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/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
17 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
18 buffer overrun for (non-chunking) other transports.
20 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
21 TLS1.3, means that a server rejecting a client certificate is not visible
22 to the client until the first read of encrypted data (typically the
23 response to EHLO). Add detection for that case and treat it as a failed
24 TLS connection attempt, so that the normal retry-in-clear can work (if
27 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
28 and/or domain. Found and fixed by Jason Betts.
30 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
31 configuration). If a CNAME target was not a wellformed name pattern, a
34 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
35 the OS reports them interleaved with other addresses.
37 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
38 used both for input and for a verify callout, both encrypted, SMTP
39 responses being sent by the server could be lost. This resulted in
40 dropped connections and sometimes bounces generated by a peer sending
43 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
44 string. Previously it was possible to cause undefined behaviour in a
45 library routine (usually a crash). Found by "zerons".
47 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
50 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
51 API was removed, so update to use the newer ones.
54 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
55 to changes apparently associated with TLS1.3 handling some of the APIs
56 previously used were either nonfunctional or inappropriate. Strings
57 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
58 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
59 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
60 This affects log line X= elements, the $tls_{in,out}_cipher variables,
61 and the use of specific cipher names in the encrypted= ACL condition.
63 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
64 verification result was not updated unless hosts_require_ocsp applied.
66 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
67 queue_list_requires_admin set to false, non-admin users were denied the
74 JH/01 Remove code calling the customisable local_scan function, unless a new
75 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
77 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
78 non-signal-safe functions being used.
80 JH/03 Bug 2269: When presented with a received message having a stupidly large
81 number of DKIM-Signature headers, disable DKIM verification to avoid
82 a resource-consumption attack. The limit is set at twenty.
84 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
85 report of oldest_pass in ${authres } in consequence, and separate out
86 some descriptions of reasons for verification fail.
88 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
89 files in the spool were present and unlocked. A queue-runner could spot
90 them, resulting in a duplicate delivery. Fix that by doing the unlock
91 after the unlink. Investigation by Tim Stewart. Take the opportunity to
92 add more error-checking on spoolfile handling while that code is being
95 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
96 No known attacks, no CVE, this is defensive hardening.
98 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
99 a queue-runner could start a delivery while other operations were ongoing.
100 Cutthrough delivery was a common victim, resulting in duplicate delivery.
101 Found and investigated by Tim Stewart. Fix by using the open message data
102 file handle rather than opening another, and not locally closing it (which
103 releases a lock) for that case, while creating the temporary .eml format
104 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
106 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
107 $sender_verify_failure/$recipient_verify_failure to "random".
109 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
112 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
113 Previously this would segfault.
115 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
118 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
119 like zero, since the resolver should be doing this for us, But we need one
120 as a CNAME but no MX presence gets the CNAME returned; we need to check
121 that doesn't point to an MX to declare it "no MX returned" rather than
122 "error, loop". A new main option is added so the older capability of
123 following some limited number of chain links is maintained.
125 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
127 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
128 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
129 now-deprecated earlier definitions used only specified the range up to TLS
130 1.2 (in the older-version library docs).
132 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
134 JH/15 Rework TLS client-side context management. Stop using a global, and
135 explicitly pass a context around. This enables future use of TLS for
136 connections to service-daemons (eg. malware scanning) while a client smtp
137 connection is using TLS; with cutthrough connections this is quite likely.
139 JH/16 Fix ARC verification to do AS checks in reverse order.
141 JH/17 Support a "tls" option on the ${readsocket } expansion item.
143 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
144 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
145 Previously the "utf8" would be re-prepended for every additional message.
147 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
148 Previously thery were accepted, resulting in issues when attempting to
149 forward messages to a non-supporting MTA.
151 PP/02 Let -n work with printing macros too, not just options.
153 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
154 one parent address was copied, and bogus data was used at delivery-logging
155 time. Either a crash (after delivery) or bogus log data could result.
156 Discovery and analysis by Tim Stewart.
158 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
159 Previously if the string ended mid-character, we did not insert the
160 promised '?' replacement.
162 PP/04 Documentation: current string operators work on bytes, not codepoints.
164 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
165 should pack well giving a smaller memory footprint so better caching and
166 therefore performance. Group the declarations where this can't be done so
167 that the byte-sized flag variables are not interspersed among pointer
168 variables, giving a better chance of good packing by the compiler.
170 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
171 non-null, to avoid issues with sites running BATV. Previously reports were
172 sent with an empty envelope sender so looked like bounces.
174 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
175 The ignore_error flag wasn't being returned from the filter subprocess so
176 was not set for later routers. Investigation and fix by Matthias Kurz.
178 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
179 and a msg:complete for the whole, when a message is manually removed using
180 -Mrm. Developement by Matthias Kurz, hacked on by JH.
182 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
183 a "Gnu special" function, asprintf() in the DB utility binary builds; I
184 hope that is portable enough.
186 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
187 requiring a known-CA anchor certificate; make it now rely entirely on the
188 TLSA as an anchor. Checking the name on the leaf cert against the name
189 on the A-record for the host is still done for TA (but not for EE mode).
191 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
192 included in delivery lines for non-proxied connections, when compiled with
193 SUPPORT_SOCKS and running with proxy logging enabled.
195 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
196 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
197 move the existing event to fire before the normal logging of message
198 failure so that custom logging is bracketed by normal logging.
200 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
201 msg:fail:internal event. Developement by Matthias Kurz.
203 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
204 far too small for todays use of crypto signatures stored there. Go all
205 the way to the max DNS message size of 64kB, even though this might be
206 overmuch for IOT constrained device use.
208 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
209 copy a string over itself. The library routine is documented as not
210 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
212 JH/32 For main options check_spool_space and check_inode_space, where the
213 platform supports 64b integers, support more than the previous 2^31 kB
214 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
215 the previous G, M, k.
217 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
218 $authenticated_fail_id variable on authentication failure. Previously
221 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
222 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
223 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
224 GNUTLS_SEC_PARAM_MEDIUM.
226 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
227 side. Previously we would continue as if no SNI had been received.
229 JH/36 Harden the handling of string-lists. When a list consisted of a sole
230 "<" character, which should be a list-separator specification, we walked
231 off past the nul-terimation.
233 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
234 causes) even when the retry time is not yet met. Previously they were
235 not, meaning that when (say) an account was over-quota and temp-rejecting,
236 and multiple senders' messages were queued, only one sender would get
237 notified on each configured delay_warning cycle.
239 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
241 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
242 cipher-suites, an error can be left on the stack even for a succeeding
243 accept; this results in impossible error messages when a later operation
246 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
247 return error codes indicating retry. Under TLS1.3 this becomes required.
249 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
250 it only wrote the new authenticators, resulting in a lack of tracking of
251 peer changes of ESMTP extensions until the next cache flush.
253 JH/41 Fix the loop reading a message header line to check for integer overflow,
254 and more-often against header_maxsize. Previously a crafted message could
255 induce a crash of the recive process; now the message is cleanly rejected.
257 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
258 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
264 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
265 When redis_servers is set to a list of > 1 element, and the Redis servers
266 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
267 case of MOVED into a DEFER case instead, thus moving the query onto the
268 next server in the list. For a cluster of N elements, all N servers must
269 be defined in redis_servers.
271 GF/02 Catch and remove uninitialized value warning in exiqsumm
272 Check for existence of @ARGV before looking at $ARGV[0]
274 JH/01 Replace the store_release() internal interface with store_newblock(),
275 which internalises the check required to safely use the old one, plus
276 the allocate and data copy operations duplicated in both (!) of the
277 extant use locations.
279 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
280 modifier. This matches the restriction on the commandline.
282 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
283 Previously only the last row was returned.
285 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
286 we assumed that tags in the header were well-formed, and parsed the
287 element content after inspecting only the first char of the tag.
288 Assumptions at that stage could crash the receive process on malformed
291 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
292 While running the DKIM ACL we operate on the Permanent memory pool so that
293 variables created with "set" persist to the DATA ACL. Also (at any time)
294 DNS lookups that fail create cache records using the Permanent pool. But
295 expansions release any allocations made on the current pool - so a dnsdb
296 lookup expansion done in the DKIM ACL releases the memory used for the
297 DNS negative-cache, and bad things result. Solution is to switch to the
298 Main pool for expansions.
299 While we're in that code, add checks on the DNS cache during store_reset,
300 active in the testsuite.
301 Problem spotted, and debugging aided, by Wolfgang Breyha.
303 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
304 When none of the hosts presented to a transport match an already-open
305 connection, close it and proceed with the list. Previously we would
306 queue the message. Spotted by Lena with Yahoo, probably involving
309 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
310 Previously a spurious "250 OK id=" response was appended to the proper
313 JH/08 The "support for" informational output now, which built with Content
314 Scanning support, has a line for the malware scanner interfaces compiled
315 in. Interface can be individually included or not at build time.
317 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
318 by the template makefile "src/EDITME". The "STREAM" support for an older
319 ClamAV interface method is removed.
321 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
322 rows affected is given instead).
324 JH/11 The runtime Berkeley DB library version is now additionally output by
325 "exim -d -bV". Previously only the compile-time version was shown.
327 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
328 SMTP connection. Previously, when one had more receipients than the
329 first, an abortive onward connection was made. Move to full support for
330 multiple onward connections in sequence, handling cutthrough connection
331 for all multi-message initiating connections.
333 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
334 routers. Previously, a multi-recipient message would fail to match the
335 onward-connection opened for the first recipient, and cause its closure.
337 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
338 a timeout on read on a GnuTLS initiating connection, resulting in the
339 initiating connection being dropped. This mattered most when the callout
340 was marked defer_ok. Fix to keep the two timeout-detection methods
343 JH/15 Relax results from ACL control request to enable cutthrough, in
344 unsupported situations, from error to silently (except under debug)
345 ignoring. This covers use with PRDR, frozen messages, queue-only and
348 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
350 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
351 metadata, resulting in a crash in free().
353 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
354 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
355 Broken also in d185889f4, with init system revamp.
357 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
358 Previously we abruptly closed the connection after reading a malware-
359 found indication; now we go on to read the "scan ok" response line,
362 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
363 ACL. Previously, a crash would result.
365 JH/19 Speed up macro lookups during configuration file read, by skipping non-
366 macro text after a replacement (previously it was only once per line) and
367 by skipping builtin macros when searching for an uppercase lead character.
369 JH/20 DANE support moved from Experimental to mainline. The Makefile control
370 for the build is renamed.
372 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
373 was allocated for every new TLS startup, meaning one per message. Fix
374 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
376 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
377 reported the original. Fix to report (as far as possible) the ACL
378 result replacing the original.
380 JH/23 Fix memory leak during multi-message connections using STARTTLS under
381 OpenSSL. Certificate information is loaded for every new TLS startup,
382 and the resources needed to be freed.
384 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
386 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
389 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
390 DATA response info to the (existing) per-recipient response info for
391 the "C=" log element. It can have useful tracking info from the
392 destination system. Patch from Simon Arlott.
394 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
395 length value. Previously this would segfault.
397 HS/02 Support Avast multiline protoocol, this allows passing flags to
398 newer versions of the scanner.
400 JH/28 Ensure that variables possibly set during message acceptance are marked
401 dead before release of memory in the daemon loop. This stops complaints
402 about them when the debug_store option is enabled. Discovered specifically
403 for sender_rate_period, but applies to a whole set of variables.
404 Do the same for the queue-runner and queue-list loops, for variables set
405 from spool message files. Do the same for the SMTP per-message loop, for
406 certain variables indirectly set in ACL operations.
408 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
409 as a multi-recipient message from a mailinglist manager). The coding had
410 an arbitrary cutoff number of characters while checking for more input;
411 enforced by writing a NUL into the buffer. This corrupted long / fast
412 input. The problem was exposed more widely when more pipelineing of SMTP
413 responses was introduced, and one Exim system was feeding another.
414 The symptom is log complaints of SMTP syntax error (NUL chars) on the
415 receiving system, and refused recipients seen by the sending system
416 (propating to people being dropped from mailing lists).
417 Discovered and pinpointed by David Carter.
419 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
420 replaced by the ${authresults } expansion.
422 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
424 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
425 allows proper process termination in container environments.
427 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
428 Previously the "final dot" had a newline after it; ensure it is CR,LF.
430 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
431 and "err_perm", deprecated since 4.83 when the RFC-defined words
432 "temperror" and "permerror" were introduced.
434 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
435 transport-filters or DKIM-signing. The restriction was lost in the
436 consolidation of verify-callout and delivery SMTP handling.
437 Extend the restriction to also cover ARC-signing.
439 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
440 in defer=pass mode supply a 450 to the initiator. Previously the message
443 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
444 tls_require_ciphers is used as before.
446 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
447 "pass_unscanned". Only tmpfails from the scanner are written to
448 the paniclog, as they may require admin intervention (permission
449 denied, license issues). Other scanner errors (like decompression
450 bombs) do not cause a paniclog entry.
452 JH/36 Fix reinitialisation of DKIM logging variable between messages.
453 Previously it was possible to log spurious information in receive log
456 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
457 triggered odd behaviour from Outlook Express clients.
459 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
462 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
463 since the IETF WG has not yet settled on that versus the original
464 "bare" representation.
466 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
467 Previously the millisecond value corrupted the output.
468 Fix also for syslog_pid=no and log_selector +pid, for which the pid
469 corrupted the output.
475 JH/01 Rework error string handling in TLS interface so that the caller in
476 more cases is responsible for logging. This permits library-sourced
477 string to be attached to addresses during delivery, and collapses
478 pairs of long lines into single ones.
480 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
481 during configuration. Wildcards are allowed and expanded.
483 JH/02 Rework error string handling in DKIM to pass more info back to callers.
484 This permits better logging.
486 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
487 do not close it down and have the child transport start it up again on
488 the passed-on TCP connection. Instead, proxy the child (and any
489 subsequent ones) for TLS via a unix-domain socket channel. Logging is
490 affected: the continued delivery log lines do not have any DNSSEC, TLS
491 Certificate or OCSP information. TLS cipher information is still logged.
493 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
494 identical IP addresses on different listening ports. Will also affect
497 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
498 add noisy ifdef guards to special-case this sillyness.
499 Patch from Bernd Kuhls.
501 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
502 than 255 are no longer allowed.
504 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
505 Disable the session-cache too, which might reduce our load. Since we
506 currrectly use a new context for every connection, both as server and
507 client, there is no benefit for these.
508 GnuTLS appears to not support tickets server-side by default (we don't
509 call gnutls_session_ticket_enable_server()) but client side is enabled
510 by default on recent versions (3.1.3 +) unless the PFS priority string
513 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
514 <https://reproducible-builds.org/specs/source-date-epoch/>.
516 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
517 the check for any unsuccessful recipients did not notice the limit, and
518 erroneously found still-pending ones.
520 JH/08 Pipeline CHUNKING command and data together, on kernels that support
521 MSG_MORE. Only in-clear (not on TLS connections).
523 JH/09 Avoid using a temporary file during transport using dkim. Unless a
524 transport-filter is involved we can buffer the headers in memory for
525 creating the signature, and read the spool data file once for the
526 signature and again for transmission.
528 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
529 4.77 as the kernel support then wasn't solid, having issues in 64bit
530 mode. Now, it's been long enough. Add support for FreeBSD also.
532 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
533 case where the routing stage had gathered several addresses to send to
534 a host before calling the transport for the first, we previously failed
535 to close down TLS in the old transport process before passing the TCP
536 connection to the new process. The new one sent a STARTTLS command
537 which naturally failed, giving a failed delivery and bloating the retry
538 database. Investigation and fix prototype from Wolfgang Breyha.
540 JH/12 Fix check on SMTP command input synchronisation. Previously there were
541 false-negatives in the check that the sender had not preempted a response
542 or prompt from Exim (running as a server), due to that code's lack of
543 awareness of the SMTP input buffering.
545 PP/04 Add commandline_checks_require_admin option.
546 Exim drops privileges sanely, various checks such as -be aren't a
547 security problem, as long as you trust local users with access to their
548 own account. When invoked by services which pass untrusted data to
549 Exim, this might be an issue. Set this option in main configuration
550 AND make fixes to the calling application, such as using `--` to stop
553 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
554 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
555 responses to those, into a single TLS record each way (this usually means
556 a single packet). As a side issue, smtp_enforce_sync now works on TLS
559 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
560 affects you only if you're dancing at the edge of the param size limits.
561 If you are, and this message makes sense to you, then: raise the
562 configured limit or use OpenSSL 1.1. Nothing we can do for older
565 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
566 cmdline element to get the documented default one. Previously it was
569 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
570 are unsuable for non-message-specific reasons - eg. connection timeout,
571 banner-time rejection.
573 JH/16 Fix logging of delivery remote port, when specified by router, under
576 PP/06 Repair manualroute's ability to take options in any order, even if one
577 is the name of a transport.
580 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
582 JH/17 Change the list-building routines interface to use the expanding-string
583 triplet model, for better allocation and copying behaviour.
585 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
586 Previously it was constructed the first time a possibly-matching string
587 was met in the configuration file input during startup; now it is done
590 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
591 compatible one, to avoid the (poorly documented) possibility of a config
592 file in the working directory redirecting the DB files, possibly correpting
593 some existing file. CVE-2017-10140 assigned for BDB.
595 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
596 cache-hot. Previously, although the result was properly cached, the
597 initial verify call returned a defer.
599 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
600 the main verify for receipient in uncached-mode.
602 JH/22 Retire historical build files to an "unsupported" subdir. These are
603 defined as "ones for which we have no current evidence of testing".
605 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
606 if present. Previously it was ignored.
608 JH/24 Start using specified-initialisers in C structure init coding. This is
609 a C99 feature (it's 2017, so now considered safe).
611 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
612 if was a fixed-sized field and bitmask ops via macros; it is now more
615 PP/07 GitHub PR 56: Apply MariaDB build fix.
616 Patch provided by Jaroslav Škarvada.
618 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
619 during Coverity cleanups [4.87 JH/47]
620 Diagnosis and fix provided by Michael Fischer v. Mollard.
622 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
623 the right size to place the terminating semicolon on its own folded
624 line, the header hash was calculated to an incorrect value thanks to
625 the (relaxed) space the fold became.
627 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
628 and confused the parent.
630 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
631 which could crash as a result. This could lead to undeliverable messages.
633 JH/28 Logging: "next input sent too soon" now shows where input was truncated
636 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
637 matters on fast-turnover and PID-randomising systems, which were getting
638 out-of-order delivery.
640 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
641 a possibly-overlapping copy. The symptom was that "Remote host closed
642 connection in response to HELO" was logged instead of the actual 4xx
645 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
646 Previously only that bufferd was discarded, resulting in SYMTP command
649 JH/32 DKIM: when a message has multiple signatures matching an identity given
650 in dkim_verify_signers, run the dkim acl once for each. Previously only
651 one run was done. Bug 2189.
653 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
654 "panic the current process" to "deliberately defer". The panic log is
655 still written with the problem list name; the mail and reject logs now
656 get a temp-reject line for the message that was being handled, saying
657 something like "domains check lookup or other defer". The SMTP 451
658 message is still "Temporary local problem".
660 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
661 A crafted sequence of BDAT commands could result in in-use memory beeing
662 freed. CVE-2017-16943.
664 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
665 from SMTP input. Previously it was always done; now only done for DATA
666 and not BDAT commands. CVE-2017-16944.
668 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
669 to the message (such as an overlong header line). Previously this was
670 not done and we did not exit BDAT mode. Followon from the previous item
671 though a different problem.
677 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
678 than -2003 did; needs libidn2 in addition to libidn.
680 JH/02 The path option on a pipe transport is now expanded before use.
682 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
683 Patch provided by "Björn", documentation fix added too.
685 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
686 missing a wire-to-host endian conversion.
688 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
689 close after a BDAT command line could be taken as a following command,
690 giving a synch failure. Fix by only checking for synch immediately
691 before acknowledging the chunk.
693 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
694 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
695 macro. Patches provided by Josh Soref.
697 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
698 Previously we did not; the RFC seems ambiguous and VRFY is not listed
699 by IANA as a service extension. However, John Klensin suggests that we
702 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
703 the dkim code may be unix-mode line endings rather than smtp wire-format
704 CRLF, so prepend a CR to any bare LF.
706 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
707 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
709 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
710 the first were themselves being wrongly included in the feed into dkim
711 processing; with most chunk sizes in use this resulted in an incorrect
712 body hash calculated value.
714 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
715 DKIM signature block, for verification. Although advised against by
716 standards it is specifically not ruled illegal.
718 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
720 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
721 missing a body hash (the bh= tag).
723 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
724 It seems that HAProxy sends the Proxy Protocol information in clear and
725 only then does a TLS startup, so do the same.
727 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
728 TCP connections (such as for Spamd) unless the daemon successfully set
729 Fast Open mode on its listening sockets. This fixes breakage seen on
730 too-old kernels or those not configured for Fast Open, at the cost of
731 requiring both directions being enabled for TFO, and TFO never being used
732 by non-daemon-related Exim processes.
734 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
735 endings, at least on the first header line. Try to canonify any that get
736 past that check, despite the cost.
738 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
739 now limited to an arbitrary five deep, while parsing addresses with the
740 strip_excess_angle_brackets option enabled.
742 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
743 instead leave the unprompted TLS handshake in socket buffer for the
744 TLS library to consume.
746 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
748 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
750 JH/16 Drop variables when they go out of scope. Memory management drops a whole
751 region in one operation, for speed, and this leaves assigned pointers
752 dangling. Add checks run only under the testsuite which checks all
753 variables at a store-reset and panics on a dangling pointer; add code
754 explicitly nulling out all the variables discovered. Fixes one known
755 bug: a transport crash, where a dangling pointer for $sending_ip_address
756 originally assigned in a verify callout, is re-used.
758 PP/06 Drop '.' from @INC in various Perl scripts.
760 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
762 PP/08 Reduce a number of compilation warnings under clang; building with
763 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
764 should be warning-free.
766 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
768 HS/01 Fix portability problems introduced by PP/08 for platforms where
769 realloc(NULL) is not equivalent to malloc() [SunOS et al].
771 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
772 chunk. This allows us to accept broken chunked messages. We need a more
773 general solution here.
775 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
776 already-broken messages in the queue.
778 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
780 JH/19 Fix reference counting bug in routing-generated-address tracking.
786 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
787 supports it and a size is available (ie. the sending peer gave us one).
789 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
790 years of being deprecated). The replacements are the ACLs
791 acl_smtp_mime and acl_not_smtp_mime.
793 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
794 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
795 or even an in-clear connection were permitted. Now, if the host lookup
796 was dnssec and dane was requested then the host is only used if the
797 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
798 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
799 if one fails this test.
800 This means that a poorly-configured remote DNS will make it incommunicado;
801 but it protects against a DNS-interception attack on it.
803 JH/04 Bug 1810: make continued-use of an open smtp transport connection
804 non-noisy when a race steals the message being considered.
806 JH/05 If main configuration option tls_certificate is unset, generate a
807 self-signed certificate for inbound TLS connections.
809 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
810 in rewrites and routers.
812 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
813 and logged a warning sing 4.83; now they are a configuration file error.
815 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
816 (lacking @domain). Apply the same qualification processing as RCPT.
818 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
820 JH/10 Support ${sha256:} applied to a string (as well as the previous
823 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
824 a cutthrough deliver is pending, as we always want to make a connection.
825 This also avoids re-routing the message when later placing the cutthrough
826 connection after a verify cache hit.
827 Do not update it with the verify result either.
829 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
830 when routing results in more than one destination address.
832 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
833 signing (which inhibits the cutthrough capability). Previously only
834 the presence of an option was tested; now an expansion evaluating as
835 empty is permissible (obviously it should depend only on data available
836 when the cutthrough connection is made).
838 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
839 the relevant preceding SMTP command did not note the pipelining mode.
841 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
842 Previously they were not counted.
844 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
845 as one having no matching records. Previously we deferred the message
846 that needed the lookup.
848 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
849 distinguished as "(=".
851 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
852 for missing MX records. Previously it only worked for missing A records.
854 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
856 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
857 after the data-go-ahead and data-ack. Patch from Jason Betts.
859 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
860 even for a "none" policy. Patch from Tony Meyer.
862 JH/22 Fix continued use of a connection for further deliveries. If a port was
863 specified by a router, it must also match for the delivery to be
866 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
867 When one of the recipients of a message was unsuitable for the connection
868 (has no matching addresses), we lost track of needing to mark it
869 deferred. As a result mail would be lost.
871 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
873 JH/25 Decoding ACL controls is now done using a binary search; the source code
874 takes up less space and should be simpler to maintain. Merge the ACL
875 condition decode tables also, with similar effect.
877 JH/26 Fix problem with one_time used on a redirect router which returned the
878 parent address unchanged. A retry would see the parent address marked as
879 delivered, so not attempt the (identical) child. As a result mail would
882 JH/27 Fix a possible security hole, wherein a process operating with the Exim
883 UID can gain a root shell. Credit to http://www.halfdog.net/ for
884 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
887 JH/28 Enable {spool,log} filesystem space and inode checks as default.
888 Main config options check_{log,spool}_{inodes,space} are now
889 100 inodes, 10MB unless set otherwise in the configuration.
891 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
892 Previously it only applied to the main-section connection policy
895 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
897 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
898 by me. Added RFC7919 DH primes as an alternative.
900 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
901 are not in the system include path.
903 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
904 GnuTLS, when a session startup failed (eg because the client disconnected)
905 Exim did stdio operations after fclose. This was exposed by a recent
906 change which nulled out the file handle after the fclose.
908 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
909 signed directly by the cert-signing cert, rather than an intermediate
910 OCSP-signing cert. This is the model used by LetsEncrypt.
912 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
914 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
915 an incoming connection.
917 HS/02 Bug 1802: Do not half-close the connection after sending a request
920 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
921 fallback to "prime256v1".
923 JH/34 SECURITY: Use proper copy of DATA command in error message.
924 Could leak key material. Remotely exploitable. CVE-2016-9963.
930 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
931 and 3.4.4 - once the server is enabled to respond to an OCSP request
932 it does even when not requested, resulting in a stapling non-aware
933 client dropping the TLS connection.
935 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
936 support variable-length bit vectors. No functional change.
938 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
939 The I= interface field on outgoing lines is now after the H= remote
940 host field, same as incoming lines. There is a separate
941 outgoing_interface log selector which allows you to disable the
944 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
945 If not running log_selector +smtp_connection the mainlog would be held
946 open indefinitely after a "too many connections" event, including to a
947 deleted file after a log rotate. Leave the per net connection logging
948 leaving it open for efficiency as that will be quickly detected by the
949 check on the next write.
951 HS/01 Bug 1671: Fix post transport crash.
952 Processing the wait-<transport> messages could crash the delivery
953 process if the message IDs didn't exist for some reason. When
954 using 'split_spool_directory=yes' the construction of the spool
955 file name failed already, exposing the same netto behaviour.
957 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
958 mime_regex ACL conditions.
960 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
961 to DSN fail messages (bounces): remote IP, remote greeting, remote response
962 to HELO, local diagnostic string.
964 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
965 log line to debug. Even when configured with a tls authenticator many
966 client connections are expected to not authenticate in this way, so
967 an authenticate fail is not an error.
969 HS/02 Add the Exim version string to the process info. This way exiwhat
970 gives some more detail about the running daemon.
972 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
973 matter for fast-change records such as DNSBLs.
975 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
976 retry record, even if constant. There may be multiple transports with
977 different interface settings and the retry behaviour needs to be kept
980 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
982 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
984 JH/10 Bug 840: fix log_defer_output option of pipe transport
986 JH/11 Bug 830: use same host for all RCPTS of a message, even under
987 hosts_randomize. This matters a lot when combined with mua_wrapper.
989 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
990 ${quote_pgsql:<string>} operator.
992 JH/13 Bug 1708: avoid misaligned access in cached lookup.
994 JH/14 Change header file name for freeradius-client. Relevant if compiling
995 with Radius support; from the Gentoo tree and checked under Fedora.
997 JH/15 Bug 1712: Introduce $prdr_requested flag variable
999 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1000 option transport_filter, meaning no filtering.
1002 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1004 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1005 defaults to "*" (all hosts). The variable is now available when not built
1006 with TLS, default unset, mainly to enable keeping the testsuite sane.
1007 If a server certificate is not supplied (via tls_certificate) an error is
1008 logged, and clients will find TLS connections fail on startup. Presumably
1009 they will retry in-clear.
1010 Packagers of Exim are strongly encouraged to create a server certificate
1011 at installation time.
1013 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1014 with the $config_file variable.
1016 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1017 in transport context, after the attempt, and per-recipient. The latter type
1018 is per host attempted. The event data is the error message, and the errno
1019 information encodes the lookup type (A vs. MX) used for the (first) host,
1020 and the trailing two digits of the smtp 4xx response.
1022 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1023 to write to mainlog (or rejectlog, paniclog) in the window between file
1024 creation and permissions/ownership being changed. Particularly affects
1025 installations where exicyclog is run as root, rather than exim user;
1026 result is that the running daemon panics and dies.
1028 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1030 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1031 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1032 "pri" and "weight". Note that the previous implicit priority given by the
1033 list order is no longer honoured.
1035 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1036 for DKIM processing.
1038 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1039 by defining SUPPORT_SOCKS.
1041 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1042 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1043 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1044 variables are renamed to proxy_{local,external}_{address,port}.
1046 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1047 for a build by defining SUPPORT_I18N
1049 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1050 of the query string, and make ${quote_redis:} do that quoting.
1052 JH/29 Move Events support from Experimental to mainline, enabled by default
1053 and removable for a build by defining DISABLE_EVENT.
1055 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1057 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1058 cached by the daemon.
1060 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1061 by defining LOOKUP_REDIS. The libhiredis library is required.
1063 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1064 keys are given for lookup.
1066 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1067 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1068 only supported when built with TLS support. The PolarSSL SHA routines
1069 are still used when the TLS library is too old for convenient support.
1071 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1072 openssl_options), for security. OpenSSL forces this from version 1.1.0
1073 server-side so match that on older versions.
1075 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1076 allocation for $value could be released as the expansion processing
1077 concluded, but leaving the global pointer active for it.
1079 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1080 and to use the domains and local_parts ACL conditions.
1082 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1083 incorrectly not doubled on cutthrough transmission, hence seen as a
1084 body-termination at the receiving system - resulting in truncated mails.
1085 Commonly the sender saw a TCP-level error, and retransmitted the message
1086 via the normal store-and-forward channel. This could result in duplicates
1087 received - but deduplicating mailstores were liable to retain only the
1088 initial truncated version.
1090 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1092 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1094 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1095 we're in there, support oversigning also; bug 1309.
1097 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1099 HS/04 Add support for keep_environment and add_environment options.
1101 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1102 either intentional arithmetic overflow during PRNG, or testing config-
1105 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1106 delivery resulted in actual delivery. Cancel cutthrough before DATA
1109 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1110 rejects a recipient: pass the reject to the originator.
1112 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1113 Many were false-positives and ignorable, but it's worth fixing the
1116 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1117 for the new environment-manipulation done at startup. Move the routines
1118 from being local to tls.c to being global via the os.c file.
1120 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1121 an extract embedded as result-arg for a map, the first arg for extract
1122 is unavailable so we cannot tell if this is a numbered or keyed
1123 extraction. Accept either.
1129 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1132 JH/02 The smtp transport option "multi_domain" is now expanded.
1134 JH/03 The smtp transport now requests PRDR by default, if the server offers
1137 JH/04 Certificate name checking on server certificates, when exim is a client,
1138 is now done by default. The transport option tls_verify_cert_hostnames
1139 can be used to disable this per-host. The build option
1140 EXPERIMENTAL_CERTNAMES is withdrawn.
1142 JH/05 The value of the tls_verify_certificates smtp transport and main options
1143 default to the word "system" to access the system default CA bundle.
1144 For GnuTLS, only version 3.0.20 or later.
1146 JH/06 Verification of the server certificate for a TLS connection is now tried
1147 (but not required) by default. The verification status is now logged by
1148 default, for both outbound TLS and client-certificate supplying inbound
1151 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1154 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1155 Status Notification (bounce) messages are now MIME format per RFC 3464.
1156 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1157 under the control of the dsn_advertise_hosts option, and routers may
1158 have a dsn_lasthop option.
1160 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1161 default, modifiable by a malware= option. The list separator for
1162 the options can now be changed in the usual way. Bug 68.
1164 JH/10 The smtp_receive_timeout main option is now expanded before use.
1166 JH/11 The incoming_interface log option now also enables logging of the
1167 local interface on delivery outgoing connections.
1169 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1170 if the interface and destination host and port all match.
1172 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1175 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1176 Patch from Andrew Lewis.
1178 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1179 now supports optional time-restrictions, weighting, and priority
1180 modifiers per server. Patch originally by <rommer@active.by>.
1182 JH/16 The spamd_address main option now supports a mixed list of local
1183 and remote servers. Remote servers can be IPv6 addresses, and
1184 specify a port-range.
1186 JH/17 Bug 68: The spamd_address main option now supports an optional
1187 timeout value per server.
1189 JH/18 Bug 1581: Router and transport options headers_add/remove can
1190 now have the list separator specified.
1192 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1195 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1198 JH/21 Support for the A6 type of dns record is withdrawn.
1200 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1201 rather than the verbs used.
1203 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1204 from 255 to 1024 chars.
1206 JH/24 Verification callouts now attempt to use TLS by default.
1208 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1209 are generic router options now. The defaults didn't change.
1211 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1212 Original patch from Alexander Shikoff, worked over by JH.
1214 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1215 files if ZCAT_COMMAND is not executable.
1217 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1219 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1221 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1222 Normally benign, it bites when the pair was led to by a CNAME;
1223 modern usage is to not canonicalize the domain to a CNAME target
1224 (and we were inconsistent anyway for A-only vs AAAA+A).
1226 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1228 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1229 when evaluating $sender_host_dnssec.
1231 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1232 $sender_helo_dnssec variable.
1234 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1236 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1238 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1240 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1241 documented as working, but never had. Support all but $spam_report.
1243 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1244 added for tls authenticator.
1246 HS/03 Add perl_taintmode main config option
1252 TL/01 When running the test suite, the README says that variables such as
1253 no_msglog_check are global and can be placed anywhere in a specific
1254 test's script, however it was observed that placement needed to be near
1255 the beginning for it to behave that way. Changed the runtest perl
1256 script to read through the entire script once to detect and set these
1257 variables, reset to the beginning of the script, and then run through
1258 the script parsing/test process like normal.
1260 TL/02 The BSD's have an arc4random API. One of the functions to induce
1261 adding randomness was arc4random_stir(), but it has been removed in
1262 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1263 function when detected.
1265 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1266 cause callback expansion.
1268 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1269 syntax errors in an expansion can be treated as a string instead of
1270 logging or causing an error, due to the internal use of bool_lax
1271 instead of bool when processing it.
1273 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1274 server certificates when making smtp deliveries.
1276 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1278 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1280 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1282 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1283 Merged patch from Sebastian Wiedenroth.
1285 JH/05 Fix results-pipe from transport process. Several recipients, combined
1286 with certificate use, exposed issues where response data items split
1287 over buffer boundaries were not parsed properly. This eventually
1288 resulted in duplicates being sent. This issue only became common enough
1289 to notice due to the introduction of connection certificate information,
1290 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1292 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1293 size buffer was used, resulting in syntax errors when an expansion
1296 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1297 version 3.3.6 or later.
1299 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1300 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1301 both become "event_action", the variables become $event_name, $event_data
1302 and $event_defer_errno. There is a new variable $verify_mode, usable in
1303 routers, transports and related events. The tls:cert event is now also
1304 raised for inbound connections, if the main configuration event_action
1307 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1308 early OCSP support, but no stapling (appears to be less than 1.0.0).
1310 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1311 server certificate names available under the smtp transport option
1312 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1315 JH/10 Time-related extraction expansions from certificates now use the main
1316 option "timezone" setting for output formatting, and are consistent
1317 between OpenSSL and GnuTLS compilations. Bug 1541.
1319 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1320 encoded parameter in the incoming message. Bug 1558.
1322 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1323 include certificate info, eximon was claiming there were spoolfile
1326 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1328 JH/14 Log delivery-related information more consistently, using the sequence
1329 "H=<name> [<ip>]" wherever possible.
1331 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1332 are problematic for Debian distribution, omit them from the release
1335 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1337 JH/16 Fix string representation of time values on 64bit time_t architectures.
1340 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1341 output list separator was used.
1346 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1347 checkers that were complaining about end of non-void function with no
1350 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1351 This was a regression introduced in 4.83 by another bugfix.
1353 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1355 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1356 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1362 TF/01 Correctly close the server side of TLS when forking for delivery.
1364 When a message was received over SMTP with TLS, Exim failed to clear up
1365 the incoming connection properly after forking off the child process to
1366 deliver the message. In some situations the subsequent outgoing
1367 delivery connection happened to have the same fd number as the incoming
1368 connection previously had. Exim would try to use TLS and fail, logging
1369 a "Bad file descriptor" error.
1371 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1372 utilities have not been installed.
1374 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1375 temporary space as the ACL may create new global variables.
1377 TL/01 LDAP support uses per connection or global context settings, depending
1378 upon the detected version of the libraries at build time.
1380 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1381 to extract and use the src ip:port in logging and expansions as if it
1382 were a direct connection from the outside internet. PPv2 support was
1383 updated based on HAProxy spec change in May 2014.
1385 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1387 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1388 Properly escape header and check for NULL return.
1390 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1393 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1395 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1396 characters in header names, implemented as a verify condition.
1397 Contributed by Michael Fischer v. Mollard.
1399 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1400 results permerror and temperror. Previous values are deprecated but
1401 still accepted. In a future release, err_perm and err_temp will be
1402 completely removed, which will be a backward incompatibility if the
1403 ACL tests for either of these two old results. Patch contributed by
1404 user bes-internal on the mailing list.
1406 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1408 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1409 selectors, in both main and reject logs.
1411 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1414 JH/07 Add malware type "sock" for talking to simple daemon.
1416 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1418 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1419 routers/transports under cutthrough routing.
1421 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1422 numbers. Touch up "bool" conditional to keep the same definition.
1424 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1426 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1428 JH/12 Expand items in router/transport headers_add or headers_remove lists
1429 individually rather than the list as a whole. Bug 1452.
1431 Required for reasonable handling of multiple headers_ options when
1432 they may be empty; requires that headers_remove items with embedded
1433 colons must have them doubled (or the list-separator changed).
1435 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1436 view the policy declared in the DMARC record. Currently, $dmarc_status
1437 is a combined value of both the record presence and the result of the
1440 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1442 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1443 dnslookup router and the smtp transport (applying to the forward
1446 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1447 of ldap servers used for a specific lookup. Patch provided by Heiko
1450 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1451 New variable $lookup_dnssec_authenticated for observability.
1453 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1454 Patch submitted by Lars Timman.
1456 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1458 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1459 Requires trusted mode and valid format message id, aborts otherwise.
1460 Patch contributed by Heiko Schlichting.
1462 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1463 certextract with support for various fields. Bug 1358.
1465 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1466 is requested by default, modifiable by smtp transport option
1469 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1470 operate on certificate variables to give certificate fingerprints
1471 Also new ${sha256:cert_variable}.
1473 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1475 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1476 Christian Aistleitner.
1478 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1480 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1481 file. Patch from Wolfgang Breyha.
1483 JH/25 Expand the coverage of the delivery $host and $host_address to
1484 client authenticators run in verify callout. Bug 1476.
1486 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1487 align with daemon_smtp_ports. Bug 72.
1489 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1490 support and error reporting did not work properly.
1492 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1493 and is readable. Patch from Andrew Colin Kissa.
1495 TL/14 Enhance documentation of ${run expansion and how it parses the
1496 commandline after expansion, particularly in the case when an
1497 unquoted variable expansion results in an empty value.
1499 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1501 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1502 by renaming away from it. Addresses GH issue 15, reported by
1505 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1507 TL/15 SECURITY: prevent double expansion in math comparison functions
1508 (can expand unsanitized data). Not remotely exploitable.
1515 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1517 PP/02 Make -n do something, by making it not do something.
1518 When combined with -bP, the name of an option is not output.
1520 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1523 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1524 $sender_host_name and config options to manage this, and basic check
1527 PP/05 DSCP support for outbound connections and control modifier for inbound.
1529 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1530 (Only plugin which currently uses this is kerberos4, which nobody should
1531 be using, but we should make it available and other future plugins might
1532 conceivably use it, even though it would break NAT; stuff *should* be
1533 using channel bindings instead).
1535 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1536 name; added for Sendmail compatibility; requires admin caller.
1537 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1538 just ignore it); requires trusted caller.
1539 Also parse but ignore: -Ac -Am -X<logfile>
1542 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1544 TL/02 Add +smtp_confirmation as a default logging option.
1546 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1547 Patch by Magnus Holmgren from 2007-02-20.
1549 TL/04 Bugzilla 1281 - Spec typo.
1550 Bugzilla 1283 - Spec typo.
1551 Bugzilla 1290 - Spec grammar fixes.
1553 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1555 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1557 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1558 mailing list by by Dmitry Isaikin.
1560 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1562 JH/02 Support "G" suffix to numbers in ${if comparisons.
1564 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1566 NM/01 Bugzilla 1197 - Spec typo
1567 Bugzilla 1196 - Spec examples corrections
1569 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1571 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1572 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1575 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1576 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1578 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1579 "acl {{name}{arg}...}", and optional args on acl condition
1582 JH/05 Permit multiple router/transport headers_add/remove lines.
1584 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1586 JH/07 Avoid using a waiting database for a single-message-only transport.
1587 Performance patch from Paul Fisher. Bugzilla 1262.
1589 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1592 JH/09 Add $headers_added variable, with content from use of ACL modifier
1593 add_header (but not yet added to the message). Bugzilla 199.
1595 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1596 Pulled from Bugzilla 817 by Wolfgang Breyha.
1598 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1600 (nb: this is the same fix as in Exim 4.80.1)
1602 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1605 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1608 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1610 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1611 advertise SMTP AUTH mechanism to us, instead of a generic
1612 protocol violation error. Also, make Exim more robust to bad
1613 data from the Dovecot auth socket.
1615 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1617 When a queue runner is handling a message, Exim first routes the
1618 recipient addresses, during which it prunes them based on the retry
1619 hints database. After that it attempts to deliver the message to
1620 any remaining recipients. It then updates the hints database using
1623 So if a recipient address works intermittently, it can get repeatedly
1624 deferred at routing time. The retry hints record remains fresh so the
1625 address never reaches the final cutoff time.
1627 This is a fairly common occurrence when a user is bumping up against
1628 their storage quota. Exim had some logic in its local delivery code
1629 to deal with this. However it did not apply to per-recipient defers
1630 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1632 This change adds a proper retry rule check during routing so that the
1633 final cutoff time is checked against the message's age. We only do
1634 this check if there is an address retry record and there is not a
1635 domain retry record; this implies that previous attempts to handle
1636 the address had the retry_use_local_parts option turned on. We use
1637 this as an approximation for the destination being like a local
1638 delivery, as in LMTP.
1640 I suspect this new check makes the old local delivery cutoff check
1641 redundant, but I have not verified this so I left the code in place.
1643 TF/02 Correct gecos expansion when From: is a prefix of the username.
1645 Test 0254 submits a message to Exim with the header
1649 When I ran the test suite under the user fanf2, Exim expanded
1650 the header to contain my full name, whereas it should have added
1651 a Resent-Sender: header. It erroneously treats any prefix of the
1652 username as equal to the username.
1654 This change corrects that bug.
1656 GF/01 DCC debug and logging tidyup
1657 Error conditions log to paniclog rather than rejectlog.
1658 Debug lines prefixed by "DCC: " to remove any ambiguity.
1660 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1662 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1663 Bug spotted by Jeremy Harris; was flawed since initial commit.
1664 Would have resulted in OCSP responses post-SNI triggering an Exim
1665 NULL dereference and crash.
1667 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1669 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1670 Bug detection, analysis and fix by Samuel Thibault.
1671 Bugzilla 1331, Debian bug #698092.
1673 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1675 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1676 Server implementation by Todd Lyons, client by JH.
1677 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1678 config variable "prdr_enable" controls whether the server
1679 advertises the facility. If the client requests PRDR a new
1680 acl_data_smtp_prdr ACL is called once for each recipient, after
1681 the body content is received and before the acl_smtp_data ACL.
1682 The client is controlled by both of: a hosts_try_prdr option
1683 on the smtp transport, and the server advertisement.
1684 Default client logging of deliveries and rejections involving
1685 PRDR are flagged with the string "PRDR".
1687 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1688 fclose(). Diagnosis by Todd Lyons.
1690 PP/17 Update configure.default to handle IPv6 localhost better.
1691 Patch by Alain Williams (plus minor tweaks).
1694 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1695 This is now consistent with GnuTLS, and is now documented: the
1696 previous undocumented portable approach to treating the option as
1697 unset was to force an expansion failure. That still works, and
1698 an empty string is now equivalent.
1700 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1701 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1702 not performing validation itself.
1704 PP/20 Added force_command boolean option to pipe transport.
1705 Patch from Nick Koston, of cPanel Inc.
1707 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1710 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1712 PP/21 Fix eximon continuous updating with timestamped log-files.
1713 Broken in a format-string cleanup in 4.80, missed when I repaired the
1714 other false fix of the same issue.
1715 Report and fix from Heiko Schlichting.
1718 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1719 Report from Prashanth Katuri.
1721 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1722 It's SecureTransport, so affects any MacOS clients which use the
1723 system-integrated TLS libraries, including email clients.
1725 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1726 using a MIME ACL for non-SMTP local injection.
1727 Report and assistance in diagnosis by Warren Baker.
1729 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1731 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1733 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1734 last id that failed so it may be referenced in subsequent ACL's.
1736 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1739 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1740 ldap library initialization, allowing self-signed CA's to be
1741 used. Also properly sets require_cert option later in code by
1742 using NULL (global ldap config) instead of ldap handle (per
1743 session). Bug diagnosis and testing by alxgomz.
1745 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1746 the src/util/ subdirectory.
1748 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1749 renamed to Transport Post Delivery Action by Jeremy Harris, as
1752 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1753 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1754 redis_servers = needs to be configured which will be used by the redis
1755 lookup. Patch from Warren Baker, of The Packet Hub.
1757 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1759 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1760 hostname or reverse DNS when processing a host list. Used suggestions
1761 from multiple comments on this bug.
1763 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1765 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1766 Missed a few lines, added it to make the runtest require no keyboard
1769 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1770 contains upper case chars. Make router use caseful_local_part.
1772 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1773 support when GnuTLS has been built with p11-kit.
1779 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1781 This, or similar/improved, will also be change PP/11 of 4.82.
1787 PP/01 Handle short writes when writing local log-files.
1788 In practice, only affects FreeBSD (8 onwards).
1789 Bugzilla 1053, with thanks to Dmitry Isaikin.
1791 NM/01 Bugzilla 949 - Documentation tweak
1793 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1796 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1798 PP/02 Implemented gsasl authenticator.
1800 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1802 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1803 `pkg-config foo` for cflags/libs.
1805 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1806 with rest of GSASL and with heimdal_gssapi.
1808 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1809 `pkg-config foo` for cflags/libs for the TLS implementation.
1811 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1812 properties get this fed in as external SSF. A number of robustness
1813 and debugging improvements to the cyrus_sasl authenticator.
1815 PP/08 cyrus_sasl server now expands the server_realm option.
1817 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1818 Patch by Jeremy Harris.
1820 PP/10 Added dbmjz lookup type.
1822 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1824 PP/12 MAIL args handles TAB as well as SP, for better interop with
1825 non-compliant senders.
1826 Analysis and variant patch by Todd Lyons.
1828 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1829 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1830 Patch from Dirk Mueller <dmueller@suse.com>
1832 PP/13 tls_peerdn now print-escaped for spool files.
1833 Observed some $tls_peerdn in wild which contained \n, which resulted
1834 in spool file corruption.
1836 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1837 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1838 or write after TLS renegotiation, which otherwise led to messages
1841 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1842 as a tracking header (ie: a signed header comes before the signature).
1843 Patch from Wolfgang Breyha.
1845 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1846 comma-sep list; embedded commas doubled.
1848 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1850 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1852 Report and patch from Dmitry Banschikov.
1854 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1855 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1856 failures. We appear to now support TLS1.1+ with Exim.
1858 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1859 lets Exim select keys and certificates based upon TLS SNI from client.
1860 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1861 before an outbound SMTP session. New log_selector, +tls_sni.
1863 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1864 NULL dereference. Report and patch from Alun Jones.
1866 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1867 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1868 Not seeing resolver debug output on NetBSD, but suspect this is a
1869 resolver implementation change.
1871 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1872 Left warnings. Added "eximon gdb" invocation mode.
1874 PP/21 Defaulting "accept_8bitmime" to true, not false.
1876 PP/22 Added -bw for inetd wait mode support.
1878 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1879 locate the relevant includes and libraries. Made this the default.
1881 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1882 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1884 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1885 This may cause build issues on older platforms.
1887 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1888 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1889 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1890 Added SNI support via GnuTLS too.
1891 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1893 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1895 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1896 Applied second patch from Janne, implementing suggestion to default
1897 multiple-strings-in-record handling to match SPF spec.
1899 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1901 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1902 read-only, out of scope).
1903 Patch from Wolfgang Breyha, report from Stuart Northfield.
1905 PP/29 Fix three issues highlighted by clang analyser static analysis.
1906 Only crash-plausible issue would require the Cambridge-specific
1907 iplookup router and a misconfiguration.
1908 Report from Marcin Mirosław.
1910 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1912 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1913 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1914 As part of this, removing so much warning spew let me fix some minor
1915 real issues in debug logging.
1917 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1918 assignment on my part. Fixed.
1920 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1921 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1922 Janne Snabb (who went above and beyond: thank you).
1924 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1925 string otherwise requires a connection and a bunch more work and it's
1926 relatively easy to get wrong. Should also expose TLS library linkage
1929 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1930 64-bit ${eval} (JH/03).
1932 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1933 GNU libc to support some of the 64-bit stuff, should not lead to
1934 conflicts. Defined before os.h is pulled in, so if a given platform
1935 needs to override this, it can.
1937 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1938 protection layer was required, which is not implemented.
1939 Bugzilla 1254, patch from Wolfgang Breyha.
1941 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1942 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1943 tls_dhparam take prime identifiers. Also unbreak combination of
1944 OpenSSL+DH_params+TLSSNI.
1946 PP/39 Disable SSLv2 by default in OpenSSL support.
1952 PP/01 Solaris build fix for Oracle's LDAP libraries.
1953 Bugzilla 1109, patch from Stephen Usher.
1955 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1957 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1960 TF/02 Fix a couple more cases where we did not log the error message
1961 when unlink() failed. See also change 4.74-TF/03.
1963 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1964 lock up or crash if it happened to be inside a call to libc when it
1965 got a SIGUSR1 from exiwhat.
1967 The SIGUSR1 handler appends the current process status to the process
1968 log which is later printed by exiwhat. It used to use the general
1969 purpose logging code to do this, but several functions it calls are
1970 not safe for signals.
1972 The new output code in the SIGUSR1 handler is specific to the process
1973 log, and simple enough that it's easy to inspect for signal safety.
1974 Removing some special cases also simplifies the general logging code.
1975 Removing the spurious timestamps from the process log simplifies
1978 TF/04 Improved ratelimit ACL condition.
1980 The /noupdate option has been deprecated in favour of /readonly which
1981 has clearer semantics. The /leaky, /strict, and /readonly update modes
1982 are mutually exclusive. The update mode is no longer included in the
1983 database key; it just determines when the database is updated. (This
1984 means that when you upgrade Exim will forget old rate measurements.)
1986 Exim now checks that the per_* options are used with an update mode that
1987 makes sense for the current ACL. For example, when Exim is processing a
1988 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1989 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1990 must specify per_mail/readonly. If you omit the update mode it defaults to
1991 /leaky where that makes sense (as before) or /readonly where required.
1993 The /noupdate option is now undocumented but still supported for
1994 backwards compatibility. It is equivalent to /readonly except that in
1995 ACLs where /readonly is required you may specify /leaky/noupdate or
1996 /strict/noupdate which are treated the same as /readonly.
1998 A useful new feature is the /count= option. This is a generalization
1999 of the per_byte option, so that you can measure the throughput of other
2000 aggregate values. For example, the per_byte option is now equivalent
2001 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2003 The per_rcpt option has been generalized using the /count= mechanism
2004 (though it's more complicated than the per_byte equivalence). When it is
2005 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2006 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2007 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2008 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2009 Note that using per_rcpt with a non-readonly update mode in more than
2010 one ACL will cause the recipients to be double-counted. (The per_mail
2011 and per_byte options don't have this problem.)
2013 The handling of very low rates has changed slightly. If the computed rate
2014 is less than the event's count (usually one) then this event is the first
2015 after a long gap. In this case the rate is set to the same as this event's
2016 count, so that the first message of a spam run is counted properly.
2018 The major new feature is a mechanism for counting the rate of unique
2019 events. The new per_addr option counts the number of different
2020 recipients that someone has sent messages to in the last time period. It
2021 behaves like per_rcpt if all the recipient addresses are different, but
2022 duplicate recipient addresses do not increase the measured rate. Like
2023 the /count= option this is a general mechanism, so the per_addr option
2024 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2025 example, measure the rate that a client uses different sender addresses
2026 with the options per_mail/unique=$sender_address. There are further
2027 details in the main documentation.
2029 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2031 TF/06 Removed a few PCRE remnants.
2033 TF/07 Automatically extract Exim's version number from tags in the git
2034 repository when doing development or release builds.
2036 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2037 Bugzilla 879. Patch from Paul Fisher.
2039 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2040 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2043 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2045 PP/05 Variable $av_failed, true if the AV scanner deferred.
2046 Bugzilla 1078. Patch from John Horne.
2048 PP/06 Stop make process more reliably on build failure.
2049 Bugzilla 1087. Patch from Heiko Schlittermann.
2051 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2052 Bugzilla 1089. Patch from Heiko Schlittermann.
2054 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2055 Bugzilla 1131. Patch from Holger Weiß.
2057 PP/09 Handle IPv6 addresses with SPF.
2058 Bugzilla 860. Patch from Wolfgang Breyha.
2060 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2062 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2065 PP/11 match_* no longer expand right-hand-side by default.
2066 New compile-time build option, EXPAND_LISTMATCH_RHS.
2067 New expansion conditions, "inlist", "inlisti".
2069 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2071 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2073 PP/14 fix log_write() format string regression from TF/03.
2074 Bugzilla 1152. Patch from Dmitry Isaikin.
2080 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2082 PP/02 Harmonised TLS library version reporting; only show if debugging.
2083 Layout now matches that introduced for other libraries in 4.74 PP/03.
2085 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2087 PP/04 New "dns_use_edns0" global option.
2089 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2092 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2093 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2095 TK/01 Updated PolarSSL code to 0.14.2.
2096 Bugzilla 1097. Patch from Andreas Metzler.
2098 PP/07 Catch divide-by-zero in ${eval:...}.
2099 Fixes bugzilla 1102.
2101 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2104 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2105 format-string attack -- SECURITY: remote arbitrary code execution.
2107 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2108 time unintentionally subject to list matching rules, letting the header
2109 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2110 arbitrary string expansion). This allowed for information disclosure.
2112 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2113 INT_MIN/-1 -- value coerced to INT_MAX.
2119 NM/01 Workaround for PCRE version dependency in version reporting
2122 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2123 This fixes portability to compilers other than gcc, notably
2124 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2126 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2127 makefiles for portability to HP-UX and POSIX correctness.
2129 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2130 Also via indented variable definition in the Makefile.
2131 (Debugging by Oliver Heesakkers).
2133 PP/02 Restore caching of spamd results with expanded spamd_address.
2134 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2136 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2137 Improves build reliability. Fix from: Frank Elsner
2139 NM/02 Fix wide character breakage in the rfc2047 coding
2140 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2142 NM/03 Allow underscore in dnslist lookups
2143 Fixes bug 1026. Patch from Graeme Fowler
2145 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2146 Code patches from Adam Ciarcinski of NetBSD.
2148 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2151 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2152 is logged, to avoid truncation. Patch from John Horne.
2154 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2155 Patch from Jakob Hirsch.
2157 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2158 SQL string expansion failure details.
2159 Patch from Andrey Oktyabrski.
2161 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2162 Patch from Simon Arlott.
2164 PP/09 New lookups functionality failed to compile on old gcc which rejects
2165 extern declarations in function scope.
2166 Patch from Oliver Fleischmann
2168 PP/10 Use sig_atomic_t for flags set from signal handlers.
2169 Check getgroups() return and improve debugging.
2170 Fixed developed for diagnosis in bug 927 (which turned out to be
2173 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2174 Patch from Mark Zealey.
2176 PP/12 Bugzilla 1056: Improved spamd server selection.
2177 Patch from Mark Zealey.
2179 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2180 Based on patch from Heiko Schlittermann.
2182 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2183 Patch from Uwe Doering, sign-off by Michael Haardt.
2185 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2186 variable declaration deep within a block. Bug and patch from
2189 PP/15 lookups-Makefile IRIX compatibility coercion.
2191 PP/16 Make DISABLE_DKIM build knob functional.
2193 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2194 Patch by Simon Arlott
2196 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2197 variable argument macros. Our copy now differs from upstream.
2203 TF/01 Failure to get a lock on a hints database can have serious
2204 consequences so log it to the panic log.
2206 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2207 controlled using the smtp_confirmation log selector.
2209 TF/03 Include the error message when we fail to unlink a spool file.
2211 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2212 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2213 for maintaining out-of-tree patches for some time.
2215 PP/01 Bugzilla 139: Documentation and portability issues.
2216 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2217 Handle per-OS dynamic-module compilation flags.
2219 PP/02 Let /dev/null have normal permissions.
2220 The 4.73 fixes were a little too stringent and complained about the
2221 permissions on /dev/null. Exempt it from some checks.
2222 Reported by Andreas M. Kirchwitz.
2224 PP/03 Report version information for many libraries, including
2225 Exim version information for dynamically loaded libraries. Created
2226 version.h, now support a version extension string for distributors
2227 who patch heavily. Dynamic module ABI change.
2229 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2230 privilege escalation vulnerability whereby the Exim run-time user
2231 can cause root to append content of the attacker's choosing to
2234 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2237 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2238 If dropping privileges for untrusted macros, we disabled normal logging
2239 on the basis that it would fail; for the Exim run-time user, this is not
2240 the case, and it resulted in successful deliveries going unlogged.
2241 Fixed. Reported by Andreas Metzler.
2247 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2248 only prepend for the Resent-* case. Fixes regression introduced in
2249 Exim 4.70 by NM/22 for Bugzilla 607.
2251 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2252 increasing numbers of administrators be bitten by this.
2254 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2256 PP/03 Bugzilla 994: added openssl_options main configuration option.
2258 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2260 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2262 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2264 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2265 without a peer certificate, leading to a segfault because of an
2266 assumption that peers always have certificates. Be a little more
2267 paranoid. Problem reported by Martin Tscholak.
2269 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2270 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2271 NB: ClamAV planning to remove STREAM in "middle of 2010".
2272 CL also introduces -bmalware, various -d+acl logging additions and
2273 more caution in buffer sizes.
2275 PP/09 Implemented reverse_ip expansion operator.
2277 PP/10 Bugzilla 937: provide a "debug" ACL control.
2279 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2281 PP/12 Bugzilla 973: Implement --version.
2283 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2285 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2287 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2289 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2290 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2291 ignore trailing whitespace.
2293 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2295 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2298 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2299 Notification from Dr Andrew Aitchison.
2301 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2302 ExtendedDetectionInfo response format.
2303 Notification from John Horne.
2305 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2308 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2309 XSL and documented dependency on system catalogs, with examples of how
2312 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2315 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2316 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2317 configuration file which is writeable by the Exim user or group.
2319 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2320 of configuration files to cover files specified with the -C option if
2321 they are going to be used with root privileges, not just the default
2324 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2325 option (effectively making it always true).
2327 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2328 files to be used while preserving root privileges.
2330 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2331 that rogue child processes cannot use them.
2333 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2334 run-time user, instead of root.
2336 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2337 Exim run-time user without dropping privileges.
2339 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2340 result string, instead of calling string_vformat() twice with the same
2343 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2344 for other users. Others should always drop root privileges if they use
2345 -C on the command line, even for a whitelisted configure file.
2347 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2349 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2355 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2356 $data_path, and $header_path variables; fixed documentation bugs and
2359 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2360 exipick to access non-standard spools, including the "frozen" queue
2363 NM/01 Bugzilla 965: Support mysql stored procedures.
2364 Patch from Alain Williams
2366 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2368 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2369 Patch from Andreas Metzler
2371 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2372 Patch from Kirill Miazine
2374 NM/05 Bugzilla 671: Added umask to procmail example.
2376 JJ/03 installed exipick 20100323.0, fixing doc bug
2378 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2379 directory. Notification and patch from Dan Rosenberg.
2381 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2383 TK/02 Improve log output when DKIM signing operation fails.
2385 MH/01 Treat the transport option dkim_domain as a colon separated
2386 list, not as a single string, and sign the message with each element,
2387 omitting multiple occurences of the same signer.
2389 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2390 Bugzilla 985, 986. Patch by Simon Arlott
2392 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2393 Patch by Simon Arlott
2395 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2396 MBX locking. Notification from Dan Rosenberg.
2402 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2404 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2406 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2408 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2410 NM/04 Bugzilla 915: Flag broken perl installation during build.
2416 TK/01 Added patch by Johannes Berg that expands the main option
2417 "spamd_address" if it starts with a dollar sign.
2419 TK/02 Write list of recipients to X-Envelope-Sender header when building
2420 the mbox-format spool file for content scanning (suggested by Jakob
2423 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2424 (http://www.dcc-servers.net/) support via dccifd. Activated by
2425 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2427 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2428 by Mark Daniel Reidel <mr@df.eu>.
2430 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2431 When building exim an external PCRE library is now needed -
2432 PCRE is a system library on the majority of modern systems.
2433 See entry on PCRE_LIBS in EDITME file.
2435 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2436 conversation. Added nologin parameter to request.
2437 Patch contributed by Kirill Miazine.
2439 TF/01 Do not log submission mode rewrites if they do not change the address.
2441 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2443 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2444 log files in place. Contributed by Roberto Lima.
2446 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2448 TF/03 Bugzilla 615: When checking the local_parts router precondition
2449 after a local_part_suffix or local_part_prefix option, Exim now
2450 does not use the address's named list lookup cache, since this
2451 contains cached lookups for the whole local part.
2453 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2454 Robert Millan. Documentation is in experimental-spec.txt.
2456 TF/04 Bugzilla 668: Fix parallel build (make -j).
2458 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2460 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2461 Patch provided by Jan Srzednicki.
2463 TF/05 Leading white space used to be stripped from $spam_report which
2464 wrecked the formatting. Now it is preserved.
2466 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2467 that they are available at delivery time.
2469 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2471 TF/08 TLS error reporting now respects the incoming_interface and
2472 incoming_port log selectors.
2474 TF/09 Produce a more useful error message if an SMTP transport's hosts
2475 setting expands to an empty string.
2477 NM/06 Bugzilla 744: EXPN did not work under TLS.
2478 Patch provided by Phil Pennock.
2480 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2481 Patch provided by Richard Godbee.
2483 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2484 acl_smtp_notquit, added index entry.
2486 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2487 Patch provided by Eugene Bujak.
2489 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2490 accept(). Patch provided by Maxim Dounin.
2492 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2493 Patch provided by Phil Pennock.
2495 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2497 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2498 Patch provided by Brad "anomie" Jorsch.
2500 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2501 Patch provided by Dean Brooks.
2503 TK/05 Add native DKIM support (does not depend on external libraries).
2505 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2506 Patch provided by Graeme Fowler.
2508 NM/16 Bugzilla 851: Documentation example syntax fix.
2510 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2512 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2515 NM/19 Bugzilla 745: TLS version reporting.
2516 Patch provided by Phil Pennock.
2518 NM/20 Bugzilla 167: bool: condition support.
2519 Patch provided by Phil Pennock.
2521 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2522 clients. Patch provided by Phil Pennock.
2524 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2525 Patch provided by Brad "anomie" Jorsch.
2527 NM/23 Bugzilla 687: Fix misparses in eximstats.
2528 Patch provided by Heiko Schlittermann.
2530 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2531 Patch provided by Heiko Schlittermann.
2533 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2534 plus update to original patch.
2536 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2538 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2539 Patch provided by David Brownlee.
2541 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2543 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2545 NM/30 Bugzilla 888: TLS documentation bugfixes.
2547 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2549 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2550 Unlike the original bugzilla I have changed all shell scripts in src tree.
2552 NM/33 Bugzilla 898: Transport filter timeout fix.
2553 Patch by Todd Rinaldo.
2555 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2556 Patch by Serge Demonchaux.
2558 NM/35 Bugzilla 39: Base64 decode bug fixes.
2559 Patch by Jakob Hirsch.
2561 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2563 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2565 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2567 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2573 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2574 ALT-N's libdkim that I have put here:
2575 http://duncanthrax.net/exim-experimental/
2577 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2578 were called 'true' and it seems that C99 defines that as a reserved
2579 keyword to be used with 'bool' variable types. That means you could
2580 not include C99-style headers which use bools without triggering
2581 build errors in sieve.c.
2583 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2584 as mailq or other aliases. Changed the --help handling significantly
2585 to do whats expected. exim_usage() emits usage/help information.
2587 SC/01 Added the -bylocaldomain option to eximstats.
2589 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2591 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2593 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2599 PH/01 Another patch from the Sieve maintainer.
2601 PH/02 When an IPv6 address is converted to a string for single-key lookup
2602 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2603 dots are used instead of colons so that keys in lsearch files need not
2604 contain colons. This was done some time before quoting was made available
2605 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2606 (notated using the quote facility) so as to distinguish them from IPv4
2607 keys. This meant that lookups for IP addresses in host lists did not work
2608 for iplsearch lookups.
2610 This has been fixed by arranging for IPv6 addresses to be expressed with
2611 colons if the lookup type is iplsearch. This is not incompatible, because
2612 previously such lookups could never work.
2614 The situation is now rather anomalous, since one *can* have colons in
2615 ordinary lsearch keys. However, making the change in all cases is
2616 incompatible and would probably break a number of configurations.
2618 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2621 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2622 conversion specification without a maximum field width, thereby enabling
2623 a rogue spamd server to cause a buffer overflow. While nobody in their
2624 right mind would setup Exim to query an untrusted spamd server, an
2625 attacker that gains access to a server running spamd could potentially
2626 exploit this vulnerability to run arbitrary code as the Exim user.
2628 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2629 $primary_hostname instead of what libspf2 thinks the hosts name is.
2631 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2632 a directory entry by the name of the lookup key. Previously, if a
2633 symlink pointed to a non-existing file or a file in a directory that
2634 Exim lacked permissions to read, a lookup for a key matching that
2635 symlink would fail. Now it is enough that a matching directory entry
2636 exists, symlink or not. (Bugzilla 503.)
2638 PH/03 The body_linecount and body_zerocount variables are now exported in the
2641 PH/04 Added the $dnslist_matched variable.
2643 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2644 This means they are set thereafter only if the connection becomes
2647 PH/06 Added the client_condition to authenticators so that some can be skipped
2648 by clients under certain conditions.
2650 PH/07 The error message for a badly-placed control=no_multiline_responses left
2651 "_responses" off the end of the name.
2653 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2655 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2656 (without spaces) instead of just copying the configuration text.
2658 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2660 PH/11 Added $max_received_linelength.
2662 PH/12 Added +ignore_defer and +include_defer to host lists.
2664 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2665 way in which PCRE > 7.0 is built.
2667 PH/14 Implemented queue_only_load_latch.
2669 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2670 MAIL command. The effect was to mangle the value on 64-bit systems.
2672 PH/16 Another patch from the Sieve maintainer.
2674 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2676 PH/18 If a system quota error occurred while trying to create the file for
2677 a maildir delivery, the message "Mailbox is full" was not appended to the
2678 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2679 only to a quota excession during the actual writing of the file.
2681 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2682 characters?) which causes problems in log lines. The DN values are now
2683 passed through string_printing() before being added to log lines.
2685 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2686 and InterBase are left for another time.)
2688 PH/21 Added message_body_newlines option.
2690 PH/22 Guard against possible overflow in moan_check_errorcopy().
2692 PH/23 POSIX allows open() to be a macro; guard against that.
2694 PH/24 If the recipient of an error message contained an @ in the local part
2695 (suitably quoted, of course), incorrect values were put in $domain and
2696 $local_part during the evaluation of errors_copy.
2702 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2703 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2706 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2707 issue a MAIL command.
2709 PH/02 In an ACL statement such as
2711 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2713 if a client was not listed at all, or was listed with a value other than
2714 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2715 the condition was not true (as it should be), so access was not denied.
2716 The bug was that the ! inversion was incorrectly passed on to the second
2717 item. This has been fixed.
2719 PH/03 Added additional dnslists conditions == and =& which are different from
2720 = and & when the dns lookup returns more than one IP address.
2722 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2723 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2725 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2726 FSYNC, which compiles an option called disable_fsync that allows for
2727 bypassing fsync(). The documentation is heavily laced with warnings.
2729 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2731 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2732 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2733 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2734 including adding "make clean"; (3) Added -fPIC when compiling the test
2735 dynamically loaded module, to get rid of a warning.
2737 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2738 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2739 = 0s. The bug is otherwise harmless.
2741 PH/07 There was a bug in the dovecot authenticator such that the value of
2742 $auth1 could be overwritten, and so not correctly preserved, after a
2743 successful authentication. This usually meant that the value preserved by
2744 the server_setid option was incorrect.
2746 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2748 PH/09 Installed PCRE release 7.0.
2750 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2751 run for batched SMTP input. It is now run at the start of every message
2752 in the batch. While fixing this I discovered that the process information
2753 (output by running exiwhat) was not always getting set for -bs and -bS
2754 input. This is fixed, and it now also says "batched" for BSMTP.
2756 PH/11 Added control=no_pipelining.
2758 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2759 patch, slightly modified), and move the expansion of helo_data till after
2760 the connection is made in the smtp transport (so it can use these
2763 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2765 PH/14 Added log_selector = +pid.
2767 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2769 PH/16 Add ${if forany and ${if forall.
2771 PH/17 Added dsn_from option to vary the From: line in DSNs.
2773 PH/18 Flush SMTP output before performing a callout, unless control =
2774 no_callout_flush is set.
2776 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2777 was true (the default) a successful delivery failed to delete the retry
2778 item, thus causing premature timeout of the address. The bug is now
2781 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2783 PH/21 Long custom messages for fakedefer and fakereject are now split up
2784 into multiline responses in the same way that messages for "deny" and
2785 other ACL rejections are.
2787 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2788 with slight modification.
2790 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2791 draft, changing the syntax and factoring some duplicate code".
2793 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2794 for deliveries of the second and subsequent messages over the same SMTP
2797 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2798 ${reduce, with only minor "tidies".
2800 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2802 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2803 expansion side effects.
2805 PH/27 When a message times out after an over-quota error from an Exim-imposed
2806 quota, the bounce message says "mailbox is full". This message was not
2807 being given when it was a system quota that was exceeded. It now should
2810 MH/03 Made $recipients available in local_scan(). local_scan() already has
2811 better access to the recipient list through recipients_list[], but
2812 $recipients can be useful in postmaster-provided expansion strings.
2814 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2815 in the case of a MAIL command with additional options following the
2816 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2817 were accidentally chopped off.
2819 PH/29 SMTP synchronization checks are implemented when a command is read -
2820 there is a check that no more input is waiting when there shouldn't be
2821 any. However, for some commands, a delay in an ACL can mean that it is
2822 some time before the response is written. In this time, more input might
2823 arrive, invalidly. So now there are extra checks after an ACL has run for
2824 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2825 pipelining has not been advertised.
2827 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2829 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2830 returned in the SMTP response when smtp_return_error_details was false.
2831 This has been fixed.
2833 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2834 instead of the C I/O that was originally supplied, because problems were
2835 reported on Solaris.
2837 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2838 Exim which did not show up earlier: it was assuming that a call to
2839 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2840 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2841 was a macro that became an assignment, so it seemed to work. This has
2842 changed to a proper function call with a void return, hence the compile
2843 error. Exim's code has been fixed.
2845 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2848 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2850 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2852 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2853 because it turns out to be too big or there is a timeout) there is no
2854 "Completed" line in the log. When some messages of this type were
2855 selected by exigrep, they were listed as "not completed". Others were
2856 picked up by some special patterns. I have improved the selection
2857 criteria to be more general.
2859 PH/38 The host_find_failed option in the manualroute router can now be set
2860 to "ignore", to completely ignore a host whose IP address cannot be
2861 found. If all hosts are ignored, the behaviour is controlled by the new
2862 host_all_ignored option.
2864 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2865 homing or because of multiple MX records with /mx) generated more than
2866 one IP address, and the following item turned out to be the local host,
2867 all the secondary addresses of the first item were incorrectly removed
2868 from the list, along with the local host and any following hosts (which
2869 is what is supposed to happen).
2871 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2872 whoever called Exim into the -H file. In the case of the daemon it was
2873 behaving confusingly. When first started, it used values for whoever
2874 started the daemon, but after a SIGHUP it used the Exim user (because it
2875 calls itself on a restart). I have changed the code so that it now always
2878 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2879 message are rejected with the same error (e.g. no authentication or bad
2880 sender address), and a DATA command is nevertheless sent (as can happen
2881 with PIPELINING or a stupid MUA), the error message that was given to the
2882 RCPT commands is included in the rejection of the DATA command. This is
2883 intended to be helpful for MUAs that show only the final error to their
2886 PH/42 Another patch from the Sieve maintainer.
2888 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2889 Eximstats - Fixed some broken HTML links and added missing column headers
2891 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2892 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2894 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2896 PH/43 Yet another patch from the Sieve maintainer.
2898 PH/44 I found a way to check for a TCP/IP connection going away before sending
2899 the response to the final '.' that terminates a message, but only in the
2900 case where the client has not sent further data following the '.'
2901 (unfortunately, this is allowed). However, in many cases there won't be
2902 any further data because there won't be any more messages to send. A call
2903 to select() can be used: if it shows that the input is "ready", there is
2904 either input waiting, or the socket has been closed. An attempt to read
2905 the next input character can distinguish the two cases. Previously, Exim
2906 would have sent an OK response which the client would never have see.
2907 This could lead to message repetition. This fix should cure that, at
2908 least in a lot of common cases.
2910 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2911 advertised in response to EHLO.
2917 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2918 fixed by 4.65/MH/01 (is this a record?) are fixed:
2920 (i) An empty string was always treated as zero by the numeric comparison
2921 operators. This behaviour has been restored.
2923 (ii) It is documented that the numeric comparison operators always treat
2924 their arguments as decimal numbers. This was broken in that numbers
2925 starting with 0 were being interpreted as octal.
2927 While fixing these problems I realized that there was another issue that
2928 hadn't been noticed. Values of message_size_limit (both the global option
2929 and the transport option) were treated as octal if they started with 0.
2930 The documentation was vague. These values are now always treated as
2931 decimal, and I will make that clear in the documentation.
2937 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2938 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2941 MH/01 Don't check that the operands of numeric comparison operators are
2942 integers when their expansion is in "skipping" mode (fixes bug
2943 introduced by 4.64-PH/07).
2945 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2946 child addresses, Exim now panics and dies. Previously, because the count
2947 is held in a short int, deliveries were likely to be lost. As such a
2948 large number of recipients for a single message is ridiculous
2949 (performance will be very, very poor), I have chosen to impose a limit
2950 rather than extend the field.
2956 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2957 leftover -K file (the existence of which was triggered by #402).
2958 While we were at it, introduced process PID as part of the -K
2959 filename. This should rule out race conditions when creating
2962 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2963 processing considerably. Previous code took too long for large mails,
2964 triggering a timeout which in turn triggers #401.
2966 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2967 in the DK code in transports.c. sendfile() is not really portable,
2968 hence the _LINUX specificness.
2970 TF/01 In the add_headers option to the mail command in an Exim filter,
2971 there was a bug that Exim would claim a syntax error in any
2972 header after the first one which had an odd number of characters
2975 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2976 callout verification, Exim cached a "reject" for the entire domain. This
2977 is correct for most verifications, but it is not correct for a recipient
2978 verification with use_sender or use_postmaster set, because in that case
2979 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2980 case of MAIL FROM:<> rejection from other early rejections (e.g.
2981 rejection of HELO). When verifying a recipient using a non-null MAIL
2982 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2983 Whatever the result of the callout, the value of the domain cache is
2984 left unchanged (for any other kind of callout, getting as far as trying
2985 RCPT means that the domain itself is ok).
2987 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2990 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2991 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2992 session, the daemon ignores ECONNECT errors and logs others; it now
2993 ignores EPIPE as well.
2995 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2996 (quoted-printable decoding).
2998 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2999 later the small subsequent patch to fix an introduced bug.
3001 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3003 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3005 PH/08 An error is now given if message_size_limit is specified negative.
3007 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3008 to be given (somewhat) arbitrary names.
3010 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3013 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3014 miscellaneous code fixes
3016 PH/10 Added the log_reject_target ACL modifier to specify where to log
3019 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3020 hostname. This is wrong, because it relates to the incoming message (and
3021 probably the interface on which it is arriving) and not to the outgoing
3022 callout (which could be using a different interface). This has been
3023 changed to use the value of the helo_data option from the smtp transport
3024 instead - this is what is used when a message is actually being sent. If
3025 there is no remote transport (possible with a router that sets up host
3026 addresses), $smtp_active_hostname is used.
3028 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3029 tweaks were necessary in order to get it to work (see also 21 below):
3030 (a) The code assumed that strncpy() returns a negative number on buffer
3031 overflow, which isn't the case. Replaced with Exim's string_format()
3033 (b) There were several signed/unsigned issues. I just did the minimum
3034 hacking in of casts. There is scope for a larger refactoring.
3035 (c) The code used strcasecmp() which is not a standard C function.
3036 Replaced with Exim's strcmpic() function.
3037 (d) The code set only $1; it now sets $auth1 as well.
3038 (e) A simple test gave the error "authentication client didn't specify
3039 service in request". It would seem that Dovecot has changed its
3040 interface. Fortunately there's a specification; I followed it and
3041 changed what the client sends and it appears to be working now.
3043 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3046 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3047 address A is aliased to B and C, where B exists and C does not. Without
3048 -v the output is "A verified" because verification stops after a
3049 successful redirection if more than one address is generated. However,
3050 with -v the child addresses are also verified. Exim was outputting "A
3051 failed to verify" and then showing the successful verification for C,
3052 with its parentage. It now outputs "B failed to verify", showing B's
3053 parentage before showing the successful verification of C.
3055 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3056 look up a TXT record in a specific list after matching in a combined
3059 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3060 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3061 they consult the DNS. I had assumed they would set it the way they
3062 wanted; and indeed my experiments on Linux seem to show that in some
3063 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3064 To be on the safe side, however, I have now made the interface to
3065 host_find_byname() similar to host_find_bydns(), with an argument
3066 containing the DNS resolver options. The host_find_byname() function now
3067 sets these options at its start, just as host_find_bydns() does. The smtp
3068 transport options dns_qualify_single and dns_search_parents are passed to
3069 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3070 of host_find_byname() use the default settings of RES_DEFNAMES
3071 (qualify_single) but not RES_DNSRCH (search_parents).
3073 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3074 spool_read_header() do less string testing, by means of a preliminary
3075 switch on the second character of optional "-foo" lines. (This is
3076 overdue, caused by the large number of possibilities that now exist.
3077 Originally there were few.) While I was there, I also converted the
3078 str(n)cmp tests so they don't re-test the leading "-" and the first
3079 character, in the hope this might squeeze out yet more improvement.
3081 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3082 flag allowing group syntax was set by the header_syntax check but not
3083 turned off, possible causing trouble later; (2) The flag was not being
3084 set at all for the header_verify test, causing "group"-style headers to
3085 be rejected. I have now set it in this case, and also caused header_
3086 verify to ignore an empty address taken from a group. While doing this, I
3087 came across some other cases where the code for allowing group syntax
3088 while scanning a header line wasn't quite right (mostly, not resetting
3089 the flag correctly in the right place). These bugs could have caused
3090 trouble for malformed header lines. I hope it is now all correct.
3092 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3093 with the "reply" argument non-NULL. The code, however (which originally
3094 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3095 but it didn't always do it. This confused somebody who was copying the
3096 code for some other use. I have removed all the tests.
3098 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3099 feature that was used to support insecure browsers during the U.S. crypto
3100 embargo. It requires special client support, and Exim is probably the
3101 only MTA that supported it -- and would never use it because real RSA is
3102 always available. This code has been removed, because it had the bad
3103 effect of slowing Exim down by computing (never used) parameters for the
3104 RSA_EXPORT functionality.
3106 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3107 authenticator to fail if there's a tab character in the incoming data
3108 (there should never be unless someone is messing about, as it's supposed
3109 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3110 if the connection is using TLS or if the remote IP is the same as the
3111 local IP, and the "valid-client-cert option" if a client certificate has
3114 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3115 authenticators. This can be used for authorization after authentication
3116 succeeds. (In the case of plaintext, it servers for both authentication
3119 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3120 if any retry times were supplied.
3122 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3123 connection, where there is no client IP address to check. In this
3124 situation, the verify now always succeeds.
3126 PH/25 Applied John Jetmore's -Mset patch.
3128 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3130 PH/27 In a string expansion for a processed (not raw) header when multiple
3131 headers of the same name were present, leading whitespace was being
3132 removed from all of them, but trailing whitespace was being removed only
3133 from the last one. Now trailing whitespace is removed from each header
3134 before concatenation. Completely empty headers in a concatenation (as
3135 before) are ignored.
3137 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3138 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3140 PH/29 [Removed. This was a change that I later backed out, and forgot to
3141 correct the ChangeLog entry (that I had efficiently created) before
3142 committing the later change.]
3144 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3145 address errors (4xx response to RCPT) over the same connection as other
3146 messages routed to the same hosts. Such deliveries are always "forced",
3147 so retry times are not inspected. This resulted in far too many retries
3148 for the affected addresses. The effect occurred only when there were more
3149 hosts than the hosts_max_try setting in the smtp transport when it had
3150 the 4xx errors. Those hosts that it had tried were not added to the list
3151 of hosts for which the message was waiting, so if all were tried, there
3152 was no problem. Two fixes have been applied:
3154 (i) If there are any address or message errors in an SMTP delivery, none
3155 of the hosts (tried or untried) are now added to the list of hosts
3156 for which the message is waiting, so the message should not be a
3157 candidate for sending over the same connection that was used for a
3158 successful delivery of some other message. This seems entirely
3159 reasonable: after all the message is NOT "waiting for some host".
3160 This is so "obvious" that I'm not sure why it wasn't done
3161 previously. Hope I haven't missed anything, but it can't do any
3162 harm, as the worst effect is to miss an optimization.
3164 (ii) If, despite (i), such a delivery is accidentally attempted, the
3165 routing retry time is respected, so at least it doesn't keep
3166 hammering the server.
3168 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3169 in ${readsocket because some servers need this prod.
3171 PH/32 Added some extra debug output when updating a wait-xxx database.
3173 PH/33 The hint "could be header name not terminated by colon", which has been
3174 given for certain expansion errors for a long time, was not being given
3175 for the ${if def:h_colon_omitted{... case.
3177 PH/34 The spec says: "With one important exception, whenever a domain list is
3178 being scanned, $domain contains the subject domain." There was at least
3179 one case where this was not true.
3181 PH/35 The error "getsockname() failed: connection reset by peer" was being
3182 written to the panic log as well as the main log, but it isn't really
3183 panic-worthy as it just means the connection died rather early on. I have
3184 removed the panic log writing for the ECONNRESET error when getsockname()
3187 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3188 runs only) independently of the message's sender address. This meant
3189 that, if the 4xx error was in fact related to the sender, a different
3190 message to the same recipient with a different sender could confuse
3191 things. In particular, this can happen when sending to a greylisting
3192 server, but other circumstances could also provoke similar problems.
3193 I have changed the default so that the retry time for these errors is now
3194 based a combination of the sender and recipient addresses. This change
3195 can be overridden by setting address_retry_include_sender=false in the
3198 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3199 remote server are returned as part of bounce messages. This was not
3200 happening for LMTP over a pipe (the lmtp transport), but now it is the
3201 same for both kinds of LMTP.
3203 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3204 in header lines that were in fact CNAMEs. This is no longer the case.
3206 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3207 and queue runs started by the daemon processed all messages. This has
3208 been fixed so that -R and -S can now usefully be given with -q<time>.
3210 PH/40 Import PCRE release 6.7 (fixes some bugs).
3212 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3214 PH/42 Give an error if -q is specified more than once.
3216 PH/43 Renamed the variables $interface_address and $interface_port as
3217 $received_ip_address and $received_port, to make it clear that these
3218 values apply to message reception, and not to the outgoing interface when
3219 a message is delivered. (The old names remain recognized, of course.)
3221 PH/44 There was no timeout on the connect() call when using a Unix domain
3222 socket in the ${readsocket expansion. There now is.
3224 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3225 be meaningful with "accept".
3227 SC/01 Eximstats V1.43
3228 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3230 SC/02 Eximstats V1.44
3231 Use a glob alias rather than an array ref in the generated
3232 parser. This improves both readability and performance.
3234 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3235 Collect SpamAssassin and rejection statistics.
3236 Don't display local sender or destination tables unless
3237 there is data to show.
3238 Added average volumes into the top table text output.
3240 SC/04 Eximstats V1.46
3241 Collect data on the number of addresses (recipients)
3242 as well as the number of messages.
3244 SC/05 Eximstats V1.47
3245 Added 'Message too big' to the list of mail rejection
3246 reasons (thanks to Marco Gaiarin).
3248 SC/06 Eximstats V1.48
3249 Mainlog lines which have GMT offsets and are too short to
3250 have a flag are now skipped.
3252 SC/07 Eximstats V1.49 (Alain Williams)
3253 Added the -emptyok flag.
3255 SC/08 Eximstats V1.50
3256 Fixes for obtaining the IP address from reject messages.
3258 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3259 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3260 whitespace changes from 4.64-PH/27
3262 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3265 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3266 are found, allow negative numbers in numeric criteria)
3268 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3270 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3271 to match changes made in 4.64-PH/43
3273 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3275 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3276 "domain" is actually an IP address, and force a failure. This locks out
3277 those revolvers/nameservers that support "A-for-A" lookups, in
3278 contravention of the specifications.
3280 PH/48 When a host name was looked up from an IP address, and the subsequent
3281 forward lookup of the name timed out, the host name was left in
3282 $sender_host_name, contrary to the specification.
3284 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3285 restricted to single-key lookups, Exim was not diagnosing an error if
3286 * or *@ was used with a query-style lookup.
3288 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3290 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3291 long ago, but noone interested enough thought of it. Let's just say that
3292 the "1.1" means that there are some new functions that weren't there at
3293 some point in the past.
3295 PH/51 Error processing for expansion failure of helo_data from an smtp
3296 transport during callout processing was broken.
3298 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3299 tested/used via the -bh/-bhc/-bs options.
3301 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3302 bug, fixed in subsequent PCRE releases).
3304 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3305 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3307 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3313 SC/01 Use a glob alias rather than an array ref in eximstats generated
3314 parser. This improves both readability and performance.
3316 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3317 Don't display local sender or destination tables in eximstats unless
3318 there is data to show.
3319 Added average volumes into the eximstats top table text output.
3321 SC/03 Collect data on the number of addresses (recipients) as well
3322 as the number of messages in eximstats.
3324 TF/01 Correct an error in the documentation for the redirect router. Exim
3325 does (usually) call initgroups() when daemonizing.
3327 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3328 with consistent privilege compared to when running as a daemon.
3330 TF/03 Note in the spec that $authenticated_id is not set for local
3331 submissions from trusted users.
3333 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3334 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3336 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3337 by adding some example configuration directives to the default
3338 configuration file. A little bit of work is required to uncomment the
3339 directives and define how usernames and passwords are checked, but
3340 there is now a framework to start from.
3342 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3343 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3344 without this. I don't know how relevant this is to other LDAP libraries.
3346 PH/02 Add the verb name to the "unknown ACL verb" error.
3348 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3350 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3352 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3353 directory not expanded when it should be if an expanded home directory
3354 was set for the address (which is overridden by the transport).
3356 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3359 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3360 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3361 because it is too late at that time, and has no effect.
3363 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3364 security issue with \' (bugzilla #107). I could not use the
3365 PQescapeStringConn() function, because it needs a PGconn value as one of
3368 PH/08 When testing addresses using -bt, indicate those final addresses that
3369 are duplicates that would not cause an additional delivery. At least one
3370 person was confused, thinking that -bt output corresponded to deliveries.
3371 (Suppressing duplicates isn't a good idea as you lose the information
3372 about possibly different redirections that led to the duplicates.)
3374 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3375 systems where poll() doesn't work, in particular OS X.
3377 PH/10 Added more information to debugging output for retry time not reached.
3379 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3380 operations in malware.c.
3382 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3385 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3386 syslog_duplication set false, log lines that would normally be written
3387 both the the main log and to the reject log were not written to syslog at
3390 PH/14 In the default configuration, change the use of "message" in ACL warn
3391 statements to "add_header".
3393 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3394 not followed by a command (e.g. "seen endif").
3396 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3397 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3400 PH/17 Added extra conditions to the default value of delay_warning_condition
3404 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3405 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3406 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3409 The Auto-Submitted: and various List- headers are standardised, whereas I
3410 don't think Precedence: ever was.
3412 PH/18 Refactored debugging code in route_finduser() to show more information,
3413 in particular, the error code if getpwnam() issues one.
3415 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3416 This is apparently needed in addition to the PH/07 change above to avoid
3417 any possible encoding problems.
3419 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3420 but not after initializing Perl.
3422 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3423 output them only if debugging. By default they are written stderr,
3424 apparently, which is not desirable.
3426 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3429 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3432 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3434 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3435 authenticated or an ident call has been made. Suppress the default
3436 values for $authenticated_id and $authenticated_sender (but permit -oMai
3437 and -oMas) when testing with -bh.
3439 PH/24 Re-jigged the order of the tests in the default configuration so that the
3440 tests for valid domains and recipients precede the DNS black list and CSA
3441 tests, on the grounds that those ones are more expensive.
3443 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3444 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3445 This bug exists in every version of Exim that I still have, right back to
3448 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3449 However, an attempt to turn on case-sensitivity in a regex key by
3450 including (?-i) didn't work because the subject string was already
3451 lowercased, and the effects were non-intuitive. It turns out that a
3452 one-line patch can be used to allow (?-i) to work as expected.
3458 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3459 other effects) broke the use of negated acl sub-conditions.
3461 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3464 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3465 "Deny" causes Exim to reject the incoming connection with a 554 error.
3466 Unfortunately, if there is a major crisis, such as a disk failure,
3467 tcp-wrappers gives "deny", whereas what one would like would be some
3468 kind of temporary error. A kludge has been added to help with this.
3469 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3470 554 error is used if errno is still zero or contains ENOENT (which occurs
3471 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3474 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3476 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3477 errors. Otherwise a message that provokes a temporary error (when other
3478 messages do not) can cause a whole host to time out.
3480 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3481 addresses were routed directly to files or pipes from a redirect router.
3482 File deliveries just didn't batch; pipe deliveries might have suffered
3485 PH/06 A failure to get a lock for a hints database would erroneously always say
3486 "Failed to get write lock", even when it was really a read lock.
3488 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3489 of 0600. This has been changed to use the value of the lockfile_mode
3490 option (which defaults to 0600).
3492 PH/08 Applied small patch from the Sieve maintainer.
3494 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3495 folder from quota calculations, a direct delivery into this folder messed
3496 up the contents of the maildirsize file. This was because the regex was
3497 used only to exclude .Trash (or whatever) when the size of the mailbox
3498 was calculated. There was no check that a delivery was happening into an
3499 excluded directory. This bug has been fixed by ignoring all quota
3500 processing for deliveries into excluded directories.
3502 PH/10 Added the maildirfolder_create_regex option to appendfile.
3508 PH/01 The code for finding all the local interface addresses on a FreeBSD
3509 system running IPv6 was broken. This may well have applied to all BSD
3510 systems, as well as to others that have similar system calls. The broken
3511 code found IPv4 interfaces correctly, but gave incorrect values for the
3512 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3513 that it would not match correctly against @[] and not recognize the IPv6
3516 PH/02 The ipliteral router was not recognizing addresses of the form user@
3517 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3519 PH/03 Added disable_ipv6.
3521 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3522 decoded form, because it is most often used to construct To: headers
3523 lines in autoreplies, and the decoded form may well be syntactically
3524 invalid. However, $reply_address has leading white space removed, and all
3525 newlines turned into spaces so that the autoreply transport does not
3528 PH/05 If group was specified without a user on a router, and no group or user
3529 was specified on a transport, the group from the router was ignored.
3531 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3532 for visible compile-time settings that can be used to change these
3533 numbers, for those that want even more. Backwards compatibility with old
3534 spool files has been maintained. However, going back to a previous Exim
3535 release will lost any variables that are in spool files.
3537 PH/07 Two small changes when running in the test harness: increase delay when
3538 passing a TCP/IP connection to a new process, in case the original
3539 process has to generate a bounce, and remove special handling of
3540 127.0.0.2 (sic), which is no longer necessary.
3542 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3543 be the same on different OS.
3545 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3548 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3549 whether --show-vars was specified or not
3551 JJ/02 exipick: Added support for new ACL variable spool format introduced
3554 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3555 syntactically invalid From: or Reply-to: line, and a filter used this to
3556 generate an autoreply, and therefore failed to obtain an address for the
3557 autoreply, Exim could try to deliver to a non-existent relative file
3558 name, causing unrelated and misleading errors. What now happens is that
3559 it logs this as a hard delivery error, but does not attempt to create a
3562 PH/11 The exinext utility has a -C option for testing purposes, but although
3563 the given file was scanned by exinext itself; it wasn't being passed on
3564 when Exim was called.
3566 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3567 an end-of-file indication when reading a command response.
3569 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3570 compiled. In many other places in Exim, IPv6 addresses are always
3571 recognized, so I have changed this. It also means that IPv4 domain
3572 literals of the form [IPV4:n.n.n.n] are now always recognized.
3574 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3575 used if the router is not running as root, for example, when verifying at
3576 ACL time, or when using -bh. The debugging output from this situation was
3577 non-existent - all you got was a failure to exec. I have made two
3580 (a) Failures to set uid/gid, the current directory, or a process leader
3581 in a subprocess such as that created by queryprogram now generate
3582 suitable debugging output when -d is set.
3584 (b) The queryprogram router detects when it is not running as root,
3585 outputs suitable debugging information if -d is set, and then runs
3586 the subprocess without attempting to change uid/gid.
3588 PH/15 Minor change to Makefile for building test_host (undocumented testing
3591 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3592 additional section of a DNS packet that returns MX or SRV records.
3593 Instead, it always explicitly searches for A/AAAA records. This avoids
3594 major problems that occur when a DNS server includes only records of one
3595 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3596 fixed another bug: if SRV records were looked up and the corresponding
3597 address records were *not* found in the additional section, the port
3598 values from the SRV records were lost.
3600 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3601 using the correct key (the original address) when searching the retry
3602 rules in order to find which one to use for generating the retry hint.
3604 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3605 adding the default one. Similarly, if it contains a Reply-To: header, the
3606 errors_reply_to option, if set, is not used.
3608 PH/19 When calculating a retry time, Exim used to measure the "time since
3609 failure" by looking at the "first failed" field in the retry record. Now
3610 it does not use this if it is later than than the arrival time of the
3611 message. Instead it uses the arrival time. This makes for better
3612 behaviour in cases where some deliveries succeed, thus re-setting the
3613 "first failed" field. An example is a quota failure for a huge message
3614 when small messages continue to be delivered. Without this change, the
3615 "time since failure" will always be short, possible causing more frequent
3616 delivery attempts for the huge message than are intended.
3617 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3619 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3620 $1, $2, $3) because the numerical variables can be reset during some
3621 expansion items (e.g. "match"), thereby losing the authentication data.
3623 PH/21 Make -bV show the size of off_t variables so that the test suite can
3624 decide whether to run tests for quotas > 2G.
3626 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3627 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3628 filecount value is greater than 2G or if a quota value is greater than 2G
3629 on a system where the size of off_t is not greater than 4, a panic error
3632 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3633 never match. The debug and -bh output now contains an explicit error
3634 message indicating a malformed IPv4 address or mask.
3636 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3637 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3638 PH/23 above applies.
3640 PH/25 Do not write to syslog when running in the test harness. The only
3641 occasion when this arises is a failure to open the main or panic logs
3642 (for which there is an explicit test).
3644 PH/26 Added the /no_tell option to "control=freeze".
3646 PH/27 If a host name lookup failed very early in a connection, for example, if
3647 the IP address matched host_lookup and the reverse lookup yielded a name
3648 that did not have a forward lookup, an error message of the form "no IP
3649 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3650 could be logged. Now it outputs the IP address instead of "NULL".
3652 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3653 allows the sender and the authenticated sender to be set when
3654 submitting a message from within Exim. Since child_open_exim() is
3655 documented for local_scan(), the new function should be too.
3657 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3658 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3659 results in an empty string is now treated as unset.
3661 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3663 PH/31 Added sender_verify_fail logging option.
3665 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3666 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3667 tidied the source and removed it altogether.
3669 PH/33 When a queue run was abandoned because the load average was too high, a
3670 log line was always written; now it is written only if the queue_run log
3671 selector is set. In addition, the log line for abandonment now contains
3672 information about the queue run such as the pid. This is always present
3673 in "start" and "stop" lines but was omitted from the "abandon" line.
3675 PH/34 Omit spaces between a header name and the colon in the error message that
3676 is given when verify = headers_syntax fails (if there are lots of them,
3677 the message gets confusing).
3679 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3680 names, as there are now some PTR records that contain slashes. This check
3681 is only to protect against broken name servers that fall over on strange
3682 characters, so the fact that it applies to all lookups doesn't matter.
3684 PH/36 Now that the new test suite is complete, we can remove some of the
3685 special code in Exim that was needed for the old test suite. For example,
3686 sorting DNS records because real resolvers return them in an arbitrary
3687 order. The new test suite's fake resolver always returns records in the
3690 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3691 bounces) except when queue_only is set, to avoid logging races between
3692 the different processes.
3694 PH/38 Panic-die if .include specifies a non-absolute path.
3696 PH/39 A tweak to the "H" retry rule from its user.
3698 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3699 a label. They prevented compilation on older perls.
3701 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3702 a warning to be raised on newish perls.
3704 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3705 on queue. Changes to match documented behaviour of showing count of
3706 messages matching specified criteria.
3708 PH/40 Changed the default ident timeout from 30s to 5s.
3710 PH/41 Added support for the use of login_cap features, on those BSD systems
3711 that have them, for controlling the resources used by pipe deliveries.
3713 PH/42 The content-scanning code uses fopen() to create files in which to put
3714 message data. Previously it was not paying any attention to the mode of
3715 the files. Exim runs with umask(0) because the rest of the code creates
3716 files with open(), and sets the required mode explicitly. Thus, these
3717 files were ending up world-writeable. This was not a big issue, because,
3718 being within the spool directory, they were not world-accessible. I have
3719 created a function called modefopen, which takes an additional mode
3720 argument. It sets umask(777), creates the file, chmods it to the required
3721 mode, then resets the umask. All the relevant calls to fopen() in the
3722 content scanning code have been changed to use this function.
3724 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3725 to 24 hours. This avoids potential overflow problems when processing G
3726 and H retry rules. I suspect nobody ever tinkers with this value.
3728 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3730 PH/45 When the plaintext authenticator is running as a client, the server's
3731 challenges are checked to ensure they are valid base64 strings. By
3732 default, the authentication attempt is cancelled if an invalid string is
3733 received. Setting client_ignore_invalid_base64 true ignores these errors.
3734 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3735 they are received. Thus, the responses can be made to depend on the
3736 challenges. If an invalid string is ignored, an empty string is placed in
3739 PH/46 Messages that are created by the autoreply transport now contains a
3740 References: header, in accordance with RFCs 2822 and 3834.
3742 PH/47 Added authenticated_sender_force to the smtp transport.
3744 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3746 PH/49 Installed latest patch from the Sieve maintainer.
3748 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3749 was also set, the appendfile transport was unnecessarily scanning a
3750 directory of message files (e.g. for maildir delivery) to find the count
3751 of files (along with the size), even though it did not need this
3752 information. It now does the scan only if it needs to find either the
3753 size of the count of files.
3755 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3757 PH/52 Two bugs concerned with error handling when the smtp transport is
3760 (i) Exim was not creating retry information for temporary errors given
3761 for individual recipients after the DATA command when the smtp transport
3762 was used in LMTP mode. This meant that they could be retried too
3763 frequently, and not timed out correctly.
3765 (ii) Exim was setting the flag that allows error details to be returned
3766 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3767 recipients that were returned after the DATA command.
3769 PH/53 This is related to PH/52, but is more general: for any failing address,
3770 when detailed error information was permitted to be returned to the
3771 sender, but the error was temporary, then after the final timeout, only
3772 "retry timeout exceeded" was returned. Now it returns the full error as
3773 well as "retry timeout exceeded".
3775 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3776 do this, and (what is worse) MTAs that accept it.
3778 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3779 will now be deprecated.
3781 PH/56 New os.c-cygwin from the Cygwin maintainer.
3783 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3784 formats (previously only available in exim formats via -bpr, -bpru,
3785 and -bpra. Now also available in native and exiqgrep formats)
3787 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3788 with very large, slow to parse queues
3790 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3792 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3794 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3795 responses to authentication challenges, though it was showing the
3796 challenges; (ii) I've removed the CR characters from the debug output for
3799 PH/58 Allow for the insertion of a newline as well as a space when a string
3800 is turned into more than one encoded-word during RFC 2047 encoding. The
3801 Sieve code now uses this.
3803 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3804 data_4xx, lost_connection, tls_required.
3806 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3807 message was being sent as an SMTP response.
3809 PH/61 Add -l and -k options to exicyclog.
3811 PH/62 When verifying, if an address was redirected to one new address, so that
3812 verification continued, and the new address failed or deferred after
3813 having set something in $address_data, the value of $address_data was not
3814 passed back to the ACL. This was different to the case when no
3815 redirection occurred. The value is now passed back in both cases.
3817 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3818 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3819 use login_cap.h, so on its own it isn't the distinguishing feature. The
3820 new name refers directly to the setclassresources() function.
3822 PH/65 Added configuration files for NetBSD3.
3824 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3826 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3827 is preferred over IPv4.
3829 PH/68 The bounce_return_message and bounce_return_body options were not being
3830 honoured for bounces generated during the reception of non-SMTP messages.
3831 In particular, this applied to messages rejected by the ACL. This bug has
3832 been fixed. However, if bounce_return_message is true and bounce_return_
3833 body is false, the headers that are returned for a non-SMTP message
3834 include only those that have been read before the error was detected.
3835 (In the case of an ACL rejection, they have all been read.)
3837 PH/69 The HTML version of the specification is now built in a directory called
3838 spec_html instead of spec.html, because the latter looks like a path with
3839 a MIME-type, and this confuses some software.
3841 PH/70 Catch two compiler warnings in sieve.c.
3843 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3844 function verify_get_ident() calls ip_connect() to connect a socket, but
3845 if the "connect()" function timed out, ip_connect() used to close the
3846 socket. However, verify_get_ident() also closes the socket later, and in
3847 between Exim writes to the log, which may get opened at this point. When
3848 the socket was closed in ip_connect(), the log could get the same file
3849 descriptor number as the socket. This naturally causes chaos. The fix is
3850 not to close the socket in ip_connect(); the socket should be closed by
3851 the function that creates it. There was only one place in the code where
3852 this was missing, in the iplookup router, which I don't think anybody now
3853 uses, but I've fixed it anyway.
3855 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3856 well as to direct DNS lookups. Otherwise the handling of names in host
3857 lists is inconsistent and therefore confusing.
3863 PH/01 Two changes to the default runtime configuration:
3865 (1) Move the checks for relay_from_hosts and authenticated clients from
3866 after to before the (commented out) DNS black list checks.
3868 (2) Add control=submission to the relay_from_hosts and authenticated
3869 clients checks, on the grounds that messages accepted by these
3870 statements are most likely to be submissions.
3872 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3874 (1) Generate an error if the third argument for the ${prvs expansion is
3877 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3880 (3) Reset the variables that are obtained from the first argument of
3881 ${prvscheck and used in the second argument before leaving the code,
3882 because their memory is reclaimed, so using them afterwards may do
3885 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3886 one (it's much easier than Tom thought :-).
3888 (5) Because of (4), we can now allow for the use of $prvscheck_result
3889 inside the third argument.
3891 PH/03 For some reason, the default setting of PATH when running a command from
3892 a pipe transport was just "/usr/bin". I have changed it to
3895 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3896 anything to be listed in the output from -bV.
3898 PH/05 When a filter generated an autoreply, the entire To: header line was
3899 quoted in the delivery log line, like this:
3901 => >A.N.Other <ano@some.domain> <original@ddress> ...
3903 This has been changed so that it extracts the operative address. There
3904 may be more than one such address. If so, they are comma-separated, like
3907 => >ano@some.domain,ona@other.domain <original@ddress> ...
3909 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3910 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3911 not being looked up in the rDNS to get a host name, Exim was showing the
3912 IP address twice in Received: lines, even though the IP addresses were
3913 identical. For example:
3915 Received: from [1.2.3.4] (helo=[1.2.3.4])
3917 However, if the real host name was known, it was omitting the HELO data
3918 if it matched the actual IP address. This has been tidied up so that it
3919 doesn't show the same IP address twice.
3921 PH/07 When both +timestamp and +memory debugging was on, the value given by
3922 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3923 called by the debug printing, thereby overwriting the timestamp buffer.
3924 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3926 PH/08 When the original message was included in an autoreply transport, it
3927 always said "this is a copy of the message, including all the headers",
3928 even if body_only or headers_only was set. It now gives an appropriate
3931 PH/09 Applied a patch from the Sieve maintainer which:
3933 o fixes some comments
3934 o adds the (disabled) notify extension core
3935 o adds some debug output for the result of if/elsif tests
3936 o points to the current vacation draft in the documentation
3937 and documents the missing references header update
3941 o fixes a bug in processing the envelope test (when testing
3942 multiple envelope elements, the last element determined the
3945 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3946 Electronic Mail") by including:
3948 Auto-submitted: auto-generated
3950 in the messages that it generates (bounce messages and others, such as
3951 warnings). In the case of bounce messages for non-SMTP messages, there was
3952 also a typo: it was using "Auto_submitted" (underscore instead of
3953 hyphen). Since every message generated by Exim is necessarily in response
3954 to another message, thes have all been changed to:
3956 Auto-Submitted: auto-replied
3958 in accordance with these statements in the RFC:
3960 The auto-replied keyword:
3962 - SHOULD be used on messages sent in direct response to another
3963 message by an automatic process,
3965 - MUST NOT be used on manually-generated messages,
3967 - MAY be used on Delivery Status Notifications (DSNs) and Message
3968 Disposition Notifications (MDNs),
3970 - MUST NOT be used on messages generated by automatic or periodic
3971 processes, except for messages which are automatic responses to
3974 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3975 to the default Received: header definition.
3977 PH/12 Added log selector acl_warn_skipped (default on).
3979 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3980 variables because (a) they are in the wrong storage pool and (b) even if
3981 they were copied, it wouldn't work properly because of the caching.
3983 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3984 checking when decoding. Apparently there are clients that generate
3985 overlong encoded strings. Why am I not surprised?
3987 PH/15 If the first argument of "${if match_address" was not empty, but did not
3988 contain an "@" character, Exim crashed. Now it writes a panic log message
3989 and treats the condition as false.
3991 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3993 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3994 extension "envelope-auth". The code is finished and in agreement with
3995 other implementations, but there is no documentation so far and in fact,
3996 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3997 not changing the active code.
3999 Print executed "if" and "elsif" statements when debugging is used. This
4000 helps a great deal to understand what a filter does.
4002 Document more things not specified clearly in RFC3028. I had all this
4003 sorted out, when out of a sudden new issues came to my mind. Oops."
4005 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4008 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4009 canonical form (as documented). However, after a host name lookup from
4010 the IP address, check_host() was doing a simple string comparison with
4011 addresses acquired from the DNS when checking that the found name did
4012 have the original IP as one of its addresses. Since any found IPv6
4013 addresses are likely to be in abbreviated form, the comparison could
4014 fail. Luckily, there already exists a function for doing the comparison
4015 by converting both addresses to binary, so now that is used instead of
4016 the text comparison.
4018 PH/20 There was another similar case to PH/19, when a complete host name was
4019 given in a host list; looking up its IP address could give an abbreviated
4020 form, whereas the current host's name might or might not be abbreviated.
4021 The same fix has been applied.
4027 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4028 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4031 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4032 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4034 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4036 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4037 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4038 Also, for "Auto-Submitted", treat anything other than "no" as
4039 non-personal, in accordance with RFC 3834. (Previously it treated
4040 anything starting "auto-" as non-personal.)
4042 TF/01 The control=submission/name=... option had a problem with syntax
4043 errors if the name included a slash character. The /name= option
4044 now slurps the rest of the string, so it can include any characters
4045 but it must come last in the list of options (after /sender_retain
4048 PH/05 Some modifications to the interface to the fake nameserver for the new
4056 TK/01 Added the "success_on_redirect" address verification option. See
4057 NewStuff for rationale and an example.
4059 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4061 PH/02 Patch to exigrep to allow it to work on syslog lines.
4063 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4064 fread() to skip over the body file's header line, because in Cygwin the
4065 header line is locked and is inaccessible.
4067 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4068 co-exist for some time) to make it clear that it is the Exim ID that is
4069 referenced, not the Message-ID: header line.
4071 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4072 string_format() function, because snprintf() does not exist on all
4075 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4076 ${stat: expansion item.
4078 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4079 protocol synchronization error", to keep the pedants happy.
4081 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4082 well as for IRIX systems, when gcc is being used. See the host.c source
4085 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4087 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4090 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4091 transport and to the smtp transport in LMTP mode.
4093 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4095 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4096 run a filter in a subprocess. This could lead to confusion in subsequent
4097 lookups in the parent process. There should also be a search_tidyup() at
4098 the end of the subprocess.
4100 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4101 only if the host matched helo_try_verify_hosts, which caused the
4102 verification to occur when the EHLO/HELO command was issued. The ACL just
4103 tested the remembered result. Now, if a previous verification attempt has
4104 not happened, "verify = helo" does it there and then.
4106 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4108 TK/03 Fix log output including CR from clamd.
4110 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4111 exist provoked a memory error which could cause a segfault.
4113 PH/15 Installed PCRE 6.2
4115 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4117 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4118 of the problem. Specifically, suggested +O2 rather than +O1 for the
4121 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4123 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4124 record, the port was not correctly logged when the outgoing_port log
4125 selector was set (it logged the transort's default port).
4127 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4128 fallback_hosts, and "hosts" in the smtp transport.
4130 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4131 host errors such as "Connection refused".
4133 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4134 authentication with radiusclient 0.4.9:
4136 - Error returned from rc_read_config was caught wrongly
4137 - Username/password not passed on to radius server due to wrong length.
4139 The presumption is that some radiusclient API changes for 4.51/PH/17
4140 were not taken care of correctly. The code is still untested by me (my
4141 Linux distribution still has 0.3.2 of radiusclient), but it was
4142 contributed by a Radius user.
4144 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4145 expanding the "port" option of the smtp transport.
4147 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4148 while reading a MIME header. Thanks to Tom Hughes for a patch.
4150 PH/24 Include config.h inside local_scan.h so that configuration settings are
4153 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4154 that in an ACL for RCPT (for example), you can examine exactly what was
4157 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4158 commands, but it was not correctly comparing the address with the actual
4159 client host address. Thus, it would show the EHLO address in Received:
4160 header lines when this was not necessary.
4162 PH/27 Added the % operator to ${eval:}.
4164 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4165 it should be ignoring failures (because with -C, for example, it has lost
4166 privilege). It wasn't ignoring creation failures other than "already
4169 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4172 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4173 because an input line was too long, either on its own, or by virtue of
4174 too many continuations, the temporary file was not being removed, and the
4175 return code was incorrect.
4177 PH/31 Missing "BOOL" in function definition in filtertest.c.
4179 PH/32 Applied Sieve patches from the maintainer.
4181 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4183 PH/33 Added "verify = not_blind".
4185 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4186 Local/Makefile (with some defaults set). These are used in built scripts
4187 such as exicyclog, but they have never been used in the exim_install
4188 script (though there are many overriding facilities there). I have
4189 arranged that the exim_install script now takes note of these two
4192 PH/35 Installed configuration files for Dragonfly.
4194 PH/36 When a locally submitted message by a trusted user did not contain a
4195 From: header, and the sender address was obtained from -f or from an SMTP
4196 MAIL command, and the trusted user did not use -F to supply a sender
4197 name, $originator_name was incorrectly used when constructing a From:
4198 header. Furthermore, $originator_name was used for submission mode
4199 messages from external hosts without From: headers in a similar way,
4200 which is clearly wrong.
4202 PH/37 Added control=suppress_local_fixups.
4204 PH/38 When log_selector = +received_sender was set, and the addition of the
4205 sender made the log line's construction buffer exactly full, or one byte
4206 less than full, an overflow happened when the terminating "\n" was
4209 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4210 when the result of a list match is failure because a DNS lookup failed.
4212 PH/40 RM_COMMAND is now used in the building process.
4214 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4215 the "build-* directories that it finds.
4217 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4218 address in a domain literal was a prefix of an interface address.
4220 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4221 when verifying a sender address, unless rewrite_headers is false.
4223 PH/44 Wrote a long comment about why errors_to addresses are verified as
4224 recipients, not senders.
4226 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4227 the ratelimit ACL was added.
4229 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4231 PH/46 Added extra information about PostgreSQL errors to the error string.
4233 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4234 avoiding the need to install special zones in a real server. This is
4235 backwards compatible; if it can't find the fake resolver, it drops back.
4236 Thus, both old and new test suites can be run.
4238 TF/02 Added util/ratelimit.pl
4240 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4241 clock is set back in time.
4243 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4244 Candler <B.Candler@pobox.com>.
4246 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4247 OK for addresses that are the result of redirections.
4249 PH/48 A number of further additions for the benefit of the new test suite,
4250 including a fake gethostbyname() that interfaces to the fake DNS resolver
4253 TF/06 The fix for widen_domains has also been applied to qualify_single and
4254 search_parents which are the other dnslookup options that can cause
4257 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4260 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4262 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4263 service" if it encountered an MX record with an empty target hostname.
4264 The message is now "an MX or SRV record indicated no SMTP service".
4266 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4267 if the DNS of the sending site is misconfigured. This is quite a
4268 common situation. This change restores the behaviour of treating a
4269 helo verification defer as a failure.
4271 PH/51 If self=fail was set on a router, the bounce message did not include the
4272 actual error message.
4278 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4280 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4281 command itself ended in error, the underlying message about the transport
4282 filter timeout was being overwritten with the pipe command error. Now the
4283 underlying error message should be appended to the second error message.
4285 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4287 PH/02 Reduce the amount of output that "make" produces by default. Full output
4288 can still be requested.
4290 PH/03 The warning log line about a condition test deferring for a "warn" verb
4291 was being output only once per connection, rather than after each
4292 occurrence (because it was using the same function as for successful
4293 "warn" verbs). This seems wrong, so I have changed it.
4295 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4296 it should not have, which might have caused a crash in the right
4297 circumstances, but probably never did.
4299 PH/04 Installed a modified version of Tony Finch's patch to make submission
4300 mode fix the return path as well as the Sender: header line, and to
4301 add a /name= option so that you can make the user's friendly name appear
4304 TF/03 Added the control = fakedefer ACL modifier.
4306 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4307 Mark Lowes for thorough testing.
4309 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4311 TK/03 Merged latest SRS patch from Miles Wilton.
4313 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4314 with the definition in sysexits.h (which is #included earlier).
4315 Fortunately, Exim does not actually use EX_OK. The code used to try to
4316 preserve the sysexits.h value, by assuming that macro definitions were
4317 scanned for macro replacements. I have been disabused of this notion,
4318 so now the code just undefines EX_OK before #including unistd.h.
4320 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4321 in the smtp transport. When a block could not be written in a single
4322 write() function, the timeout was being re-applied to each part-write.
4323 This seems wrong - if the receiver was accepting one byte at a time it
4324 would take for ever. The timeout is now adjusted when this happens. It
4325 doesn't have to be particularly precise.
4327 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4328 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4330 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4331 without a domain if the check to <postmaster@domain> fails.
4333 SC/01 Eximstats: added -xls and the ability to specify output files
4334 (patch written by Frank Heydlauf).
4336 SC/02 Eximstats: use FileHandles for outputting results.
4338 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4340 SC/04 Eximstats: fixed display of large numbers with -nvr option
4342 SC/05 Eximstats: fixed merging of reports with empty tables.
4344 SC/06 Eximstats: added the -include_original_destination flag
4346 SC/07 Eximstats: removed tabs and trailing whitespace.
4348 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4350 TK/06 MBOX spool code: Add real "From " MBOX separator line
4351 so the .eml file is really in mbox format (even though
4352 most programs do not really care). Patch from Alex Miller.
4354 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4355 The latter is generated from $received_to and is only set if the
4356 message has one envelope recipient. SA can use these headers,
4357 obviously out-of-the-box. Patch from Alex Miller.
4359 PH/08 The ${def test on a variable was returning false if the variable's
4360 value was "0", contrary to what the specification has always said!
4361 The result should be true unless the variable is empty.
4363 PH/09 The syntax error of a character other than { following "${if
4364 def:variable_name" (after optional whitespace) was not being diagnosed.
4365 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4366 accidental colon was present, for example, could give incorrect results.
4368 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4369 result is used (not including appendfile, where other changes are about
4372 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4373 This involved changing a lot of size variables from int to off_t. It
4374 should work with maildirs and everything.
4376 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4377 spamd dying while we are connected to it.
4379 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4382 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4383 function for BDB 4.3.
4385 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4387 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4388 the sources for PCRE have been re-arranged and more files are now
4391 PH/15 The code I had for printing potentially long long variables in PH/11
4392 above was not the best (it lost precision). The length of off_t variables
4393 is now inspected at build time, and an appropriate printing format (%ld
4394 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4395 to be "long long int" or "long int". This is needed for the internal
4396 formatting function string_vformat().
4398 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4399 the configuration file to be ":syslog", then the script "guesses" where
4400 the logs files are, rather than using the compiled in default. In our
4401 case the guess is not the same as the compiled default, so the script
4402 suddenly stopped working when I started to use syslog. The patch checks
4403 to see if log_file_path is "". If so, it attempts to read it from exim
4404 with no configuration file to get the compiled in version, before it
4405 falls back to the previous guessing code."
4407 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4408 implementing BATV in an Exim configuration. See NewStuff for the gory
4411 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4412 Makefile that are specific to HP-UX.
4414 PH/18 If the "use_postmaster" option was set for a recipient callout together
4415 with the "random" option, the postmaster address was used as the MAIL
4416 FROM address for the random test, but not for the subsequent recipient
4417 test. It is now used for both.
4419 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4420 patch removes a few documentation additions to RFC 3028, because the
4421 latest draft now contains them. It adds the new en;ascii-case comparator
4422 and a new error check for 8bit text in MIME parts. Comparator and
4423 require names are now matched exactly. I enabled the subaddress
4424 extension, but it is not well tested yet (read: it works for me)."
4426 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4427 rework some of the code of TK/09 above to avoid the hardwired use of
4428 "%lld" and "long long". Replaced the call to snprintf() with a call to
4431 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4432 records point to non-existent hosts", "retry timeout exceeded", and
4433 "retry time not reached for any host after a long failure period".
4435 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4436 experimental DomainKeys support:
4438 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4439 (2) On an error such as an illegally used "control", the wrong name for
4440 the control was given.
4442 These problems did NOT occur unless DomainKeys support was compiled.
4444 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4446 PH/24 Added ${if match_ip condition.
4448 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4449 databases so that it will be absolutely obvious if a crash occurs in the
4450 DB library. This is a regular occurrence (often caused by mis-matched
4453 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4454 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4455 picked up on a user's system that detects such things. There doesn't seem
4456 to be a gcc warning option for this - only an attribute that has to be
4457 put on the function's prototype. It seems that in Fedora Core 4 they have
4458 set this on a number of new functions. No doubt there will be more in due
4461 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4462 specify a transport. However, if an address that was verified by such a
4463 router was the subject of a callout, Exim crashed because it tried to
4464 read the rcpt_include_affixes from the non-existent transport. Now it
4465 just assumes that the setting of that option is false. This bug was
4466 introduced by 4.51/PH/31.
4468 PH/28 Changed -d+all to exclude +memory, because that information is very
4469 rarely of interest, but it makes the output a lot bigger. People tend to
4470 do -d+all out of habit.
4472 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4473 code in os-type was giving problems when libc.so lives in lib64, like on
4476 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4477 aren't the modern standard, and it seems that some systems' include files
4478 don't always have them. Exim was already checking for some of the newer
4479 ones like T_AAAA, and defining it itself. I've added checks for all the
4480 record types that Exim uses.
4482 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4483 not automatically generating a new one, as it is supposed to. This
4484 prevented TLS from working. If the file did exist, but contained invalid
4485 data, a new version was generated, as expected. It was only the case of a
4486 non-existent file that was broken.
4488 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4489 with a change in libdomainkeys > 0.64.
4491 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4492 from DNS. If the selector record carries the flag, it now has
4493 precedence over the domain-wide flag.
4495 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4497 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4498 the use of a port name that isn't defined in /etc/services) occurred, the
4499 message was deferred as in a normal delivery, and thus remained on the
4500 spool, instead of being failed because of the mua_wrapper setting. This
4501 is now fixed, and I tidied up some of the mua_wrapper messages at the
4504 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4505 the messages in a hash of arrays rather than using individual hashes.
4506 This is a bit cleaner and results in dramatic memory savings, albeit
4507 at a slight CPU cost.
4509 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4510 as requested by Marc Sherman.
4512 SC/10 Eximstats: added histograms for user specified patterns as requested
4515 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4517 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4518 fopen() in the content-scanning modules that did not already have it.
4524 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4525 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4527 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4529 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4531 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4532 to test Sieve filters that use "vacation".
4534 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4535 that changes the way the GnuTLS parameters are stored in the cache file.
4536 The new format can be generated externally. For backward compatibility,
4537 if the data in the cache doesn't make sense, Exim assumes it has read an
4538 old-format file, and it generates new data and writes a new file. This
4539 means that you can't go back to an older release without removing the
4542 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4543 work if there are any delivery delays because "one_time" forces the
4544 parent to be marked "delivered", so its unseen clone is never tried
4545 again. For this reason, Exim now forbids the simultaneous setting of
4548 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4549 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4550 entry if you want to know the details. The fix, however, neglected to
4551 consider the case when local delivery batching is involved. The test for
4552 "previously delivered" was not happening when checking to see if an
4553 address could be batched with a previous (undelivered) one; under
4554 certain circumstances this could lead to multiple deliveries to the same
4557 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4558 in its include files, and this causes problems building Exim.
4560 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4561 header_syntax) but Exim was just ignoring anything given after a slash.
4562 In particular, this caused confusion with an attempt to use "verify =
4563 reverse_host_lookup/defer_ok". An error is now given when options are
4564 supplied for verify items that do not have them. (Maybe reverse_host_
4565 lookup should have a defer_ok option, but that's a different point.)
4567 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4568 defined by RFC 821) to 2048, because there were problems with some AUTH
4569 commands, and RFC 1869 says the size should be increased for extended
4570 SMTP commands that take arguments.
4572 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4575 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4576 "unknown" error; now it says that the functionality isn't in the binary.
4578 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4579 an address' error message when a string expansion fails (syntax or
4580 whatever). Otherwise the password may appear in the log. Following change
4581 PH/42 below, there is no longer a chance of it appearing in a bounce
4584 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4586 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4587 of its addresses was ever tried. (Bugzilla bug #2.)
4589 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4590 the result incorrectly in the debug output. (It correctly added a newline
4591 to what was transported.)
4593 TF/01 Added $received_time.
4595 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4596 commented out examples of how to interface to a virus scanner and to
4597 SpamAssassin. Also added commented examples of av_scanner and
4598 spamd_address settings.
4600 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4601 and controls are allowed in which ACLs. There were a couple of minor
4602 errors. Some of the entries in the conditions table (which is a table of
4603 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4604 negation of where the condition IS allowed.
4606 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4608 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4609 header file does not have a version number, so I've had to invent a new
4610 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4611 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4612 radiusclient), but it was contributed by a Radius user.
4614 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4615 files or directories, for OpenSSL.
4617 PH/19 When an Exim process that is running as root has to create an Exim log
4618 file, it does so in a subprocess that runs as exim:exim so as to get the
4619 ownership right at creation (otherwise, other Exim processes might see
4620 the file with the wrong ownership). There was no test for failure of this
4621 fork() call, which would lead to the process getting stuck as it waited
4622 for a non-existent subprocess. Forks do occasionally fail when resources
4623 run out. I reviewed all the other calls to fork(); they all seem to check
4626 PH/20 When checking for unexpected SMTP input at connect time (before writing
4627 the banner), Exim was not dealing correctly with a non-positive return
4628 from the read() function. If the client had disconnected by this time,
4629 the result was a log entry for a synchronization error with an empty
4630 string after "input=" when read() returned zero. If read() returned -1
4631 (an event I could not check), uninitialized data bytes were printed.
4632 There were reports of junk text (parts of files, etc) appearing after
4635 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4637 PH/22 Added support for macro redefinition, and (re)definition in between
4638 driver and ACL definitions.
4640 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4641 forgetting to use the resulting value; it was using the unexpanded value.
4643 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4644 hadn't been configured. The fix is from Juergen Kreileder, who
4645 understands it better than I do:
4647 "Here's what I see happening with three configured cyrus_sasl
4648 authenticators configured (plain, login, cram-md5):
4650 On startup auth_cyrus_sasl_init() gets called for each of these.
4651 This means three calls to sasl_listmech() without a specified mech_list.
4652 => SASL tests which mechs of all available mechs actually work
4653 => three warnings about OTP not working
4654 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4656 With the patch, sasl_listmech() also gets called three times. But now
4657 SASL's mech_list option is set to the server_mech specified in the the
4658 authenticator. Or in other words, the answer from sasl_listmech()
4659 gets limited to just the mech you're testing for (which is different
4661 => the return list contains just 'plain' or 'login', 'cram-md5' or
4662 nothing depending on the value of ob->server_mech.
4664 I've just tested the patch: Authentication still works fine,
4665 unavailable mechs specified in the exim configuration are still
4666 caught, and the auth.log warnings about OTP are gone."
4668 PH/25 When debugging is enabled, the contents of the command line are added
4669 to the debugging output, even when log_selector=+arguments is not
4672 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4673 answer is "GNU", and only if the return is "GNU/something" is the answer
4676 PH/27 $acl_verify_message is now set immediately after the failure of a
4677 verification in an ACL, and so is available in subsequent modifiers. In
4678 particular, the message can be preserved by coding like this:
4680 warn !verify = sender
4681 set acl_m0 = $acl_verify_message
4683 Previously, $acl_verify_message was set only while expanding "message"
4684 and "log_message" when a very denied access.
4686 PH/28 Modified OS/os.c-Linux with
4688 -#ifndef OS_LOAD_AVERAGE
4689 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4691 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4692 nomenclature these days.)
4694 PH/29 Installed patch from the Sieve maintainer that adds the options
4695 sieve_useraddress and sieve_subaddress to the redirect router.
4697 PH/30 In these circumstances:
4698 . Two addresses routed to the same list of hosts;
4699 . First host does not offer TLS;
4700 . First host accepts first address;
4701 . First host gives temporary error to second address;
4702 . Second host offers TLS and a TLS session is established;
4703 . Second host accepts second address.
4704 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4705 and peerdn, if requested) that were in fact used only for the second
4708 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4709 attention to any local part prefix or suffix that was matched by the
4710 router that accepted the address. It now behaves in the same way as it
4711 does for delivery: the affixes are removed from the local part unless
4712 rcpt_include_affixes is set on the transport.
4714 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4715 timeout during the DATA phase of an incoming message.
4717 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4718 applied a patch sanctioned by the Sieve maintainer.
4720 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4721 the uid or gid is negative. A case of a negative gid caused this to be
4722 noticed. The fix allows for either to be negative.
4724 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4725 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4728 PH/36 The change PH/12 above was broken. Fixed it.
4730 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4731 the grounds that routing the same address twice would always produce the
4732 same answer. This might have been true once, but it is certainly no
4733 longer true now. Routing a child address may depend on the previous
4734 routing that produced that child. Some complicated redirection strategies
4735 went wrong when messages had multiple recipients, and made Exim's
4736 behaviour dependent on the order in which the addresses were given.
4738 I have moved the duplicate checking until after the routing is complete.
4739 Exim scans the addresses that are assigned to local and remote
4740 transports, and removes any duplicates. This means that more work will be
4741 done, as duplicates will always all be routed, but duplicates are
4742 presumably rare, so I don't expect this is of any significance.
4744 For deliveries to pipes, files, and autoreplies, the duplicate checking
4745 still happens during the routing process, since they are not going to be
4748 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4749 It corrects a timeout issue with spamd. This is Ian's comment: "The
4750 background is that sometimes spamd either never reads data from a
4751 connection it has accepted, or it never writes response data. The exiscan
4752 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4753 blindly assumes that writes won't block so it may never time out."
4755 PH/39 Allow G after quota size as well as K and M.
4757 PH/40 The value set for $authenticated_id in an authenticator may not contain
4758 binary zeroes or newlines because the value is written to log lines and
4759 to spool files. There was no check on this. Now the value is run through
4760 the string_printing() function so that such characters are converted to
4761 printable escape sequences.
4763 PH/41 $message_linecount is a new variable that contains the total number of
4764 lines in the message. Compare $body_linecount, which is the count for the
4767 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4768 bounce and delay warning messages, except in certain special cases, which
4771 (a) An SMTP error message from a remote host;
4772 (b) A message specified in a :fail: redirection;
4773 (c) A message specified in a "fail" command in a system filter;
4774 (d) A message specified in a FAIL return from the queryprogram router;
4775 (e) A message specified by the cannot_route_message router option.
4777 In these cases only, Exim does include the error details in bounce and
4778 warning messages. There are also a few cases where bland messages such
4779 as "unrouteable address" or "local delivery error" are given.
4781 PH/43 $value is now also set for the "else" part of a ${run expansion.
4783 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4784 being worked on, but at least Exim now implements the latest version to
4787 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4788 process to complete was treated as a delivery failure, a timeout while
4789 writing the message to the pipe was logged, but erroneously treated as a
4790 successful delivery. Such timeouts include transport filter timeouts. For
4791 consistency with the overall process timeout, these timeouts are now
4792 treated as errors, giving rise to delivery failures by default. However,
4793 there is now a new Boolean option for the pipe transport called
4794 timeout_defer, which, if set TRUE, converts the failures into defers for
4795 both kinds of timeout. A transport filter timeout is now identified in
4798 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4799 systems where "make" and "gmake" are different, calling "gmake" at top
4800 level broke things. I've arranged for the value of $(MAKE) to be passed
4801 from the Makefile to this script so that it can call the same version of
4805 A note about Exim versions 4.44 and 4.50
4806 ----------------------------------------
4808 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4809 changes of various kinds. As a consequence, a big documentation update was
4810 needed. This delayed the release for rather longer than seemed good, especially
4811 in the light of a couple of (minor) security issues. Therefore, the changes
4812 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4813 release. So 4.44 and 4.50 are in effect two different branches that both start
4816 I have left the 4.50 change log unchanged; it contains all the changes since
4817 4.43. The change log for 4.44 is below; many of its items are identical to
4818 those for 4.50. This seems to be the most sensible way to preserve the
4819 historical information.
4825 1. Minor wording change to the doc/README.SIEVE file.
4827 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4828 computation of the current number of files was incorrect.
4830 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4831 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4834 4. Give more explanation in the error message when the command for a transport
4835 filter fails to execute.
4837 5. There are several places where Exim runs a non-Exim command in a
4838 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4839 was being done only for the command run by the queryprogram router. It is
4840 now done for all such subprocesses. The other cases are: ${run, transport
4841 filters, and the commands run by the lmtp and pipe transports.
4843 6. Added CONFIGURE_GROUP build-time option.
4845 7. Some older OS have a limit of 256 on the maximum number of file
4846 descriptors. Exim was using setrlimit() to set 1000 as a large value
4847 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4848 systems. I've change it so that if it can't get 1000, it tries for 256.
4850 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4851 was an oversight, and furthermore, ever since the addition of extra
4852 controls (e.g. 4.43/32), the checks on when to allow different forms of
4853 "control" were broken. There should now be diagnostics for all cases when a
4854 control that does not make sense is encountered.
4856 9. Added the /retain_sender option to "control=submission".
4858 10. $recipients is now available in the predata ACL (oversight).
4860 11. Tidy the search cache before the fork to do a delivery from a message
4861 received from the command line. Otherwise the child will trigger a lookup
4862 failure and thereby defer the delivery if it tries to use (for example) a
4863 cached ldap connection that the parent has called unbind on.
4865 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4866 of $address_data from the recipient verification was clobbered by the
4867 sender verification.
4869 13. The value of address_data from a sender verification is now available in
4870 $sender_address_data in subsequent conditions in the ACL statement.
4872 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4874 15. Added a new option "connect=<time>" to callout options, to set a different
4877 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4878 was its contents. (It was OK if the option was not defined at all.)
4880 17. A "Completed" log line is now written for messages that are removed from
4881 the spool by the -Mrm option.
4883 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4884 information about exactly what failed.
4886 19. Added -dd to debug only the daemon process.
4888 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4889 handles timeouts, both on the server side and network timeouts. Renamed the
4890 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4892 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4893 It is now set to "smtps".
4895 22. $host_address is now set to the target address during the checking of
4896 ignore_target_hosts.
4898 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4899 being passed; this would have caused $sender_host_name to have been used if
4900 matching the list had actually called for a host name (not very likely,
4901 since this list is usually IP addresses). A host name is now passed as
4904 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4905 code that specifies a non-restarting handler (typically sigaction() in
4906 modern systems) in an attempt to fix a rare and obscure crash bug.
4908 25. Narrowed the window for a race in the daemon that could cause it to ignore
4909 SIGCHLD signals. This is not a major problem, because they are used only to
4910 wake it up if nothing else does.
4912 26. A malformed maildirsize file could cause Exim to calculate negative values
4913 for the mailbox size or file count. Odd effects could occur as a result.
4914 The maildirsize information is now recalculated if the size or filecount
4917 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4918 support for a long time. Removed HAVE_SYS_VFS_H.
4920 28. Installed the latest version of exipick from John Jetmore.
4922 29. In an address list, if the pattern was not a regular expression, an empty
4923 subject address (from a bounce message) matched only if the pattern was an
4924 empty string. Non-empty patterns were not even tested. This was the wrong
4925 because it is perfectly reasonable to use an empty address as part of a
4926 database query. An empty address is now tested by patterns that are
4927 lookups. However, all the other forms of pattern expect the subject to
4928 contain a local part and a domain, and therefore, for them, an empty
4929 address still always fails if the pattern is not itself empty.
4931 30. Exim went into a mad DNS loop when attempting to do a callout where the
4932 host was specified on an smtp transport, and looking it up yielded more
4933 than one IP address.
4935 31. Re-factored the code for checking spool and log partition space into a
4936 function that finds that data and another that does the check. The former
4937 is then used to implement four new variables: $spool_space, $log_space,
4938 $spool_inodes, and $log_inodes.
4940 32. The RFC2047 encoding function was originally intended for short strings
4941 such as real names; it was not keeping to the 75-character limit for
4942 encoded words that the RFC imposes. It now respects the limit, and
4943 generates multiple encoded words if necessary. To be on the safe side, I
4944 have increased the buffer size for the ${rfc2047: expansion operator from
4947 33. It is now permitted to omit both strings after an "if" condition; if the
4948 condition is true, the result is "true". As before, when the second string
4949 is omitted, a false condition yields an empty string. This makes it less
4950 cumbersome to write custom ACL and router conditions.
4952 34. Failure to deliver a bounce message always caused it to be frozen, even if
4953 there was an errors_to setting on the router. The errors_to setting is now
4956 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4957 canonical form (fully expanded) before being placed in
4958 $sender_host_address.
4960 36. The table in the code that translates DNS record types into text (T_A to
4961 "A" for instance) was missing entries for NS and CNAME. It is just possible
4962 that this could have caused confusion if both these types were looked up
4963 for the same domain, because the text type is used as part of Exim's
4964 per-process caching. But the chance of anyone hitting this buglet seems
4967 37. The dnsdb lookup has been extended in a number of ways.
4969 (1) There is a new type, "zns", which walks up the domain tree until it
4970 finds some nameserver records. It should be used with care.
4972 (2) There is a new type, "mxh", which is like "mx" except that it returns
4973 just the host names, not the priorities.
4975 (3) It is now possible to give a list of domains (or IP addresses) to be
4976 looked up. The behaviour when one of the lookups defers can be
4977 controlled by a keyword.
4979 (4) It is now possible to specify the separator character for use when
4980 multiple records are returned.
4982 38. The dnslists ACL condition has been extended: it is now possible to supply
4983 a list of IP addresses and/or domains to be looked up in a particular DNS
4986 39. Added log_selector=+queue_time_overall.
4988 40. When running the queue in the test harness, wait just a tad after forking a
4989 delivery process, to get repeatability of debugging output.
4991 41. Include certificate and key file names in error message when GnuTLS fails
4992 to set them up, because the GnuTLS error message doesn't include the name
4993 of the failing file when there is a problem reading it.
4995 42. Allow both -bf and -bF in the same test run.
4997 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4999 44. The "Exiscan patch" is now merged into the mainline Exim source.
5001 45. Sometimes the final signoff response after QUIT could fail to get
5002 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5003 < 0 before doing a fflush(). This bug looks as though it goes back to the
5004 introduction of TLS in release 3.20, but "sometimes" must have been rare
5005 because the tests only now provoked it.
5007 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5008 (this can affect the format of dates).
5010 47. exim_tidydb, when checking for the continued existence of a message for
5011 which it has found a message-specific retry record, was not finding
5012 messages that were in split spool directories. Consequently, it was
5013 deleting retry records that should have stayed in existence.
5015 48. Steve fixed some bugs in eximstats.
5017 49. The SPA authentication driver was not abandoning authentication and moving
5018 on to the next authenticator when an expansion was forced to fail,
5019 contradicting the general specification for all authenticators. Instead it
5020 was generating a temporary error. It now behaves as specified.
5022 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5023 (the order specifies the preference for clients). The order is now AES256,
5024 AES128, 3DES, ARCFOUR128.
5026 51. Small patch to Sieve code - explicitly set From: when generating an
5029 52. Exim crashed if a remote delivery caused a very long error message to be
5030 recorded - for instance if somebody sent an entire SpamAssassin report back
5031 as a large number of 550 error lines. This bug was coincidentally fixed by
5032 increasing the size of one of Exim's internal buffers (big_buffer) that
5033 happened as part of the Exiscan merge. However, to be on the safe side, I
5034 have made the code more robust (and fixed the comments that describe what
5037 53. Now that there can be additional text after "Completed" in log lines (if
5038 the queue_time_overall log selector is set), a one-byte patch to exigrep
5039 was needed to allow it to recognize "Completed" as not the last thing in
5042 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5043 patch that reportedly fixes this has been added. I am not expert enough to
5044 create a test for it. This is what the patch creator wrote:
5046 "I found a little strange behaviour of ldap code when working with
5047 Windows 2003 AD Domain, where users was placed in more than one
5048 Organization Units. When I tried to give exim partial DN, the exit code
5049 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5050 But simultaneously result of request was absolutely normal ldap result,
5051 so I produce this patch..."
5053 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5054 REFERENCE, so I have modified the code to exclude the patch when that macro
5057 55. Some experimental protocols are using DNS PTR records for new purposes. The
5058 keys for these records are domain names, not reversed IP addresses. The
5059 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5060 leaves it alone. Component reversal etc. now happens only for IP addresses.
5063 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5065 57. Double the size of the debug message buffer (to 2048) so that more of very
5066 long debug lines gets shown.
5068 58. The exicyclog utility now does better if the number of log files to keep
5069 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5071 59. Two changes related to the smtp_active_hostname option:
5073 (1) $smtp_active_hostname is now available as a variable.
5074 (2) The default for smtp_banner uses $smtp_active_hostname instead
5075 of $primary_hostname.
5077 60. The host_aton() function is supposed to be passed a string that is known
5078 to be a valid IP address. However, in the case of IPv6 addresses, it was
5079 not checking this. This is a hostage to fortune. Exim now panics and dies
5080 if the condition is not met. A case was found where this could be provoked
5081 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5082 components; fortuitously, this particular loophole had already been fixed
5083 by change 4.50/55 above.
5085 If there are any other similar loopholes, the new check in host_aton()
5086 itself should stop them being exploited. The report I received stated that
5087 data on the command line could provoke the exploit when Exim was running as
5088 exim, but did not say which command line option was involved. All I could
5089 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5090 running as the user.
5093 61. There was a buffer overflow vulnerability in the SPA authentication code
5094 (which came originally from the Samba project). I have added a test to the
5095 spa_base64_to_bits() function which I hope fixes it.
5098 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5099 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5101 63. The daemon start-up calls getloadavg() while still root for those OS that
5102 need the first call to be done as root, but it missed one case: when
5103 deliver_queue_load_max is set with deliver_drop_privilege. This is
5104 necessary for the benefit of the queue runner, because there is no re-exec
5105 when deliver_drop_privilege is set.
5107 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5108 This has been fixed.
5110 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5111 was in use, was not putting the data itself into the right store pool;
5112 consequently, it could be overwritten for a subsequent message in the same
5113 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5116 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5118 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5119 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5120 the function were treating the return as a boolean value, which happened to
5121 work because 0=false and not-0=true, but is not correct code.
5123 68. The host_aton() function was not handling scoped IPv6 addresses (those
5124 with, for example, "%eth0" on the end) correctly.
5126 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5127 negated items (that is, ~something) in unsigned ints. Some compilers
5128 apparently mutter when there is no cast.
5130 70. If an address verification called from an ACL failed, and did not produce a
5131 user-specific message (i.e. there was only a "system" message), nothing was
5132 put in $acl_verify_message. In this situation, it now puts the system
5135 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5136 session; change 4.31/43 added the unwanted input to the log line - except
5137 that it did not do this in the start of session case. It now does.
5139 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5140 This is wrong and can cause the other end to generate a synchronization
5141 error if it is another Exim or anything else that does the synchronization
5142 check. A QUIT command is no longer sent after a timeout.
5144 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5145 during host lookups.
5147 74. The defer_ok option of callout verification was not working if it was used
5148 when verifying addresses in header lines, that is, for this case:
5150 verify = header_sender/callout=defer_ok
5152 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5153 those file descriptors could be used for SMTP connections. If anything
5154 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5155 could be sent to the SMTP client, causing chaos. The daemon now opens
5156 stdin, stdout, and stderr to /dev/null when it puts itself into the
5159 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5160 log by default. The user can override this with suitable Perl magic.
5162 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5163 the log message when discard triggers, was not working for the DATA ACL or
5164 for the non-SMTP ACL.
5166 78. Error message wording change in sieve.c.
5168 79. If smtp_accept_max_per_host was set, the number of connections could be
5169 restricted to fewer than expected, because the daemon was trying to set up
5170 a new connection before checking whether the processes handling previous
5171 connections had finished. The check for completed processes is now done
5172 earlier. On busy systems, this bug wouldn't be noticed because something
5173 else would have woken the daemon, and it would have reaped the completed
5176 80. If a message was submitted locally by a user whose login name contained one
5177 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5178 It caused a spool format error. I have fixed the spool reading code. A
5179 related problem was that the "from" clause in the Received: line became
5180 illegal because of the space(s). It is now covered by ${quote_local_part.
5182 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5185 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5187 83. Patch from Sieve maintainer to fix unterminated string problem in
5188 "vacation" handling.
5190 84. Some minor changes to the Linux configuration files to help with other
5191 OS variants using glibc.
5193 85. One more patch for Sieve to update vacation handling to latest spec.
5196 ----------------------------------------------------
5197 See the note above about the 4.44 and 4.50 releases.
5198 ----------------------------------------------------
5204 1. Change 4.43/35 introduced a bug that caused file counts to be
5205 incorrectly computed when quota_filecount was set in an appendfile
5208 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5209 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5212 3. Give more explanation in the error message when the command for a transport
5213 filter fails to execute.
5215 4. There are several places where Exim runs a non-Exim command in a
5216 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5217 was being done only for the command run by the queryprogram router. It is
5218 now done for all such subprocesses. The other cases are: ${run, transport
5219 filters, and the commands run by the lmtp and pipe transports.
5221 5. Some older OS have a limit of 256 on the maximum number of file
5222 descriptors. Exim was using setrlimit() to set 1000 as a large value
5223 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5224 systems. I've change it so that if it can't get 1000, it tries for 256.
5226 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5227 was an oversight, and furthermore, ever since the addition of extra
5228 controls (e.g. 4.43/32), the checks on when to allow different forms of
5229 "control" were broken. There should now be diagnostics for all cases when a
5230 control that does not make sense is encountered.
5232 7. $recipients is now available in the predata ACL (oversight).
5234 8. Tidy the search cache before the fork to do a delivery from a message
5235 received from the command line. Otherwise the child will trigger a lookup
5236 failure and thereby defer the delivery if it tries to use (for example) a
5237 cached ldap connection that the parent has called unbind on.
5239 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5240 of $address_data from the recipient verification was clobbered by the
5241 sender verification.
5243 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5244 was its contents. (It was OK if the option was not defined at all.)
5246 11. A "Completed" log line is now written for messages that are removed from
5247 the spool by the -Mrm option.
5249 12. $host_address is now set to the target address during the checking of
5250 ignore_target_hosts.
5252 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5253 being passed; this would have caused $sender_host_name to have been used if
5254 matching the list had actually called for a host name (not very likely,
5255 since this list is usually IP addresses). A host name is now passed as
5258 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5259 code that specifies a non-restarting handler (typically sigaction() in
5260 modern systems) in an attempt to fix a rare and obscure crash bug.
5262 15. Narrowed the window for a race in the daemon that could cause it to ignore
5263 SIGCHLD signals. This is not a major problem, because they are used only to
5264 wake it up if nothing else does.
5266 16. A malformed maildirsize file could cause Exim to calculate negative values
5267 for the mailbox size or file count. Odd effects could occur as a result.
5268 The maildirsize information is now recalculated if the size or filecount
5271 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5272 support for a long time. Removed HAVE_SYS_VFS_H.
5274 18. Updated exipick to current release from John Jetmore.
5276 19. Allow an empty sender to be matched against a lookup in an address list.
5277 Previously the only cases considered were a regular expression, or an
5280 20. Exim went into a mad DNS lookup loop when doing a callout where the
5281 host was specified on the transport, if the DNS lookup yielded more than
5284 21. The RFC2047 encoding function was originally intended for short strings
5285 such as real names; it was not keeping to the 75-character limit for
5286 encoded words that the RFC imposes. It now respects the limit, and
5287 generates multiple encoded words if necessary. To be on the safe side, I
5288 have increased the buffer size for the ${rfc2047: expansion operator from
5291 22. Failure to deliver a bounce message always caused it to be frozen, even if
5292 there was an errors_to setting on the router. The errors_to setting is now
5295 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5296 canonical form (fully expanded) before being placed in
5297 $sender_host_address.
5299 24. Updated eximstats to version 1.33
5301 25. Include certificate and key file names in error message when GnuTLS fails
5302 to set them up, because the GnuTLS error message doesn't include the name
5303 of the failing file when there is a problem reading it.
5305 26. Expand error message when OpenSSL has problems setting up cert/key files.
5308 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5309 (this can affect the format of dates).
5311 28. exim_tidydb, when checking for the continued existence of a message for
5312 which it has found a message-specific retry record, was not finding
5313 messages that were in split spool directories. Consequently, it was
5314 deleting retry records that should have stayed in existence.
5316 29. eximstats updated to version 1.35
5317 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5318 1.35 - bugfix such that pie charts by volume are generated correctly
5320 30. The SPA authentication driver was not abandoning authentication and moving
5321 on to the next authenticator when an expansion was forced to fail,
5322 contradicting the general specification for all authenticators. Instead it
5323 was generating a temporary error. It now behaves as specified.
5325 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5326 (the order specifies the preference for clients). The order is now AES256,
5327 AES128, 3DES, ARCFOUR128.
5329 31. Small patch to Sieve code - explicitly set From: when generating an
5332 32. Exim crashed if a remote delivery caused a very long error message to be
5333 recorded - for instance if somebody sent an entire SpamAssassin report back
5334 as a large number of 550 error lines. This bug was coincidentally fixed by
5335 increasing the size of one of Exim's internal buffers (big_buffer) that
5336 happened as part of the Exiscan merge. However, to be on the safe side, I
5337 have made the code more robust (and fixed the comments that describe what
5340 33. Some experimental protocols are using DNS PTR records for new purposes. The
5341 keys for these records are domain names, not reversed IP addresses. The
5342 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5343 leaves it alone. Component reversal etc. now happens only for IP addresses.
5346 34. The host_aton() function is supposed to be passed a string that is known
5347 to be a valid IP address. However, in the case of IPv6 addresses, it was
5348 not checking this. This is a hostage to fortune. Exim now panics and dies
5349 if the condition is not met. A case was found where this could be provoked
5350 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5351 components; fortuitously, this particular loophole had already been fixed
5352 by change 4.50/55 or 4.44/33 above.
5354 If there are any other similar loopholes, the new check in host_aton()
5355 itself should stop them being exploited. The report I received stated that
5356 data on the command line could provoke the exploit when Exim was running as
5357 exim, but did not say which command line option was involved. All I could
5358 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5359 running as the user.
5362 35. There was a buffer overflow vulnerability in the SPA authentication code
5363 (which came originally from the Samba project). I have added a test to the
5364 spa_base64_to_bits() function which I hope fixes it.
5367 36. The daemon start-up calls getloadavg() while still root for those OS that
5368 need the first call to be done as root, but it missed one case: when
5369 deliver_queue_load_max is set with deliver_drop_privilege. This is
5370 necessary for the benefit of the queue runner, because there is no re-exec
5371 when deliver_drop_privilege is set.
5373 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5374 was in use, was not putting the data itself into the right store pool;
5375 consequently, it could be overwritten for a subsequent message in the same
5376 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5379 38. Sometimes the final signoff response after QUIT could fail to get
5380 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5381 < 0 before doing a fflush(). This bug looks as though it goes back to the
5382 introduction of TLS in release 3.20, but "sometimes" must have been rare
5383 because the tests only now provoked it.
5389 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5390 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5391 Now it returns an integer. A number of calls were still expecting a T/F
5392 return. Fortuitously, in all cases, the tests worked in OK situations,
5393 which is the norm. However, things would have gone wrong on any write
5394 failures on the smtp file descriptor. This function is used when sending
5395 messages over SMTP and also when doing verify callouts.
5397 2. When Exim is called to do synchronous delivery of a locally submitted
5398 message (the -odf or -odi options), it no longer closes stderr before doing
5401 3. Implemented the mua_wrapper option.
5403 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5405 5. Implemented the functions header_remove(), header_testname(),
5406 header_add_at_position(), and receive_remove_recipient(), and exported them
5409 6. If an ACL "warn" statement specified the addition of headers, Exim already
5410 inserted X-ACL-Warn: at the start if there was no header name. However, it
5411 was not making this test for the second and subsequent header lines if
5412 there were newlines in the string. This meant that an invalid header could
5413 be inserted if Exim was badly configured.
5415 7. Allow an ACL "warn" statement to add header lines at the start or after all
5416 the Received: headers, as well as at the end.
5418 8. Added the rcpt_4xx retry error code.
5420 9. Added postmaster_mailfrom=xxx to callout verification option.
5422 10. Added mailfrom=xxxx to the callout verification option, for verify=
5425 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5426 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5428 12. Inserted some casts to stop certain compilers warning when using pointer
5429 differences as field lengths or precisions in printf-type calls (mostly
5430 affecting debugging statements).
5432 13. Added optional readline() support for -be (dynamically loaded).
5434 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5435 same clock tick as a message's arrival, so that its received time was the
5436 same as the "first fail" time on the retry record, and that message
5437 remained on the queue past the ultimate address timeout, every queue runner
5438 would try a delivery (because it was past the ultimate address timeout) but
5439 after another failure, the ultimate address timeout, which should have then
5440 bounced the address, did not kick in. This was a "< instead of <=" error;
5441 in most cases the first failure would have been in the next clock tick
5442 after the received time, and all would be well.
5444 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5445 being recognized when the domain list was tested by the match_domain
5446 condition in an expansion string.
5448 16. Added the ${str2b64: operator.
5450 17. Exim was always calling setrlimit() to set a large limit for the number of
5451 processes, without checking whether the existing limit was already
5452 adequate. (It did check for the limit on file descriptors.) Furthermore,
5453 errors from getrlimit() and setrlimit() were being ignored. Now they are
5454 logged to the main and panic logs, but Exim does carry on, to try to do its
5455 job under whatever limits there are.
5457 18. Imported PCRE 5.0.
5459 19. Trivial typo in log message " temporarily refused connection" (the leading
5462 20. If the log selector return_path_on_delivery was set and an address was
5463 redirected to /dev/null, the delivery process crashed because it assumed
5464 that a return path would always be set for a "successful" delivery. In this
5465 case, the whole delivery is bypassed as an optimization, and therefore no
5468 21. Internal re-arrangement: the function for sending a challenge and reading
5469 a response while authentication was assuming a zero-terminated challenge
5470 string. It's now changed to take a pointer and a length, to allow for
5471 binary data in such strings.
5473 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5475 23. Exim was not respecting finduser_retries when seeking the login of the
5476 uid under which it was called; it was always trying 10 times. (The default
5477 setting of finduser_retries is zero.) Also, it was sleeping after the final
5478 failure, which is pointless.
5480 24. Implemented tls_on_connect_ports.
5482 25. Implemented acl_smtp_predata.
5484 26. If the domain in control=submission is set empty, Exim assumes that the
5485 authenticated id is a complete email address when it generates From: or
5486 Sender: header lines.
5488 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5489 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5490 chown and chgrp in /bin and hostname in /usr/bin.
5492 28. Exim was keeping the "process log" file open after each use, just as it
5493 does for the main log. This opens the possibility of it remaining open for
5494 long periods when the USR1 signal hits a daemon. Occasional processlog
5495 errors were reported, that could have been caused by this. Anyway, it seems
5496 much more sensible not to leave this file open at all, so that is what now
5499 29. The long-running daemon process does not normally write to the log once it
5500 has entered its main loop, and it closes the log before doing so. This is
5501 so that log files can straightforwardly be renamed and moved. However,
5502 there are a couple of unusual error situations where the daemon does write
5503 log entries, and I had neglected to close the log afterwards.
5505 30. The text of an SMTP error response that was received during a remote
5506 delivery was being truncated at 512 bytes. This is too short for some of
5507 the long messages that one sometimes sees. I've increased the limit to
5510 31. It is now possible to make retry rules that apply only when a message has a
5511 specific sender, in particular, an empty sender.
5513 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5514 it possible to be selective about when SMTP synchronization is enforced.
5516 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5518 32. Implemented hosts_connection_nolog.
5520 33. Added an ACL for QUIT.
5522 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5525 35. Added mailbox_size and mailbox_filecount to appendfile.
5527 36. Added control = no_multiline_responses to ACLs.
5529 37. There was a bug in the logic of the code that waits for the clock to tick
5530 in the case where the clock went backwards by a substantial amount such
5531 that the microsecond fraction of "now" was more than the microsecond
5532 fraction of "then" (but the whole seconds number was less).
5534 38. Added support for the libradius Radius client library this is found on
5535 FreeBSD (previously only the radiusclient library was supported).
5541 1. When certain lookups returned multiple values in the form name=value, the
5542 quoting of the values was not always being done properly. Specifically:
5543 (a) If the value started with a double quote, but contained no whitespace,
5545 (b) If the value contained whitespace other than a space character (i.e.
5546 tabs or newlines or carriage returns) it was not quoted.
5547 This fix has been applied to the mysql and pgsql lookups by writing a
5548 separate quoting function and calling it from the lookup code. The fix
5549 should probably also be applied to nisplus, ibase and oracle lookups, but
5550 since I cannot test any of those, I have not disturbed their existing code.
5552 2. A hit in the callout cache for a specific address caused a log line with no
5553 reason for rejecting RCPT. Now it says "Previous (cached) callout
5554 verification failure".
5556 3. There was an off-by-one bug in the queryprogram router. An over-long
5557 return line was truncated at 256 instead of 255 characters, thereby
5558 overflowing its buffer with the terminating zero. As well as fixing this, I
5559 have increased the buffer size to 1024 (and made a note to document this).
5561 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5562 when Exim is waiting for an SMTP response from a remote server, Exim
5563 restarts its select() call on the socket, thereby resetting its timeout.
5564 This is not a problem when such interrupts are rare. Somebody set up a cron
5565 job to run exiwhat every 2 minutes, which is less than the normal select()
5566 timeout (5 or 10 minutes). This meant that the select() timeout never
5567 kicked in because it was always reset. I have fixed this by comparing the
5568 time when an interrupt arrives with the time at the start of the first call
5569 to select(). If more time than the timeout has elapsed, the interrupt is
5570 treated as a timeout.
5572 5. Some internal re-factoring in preparation for the addition of Sieve
5573 extensions (by MH). In particular, the "personal" test is moved to a
5574 separate function, and given an option for scanning Cc: and Bcc: (which is
5575 not set for Exim filters).
5577 6. When Exim created an email address using the login of the caller as the
5578 local part (e.g. when creating a From: or Sender: header line), it was not
5579 quoting the local part when it contained special characters such as @.
5581 7. Installed new OpenBSD configuration files.
5583 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5584 try to make them clearer.
5586 9. Callout options, other than the timeout value, were being ignored when
5587 verifying sender addresses in header lines. For example, when using
5589 verify = header_sender/callout=no_cache
5591 the cache was (incorrectly) being used.
5593 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5594 only the Cygwin environment.
5596 11. When return_path_on_delivery was set as a log selector, if different remote
5597 addresses in the same message used different return paths and parallel
5598 remote delivery occurred, the wrong values would sometimes be logged.
5599 (Whenever a remote delivery process finished, the return path value from
5600 the most recently started remote delivery process was logged.)
5602 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5603 lines when AUTH and/or TLS are in use. This is the "received protocol"
5604 field. Exim used to use "asmtp" for authenticated SMTP, without any
5605 indication (in the protocol name) for TLS use. Now it follows the RFC and
5606 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5607 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5608 names appear in log lines as well as in Received: header lines.
5610 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5611 extensions, and comparison tests, and to fix some bugs.
5613 14. Changes to the "personal" filter test:
5615 (1) The test was buggy in that it was just doing the equivalent of
5616 "contains" tests on header lines. For example, if a user's address was
5617 anne@some.where, the "personal" test would incorrectly be true for
5619 To: susanne@some.where
5621 This test is now done by extracting each address from the header in turn,
5622 and checking the entire address. Other tests that are part of "personal"
5623 are now done using regular expressions (for example, to check local parts
5624 of addresses in From: header lines).
5626 (2) The list of non-personal local parts in From: addresses has been
5627 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5628 taken from the Sieve specification recommendations.
5630 (3) If the message contains any header line starting with "List-" it is
5631 treated as non-personal.
5633 (4) The test for "circular" in the Subject: header line has been removed
5634 because it now seems ill-conceived.
5636 15. Minor typos in src/EDITME comments corrected.
5638 16. Installed latest exipick from John Jetmore.
5640 17. If headers_add on a router specified a text string that was too long for
5641 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5642 of string_sprintf() is now avoided.
5644 18. $message_body_size was not set (it was always zero) when running the DATA
5645 ACL and the local_scan() function.
5647 19. For the "mail" command in an Exim filter, no default was being set for
5648 the once_repeat time, causing a random time value to be used if "once" was
5649 specified. (If the value happened to be <= 0, no repeat happened.) The
5650 default is now 0s, meaning "never repeat". The "vacation" command was OK
5651 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5652 (I found it when inspecting the code).
5654 20. There is now an overall timeout for performing a callout verification. It
5655 defaults to 4 times the callout timeout, which applies to individual SMTP
5656 commands during the callout. The overall timeout applies when there is more
5657 than one host that can be tried. The timeout is checked before trying the
5658 next host. This prevents very long delays if there are a large number of
5659 hosts and all are timing out (e.g. when the network connections are timing
5660 out). The value of the overall timeout can be changed by specifying an
5661 additional sub-option for "callout", called "maxwait". For example:
5663 verify = sender/callout=5s,maxwait=20s
5665 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5666 to the end before writing, but this should make it even safer).
5668 22. Exim was forgetting that it had advertised PIPELINING for the second and
5669 subsequent messages on an SMTP connection. It was also not resetting its
5670 memory on STARTTLS and an internal HELO.
5672 23. When Exim logs an SMTP synchronization error within a session, it now
5673 records whether PIPELINING has been advertised or not.
5675 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5676 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5677 rather than long int.
5679 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5681 26. Added the never_mail option to autoreply.
5687 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5688 crash if the getsockname() call failed; this can happen if a connection is
5689 closed very soon after it is established. The problem was simply in the
5690 order in which certain operations were done, causing Exim to try to write
5691 to the SMTP stream before it had set up the file descriptor. The bug has
5692 been fixed by making things happen in the correct order.
5698 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5699 before the connection was closed, thus losing the rejection response.
5701 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5702 some early Solaris releases, but causes trouble in current releases where
5703 socklen_t is defined.
5705 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5708 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5711 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5712 that releasing the top of it at the end releases what was used for sub-
5713 expansions (unless the block got too big). However, discard this block if
5714 the first thing is a variable or header, so that we can use its block when
5715 it is dynamic (useful for very large $message_headers, for example).
5717 6. Lookups now cache *every* query, not just the most recent. A new, separate
5718 store pool is used for this. It can be recovered when all lookup caches are
5719 flushed. Lookups now release memory at the end of their result strings.
5720 This has involved some general refactoring of the lookup sources.
5722 7. Some code has been added to the store_xxx() functions to reduce the amount
5723 of flapping under certain conditions.
5725 8. log_incoming_interface used to affect only the <= reception log lines. Now
5726 it causes the local interface and port to be added to several more SMTP log
5727 lines, for example "SMTP connection from", and rejection lines.
5729 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5731 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5733 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5734 could be overwritten at the end of the current message (or the start of a
5735 new message if it was set in a HELO ACL). The value is now preserved for
5736 the duration of the SMTP connection.
5738 12. If a transport had a headers_rewrite setting, and a matching header line
5739 contained an unqualified address, that address was qualified, even if it
5740 did not match any rewriting rules. The underlying bug was that the values
5741 of the flags that permit the existence of unqualified sender and recipient
5742 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5743 non-local messages, and by -bnq for local messages) were not being
5744 preserved with the message after it was received.
5746 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5747 "next input=" as part of the text comprising the host identity instead of
5748 the correct text. The code was using the same buffer for two different
5749 strings. However, depending on which order the printing function evaluated
5750 its arguments, the bug did not always show up. Under Linux, for example, my
5751 test suite worked just fine.
5753 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5754 doesn't work with some older versions of Perl. It has been changed to "my",
5755 which in any case is probably the better facility to use.
5757 15. A really picky compiler found some instances of statements for creating
5758 error messages that either had too many or two few arguments for the format
5761 16. The size of the buffer for calls to the DNS resolver has been increased
5762 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5763 for addresses that have a lot of PTR records. This alleviates a problem; it
5764 does not fully solve it.
5766 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5767 buffer now truncates the list and logs the incident, which is the same
5768 action as happens when Exim is looking up a host name and its aliases.
5769 Previously in this situation something unpredictable would happen;
5770 sometimes it was "internal error: store_reset failed".
5772 18. If a server dropped the connection unexpectedly when an Exim client was
5773 using GnuTLS and trying to read a response, the client delivery process
5774 crashed while trying to generate an error log message.
5776 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5777 string, for example:
5779 warn message = H1: something\nH2: something
5781 the text was added as a single header line from Exim's point of view
5782 though it ended up OK in the delivered message. However, searching for the
5783 second and subsequent header lines using $h_h2: did not work. This has been
5784 fixed. Similarly, if a system filter added multiple headers in this way,
5785 the routers could not see them.
5787 20. Expanded the error message when iplsearch is called with an invalid key to
5788 suggest using net-iplsearch in a host list.
5790 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5791 ACLs are no longer actually imposed (and a message to that effect is
5794 22. If a "gecos" field in a passwd entry contained escaped characters, in
5795 particular, if it contained a \" sequence, Exim got it wrong when building
5796 a From: or a Sender: header from that name. A second bug also caused
5797 incorrect handling when an unquoted " was present following a character
5798 that needed quoting.
5800 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5801 was not being matched caselessly.
5803 24. Arranged for all hyphens in the exim.8 source to be escaped with
5806 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5807 properly. Recipient callout cache records were still being keyed to include
5808 the sender, even when use_sender was set false. This led to far more
5809 callouts that were necessary. The sender is no longer included in the key
5810 when use_sender is false.
5812 26. Added "control = submission" modifier to ACLs.
5814 27. Added the ${base62d: operator to decode base 62 numbers.
5816 28. dnsdb lookups can now access SRV records.
5818 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5819 the configuration file.
5821 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5822 (-v) mode. This makes the output for a verbose queue run more intelligible.
5824 31. Added a use_postmaster feature to recipient callouts.
5826 32. Added the $body_zerocount variable, containing the number of binary zero
5827 bytes in the message body.
5829 33. The time of last modification of the "new" subdirectory is now used as the
5830 "mailbox time last read" when there is a quota error for a maildir
5833 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5835 35. Added +ignore_unknown as a special item in host lists.
5837 36. Code for decoding IPv6 addresses in host lists is now included, even if
5838 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5839 address was recognized as an IP address, but was then not correctly decoded
5840 into binary, causing unexpected and incorrect effects when compared with
5847 1. Very minor rewording of debugging text in manualroute to say "list of
5848 hosts" instead of "hostlist".
5850 2. If verify=header_syntax was set, and a header line with an unqualified
5851 address (no domain) and a large number of spaces between the end of the
5852 name and the colon was received, the reception process suffered a buffer
5853 overflow, and (when I tested it) crashed. This was caused by some obsolete
5854 code that should have been removed. The fix is to remove it!
5856 3. When running in the test harness, delay a bit after writing a bounce
5857 message to get a bit more predictability in the log output.
5859 4. Added a call to search_tidyup() just before forking a reception process. In
5860 theory, someone could use a lookup in the expansion of smtp_accept_max_
5861 per_host which, without the tidyup, could leave open a database connection.
5863 5. Added the variables $recipient_data and $sender_data which get set from a
5864 lookup success in an ACL "recipients" or "senders" condition, or a router
5865 "senders" option, similar to $domain_data and $local_part_data.
5867 6. Moved the writing of debug_print from before to after the "senders" test
5870 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5871 problems for message scanning, either using a data ACL, or using
5872 local_scan() because the Received: header was not generated till after they
5873 were called (in order to set the time as the time of reception completion).
5874 I have revised the way this works. The header is now generated after the
5875 body is received, but before the ACL or local_scan() are called. After they
5876 are run, the timestamp in the header is updated.
5882 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5883 before starting a queue runner without re-exec. This happened only when
5884 deliver_drop_privilege was set or when the Exim user was set to root. The
5885 effect of the bug was that timeouts during subsequent deliveries caused
5886 crashes instead of being properly handled. The handler is now left at its
5887 default (and expected) setting.
5889 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5890 message, again when deliver_drop_privilege is set or Exim is run as root.
5891 The bug described in (1) was not present in this case, but the tidying up
5892 of the other signals was missing. I have made the two cases consistent.
5894 3. The ignore_target_hosts setting on a manualroute router was being ignored
5895 for hosts that were looked up using the /MX notation.
5897 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5900 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5901 operated on the sender address. After changing the $sender_address to <>
5902 for the sender address verify, Exim was re-instated it as the original
5903 (before rewriting) address, but remembering that it had rewritten it, so it
5904 wasn't rewriting it again. This bug also had the effect of breaking the
5905 sender address verification caching when the sender address was rewritten.
5907 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5908 This has been changed so that if the ip literal address matches
5909 ignore_target_hosts, the router declines.
5911 7. Added expansion conditions match_domain, match_address, and match_local_
5912 part (NOT match_host).
5914 8. The placeholder for the Received: header didn't have a length field set.
5916 9. Added code to Exim itself and to exim_lock to test for a specific race
5917 condition that could lead to file corruption when using MBX delivery. The
5918 issue is with the lockfile that is created in /tmp. If this file is removed
5919 after a process has opened it but before that process has acquired a lock,
5920 there is the potential for a second process to recreate the file and also
5921 acquire a lock. This could lead to two Exim processes writing to the file
5922 at the same time. The added code performs the same test as UW imapd; it
5923 checks after acquiring the lock that its file descriptor still refers to
5924 the same named file.
5926 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5927 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5930 11. Added the smtp_active_hostname option. If used, this will typically be made
5931 to depend on the incoming interface address. Because $interface_address is
5932 not set up until the daemon has forked a reception process, error responses
5933 that can happen earlier (such as "too many connections") no longer contain
5936 12. If an expansion in a condition on a "warn" statement fails because a lookup
5937 defers, the "warn" statement is abandoned, and the next ACL statement is
5938 processed. Previously this caused the whole ACL to be aborted.
5940 13. Added the iplsearch lookup type.
5942 14. Added ident_timeout as a log selector.
5944 15. Added tls_certificate_verified as a log selector.
5946 16. Added a global option tls_require_ciphers (compare the smtp transport
5947 option of the same name). This controls incoming TLS connections.
5949 17. I finally figured out how to make tls_require_ciphers do a similar thing
5950 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5951 before starting the TLS session.
5953 18. Tabs are now shown as \t in -bP output.
5955 19. If the log selector return_path_on_delivery was set, Exim crashed when
5956 bouncing a message because it had too many Received: header lines.
5958 20. If two routers both had headers_remove settings, and the first one included
5959 a superfluous trailing colon, the final name in the first list and the
5960 first name in the second list were incorrectly joined into one item (with a
5961 colon in the middle).
5967 1. Added -C and -D options to the exinext utility, mainly to make it easier
5968 to include in the automated testing, but these could be helpful when
5969 multiple configurations are in use.
5971 2. The exinext utility was not formatting the output nicely when there was
5972 an alternate port involved in the retry record key, nor when there was a
5973 message id as well (for retries that were specific to a specific message
5974 and a specific host). It was also confused by IPv6 addresses, because of
5975 the additional colons they contain. I have fixed the IPv4 problem, and
5976 patched it up to do a reasonable job for IPv6.
5978 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5979 delivery, the log line now contains "pipelined" if PIPELINING was used.
5981 4. An SMTP transport process used to panic and die if the bind() call to set
5982 an explicit outgoing interface failed. This has been changed; it is now
5983 treated in the same way as a connect() failure.
5985 5. A reference to $sender_host_name in the part of a conditional expansion
5986 that was being skipped was still causing a DNS lookup. This no longer
5989 6. The def: expansion condition was not recognizing references to header lines
5990 that used bh_ and bheader_.
5992 7. Added the _cache feature to named lists.
5994 8. The code for checking quota_filecount in the appendfile transport was
5995 allowing one more file than it should have been.
5997 9. For compatibility with Sendmail, the command line option
6005 and sets the incoming protocol and host name (for trusted callers). The
6006 host name and its colon can be omitted when only the protocol is to be set.
6007 Note the Exim already has two private options, -pd and -ps, that refer to
6008 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6009 "s", but I don't think that's a major issue.
6011 10. A number of refactoring changes to the code, none of which should affect
6014 (a) The number of logging options was getting close to filling up the
6015 32-bit word that was used as a bit map. I have split them into two classes:
6016 those that are passed in the argument to log_write(), and those that are
6017 only ever tested independently outside of that function. These are now in
6018 separate 32-bit words, so there is plenty of room for expansion again.
6019 There is no change in the user interface or the logging behaviour.
6021 (b) When building, for example, log lines, the code previously used a
6022 macro that called string_cat() twice, in order to add two strings. This is
6023 not really sufficiently general. Furthermore, there was one instance where
6024 it was actually wrong because one of the argument was used twice, and in
6025 one call a function was used. (As it happened, calling the function twice
6026 did not affect the overall behaviour.) The macro has been replaced by a
6027 function that can join an arbitrary number of extra strings onto a growing
6030 (c) The code for expansion conditions now uses a table and a binary chop
6031 instead of a serial search (which was left over from when there were very
6032 few conditions). Also, it now recognizes conditions like "pam" even when
6033 the relevant support is not compiled in: a suitably worded error message is
6034 given if an attempt is made to use such a condition.
6036 11. Added ${time_interval:xxxxx}.
6038 12. A bug was causing one of the ddress fields not to be passed back correctly
6039 from remote delivery subprocesses. The field in question was not being
6040 subsequently used, so this caused to problems in practice.
6042 13. Added new log selectors queue_time and deliver_time.
6044 14. Might have fixed a bug in maildirsizefile handling that threw up
6045 "unexpected character" debug warnings, and recalculated the data
6046 unnecessarily. In any case, I expanded the warning message to give more
6049 15. Added the message "Restricted characters in address" to the statements in
6050 the default ACL that block characters like @ and % in local parts.
6052 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6053 Three changes have been made:
6055 (a) There was a serious bug; a negative response to MAIL caused the whole
6056 recipient domain to be cached as invalid, thereby blocking all messages
6057 to all local parts at the same domain, from all senders. This bug has
6058 been fixed. The domain is no longer cached after a negative response to
6059 MAIL if the sender used is not empty.
6061 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6064 (c) A new callout option, "use_sender" has been added for people who want
6065 the modified behaviour.
6071 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6074 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6075 indeed breaks things for older releases.
6077 3. Added additional logging to the case where there is a problem reading data
6078 from a filter that is running in a subprocess using a pipe, in order to
6079 try to track down a specific problem.
6081 4. Testing facility fudge: when running in the test harness and attempting
6082 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6083 getting "No route to host". Convert this to a timeout.
6085 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6088 6. Some OS don't have socklen_t but use size_t instead. This affects the
6089 fifth argument of getsockopt() amongst other things. This is now
6090 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6091 can be set for individual OS. I have set it for SunOS5, OSF1, and
6092 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6093 some earlier ones do not.
6095 7. Change 4.30/15 was not doing the test caselessly.
6097 8. The standard form for an IPv6 address literal was being rejected by address
6098 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6099 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6100 this, as well as the form without the "IPv6" on the front (but only when
6101 address literals are enabled, of course).
6103 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6105 10. Exim crashed if a message with an empty sender address specified by -f
6106 encountered a router with an errors_to setting. This could be provoked only
6107 by a command such as
6111 where an empty string was supplied; "<>" did not hit this bug.
6113 11. Installed PCRE release 4.5.
6115 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6116 remained set. It is now erased.
6118 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6119 times from message ids (which are base 36 rather than the normal 62).
6121 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6122 were being counted as actual protocol errors, and logged if the log
6123 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6124 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6125 and DATA following a set of rejected RCPTs do not count as protocol errors.
6126 In other words, Exim assumes they were pipelined, though this may not
6127 actually be the case. Of course, in all cases the client gets an
6128 appropriate error code.
6130 15. If a lookup fails in an ACL condition, a message about the failure may
6131 be available; it is used if testing the ACL cannot continue, because most
6132 such messages specify what the cause of the deferral is. However, some
6133 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6134 that caused an old message to be retained and used if a later statement
6135 caused a defer, replacing the real cause of the deferral.
6137 16. If an IP address had so many PTR records that the DNS lookup buffer
6138 was not large enough to hold them, Exim could crash while trying to process
6139 the truncated data. It now detects and logs this case.
6141 17. Further to 4.21/58, another change has been made: if (and only if) the
6142 first line of a message (the first header line) ends with CRLF, a bare LF
6143 in a subsequent header line has a space inserted after it, so as not to
6144 terminate the header.
6146 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6147 unnecessarily, used atoi() instead of strtol(), and didn't check the
6148 termination when getting file sizes from file names by regex.
6150 19. Completely re-implemented the support for maildirsize files, in the light
6151 of a number of problems with the previous contributed implementation
6152 (4.30/29). In particular:
6154 . If the quota is zero, the maildirsize file is maintained, but no quota is
6157 . If the maildir directory does not exist, it is created before any attempt
6158 to write a maildirsize file.
6160 . The quota value in the file is just a cache; if the quota is changed in
6161 the transport, the new value overrides.
6163 . A regular expression is available for excluding directories from the
6166 20. The autoreply transport checks the characters in options that define the
6167 message's headers; it allows continued headers, but it was checking with
6168 isspace() after an embedded newline instead of explicitly looking for a
6171 21. If all the "regular" hosts to which an address was routed had passed their
6172 expiry times, and had not reached their retry times, the address was
6173 bounced, even if fallback hosts were defined. Now Exim should go on to try
6176 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6177 equivalent code in the SMTP transport. Some hosts send humungous responses
6178 to HELO/EHLO, more than 1024 it seems.
6180 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6181 gives compiler warnings in some environments. I've now done it "properly",
6184 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6185 (because of problems with the built-in one) was declared to return uschar *
6186 instead of char *, causing compiler failure.
6188 25. Fixed a file descriptor leak when processing alias/forward files.
6190 26. Fixed a minor format string issue in dbfn.c.
6192 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6194 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6195 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6198 29. When a sender address is verified, it is cached, to save repeating the test
6199 when there is more than one recipient in a message. However, when the
6200 verification involves a callout, it is possible for different callout
6201 options to be set for different recipients. It is too complicated to keep
6202 track of this in the cache, so now Exim always runs a verification when a
6203 callout is required, relying on the callout cache for the optimization.
6204 The overhead is duplication of the address routing, but this should not be
6207 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6208 to be verified with callout=postmaster, and the main callout worked but the
6209 postmaster check failed, the verification correctly failed. However, if a
6210 subsequent RCPT command asked for sender verification *without* the
6211 postmaster check, incorrect caching caused this verification also to fail,
6214 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6215 it was not caching the DNS options (qualify_single, search_parents) that
6216 were used when the lookup failed. A subsequent lookup with different
6217 options therefore always gave the same answer, though there were cases
6218 where it should not have. (Example: a "domains = !$mx_any" option on a
6219 dnslookup router: the "domains" option is always processed without any
6220 widening, but the router might have qualify_single set.) Now Exim uses the
6221 cached value only when the same options are set.
6223 32. Added John Jetmore's "exipick" utility to the distribution.
6225 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6226 than a timeout (e.g. a certificate is required, and is not provided), an
6227 Exim server now closes the connection immediately. Previously it waited for
6228 the client to close - but if the client is SSL, it seems that they each
6229 wait for each other, leading to a delay before one of them times out.
6231 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6232 maintained 0.8.x compatibility because I don't think many are using it, and
6233 it is clearly obsolete.
6235 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6238 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6239 client certificate was expired. A simple patch fixes this, though I don't
6240 understand the full logic of why the verify callback is called multiple
6243 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6244 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6245 which causes problems with some clients (such as the Certicom SSL Plus
6246 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6247 disables the coutermeasure allowing Eudora to connect."
6249 38. Exim was not checking that a write() to a log file succeeded. This could
6250 lead to Bad Things if a log got too big, in particular if it hit a file
6251 size limit. Exim now panics and dies if it cannot write to a log file, just
6252 as it does if it cannot open a log file.
6254 39. Modified OS/Makefile-Linux so that it now contains
6256 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6258 The two -D definitions ensure that Exim is compiled with large file
6259 support, which makes it possible to handle log files that are bigger than
6262 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6263 instance) a domain was checked against a named list that involved a lookup,
6264 causing $domain_data to be set, then another domain was checked against the
6265 same list, then the first domain was re-checked, the value of $domain_data
6266 after the final check could be wrong. In particular, if the second check
6267 failed, it could be set empty. This bug probably also applied to
6270 41. The strip_trailing_dot option was not being applied to the address given
6271 with the -f command-line option.
6273 42. The code for reading a message's header from the spool was incrementing
6274 $received_count, but never initializing it. This meant that the value was
6275 incorrect (doubled) while delivering a message in the same process in which
6276 it was received. In the most common configuration of Exim, this never
6277 happens - a fresh exec is done - but it can happen when
6278 deliver_drop_privilege is set.
6280 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6281 it now includes up to 150 characters of the unexpected data in the log
6284 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6285 and building data strings. The size of both of these buffers was 10 000
6286 bytes - far larger than anybody would *ever* want, thought I. Needless to
6287 say, somebody hit the limit. I have increased the maximum line length to
6288 20 000 and the maximum data length of concatenated lines to 100 000. I have
6289 also fixed two bugs, because there was no checking on these buffers. Tsk,
6290 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6291 buffer is too small.
6293 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6294 lsearch lookups. Now it does.
6296 46. When parsing a route_list item in a manualroute router, a fixed-length
6297 buffer was used for the list of hosts. I made this 1024 bytes long,
6298 thinking that nobody would ever have a list of hosts that long. Wrong.
6299 Somebody had a whole pile of complicated expansion conditions, and the
6300 string was silently truncated, leading to an expansion error. It turns out
6301 that it is easier to change to an unlimited length (owing to other changes
6302 that have happened since this code was originally written) than to build
6303 structure for giving a limitation error. The length of the item that
6304 expands into the list of hosts is now unlimited.
6306 47. The lsearch lookup could not handle data where the length of text line was
6307 more than 4095 characters. Such lines were truncated, leading to shortened
6308 data being returned. It should now handle lines of any length.
6310 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6311 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6314 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6315 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6316 no longer happens in comment lines. A list of replacements is now placed
6317 at the head of all of the source files, except those whose only change is
6318 to replace PERL_COMMAND in the very first #! line.
6320 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6321 messages on the queue, with a bottom-up merge sort, using code contributed
6322 by Michael Haardt. This should make operations like -bp somewhat faster on
6323 large queues. It won't affect queue runners, except when queue_run_in_order
6326 51. Installed eximstats 1.31 in the distribution.
6328 52. Added support for SRV lookups to the dnslookup router.
6330 53. If an ACL referred to $message_body or $message_body_end, the value was not
6331 reset for any messages that followed in the same SMTP session.
6333 54. The store-handling optimization for building very long strings was not
6334 differentiating between the different store pools. I don't think this
6335 actually made any difference in practice, but I've tidied it.
6337 55. While running the routers to verify a sender address, $sender_address
6338 was still set to the sender address. This is wrong, because when routing to
6339 send a bounce to the sender, it would be empty. Therefore, I have changed
6340 it so that, while verifying a sender address, $sender_address is set to <>.
6341 (There is no change to what happens when verifying a recipient address.)
6343 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6344 target A or AAAA records (if not already returned) without resetting the
6345 qualify_single or search_parents options of the DNS resolver. These are
6346 inappropriate in this case because the targets of MX and SRV records must
6347 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6348 target that, when qualified, matched something in the local domain. These
6349 two options are now turned off when doing these lookups.
6351 57. It seems that at least some releases of Reiserfs (which does not have the
6352 concept of a fixed number of inodes) returns zero and not -1 for the
6353 number of available inodes. This interacted badly with check_spool_inodes,
6354 which assumed that -1 was the "no such thing" setting. What I have done is
6355 to check that the total number of inodes is greater than zero before doing
6356 the test of how many are available.
6358 58. When a "warn" ACL statement has a log_message modifier, the message is
6359 remembered, and not repeated. This is to avoid a lot of repetition when a
6360 message has many recipients that cause the same warning to be written.
6361 However, Exim was preserving the list of already written lines for an
6362 entire SMTP session, which doesn't seem right. The memory is now reset if a
6363 new message is started.
6365 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6366 debugging output unless log_rewrite was also set.
6368 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6369 of (int)(handle) when we know that handle contains (void *)(-1).
6371 61. The Exim daemon panic-logs an error return when it closes the incoming
6372 connection. However "connection reset by peer" seems to be common, and
6373 isn't really an error worthy of noting specially, so that particular error
6376 62. When Exim is trying to find all the local interfaces, it used to panic and
6377 die if the ioctl to get the interface flags failed. However, it seems that
6378 on at least one OS (Solaris 9) it is possible to have an interface that is
6379 included in the list of interfaces, but for which you get a failure error
6380 for this call. This happens when the interface is not "plumbed" into a
6381 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6382 failure of the "get flags" call assumes that the interface is down.
6384 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6385 makes life easier for people who are doing arithmetic on fields extracted
6386 from dates, where you often get leading zeros that should not be
6387 interpreted as octal.
6389 64. Added qualify_domain to the redirect router, to override the global
6392 65. If a pathologically long header line contained very many addresses (the
6393 report of this problem mentioned 10 000) and each of them was rewritten,
6394 Exim could use up a very large amount of memory. (It kept on making new
6395 copies of the header line as it rewrote, and never released the old ones.)
6396 At the expense of a bit more processing, the header rewriting function has
6397 been changed so that it no longer eats memory in this way.
6399 66. The generation of the Received: header has been moved from the time that a
6400 message starts to be received, to the time that it finishes. The timestamp
6401 in the Received: header should now be very close to that of the <= log
6402 line. There are two side-effects of this change:
6404 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6405 logged header lines no longer include the local Received: line, because
6406 it has not yet been created. The same applies to a copy of the message
6407 that is returned to a non-SMTP sender when a message is rejected.
6409 (b) When a filter file is tested using -bf, no additional Received: header
6410 is added to the test message. After some thought, I decided that this
6413 This change does not affect the value of $received_for. It is still set
6414 after address rewriting, but before local_scan() is called.
6416 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6418 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6419 gave an unhelpful panic error message, and a defer error. I have managed to
6420 change this behaviour so that it now rejects any supplied certificate,
6421 which seems right, as the list of acceptable certificates is empty.
6423 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6424 gave an unhelpful defer error. I have not managed to make this reject any
6425 supplied certificates, but the error message it gives is "no certificate
6426 supplied", which is not helpful.
6428 70. exigrep's output now also includes lines that are not associated with any
6429 message, but which match the given pattern. Implemented by a patch from
6430 Martin Sluka, which also tidied up the Perl a bit.
6432 71. Recipient callout verification, like sender verification, was using <> in
6433 the MAIL FROM command. This isn't really the right thing, since the actual
6434 sender may affect whether the remote host accepts the recipient or not. I
6435 have changed it to use the actual sender in the callout; this means that
6436 the cache record is now keyed on a recipient/sender pair, not just the
6437 recipient address. There doesn't seem to be a real danger of callout loops,
6438 since a callout by the remote host to check the sender would use <>.
6439 [SEE ABOVE: changed after hitting problems.]
6441 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6442 temporary errors. However, in the case of such a code being given after
6443 the end of a data transmission (i.e. after ".") Exim was failing to write
6444 a retry record for the message. (Yes, there was some broken host that was
6445 actually sending 8xx at this point.)
6447 73. An unknown lookup type in a host list could cause Exim to panic-die when
6448 the list was checked. (An example that provoked this was putting <; in the
6449 middle of a list instead of at the start.) If this happened during a DATA
6450 ACL check, a -D file could be left lying around. This kind of configuration
6451 error no longer causes Exim to die; instead it causes a defer error. The
6452 incident is still logged to the main and panic logs.
6454 74. Buglet left over from Exim 3 conversion. The message "too many messages
6455 in one connection" was written to the rejectlog but not the mainlog, except
6456 when address rewriting (yes!) was being logged.
6458 75. Added write_rejectlog option.
6460 76. When a system filter was run not as root (that is, when system_filter_user
6461 was set), the values of the $n variables were not being returned to the
6462 main process; thus, they were not subsequently available in the $sn
6465 77. Added +return_path_on_delivery log selector.
6467 78. A connection timeout was being treated differently from recipients deferred
6468 when testing hosts_max_try with a message that was older than the host's
6469 retry timeout. (The host should not be counted, thus allowing all hosts to
6470 be tried at least once before bouncing.) This may have been the cause of an
6471 occasionally reported bug whereby a message would remain on the queue
6472 longer than the retry timeout, but would be bounced if a delivery was
6473 forced. I say "may" because I never totally pinned down the problem;
6474 setting up timeout/retry tests is difficult. See also the next item.
6476 79. The ultimate address timeout was not being applied to errors that involved
6477 a combination of host plus message (for example, a timeout on a MAIL
6478 command). When an address resolved to a number of possible hosts, and they
6479 were not all tried for each delivery (e.g. because of hosts_max_try), a
6480 message could remain on the queue longer than the retry timeout.
6482 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6485 81. Fixed an obscure SMTP outgoing bug which required at least the following
6486 conditions: (a) there was another message waiting for the same server;
6487 (b) the server returned 5xx to all RCPT commands in the first message so
6488 that the message was not completed; (c) the server dropped the connection
6489 or gave a negative response to the RSET that Exim sends to abort the
6490 transaction. The observed case was a dropped connection after DATA that had
6491 been sent in pipelining mode. That is, the server had advertised PIPELINING
6492 but was not implementing it correctly. The effect of the bug was incorrect
6493 behaviour, such as trying another host, and this could lead to a crash.
6499 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6500 and daemon.c were passed as pointers to ints; they should have been
6501 pointers to socklen_t variables (which are typically unsigned ints).
6503 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6506 3. Fixed a really odd bug that affected only the testing scheme; patching a
6507 certain fixed string in the binary changed the value of another string that
6508 happened to be identical to the end of the original first string.
6510 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6511 name", it returns that address as the IP address. On some operating
6512 systems (e.g. Solaris), it also passes back the IP address string as the
6513 "host name". However, on others (e.g. Linux), it passes back an empty
6514 string. Exim wasn't checking for this, and was changing the host name to an
6515 empty string, assuming it had been canonicalized.
6517 5. Although rare, it is permitted to have more than one PTR record for a given
6518 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6519 all the names associated with an address, because they do in Solaris.
6520 However, it seems that they do not in Linux for data that comes from the
6521 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6522 I found this out when I moved to a new Linux workstation and tried to run
6523 the Exim test suite.
6525 To get round this problem I have changed the code so that it now does its
6526 own call to the DNS to look up PTR records when searching for a host name.
6527 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6528 addresses that are only in /etc/hosts are still found.
6530 This behaviour is, however, controlled by an option called host_lookup_
6531 order, which defaults to "bydns:byaddr". If people want to use the other
6532 order, or indeed, just use one or the other means of lookup, they can
6533 specify it in this variable.
6535 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6536 some operating systems, this comes back from gethostbyaddr() as an empty
6537 string, and this is what Exim used to test for. However, it seems that in
6538 other systems, "." is yielded. Exim now tests for this case too.
6540 7. The values of check_spool_space and check_log_space are now held internally
6541 as a number of kilobytes instead of an absolute number of bytes. If a
6542 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6543 kilobyte. This means that much larger values can be stored.
6545 8. Exim monitor: an attempt to get the action menu when not actually pointing
6546 at a message produces an empty menu entitled "No message selected". This
6547 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6548 no entries in it ("Shell widget menu has zero width and/or height"). So I
6549 have added a single, blank menu entry in this case.
6551 9. Added ${quote_local_part.
6553 10. MIME decoding is now applied to the contents of Subject: header lines when
6556 11. Now that a reference to $sender_host_address automatically causes a reverse
6557 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6558 host lookup before query-style lookups in lists that might use this
6559 variable. This has therefore been abolished, and the "net-" prefix is no
6560 longer necessary for query-style lookups.
6562 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6563 have been a typo for LFLAGS, so it has been changed.
6565 13. The install script calls Exim with "-C /dev/null" in order to find the
6566 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6567 to be output. However, since Exim outputs its version number before the
6568 error, it didn't break the script. It just looked ugly. I fixed this by
6569 always allowing "-C /dev/null" if the caller is root.
6571 14. Ignore overlarge ACL variable number when reading spool file - insurance
6572 against a later release with more variables having written the file.
6574 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6575 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6576 this, as well as the form without the "IPv6" on the front.
6578 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6579 OS/Makefile-Darwin file.
6581 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6582 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6584 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6585 variable. However, some OS use ints for inodes. I've added cast to long int
6586 to get rid of the compiler warning.
6588 19. I had forgotten to lock out "/../" in configuration file names when
6589 ALT_CONFIG_PREFIX was set.
6591 20. Routers used for verification do not need to specify transports. However,
6592 if such a router generated a host list, and callout was configured, Exim
6593 crashed, because it could not find a port number from the (non-existent)
6594 transport. It now assumes port 25 in this circumstance.
6596 21. Added the -t option to exigrep.
6598 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6599 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6600 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6601 them is set, LOOKUP_LSEARCH is forced.
6603 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6605 24. Added sender and host information to the "rejected by local_scan()" log
6606 line; previously there was no indication of these.
6608 25. Added .include_if_exists.
6610 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6611 Linux. It turns out that not all file systems support this. Apparently some
6612 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6613 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6614 not supported on the file descriptor, is now ignored when Exim is trying to
6615 sync a directory. This applies only to Linux.
6617 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6619 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6620 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6623 29. Added support for maildirsize files from supplied patch (modified a bit).
6625 30. The use of :fail: followed by an empty string could lead Exim to respond to
6626 sender verification failures with (e.g.):
6628 550 Verification failed for <xxx>
6629 550 Sender verify failed
6631 where the first response line was missing the '-' that indicates it is not
6632 the final line of the response.
6634 31. The loop for finding the name of the user that called Exim had a hardwired
6635 limit of 10; it now uses the value of finduser_retries, which is used for
6636 all other user lookups.
6638 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6641 33. Exim was neglecting to zero errno before one call of strtol() when
6642 expanding a string and expecting an integer value. On some systems this
6643 resulted in spurious "integer overflow" errors. Also, it was casting the
6644 result into an int without checking.
6646 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6647 did not work. The code looks as if it has *never* worked, though it appears
6648 to have been documented since at least release 1.62. I have made it work.
6650 35. The "timeout_DNS" error in retry rules, also documented since at least
6651 1.62, also never worked. As it isn't clear exactly what this means, and
6652 clearly it isn't a major issue, I have abolished the feature by treating it
6653 as "timeout", and writing a warning to the main and panic logs.
6655 36. The display of retry rules for -brt wasn't always showing the error code
6658 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6659 timeout_connect_A, timeout_connect_MX.
6661 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6662 to the empty sender.
6664 39. The daemon was not analysing the content of -oX till after it had closed
6665 stderr and disconnected from the controlling terminal. This meant that any
6666 syntax errors were only noted on the panic log, and the return code from
6667 the command was 0. By re-arranging the code a little, I've made the
6668 decoding happen first, so such errors now appear on stderr, and the return
6669 code is 1. However, the actual setting up of the sockets still happens in
6670 the disconnected process, so errors there are still only recorded on the
6673 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6674 connections (as happens on some IP stacks) was logged at start up time as
6675 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6676 it from "IPv6 and IPv4", which means that two separate sockets are being
6679 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6680 says whether AF_INET or AF_INET6 was passed as an argument.
6682 42. Exiwhat output was messed up when time zones were included in log
6685 43. Exiwhat now gives more information about the daemon's listening ports,
6686 and whether -tls-on-connect was used.
6688 44. The "port" option of the smtp transport is now expanded.
6690 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6691 silently ignored. Now an error message is written to the main and panic
6694 46. There's a new ACL modifier called "logwrite" which writes to a log file
6695 as soon as it is encountered.
6697 47. Added $local_user_uid and $local_user_gid at routing time.
6699 48. Exim crashed when trying to verify a sender address that was being
6702 49. Exim was recognizing only a space character after ".include". It now also
6703 recognizes a tab character.
6705 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6706 extracting the relevant information from the specification. The man page no
6707 longer contains scrambled data for the -d option, and I've added a section
6708 at the front about calling Exim under different names.
6710 51. Added "extra_headers" argument to the "mail" command in filter files.
6712 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6715 53. Installed eximstats 1.29.
6717 54. Added transport_filter_timeout as a generic transport option.
6719 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6720 Cc: header lines. This was required by RFC 822, but it not required by RFC
6723 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6724 incoming messages that did not have them. Now it does so only if the
6725 message originates locally, that is, if there is no associated remote host
6726 address. When Resent- header lines are present, this applies to the Resent-
6727 lines rather than the non-Resent- lines.
6729 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6730 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6732 58. Messages for configuration errors now include the name of the main
6733 configuration file - useful now that there may be more than one file in a
6734 list (.included file names were always shown).
6736 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6737 for those rare installations that do not start the daemon as root or run it
6738 setuid root. I've cut out the call to initgroups() if the daemon is not
6741 60. The Exim user and group can now be bound into the binary as text strings
6742 that are looked up at the start of Exim's processing.
6744 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6746 62. Added $mailstore_basename variable.
6748 63. Installed patch to sieve.c from Michael Haardt.
6750 64. When Exim failed to open the panic log after failing to open the main log,
6751 the original message it was trying to log was written to stderr and debug
6752 output, but if they were not available (the usual case in production), it
6753 was lost. Now it is written to syslog before the two lines that record the
6754 failures to open the logs.
6756 65. Users' Exim filters run in subprocesses under the user's uid. It is
6757 possible for a "deliver" command or an alias in a "personal" command to
6758 provoke an address rewrite. If logging of address rewriting is configured,
6759 this fails because the process is not running as root or exim. There may be
6760 a better way of dealing with this, but for the moment (because 4.30 needs
6761 to be released), I have disabled address rewrite logging when running a
6762 filter in a non-root, non-exim process.
6768 1. The buildconfig auxiliary program wasn't quoting the value set for
6769 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6770 not defined. This bug was masked in 4.22 by the effect that was fixed in
6773 2. Some messages that were rejected after a message id was allocated were
6774 shown as "incomplete" by exigrep. It no longer does this for messages that
6775 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6777 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6778 have allow_domain_literals set, the ID did not get logged in the <= line.
6779 Domain literals are now always recognized in Message-ID: header lines.
6781 4. The first argument for a ${extract expansion item is the key name or field
6782 number. Leading and trailing spaces in this item were not being ignored,
6783 causing some misleading effects.
6785 5. When deliver_drop_privilege was set, single queue runner processes started
6786 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6787 same command in the process it spins off) were not dropping privilege.
6789 6. When the daemon running as "exim" started a queue runner, it always
6790 re-executed Exim in the spun-off process. This is a waste of effort when
6791 deliver_drop_privilege is set. The new process now just calls the
6792 queue-runner function directly.
6798 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6801 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6802 ignored. Though the use of -oP was forcing the writing of a pid file, it
6803 was always written to the default place.
6805 3. If the message "no IP address found for host xxxx" is generated during
6806 incoming verification, it is now followed by identification of the incoming
6807 connection (so you can more easily find what provoked it).
6809 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6811 5. Added some features to "harden" Exim a bit more against certain attacks:
6813 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6814 be put in Local/Makefile. This is like the never_users runtime option,
6815 but it cannot be overridden. The default setting is "root".
6817 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6818 prefix string with which any file named in a -C command line option
6821 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6822 is retained for -C and -D only if the caller of Exim is root. Without
6823 it, the exim user may also use -C and -D and retain privilege.
6825 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6826 command line option is disabled.
6828 6. Macro names set by the -D option must start with an upper case letter, just
6829 like macro names defined in the configuration file.
6831 7. Added "dereference=" facility to LDAP.
6833 8. Two instances of the typo "uknown" in the source files are fixed.
6835 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6836 the Configure-Makefile script screwed up while processing it.
6838 10. Incorporated PCRE 4.4.
6840 11. The SMTP synchronization check was not operating right at the start of an
6841 SMTP session. For example, it could not catch a HELO sent before the client
6842 waited for the greeting. There is now a check for outstanding input at the
6843 point when the greeting is written. Because of the duplex, asynchronous
6844 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6845 way, but not yet received, when the check is performed.
6847 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6848 on TCP/IP sockets, because this apparently causes some broken clients to
6851 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6852 unchanged) from the Cygwin maintainer.
6854 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6855 was supported instead of testing for mbx. Effectively a typo.
6857 15. The spa authenticator server code was not checking that the input it
6858 received was valid base64.
6860 16. The debug output line for the "set" modifier in ACLs was not showing the
6861 name of the variable that was being set.
6863 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6865 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6866 lookup on its own. Something else was needed to trigger the lookup. For
6867 example, a match in host_lookup or the need for a host name in a host list.
6868 Now, if $sender_host_name is referenced and the host name has not yet been
6869 looked up, a lookup is performed. If the lookup fails, the variable remains
6870 empty, and $host_lookup_failed is set to "1".
6872 19. Added "eqi" as a case-independent comparison operator.
6874 20. The saslauthd authentication condition could segfault if neither service
6875 nor realm was specified.
6877 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6878 error message that was logged was misleading, and incoming SMTP
6879 connections were dropped. The message is now more accurate, and temporary
6880 errors are given to SMTP connections.
6882 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6883 (except RSET) with a 421 error, until QUIT is received. However, it was
6884 failing to send a response to QUIT.
6886 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6887 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6888 ACL is now run after the helo_try_verify_hosts code.
6890 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6891 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6892 case-independent, so other case variants are also recognized). Apparently
6893 some systems use these upper case variants.
6895 25. If more than two messages were waiting for the same host, and a transport
6896 filter was specified for the transport, Exim sent two messages over the
6897 same TCP/IP connection, and then failed with "socket operation on non-
6898 socket" when it tried to send the third.
6900 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6902 27. The extern definition of crypt16() in expand.c was not being excluded when
6903 the OS had its own crypt16() function.
6905 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6906 as a preferred synonym for return_size_limit, both as an option and as an
6909 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6911 30. Changed the default configuration ACL to relax the local part checking rule
6912 for addresses that are not in any local domains. For these addresses,
6913 slashes and pipe symbols are allowed within local parts, but the sequence
6914 /../ is explicitly forbidden.
6916 31. SPA server authentication was not clearing the challenge buffer before
6919 32. log_message in a "warn" ACL statement was writing to the reject log as
6920 well as to the main log, which contradicts the documentation and doesn't
6921 seem right (because no rejection is happening). So I have stopped it.
6923 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6924 However, I am unable to do any testing of this.
6926 34. Fixed an infelicity in the appendfile transport. When checking directories
6927 for a mailbox, to see if any needed to be created, it was accidentally
6928 using path names with one or more superfluous leading slashes; tracing
6929 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6931 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6932 contents are added to the log line that is written for every discarded
6933 recipient. (Previously a log_message setting was ignored.)
6935 36. The ${quote: operator now quotes the string if it is empty.
6937 37. The install script runs exim in order to find its version number. If for
6938 some reason other than non-existence or emptiness, which it checks, it
6939 could not run './exim', it was installing it with an empty version number,
6940 i.e. as "exim-". This error state is now caught, and the installation is
6943 38. An argument was missing from the function that creates an error message
6944 when Exim fails to connect to the socket for saslauthd authentication.
6945 This could cause Exim to crash, or give a corrupted message.
6947 39. Added isip, isip4, and isip6 to ${if conditions.
6949 40. The ACL variables $acl_xx are now saved with the message, and can be
6950 accessed later in routers, transports, and filters.
6952 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6953 strings in the file are not string-expanded.
6955 42. If a MAIL command specified a SIZE value that was too large to fit into an
6956 int variable, the check against message_size_limit failed. Such values are
6957 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6958 day this will have to be increased, but I don't think I want to be around
6959 when emails are that large.
6966 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6967 iconv() is not standard in FreeBSD.
6969 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6970 IPv6 enabled. The observed symptom was a segmentation fault on return from
6971 the function os_common_find_running_interfaces() in src/os.c.
6973 3. In the check_special_case() function in daemon.c I had used "errno" as an
6974 argument name, which causes warnings on some systems. This was basically a
6975 typo, since it was named "eno" in the comments!
6977 4. The code that waits for the clock to tick (at a resolution of some fraction
6978 of a second) so as to ensure message-id uniqueness was always waiting for
6979 at least one whole tick, when it could have waited for less. [This is
6980 almost certainly not relevant at current processor speeds, where it is
6981 unlikely to ever wait at all. But we try to future-proof.]
6983 5. The function that sleeps for a time interval that includes fractions of a
6984 second contained a race. It did not block SIGALRM between setting the
6985 timer, and suspending (a couple of lines later). If the interval was short
6986 and the sigsuspend() was delayed until after it had expired, the suspension
6987 never ended. On busy systems this could lead to processes getting stuck for
6990 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6991 process, before it forks any delivery processes. The open lookup caching
6992 mechanism meant that the open file or database connection was passed into
6993 the delivery process. The problem was that delivery processes always tidy
6994 up cached lookup data. This could cause a problem for the next delivery
6995 process started by the queue runner, because the external queue runner
6996 process does not know about the closure. So the next delivery process
6997 still has data in the lookup cache. In the case of a file lookup, there was
6998 no problem because closing a file descriptor in a subprocess doesn't affect
6999 the parent. However, if the lookup was caching a connection to a database,
7000 the connection was closed, and the second delivery process was likely to
7001 see errors such as "PGSQL: query failed: server closed the connection
7002 unexpectedly". The problem has been fixed by closing all cached lookups
7003 in a queue runner before running a delivery process.
7005 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7006 seem to have the "const" qualifier which it has on other OS. I've
7009 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7010 *of the same type* (client or server) with the same public name that an
7011 error should be diagnosed.
7013 9. When Exim looked up a host name for an IP address, but failed to find the
7014 original IP address when looking up the host name (a safety check), it
7015 output the message "<ip address> does not match any IP for NULL", which was
7016 confusing, to say the least. The bug was that the host name should have
7017 appeared instead of "NULL".
7019 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7020 user that is built into the binary, and the -C or -D options is used, root
7021 privilege is dropped before the configuration file is read. In addition,
7022 logging is switched to stderr instead of the normal log files. If the
7023 configuration then re-defines the Exim user, the unprivileged environment
7024 is probably not what is expected, so Exim logs a panic warning message (but
7027 However, if deliver_drop_privilege is set, the unprivileged state may well
7028 be exactly what is intended, so the warning has been cut out in that case,
7029 and Exim is allowed to try to write to its normal log files.
7035 1. smtp_return_error_details was not giving details for temporary sender
7036 or receiver verification errors.
7038 2. Diagnose a configuration error if two authenticators have the same public
7041 3. Exim used not to create the message log file for a message until the first
7042 delivery attempt. This could be confusing when incoming messages were held
7043 for policy or load reasons. The message log file is now created at the time
7044 the message is received, and an initial "Received" line is written to it.
7046 4. The automatically generated man page for command line options had a minor
7047 bug that caused no ill effects; however, a more serious problem was that
7048 the procedure for building the man page automatically didn't always
7049 operate. Consequently, release 4.20 contains an out-of-date version. This
7050 shouldn't happen again.
7052 5. When building Exim with embedded Perl support, the script that builds the
7053 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7054 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7056 6. The freeze_tell option was not being used for messages that were frozen on
7057 arrival, either by an ACL or by local_scan().
7059 7. Added the smtp_incomplete_transaction log selector.
7061 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7062 was accepting AUTH without a new EHLO.
7064 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7065 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7068 10. Logging of TCP/IP connections (when configured) now happens in the main
7069 daemon process instead of the child process, so that the TCP/IP connection
7070 count is more accurate (but it can never be perfect).
7072 11. The use of "drop" in a nested ACL was not being handled correctly in the
7073 outer ACL. Now, if condition failure induced by the nested "drop" causes
7074 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7075 or "require"), the connection is dropped.
7077 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7078 that yield "discard" can now be used with an "accept" or a "discard" verb,
7079 but an error is generated for any others (because I can't see a useful way
7080 to define what should happen).
7082 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7083 are now processed in the same way as lines in the Exim configuration file.
7084 In particular, continuation lines are supported.
7086 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7088 15. Added -ti meaning -t -i.
7090 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7091 domains, and warn by logging if others are found.
7093 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7094 returned from GIFCONF when Exim is trying to find the list of interfaces on
7095 a host. The code in os.c has been modified to copy each ifreq to an aligned
7096 structure in all cases.
7098 Also, in some cases, the returned ifreq's were being copied to a 'struct
7099 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7100 means the last couple of bytes of an IPv6 address could be chopped if the
7101 ifreq contained only a normal sockaddr (14 bytes storage).
7103 18. Named domain lists were not supported in the hosts_treat_as_local option.
7104 An entry such as +xxxx was not recognized, and was treated as a literal
7107 19. Ensure that header lines added by a DATA ACL are included in the reject log
7108 if the ACL subsequently rejects the message.
7110 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7111 MD5 (which is deprecated).
7113 21. When testing a filter file using -bf, Exim was writing a message when it
7114 took the sender from a "From " line in the message, but it was not doing so
7115 when it took $return_path from a Return-Path: header line. It now does.
7117 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7118 with a valid header line field name (a series of printing characters
7119 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7121 23. Changed "disc" in the source to "disk" to conform to the documentation and
7122 the book and for uniformity.
7124 24. Ignore Sendmail's -Ooption=value command line item.
7126 25. When execve() failed while trying to run a command in a pipe transport,
7127 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7128 could be confused with a return value of 69 from the command itself. This
7129 has been changed to 127, the value the shell returns if it is asked to run
7130 a non-existent command. The wording for the related log line suggests a
7131 non-existent command as the problem.
7133 26. If received_header_text expands to an empty string, do not add a Received:
7134 header line to the message. (Well, it adds a token one on the spool, but
7135 marks it "old" so that it doesn't get used or transmitted.)
7137 27. Installed eximstats 1.28 (addition of -nt option).
7139 28. There was no check for failure on the call to getsockname() in the daemon
7140 code. This can fail if there is a shortage of resources on the system, with
7141 ENOMEM, for example. A temporary error is now given on failure.
7143 29. Contrary to the C standard, it seems that in some environments, the
7144 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7145 program. Exim now does this explicitly; it affects the formatting of
7146 timestamps using strftime().
7148 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7149 complaints. I've now initialized all the variables, to avoid this.
7151 32. Header lines added by a system filter were not being "seen" during
7152 transport-time rewrites.
7154 33. The info_callback() function passed to OpenSSL is set up with type void
7155 (*)(SSL *, int, int), as described somewhere. However, when calling the
7156 function (actually a macro) that sets it up, the type void(*)() is
7157 expected. I've put in a cast to prevent warnings from picky compilers.
7159 34. If a DNS black list lookup found a CNAME record, but there were no A
7160 records associated with the domain it pointed at, Exim crashed.
7162 35. If a DNS black list lookup returned more than one A record, Exim ignored
7163 all but the first. It now scans all returned addresses if a particular IP
7164 value is being sought. In this situation, the contents of the
7165 $dnslist_value variable are a list of all the addresses, separated by a
7168 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7169 to accept a host name and all its aliases if the forward lookup for any of
7170 them yielded the IP address of the incoming connection. Now it accepts only
7171 those names whose forward lookup yields the correct IP address. Any other
7172 names are discarded. This closes a loophole whereby a rogue DNS
7173 administrator could create reverse DNS records to break through a
7174 wildcarded host restriction in an ACL.
7176 37. If a user filter or a system filter that ran in a subprocess used any of
7177 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7178 the wrong values were passed to the pipe command ($thisaddress had the
7179 value of $0, $0 had the value of $1, etc). This bug was introduced by
7180 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7182 38. Improved the line breaking for long SMTP error messages from ACLs.
7183 Previously, if there was no break point between 40 and 75 characters, Exim
7184 left the rest of the message alone. Two changes have been made: (a) I've
7185 reduced the minimum length to 35 characters; (b) if it can't find a break
7186 point between 35 and 75 characters, it looks ahead and uses the first one
7187 that it finds. This may give the occasional overlong line, but at least the
7188 remaining text gets split now.
7190 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7191 file descriptors might be low, and that setting 1000 would always raise it.
7192 It turns out that in some environments, the limit is already over 1000 and
7193 that lowering it causes trouble. So now Exim takes care not to decrease it.
7195 40. When delivering a message, the value of $return_path is set to $sender_
7196 address at the start of routing (routers may change the value). By an
7197 oversight, this default was not being set up when an address was tested by
7198 -bt or -bv, which affected the outcome if any router or filter referred to
7201 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7202 log only when "message" or "log_message" are set. However, if one of the
7203 conditions was an address verification, or a call to a nested ACL, the
7204 messages generated by the underlying test were being passed through. This
7205 no longer happens. The underlying message is available in $acl_verify_
7206 message for both "message" and "log_message" expansions, so it can be
7207 passed through if needed.
7209 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7210 new expansion $bh_ to give the encoded byte string without charset
7211 translation. Translation happens only if iconv() is available; HAVE_ICONV
7212 indicates this at build time. HEADERS_CHARSET gives the charset to
7213 translate to; headers_charset can change it in the configuration, and
7214 "headers charset" can change it in an individual filter file.
7216 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7217 that creates RFC 2047 encoded "words" labels them as that charset instead
7218 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7219 expansion operator; (ii) when Exim creates a From: line for a local
7220 message; (iii) when a header line is rewritten to include a "phrase" part.
7222 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7223 buggy, causing it to skip the first lines of messages whose message ID
7224 ended in 'D'. This would not have bitten before Exim release 4.14, because
7225 message IDs were unlikely to end in 'D' before then. The effect was to have
7226 incorrect size information for certain domains.
7228 45. #include "config.h" was missing at the start of the crypt16.c module. This
7229 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7232 46. If there was a timeout during a "random" callout check, Exim treated it as
7233 a failure of the random address, and carried on sending RSET and the real
7234 address. If the delay was just some slowness somewhere, the response to the
7235 original RCPT would be taken as a response to RSET and so on, causing
7236 mayhem of various kinds.
7238 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7239 when I implemented it. It didn't allow for the fact that some option values
7240 may legitimately be negative (e.g. size_addition), and it didn't even do
7241 the right test for positive values.
7243 48. Domain names in DNS records are case-independent. Exim always looks them up
7244 in lower case. Some resolvers return domain names in exactly the case they
7245 appear in the zone file, that is, they may contain uppercase letters. Not
7246 all resolvers do this - some return always lower case. Exim was treating a
7247 change of case by a resolver as a change of domain, similar to a widening
7248 of a domain abbreviation. This triggered its re-routing code and so it was
7249 trying to route what was effectively the same domain again. This normally
7250 caused routing to fail (because the router wouldn't handle the domain
7251 twice). Now Exim checks for this case specially, and just changes the
7252 casing of the domain that it ultimately uses when it transmits the message
7255 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7258 50. If a filter generated a file delivery with a non-absolute name (possible if
7259 no home directory exists for the router), the forbid_file option was not
7262 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7263 the existing equality matching.
7265 52. Exim was using ints instead of ino_t variables in some places where it was
7266 dealing with inode numbers.
7268 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7269 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7270 called TMPDIR, and if it finds it is different, it changes its value.
7272 54. The smtp_printf() function is now made available to local_scan() so
7273 additional output lines can be written before returning. There is also an
7274 smtp_fflush() function to enable the detection of a dropped connection.
7275 The variables smtp_input and smtp_batched_input are exported to
7278 55. Changed the default runtime configuration: the message "Unknown user"
7279 has been removed from the ACL, and instead placed on the localuser router,
7280 using the cannot_route_message feature. This means that any verification
7281 failures that generate their own messages won't get overridden. Similarly,
7282 the "Unrouteable address" message that was in the ACL for unverifiable
7283 relay addresses has also been removed.
7285 56. Added hosts_avoid_esmtp to the smtp transport.
7287 57. The exicyclog script was not checking for the esoteric option
7288 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7289 will work only if exicyclog is run under the appropriate euid.
7291 58. Following a discussion on the list, the rules by which Exim recognises line
7292 endings on incoming messages have been changed. The -dropcr and drop_cr
7293 options are now no-ops, retained only for backwards compatibility. The
7294 following line terminators are recognized: LF CRLF CR. However, special
7295 processing applies to CR:
7297 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7298 nor a local message in the state where . is a terminator.
7300 (ii) If a bare CR is encountered in a header line, an extra space is added
7301 after the line terminator so as not to end the header. The reasoning
7302 behind this is that bare CRs in header lines are most likely either
7303 to be mistakes, or people trying to play silly games.
7305 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7306 was being incorrectly given as 18 bytes larger than it should have been.
7307 This is a VOB (very old bug).
7309 60. This may never have affected anything current, but just in case it has:
7310 When the local host is found other than at the start of a list of hosts,
7311 the local host, those with the same MX, and any that follow, are discarded.
7312 When the list in question was part of a longer list of hosts, the following
7313 hosts (not currently being processed) were also being discarded. This no
7314 longer happens. I'm not sure if this situation could ever has previously
7317 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7320 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7321 header. This is something that is recommended in a new Internet Draft, and
7322 is something that is documented as being done by Sendmail. There are two
7323 possible values. For messages generated by the autoreply transport, Exim
7326 Auto-Submitted: auto-replied
7328 whereas for all other generated messages (e.g. bounces) it adds
7330 Auto-Submitted: auto-generated
7332 63. The "personal" condition in filters now includes a test for the
7333 Auto-Submitted: header. If it contains the string "auto-" the message it
7334 not considered personal.
7336 64. Added rcpt_include_affixes as a generic transport option.
7338 65. Added queue_only_override (default true).
7340 66. Added the syslog_duplication option.
7342 67. If what should have been the first header line of a message consisted of
7343 a space followed by a colon, Exim was mis-interpreting it as a header line.
7344 It isn't of course - it is syntactically invalid and should therefore be
7345 treated as the start of the message body. The misbehaviour could have
7346 caused a number of strange effects, including loss of data in subsequent
7347 header lines, and spool format errors.
7349 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7350 client host had authenticated. This control can now be exercised by an ACL
7351 for more flexibility.
7353 69. By default, callouts do not happen when testing with -bh. There is now a
7354 variant, -bhc, which does actually run the callout code, including
7355 consulting and updating the callout cache.
7357 70. Added support for saslauthd authentication, courtesy of Alexander
7360 71. If statvfs() failed on the spool or log directories while checking their
7361 size for availability, Exim confusingly gave the error "space shortage".
7362 Furthermore, in debugging mode it crashed with a floating point exception.
7363 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7364 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7365 serious problem, Exim now writes to the main and panic logs when this
7366 happens, with details of the failure. It then refuses to accept the
7367 incoming message, giving the message "spool directory problem" or "log
7368 directory problem" with a 421 code for SMTP messages.
7370 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7371 0, 1, and 2 exist, because some OS complain for execs without them (see
7372 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7373 descriptors. However, the code omitted to check that the open succeeded,
7374 causing mysterious errors if for some reason the permissions on /dev/null
7375 got screwed. Now Exim writes a message to the main and panic logs, and
7376 bombs out if it can't open /dev/null.
7378 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7379 interact so that it is all more flexible. It is supposed to remain
7380 backwards compatible. Also added extra_local_interfaces.
7382 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7383 to bomb out with an assertion failure - to the client this appears as a
7384 connection drop. This problem occurs in the part of the code that was taken
7385 from the Samba project. Fortunately, the assertion is in a very simple
7386 function, so I have fixed this by reproducing the function inline in the
7387 one place where it is called, and arranging for authentication to fail
7388 instead of killing the process with assert().
7390 75. The SPA client code was not working when the server requested OEM rather
7391 than Unicode encoding.
7393 76. Added code to make require_files with a specific uid setting more usable in
7394 the case where statting the file as root fails - usually a non-root-mounted
7395 NFS file system. When this happens and the failure is EACCES, Exim now
7396 forks a subprocess and does the per-uid checking as the relevant uid.
7398 77. Added process_log_path.
7400 78. If log_file_path was not explicitly set, a setting of check_log_space or
7401 check_log_inodes was ignored.
7403 79. If a space check for the spool or log partitions fails, the incident is now
7404 logged. Of course, in the latter case the data may get lost...
7406 80. Added the %p formatting code to string_format() so that it can be used to
7407 print addresses in debug_print(). Adjusted all the address printing in the
7408 debugging in store.c to use %p rather than %d.
7410 81. There was a concern that a line of code in smtp_in.c could overflow a
7411 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7412 initially expressed, the concern was not well-founded, because trailing
7413 spaces are removed early. However, if the trailing spaces were followed by
7414 a NULL, they did not get removed, so the overflow was possible. Two fixes
7417 (a) I re-wrote the offending code in a cleaner fashion.
7418 (b) If an incoming SMTP command contains a NULL character, it is rejected
7421 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7422 runs initgroups(), so that if the Exim user is in any additional groups,
7423 they will be used during message reception.
7429 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob