 both become "event_action", the variables become $event_name, $event_data
1293 and $event_defer_errno. There is a new variable $verify_mode, usable in
1294 routers, transports and related events. The tls:cert event is now also
1295 raised for inbound connections, if the main configuration event_action
1298 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1299 early OCSP support, but no stapling (appears to be less than 1.0.0).
1301 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1302 server certificate names available under the smtp transport option
1303 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1306 JH/10 Time-related extraction expansions from certificates now use the main
1307 option "timezone" setting for output formatting, and are consistent
1308 between OpenSSL and GnuTLS compilations. Bug 1541.
1310 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1311 encoded parameter in the incoming message. Bug 1558.
1313 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1314 include certificate info, eximon was claiming there were spoolfile
1317 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1319 JH/14 Log delivery-related information more consistently, using the sequence
1320 "H=<name> [<ip>]" wherever possible.
1322 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1323 are problematic for Debian distribution, omit them from the release
1326 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1328 JH/16 Fix string representation of time values on 64bit time_t architectures.
1331 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1332 output list separator was used.
1337 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1338 checkers that were complaining about end of non-void function with no
1341 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1342 This was a regression introduced in 4.83 by another bugfix.
1344 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1346 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1347 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1353 TF/01 Correctly close the server side of TLS when forking for delivery.
1355 When a message was received over SMTP with TLS, Exim failed to clear up
1356 the incoming connection properly after forking off the child process to
1357 deliver the message. In some situations the subsequent outgoing
1358 delivery connection happened to have the same fd number as the incoming
1359 connection previously had. Exim would try to use TLS and fail, logging
1360 a "Bad file descriptor" error.
1362 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1363 utilities have not been installed.
1365 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1366 temporary space as the ACL may create new global variables.
1368 TL/01 LDAP support uses per connection or global context settings, depending
1369 upon the detected version of the libraries at build time.
1371 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1372 to extract and use the src ip:port in logging and expansions as if it
1373 were a direct connection from the outside internet. PPv2 support was
1374 updated based on HAProxy spec change in May 2014.
1376 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1378 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1379 Properly escape header and check for NULL return.
1381 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1384 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1386 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1387 characters in header names, implemented as a verify condition.
1388 Contributed by Michael Fischer v. Mollard.
1390 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1391 results permerror and temperror. Previous values are deprecated but
1392 still accepted. In a future release, err_perm and err_temp will be
1393 completely removed, which will be a backward incompatibility if the
1394 ACL tests for either of these two old results. Patch contributed by
1395 user bes-internal on the mailing list.
1397 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1399 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1400 selectors, in both main and reject logs.
1402 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1405 JH/07 Add malware type "sock" for talking to simple daemon.
1407 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1409 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1410 routers/transports under cutthrough routing.
1412 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1413 numbers. Touch up "bool" conditional to keep the same definition.
1415 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1417 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1419 JH/12 Expand items in router/transport headers_add or headers_remove lists
1420 individually rather than the list as a whole. Bug 1452.
1422 Required for reasonable handling of multiple headers_ options when
1423 they may be empty; requires that headers_remove items with embedded
1424 colons must have them doubled (or the list-separator changed).
1426 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1427 view the policy declared in the DMARC record. Currently, $dmarc_status
1428 is a combined value of both the record presence and the result of the
1431 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1433 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1434 dnslookup router and the smtp transport (applying to the forward
1437 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1438 of ldap servers used for a specific lookup. Patch provided by Heiko
1441 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1442 New variable $lookup_dnssec_authenticated for observability.
1444 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1445 Patch submitted by Lars Timman.
1447 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1449 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1450 Requires trusted mode and valid format message id, aborts otherwise.
1451 Patch contributed by Heiko Schlichting.
1453 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1454 certextract with support for various fields. Bug 1358.
1456 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1457 is requested by default, modifiable by smtp transport option
1460 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1461 operate on certificate variables to give certificate fingerprints
1462 Also new ${sha256:cert_variable}.
1464 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1466 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1467 Christian Aistleitner.
1469 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1471 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1472 file. Patch from Wolfgang Breyha.
1474 JH/25 Expand the coverage of the delivery $host and $host_address to
1475 client authenticators run in verify callout. Bug 1476.
1477 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1478 align with daemon_smtp_ports. Bug 72.
1480 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1481 support and error reporting did not work properly.
1483 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1484 and is readable. Patch from Andrew Colin Kissa.
1486 TL/14 Enhance documentation of ${run expansion and how it parses the
1487 commandline after expansion, particularly in the case when an
1488 unquoted variable expansion results in an empty value.
1490 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1492 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1493 by renaming away from it. Addresses GH issue 15, reported by
1496 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1498 TL/15 SECURITY: prevent double expansion in math comparison functions
1499 (can expand unsanitized data). Not remotely exploitable.
1506 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1508 PP/02 Make -n do something, by making it not do something.
1509 When combined with -bP, the name of an option is not output.
1511 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1514 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1515 $sender_host_name and config options to manage this, and basic check
1518 PP/05 DSCP support for outbound connections and control modifier for inbound.
1520 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1521 (Only plugin which currently uses this is kerberos4, which nobody should
1522 be using, but we should make it available and other future plugins might
1523 conceivably use it, even though it would break NAT; stuff *should* be
1524 using channel bindings instead).
1526 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1527 name; added for Sendmail compatibility; requires admin caller.
1528 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1529 just ignore it); requires trusted caller.
1530 Also parse but ignore: -Ac -Am -X<logfile>
1533 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1535 TL/02 Add +smtp_confirmation as a default logging option.
1537 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1538 Patch by Magnus Holmgren from 2007-02-20.
1540 TL/04 Bugzilla 1281 - Spec typo.
1541 Bugzilla 1283 - Spec typo.
1542 Bugzilla 1290 - Spec grammar fixes.
1544 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1546 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1548 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1549 mailing list by by Dmitry Isaikin.
1551 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1553 JH/02 Support "G" suffix to numbers in ${if comparisons.
1555 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1557 NM/01 Bugzilla 1197 - Spec typo
1558 Bugzilla 1196 - Spec examples corrections
1560 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1562 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1563 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1566 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1567 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1569 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1570 "acl {{name}{arg}...}", and optional args on acl condition
1573 JH/05 Permit multiple router/transport headers_add/remove lines.
1575 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1577 JH/07 Avoid using a waiting database for a single-message-only transport.
1578 Performance patch from Paul Fisher. Bugzilla 1262.
1580 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1583 JH/09 Add $headers_added variable, with content from use of ACL modifier
1584 add_header (but not yet added to the message). Bugzilla 199.
1586 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1587 Pulled from Bugzilla 817 by Wolfgang Breyha.
1589 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1591 (nb: this is the same fix as in Exim 4.80.1)
1593 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1596 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1599 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1601 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1602 advertise SMTP AUTH mechanism to us, instead of a generic
1603 protocol violation error. Also, make Exim more robust to bad
1604 data from the Dovecot auth socket.
1606 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1608 When a queue runner is handling a message, Exim first routes the
1609 recipient addresses, during which it prunes them based on the retry
1610 hints database. After that it attempts to deliver the message to
1611 any remaining recipients. It then updates the hints database using
1614 So if a recipient address works intermittently, it can get repeatedly
1615 deferred at routing time. The retry hints record remains fresh so the
1616 address never reaches the final cutoff time.
1618 This is a fairly common occurrence when a user is bumping up against
1619 their storage quota. Exim had some logic in its local delivery code
1620 to deal with this. However it did not apply to per-recipient defers
1621 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1623 This change adds a proper retry rule check during routing so that the
1624 final cutoff time is checked against the message's age. We only do
1625 this check if there is an address retry record and there is not a
1626 domain retry record; this implies that previous attempts to handle
1627 the address had the retry_use_local_parts option turned on. We use
1628 this as an approximation for the destination being like a local
1629 delivery, as in LMTP.
1631 I suspect this new check makes the old local delivery cutoff check
1632 redundant, but I have not verified this so I left the code in place.
1634 TF/02 Correct gecos expansion when From: is a prefix of the username.
1636 Test 0254 submits a message to Exim with the header
1640 When I ran the test suite under the user fanf2, Exim expanded
1641 the header to contain my full name, whereas it should have added
1642 a Resent-Sender: header. It erroneously treats any prefix of the
1643 username as equal to the username.
1645 This change corrects that bug.
1647 GF/01 DCC debug and logging tidyup
1648 Error conditions log to paniclog rather than rejectlog.
1649 Debug lines prefixed by "DCC: " to remove any ambiguity.
1651 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1653 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1654 Bug spotted by Jeremy Harris; was flawed since initial commit.
1655 Would have resulted in OCSP responses post-SNI triggering an Exim
1656 NULL dereference and crash.
1658 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1660 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1661 Bug detection, analysis and fix by Samuel Thibault.
1662 Bugzilla 1331, Debian bug #698092.
1664 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1666 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1667 Server implementation by Todd Lyons, client by JH.
1668 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1669 config variable "prdr_enable" controls whether the server
1670 advertises the facility. If the client requests PRDR a new
1671 acl_data_smtp_prdr ACL is called once for each recipient, after
1672 the body content is received and before the acl_smtp_data ACL.
1673 The client is controlled by both of: a hosts_try_prdr option
1674 on the smtp transport, and the server advertisement.
1675 Default client logging of deliveries and rejections involving
1676 PRDR are flagged with the string "PRDR".
1678 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1679 fclose(). Diagnosis by Todd Lyons.
1681 PP/17 Update configure.default to handle IPv6 localhost better.
1682 Patch by Alain Williams (plus minor tweaks).
1685 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1686 This is now consistent with GnuTLS, and is now documented: the
1687 previous undocumented portable approach to treating the option as
1688 unset was to force an expansion failure. That still works, and
1689 an empty string is now equivalent.
1691 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1692 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1693 not performing validation itself.
1695 PP/20 Added force_command boolean option to pipe transport.
1696 Patch from Nick Koston, of cPanel Inc.
1698 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1701 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1703 PP/21 Fix eximon continuous updating with timestamped log-files.
1704 Broken in a format-string cleanup in 4.80, missed when I repaired the
1705 other false fix of the same issue.
1706 Report and fix from Heiko Schlichting.
1709 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1710 Report from Prashanth Katuri.
1712 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1713 It's SecureTransport, so affects any MacOS clients which use the
1714 system-integrated TLS libraries, including email clients.
1716 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1717 using a MIME ACL for non-SMTP local injection.
1718 Report and assistance in diagnosis by Warren Baker.
1720 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1722 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1724 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1725 last id that failed so it may be referenced in subsequent ACL's.
1727 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1730 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1731 ldap library initialization, allowing self-signed CA's to be
1732 used. Also properly sets require_cert option later in code by
1733 using NULL (global ldap config) instead of ldap handle (per
1734 session). Bug diagnosis and testing by alxgomz.
1736 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1737 the src/util/ subdirectory.
1739 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1740 renamed to Transport Post Delivery Action by Jeremy Harris, as
1743 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1744 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1745 redis_servers = needs to be configured which will be used by the redis
1746 lookup. Patch from Warren Baker, of The Packet Hub.
1748 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1750 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1751 hostname or reverse DNS when processing a host list. Used suggestions
1752 from multiple comments on this bug.
1754 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1756 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1757 Missed a few lines, added it to make the runtest require no keyboard
1760 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1761 contains upper case chars. Make router use caseful_local_part.
1763 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1764 support when GnuTLS has been built with p11-kit.
1770 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1772 This, or similar/improved, will also be change PP/11 of 4.82.
1778 PP/01 Handle short writes when writing local log-files.
1779 In practice, only affects FreeBSD (8 onwards).
1780 Bugzilla 1053, with thanks to Dmitry Isaikin.
1782 NM/01 Bugzilla 949 - Documentation tweak
1784 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1787 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1789 PP/02 Implemented gsasl authenticator.
1791 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1793 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1794 `pkg-config foo` for cflags/libs.
1796 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1797 with rest of GSASL and with heimdal_gssapi.
1799 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1800 `pkg-config foo` for cflags/libs for the TLS implementation.
1802 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1803 properties get this fed in as external SSF. A number of robustness
1804 and debugging improvements to the cyrus_sasl authenticator.
1806 PP/08 cyrus_sasl server now expands the server_realm option.
1808 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1809 Patch by Jeremy Harris.
1811 PP/10 Added dbmjz lookup type.
1813 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1815 PP/12 MAIL args handles TAB as well as SP, for better interop with
1816 non-compliant senders.
1817 Analysis and variant patch by Todd Lyons.
1819 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1820 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1821 Patch from Dirk Mueller <dmueller@suse.com>
1823 PP/13 tls_peerdn now print-escaped for spool files.
1824 Observed some $tls_peerdn in wild which contained \n, which resulted
1825 in spool file corruption.
1827 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1828 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1829 or write after TLS renegotiation, which otherwise led to messages
1832 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1833 as a tracking header (ie: a signed header comes before the signature).
1834 Patch from Wolfgang Breyha.
1836 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1837 comma-sep list; embedded commas doubled.
1839 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1841 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1843 Report and patch from Dmitry Banschikov.
1845 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1846 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1847 failures. We appear to now support TLS1.1+ with Exim.
1849 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1850 lets Exim select keys and certificates based upon TLS SNI from client.
1851 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1852 before an outbound SMTP session. New log_selector, +tls_sni.
1854 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1855 NULL dereference. Report and patch from Alun Jones.
1857 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1858 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1859 Not seeing resolver debug output on NetBSD, but suspect this is a
1860 resolver implementation change.
1862 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1863 Left warnings. Added "eximon gdb" invocation mode.
1865 PP/21 Defaulting "accept_8bitmime" to true, not false.
1867 PP/22 Added -bw for inetd wait mode support.
1869 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1870 locate the relevant includes and libraries. Made this the default.
1872 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1873 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1875 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1876 This may cause build issues on older platforms.
1878 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1879 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1880 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1881 Added SNI support via GnuTLS too.
1882 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1884 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1886 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1887 Applied second patch from Janne, implementing suggestion to default
1888 multiple-strings-in-record handling to match SPF spec.
1890 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1892 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1893 read-only, out of scope).
1894 Patch from Wolfgang Breyha, report from Stuart Northfield.
1896 PP/29 Fix three issues highlighted by clang analyser static analysis.
1897 Only crash-plausible issue would require the Cambridge-specific
1898 iplookup router and a misconfiguration.
1899 Report from Marcin Mirosław.
1901 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1903 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1904 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1905 As part of this, removing so much warning spew let me fix some minor
1906 real issues in debug logging.
1908 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1909 assignment on my part. Fixed.
1911 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1912 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1913 Janne Snabb (who went above and beyond: thank you).
1915 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1916 string otherwise requires a connection and a bunch more work and it's
1917 relatively easy to get wrong. Should also expose TLS library linkage
1920 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1921 64-bit ${eval} (JH/03).
1923 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1924 GNU libc to support some of the 64-bit stuff, should not lead to
1925 conflicts. Defined before os.h is pulled in, so if a given platform
1926 needs to override this, it can.
1928 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1929 protection layer was required, which is not implemented.
1930 Bugzilla 1254, patch from Wolfgang Breyha.
1932 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1933 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1934 tls_dhparam take prime identifiers. Also unbreak combination of
1935 OpenSSL+DH_params+TLSSNI.
1937 PP/39 Disable SSLv2 by default in OpenSSL support.
1943 PP/01 Solaris build fix for Oracle's LDAP libraries.
1944 Bugzilla 1109, patch from Stephen Usher.
1946 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1948 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1951 TF/02 Fix a couple more cases where we did not log the error message
1952 when unlink() failed. See also change 4.74-TF/03.
1954 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1955 lock up or crash if it happened to be inside a call to libc when it
1956 got a SIGUSR1 from exiwhat.
1958 The SIGUSR1 handler appends the current process status to the process
1959 log which is later printed by exiwhat. It used to use the general
1960 purpose logging code to do this, but several functions it calls are
1961 not safe for signals.
1963 The new output code in the SIGUSR1 handler is specific to the process
1964 log, and simple enough that it's easy to inspect for signal safety.
1965 Removing some special cases also simplifies the general logging code.
1966 Removing the spurious timestamps from the process log simplifies
1969 TF/04 Improved ratelimit ACL condition.
1971 The /noupdate option has been deprecated in favour of /readonly which
1972 has clearer semantics. The /leaky, /strict, and /readonly update modes
1973 are mutually exclusive. The update mode is no longer included in the
1974 database key; it just determines when the database is updated. (This
1975 means that when you upgrade Exim will forget old rate measurements.)
1977 Exim now checks that the per_* options are used with an update mode that
1978 makes sense for the current ACL. For example, when Exim is processing a
1979 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1980 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1981 must specify per_mail/readonly. If you omit the update mode it defaults to
1982 /leaky where that makes sense (as before) or /readonly where required.
1984 The /noupdate option is now undocumented but still supported for
1985 backwards compatibility. It is equivalent to /readonly except that in
1986 ACLs where /readonly is required you may specify /leaky/noupdate or
1987 /strict/noupdate which are treated the same as /readonly.
1989 A useful new feature is the /count= option. This is a generalization
1990 of the per_byte option, so that you can measure the throughput of other
1991 aggregate values. For example, the per_byte option is now equivalent
1992 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1994 The per_rcpt option has been generalized using the /count= mechanism
1995 (though it's more complicated than the per_byte equivalence). When it is
1996 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1997 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1998 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1999 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2000 Note that using per_rcpt with a non-readonly update mode in more than
2001 one ACL will cause the recipients to be double-counted. (The per_mail
2002 and per_byte options don't have this problem.)
2004 The handling of very low rates has changed slightly. If the computed rate
2005 is less than the event's count (usually one) then this event is the first
2006 after a long gap. In this case the rate is set to the same as this event's
2007 count, so that the first message of a spam run is counted properly.
2009 The major new feature is a mechanism for counting the rate of unique
2010 events. The new per_addr option counts the number of different
2011 recipients that someone has sent messages to in the last time period. It
2012 behaves like per_rcpt if all the recipient addresses are different, but
2013 duplicate recipient addresses do not increase the measured rate. Like
2014 the /count= option this is a general mechanism, so the per_addr option
2015 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2016 example, measure the rate that a client uses different sender addresses
2017 with the options per_mail/unique=$sender_address. There are further
2018 details in the main documentation.
2020 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2022 TF/06 Removed a few PCRE remnants.
2024 TF/07 Automatically extract Exim's version number from tags in the git
2025 repository when doing development or release builds.
2027 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2028 Bugzilla 879. Patch from Paul Fisher.
2030 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2031 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2034 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2036 PP/05 Variable $av_failed, true if the AV scanner deferred.
2037 Bugzilla 1078. Patch from John Horne.
2039 PP/06 Stop make process more reliably on build failure.
2040 Bugzilla 1087. Patch from Heiko Schlittermann.
2042 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2043 Bugzilla 1089. Patch from Heiko Schlittermann.
2045 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2046 Bugzilla 1131. Patch from Holger Weiß.
2048 PP/09 Handle IPv6 addresses with SPF.
2049 Bugzilla 860. Patch from Wolfgang Breyha.
2051 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2053 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2056 PP/11 match_* no longer expand right-hand-side by default.
2057 New compile-time build option, EXPAND_LISTMATCH_RHS.
2058 New expansion conditions, "inlist", "inlisti".
2060 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2062 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2064 PP/14 fix log_write() format string regression from TF/03.
2065 Bugzilla 1152. Patch from Dmitry Isaikin.
2071 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2073 PP/02 Harmonised TLS library version reporting; only show if debugging.
2074 Layout now matches that introduced for other libraries in 4.74 PP/03.
2076 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2078 PP/04 New "dns_use_edns0" global option.
2080 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2083 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2084 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2086 TK/01 Updated PolarSSL code to 0.14.2.
2087 Bugzilla 1097. Patch from Andreas Metzler.
2089 PP/07 Catch divide-by-zero in ${eval:...}.
2090 Fixes bugzilla 1102.
2092 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2095 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2096 format-string attack -- SECURITY: remote arbitrary code execution.
2098 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2099 time unintentionally subject to list matching rules, letting the header
2100 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2101 arbitrary string expansion). This allowed for information disclosure.
2103 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2104 INT_MIN/-1 -- value coerced to INT_MAX.
2110 NM/01 Workaround for PCRE version dependency in version reporting
2113 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2114 This fixes portability to compilers other than gcc, notably
2115 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2117 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2118 makefiles for portability to HP-UX and POSIX correctness.
2120 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2121 Also via indented variable definition in the Makefile.
2122 (Debugging by Oliver Heesakkers).
2124 PP/02 Restore caching of spamd results with expanded spamd_address.
2125 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2127 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2128 Improves build reliability. Fix from: Frank Elsner
2130 NM/02 Fix wide character breakage in the rfc2047 coding
2131 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2133 NM/03 Allow underscore in dnslist lookups
2134 Fixes bug 1026. Patch from Graeme Fowler
2136 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2137 Code patches from Adam Ciarcinski of NetBSD.
2139 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2142 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2143 is logged, to avoid truncation. Patch from John Horne.
2145 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2146 Patch from Jakob Hirsch.
2148 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2149 SQL string expansion failure details.
2150 Patch from Andrey Oktyabrski.
2152 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2153 Patch from Simon Arlott.
2155 PP/09 New lookups functionality failed to compile on old gcc which rejects
2156 extern declarations in function scope.
2157 Patch from Oliver Fleischmann
2159 PP/10 Use sig_atomic_t for flags set from signal handlers.
2160 Check getgroups() return and improve debugging.
2161 Fixed developed for diagnosis in bug 927 (which turned out to be
2164 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2165 Patch from Mark Zealey.
2167 PP/12 Bugzilla 1056: Improved spamd server selection.
2168 Patch from Mark Zealey.
2170 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2171 Based on patch from Heiko Schlittermann.
2173 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2174 Patch from Uwe Doering, sign-off by Michael Haardt.
2176 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2177 variable declaration deep within a block. Bug and patch from
2180 PP/15 lookups-Makefile IRIX compatibility coercion.
2182 PP/16 Make DISABLE_DKIM build knob functional.
2184 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2185 Patch by Simon Arlott
2187 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2188 variable argument macros. Our copy now differs from upstream.
2194 TF/01 Failure to get a lock on a hints database can have serious
2195 consequences so log it to the panic log.
2197 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2198 controlled using the smtp_confirmation log selector.
2200 TF/03 Include the error message when we fail to unlink a spool file.
2202 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2203 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2204 for maintaining out-of-tree patches for some time.
2206 PP/01 Bugzilla 139: Documentation and portability issues.
2207 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2208 Handle per-OS dynamic-module compilation flags.
2210 PP/02 Let /dev/null have normal permissions.
2211 The 4.73 fixes were a little too stringent and complained about the
2212 permissions on /dev/null. Exempt it from some checks.
2213 Reported by Andreas M. Kirchwitz.
2215 PP/03 Report version information for many libraries, including
2216 Exim version information for dynamically loaded libraries. Created
2217 version.h, now support a version extension string for distributors
2218 who patch heavily. Dynamic module ABI change.
2220 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2221 privilege escalation vulnerability whereby the Exim run-time user
2222 can cause root to append content of the attacker's choosing to
2225 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2228 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2229 If dropping privileges for untrusted macros, we disabled normal logging
2230 on the basis that it would fail; for the Exim run-time user, this is not
2231 the case, and it resulted in successful deliveries going unlogged.
2232 Fixed. Reported by Andreas Metzler.
2238 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2239 only prepend for the Resent-* case. Fixes regression introduced in
2240 Exim 4.70 by NM/22 for Bugzilla 607.
2242 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2243 increasing numbers of administrators be bitten by this.
2245 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2247 PP/03 Bugzilla 994: added openssl_options main configuration option.
2249 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2251 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2253 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2255 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2256 without a peer certificate, leading to a segfault because of an
2257 assumption that peers always have certificates. Be a little more
2258 paranoid. Problem reported by Martin Tscholak.
2260 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2261 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2262 NB: ClamAV planning to remove STREAM in "middle of 2010".
2263 CL also introduces -bmalware, various -d+acl logging additions and
2264 more caution in buffer sizes.
2266 PP/09 Implemented reverse_ip expansion operator.
2268 PP/10 Bugzilla 937: provide a "debug" ACL control.
2270 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2272 PP/12 Bugzilla 973: Implement --version.
2274 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2276 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2278 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2280 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2281 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2282 ignore trailing whitespace.
2284 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2286 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2289 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2290 Notification from Dr Andrew Aitchison.
2292 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2293 ExtendedDetectionInfo response format.
2294 Notification from John Horne.
2296 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2299 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2300 XSL and documented dependency on system catalogs, with examples of how
2303 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2306 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2307 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2308 configuration file which is writeable by the Exim user or group.
2310 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2311 of configuration files to cover files specified with the -C option if
2312 they are going to be used with root privileges, not just the default
2315 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2316 option (effectively making it always true).
2318 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2319 files to be used while preserving root privileges.
2321 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2322 that rogue child processes cannot use them.
2324 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2325 run-time user, instead of root.
2327 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2328 Exim run-time user without dropping privileges.
2330 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2331 result string, instead of calling string_vformat() twice with the same
2334 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2335 for other users. Others should always drop root privileges if they use
2336 -C on the command line, even for a whitelisted configure file.
2338 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2340 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2346 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2347 $data_path, and $header_path variables; fixed documentation bugs and
2350 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2351 exipick to access non-standard spools, including the "frozen" queue
2354 NM/01 Bugzilla 965: Support mysql stored procedures.
2355 Patch from Alain Williams
2357 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2359 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2360 Patch from Andreas Metzler
2362 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2363 Patch from Kirill Miazine
2365 NM/05 Bugzilla 671: Added umask to procmail example.
2367 JJ/03 installed exipick 20100323.0, fixing doc bug
2369 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2370 directory. Notification and patch from Dan Rosenberg.
2372 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2374 TK/02 Improve log output when DKIM signing operation fails.
2376 MH/01 Treat the transport option dkim_domain as a colon separated
2377 list, not as a single string, and sign the message with each element,
2378 omitting multiple occurences of the same signer.
2380 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2381 Bugzilla 985, 986. Patch by Simon Arlott
2383 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2384 Patch by Simon Arlott
2386 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2387 MBX locking. Notification from Dan Rosenberg.
2393 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2395 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2397 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2399 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2401 NM/04 Bugzilla 915: Flag broken perl installation during build.
2407 TK/01 Added patch by Johannes Berg that expands the main option
2408 "spamd_address" if it starts with a dollar sign.
2410 TK/02 Write list of recipients to X-Envelope-Sender header when building
2411 the mbox-format spool file for content scanning (suggested by Jakob
2414 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2415 (http://www.dcc-servers.net/) support via dccifd. Activated by
2416 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2418 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2419 by Mark Daniel Reidel <mr@df.eu>.
2421 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2422 When building exim an external PCRE library is now needed -
2423 PCRE is a system library on the majority of modern systems.
2424 See entry on PCRE_LIBS in EDITME file.
2426 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2427 conversation. Added nologin parameter to request.
2428 Patch contributed by Kirill Miazine.
2430 TF/01 Do not log submission mode rewrites if they do not change the address.
2432 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2434 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2435 log files in place. Contributed by Roberto Lima.
2437 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2439 TF/03 Bugzilla 615: When checking the local_parts router precondition
2440 after a local_part_suffix or local_part_prefix option, Exim now
2441 does not use the address's named list lookup cache, since this
2442 contains cached lookups for the whole local part.
2444 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2445 Robert Millan. Documentation is in experimental-spec.txt.
2447 TF/04 Bugzilla 668: Fix parallel build (make -j).
2449 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2451 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2452 Patch provided by Jan Srzednicki.
2454 TF/05 Leading white space used to be stripped from $spam_report which
2455 wrecked the formatting. Now it is preserved.
2457 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2458 that they are available at delivery time.
2460 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2462 TF/08 TLS error reporting now respects the incoming_interface and
2463 incoming_port log selectors.
2465 TF/09 Produce a more useful error message if an SMTP transport's hosts
2466 setting expands to an empty string.
2468 NM/06 Bugzilla 744: EXPN did not work under TLS.
2469 Patch provided by Phil Pennock.
2471 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2472 Patch provided by Richard Godbee.
2474 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2475 acl_smtp_notquit, added index entry.
2477 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2478 Patch provided by Eugene Bujak.
2480 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2481 accept(). Patch provided by Maxim Dounin.
2483 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2484 Patch provided by Phil Pennock.
2486 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2488 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2489 Patch provided by Brad "anomie" Jorsch.
2491 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2492 Patch provided by Dean Brooks.
2494 TK/05 Add native DKIM support (does not depend on external libraries).
2496 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2497 Patch provided by Graeme Fowler.
2499 NM/16 Bugzilla 851: Documentation example syntax fix.
2501 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2503 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2506 NM/19 Bugzilla 745: TLS version reporting.
2507 Patch provided by Phil Pennock.
2509 NM/20 Bugzilla 167: bool: condition support.
2510 Patch provided by Phil Pennock.
2512 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2513 clients. Patch provided by Phil Pennock.
2515 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2516 Patch provided by Brad "anomie" Jorsch.
2518 NM/23 Bugzilla 687: Fix misparses in eximstats.
2519 Patch provided by Heiko Schlittermann.
2521 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2522 Patch provided by Heiko Schlittermann.
2524 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2525 plus update to original patch.
2527 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2529 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2530 Patch provided by David Brownlee.
2532 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2534 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2536 NM/30 Bugzilla 888: TLS documentation bugfixes.
2538 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2540 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2541 Unlike the original bugzilla I have changed all shell scripts in src tree.
2543 NM/33 Bugzilla 898: Transport filter timeout fix.
2544 Patch by Todd Rinaldo.
2546 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2547 Patch by Serge Demonchaux.
2549 NM/35 Bugzilla 39: Base64 decode bug fixes.
2550 Patch by Jakob Hirsch.
2552 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2554 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2556 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2558 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2564 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2565 ALT-N's libdkim that I have put here:
2566 http://duncanthrax.net/exim-experimental/
2568 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2569 were called 'true' and it seems that C99 defines that as a reserved
2570 keyword to be used with 'bool' variable types. That means you could
2571 not include C99-style headers which use bools without triggering
2572 build errors in sieve.c.
2574 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2575 as mailq or other aliases. Changed the --help handling significantly
2576 to do whats expected. exim_usage() emits usage/help information.
2578 SC/01 Added the -bylocaldomain option to eximstats.
2580 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2582 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2584 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2590 PH/01 Another patch from the Sieve maintainer.
2592 PH/02 When an IPv6 address is converted to a string for single-key lookup
2593 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2594 dots are used instead of colons so that keys in lsearch files need not
2595 contain colons. This was done some time before quoting was made available
2596 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2597 (notated using the quote facility) so as to distinguish them from IPv4
2598 keys. This meant that lookups for IP addresses in host lists did not work
2599 for iplsearch lookups.
2601 This has been fixed by arranging for IPv6 addresses to be expressed with
2602 colons if the lookup type is iplsearch. This is not incompatible, because
2603 previously such lookups could never work.
2605 The situation is now rather anomalous, since one *can* have colons in
2606 ordinary lsearch keys. However, making the change in all cases is
2607 incompatible and would probably break a number of configurations.
2609 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2612 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2613 conversion specification without a maximum field width, thereby enabling
2614 a rogue spamd server to cause a buffer overflow. While nobody in their
2615 right mind would setup Exim to query an untrusted spamd server, an
2616 attacker that gains access to a server running spamd could potentially
2617 exploit this vulnerability to run arbitrary code as the Exim user.
2619 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2620 $primary_hostname instead of what libspf2 thinks the hosts name is.
2622 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2623 a directory entry by the name of the lookup key. Previously, if a
2624 symlink pointed to a non-existing file or a file in a directory that
2625 Exim lacked permissions to read, a lookup for a key matching that
2626 symlink would fail. Now it is enough that a matching directory entry
2627 exists, symlink or not. (Bugzilla 503.)
2629 PH/03 The body_linecount and body_zerocount variables are now exported in the
2632 PH/04 Added the $dnslist_matched variable.
2634 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2635 This means they are set thereafter only if the connection becomes
2638 PH/06 Added the client_condition to authenticators so that some can be skipped
2639 by clients under certain conditions.
2641 PH/07 The error message for a badly-placed control=no_multiline_responses left
2642 "_responses" off the end of the name.
2644 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2646 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2647 (without spaces) instead of just copying the configuration text.
2649 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2651 PH/11 Added $max_received_linelength.
2653 PH/12 Added +ignore_defer and +include_defer to host lists.
2655 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2656 way in which PCRE > 7.0 is built.
2658 PH/14 Implemented queue_only_load_latch.
2660 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2661 MAIL command. The effect was to mangle the value on 64-bit systems.
2663 PH/16 Another patch from the Sieve maintainer.
2665 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2667 PH/18 If a system quota error occurred while trying to create the file for
2668 a maildir delivery, the message "Mailbox is full" was not appended to the
2669 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2670 only to a quota excession during the actual writing of the file.
2672 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2673 characters?) which causes problems in log lines. The DN values are now
2674 passed through string_printing() before being added to log lines.
2676 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2677 and InterBase are left for another time.)
2679 PH/21 Added message_body_newlines option.
2681 PH/22 Guard against possible overflow in moan_check_errorcopy().
2683 PH/23 POSIX allows open() to be a macro; guard against that.
2685 PH/24 If the recipient of an error message contained an @ in the local part
2686 (suitably quoted, of course), incorrect values were put in $domain and
2687 $local_part during the evaluation of errors_copy.
2693 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2694 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2697 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2698 issue a MAIL command.
2700 PH/02 In an ACL statement such as
2702 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2704 if a client was not listed at all, or was listed with a value other than
2705 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2706 the condition was not true (as it should be), so access was not denied.
2707 The bug was that the ! inversion was incorrectly passed on to the second
2708 item. This has been fixed.
2710 PH/03 Added additional dnslists conditions == and =& which are different from
2711 = and & when the dns lookup returns more than one IP address.
2713 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2714 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2716 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2717 FSYNC, which compiles an option called disable_fsync that allows for
2718 bypassing fsync(). The documentation is heavily laced with warnings.
2720 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2722 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2723 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2724 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2725 including adding "make clean"; (3) Added -fPIC when compiling the test
2726 dynamically loaded module, to get rid of a warning.
2728 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2729 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2730 = 0s. The bug is otherwise harmless.
2732 PH/07 There was a bug in the dovecot authenticator such that the value of
2733 $auth1 could be overwritten, and so not correctly preserved, after a
2734 successful authentication. This usually meant that the value preserved by
2735 the server_setid option was incorrect.
2737 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2739 PH/09 Installed PCRE release 7.0.
2741 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2742 run for batched SMTP input. It is now run at the start of every message
2743 in the batch. While fixing this I discovered that the process information
2744 (output by running exiwhat) was not always getting set for -bs and -bS
2745 input. This is fixed, and it now also says "batched" for BSMTP.
2747 PH/11 Added control=no_pipelining.
2749 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2750 patch, slightly modified), and move the expansion of helo_data till after
2751 the connection is made in the smtp transport (so it can use these
2754 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2756 PH/14 Added log_selector = +pid.
2758 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2760 PH/16 Add ${if forany and ${if forall.
2762 PH/17 Added dsn_from option to vary the From: line in DSNs.
2764 PH/18 Flush SMTP output before performing a callout, unless control =
2765 no_callout_flush is set.
2767 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2768 was true (the default) a successful delivery failed to delete the retry
2769 item, thus causing premature timeout of the address. The bug is now
2772 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2774 PH/21 Long custom messages for fakedefer and fakereject are now split up
2775 into multiline responses in the same way that messages for "deny" and
2776 other ACL rejections are.
2778 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2779 with slight modification.
2781 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2782 draft, changing the syntax and factoring some duplicate code".
2784 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2785 for deliveries of the second and subsequent messages over the same SMTP
2788 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2789 ${reduce, with only minor "tidies".
2791 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2793 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2794 expansion side effects.
2796 PH/27 When a message times out after an over-quota error from an Exim-imposed
2797 quota, the bounce message says "mailbox is full". This message was not
2798 being given when it was a system quota that was exceeded. It now should
2801 MH/03 Made $recipients available in local_scan(). local_scan() already has
2802 better access to the recipient list through recipients_list[], but
2803 $recipients can be useful in postmaster-provided expansion strings.
2805 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2806 in the case of a MAIL command with additional options following the
2807 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2808 were accidentally chopped off.
2810 PH/29 SMTP synchronization checks are implemented when a command is read -
2811 there is a check that no more input is waiting when there shouldn't be
2812 any. However, for some commands, a delay in an ACL can mean that it is
2813 some time before the response is written. In this time, more input might
2814 arrive, invalidly. So now there are extra checks after an ACL has run for
2815 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2816 pipelining has not been advertised.
2818 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2820 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2821 returned in the SMTP response when smtp_return_error_details was false.
2822 This has been fixed.
2824 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2825 instead of the C I/O that was originally supplied, because problems were
2826 reported on Solaris.
2828 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2829 Exim which did not show up earlier: it was assuming that a call to
2830 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2831 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2832 was a macro that became an assignment, so it seemed to work. This has
2833 changed to a proper function call with a void return, hence the compile
2834 error. Exim's code has been fixed.
2836 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2839 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2841 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2843 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2844 because it turns out to be too big or there is a timeout) there is no
2845 "Completed" line in the log. When some messages of this type were
2846 selected by exigrep, they were listed as "not completed". Others were
2847 picked up by some special patterns. I have improved the selection
2848 criteria to be more general.
2850 PH/38 The host_find_failed option in the manualroute router can now be set
2851 to "ignore", to completely ignore a host whose IP address cannot be
2852 found. If all hosts are ignored, the behaviour is controlled by the new
2853 host_all_ignored option.
2855 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2856 homing or because of multiple MX records with /mx) generated more than
2857 one IP address, and the following item turned out to be the local host,
2858 all the secondary addresses of the first item were incorrectly removed
2859 from the list, along with the local host and any following hosts (which
2860 is what is supposed to happen).
2862 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2863 whoever called Exim into the -H file. In the case of the daemon it was
2864 behaving confusingly. When first started, it used values for whoever
2865 started the daemon, but after a SIGHUP it used the Exim user (because it
2866 calls itself on a restart). I have changed the code so that it now always
2869 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2870 message are rejected with the same error (e.g. no authentication or bad
2871 sender address), and a DATA command is nevertheless sent (as can happen
2872 with PIPELINING or a stupid MUA), the error message that was given to the
2873 RCPT commands is included in the rejection of the DATA command. This is
2874 intended to be helpful for MUAs that show only the final error to their
2877 PH/42 Another patch from the Sieve maintainer.
2879 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2880 Eximstats - Fixed some broken HTML links and added missing column headers
2882 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2883 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2885 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2887 PH/43 Yet another patch from the Sieve maintainer.
2889 PH/44 I found a way to check for a TCP/IP connection going away before sending
2890 the response to the final '.' that terminates a message, but only in the
2891 case where the client has not sent further data following the '.'
2892 (unfortunately, this is allowed). However, in many cases there won't be
2893 any further data because there won't be any more messages to send. A call
2894 to select() can be used: if it shows that the input is "ready", there is
2895 either input waiting, or the socket has been closed. An attempt to read
2896 the next input character can distinguish the two cases. Previously, Exim
2897 would have sent an OK response which the client would never have see.
2898 This could lead to message repetition. This fix should cure that, at
2899 least in a lot of common cases.
2901 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2902 advertised in response to EHLO.
2908 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2909 fixed by 4.65/MH/01 (is this a record?) are fixed:
2911 (i) An empty string was always treated as zero by the numeric comparison
2912 operators. This behaviour has been restored.
2914 (ii) It is documented that the numeric comparison operators always treat
2915 their arguments as decimal numbers. This was broken in that numbers
2916 starting with 0 were being interpreted as octal.
2918 While fixing these problems I realized that there was another issue that
2919 hadn't been noticed. Values of message_size_limit (both the global option
2920 and the transport option) were treated as octal if they started with 0.
2921 The documentation was vague. These values are now always treated as
2922 decimal, and I will make that clear in the documentation.
2928 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2929 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2932 MH/01 Don't check that the operands of numeric comparison operators are
2933 integers when their expansion is in "skipping" mode (fixes bug
2934 introduced by 4.64-PH/07).
2936 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2937 child addresses, Exim now panics and dies. Previously, because the count
2938 is held in a short int, deliveries were likely to be lost. As such a
2939 large number of recipients for a single message is ridiculous
2940 (performance will be very, very poor), I have chosen to impose a limit
2941 rather than extend the field.
2947 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2948 leftover -K file (the existence of which was triggered by #402).
2949 While we were at it, introduced process PID as part of the -K
2950 filename. This should rule out race conditions when creating
2953 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2954 processing considerably. Previous code took too long for large mails,
2955 triggering a timeout which in turn triggers #401.
2957 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2958 in the DK code in transports.c. sendfile() is not really portable,
2959 hence the _LINUX specificness.
2961 TF/01 In the add_headers option to the mail command in an Exim filter,
2962 there was a bug that Exim would claim a syntax error in any
2963 header after the first one which had an odd number of characters
2966 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2967 callout verification, Exim cached a "reject" for the entire domain. This
2968 is correct for most verifications, but it is not correct for a recipient
2969 verification with use_sender or use_postmaster set, because in that case
2970 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2971 case of MAIL FROM:<> rejection from other early rejections (e.g.
2972 rejection of HELO). When verifying a recipient using a non-null MAIL
2973 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2974 Whatever the result of the callout, the value of the domain cache is
2975 left unchanged (for any other kind of callout, getting as far as trying
2976 RCPT means that the domain itself is ok).
2978 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2981 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2982 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2983 session, the daemon ignores ECONNECT errors and logs others; it now
2984 ignores EPIPE as well.
2986 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2987 (quoted-printable decoding).
2989 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2990 later the small subsequent patch to fix an introduced bug.
2992 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2994 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2996 PH/08 An error is now given if message_size_limit is specified negative.
2998 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2999 to be given (somewhat) arbitrary names.
3001 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3004 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3005 miscellaneous code fixes
3007 PH/10 Added the log_reject_target ACL modifier to specify where to log
3010 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3011 hostname. This is wrong, because it relates to the incoming message (and
3012 probably the interface on which it is arriving) and not to the outgoing
3013 callout (which could be using a different interface). This has been
3014 changed to use the value of the helo_data option from the smtp transport
3015 instead - this is what is used when a message is actually being sent. If
3016 there is no remote transport (possible with a router that sets up host
3017 addresses), $smtp_active_hostname is used.
3019 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3020 tweaks were necessary in order to get it to work (see also 21 below):
3021 (a) The code assumed that strncpy() returns a negative number on buffer
3022 overflow, which isn't the case. Replaced with Exim's string_format()
3024 (b) There were several signed/unsigned issues. I just did the minimum
3025 hacking in of casts. There is scope for a larger refactoring.
3026 (c) The code used strcasecmp() which is not a standard C function.
3027 Replaced with Exim's strcmpic() function.
3028 (d) The code set only $1; it now sets $auth1 as well.
3029 (e) A simple test gave the error "authentication client didn't specify
3030 service in request". It would seem that Dovecot has changed its
3031 interface. Fortunately there's a specification; I followed it and
3032 changed what the client sends and it appears to be working now.
3034 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3037 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3038 address A is aliased to B and C, where B exists and C does not. Without
3039 -v the output is "A verified" because verification stops after a
3040 successful redirection if more than one address is generated. However,
3041 with -v the child addresses are also verified. Exim was outputting "A
3042 failed to verify" and then showing the successful verification for C,
3043 with its parentage. It now outputs "B failed to verify", showing B's
3044 parentage before showing the successful verification of C.
3046 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3047 look up a TXT record in a specific list after matching in a combined
3050 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3051 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3052 they consult the DNS. I had assumed they would set it the way they
3053 wanted; and indeed my experiments on Linux seem to show that in some
3054 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3055 To be on the safe side, however, I have now made the interface to
3056 host_find_byname() similar to host_find_bydns(), with an argument
3057 containing the DNS resolver options. The host_find_byname() function now
3058 sets these options at its start, just as host_find_bydns() does. The smtp
3059 transport options dns_qualify_single and dns_search_parents are passed to
3060 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3061 of host_find_byname() use the default settings of RES_DEFNAMES
3062 (qualify_single) but not RES_DNSRCH (search_parents).
3064 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3065 spool_read_header() do less string testing, by means of a preliminary
3066 switch on the second character of optional "-foo" lines. (This is
3067 overdue, caused by the large number of possibilities that now exist.
3068 Originally there were few.) While I was there, I also converted the
3069 str(n)cmp tests so they don't re-test the leading "-" and the first
3070 character, in the hope this might squeeze out yet more improvement.
3072 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3073 flag allowing group syntax was set by the header_syntax check but not
3074 turned off, possible causing trouble later; (2) The flag was not being
3075 set at all for the header_verify test, causing "group"-style headers to
3076 be rejected. I have now set it in this case, and also caused header_
3077 verify to ignore an empty address taken from a group. While doing this, I
3078 came across some other cases where the code for allowing group syntax
3079 while scanning a header line wasn't quite right (mostly, not resetting
3080 the flag correctly in the right place). These bugs could have caused
3081 trouble for malformed header lines. I hope it is now all correct.
3083 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3084 with the "reply" argument non-NULL. The code, however (which originally
3085 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3086 but it didn't always do it. This confused somebody who was copying the
3087 code for some other use. I have removed all the tests.
3089 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3090 feature that was used to support insecure browsers during the U.S. crypto
3091 embargo. It requires special client support, and Exim is probably the
3092 only MTA that supported it -- and would never use it because real RSA is
3093 always available. This code has been removed, because it had the bad
3094 effect of slowing Exim down by computing (never used) parameters for the
3095 RSA_EXPORT functionality.
3097 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3098 authenticator to fail if there's a tab character in the incoming data
3099 (there should never be unless someone is messing about, as it's supposed
3100 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3101 if the connection is using TLS or if the remote IP is the same as the
3102 local IP, and the "valid-client-cert option" if a client certificate has
3105 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3106 authenticators. This can be used for authorization after authentication
3107 succeeds. (In the case of plaintext, it servers for both authentication
3110 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3111 if any retry times were supplied.
3113 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3114 connection, where there is no client IP address to check. In this
3115 situation, the verify now always succeeds.
3117 PH/25 Applied John Jetmore's -Mset patch.
3119 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3121 PH/27 In a string expansion for a processed (not raw) header when multiple
3122 headers of the same name were present, leading whitespace was being
3123 removed from all of them, but trailing whitespace was being removed only
3124 from the last one. Now trailing whitespace is removed from each header
3125 before concatenation. Completely empty headers in a concatenation (as
3126 before) are ignored.
3128 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3129 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3131 PH/29 [Removed. This was a change that I later backed out, and forgot to
3132 correct the ChangeLog entry (that I had efficiently created) before
3133 committing the later change.]
3135 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3136 address errors (4xx response to RCPT) over the same connection as other
3137 messages routed to the same hosts. Such deliveries are always "forced",
3138 so retry times are not inspected. This resulted in far too many retries
3139 for the affected addresses. The effect occurred only when there were more
3140 hosts than the hosts_max_try setting in the smtp transport when it had
3141 the 4xx errors. Those hosts that it had tried were not added to the list
3142 of hosts for which the message was waiting, so if all were tried, there
3143 was no problem. Two fixes have been applied:
3145 (i) If there are any address or message errors in an SMTP delivery, none
3146 of the hosts (tried or untried) are now added to the list of hosts
3147 for which the message is waiting, so the message should not be a
3148 candidate for sending over the same connection that was used for a
3149 successful delivery of some other message. This seems entirely
3150 reasonable: after all the message is NOT "waiting for some host".
3151 This is so "obvious" that I'm not sure why it wasn't done
3152 previously. Hope I haven't missed anything, but it can't do any
3153 harm, as the worst effect is to miss an optimization.
3155 (ii) If, despite (i), such a delivery is accidentally attempted, the
3156 routing retry time is respected, so at least it doesn't keep
3157 hammering the server.
3159 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3160 in ${readsocket because some servers need this prod.
3162 PH/32 Added some extra debug output when updating a wait-xxx database.
3164 PH/33 The hint "could be header name not terminated by colon", which has been
3165 given for certain expansion errors for a long time, was not being given
3166 for the ${if def:h_colon_omitted{... case.
3168 PH/34 The spec says: "With one important exception, whenever a domain list is
3169 being scanned, $domain contains the subject domain." There was at least
3170 one case where this was not true.
3172 PH/35 The error "getsockname() failed: connection reset by peer" was being
3173 written to the panic log as well as the main log, but it isn't really
3174 panic-worthy as it just means the connection died rather early on. I have
3175 removed the panic log writing for the ECONNRESET error when getsockname()
3178 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3179 runs only) independently of the message's sender address. This meant
3180 that, if the 4xx error was in fact related to the sender, a different
3181 message to the same recipient with a different sender could confuse
3182 things. In particular, this can happen when sending to a greylisting
3183 server, but other circumstances could also provoke similar problems.
3184 I have changed the default so that the retry time for these errors is now
3185 based a combination of the sender and recipient addresses. This change
3186 can be overridden by setting address_retry_include_sender=false in the
3189 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3190 remote server are returned as part of bounce messages. This was not
3191 happening for LMTP over a pipe (the lmtp transport), but now it is the
3192 same for both kinds of LMTP.
3194 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3195 in header lines that were in fact CNAMEs. This is no longer the case.
3197 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3198 and queue runs started by the daemon processed all messages. This has
3199 been fixed so that -R and -S can now usefully be given with -q<time>.
3201 PH/40 Import PCRE release 6.7 (fixes some bugs).
3203 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3205 PH/42 Give an error if -q is specified more than once.
3207 PH/43 Renamed the variables $interface_address and $interface_port as
3208 $received_ip_address and $received_port, to make it clear that these
3209 values apply to message reception, and not to the outgoing interface when
3210 a message is delivered. (The old names remain recognized, of course.)
3212 PH/44 There was no timeout on the connect() call when using a Unix domain
3213 socket in the ${readsocket expansion. There now is.
3215 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3216 be meaningful with "accept".
3218 SC/01 Eximstats V1.43
3219 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3221 SC/02 Eximstats V1.44
3222 Use a glob alias rather than an array ref in the generated
3223 parser. This improves both readability and performance.
3225 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3226 Collect SpamAssassin and rejection statistics.
3227 Don't display local sender or destination tables unless
3228 there is data to show.
3229 Added average volumes into the top table text output.
3231 SC/04 Eximstats V1.46
3232 Collect data on the number of addresses (recipients)
3233 as well as the number of messages.
3235 SC/05 Eximstats V1.47
3236 Added 'Message too big' to the list of mail rejection
3237 reasons (thanks to Marco Gaiarin).
3239 SC/06 Eximstats V1.48
3240 Mainlog lines which have GMT offsets and are too short to
3241 have a flag are now skipped.
3243 SC/07 Eximstats V1.49 (Alain Williams)
3244 Added the -emptyok flag.
3246 SC/08 Eximstats V1.50
3247 Fixes for obtaining the IP address from reject messages.
3249 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3250 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3251 whitespace changes from 4.64-PH/27
3253 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3256 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3257 are found, allow negative numbers in numeric criteria)
3259 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3261 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3262 to match changes made in 4.64-PH/43
3264 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3266 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3267 "domain" is actually an IP address, and force a failure. This locks out
3268 those revolvers/nameservers that support "A-for-A" lookups, in
3269 contravention of the specifications.
3271 PH/48 When a host name was looked up from an IP address, and the subsequent
3272 forward lookup of the name timed out, the host name was left in
3273 $sender_host_name, contrary to the specification.
3275 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3276 restricted to single-key lookups, Exim was not diagnosing an error if
3277 * or *@ was used with a query-style lookup.
3279 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3281 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3282 long ago, but noone interested enough thought of it. Let's just say that
3283 the "1.1" means that there are some new functions that weren't there at
3284 some point in the past.
3286 PH/51 Error processing for expansion failure of helo_data from an smtp
3287 transport during callout processing was broken.
3289 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3290 tested/used via the -bh/-bhc/-bs options.
3292 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3293 bug, fixed in subsequent PCRE releases).
3295 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3296 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3298 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3304 SC/01 Use a glob alias rather than an array ref in eximstats generated
3305 parser. This improves both readability and performance.
3307 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3308 Don't display local sender or destination tables in eximstats unless
3309 there is data to show.
3310 Added average volumes into the eximstats top table text output.
3312 SC/03 Collect data on the number of addresses (recipients) as well
3313 as the number of messages in eximstats.
3315 TF/01 Correct an error in the documentation for the redirect router. Exim
3316 does (usually) call initgroups() when daemonizing.
3318 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3319 with consistent privilege compared to when running as a daemon.
3321 TF/03 Note in the spec that $authenticated_id is not set for local
3322 submissions from trusted users.
3324 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3325 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3327 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3328 by adding some example configuration directives to the default
3329 configuration file. A little bit of work is required to uncomment the
3330 directives and define how usernames and passwords are checked, but
3331 there is now a framework to start from.
3333 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3334 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3335 without this. I don't know how relevant this is to other LDAP libraries.
3337 PH/02 Add the verb name to the "unknown ACL verb" error.
3339 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3341 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3343 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3344 directory not expanded when it should be if an expanded home directory
3345 was set for the address (which is overridden by the transport).
3347 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3350 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3351 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3352 because it is too late at that time, and has no effect.
3354 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3355 security issue with \' (bugzilla #107). I could not use the
3356 PQescapeStringConn() function, because it needs a PGconn value as one of
3359 PH/08 When testing addresses using -bt, indicate those final addresses that
3360 are duplicates that would not cause an additional delivery. At least one
3361 person was confused, thinking that -bt output corresponded to deliveries.
3362 (Suppressing duplicates isn't a good idea as you lose the information
3363 about possibly different redirections that led to the duplicates.)
3365 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3366 systems where poll() doesn't work, in particular OS X.
3368 PH/10 Added more information to debugging output for retry time not reached.
3370 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3371 operations in malware.c.
3373 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3376 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3377 syslog_duplication set false, log lines that would normally be written
3378 both the the main log and to the reject log were not written to syslog at
3381 PH/14 In the default configuration, change the use of "message" in ACL warn
3382 statements to "add_header".
3384 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3385 not followed by a command (e.g. "seen endif").
3387 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3388 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3391 PH/17 Added extra conditions to the default value of delay_warning_condition
3395 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3396 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3397 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3400 The Auto-Submitted: and various List- headers are standardised, whereas I
3401 don't think Precedence: ever was.
3403 PH/18 Refactored debugging code in route_finduser() to show more information,
3404 in particular, the error code if getpwnam() issues one.
3406 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3407 This is apparently needed in addition to the PH/07 change above to avoid
3408 any possible encoding problems.
3410 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3411 but not after initializing Perl.
3413 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3414 output them only if debugging. By default they are written stderr,
3415 apparently, which is not desirable.
3417 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3420 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3423 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3425 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3426 authenticated or an ident call has been made. Suppress the default
3427 values for $authenticated_id and $authenticated_sender (but permit -oMai
3428 and -oMas) when testing with -bh.
3430 PH/24 Re-jigged the order of the tests in the default configuration so that the
3431 tests for valid domains and recipients precede the DNS black list and CSA
3432 tests, on the grounds that those ones are more expensive.
3434 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3435 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3436 This bug exists in every version of Exim that I still have, right back to
3439 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3440 However, an attempt to turn on case-sensitivity in a regex key by
3441 including (?-i) didn't work because the subject string was already
3442 lowercased, and the effects were non-intuitive. It turns out that a
3443 one-line patch can be used to allow (?-i) to work as expected.
3449 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3450 other effects) broke the use of negated acl sub-conditions.
3452 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3455 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3456 "Deny" causes Exim to reject the incoming connection with a 554 error.
3457 Unfortunately, if there is a major crisis, such as a disk failure,
3458 tcp-wrappers gives "deny", whereas what one would like would be some
3459 kind of temporary error. A kludge has been added to help with this.
3460 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3461 554 error is used if errno is still zero or contains ENOENT (which occurs
3462 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3465 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3467 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3468 errors. Otherwise a message that provokes a temporary error (when other
3469 messages do not) can cause a whole host to time out.
3471 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3472 addresses were routed directly to files or pipes from a redirect router.
3473 File deliveries just didn't batch; pipe deliveries might have suffered
3476 PH/06 A failure to get a lock for a hints database would erroneously always say
3477 "Failed to get write lock", even when it was really a read lock.
3479 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3480 of 0600. This has been changed to use the value of the lockfile_mode
3481 option (which defaults to 0600).
3483 PH/08 Applied small patch from the Sieve maintainer.
3485 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3486 folder from quota calculations, a direct delivery into this folder messed
3487 up the contents of the maildirsize file. This was because the regex was
3488 used only to exclude .Trash (or whatever) when the size of the mailbox
3489 was calculated. There was no check that a delivery was happening into an
3490 excluded directory. This bug has been fixed by ignoring all quota
3491 processing for deliveries into excluded directories.
3493 PH/10 Added the maildirfolder_create_regex option to appendfile.
3499 PH/01 The code for finding all the local interface addresses on a FreeBSD
3500 system running IPv6 was broken. This may well have applied to all BSD
3501 systems, as well as to others that have similar system calls. The broken
3502 code found IPv4 interfaces correctly, but gave incorrect values for the
3503 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3504 that it would not match correctly against @[] and not recognize the IPv6
3507 PH/02 The ipliteral router was not recognizing addresses of the form user@
3508 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3510 PH/03 Added disable_ipv6.
3512 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3513 decoded form, because it is most often used to construct To: headers
3514 lines in autoreplies, and the decoded form may well be syntactically
3515 invalid. However, $reply_address has leading white space removed, and all
3516 newlines turned into spaces so that the autoreply transport does not
3519 PH/05 If group was specified without a user on a router, and no group or user
3520 was specified on a transport, the group from the router was ignored.
3522 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3523 for visible compile-time settings that can be used to change these
3524 numbers, for those that want even more. Backwards compatibility with old
3525 spool files has been maintained. However, going back to a previous Exim
3526 release will lost any variables that are in spool files.
3528 PH/07 Two small changes when running in the test harness: increase delay when
3529 passing a TCP/IP connection to a new process, in case the original
3530 process has to generate a bounce, and remove special handling of
3531 127.0.0.2 (sic), which is no longer necessary.
3533 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3534 be the same on different OS.
3536 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3539 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3540 whether --show-vars was specified or not
3542 JJ/02 exipick: Added support for new ACL variable spool format introduced
3545 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3546 syntactically invalid From: or Reply-to: line, and a filter used this to
3547 generate an autoreply, and therefore failed to obtain an address for the
3548 autoreply, Exim could try to deliver to a non-existent relative file
3549 name, causing unrelated and misleading errors. What now happens is that
3550 it logs this as a hard delivery error, but does not attempt to create a
3553 PH/11 The exinext utility has a -C option for testing purposes, but although
3554 the given file was scanned by exinext itself; it wasn't being passed on
3555 when Exim was called.
3557 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3558 an end-of-file indication when reading a command response.
3560 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3561 compiled. In many other places in Exim, IPv6 addresses are always
3562 recognized, so I have changed this. It also means that IPv4 domain
3563 literals of the form [IPV4:n.n.n.n] are now always recognized.
3565 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3566 used if the router is not running as root, for example, when verifying at
3567 ACL time, or when using -bh. The debugging output from this situation was
3568 non-existent - all you got was a failure to exec. I have made two
3571 (a) Failures to set uid/gid, the current directory, or a process leader
3572 in a subprocess such as that created by queryprogram now generate
3573 suitable debugging output when -d is set.
3575 (b) The queryprogram router detects when it is not running as root,
3576 outputs suitable debugging information if -d is set, and then runs
3577 the subprocess without attempting to change uid/gid.
3579 PH/15 Minor change to Makefile for building test_host (undocumented testing
3582 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3583 additional section of a DNS packet that returns MX or SRV records.
3584 Instead, it always explicitly searches for A/AAAA records. This avoids
3585 major problems that occur when a DNS server includes only records of one
3586 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3587 fixed another bug: if SRV records were looked up and the corresponding
3588 address records were *not* found in the additional section, the port
3589 values from the SRV records were lost.
3591 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3592 using the correct key (the original address) when searching the retry
3593 rules in order to find which one to use for generating the retry hint.
3595 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3596 adding the default one. Similarly, if it contains a Reply-To: header, the
3597 errors_reply_to option, if set, is not used.
3599 PH/19 When calculating a retry time, Exim used to measure the "time since
3600 failure" by looking at the "first failed" field in the retry record. Now
3601 it does not use this if it is later than than the arrival time of the
3602 message. Instead it uses the arrival time. This makes for better
3603 behaviour in cases where some deliveries succeed, thus re-setting the
3604 "first failed" field. An example is a quota failure for a huge message
3605 when small messages continue to be delivered. Without this change, the
3606 "time since failure" will always be short, possible causing more frequent
3607 delivery attempts for the huge message than are intended.
3608 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3610 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3611 $1, $2, $3) because the numerical variables can be reset during some
3612 expansion items (e.g. "match"), thereby losing the authentication data.
3614 PH/21 Make -bV show the size of off_t variables so that the test suite can
3615 decide whether to run tests for quotas > 2G.
3617 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3618 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3619 filecount value is greater than 2G or if a quota value is greater than 2G
3620 on a system where the size of off_t is not greater than 4, a panic error
3623 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3624 never match. The debug and -bh output now contains an explicit error
3625 message indicating a malformed IPv4 address or mask.
3627 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3628 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3629 PH/23 above applies.
3631 PH/25 Do not write to syslog when running in the test harness. The only
3632 occasion when this arises is a failure to open the main or panic logs
3633 (for which there is an explicit test).
3635 PH/26 Added the /no_tell option to "control=freeze".
3637 PH/27 If a host name lookup failed very early in a connection, for example, if
3638 the IP address matched host_lookup and the reverse lookup yielded a name
3639 that did not have a forward lookup, an error message of the form "no IP
3640 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3641 could be logged. Now it outputs the IP address instead of "NULL".
3643 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3644 allows the sender and the authenticated sender to be set when
3645 submitting a message from within Exim. Since child_open_exim() is
3646 documented for local_scan(), the new function should be too.
3648 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3649 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3650 results in an empty string is now treated as unset.
3652 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3654 PH/31 Added sender_verify_fail logging option.
3656 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3657 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3658 tidied the source and removed it altogether.
3660 PH/33 When a queue run was abandoned because the load average was too high, a
3661 log line was always written; now it is written only if the queue_run log
3662 selector is set. In addition, the log line for abandonment now contains
3663 information about the queue run such as the pid. This is always present
3664 in "start" and "stop" lines but was omitted from the "abandon" line.
3666 PH/34 Omit spaces between a header name and the colon in the error message that
3667 is given when verify = headers_syntax fails (if there are lots of them,
3668 the message gets confusing).
3670 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3671 names, as there are now some PTR records that contain slashes. This check
3672 is only to protect against broken name servers that fall over on strange
3673 characters, so the fact that it applies to all lookups doesn't matter.
3675 PH/36 Now that the new test suite is complete, we can remove some of the
3676 special code in Exim that was needed for the old test suite. For example,
3677 sorting DNS records because real resolvers return them in an arbitrary
3678 order. The new test suite's fake resolver always returns records in the
3681 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3682 bounces) except when queue_only is set, to avoid logging races between
3683 the different processes.
3685 PH/38 Panic-die if .include specifies a non-absolute path.
3687 PH/39 A tweak to the "H" retry rule from its user.
3689 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3690 a label. They prevented compilation on older perls.
3692 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3693 a warning to be raised on newish perls.
3695 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3696 on queue. Changes to match documented behaviour of showing count of
3697 messages matching specified criteria.
3699 PH/40 Changed the default ident timeout from 30s to 5s.
3701 PH/41 Added support for the use of login_cap features, on those BSD systems
3702 that have them, for controlling the resources used by pipe deliveries.
3704 PH/42 The content-scanning code uses fopen() to create files in which to put
3705 message data. Previously it was not paying any attention to the mode of
3706 the files. Exim runs with umask(0) because the rest of the code creates
3707 files with open(), and sets the required mode explicitly. Thus, these
3708 files were ending up world-writeable. This was not a big issue, because,
3709 being within the spool directory, they were not world-accessible. I have
3710 created a function called modefopen, which takes an additional mode
3711 argument. It sets umask(777), creates the file, chmods it to the required
3712 mode, then resets the umask. All the relevant calls to fopen() in the
3713 content scanning code have been changed to use this function.
3715 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3716 to 24 hours. This avoids potential overflow problems when processing G
3717 and H retry rules. I suspect nobody ever tinkers with this value.
3719 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3721 PH/45 When the plaintext authenticator is running as a client, the server's
3722 challenges are checked to ensure they are valid base64 strings. By
3723 default, the authentication attempt is cancelled if an invalid string is
3724 received. Setting client_ignore_invalid_base64 true ignores these errors.
3725 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3726 they are received. Thus, the responses can be made to depend on the
3727 challenges. If an invalid string is ignored, an empty string is placed in
3730 PH/46 Messages that are created by the autoreply transport now contains a
3731 References: header, in accordance with RFCs 2822 and 3834.
3733 PH/47 Added authenticated_sender_force to the smtp transport.
3735 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3737 PH/49 Installed latest patch from the Sieve maintainer.
3739 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3740 was also set, the appendfile transport was unnecessarily scanning a
3741 directory of message files (e.g. for maildir delivery) to find the count
3742 of files (along with the size), even though it did not need this
3743 information. It now does the scan only if it needs to find either the
3744 size of the count of files.
3746 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3748 PH/52 Two bugs concerned with error handling when the smtp transport is
3751 (i) Exim was not creating retry information for temporary errors given
3752 for individual recipients after the DATA command when the smtp transport
3753 was used in LMTP mode. This meant that they could be retried too
3754 frequently, and not timed out correctly.
3756 (ii) Exim was setting the flag that allows error details to be returned
3757 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3758 recipients that were returned after the DATA command.
3760 PH/53 This is related to PH/52, but is more general: for any failing address,
3761 when detailed error information was permitted to be returned to the
3762 sender, but the error was temporary, then after the final timeout, only
3763 "retry timeout exceeded" was returned. Now it returns the full error as
3764 well as "retry timeout exceeded".
3766 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3767 do this, and (what is worse) MTAs that accept it.
3769 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3770 will now be deprecated.
3772 PH/56 New os.c-cygwin from the Cygwin maintainer.
3774 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3775 formats (previously only available in exim formats via -bpr, -bpru,
3776 and -bpra. Now also available in native and exiqgrep formats)
3778 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3779 with very large, slow to parse queues
3781 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3783 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3785 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3786 responses to authentication challenges, though it was showing the
3787 challenges; (ii) I've removed the CR characters from the debug output for
3790 PH/58 Allow for the insertion of a newline as well as a space when a string
3791 is turned into more than one encoded-word during RFC 2047 encoding. The
3792 Sieve code now uses this.
3794 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3795 data_4xx, lost_connection, tls_required.
3797 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3798 message was being sent as an SMTP response.
3800 PH/61 Add -l and -k options to exicyclog.
3802 PH/62 When verifying, if an address was redirected to one new address, so that
3803 verification continued, and the new address failed or deferred after
3804 having set something in $address_data, the value of $address_data was not
3805 passed back to the ACL. This was different to the case when no
3806 redirection occurred. The value is now passed back in both cases.
3808 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3809 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3810 use login_cap.h, so on its own it isn't the distinguishing feature. The
3811 new name refers directly to the setclassresources() function.
3813 PH/65 Added configuration files for NetBSD3.
3815 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3817 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3818 is preferred over IPv4.
3820 PH/68 The bounce_return_message and bounce_return_body options were not being
3821 honoured for bounces generated during the reception of non-SMTP messages.
3822 In particular, this applied to messages rejected by the ACL. This bug has
3823 been fixed. However, if bounce_return_message is true and bounce_return_
3824 body is false, the headers that are returned for a non-SMTP message
3825 include only those that have been read before the error was detected.
3826 (In the case of an ACL rejection, they have all been read.)
3828 PH/69 The HTML version of the specification is now built in a directory called
3829 spec_html instead of spec.html, because the latter looks like a path with
3830 a MIME-type, and this confuses some software.
3832 PH/70 Catch two compiler warnings in sieve.c.
3834 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3835 function verify_get_ident() calls ip_connect() to connect a socket, but
3836 if the "connect()" function timed out, ip_connect() used to close the
3837 socket. However, verify_get_ident() also closes the socket later, and in
3838 between Exim writes to the log, which may get opened at this point. When
3839 the socket was closed in ip_connect(), the log could get the same file
3840 descriptor number as the socket. This naturally causes chaos. The fix is
3841 not to close the socket in ip_connect(); the socket should be closed by
3842 the function that creates it. There was only one place in the code where
3843 this was missing, in the iplookup router, which I don't think anybody now
3844 uses, but I've fixed it anyway.
3846 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3847 well as to direct DNS lookups. Otherwise the handling of names in host
3848 lists is inconsistent and therefore confusing.
3854 PH/01 Two changes to the default runtime configuration:
3856 (1) Move the checks for relay_from_hosts and authenticated clients from
3857 after to before the (commented out) DNS black list checks.
3859 (2) Add control=submission to the relay_from_hosts and authenticated
3860 clients checks, on the grounds that messages accepted by these
3861 statements are most likely to be submissions.
3863 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3865 (1) Generate an error if the third argument for the ${prvs expansion is
3868 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3871 (3) Reset the variables that are obtained from the first argument of
3872 ${prvscheck and used in the second argument before leaving the code,
3873 because their memory is reclaimed, so using them afterwards may do
3876 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3877 one (it's much easier than Tom thought :-).
3879 (5) Because of (4), we can now allow for the use of $prvscheck_result
3880 inside the third argument.
3882 PH/03 For some reason, the default setting of PATH when running a command from
3883 a pipe transport was just "/usr/bin". I have changed it to
3886 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3887 anything to be listed in the output from -bV.
3889 PH/05 When a filter generated an autoreply, the entire To: header line was
3890 quoted in the delivery log line, like this:
3892 => >A.N.Other <ano@some.domain> <original@ddress> ...
3894 This has been changed so that it extracts the operative address. There
3895 may be more than one such address. If so, they are comma-separated, like
3898 => >ano@some.domain,ona@other.domain <original@ddress> ...
3900 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3901 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3902 not being looked up in the rDNS to get a host name, Exim was showing the
3903 IP address twice in Received: lines, even though the IP addresses were
3904 identical. For example:
3906 Received: from [1.2.3.4] (helo=[1.2.3.4])
3908 However, if the real host name was known, it was omitting the HELO data
3909 if it matched the actual IP address. This has been tidied up so that it
3910 doesn't show the same IP address twice.
3912 PH/07 When both +timestamp and +memory debugging was on, the value given by
3913 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3914 called by the debug printing, thereby overwriting the timestamp buffer.
3915 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3917 PH/08 When the original message was included in an autoreply transport, it
3918 always said "this is a copy of the message, including all the headers",
3919 even if body_only or headers_only was set. It now gives an appropriate
3922 PH/09 Applied a patch from the Sieve maintainer which:
3924 o fixes some comments
3925 o adds the (disabled) notify extension core
3926 o adds some debug output for the result of if/elsif tests
3927 o points to the current vacation draft in the documentation
3928 and documents the missing references header update
3932 o fixes a bug in processing the envelope test (when testing
3933 multiple envelope elements, the last element determined the
3936 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3937 Electronic Mail") by including:
3939 Auto-submitted: auto-generated
3941 in the messages that it generates (bounce messages and others, such as
3942 warnings). In the case of bounce messages for non-SMTP messages, there was
3943 also a typo: it was using "Auto_submitted" (underscore instead of
3944 hyphen). Since every message generated by Exim is necessarily in response
3945 to another message, thes have all been changed to:
3947 Auto-Submitted: auto-replied
3949 in accordance with these statements in the RFC:
3951 The auto-replied keyword:
3953 - SHOULD be used on messages sent in direct response to another
3954 message by an automatic process,
3956 - MUST NOT be used on manually-generated messages,
3958 - MAY be used on Delivery Status Notifications (DSNs) and Message
3959 Disposition Notifications (MDNs),
3961 - MUST NOT be used on messages generated by automatic or periodic
3962 processes, except for messages which are automatic responses to
3965 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3966 to the default Received: header definition.
3968 PH/12 Added log selector acl_warn_skipped (default on).
3970 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3971 variables because (a) they are in the wrong storage pool and (b) even if
3972 they were copied, it wouldn't work properly because of the caching.
3974 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3975 checking when decoding. Apparently there are clients that generate
3976 overlong encoded strings. Why am I not surprised?
3978 PH/15 If the first argument of "${if match_address" was not empty, but did not
3979 contain an "@" character, Exim crashed. Now it writes a panic log message
3980 and treats the condition as false.
3982 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3984 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3985 extension "envelope-auth". The code is finished and in agreement with
3986 other implementations, but there is no documentation so far and in fact,
3987 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3988 not changing the active code.
3990 Print executed "if" and "elsif" statements when debugging is used. This
3991 helps a great deal to understand what a filter does.
3993 Document more things not specified clearly in RFC3028. I had all this
3994 sorted out, when out of a sudden new issues came to my mind. Oops."
3996 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3999 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4000 canonical form (as documented). However, after a host name lookup from
4001 the IP address, check_host() was doing a simple string comparison with
4002 addresses acquired from the DNS when checking that the found name did
4003 have the original IP as one of its addresses. Since any found IPv6
4004 addresses are likely to be in abbreviated form, the comparison could
4005 fail. Luckily, there already exists a function for doing the comparison
4006 by converting both addresses to binary, so now that is used instead of
4007 the text comparison.
4009 PH/20 There was another similar case to PH/19, when a complete host name was
4010 given in a host list; looking up its IP address could give an abbreviated
4011 form, whereas the current host's name might or might not be abbreviated.
4012 The same fix has been applied.
4018 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4019 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4022 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4023 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4025 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4027 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4028 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4029 Also, for "Auto-Submitted", treat anything other than "no" as
4030 non-personal, in accordance with RFC 3834. (Previously it treated
4031 anything starting "auto-" as non-personal.)
4033 TF/01 The control=submission/name=... option had a problem with syntax
4034 errors if the name included a slash character. The /name= option
4035 now slurps the rest of the string, so it can include any characters
4036 but it must come last in the list of options (after /sender_retain
4039 PH/05 Some modifications to the interface to the fake nameserver for the new
4047 TK/01 Added the "success_on_redirect" address verification option. See
4048 NewStuff for rationale and an example.
4050 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4052 PH/02 Patch to exigrep to allow it to work on syslog lines.
4054 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4055 fread() to skip over the body file's header line, because in Cygwin the
4056 header line is locked and is inaccessible.
4058 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4059 co-exist for some time) to make it clear that it is the Exim ID that is
4060 referenced, not the Message-ID: header line.
4062 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4063 string_format() function, because snprintf() does not exist on all
4066 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4067 ${stat: expansion item.
4069 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4070 protocol synchronization error", to keep the pedants happy.
4072 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4073 well as for IRIX systems, when gcc is being used. See the host.c source
4076 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4078 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4081 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4082 transport and to the smtp transport in LMTP mode.
4084 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4086 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4087 run a filter in a subprocess. This could lead to confusion in subsequent
4088 lookups in the parent process. There should also be a search_tidyup() at
4089 the end of the subprocess.
4091 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4092 only if the host matched helo_try_verify_hosts, which caused the
4093 verification to occur when the EHLO/HELO command was issued. The ACL just
4094 tested the remembered result. Now, if a previous verification attempt has
4095 not happened, "verify = helo" does it there and then.
4097 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4099 TK/03 Fix log output including CR from clamd.
4101 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4102 exist provoked a memory error which could cause a segfault.
4104 PH/15 Installed PCRE 6.2
4106 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4108 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4109 of the problem. Specifically, suggested +O2 rather than +O1 for the
4112 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4114 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4115 record, the port was not correctly logged when the outgoing_port log
4116 selector was set (it logged the transort's default port).
4118 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4119 fallback_hosts, and "hosts" in the smtp transport.
4121 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4122 host errors such as "Connection refused".
4124 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4125 authentication with radiusclient 0.4.9:
4127 - Error returned from rc_read_config was caught wrongly
4128 - Username/password not passed on to radius server due to wrong length.
4130 The presumption is that some radiusclient API changes for 4.51/PH/17
4131 were not taken care of correctly. The code is still untested by me (my
4132 Linux distribution still has 0.3.2 of radiusclient), but it was
4133 contributed by a Radius user.
4135 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4136 expanding the "port" option of the smtp transport.
4138 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4139 while reading a MIME header. Thanks to Tom Hughes for a patch.
4141 PH/24 Include config.h inside local_scan.h so that configuration settings are
4144 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4145 that in an ACL for RCPT (for example), you can examine exactly what was
4148 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4149 commands, but it was not correctly comparing the address with the actual
4150 client host address. Thus, it would show the EHLO address in Received:
4151 header lines when this was not necessary.
4153 PH/27 Added the % operator to ${eval:}.
4155 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4156 it should be ignoring failures (because with -C, for example, it has lost
4157 privilege). It wasn't ignoring creation failures other than "already
4160 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4163 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4164 because an input line was too long, either on its own, or by virtue of
4165 too many continuations, the temporary file was not being removed, and the
4166 return code was incorrect.
4168 PH/31 Missing "BOOL" in function definition in filtertest.c.
4170 PH/32 Applied Sieve patches from the maintainer.
4172 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4174 PH/33 Added "verify = not_blind".
4176 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4177 Local/Makefile (with some defaults set). These are used in built scripts
4178 such as exicyclog, but they have never been used in the exim_install
4179 script (though there are many overriding facilities there). I have
4180 arranged that the exim_install script now takes note of these two
4183 PH/35 Installed configuration files for Dragonfly.
4185 PH/36 When a locally submitted message by a trusted user did not contain a
4186 From: header, and the sender address was obtained from -f or from an SMTP
4187 MAIL command, and the trusted user did not use -F to supply a sender
4188 name, $originator_name was incorrectly used when constructing a From:
4189 header. Furthermore, $originator_name was used for submission mode
4190 messages from external hosts without From: headers in a similar way,
4191 which is clearly wrong.
4193 PH/37 Added control=suppress_local_fixups.
4195 PH/38 When log_selector = +received_sender was set, and the addition of the
4196 sender made the log line's construction buffer exactly full, or one byte
4197 less than full, an overflow happened when the terminating "\n" was
4200 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4201 when the result of a list match is failure because a DNS lookup failed.
4203 PH/40 RM_COMMAND is now used in the building process.
4205 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4206 the "build-* directories that it finds.
4208 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4209 address in a domain literal was a prefix of an interface address.
4211 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4212 when verifying a sender address, unless rewrite_headers is false.
4214 PH/44 Wrote a long comment about why errors_to addresses are verified as
4215 recipients, not senders.
4217 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4218 the ratelimit ACL was added.
4220 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4222 PH/46 Added extra information about PostgreSQL errors to the error string.
4224 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4225 avoiding the need to install special zones in a real server. This is
4226 backwards compatible; if it can't find the fake resolver, it drops back.
4227 Thus, both old and new test suites can be run.
4229 TF/02 Added util/ratelimit.pl
4231 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4232 clock is set back in time.
4234 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4235 Candler <B.Candler@pobox.com>.
4237 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4238 OK for addresses that are the result of redirections.
4240 PH/48 A number of further additions for the benefit of the new test suite,
4241 including a fake gethostbyname() that interfaces to the fake DNS resolver
4244 TF/06 The fix for widen_domains has also been applied to qualify_single and
4245 search_parents which are the other dnslookup options that can cause
4248 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4251 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4253 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4254 service" if it encountered an MX record with an empty target hostname.
4255 The message is now "an MX or SRV record indicated no SMTP service".
4257 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4258 if the DNS of the sending site is misconfigured. This is quite a
4259 common situation. This change restores the behaviour of treating a
4260 helo verification defer as a failure.
4262 PH/51 If self=fail was set on a router, the bounce message did not include the
4263 actual error message.
4269 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4271 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4272 command itself ended in error, the underlying message about the transport
4273 filter timeout was being overwritten with the pipe command error. Now the
4274 underlying error message should be appended to the second error message.
4276 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4278 PH/02 Reduce the amount of output that "make" produces by default. Full output
4279 can still be requested.
4281 PH/03 The warning log line about a condition test deferring for a "warn" verb
4282 was being output only once per connection, rather than after each
4283 occurrence (because it was using the same function as for successful
4284 "warn" verbs). This seems wrong, so I have changed it.
4286 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4287 it should not have, which might have caused a crash in the right
4288 circumstances, but probably never did.
4290 PH/04 Installed a modified version of Tony Finch's patch to make submission
4291 mode fix the return path as well as the Sender: header line, and to
4292 add a /name= option so that you can make the user's friendly name appear
4295 TF/03 Added the control = fakedefer ACL modifier.
4297 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4298 Mark Lowes for thorough testing.
4300 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4302 TK/03 Merged latest SRS patch from Miles Wilton.
4304 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4305 with the definition in sysexits.h (which is #included earlier).
4306 Fortunately, Exim does not actually use EX_OK. The code used to try to
4307 preserve the sysexits.h value, by assuming that macro definitions were
4308 scanned for macro replacements. I have been disabused of this notion,
4309 so now the code just undefines EX_OK before #including unistd.h.
4311 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4312 in the smtp transport. When a block could not be written in a single
4313 write() function, the timeout was being re-applied to each part-write.
4314 This seems wrong - if the receiver was accepting one byte at a time it
4315 would take for ever. The timeout is now adjusted when this happens. It
4316 doesn't have to be particularly precise.
4318 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4319 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4321 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4322 without a domain if the check to <postmaster@domain> fails.
4324 SC/01 Eximstats: added -xls and the ability to specify output files
4325 (patch written by Frank Heydlauf).
4327 SC/02 Eximstats: use FileHandles for outputting results.
4329 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4331 SC/04 Eximstats: fixed display of large numbers with -nvr option
4333 SC/05 Eximstats: fixed merging of reports with empty tables.
4335 SC/06 Eximstats: added the -include_original_destination flag
4337 SC/07 Eximstats: removed tabs and trailing whitespace.
4339 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4341 TK/06 MBOX spool code: Add real "From " MBOX separator line
4342 so the .eml file is really in mbox format (even though
4343 most programs do not really care). Patch from Alex Miller.
4345 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4346 The latter is generated from $received_to and is only set if the
4347 message has one envelope recipient. SA can use these headers,
4348 obviously out-of-the-box. Patch from Alex Miller.
4350 PH/08 The ${def test on a variable was returning false if the variable's
4351 value was "0", contrary to what the specification has always said!
4352 The result should be true unless the variable is empty.
4354 PH/09 The syntax error of a character other than { following "${if
4355 def:variable_name" (after optional whitespace) was not being diagnosed.
4356 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4357 accidental colon was present, for example, could give incorrect results.
4359 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4360 result is used (not including appendfile, where other changes are about
4363 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4364 This involved changing a lot of size variables from int to off_t. It
4365 should work with maildirs and everything.
4367 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4368 spamd dying while we are connected to it.
4370 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4373 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4374 function for BDB 4.3.
4376 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4378 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4379 the sources for PCRE have been re-arranged and more files are now
4382 PH/15 The code I had for printing potentially long long variables in PH/11
4383 above was not the best (it lost precision). The length of off_t variables
4384 is now inspected at build time, and an appropriate printing format (%ld
4385 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4386 to be "long long int" or "long int". This is needed for the internal
4387 formatting function string_vformat().
4389 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4390 the configuration file to be ":syslog", then the script "guesses" where
4391 the logs files are, rather than using the compiled in default. In our
4392 case the guess is not the same as the compiled default, so the script
4393 suddenly stopped working when I started to use syslog. The patch checks
4394 to see if log_file_path is "". If so, it attempts to read it from exim
4395 with no configuration file to get the compiled in version, before it
4396 falls back to the previous guessing code."
4398 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4399 implementing BATV in an Exim configuration. See NewStuff for the gory
4402 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4403 Makefile that are specific to HP-UX.
4405 PH/18 If the "use_postmaster" option was set for a recipient callout together
4406 with the "random" option, the postmaster address was used as the MAIL
4407 FROM address for the random test, but not for the subsequent recipient
4408 test. It is now used for both.
4410 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4411 patch removes a few documentation additions to RFC 3028, because the
4412 latest draft now contains them. It adds the new en;ascii-case comparator
4413 and a new error check for 8bit text in MIME parts. Comparator and
4414 require names are now matched exactly. I enabled the subaddress
4415 extension, but it is not well tested yet (read: it works for me)."
4417 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4418 rework some of the code of TK/09 above to avoid the hardwired use of
4419 "%lld" and "long long". Replaced the call to snprintf() with a call to
4422 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4423 records point to non-existent hosts", "retry timeout exceeded", and
4424 "retry time not reached for any host after a long failure period".
4426 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4427 experimental DomainKeys support:
4429 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4430 (2) On an error such as an illegally used "control", the wrong name for
4431 the control was given.
4433 These problems did NOT occur unless DomainKeys support was compiled.
4435 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4437 PH/24 Added ${if match_ip condition.
4439 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4440 databases so that it will be absolutely obvious if a crash occurs in the
4441 DB library. This is a regular occurrence (often caused by mis-matched
4444 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4445 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4446 picked up on a user's system that detects such things. There doesn't seem
4447 to be a gcc warning option for this - only an attribute that has to be
4448 put on the function's prototype. It seems that in Fedora Core 4 they have
4449 set this on a number of new functions. No doubt there will be more in due
4452 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4453 specify a transport. However, if an address that was verified by such a
4454 router was the subject of a callout, Exim crashed because it tried to
4455 read the rcpt_include_affixes from the non-existent transport. Now it
4456 just assumes that the setting of that option is false. This bug was
4457 introduced by 4.51/PH/31.
4459 PH/28 Changed -d+all to exclude +memory, because that information is very
4460 rarely of interest, but it makes the output a lot bigger. People tend to
4461 do -d+all out of habit.
4463 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4464 code in os-type was giving problems when libc.so lives in lib64, like on
4467 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4468 aren't the modern standard, and it seems that some systems' include files
4469 don't always have them. Exim was already checking for some of the newer
4470 ones like T_AAAA, and defining it itself. I've added checks for all the
4471 record types that Exim uses.
4473 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4474 not automatically generating a new one, as it is supposed to. This
4475 prevented TLS from working. If the file did exist, but contained invalid
4476 data, a new version was generated, as expected. It was only the case of a
4477 non-existent file that was broken.
4479 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4480 with a change in libdomainkeys > 0.64.
4482 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4483 from DNS. If the selector record carries the flag, it now has
4484 precedence over the domain-wide flag.
4486 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4488 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4489 the use of a port name that isn't defined in /etc/services) occurred, the
4490 message was deferred as in a normal delivery, and thus remained on the
4491 spool, instead of being failed because of the mua_wrapper setting. This
4492 is now fixed, and I tidied up some of the mua_wrapper messages at the
4495 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4496 the messages in a hash of arrays rather than using individual hashes.
4497 This is a bit cleaner and results in dramatic memory savings, albeit
4498 at a slight CPU cost.
4500 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4501 as requested by Marc Sherman.
4503 SC/10 Eximstats: added histograms for user specified patterns as requested
4506 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4508 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4509 fopen() in the content-scanning modules that did not already have it.
4515 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4516 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4518 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4520 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4522 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4523 to test Sieve filters that use "vacation".
4525 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4526 that changes the way the GnuTLS parameters are stored in the cache file.
4527 The new format can be generated externally. For backward compatibility,
4528 if the data in the cache doesn't make sense, Exim assumes it has read an
4529 old-format file, and it generates new data and writes a new file. This
4530 means that you can't go back to an older release without removing the
4533 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4534 work if there are any delivery delays because "one_time" forces the
4535 parent to be marked "delivered", so its unseen clone is never tried
4536 again. For this reason, Exim now forbids the simultaneous setting of
4539 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4540 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4541 entry if you want to know the details. The fix, however, neglected to
4542 consider the case when local delivery batching is involved. The test for
4543 "previously delivered" was not happening when checking to see if an
4544 address could be batched with a previous (undelivered) one; under
4545 certain circumstances this could lead to multiple deliveries to the same
4548 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4549 in its include files, and this causes problems building Exim.
4551 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4552 header_syntax) but Exim was just ignoring anything given after a slash.
4553 In particular, this caused confusion with an attempt to use "verify =
4554 reverse_host_lookup/defer_ok". An error is now given when options are
4555 supplied for verify items that do not have them. (Maybe reverse_host_
4556 lookup should have a defer_ok option, but that's a different point.)
4558 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4559 defined by RFC 821) to 2048, because there were problems with some AUTH
4560 commands, and RFC 1869 says the size should be increased for extended
4561 SMTP commands that take arguments.
4563 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4566 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4567 "unknown" error; now it says that the functionality isn't in the binary.
4569 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4570 an address' error message when a string expansion fails (syntax or
4571 whatever). Otherwise the password may appear in the log. Following change
4572 PH/42 below, there is no longer a chance of it appearing in a bounce
4575 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4577 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4578 of its addresses was ever tried. (Bugzilla bug #2.)
4580 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4581 the result incorrectly in the debug output. (It correctly added a newline
4582 to what was transported.)
4584 TF/01 Added $received_time.
4586 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4587 commented out examples of how to interface to a virus scanner and to
4588 SpamAssassin. Also added commented examples of av_scanner and
4589 spamd_address settings.
4591 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4592 and controls are allowed in which ACLs. There were a couple of minor
4593 errors. Some of the entries in the conditions table (which is a table of
4594 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4595 negation of where the condition IS allowed.
4597 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4599 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4600 header file does not have a version number, so I've had to invent a new
4601 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4602 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4603 radiusclient), but it was contributed by a Radius user.
4605 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4606 files or directories, for OpenSSL.
4608 PH/19 When an Exim process that is running as root has to create an Exim log
4609 file, it does so in a subprocess that runs as exim:exim so as to get the
4610 ownership right at creation (otherwise, other Exim processes might see
4611 the file with the wrong ownership). There was no test for failure of this
4612 fork() call, which would lead to the process getting stuck as it waited
4613 for a non-existent subprocess. Forks do occasionally fail when resources
4614 run out. I reviewed all the other calls to fork(); they all seem to check
4617 PH/20 When checking for unexpected SMTP input at connect time (before writing
4618 the banner), Exim was not dealing correctly with a non-positive return
4619 from the read() function. If the client had disconnected by this time,
4620 the result was a log entry for a synchronization error with an empty
4621 string after "input=" when read() returned zero. If read() returned -1
4622 (an event I could not check), uninitialized data bytes were printed.
4623 There were reports of junk text (parts of files, etc) appearing after
4626 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4628 PH/22 Added support for macro redefinition, and (re)definition in between
4629 driver and ACL definitions.
4631 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4632 forgetting to use the resulting value; it was using the unexpanded value.
4634 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4635 hadn't been configured. The fix is from Juergen Kreileder, who
4636 understands it better than I do:
4638 "Here's what I see happening with three configured cyrus_sasl
4639 authenticators configured (plain, login, cram-md5):
4641 On startup auth_cyrus_sasl_init() gets called for each of these.
4642 This means three calls to sasl_listmech() without a specified mech_list.
4643 => SASL tests which mechs of all available mechs actually work
4644 => three warnings about OTP not working
4645 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4647 With the patch, sasl_listmech() also gets called three times. But now
4648 SASL's mech_list option is set to the server_mech specified in the the
4649 authenticator. Or in other words, the answer from sasl_listmech()
4650 gets limited to just the mech you're testing for (which is different
4652 => the return list contains just 'plain' or 'login', 'cram-md5' or
4653 nothing depending on the value of ob->server_mech.
4655 I've just tested the patch: Authentication still works fine,
4656 unavailable mechs specified in the exim configuration are still
4657 caught, and the auth.log warnings about OTP are gone."
4659 PH/25 When debugging is enabled, the contents of the command line are added
4660 to the debugging output, even when log_selector=+arguments is not
4663 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4664 answer is "GNU", and only if the return is "GNU/something" is the answer
4667 PH/27 $acl_verify_message is now set immediately after the failure of a
4668 verification in an ACL, and so is available in subsequent modifiers. In
4669 particular, the message can be preserved by coding like this:
4671 warn !verify = sender
4672 set acl_m0 = $acl_verify_message
4674 Previously, $acl_verify_message was set only while expanding "message"
4675 and "log_message" when a very denied access.
4677 PH/28 Modified OS/os.c-Linux with
4679 -#ifndef OS_LOAD_AVERAGE
4680 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4682 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4683 nomenclature these days.)
4685 PH/29 Installed patch from the Sieve maintainer that adds the options
4686 sieve_useraddress and sieve_subaddress to the redirect router.
4688 PH/30 In these circumstances:
4689 . Two addresses routed to the same list of hosts;
4690 . First host does not offer TLS;
4691 . First host accepts first address;
4692 . First host gives temporary error to second address;
4693 . Second host offers TLS and a TLS session is established;
4694 . Second host accepts second address.
4695 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4696 and peerdn, if requested) that were in fact used only for the second
4699 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4700 attention to any local part prefix or suffix that was matched by the
4701 router that accepted the address. It now behaves in the same way as it
4702 does for delivery: the affixes are removed from the local part unless
4703 rcpt_include_affixes is set on the transport.
4705 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4706 timeout during the DATA phase of an incoming message.
4708 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4709 applied a patch sanctioned by the Sieve maintainer.
4711 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4712 the uid or gid is negative. A case of a negative gid caused this to be
4713 noticed. The fix allows for either to be negative.
4715 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4716 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4719 PH/36 The change PH/12 above was broken. Fixed it.
4721 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4722 the grounds that routing the same address twice would always produce the
4723 same answer. This might have been true once, but it is certainly no
4724 longer true now. Routing a child address may depend on the previous
4725 routing that produced that child. Some complicated redirection strategies
4726 went wrong when messages had multiple recipients, and made Exim's
4727 behaviour dependent on the order in which the addresses were given.
4729 I have moved the duplicate checking until after the routing is complete.
4730 Exim scans the addresses that are assigned to local and remote
4731 transports, and removes any duplicates. This means that more work will be
4732 done, as duplicates will always all be routed, but duplicates are
4733 presumably rare, so I don't expect this is of any significance.
4735 For deliveries to pipes, files, and autoreplies, the duplicate checking
4736 still happens during the routing process, since they are not going to be
4739 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4740 It corrects a timeout issue with spamd. This is Ian's comment: "The
4741 background is that sometimes spamd either never reads data from a
4742 connection it has accepted, or it never writes response data. The exiscan
4743 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4744 blindly assumes that writes won't block so it may never time out."
4746 PH/39 Allow G after quota size as well as K and M.
4748 PH/40 The value set for $authenticated_id in an authenticator may not contain
4749 binary zeroes or newlines because the value is written to log lines and
4750 to spool files. There was no check on this. Now the value is run through
4751 the string_printing() function so that such characters are converted to
4752 printable escape sequences.
4754 PH/41 $message_linecount is a new variable that contains the total number of
4755 lines in the message. Compare $body_linecount, which is the count for the
4758 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4759 bounce and delay warning messages, except in certain special cases, which
4762 (a) An SMTP error message from a remote host;
4763 (b) A message specified in a :fail: redirection;
4764 (c) A message specified in a "fail" command in a system filter;
4765 (d) A message specified in a FAIL return from the queryprogram router;
4766 (e) A message specified by the cannot_route_message router option.
4768 In these cases only, Exim does include the error details in bounce and
4769 warning messages. There are also a few cases where bland messages such
4770 as "unrouteable address" or "local delivery error" are given.
4772 PH/43 $value is now also set for the "else" part of a ${run expansion.
4774 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4775 being worked on, but at least Exim now implements the latest version to
4778 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4779 process to complete was treated as a delivery failure, a timeout while
4780 writing the message to the pipe was logged, but erroneously treated as a
4781 successful delivery. Such timeouts include transport filter timeouts. For
4782 consistency with the overall process timeout, these timeouts are now
4783 treated as errors, giving rise to delivery failures by default. However,
4784 there is now a new Boolean option for the pipe transport called
4785 timeout_defer, which, if set TRUE, converts the failures into defers for
4786 both kinds of timeout. A transport filter timeout is now identified in
4789 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4790 systems where "make" and "gmake" are different, calling "gmake" at top
4791 level broke things. I've arranged for the value of $(MAKE) to be passed
4792 from the Makefile to this script so that it can call the same version of
4796 A note about Exim versions 4.44 and 4.50
4797 ----------------------------------------
4799 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4800 changes of various kinds. As a consequence, a big documentation update was
4801 needed. This delayed the release for rather longer than seemed good, especially
4802 in the light of a couple of (minor) security issues. Therefore, the changes
4803 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4804 release. So 4.44 and 4.50 are in effect two different branches that both start
4807 I have left the 4.50 change log unchanged; it contains all the changes since
4808 4.43. The change log for 4.44 is below; many of its items are identical to
4809 those for 4.50. This seems to be the most sensible way to preserve the
4810 historical information.
4816 1. Minor wording change to the doc/README.SIEVE file.
4818 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4819 computation of the current number of files was incorrect.
4821 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4822 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4825 4. Give more explanation in the error message when the command for a transport
4826 filter fails to execute.
4828 5. There are several places where Exim runs a non-Exim command in a
4829 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4830 was being done only for the command run by the queryprogram router. It is
4831 now done for all such subprocesses. The other cases are: ${run, transport
4832 filters, and the commands run by the lmtp and pipe transports.
4834 6. Added CONFIGURE_GROUP build-time option.
4836 7. Some older OS have a limit of 256 on the maximum number of file
4837 descriptors. Exim was using setrlimit() to set 1000 as a large value
4838 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4839 systems. I've change it so that if it can't get 1000, it tries for 256.
4841 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4842 was an oversight, and furthermore, ever since the addition of extra
4843 controls (e.g. 4.43/32), the checks on when to allow different forms of
4844 "control" were broken. There should now be diagnostics for all cases when a
4845 control that does not make sense is encountered.
4847 9. Added the /retain_sender option to "control=submission".
4849 10. $recipients is now available in the predata ACL (oversight).
4851 11. Tidy the search cache before the fork to do a delivery from a message
4852 received from the command line. Otherwise the child will trigger a lookup
4853 failure and thereby defer the delivery if it tries to use (for example) a
4854 cached ldap connection that the parent has called unbind on.
4856 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4857 of $address_data from the recipient verification was clobbered by the
4858 sender verification.
4860 13. The value of address_data from a sender verification is now available in
4861 $sender_address_data in subsequent conditions in the ACL statement.
4863 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4865 15. Added a new option "connect=<time>" to callout options, to set a different
4868 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4869 was its contents. (It was OK if the option was not defined at all.)
4871 17. A "Completed" log line is now written for messages that are removed from
4872 the spool by the -Mrm option.
4874 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4875 information about exactly what failed.
4877 19. Added -dd to debug only the daemon process.
4879 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4880 handles timeouts, both on the server side and network timeouts. Renamed the
4881 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4883 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4884 It is now set to "smtps".
4886 22. $host_address is now set to the target address during the checking of
4887 ignore_target_hosts.
4889 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4890 being passed; this would have caused $sender_host_name to have been used if
4891 matching the list had actually called for a host name (not very likely,
4892 since this list is usually IP addresses). A host name is now passed as
4895 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4896 code that specifies a non-restarting handler (typically sigaction() in
4897 modern systems) in an attempt to fix a rare and obscure crash bug.
4899 25. Narrowed the window for a race in the daemon that could cause it to ignore
4900 SIGCHLD signals. This is not a major problem, because they are used only to
4901 wake it up if nothing else does.
4903 26. A malformed maildirsize file could cause Exim to calculate negative values
4904 for the mailbox size or file count. Odd effects could occur as a result.
4905 The maildirsize information is now recalculated if the size or filecount
4908 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4909 support for a long time. Removed HAVE_SYS_VFS_H.
4911 28. Installed the latest version of exipick from John Jetmore.
4913 29. In an address list, if the pattern was not a regular expression, an empty
4914 subject address (from a bounce message) matched only if the pattern was an
4915 empty string. Non-empty patterns were not even tested. This was the wrong
4916 because it is perfectly reasonable to use an empty address as part of a
4917 database query. An empty address is now tested by patterns that are
4918 lookups. However, all the other forms of pattern expect the subject to
4919 contain a local part and a domain, and therefore, for them, an empty
4920 address still always fails if the pattern is not itself empty.
4922 30. Exim went into a mad DNS loop when attempting to do a callout where the
4923 host was specified on an smtp transport, and looking it up yielded more
4924 than one IP address.
4926 31. Re-factored the code for checking spool and log partition space into a
4927 function that finds that data and another that does the check. The former
4928 is then used to implement four new variables: $spool_space, $log_space,
4929 $spool_inodes, and $log_inodes.
4931 32. The RFC2047 encoding function was originally intended for short strings
4932 such as real names; it was not keeping to the 75-character limit for
4933 encoded words that the RFC imposes. It now respects the limit, and
4934 generates multiple encoded words if necessary. To be on the safe side, I
4935 have increased the buffer size for the ${rfc2047: expansion operator from
4938 33. It is now permitted to omit both strings after an "if" condition; if the
4939 condition is true, the result is "true". As before, when the second string
4940 is omitted, a false condition yields an empty string. This makes it less
4941 cumbersome to write custom ACL and router conditions.
4943 34. Failure to deliver a bounce message always caused it to be frozen, even if
4944 there was an errors_to setting on the router. The errors_to setting is now
4947 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4948 canonical form (fully expanded) before being placed in
4949 $sender_host_address.
4951 36. The table in the code that translates DNS record types into text (T_A to
4952 "A" for instance) was missing entries for NS and CNAME. It is just possible
4953 that this could have caused confusion if both these types were looked up
4954 for the same domain, because the text type is used as part of Exim's
4955 per-process caching. But the chance of anyone hitting this buglet seems
4958 37. The dnsdb lookup has been extended in a number of ways.
4960 (1) There is a new type, "zns", which walks up the domain tree until it
4961 finds some nameserver records. It should be used with care.
4963 (2) There is a new type, "mxh", which is like "mx" except that it returns
4964 just the host names, not the priorities.
4966 (3) It is now possible to give a list of domains (or IP addresses) to be
4967 looked up. The behaviour when one of the lookups defers can be
4968 controlled by a keyword.
4970 (4) It is now possible to specify the separator character for use when
4971 multiple records are returned.
4973 38. The dnslists ACL condition has been extended: it is now possible to supply
4974 a list of IP addresses and/or domains to be looked up in a particular DNS
4977 39. Added log_selector=+queue_time_overall.
4979 40. When running the queue in the test harness, wait just a tad after forking a
4980 delivery process, to get repeatability of debugging output.
4982 41. Include certificate and key file names in error message when GnuTLS fails
4983 to set them up, because the GnuTLS error message doesn't include the name
4984 of the failing file when there is a problem reading it.
4986 42. Allow both -bf and -bF in the same test run.
4988 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4990 44. The "Exiscan patch" is now merged into the mainline Exim source.
4992 45. Sometimes the final signoff response after QUIT could fail to get
4993 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4994 < 0 before doing a fflush(). This bug looks as though it goes back to the
4995 introduction of TLS in release 3.20, but "sometimes" must have been rare
4996 because the tests only now provoked it.
4998 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4999 (this can affect the format of dates).
5001 47. exim_tidydb, when checking for the continued existence of a message for
5002 which it has found a message-specific retry record, was not finding
5003 messages that were in split spool directories. Consequently, it was
5004 deleting retry records that should have stayed in existence.
5006 48. Steve fixed some bugs in eximstats.
5008 49. The SPA authentication driver was not abandoning authentication and moving
5009 on to the next authenticator when an expansion was forced to fail,
5010 contradicting the general specification for all authenticators. Instead it
5011 was generating a temporary error. It now behaves as specified.
5013 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5014 (the order specifies the preference for clients). The order is now AES256,
5015 AES128, 3DES, ARCFOUR128.
5017 51. Small patch to Sieve code - explicitly set From: when generating an
5020 52. Exim crashed if a remote delivery caused a very long error message to be
5021 recorded - for instance if somebody sent an entire SpamAssassin report back
5022 as a large number of 550 error lines. This bug was coincidentally fixed by
5023 increasing the size of one of Exim's internal buffers (big_buffer) that
5024 happened as part of the Exiscan merge. However, to be on the safe side, I
5025 have made the code more robust (and fixed the comments that describe what
5028 53. Now that there can be additional text after "Completed" in log lines (if
5029 the queue_time_overall log selector is set), a one-byte patch to exigrep
5030 was needed to allow it to recognize "Completed" as not the last thing in
5033 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5034 patch that reportedly fixes this has been added. I am not expert enough to
5035 create a test for it. This is what the patch creator wrote:
5037 "I found a little strange behaviour of ldap code when working with
5038 Windows 2003 AD Domain, where users was placed in more than one
5039 Organization Units. When I tried to give exim partial DN, the exit code
5040 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5041 But simultaneously result of request was absolutely normal ldap result,
5042 so I produce this patch..."
5044 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5045 REFERENCE, so I have modified the code to exclude the patch when that macro
5048 55. Some experimental protocols are using DNS PTR records for new purposes. The
5049 keys for these records are domain names, not reversed IP addresses. The
5050 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5051 leaves it alone. Component reversal etc. now happens only for IP addresses.
5054 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5056 57. Double the size of the debug message buffer (to 2048) so that more of very
5057 long debug lines gets shown.
5059 58. The exicyclog utility now does better if the number of log files to keep
5060 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5062 59. Two changes related to the smtp_active_hostname option:
5064 (1) $smtp_active_hostname is now available as a variable.
5065 (2) The default for smtp_banner uses $smtp_active_hostname instead
5066 of $primary_hostname.
5068 60. The host_aton() function is supposed to be passed a string that is known
5069 to be a valid IP address. However, in the case of IPv6 addresses, it was
5070 not checking this. This is a hostage to fortune. Exim now panics and dies
5071 if the condition is not met. A case was found where this could be provoked
5072 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5073 components; fortuitously, this particular loophole had already been fixed
5074 by change 4.50/55 above.
5076 If there are any other similar loopholes, the new check in host_aton()
5077 itself should stop them being exploited. The report I received stated that
5078 data on the command line could provoke the exploit when Exim was running as
5079 exim, but did not say which command line option was involved. All I could
5080 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5081 running as the user.
5084 61. There was a buffer overflow vulnerability in the SPA authentication code
5085 (which came originally from the Samba project). I have added a test to the
5086 spa_base64_to_bits() function which I hope fixes it.
5089 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5090 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5092 63. The daemon start-up calls getloadavg() while still root for those OS that
5093 need the first call to be done as root, but it missed one case: when
5094 deliver_queue_load_max is set with deliver_drop_privilege. This is
5095 necessary for the benefit of the queue runner, because there is no re-exec
5096 when deliver_drop_privilege is set.
5098 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5099 This has been fixed.
5101 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5102 was in use, was not putting the data itself into the right store pool;
5103 consequently, it could be overwritten for a subsequent message in the same
5104 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5107 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5109 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5110 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5111 the function were treating the return as a boolean value, which happened to
5112 work because 0=false and not-0=true, but is not correct code.
5114 68. The host_aton() function was not handling scoped IPv6 addresses (those
5115 with, for example, "%eth0" on the end) correctly.
5117 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5118 negated items (that is, ~something) in unsigned ints. Some compilers
5119 apparently mutter when there is no cast.
5121 70. If an address verification called from an ACL failed, and did not produce a
5122 user-specific message (i.e. there was only a "system" message), nothing was
5123 put in $acl_verify_message. In this situation, it now puts the system
5126 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5127 session; change 4.31/43 added the unwanted input to the log line - except
5128 that it did not do this in the start of session case. It now does.
5130 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5131 This is wrong and can cause the other end to generate a synchronization
5132 error if it is another Exim or anything else that does the synchronization
5133 check. A QUIT command is no longer sent after a timeout.
5135 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5136 during host lookups.
5138 74. The defer_ok option of callout verification was not working if it was used
5139 when verifying addresses in header lines, that is, for this case:
5141 verify = header_sender/callout=defer_ok
5143 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5144 those file descriptors could be used for SMTP connections. If anything
5145 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5146 could be sent to the SMTP client, causing chaos. The daemon now opens
5147 stdin, stdout, and stderr to /dev/null when it puts itself into the
5150 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5151 log by default. The user can override this with suitable Perl magic.
5153 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5154 the log message when discard triggers, was not working for the DATA ACL or
5155 for the non-SMTP ACL.
5157 78. Error message wording change in sieve.c.
5159 79. If smtp_accept_max_per_host was set, the number of connections could be
5160 restricted to fewer than expected, because the daemon was trying to set up
5161 a new connection before checking whether the processes handling previous
5162 connections had finished. The check for completed processes is now done
5163 earlier. On busy systems, this bug wouldn't be noticed because something
5164 else would have woken the daemon, and it would have reaped the completed
5167 80. If a message was submitted locally by a user whose login name contained one
5168 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5169 It caused a spool format error. I have fixed the spool reading code. A
5170 related problem was that the "from" clause in the Received: line became
5171 illegal because of the space(s). It is now covered by ${quote_local_part.
5173 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5176 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5178 83. Patch from Sieve maintainer to fix unterminated string problem in
5179 "vacation" handling.
5181 84. Some minor changes to the Linux configuration files to help with other
5182 OS variants using glibc.
5184 85. One more patch for Sieve to update vacation handling to latest spec.
5187 ----------------------------------------------------
5188 See the note above about the 4.44 and 4.50 releases.
5189 ----------------------------------------------------
5195 1. Change 4.43/35 introduced a bug that caused file counts to be
5196 incorrectly computed when quota_filecount was set in an appendfile
5199 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5200 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5203 3. Give more explanation in the error message when the command for a transport
5204 filter fails to execute.
5206 4. There are several places where Exim runs a non-Exim command in a
5207 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5208 was being done only for the command run by the queryprogram router. It is
5209 now done for all such subprocesses. The other cases are: ${run, transport
5210 filters, and the commands run by the lmtp and pipe transports.
5212 5. Some older OS have a limit of 256 on the maximum number of file
5213 descriptors. Exim was using setrlimit() to set 1000 as a large value
5214 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5215 systems. I've change it so that if it can't get 1000, it tries for 256.
5217 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5218 was an oversight, and furthermore, ever since the addition of extra
5219 controls (e.g. 4.43/32), the checks on when to allow different forms of
5220 "control" were broken. There should now be diagnostics for all cases when a
5221 control that does not make sense is encountered.
5223 7. $recipients is now available in the predata ACL (oversight).
5225 8. Tidy the search cache before the fork to do a delivery from a message
5226 received from the command line. Otherwise the child will trigger a lookup
5227 failure and thereby defer the delivery if it tries to use (for example) a
5228 cached ldap connection that the parent has called unbind on.
5230 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5231 of $address_data from the recipient verification was clobbered by the
5232 sender verification.
5234 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5235 was its contents. (It was OK if the option was not defined at all.)
5237 11. A "Completed" log line is now written for messages that are removed from
5238 the spool by the -Mrm option.
5240 12. $host_address is now set to the target address during the checking of
5241 ignore_target_hosts.
5243 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5244 being passed; this would have caused $sender_host_name to have been used if
5245 matching the list had actually called for a host name (not very likely,
5246 since this list is usually IP addresses). A host name is now passed as
5249 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5250 code that specifies a non-restarting handler (typically sigaction() in
5251 modern systems) in an attempt to fix a rare and obscure crash bug.
5253 15. Narrowed the window for a race in the daemon that could cause it to ignore
5254 SIGCHLD signals. This is not a major problem, because they are used only to
5255 wake it up if nothing else does.
5257 16. A malformed maildirsize file could cause Exim to calculate negative values
5258 for the mailbox size or file count. Odd effects could occur as a result.
5259 The maildirsize information is now recalculated if the size or filecount
5262 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5263 support for a long time. Removed HAVE_SYS_VFS_H.
5265 18. Updated exipick to current release from John Jetmore.
5267 19. Allow an empty sender to be matched against a lookup in an address list.
5268 Previously the only cases considered were a regular expression, or an
5271 20. Exim went into a mad DNS lookup loop when doing a callout where the
5272 host was specified on the transport, if the DNS lookup yielded more than
5275 21. The RFC2047 encoding function was originally intended for short strings
5276 such as real names; it was not keeping to the 75-character limit for
5277 encoded words that the RFC imposes. It now respects the limit, and
5278 generates multiple encoded words if necessary. To be on the safe side, I
5279 have increased the buffer size for the ${rfc2047: expansion operator from
5282 22. Failure to deliver a bounce message always caused it to be frozen, even if
5283 there was an errors_to setting on the router. The errors_to setting is now
5286 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5287 canonical form (fully expanded) before being placed in
5288 $sender_host_address.
5290 24. Updated eximstats to version 1.33
5292 25. Include certificate and key file names in error message when GnuTLS fails
5293 to set them up, because the GnuTLS error message doesn't include the name
5294 of the failing file when there is a problem reading it.
5296 26. Expand error message when OpenSSL has problems setting up cert/key files.
5299 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5300 (this can affect the format of dates).
5302 28. exim_tidydb, when checking for the continued existence of a message for
5303 which it has found a message-specific retry record, was not finding
5304 messages that were in split spool directories. Consequently, it was
5305 deleting retry records that should have stayed in existence.
5307 29. eximstats updated to version 1.35
5308 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5309 1.35 - bugfix such that pie charts by volume are generated correctly
5311 30. The SPA authentication driver was not abandoning authentication and moving
5312 on to the next authenticator when an expansion was forced to fail,
5313 contradicting the general specification for all authenticators. Instead it
5314 was generating a temporary error. It now behaves as specified.
5316 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5317 (the order specifies the preference for clients). The order is now AES256,
5318 AES128, 3DES, ARCFOUR128.
5320 31. Small patch to Sieve code - explicitly set From: when generating an
5323 32. Exim crashed if a remote delivery caused a very long error message to be
5324 recorded - for instance if somebody sent an entire SpamAssassin report back
5325 as a large number of 550 error lines. This bug was coincidentally fixed by
5326 increasing the size of one of Exim's internal buffers (big_buffer) that
5327 happened as part of the Exiscan merge. However, to be on the safe side, I
5328 have made the code more robust (and fixed the comments that describe what
5331 33. Some experimental protocols are using DNS PTR records for new purposes. The
5332 keys for these records are domain names, not reversed IP addresses. The
5333 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5334 leaves it alone. Component reversal etc. now happens only for IP addresses.
5337 34. The host_aton() function is supposed to be passed a string that is known
5338 to be a valid IP address. However, in the case of IPv6 addresses, it was
5339 not checking this. This is a hostage to fortune. Exim now panics and dies
5340 if the condition is not met. A case was found where this could be provoked
5341 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5342 components; fortuitously, this particular loophole had already been fixed
5343 by change 4.50/55 or 4.44/33 above.
5345 If there are any other similar loopholes, the new check in host_aton()
5346 itself should stop them being exploited. The report I received stated that
5347 data on the command line could provoke the exploit when Exim was running as
5348 exim, but did not say which command line option was involved. All I could
5349 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5350 running as the user.
5353 35. There was a buffer overflow vulnerability in the SPA authentication code
5354 (which came originally from the Samba project). I have added a test to the
5355 spa_base64_to_bits() function which I hope fixes it.
5358 36. The daemon start-up calls getloadavg() while still root for those OS that
5359 need the first call to be done as root, but it missed one case: when
5360 deliver_queue_load_max is set with deliver_drop_privilege. This is
5361 necessary for the benefit of the queue runner, because there is no re-exec
5362 when deliver_drop_privilege is set.
5364 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5365 was in use, was not putting the data itself into the right store pool;
5366 consequently, it could be overwritten for a subsequent message in the same
5367 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5370 38. Sometimes the final signoff response after QUIT could fail to get
5371 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5372 < 0 before doing a fflush(). This bug looks as though it goes back to the
5373 introduction of TLS in release 3.20, but "sometimes" must have been rare
5374 because the tests only now provoked it.
5380 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5381 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5382 Now it returns an integer. A number of calls were still expecting a T/F
5383 return. Fortuitously, in all cases, the tests worked in OK situations,
5384 which is the norm. However, things would have gone wrong on any write
5385 failures on the smtp file descriptor. This function is used when sending
5386 messages over SMTP and also when doing verify callouts.
5388 2. When Exim is called to do synchronous delivery of a locally submitted
5389 message (the -odf or -odi options), it no longer closes stderr before doing
5392 3. Implemented the mua_wrapper option.
5394 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5396 5. Implemented the functions header_remove(), header_testname(),
5397 header_add_at_position(), and receive_remove_recipient(), and exported them
5400 6. If an ACL "warn" statement specified the addition of headers, Exim already
5401 inserted X-ACL-Warn: at the start if there was no header name. However, it
5402 was not making this test for the second and subsequent header lines if
5403 there were newlines in the string. This meant that an invalid header could
5404 be inserted if Exim was badly configured.
5406 7. Allow an ACL "warn" statement to add header lines at the start or after all
5407 the Received: headers, as well as at the end.
5409 8. Added the rcpt_4xx retry error code.
5411 9. Added postmaster_mailfrom=xxx to callout verification option.
5413 10. Added mailfrom=xxxx to the callout verification option, for verify=
5416 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5417 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5419 12. Inserted some casts to stop certain compilers warning when using pointer
5420 differences as field lengths or precisions in printf-type calls (mostly
5421 affecting debugging statements).
5423 13. Added optional readline() support for -be (dynamically loaded).
5425 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5426 same clock tick as a message's arrival, so that its received time was the
5427 same as the "first fail" time on the retry record, and that message
5428 remained on the queue past the ultimate address timeout, every queue runner
5429 would try a delivery (because it was past the ultimate address timeout) but
5430 after another failure, the ultimate address timeout, which should have then
5431 bounced the address, did not kick in. This was a "< instead of <=" error;
5432 in most cases the first failure would have been in the next clock tick
5433 after the received time, and all would be well.
5435 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5436 being recognized when the domain list was tested by the match_domain
5437 condition in an expansion string.
5439 16. Added the ${str2b64: operator.
5441 17. Exim was always calling setrlimit() to set a large limit for the number of
5442 processes, without checking whether the existing limit was already
5443 adequate. (It did check for the limit on file descriptors.) Furthermore,
5444 errors from getrlimit() and setrlimit() were being ignored. Now they are
5445 logged to the main and panic logs, but Exim does carry on, to try to do its
5446 job under whatever limits there are.
5448 18. Imported PCRE 5.0.
5450 19. Trivial typo in log message " temporarily refused connection" (the leading
5453 20. If the log selector return_path_on_delivery was set and an address was
5454 redirected to /dev/null, the delivery process crashed because it assumed
5455 that a return path would always be set for a "successful" delivery. In this
5456 case, the whole delivery is bypassed as an optimization, and therefore no
5459 21. Internal re-arrangement: the function for sending a challenge and reading
5460 a response while authentication was assuming a zero-terminated challenge
5461 string. It's now changed to take a pointer and a length, to allow for
5462 binary data in such strings.
5464 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5466 23. Exim was not respecting finduser_retries when seeking the login of the
5467 uid under which it was called; it was always trying 10 times. (The default
5468 setting of finduser_retries is zero.) Also, it was sleeping after the final
5469 failure, which is pointless.
5471 24. Implemented tls_on_connect_ports.
5473 25. Implemented acl_smtp_predata.
5475 26. If the domain in control=submission is set empty, Exim assumes that the
5476 authenticated id is a complete email address when it generates From: or
5477 Sender: header lines.
5479 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5480 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5481 chown and chgrp in /bin and hostname in /usr/bin.
5483 28. Exim was keeping the "process log" file open after each use, just as it
5484 does for the main log. This opens the possibility of it remaining open for
5485 long periods when the USR1 signal hits a daemon. Occasional processlog
5486 errors were reported, that could have been caused by this. Anyway, it seems
5487 much more sensible not to leave this file open at all, so that is what now
5490 29. The long-running daemon process does not normally write to the log once it
5491 has entered its main loop, and it closes the log before doing so. This is
5492 so that log files can straightforwardly be renamed and moved. However,
5493 there are a couple of unusual error situations where the daemon does write
5494 log entries, and I had neglected to close the log afterwards.
5496 30. The text of an SMTP error response that was received during a remote
5497 delivery was being truncated at 512 bytes. This is too short for some of
5498 the long messages that one sometimes sees. I've increased the limit to
5501 31. It is now possible to make retry rules that apply only when a message has a
5502 specific sender, in particular, an empty sender.
5504 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5505 it possible to be selective about when SMTP synchronization is enforced.
5507 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5509 32. Implemented hosts_connection_nolog.
5511 33. Added an ACL for QUIT.
5513 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5516 35. Added mailbox_size and mailbox_filecount to appendfile.
5518 36. Added control = no_multiline_responses to ACLs.
5520 37. There was a bug in the logic of the code that waits for the clock to tick
5521 in the case where the clock went backwards by a substantial amount such
5522 that the microsecond fraction of "now" was more than the microsecond
5523 fraction of "then" (but the whole seconds number was less).
5525 38. Added support for the libradius Radius client library this is found on
5526 FreeBSD (previously only the radiusclient library was supported).
5532 1. When certain lookups returned multiple values in the form name=value, the
5533 quoting of the values was not always being done properly. Specifically:
5534 (a) If the value started with a double quote, but contained no whitespace,
5536 (b) If the value contained whitespace other than a space character (i.e.
5537 tabs or newlines or carriage returns) it was not quoted.
5538 This fix has been applied to the mysql and pgsql lookups by writing a
5539 separate quoting function and calling it from the lookup code. The fix
5540 should probably also be applied to nisplus, ibase and oracle lookups, but
5541 since I cannot test any of those, I have not disturbed their existing code.
5543 2. A hit in the callout cache for a specific address caused a log line with no
5544 reason for rejecting RCPT. Now it says "Previous (cached) callout
5545 verification failure".
5547 3. There was an off-by-one bug in the queryprogram router. An over-long
5548 return line was truncated at 256 instead of 255 characters, thereby
5549 overflowing its buffer with the terminating zero. As well as fixing this, I
5550 have increased the buffer size to 1024 (and made a note to document this).
5552 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5553 when Exim is waiting for an SMTP response from a remote server, Exim
5554 restarts its select() call on the socket, thereby resetting its timeout.
5555 This is not a problem when such interrupts are rare. Somebody set up a cron
5556 job to run exiwhat every 2 minutes, which is less than the normal select()
5557 timeout (5 or 10 minutes). This meant that the select() timeout never
5558 kicked in because it was always reset. I have fixed this by comparing the
5559 time when an interrupt arrives with the time at the start of the first call
5560 to select(). If more time than the timeout has elapsed, the interrupt is
5561 treated as a timeout.
5563 5. Some internal re-factoring in preparation for the addition of Sieve
5564 extensions (by MH). In particular, the "personal" test is moved to a
5565 separate function, and given an option for scanning Cc: and Bcc: (which is
5566 not set for Exim filters).
5568 6. When Exim created an email address using the login of the caller as the
5569 local part (e.g. when creating a From: or Sender: header line), it was not
5570 quoting the local part when it contained special characters such as @.
5572 7. Installed new OpenBSD configuration files.
5574 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5575 try to make them clearer.
5577 9. Callout options, other than the timeout value, were being ignored when
5578 verifying sender addresses in header lines. For example, when using
5580 verify = header_sender/callout=no_cache
5582 the cache was (incorrectly) being used.
5584 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5585 only the Cygwin environment.
5587 11. When return_path_on_delivery was set as a log selector, if different remote
5588 addresses in the same message used different return paths and parallel
5589 remote delivery occurred, the wrong values would sometimes be logged.
5590 (Whenever a remote delivery process finished, the return path value from
5591 the most recently started remote delivery process was logged.)
5593 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5594 lines when AUTH and/or TLS are in use. This is the "received protocol"
5595 field. Exim used to use "asmtp" for authenticated SMTP, without any
5596 indication (in the protocol name) for TLS use. Now it follows the RFC and
5597 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5598 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5599 names appear in log lines as well as in Received: header lines.
5601 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5602 extensions, and comparison tests, and to fix some bugs.
5604 14. Changes to the "personal" filter test:
5606 (1) The test was buggy in that it was just doing the equivalent of
5607 "contains" tests on header lines. For example, if a user's address was
5608 anne@some.where, the "personal" test would incorrectly be true for
5610 To: susanne@some.where
5612 This test is now done by extracting each address from the header in turn,
5613 and checking the entire address. Other tests that are part of "personal"
5614 are now done using regular expressions (for example, to check local parts
5615 of addresses in From: header lines).
5617 (2) The list of non-personal local parts in From: addresses has been
5618 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5619 taken from the Sieve specification recommendations.
5621 (3) If the message contains any header line starting with "List-" it is
5622 treated as non-personal.
5624 (4) The test for "circular" in the Subject: header line has been removed
5625 because it now seems ill-conceived.
5627 15. Minor typos in src/EDITME comments corrected.
5629 16. Installed latest exipick from John Jetmore.
5631 17. If headers_add on a router specified a text string that was too long for
5632 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5633 of string_sprintf() is now avoided.
5635 18. $message_body_size was not set (it was always zero) when running the DATA
5636 ACL and the local_scan() function.
5638 19. For the "mail" command in an Exim filter, no default was being set for
5639 the once_repeat time, causing a random time value to be used if "once" was
5640 specified. (If the value happened to be <= 0, no repeat happened.) The
5641 default is now 0s, meaning "never repeat". The "vacation" command was OK
5642 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5643 (I found it when inspecting the code).
5645 20. There is now an overall timeout for performing a callout verification. It
5646 defaults to 4 times the callout timeout, which applies to individual SMTP
5647 commands during the callout. The overall timeout applies when there is more
5648 than one host that can be tried. The timeout is checked before trying the
5649 next host. This prevents very long delays if there are a large number of
5650 hosts and all are timing out (e.g. when the network connections are timing
5651 out). The value of the overall timeout can be changed by specifying an
5652 additional sub-option for "callout", called "maxwait". For example:
5654 verify = sender/callout=5s,maxwait=20s
5656 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5657 to the end before writing, but this should make it even safer).
5659 22. Exim was forgetting that it had advertised PIPELINING for the second and
5660 subsequent messages on an SMTP connection. It was also not resetting its
5661 memory on STARTTLS and an internal HELO.
5663 23. When Exim logs an SMTP synchronization error within a session, it now
5664 records whether PIPELINING has been advertised or not.
5666 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5667 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5668 rather than long int.
5670 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5672 26. Added the never_mail option to autoreply.
5678 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5679 crash if the getsockname() call failed; this can happen if a connection is
5680 closed very soon after it is established. The problem was simply in the
5681 order in which certain operations were done, causing Exim to try to write
5682 to the SMTP stream before it had set up the file descriptor. The bug has
5683 been fixed by making things happen in the correct order.
5689 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5690 before the connection was closed, thus losing the rejection response.
5692 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5693 some early Solaris releases, but causes trouble in current releases where
5694 socklen_t is defined.
5696 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5699 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5702 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5703 that releasing the top of it at the end releases what was used for sub-
5704 expansions (unless the block got too big). However, discard this block if
5705 the first thing is a variable or header, so that we can use its block when
5706 it is dynamic (useful for very large $message_headers, for example).
5708 6. Lookups now cache *every* query, not just the most recent. A new, separate
5709 store pool is used for this. It can be recovered when all lookup caches are
5710 flushed. Lookups now release memory at the end of their result strings.
5711 This has involved some general refactoring of the lookup sources.
5713 7. Some code has been added to the store_xxx() functions to reduce the amount
5714 of flapping under certain conditions.
5716 8. log_incoming_interface used to affect only the <= reception log lines. Now
5717 it causes the local interface and port to be added to several more SMTP log
5718 lines, for example "SMTP connection from", and rejection lines.
5720 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5722 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5724 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5725 could be overwritten at the end of the current message (or the start of a
5726 new message if it was set in a HELO ACL). The value is now preserved for
5727 the duration of the SMTP connection.
5729 12. If a transport had a headers_rewrite setting, and a matching header line
5730 contained an unqualified address, that address was qualified, even if it
5731 did not match any rewriting rules. The underlying bug was that the values
5732 of the flags that permit the existence of unqualified sender and recipient
5733 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5734 non-local messages, and by -bnq for local messages) were not being
5735 preserved with the message after it was received.
5737 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5738 "next input=" as part of the text comprising the host identity instead of
5739 the correct text. The code was using the same buffer for two different
5740 strings. However, depending on which order the printing function evaluated
5741 its arguments, the bug did not always show up. Under Linux, for example, my
5742 test suite worked just fine.
5744 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5745 doesn't work with some older versions of Perl. It has been changed to "my",
5746 which in any case is probably the better facility to use.
5748 15. A really picky compiler found some instances of statements for creating
5749 error messages that either had too many or two few arguments for the format
5752 16. The size of the buffer for calls to the DNS resolver has been increased
5753 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5754 for addresses that have a lot of PTR records. This alleviates a problem; it
5755 does not fully solve it.
5757 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5758 buffer now truncates the list and logs the incident, which is the same
5759 action as happens when Exim is looking up a host name and its aliases.
5760 Previously in this situation something unpredictable would happen;
5761 sometimes it was "internal error: store_reset failed".
5763 18. If a server dropped the connection unexpectedly when an Exim client was
5764 using GnuTLS and trying to read a response, the client delivery process
5765 crashed while trying to generate an error log message.
5767 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5768 string, for example:
5770 warn message = H1: something\nH2: something
5772 the text was added as a single header line from Exim's point of view
5773 though it ended up OK in the delivered message. However, searching for the
5774 second and subsequent header lines using $h_h2: did not work. This has been
5775 fixed. Similarly, if a system filter added multiple headers in this way,
5776 the routers could not see them.
5778 20. Expanded the error message when iplsearch is called with an invalid key to
5779 suggest using net-iplsearch in a host list.
5781 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5782 ACLs are no longer actually imposed (and a message to that effect is
5785 22. If a "gecos" field in a passwd entry contained escaped characters, in
5786 particular, if it contained a \" sequence, Exim got it wrong when building
5787 a From: or a Sender: header from that name. A second bug also caused
5788 incorrect handling when an unquoted " was present following a character
5789 that needed quoting.
5791 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5792 was not being matched caselessly.
5794 24. Arranged for all hyphens in the exim.8 source to be escaped with
5797 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5798 properly. Recipient callout cache records were still being keyed to include
5799 the sender, even when use_sender was set false. This led to far more
5800 callouts that were necessary. The sender is no longer included in the key
5801 when use_sender is false.
5803 26. Added "control = submission" modifier to ACLs.
5805 27. Added the ${base62d: operator to decode base 62 numbers.
5807 28. dnsdb lookups can now access SRV records.
5809 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5810 the configuration file.
5812 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5813 (-v) mode. This makes the output for a verbose queue run more intelligible.
5815 31. Added a use_postmaster feature to recipient callouts.
5817 32. Added the $body_zerocount variable, containing the number of binary zero
5818 bytes in the message body.
5820 33. The time of last modification of the "new" subdirectory is now used as the
5821 "mailbox time last read" when there is a quota error for a maildir
5824 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5826 35. Added +ignore_unknown as a special item in host lists.
5828 36. Code for decoding IPv6 addresses in host lists is now included, even if
5829 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5830 address was recognized as an IP address, but was then not correctly decoded
5831 into binary, causing unexpected and incorrect effects when compared with
5838 1. Very minor rewording of debugging text in manualroute to say "list of
5839 hosts" instead of "hostlist".
5841 2. If verify=header_syntax was set, and a header line with an unqualified
5842 address (no domain) and a large number of spaces between the end of the
5843 name and the colon was received, the reception process suffered a buffer
5844 overflow, and (when I tested it) crashed. This was caused by some obsolete
5845 code that should have been removed. The fix is to remove it!
5847 3. When running in the test harness, delay a bit after writing a bounce
5848 message to get a bit more predictability in the log output.
5850 4. Added a call to search_tidyup() just before forking a reception process. In
5851 theory, someone could use a lookup in the expansion of smtp_accept_max_
5852 per_host which, without the tidyup, could leave open a database connection.
5854 5. Added the variables $recipient_data and $sender_data which get set from a
5855 lookup success in an ACL "recipients" or "senders" condition, or a router
5856 "senders" option, similar to $domain_data and $local_part_data.
5858 6. Moved the writing of debug_print from before to after the "senders" test
5861 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5862 problems for message scanning, either using a data ACL, or using
5863 local_scan() because the Received: header was not generated till after they
5864 were called (in order to set the time as the time of reception completion).
5865 I have revised the way this works. The header is now generated after the
5866 body is received, but before the ACL or local_scan() are called. After they
5867 are run, the timestamp in the header is updated.
5873 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5874 before starting a queue runner without re-exec. This happened only when
5875 deliver_drop_privilege was set or when the Exim user was set to root. The
5876 effect of the bug was that timeouts during subsequent deliveries caused
5877 crashes instead of being properly handled. The handler is now left at its
5878 default (and expected) setting.
5880 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5881 message, again when deliver_drop_privilege is set or Exim is run as root.
5882 The bug described in (1) was not present in this case, but the tidying up
5883 of the other signals was missing. I have made the two cases consistent.
5885 3. The ignore_target_hosts setting on a manualroute router was being ignored
5886 for hosts that were looked up using the /MX notation.
5888 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5891 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5892 operated on the sender address. After changing the $sender_address to <>
5893 for the sender address verify, Exim was re-instated it as the original
5894 (before rewriting) address, but remembering that it had rewritten it, so it
5895 wasn't rewriting it again. This bug also had the effect of breaking the
5896 sender address verification caching when the sender address was rewritten.
5898 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5899 This has been changed so that if the ip literal address matches
5900 ignore_target_hosts, the router declines.
5902 7. Added expansion conditions match_domain, match_address, and match_local_
5903 part (NOT match_host).
5905 8. The placeholder for the Received: header didn't have a length field set.
5907 9. Added code to Exim itself and to exim_lock to test for a specific race
5908 condition that could lead to file corruption when using MBX delivery. The
5909 issue is with the lockfile that is created in /tmp. If this file is removed
5910 after a process has opened it but before that process has acquired a lock,
5911 there is the potential for a second process to recreate the file and also
5912 acquire a lock. This could lead to two Exim processes writing to the file
5913 at the same time. The added code performs the same test as UW imapd; it
5914 checks after acquiring the lock that its file descriptor still refers to
5915 the same named file.
5917 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5918 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5921 11. Added the smtp_active_hostname option. If used, this will typically be made
5922 to depend on the incoming interface address. Because $interface_address is
5923 not set up until the daemon has forked a reception process, error responses
5924 that can happen earlier (such as "too many connections") no longer contain
5927 12. If an expansion in a condition on a "warn" statement fails because a lookup
5928 defers, the "warn" statement is abandoned, and the next ACL statement is
5929 processed. Previously this caused the whole ACL to be aborted.
5931 13. Added the iplsearch lookup type.
5933 14. Added ident_timeout as a log selector.
5935 15. Added tls_certificate_verified as a log selector.
5937 16. Added a global option tls_require_ciphers (compare the smtp transport
5938 option of the same name). This controls incoming TLS connections.
5940 17. I finally figured out how to make tls_require_ciphers do a similar thing
5941 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5942 before starting the TLS session.
5944 18. Tabs are now shown as \t in -bP output.
5946 19. If the log selector return_path_on_delivery was set, Exim crashed when
5947 bouncing a message because it had too many Received: header lines.
5949 20. If two routers both had headers_remove settings, and the first one included
5950 a superfluous trailing colon, the final name in the first list and the
5951 first name in the second list were incorrectly joined into one item (with a
5952 colon in the middle).
5958 1. Added -C and -D options to the exinext utility, mainly to make it easier
5959 to include in the automated testing, but these could be helpful when
5960 multiple configurations are in use.
5962 2. The exinext utility was not formatting the output nicely when there was
5963 an alternate port involved in the retry record key, nor when there was a
5964 message id as well (for retries that were specific to a specific message
5965 and a specific host). It was also confused by IPv6 addresses, because of
5966 the additional colons they contain. I have fixed the IPv4 problem, and
5967 patched it up to do a reasonable job for IPv6.
5969 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5970 delivery, the log line now contains "pipelined" if PIPELINING was used.
5972 4. An SMTP transport process used to panic and die if the bind() call to set
5973 an explicit outgoing interface failed. This has been changed; it is now
5974 treated in the same way as a connect() failure.
5976 5. A reference to $sender_host_name in the part of a conditional expansion
5977 that was being skipped was still causing a DNS lookup. This no longer
5980 6. The def: expansion condition was not recognizing references to header lines
5981 that used bh_ and bheader_.
5983 7. Added the _cache feature to named lists.
5985 8. The code for checking quota_filecount in the appendfile transport was
5986 allowing one more file than it should have been.
5988 9. For compatibility with Sendmail, the command line option
5996 and sets the incoming protocol and host name (for trusted callers). The
5997 host name and its colon can be omitted when only the protocol is to be set.
5998 Note the Exim already has two private options, -pd and -ps, that refer to
5999 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6000 "s", but I don't think that's a major issue.
6002 10. A number of refactoring changes to the code, none of which should affect
6005 (a) The number of logging options was getting close to filling up the
6006 32-bit word that was used as a bit map. I have split them into two classes:
6007 those that are passed in the argument to log_write(), and those that are
6008 only ever tested independently outside of that function. These are now in
6009 separate 32-bit words, so there is plenty of room for expansion again.
6010 There is no change in the user interface or the logging behaviour.
6012 (b) When building, for example, log lines, the code previously used a
6013 macro that called string_cat() twice, in order to add two strings. This is
6014 not really sufficiently general. Furthermore, there was one instance where
6015 it was actually wrong because one of the argument was used twice, and in
6016 one call a function was used. (As it happened, calling the function twice
6017 did not affect the overall behaviour.) The macro has been replaced by a
6018 function that can join an arbitrary number of extra strings onto a growing
6021 (c) The code for expansion conditions now uses a table and a binary chop
6022 instead of a serial search (which was left over from when there were very
6023 few conditions). Also, it now recognizes conditions like "pam" even when
6024 the relevant support is not compiled in: a suitably worded error message is
6025 given if an attempt is made to use such a condition.
6027 11. Added ${time_interval:xxxxx}.
6029 12. A bug was causing one of the ddress fields not to be passed back correctly
6030 from remote delivery subprocesses. The field in question was not being
6031 subsequently used, so this caused to problems in practice.
6033 13. Added new log selectors queue_time and deliver_time.
6035 14. Might have fixed a bug in maildirsizefile handling that threw up
6036 "unexpected character" debug warnings, and recalculated the data
6037 unnecessarily. In any case, I expanded the warning message to give more
6040 15. Added the message "Restricted characters in address" to the statements in
6041 the default ACL that block characters like @ and % in local parts.
6043 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6044 Three changes have been made:
6046 (a) There was a serious bug; a negative response to MAIL caused the whole
6047 recipient domain to be cached as invalid, thereby blocking all messages
6048 to all local parts at the same domain, from all senders. This bug has
6049 been fixed. The domain is no longer cached after a negative response to
6050 MAIL if the sender used is not empty.
6052 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6055 (c) A new callout option, "use_sender" has been added for people who want
6056 the modified behaviour.
6062 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6065 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6066 indeed breaks things for older releases.
6068 3. Added additional logging to the case where there is a problem reading data
6069 from a filter that is running in a subprocess using a pipe, in order to
6070 try to track down a specific problem.
6072 4. Testing facility fudge: when running in the test harness and attempting
6073 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6074 getting "No route to host". Convert this to a timeout.
6076 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6079 6. Some OS don't have socklen_t but use size_t instead. This affects the
6080 fifth argument of getsockopt() amongst other things. This is now
6081 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6082 can be set for individual OS. I have set it for SunOS5, OSF1, and
6083 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6084 some earlier ones do not.
6086 7. Change 4.30/15 was not doing the test caselessly.
6088 8. The standard form for an IPv6 address literal was being rejected by address
6089 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6090 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6091 this, as well as the form without the "IPv6" on the front (but only when
6092 address literals are enabled, of course).
6094 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6096 10. Exim crashed if a message with an empty sender address specified by -f
6097 encountered a router with an errors_to setting. This could be provoked only
6098 by a command such as
6102 where an empty string was supplied; "<>" did not hit this bug.
6104 11. Installed PCRE release 4.5.
6106 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6107 remained set. It is now erased.
6109 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6110 times from message ids (which are base 36 rather than the normal 62).
6112 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6113 were being counted as actual protocol errors, and logged if the log
6114 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6115 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6116 and DATA following a set of rejected RCPTs do not count as protocol errors.
6117 In other words, Exim assumes they were pipelined, though this may not
6118 actually be the case. Of course, in all cases the client gets an
6119 appropriate error code.
6121 15. If a lookup fails in an ACL condition, a message about the failure may
6122 be available; it is used if testing the ACL cannot continue, because most
6123 such messages specify what the cause of the deferral is. However, some
6124 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6125 that caused an old message to be retained and used if a later statement
6126 caused a defer, replacing the real cause of the deferral.
6128 16. If an IP address had so many PTR records that the DNS lookup buffer
6129 was not large enough to hold them, Exim could crash while trying to process
6130 the truncated data. It now detects and logs this case.
6132 17. Further to 4.21/58, another change has been made: if (and only if) the
6133 first line of a message (the first header line) ends with CRLF, a bare LF
6134 in a subsequent header line has a space inserted after it, so as not to
6135 terminate the header.
6137 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6138 unnecessarily, used atoi() instead of strtol(), and didn't check the
6139 termination when getting file sizes from file names by regex.
6141 19. Completely re-implemented the support for maildirsize files, in the light
6142 of a number of problems with the previous contributed implementation
6143 (4.30/29). In particular:
6145 . If the quota is zero, the maildirsize file is maintained, but no quota is
6148 . If the maildir directory does not exist, it is created before any attempt
6149 to write a maildirsize file.
6151 . The quota value in the file is just a cache; if the quota is changed in
6152 the transport, the new value overrides.
6154 . A regular expression is available for excluding directories from the
6157 20. The autoreply transport checks the characters in options that define the
6158 message's headers; it allows continued headers, but it was checking with
6159 isspace() after an embedded newline instead of explicitly looking for a
6162 21. If all the "regular" hosts to which an address was routed had passed their
6163 expiry times, and had not reached their retry times, the address was
6164 bounced, even if fallback hosts were defined. Now Exim should go on to try
6167 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6168 equivalent code in the SMTP transport. Some hosts send humungous responses
6169 to HELO/EHLO, more than 1024 it seems.
6171 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6172 gives compiler warnings in some environments. I've now done it "properly",
6175 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6176 (because of problems with the built-in one) was declared to return uschar *
6177 instead of char *, causing compiler failure.
6179 25. Fixed a file descriptor leak when processing alias/forward files.
6181 26. Fixed a minor format string issue in dbfn.c.
6183 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6185 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6186 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6189 29. When a sender address is verified, it is cached, to save repeating the test
6190 when there is more than one recipient in a message. However, when the
6191 verification involves a callout, it is possible for different callout
6192 options to be set for different recipients. It is too complicated to keep
6193 track of this in the cache, so now Exim always runs a verification when a
6194 callout is required, relying on the callout cache for the optimization.
6195 The overhead is duplication of the address routing, but this should not be
6198 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6199 to be verified with callout=postmaster, and the main callout worked but the
6200 postmaster check failed, the verification correctly failed. However, if a
6201 subsequent RCPT command asked for sender verification *without* the
6202 postmaster check, incorrect caching caused this verification also to fail,
6205 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6206 it was not caching the DNS options (qualify_single, search_parents) that
6207 were used when the lookup failed. A subsequent lookup with different
6208 options therefore always gave the same answer, though there were cases
6209 where it should not have. (Example: a "domains = !$mx_any" option on a
6210 dnslookup router: the "domains" option is always processed without any
6211 widening, but the router might have qualify_single set.) Now Exim uses the
6212 cached value only when the same options are set.
6214 32. Added John Jetmore's "exipick" utility to the distribution.
6216 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6217 than a timeout (e.g. a certificate is required, and is not provided), an
6218 Exim server now closes the connection immediately. Previously it waited for
6219 the client to close - but if the client is SSL, it seems that they each
6220 wait for each other, leading to a delay before one of them times out.
6222 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6223 maintained 0.8.x compatibility because I don't think many are using it, and
6224 it is clearly obsolete.
6226 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6229 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6230 client certificate was expired. A simple patch fixes this, though I don't
6231 understand the full logic of why the verify callback is called multiple
6234 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6235 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6236 which causes problems with some clients (such as the Certicom SSL Plus
6237 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6238 disables the coutermeasure allowing Eudora to connect."
6240 38. Exim was not checking that a write() to a log file succeeded. This could
6241 lead to Bad Things if a log got too big, in particular if it hit a file
6242 size limit. Exim now panics and dies if it cannot write to a log file, just
6243 as it does if it cannot open a log file.
6245 39. Modified OS/Makefile-Linux so that it now contains
6247 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6249 The two -D definitions ensure that Exim is compiled with large file
6250 support, which makes it possible to handle log files that are bigger than
6253 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6254 instance) a domain was checked against a named list that involved a lookup,
6255 causing $domain_data to be set, then another domain was checked against the
6256 same list, then the first domain was re-checked, the value of $domain_data
6257 after the final check could be wrong. In particular, if the second check
6258 failed, it could be set empty. This bug probably also applied to
6261 41. The strip_trailing_dot option was not being applied to the address given
6262 with the -f command-line option.
6264 42. The code for reading a message's header from the spool was incrementing
6265 $received_count, but never initializing it. This meant that the value was
6266 incorrect (doubled) while delivering a message in the same process in which
6267 it was received. In the most common configuration of Exim, this never
6268 happens - a fresh exec is done - but it can happen when
6269 deliver_drop_privilege is set.
6271 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6272 it now includes up to 150 characters of the unexpected data in the log
6275 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6276 and building data strings. The size of both of these buffers was 10 000
6277 bytes - far larger than anybody would *ever* want, thought I. Needless to
6278 say, somebody hit the limit. I have increased the maximum line length to
6279 20 000 and the maximum data length of concatenated lines to 100 000. I have
6280 also fixed two bugs, because there was no checking on these buffers. Tsk,
6281 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6282 buffer is too small.
6284 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6285 lsearch lookups. Now it does.
6287 46. When parsing a route_list item in a manualroute router, a fixed-length
6288 buffer was used for the list of hosts. I made this 1024 bytes long,
6289 thinking that nobody would ever have a list of hosts that long. Wrong.
6290 Somebody had a whole pile of complicated expansion conditions, and the
6291 string was silently truncated, leading to an expansion error. It turns out
6292 that it is easier to change to an unlimited length (owing to other changes
6293 that have happened since this code was originally written) than to build
6294 structure for giving a limitation error. The length of the item that
6295 expands into the list of hosts is now unlimited.
6297 47. The lsearch lookup could not handle data where the length of text line was
6298 more than 4095 characters. Such lines were truncated, leading to shortened
6299 data being returned. It should now handle lines of any length.
6301 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6302 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6305 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6306 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6307 no longer happens in comment lines. A list of replacements is now placed
6308 at the head of all of the source files, except those whose only change is
6309 to replace PERL_COMMAND in the very first #! line.
6311 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6312 messages on the queue, with a bottom-up merge sort, using code contributed
6313 by Michael Haardt. This should make operations like -bp somewhat faster on
6314 large queues. It won't affect queue runners, except when queue_run_in_order
6317 51. Installed eximstats 1.31 in the distribution.
6319 52. Added support for SRV lookups to the dnslookup router.
6321 53. If an ACL referred to $message_body or $message_body_end, the value was not
6322 reset for any messages that followed in the same SMTP session.
6324 54. The store-handling optimization for building very long strings was not
6325 differentiating between the different store pools. I don't think this
6326 actually made any difference in practice, but I've tidied it.
6328 55. While running the routers to verify a sender address, $sender_address
6329 was still set to the sender address. This is wrong, because when routing to
6330 send a bounce to the sender, it would be empty. Therefore, I have changed
6331 it so that, while verifying a sender address, $sender_address is set to <>.
6332 (There is no change to what happens when verifying a recipient address.)
6334 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6335 target A or AAAA records (if not already returned) without resetting the
6336 qualify_single or search_parents options of the DNS resolver. These are
6337 inappropriate in this case because the targets of MX and SRV records must
6338 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6339 target that, when qualified, matched something in the local domain. These
6340 two options are now turned off when doing these lookups.
6342 57. It seems that at least some releases of Reiserfs (which does not have the
6343 concept of a fixed number of inodes) returns zero and not -1 for the
6344 number of available inodes. This interacted badly with check_spool_inodes,
6345 which assumed that -1 was the "no such thing" setting. What I have done is
6346 to check that the total number of inodes is greater than zero before doing
6347 the test of how many are available.
6349 58. When a "warn" ACL statement has a log_message modifier, the message is
6350 remembered, and not repeated. This is to avoid a lot of repetition when a
6351 message has many recipients that cause the same warning to be written.
6352 However, Exim was preserving the list of already written lines for an
6353 entire SMTP session, which doesn't seem right. The memory is now reset if a
6354 new message is started.
6356 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6357 debugging output unless log_rewrite was also set.
6359 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6360 of (int)(handle) when we know that handle contains (void *)(-1).
6362 61. The Exim daemon panic-logs an error return when it closes the incoming
6363 connection. However "connection reset by peer" seems to be common, and
6364 isn't really an error worthy of noting specially, so that particular error
6367 62. When Exim is trying to find all the local interfaces, it used to panic and
6368 die if the ioctl to get the interface flags failed. However, it seems that
6369 on at least one OS (Solaris 9) it is possible to have an interface that is
6370 included in the list of interfaces, but for which you get a failure error
6371 for this call. This happens when the interface is not "plumbed" into a
6372 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6373 failure of the "get flags" call assumes that the interface is down.
6375 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6376 makes life easier for people who are doing arithmetic on fields extracted
6377 from dates, where you often get leading zeros that should not be
6378 interpreted as octal.
6380 64. Added qualify_domain to the redirect router, to override the global
6383 65. If a pathologically long header line contained very many addresses (the
6384 report of this problem mentioned 10 000) and each of them was rewritten,
6385 Exim could use up a very large amount of memory. (It kept on making new
6386 copies of the header line as it rewrote, and never released the old ones.)
6387 At the expense of a bit more processing, the header rewriting function has
6388 been changed so that it no longer eats memory in this way.
6390 66. The generation of the Received: header has been moved from the time that a
6391 message starts to be received, to the time that it finishes. The timestamp
6392 in the Received: header should now be very close to that of the <= log
6393 line. There are two side-effects of this change:
6395 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6396 logged header lines no longer include the local Received: line, because
6397 it has not yet been created. The same applies to a copy of the message
6398 that is returned to a non-SMTP sender when a message is rejected.
6400 (b) When a filter file is tested using -bf, no additional Received: header
6401 is added to the test message. After some thought, I decided that this
6404 This change does not affect the value of $received_for. It is still set
6405 after address rewriting, but before local_scan() is called.
6407 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6409 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6410 gave an unhelpful panic error message, and a defer error. I have managed to
6411 change this behaviour so that it now rejects any supplied certificate,
6412 which seems right, as the list of acceptable certificates is empty.
6414 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6415 gave an unhelpful defer error. I have not managed to make this reject any
6416 supplied certificates, but the error message it gives is "no certificate
6417 supplied", which is not helpful.
6419 70. exigrep's output now also includes lines that are not associated with any
6420 message, but which match the given pattern. Implemented by a patch from
6421 Martin Sluka, which also tidied up the Perl a bit.
6423 71. Recipient callout verification, like sender verification, was using <> in
6424 the MAIL FROM command. This isn't really the right thing, since the actual
6425 sender may affect whether the remote host accepts the recipient or not. I
6426 have changed it to use the actual sender in the callout; this means that
6427 the cache record is now keyed on a recipient/sender pair, not just the
6428 recipient address. There doesn't seem to be a real danger of callout loops,
6429 since a callout by the remote host to check the sender would use <>.
6430 [SEE ABOVE: changed after hitting problems.]
6432 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6433 temporary errors. However, in the case of such a code being given after
6434 the end of a data transmission (i.e. after ".") Exim was failing to write
6435 a retry record for the message. (Yes, there was some broken host that was
6436 actually sending 8xx at this point.)
6438 73. An unknown lookup type in a host list could cause Exim to panic-die when
6439 the list was checked. (An example that provoked this was putting <; in the
6440 middle of a list instead of at the start.) If this happened during a DATA
6441 ACL check, a -D file could be left lying around. This kind of configuration
6442 error no longer causes Exim to die; instead it causes a defer error. The
6443 incident is still logged to the main and panic logs.
6445 74. Buglet left over from Exim 3 conversion. The message "too many messages
6446 in one connection" was written to the rejectlog but not the mainlog, except
6447 when address rewriting (yes!) was being logged.
6449 75. Added write_rejectlog option.
6451 76. When a system filter was run not as root (that is, when system_filter_user
6452 was set), the values of the $n variables were not being returned to the
6453 main process; thus, they were not subsequently available in the $sn
6456 77. Added +return_path_on_delivery log selector.
6458 78. A connection timeout was being treated differently from recipients deferred
6459 when testing hosts_max_try with a message that was older than the host's
6460 retry timeout. (The host should not be counted, thus allowing all hosts to
6461 be tried at least once before bouncing.) This may have been the cause of an
6462 occasionally reported bug whereby a message would remain on the queue
6463 longer than the retry timeout, but would be bounced if a delivery was
6464 forced. I say "may" because I never totally pinned down the problem;
6465 setting up timeout/retry tests is difficult. See also the next item.
6467 79. The ultimate address timeout was not being applied to errors that involved
6468 a combination of host plus message (for example, a timeout on a MAIL
6469 command). When an address resolved to a number of possible hosts, and they
6470 were not all tried for each delivery (e.g. because of hosts_max_try), a
6471 message could remain on the queue longer than the retry timeout.
6473 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6476 81. Fixed an obscure SMTP outgoing bug which required at least the following
6477 conditions: (a) there was another message waiting for the same server;
6478 (b) the server returned 5xx to all RCPT commands in the first message so
6479 that the message was not completed; (c) the server dropped the connection
6480 or gave a negative response to the RSET that Exim sends to abort the
6481 transaction. The observed case was a dropped connection after DATA that had
6482 been sent in pipelining mode. That is, the server had advertised PIPELINING
6483 but was not implementing it correctly. The effect of the bug was incorrect
6484 behaviour, such as trying another host, and this could lead to a crash.
6490 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6491 and daemon.c were passed as pointers to ints; they should have been
6492 pointers to socklen_t variables (which are typically unsigned ints).
6494 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6497 3. Fixed a really odd bug that affected only the testing scheme; patching a
6498 certain fixed string in the binary changed the value of another string that
6499 happened to be identical to the end of the original first string.
6501 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6502 name", it returns that address as the IP address. On some operating
6503 systems (e.g. Solaris), it also passes back the IP address string as the
6504 "host name". However, on others (e.g. Linux), it passes back an empty
6505 string. Exim wasn't checking for this, and was changing the host name to an
6506 empty string, assuming it had been canonicalized.
6508 5. Although rare, it is permitted to have more than one PTR record for a given
6509 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6510 all the names associated with an address, because they do in Solaris.
6511 However, it seems that they do not in Linux for data that comes from the
6512 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6513 I found this out when I moved to a new Linux workstation and tried to run
6514 the Exim test suite.
6516 To get round this problem I have changed the code so that it now does its
6517 own call to the DNS to look up PTR records when searching for a host name.
6518 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6519 addresses that are only in /etc/hosts are still found.
6521 This behaviour is, however, controlled by an option called host_lookup_
6522 order, which defaults to "bydns:byaddr". If people want to use the other
6523 order, or indeed, just use one or the other means of lookup, they can
6524 specify it in this variable.
6526 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6527 some operating systems, this comes back from gethostbyaddr() as an empty
6528 string, and this is what Exim used to test for. However, it seems that in
6529 other systems, "." is yielded. Exim now tests for this case too.
6531 7. The values of check_spool_space and check_log_space are now held internally
6532 as a number of kilobytes instead of an absolute number of bytes. If a
6533 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6534 kilobyte. This means that much larger values can be stored.
6536 8. Exim monitor: an attempt to get the action menu when not actually pointing
6537 at a message produces an empty menu entitled "No message selected". This
6538 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6539 no entries in it ("Shell widget menu has zero width and/or height"). So I
6540 have added a single, blank menu entry in this case.
6542 9. Added ${quote_local_part.
6544 10. MIME decoding is now applied to the contents of Subject: header lines when
6547 11. Now that a reference to $sender_host_address automatically causes a reverse
6548 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6549 host lookup before query-style lookups in lists that might use this
6550 variable. This has therefore been abolished, and the "net-" prefix is no
6551 longer necessary for query-style lookups.
6553 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6554 have been a typo for LFLAGS, so it has been changed.
6556 13. The install script calls Exim with "-C /dev/null" in order to find the
6557 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6558 to be output. However, since Exim outputs its version number before the
6559 error, it didn't break the script. It just looked ugly. I fixed this by
6560 always allowing "-C /dev/null" if the caller is root.
6562 14. Ignore overlarge ACL variable number when reading spool file - insurance
6563 against a later release with more variables having written the file.
6565 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6566 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6567 this, as well as the form without the "IPv6" on the front.
6569 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6570 OS/Makefile-Darwin file.
6572 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6573 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6575 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6576 variable. However, some OS use ints for inodes. I've added cast to long int
6577 to get rid of the compiler warning.
6579 19. I had forgotten to lock out "/../" in configuration file names when
6580 ALT_CONFIG_PREFIX was set.
6582 20. Routers used for verification do not need to specify transports. However,
6583 if such a router generated a host list, and callout was configured, Exim
6584 crashed, because it could not find a port number from the (non-existent)
6585 transport. It now assumes port 25 in this circumstance.
6587 21. Added the -t option to exigrep.
6589 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6590 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6591 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6592 them is set, LOOKUP_LSEARCH is forced.
6594 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6596 24. Added sender and host information to the "rejected by local_scan()" log
6597 line; previously there was no indication of these.
6599 25. Added .include_if_exists.
6601 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6602 Linux. It turns out that not all file systems support this. Apparently some
6603 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6604 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6605 not supported on the file descriptor, is now ignored when Exim is trying to
6606 sync a directory. This applies only to Linux.
6608 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6610 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6611 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6614 29. Added support for maildirsize files from supplied patch (modified a bit).
6616 30. The use of :fail: followed by an empty string could lead Exim to respond to
6617 sender verification failures with (e.g.):
6619 550 Verification failed for <xxx>
6620 550 Sender verify failed
6622 where the first response line was missing the '-' that indicates it is not
6623 the final line of the response.
6625 31. The loop for finding the name of the user that called Exim had a hardwired
6626 limit of 10; it now uses the value of finduser_retries, which is used for
6627 all other user lookups.
6629 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6632 33. Exim was neglecting to zero errno before one call of strtol() when
6633 expanding a string and expecting an integer value. On some systems this
6634 resulted in spurious "integer overflow" errors. Also, it was casting the
6635 result into an int without checking.
6637 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6638 did not work. The code looks as if it has *never* worked, though it appears
6639 to have been documented since at least release 1.62. I have made it work.
6641 35. The "timeout_DNS" error in retry rules, also documented since at least
6642 1.62, also never worked. As it isn't clear exactly what this means, and
6643 clearly it isn't a major issue, I have abolished the feature by treating it
6644 as "timeout", and writing a warning to the main and panic logs.
6646 36. The display of retry rules for -brt wasn't always showing the error code
6649 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6650 timeout_connect_A, timeout_connect_MX.
6652 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6653 to the empty sender.
6655 39. The daemon was not analysing the content of -oX till after it had closed
6656 stderr and disconnected from the controlling terminal. This meant that any
6657 syntax errors were only noted on the panic log, and the return code from
6658 the command was 0. By re-arranging the code a little, I've made the
6659 decoding happen first, so such errors now appear on stderr, and the return
6660 code is 1. However, the actual setting up of the sockets still happens in
6661 the disconnected process, so errors there are still only recorded on the
6664 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6665 connections (as happens on some IP stacks) was logged at start up time as
6666 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6667 it from "IPv6 and IPv4", which means that two separate sockets are being
6670 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6671 says whether AF_INET or AF_INET6 was passed as an argument.
6673 42. Exiwhat output was messed up when time zones were included in log
6676 43. Exiwhat now gives more information about the daemon's listening ports,
6677 and whether -tls-on-connect was used.
6679 44. The "port" option of the smtp transport is now expanded.
6681 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6682 silently ignored. Now an error message is written to the main and panic
6685 46. There's a new ACL modifier called "logwrite" which writes to a log file
6686 as soon as it is encountered.
6688 47. Added $local_user_uid and $local_user_gid at routing time.
6690 48. Exim crashed when trying to verify a sender address that was being
6693 49. Exim was recognizing only a space character after ".include". It now also
6694 recognizes a tab character.
6696 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6697 extracting the relevant information from the specification. The man page no
6698 longer contains scrambled data for the -d option, and I've added a section
6699 at the front about calling Exim under different names.
6701 51. Added "extra_headers" argument to the "mail" command in filter files.
6703 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6706 53. Installed eximstats 1.29.
6708 54. Added transport_filter_timeout as a generic transport option.
6710 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6711 Cc: header lines. This was required by RFC 822, but it not required by RFC
6714 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6715 incoming messages that did not have them. Now it does so only if the
6716 message originates locally, that is, if there is no associated remote host
6717 address. When Resent- header lines are present, this applies to the Resent-
6718 lines rather than the non-Resent- lines.
6720 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6721 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6723 58. Messages for configuration errors now include the name of the main
6724 configuration file - useful now that there may be more than one file in a
6725 list (.included file names were always shown).
6727 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6728 for those rare installations that do not start the daemon as root or run it
6729 setuid root. I've cut out the call to initgroups() if the daemon is not
6732 60. The Exim user and group can now be bound into the binary as text strings
6733 that are looked up at the start of Exim's processing.
6735 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6737 62. Added $mailstore_basename variable.
6739 63. Installed patch to sieve.c from Michael Haardt.
6741 64. When Exim failed to open the panic log after failing to open the main log,
6742 the original message it was trying to log was written to stderr and debug
6743 output, but if they were not available (the usual case in production), it
6744 was lost. Now it is written to syslog before the two lines that record the
6745 failures to open the logs.
6747 65. Users' Exim filters run in subprocesses under the user's uid. It is
6748 possible for a "deliver" command or an alias in a "personal" command to
6749 provoke an address rewrite. If logging of address rewriting is configured,
6750 this fails because the process is not running as root or exim. There may be
6751 a better way of dealing with this, but for the moment (because 4.30 needs
6752 to be released), I have disabled address rewrite logging when running a
6753 filter in a non-root, non-exim process.
6759 1. The buildconfig auxiliary program wasn't quoting the value set for
6760 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6761 not defined. This bug was masked in 4.22 by the effect that was fixed in
6764 2. Some messages that were rejected after a message id was allocated were
6765 shown as "incomplete" by exigrep. It no longer does this for messages that
6766 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6768 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6769 have allow_domain_literals set, the ID did not get logged in the <= line.
6770 Domain literals are now always recognized in Message-ID: header lines.
6772 4. The first argument for a ${extract expansion item is the key name or field
6773 number. Leading and trailing spaces in this item were not being ignored,
6774 causing some misleading effects.
6776 5. When deliver_drop_privilege was set, single queue runner processes started
6777 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6778 same command in the process it spins off) were not dropping privilege.
6780 6. When the daemon running as "exim" started a queue runner, it always
6781 re-executed Exim in the spun-off process. This is a waste of effort when
6782 deliver_drop_privilege is set. The new process now just calls the
6783 queue-runner function directly.
6789 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6792 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6793 ignored. Though the use of -oP was forcing the writing of a pid file, it
6794 was always written to the default place.
6796 3. If the message "no IP address found for host xxxx" is generated during
6797 incoming verification, it is now followed by identification of the incoming
6798 connection (so you can more easily find what provoked it).
6800 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6802 5. Added some features to "harden" Exim a bit more against certain attacks:
6804 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6805 be put in Local/Makefile. This is like the never_users runtime option,
6806 but it cannot be overridden. The default setting is "root".
6808 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6809 prefix string with which any file named in a -C command line option
6812 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6813 is retained for -C and -D only if the caller of Exim is root. Without
6814 it, the exim user may also use -C and -D and retain privilege.
6816 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6817 command line option is disabled.
6819 6. Macro names set by the -D option must start with an upper case letter, just
6820 like macro names defined in the configuration file.
6822 7. Added "dereference=" facility to LDAP.
6824 8. Two instances of the typo "uknown" in the source files are fixed.
6826 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6827 the Configure-Makefile script screwed up while processing it.
6829 10. Incorporated PCRE 4.4.
6831 11. The SMTP synchronization check was not operating right at the start of an
6832 SMTP session. For example, it could not catch a HELO sent before the client
6833 waited for the greeting. There is now a check for outstanding input at the
6834 point when the greeting is written. Because of the duplex, asynchronous
6835 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6836 way, but not yet received, when the check is performed.
6838 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6839 on TCP/IP sockets, because this apparently causes some broken clients to
6842 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6843 unchanged) from the Cygwin maintainer.
6845 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6846 was supported instead of testing for mbx. Effectively a typo.
6848 15. The spa authenticator server code was not checking that the input it
6849 received was valid base64.
6851 16. The debug output line for the "set" modifier in ACLs was not showing the
6852 name of the variable that was being set.
6854 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6856 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6857 lookup on its own. Something else was needed to trigger the lookup. For
6858 example, a match in host_lookup or the need for a host name in a host list.
6859 Now, if $sender_host_name is referenced and the host name has not yet been
6860 looked up, a lookup is performed. If the lookup fails, the variable remains
6861 empty, and $host_lookup_failed is set to "1".
6863 19. Added "eqi" as a case-independent comparison operator.
6865 20. The saslauthd authentication condition could segfault if neither service
6866 nor realm was specified.
6868 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6869 error message that was logged was misleading, and incoming SMTP
6870 connections were dropped. The message is now more accurate, and temporary
6871 errors are given to SMTP connections.
6873 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6874 (except RSET) with a 421 error, until QUIT is received. However, it was
6875 failing to send a response to QUIT.
6877 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6878 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6879 ACL is now run after the helo_try_verify_hosts code.
6881 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6882 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6883 case-independent, so other case variants are also recognized). Apparently
6884 some systems use these upper case variants.
6886 25. If more than two messages were waiting for the same host, and a transport
6887 filter was specified for the transport, Exim sent two messages over the
6888 same TCP/IP connection, and then failed with "socket operation on non-
6889 socket" when it tried to send the third.
6891 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6893 27. The extern definition of crypt16() in expand.c was not being excluded when
6894 the OS had its own crypt16() function.
6896 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6897 as a preferred synonym for return_size_limit, both as an option and as an
6900 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6902 30. Changed the default configuration ACL to relax the local part checking rule
6903 for addresses that are not in any local domains. For these addresses,
6904 slashes and pipe symbols are allowed within local parts, but the sequence
6905 /../ is explicitly forbidden.
6907 31. SPA server authentication was not clearing the challenge buffer before
6910 32. log_message in a "warn" ACL statement was writing to the reject log as
6911 well as to the main log, which contradicts the documentation and doesn't
6912 seem right (because no rejection is happening). So I have stopped it.
6914 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6915 However, I am unable to do any testing of this.
6917 34. Fixed an infelicity in the appendfile transport. When checking directories
6918 for a mailbox, to see if any needed to be created, it was accidentally
6919 using path names with one or more superfluous leading slashes; tracing
6920 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6922 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6923 contents are added to the log line that is written for every discarded
6924 recipient. (Previously a log_message setting was ignored.)
6926 36. The ${quote: operator now quotes the string if it is empty.
6928 37. The install script runs exim in order to find its version number. If for
6929 some reason other than non-existence or emptiness, which it checks, it
6930 could not run './exim', it was installing it with an empty version number,
6931 i.e. as "exim-". This error state is now caught, and the installation is
6934 38. An argument was missing from the function that creates an error message
6935 when Exim fails to connect to the socket for saslauthd authentication.
6936 This could cause Exim to crash, or give a corrupted message.
6938 39. Added isip, isip4, and isip6 to ${if conditions.
6940 40. The ACL variables $acl_xx are now saved with the message, and can be
6941 accessed later in routers, transports, and filters.
6943 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6944 strings in the file are not string-expanded.
6946 42. If a MAIL command specified a SIZE value that was too large to fit into an
6947 int variable, the check against message_size_limit failed. Such values are
6948 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6949 day this will have to be increased, but I don't think I want to be around
6950 when emails are that large.
6957 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6958 iconv() is not standard in FreeBSD.
6960 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6961 IPv6 enabled. The observed symptom was a segmentation fault on return from
6962 the function os_common_find_running_interfaces() in src/os.c.
6964 3. In the check_special_case() function in daemon.c I had used "errno" as an
6965 argument name, which causes warnings on some systems. This was basically a
6966 typo, since it was named "eno" in the comments!
6968 4. The code that waits for the clock to tick (at a resolution of some fraction
6969 of a second) so as to ensure message-id uniqueness was always waiting for
6970 at least one whole tick, when it could have waited for less. [This is
6971 almost certainly not relevant at current processor speeds, where it is
6972 unlikely to ever wait at all. But we try to future-proof.]
6974 5. The function that sleeps for a time interval that includes fractions of a
6975 second contained a race. It did not block SIGALRM between setting the
6976 timer, and suspending (a couple of lines later). If the interval was short
6977 and the sigsuspend() was delayed until after it had expired, the suspension
6978 never ended. On busy systems this could lead to processes getting stuck for
6981 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6982 process, before it forks any delivery processes. The open lookup caching
6983 mechanism meant that the open file or database connection was passed into
6984 the delivery process. The problem was that delivery processes always tidy
6985 up cached lookup data. This could cause a problem for the next delivery
6986 process started by the queue runner, because the external queue runner
6987 process does not know about the closure. So the next delivery process
6988 still has data in the lookup cache. In the case of a file lookup, there was
6989 no problem because closing a file descriptor in a subprocess doesn't affect
6990 the parent. However, if the lookup was caching a connection to a database,
6991 the connection was closed, and the second delivery process was likely to
6992 see errors such as "PGSQL: query failed: server closed the connection
6993 unexpectedly". The problem has been fixed by closing all cached lookups
6994 in a queue runner before running a delivery process.
6996 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6997 seem to have the "const" qualifier which it has on other OS. I've
7000 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7001 *of the same type* (client or server) with the same public name that an
7002 error should be diagnosed.
7004 9. When Exim looked up a host name for an IP address, but failed to find the
7005 original IP address when looking up the host name (a safety check), it
7006 output the message "<ip address> does not match any IP for NULL", which was
7007 confusing, to say the least. The bug was that the host name should have
7008 appeared instead of "NULL".
7010 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7011 user that is built into the binary, and the -C or -D options is used, root
7012 privilege is dropped before the configuration file is read. In addition,
7013 logging is switched to stderr instead of the normal log files. If the
7014 configuration then re-defines the Exim user, the unprivileged environment
7015 is probably not what is expected, so Exim logs a panic warning message (but
7018 However, if deliver_drop_privilege is set, the unprivileged state may well
7019 be exactly what is intended, so the warning has been cut out in that case,
7020 and Exim is allowed to try to write to its normal log files.
7026 1. smtp_return_error_details was not giving details for temporary sender
7027 or receiver verification errors.
7029 2. Diagnose a configuration error if two authenticators have the same public
7032 3. Exim used not to create the message log file for a message until the first
7033 delivery attempt. This could be confusing when incoming messages were held
7034 for policy or load reasons. The message log file is now created at the time
7035 the message is received, and an initial "Received" line is written to it.
7037 4. The automatically generated man page for command line options had a minor
7038 bug that caused no ill effects; however, a more serious problem was that
7039 the procedure for building the man page automatically didn't always
7040 operate. Consequently, release 4.20 contains an out-of-date version. This
7041 shouldn't happen again.
7043 5. When building Exim with embedded Perl support, the script that builds the
7044 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7045 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7047 6. The freeze_tell option was not being used for messages that were frozen on
7048 arrival, either by an ACL or by local_scan().
7050 7. Added the smtp_incomplete_transaction log selector.
7052 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7053 was accepting AUTH without a new EHLO.
7055 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7056 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7059 10. Logging of TCP/IP connections (when configured) now happens in the main
7060 daemon process instead of the child process, so that the TCP/IP connection
7061 count is more accurate (but it can never be perfect).
7063 11. The use of "drop" in a nested ACL was not being handled correctly in the
7064 outer ACL. Now, if condition failure induced by the nested "drop" causes
7065 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7066 or "require"), the connection is dropped.
7068 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7069 that yield "discard" can now be used with an "accept" or a "discard" verb,
7070 but an error is generated for any others (because I can't see a useful way
7071 to define what should happen).
7073 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7074 are now processed in the same way as lines in the Exim configuration file.
7075 In particular, continuation lines are supported.
7077 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7079 15. Added -ti meaning -t -i.
7081 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7082 domains, and warn by logging if others are found.
7084 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7085 returned from GIFCONF when Exim is trying to find the list of interfaces on
7086 a host. The code in os.c has been modified to copy each ifreq to an aligned
7087 structure in all cases.
7089 Also, in some cases, the returned ifreq's were being copied to a 'struct
7090 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7091 means the last couple of bytes of an IPv6 address could be chopped if the
7092 ifreq contained only a normal sockaddr (14 bytes storage).
7094 18. Named domain lists were not supported in the hosts_treat_as_local option.
7095 An entry such as +xxxx was not recognized, and was treated as a literal
7098 19. Ensure that header lines added by a DATA ACL are included in the reject log
7099 if the ACL subsequently rejects the message.
7101 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7102 MD5 (which is deprecated).
7104 21. When testing a filter file using -bf, Exim was writing a message when it
7105 took the sender from a "From " line in the message, but it was not doing so
7106 when it took $return_path from a Return-Path: header line. It now does.
7108 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7109 with a valid header line field name (a series of printing characters
7110 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7112 23. Changed "disc" in the source to "disk" to conform to the documentation and
7113 the book and for uniformity.
7115 24. Ignore Sendmail's -Ooption=value command line item.
7117 25. When execve() failed while trying to run a command in a pipe transport,
7118 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7119 could be confused with a return value of 69 from the command itself. This
7120 has been changed to 127, the value the shell returns if it is asked to run
7121 a non-existent command. The wording for the related log line suggests a
7122 non-existent command as the problem.
7124 26. If received_header_text expands to an empty string, do not add a Received:
7125 header line to the message. (Well, it adds a token one on the spool, but
7126 marks it "old" so that it doesn't get used or transmitted.)
7128 27. Installed eximstats 1.28 (addition of -nt option).
7130 28. There was no check for failure on the call to getsockname() in the daemon
7131 code. This can fail if there is a shortage of resources on the system, with
7132 ENOMEM, for example. A temporary error is now given on failure.
7134 29. Contrary to the C standard, it seems that in some environments, the
7135 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7136 program. Exim now does this explicitly; it affects the formatting of
7137 timestamps using strftime().
7139 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7140 complaints. I've now initialized all the variables, to avoid this.
7142 32. Header lines added by a system filter were not being "seen" during
7143 transport-time rewrites.
7145 33. The info_callback() function passed to OpenSSL is set up with type void
7146 (*)(SSL *, int, int), as described somewhere. However, when calling the
7147 function (actually a macro) that sets it up, the type void(*)() is
7148 expected. I've put in a cast to prevent warnings from picky compilers.
7150 34. If a DNS black list lookup found a CNAME record, but there were no A
7151 records associated with the domain it pointed at, Exim crashed.
7153 35. If a DNS black list lookup returned more than one A record, Exim ignored
7154 all but the first. It now scans all returned addresses if a particular IP
7155 value is being sought. In this situation, the contents of the
7156 $dnslist_value variable are a list of all the addresses, separated by a
7159 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7160 to accept a host name and all its aliases if the forward lookup for any of
7161 them yielded the IP address of the incoming connection. Now it accepts only
7162 those names whose forward lookup yields the correct IP address. Any other
7163 names are discarded. This closes a loophole whereby a rogue DNS
7164 administrator could create reverse DNS records to break through a
7165 wildcarded host restriction in an ACL.
7167 37. If a user filter or a system filter that ran in a subprocess used any of
7168 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7169 the wrong values were passed to the pipe command ($thisaddress had the
7170 value of $0, $0 had the value of $1, etc). This bug was introduced by
7171 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7173 38. Improved the line breaking for long SMTP error messages from ACLs.
7174 Previously, if there was no break point between 40 and 75 characters, Exim
7175 left the rest of the message alone. Two changes have been made: (a) I've
7176 reduced the minimum length to 35 characters; (b) if it can't find a break
7177 point between 35 and 75 characters, it looks ahead and uses the first one
7178 that it finds. This may give the occasional overlong line, but at least the
7179 remaining text gets split now.
7181 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7182 file descriptors might be low, and that setting 1000 would always raise it.
7183 It turns out that in some environments, the limit is already over 1000 and
7184 that lowering it causes trouble. So now Exim takes care not to decrease it.
7186 40. When delivering a message, the value of $return_path is set to $sender_
7187 address at the start of routing (routers may change the value). By an
7188 oversight, this default was not being set up when an address was tested by
7189 -bt or -bv, which affected the outcome if any router or filter referred to
7192 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7193 log only when "message" or "log_message" are set. However, if one of the
7194 conditions was an address verification, or a call to a nested ACL, the
7195 messages generated by the underlying test were being passed through. This
7196 no longer happens. The underlying message is available in $acl_verify_
7197 message for both "message" and "log_message" expansions, so it can be
7198 passed through if needed.
7200 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7201 new expansion $bh_ to give the encoded byte string without charset
7202 translation. Translation happens only if iconv() is available; HAVE_ICONV
7203 indicates this at build time. HEADERS_CHARSET gives the charset to
7204 translate to; headers_charset can change it in the configuration, and
7205 "headers charset" can change it in an individual filter file.
7207 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7208 that creates RFC 2047 encoded "words" labels them as that charset instead
7209 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7210 expansion operator; (ii) when Exim creates a From: line for a local
7211 message; (iii) when a header line is rewritten to include a "phrase" part.
7213 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7214 buggy, causing it to skip the first lines of messages whose message ID
7215 ended in 'D'. This would not have bitten before Exim release 4.14, because
7216 message IDs were unlikely to end in 'D' before then. The effect was to have
7217 incorrect size information for certain domains.
7219 45. #include "config.h" was missing at the start of the crypt16.c module. This
7220 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7223 46. If there was a timeout during a "random" callout check, Exim treated it as
7224 a failure of the random address, and carried on sending RSET and the real
7225 address. If the delay was just some slowness somewhere, the response to the
7226 original RCPT would be taken as a response to RSET and so on, causing
7227 mayhem of various kinds.
7229 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7230 when I implemented it. It didn't allow for the fact that some option values
7231 may legitimately be negative (e.g. size_addition), and it didn't even do
7232 the right test for positive values.
7234 48. Domain names in DNS records are case-independent. Exim always looks them up
7235 in lower case. Some resolvers return domain names in exactly the case they
7236 appear in the zone file, that is, they may contain uppercase letters. Not
7237 all resolvers do this - some return always lower case. Exim was treating a
7238 change of case by a resolver as a change of domain, similar to a widening
7239 of a domain abbreviation. This triggered its re-routing code and so it was
7240 trying to route what was effectively the same domain again. This normally
7241 caused routing to fail (because the router wouldn't handle the domain
7242 twice). Now Exim checks for this case specially, and just changes the
7243 casing of the domain that it ultimately uses when it transmits the message
7246 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7249 50. If a filter generated a file delivery with a non-absolute name (possible if
7250 no home directory exists for the router), the forbid_file option was not
7253 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7254 the existing equality matching.
7256 52. Exim was using ints instead of ino_t variables in some places where it was
7257 dealing with inode numbers.
7259 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7260 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7261 called TMPDIR, and if it finds it is different, it changes its value.
7263 54. The smtp_printf() function is now made available to local_scan() so
7264 additional output lines can be written before returning. There is also an
7265 smtp_fflush() function to enable the detection of a dropped connection.
7266 The variables smtp_input and smtp_batched_input are exported to
7269 55. Changed the default runtime configuration: the message "Unknown user"
7270 has been removed from the ACL, and instead placed on the localuser router,
7271 using the cannot_route_message feature. This means that any verification
7272 failures that generate their own messages won't get overridden. Similarly,
7273 the "Unrouteable address" message that was in the ACL for unverifiable
7274 relay addresses has also been removed.
7276 56. Added hosts_avoid_esmtp to the smtp transport.
7278 57. The exicyclog script was not checking for the esoteric option
7279 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7280 will work only if exicyclog is run under the appropriate euid.
7282 58. Following a discussion on the list, the rules by which Exim recognises line
7283 endings on incoming messages have been changed. The -dropcr and drop_cr
7284 options are now no-ops, retained only for backwards compatibility. The
7285 following line terminators are recognized: LF CRLF CR. However, special
7286 processing applies to CR:
7288 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7289 nor a local message in the state where . is a terminator.
7291 (ii) If a bare CR is encountered in a header line, an extra space is added
7292 after the line terminator so as not to end the header. The reasoning
7293 behind this is that bare CRs in header lines are most likely either
7294 to be mistakes, or people trying to play silly games.
7296 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7297 was being incorrectly given as 18 bytes larger than it should have been.
7298 This is a VOB (very old bug).
7300 60. This may never have affected anything current, but just in case it has:
7301 When the local host is found other than at the start of a list of hosts,
7302 the local host, those with the same MX, and any that follow, are discarded.
7303 When the list in question was part of a longer list of hosts, the following
7304 hosts (not currently being processed) were also being discarded. This no
7305 longer happens. I'm not sure if this situation could ever has previously
7308 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7311 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7312 header. This is something that is recommended in a new Internet Draft, and
7313 is something that is documented as being done by Sendmail. There are two
7314 possible values. For messages generated by the autoreply transport, Exim
7317 Auto-Submitted: auto-replied
7319 whereas for all other generated messages (e.g. bounces) it adds
7321 Auto-Submitted: auto-generated
7323 63. The "personal" condition in filters now includes a test for the
7324 Auto-Submitted: header. If it contains the string "auto-" the message it
7325 not considered personal.
7327 64. Added rcpt_include_affixes as a generic transport option.
7329 65. Added queue_only_override (default true).
7331 66. Added the syslog_duplication option.
7333 67. If what should have been the first header line of a message consisted of
7334 a space followed by a colon, Exim was mis-interpreting it as a header line.
7335 It isn't of course - it is syntactically invalid and should therefore be
7336 treated as the start of the message body. The misbehaviour could have
7337 caused a number of strange effects, including loss of data in subsequent
7338 header lines, and spool format errors.
7340 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7341 client host had authenticated. This control can now be exercised by an ACL
7342 for more flexibility.
7344 69. By default, callouts do not happen when testing with -bh. There is now a
7345 variant, -bhc, which does actually run the callout code, including
7346 consulting and updating the callout cache.
7348 70. Added support for saslauthd authentication, courtesy of Alexander
7351 71. If statvfs() failed on the spool or log directories while checking their
7352 size for availability, Exim confusingly gave the error "space shortage".
7353 Furthermore, in debugging mode it crashed with a floating point exception.
7354 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7355 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7356 serious problem, Exim now writes to the main and panic logs when this
7357 happens, with details of the failure. It then refuses to accept the
7358 incoming message, giving the message "spool directory problem" or "log
7359 directory problem" with a 421 code for SMTP messages.
7361 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7362 0, 1, and 2 exist, because some OS complain for execs without them (see
7363 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7364 descriptors. However, the code omitted to check that the open succeeded,
7365 causing mysterious errors if for some reason the permissions on /dev/null
7366 got screwed. Now Exim writes a message to the main and panic logs, and
7367 bombs out if it can't open /dev/null.
7369 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7370 interact so that it is all more flexible. It is supposed to remain
7371 backwards compatible. Also added extra_local_interfaces.
7373 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7374 to bomb out with an assertion failure - to the client this appears as a
7375 connection drop. This problem occurs in the part of the code that was taken
7376 from the Samba project. Fortunately, the assertion is in a very simple
7377 function, so I have fixed this by reproducing the function inline in the
7378 one place where it is called, and arranging for authentication to fail
7379 instead of killing the process with assert().
7381 75. The SPA client code was not working when the server requested OEM rather
7382 than Unicode encoding.
7384 76. Added code to make require_files with a specific uid setting more usable in
7385 the case where statting the file as root fails - usually a non-root-mounted
7386 NFS file system. When this happens and the failure is EACCES, Exim now
7387 forks a subprocess and does the per-uid checking as the relevant uid.
7389 77. Added process_log_path.
7391 78. If log_file_path was not explicitly set, a setting of check_log_space or
7392 check_log_inodes was ignored.
7394 79. If a space check for the spool or log partitions fails, the incident is now
7395 logged. Of course, in the latter case the data may get lost...
7397 80. Added the %p formatting code to string_format() so that it can be used to
7398 print addresses in debug_print(). Adjusted all the address printing in the
7399 debugging in store.c to use %p rather than %d.
7401 81. There was a concern that a line of code in smtp_in.c could overflow a
7402 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7403 initially expressed, the concern was not well-founded, because trailing
7404 spaces are removed early. However, if the trailing spaces were followed by
7405 a NULL, they did not get removed, so the overflow was possible. Two fixes
7408 (a) I re-wrote the offending code in a cleaner fashion.
7409 (b) If an incoming SMTP command contains a NULL character, it is rejected
7412 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7413 runs initgroups(), so that if the Exim user is in any additional groups,
7414 they will be used during message reception.
7420 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob