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/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
12 buffer overrun for (non-chunking) other transports.
14 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
15 TLS1.3, means that a server rejecting a client certificate is not visible
16 to the client until the first read of encrypted data (typically the
17 response to EHLO). Add detection for that case and treat it as a failed
18 TLS connection attempt, so that the normal retry-in-clear can work (if
21 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
22 and/or domain. Found and fixed by Jason Betts.
24 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
25 configuration). If a CNAME target was not a wellformed name pattern, a
28 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
29 the OS reports them interleaved with other addresses.
31 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
32 used both for input and for a verify callout, both encrypted, SMTP
33 responses being sent by the server could be lost. This resulted in
34 dropped connections and sometimes bounces generated by a peer sending
37 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
38 string. Previously it was possible to cause undefined behaviour in a
39 library routine (usually a crash). Found by "zerons".
41 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
44 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
45 API was removed, so update to use the newer ones.
48 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
49 to changes apparently associated with TLS1.3 handling some of the APIs
50 previously used were either nonfunctional or inappropriate. Strings
51 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
52 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
53 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
54 This affects log line X= elements, the $tls_{in,out}_cipher variables,
55 and the use of specific cipher names in the encrypted= ACL condition.
57 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
58 verification result was not updated unless hosts_require_ocsp applied.
64 JH/01 Remove code calling the customisable local_scan function, unless a new
65 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
67 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
68 non-signal-safe functions being used.
70 JH/03 Bug 2269: When presented with a received message having a stupidly large
71 number of DKIM-Signature headers, disable DKIM verification to avoid
72 a resource-consumption attack. The limit is set at twenty.
74 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
75 report of oldest_pass in ${authres } in consequence, and separate out
76 some descriptions of reasons for verification fail.
78 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
79 files in the spool were present and unlocked. A queue-runner could spot
80 them, resulting in a duplicate delivery. Fix that by doing the unlock
81 after the unlink. Investigation by Tim Stewart. Take the opportunity to
82 add more error-checking on spoolfile handling while that code is being
85 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
86 No known attacks, no CVE, this is defensive hardening.
88 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
89 a queue-runner could start a delivery while other operations were ongoing.
90 Cutthrough delivery was a common victim, resulting in duplicate delivery.
91 Found and investigated by Tim Stewart. Fix by using the open message data
92 file handle rather than opening another, and not locally closing it (which
93 releases a lock) for that case, while creating the temporary .eml format
94 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
96 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
97 $sender_verify_failure/$recipient_verify_failure to "random".
99 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
102 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
103 Previously this would segfault.
105 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
108 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
109 like zero, since the resolver should be doing this for us, But we need one
110 as a CNAME but no MX presence gets the CNAME returned; we need to check
111 that doesn't point to an MX to declare it "no MX returned" rather than
112 "error, loop". A new main option is added so the older capability of
113 following some limited number of chain links is maintained.
115 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
117 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
118 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
119 now-deprecated earlier definitions used only specified the range up to TLS
120 1.2 (in the older-version library docs).
122 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
124 JH/15 Rework TLS client-side context management. Stop using a global, and
125 explicitly pass a context around. This enables future use of TLS for
126 connections to service-daemons (eg. malware scanning) while a client smtp
127 connection is using TLS; with cutthrough connections this is quite likely.
129 JH/16 Fix ARC verification to do AS checks in reverse order.
131 JH/17 Support a "tls" option on the ${readsocket } expansion item.
133 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
134 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
135 Previously the "utf8" would be re-prepended for every additional message.
137 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
138 Previously thery were accepted, resulting in issues when attempting to
139 forward messages to a non-supporting MTA.
141 PP/02 Let -n work with printing macros too, not just options.
143 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
144 one parent address was copied, and bogus data was used at delivery-logging
145 time. Either a crash (after delivery) or bogus log data could result.
146 Discovery and analysis by Tim Stewart.
148 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
149 Previously if the string ended mid-character, we did not insert the
150 promised '?' replacement.
152 PP/04 Documentation: current string operators work on bytes, not codepoints.
154 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
155 should pack well giving a smaller memory footprint so better caching and
156 therefore performance. Group the declarations where this can't be done so
157 that the byte-sized flag variables are not interspersed among pointer
158 variables, giving a better chance of good packing by the compiler.
160 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
161 non-null, to avoid issues with sites running BATV. Previously reports were
162 sent with an empty envelope sender so looked like bounces.
164 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
165 The ignore_error flag wasn't being returned from the filter subprocess so
166 was not set for later routers. Investigation and fix by Matthias Kurz.
168 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
169 and a msg:complete for the whole, when a message is manually removed using
170 -Mrm. Developement by Matthias Kurz, hacked on by JH.
172 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
173 a "Gnu special" function, asprintf() in the DB utility binary builds; I
174 hope that is portable enough.
176 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
177 requiring a known-CA anchor certificate; make it now rely entirely on the
178 TLSA as an anchor. Checking the name on the leaf cert against the name
179 on the A-record for the host is still done for TA (but not for EE mode).
181 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
182 included in delivery lines for non-proxied connections, when compiled with
183 SUPPORT_SOCKS and running with proxy logging enabled.
185 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
186 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
187 move the existing event to fire before the normal logging of message
188 failure so that custom logging is bracketed by normal logging.
190 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
191 msg:fail:internal event. Developement by Matthias Kurz.
193 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
194 far too small for todays use of crypto signatures stored there. Go all
195 the way to the max DNS message size of 64kB, even though this might be
196 overmuch for IOT constrained device use.
198 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
199 copy a string over itself. The library routine is documented as not
200 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
202 JH/32 For main options check_spool_space and check_inode_space, where the
203 platform supports 64b integers, support more than the previous 2^31 kB
204 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
205 the previous G, M, k.
207 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
208 $authenticated_fail_id variable on authentication failure. Previously
211 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
212 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
213 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
214 GNUTLS_SEC_PARAM_MEDIUM.
216 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
217 side. Previously we would continue as if no SNI had been received.
219 JH/36 Harden the handling of string-lists. When a list consisted of a sole
220 "<" character, which should be a list-separator specification, we walked
221 off past the nul-terimation.
223 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
224 causes) even when the retry time is not yet met. Previously they were
225 not, meaning that when (say) an account was over-quota and temp-rejecting,
226 and multiple senders' messages were queued, only one sender would get
227 notified on each configured delay_warning cycle.
229 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
231 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
232 cipher-suites, an error can be left on the stack even for a succeeding
233 accept; this results in impossible error messages when a later operation
236 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
237 return error codes indicating retry. Under TLS1.3 this becomes required.
239 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
240 it only wrote the new authenticators, resulting in a lack of tracking of
241 peer changes of ESMTP extensions until the next cache flush.
243 JH/41 Fix the loop reading a message header line to check for integer overflow,
244 and more-often against header_maxsize. Previously a crafted message could
245 induce a crash of the recive process; now the message is cleanly rejected.
247 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
248 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
254 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
255 When redis_servers is set to a list of > 1 element, and the Redis servers
256 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
257 case of MOVED into a DEFER case instead, thus moving the query onto the
258 next server in the list. For a cluster of N elements, all N servers must
259 be defined in redis_servers.
261 GF/02 Catch and remove uninitialized value warning in exiqsumm
262 Check for existence of @ARGV before looking at $ARGV[0]
264 JH/01 Replace the store_release() internal interface with store_newblock(),
265 which internalises the check required to safely use the old one, plus
266 the allocate and data copy operations duplicated in both (!) of the
267 extant use locations.
269 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
270 modifier. This matches the restriction on the commandline.
272 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
273 Previously only the last row was returned.
275 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
276 we assumed that tags in the header were well-formed, and parsed the
277 element content after inspecting only the first char of the tag.
278 Assumptions at that stage could crash the receive process on malformed
281 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
282 While running the DKIM ACL we operate on the Permanent memory pool so that
283 variables created with "set" persist to the DATA ACL. Also (at any time)
284 DNS lookups that fail create cache records using the Permanent pool. But
285 expansions release any allocations made on the current pool - so a dnsdb
286 lookup expansion done in the DKIM ACL releases the memory used for the
287 DNS negative-cache, and bad things result. Solution is to switch to the
288 Main pool for expansions.
289 While we're in that code, add checks on the DNS cache during store_reset,
290 active in the testsuite.
291 Problem spotted, and debugging aided, by Wolfgang Breyha.
293 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
294 When none of the hosts presented to a transport match an already-open
295 connection, close it and proceed with the list. Previously we would
296 queue the message. Spotted by Lena with Yahoo, probably involving
299 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
300 Previously a spurious "250 OK id=" response was appended to the proper
303 JH/08 The "support for" informational output now, which built with Content
304 Scanning support, has a line for the malware scanner interfaces compiled
305 in. Interface can be individually included or not at build time.
307 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
308 by the template makefile "src/EDITME". The "STREAM" support for an older
309 ClamAV interface method is removed.
311 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
312 rows affected is given instead).
314 JH/11 The runtime Berkeley DB library version is now additionally output by
315 "exim -d -bV". Previously only the compile-time version was shown.
317 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
318 SMTP connection. Previously, when one had more receipients than the
319 first, an abortive onward connection was made. Move to full support for
320 multiple onward connections in sequence, handling cutthrough connection
321 for all multi-message initiating connections.
323 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
324 routers. Previously, a multi-recipient message would fail to match the
325 onward-connection opened for the first recipient, and cause its closure.
327 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
328 a timeout on read on a GnuTLS initiating connection, resulting in the
329 initiating connection being dropped. This mattered most when the callout
330 was marked defer_ok. Fix to keep the two timeout-detection methods
333 JH/15 Relax results from ACL control request to enable cutthrough, in
334 unsupported situations, from error to silently (except under debug)
335 ignoring. This covers use with PRDR, frozen messages, queue-only and
338 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
340 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
341 metadata, resulting in a crash in free().
343 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
344 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
345 Broken also in d185889f4, with init system revamp.
347 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
348 Previously we abruptly closed the connection after reading a malware-
349 found indication; now we go on to read the "scan ok" response line,
352 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
353 ACL. Previously, a crash would result.
355 JH/19 Speed up macro lookups during configuration file read, by skipping non-
356 macro text after a replacement (previously it was only once per line) and
357 by skipping builtin macros when searching for an uppercase lead character.
359 JH/20 DANE support moved from Experimental to mainline. The Makefile control
360 for the build is renamed.
362 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
363 was allocated for every new TLS startup, meaning one per message. Fix
364 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
366 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
367 reported the original. Fix to report (as far as possible) the ACL
368 result replacing the original.
370 JH/23 Fix memory leak during multi-message connections using STARTTLS under
371 OpenSSL. Certificate information is loaded for every new TLS startup,
372 and the resources needed to be freed.
374 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
376 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
379 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
380 DATA response info to the (existing) per-recipient response info for
381 the "C=" log element. It can have useful tracking info from the
382 destination system. Patch from Simon Arlott.
384 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
385 length value. Previously this would segfault.
387 HS/02 Support Avast multiline protoocol, this allows passing flags to
388 newer versions of the scanner.
390 JH/28 Ensure that variables possibly set during message acceptance are marked
391 dead before release of memory in the daemon loop. This stops complaints
392 about them when the debug_store option is enabled. Discovered specifically
393 for sender_rate_period, but applies to a whole set of variables.
394 Do the same for the queue-runner and queue-list loops, for variables set
395 from spool message files. Do the same for the SMTP per-message loop, for
396 certain variables indirectly set in ACL operations.
398 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
399 as a multi-recipient message from a mailinglist manager). The coding had
400 an arbitrary cutoff number of characters while checking for more input;
401 enforced by writing a NUL into the buffer. This corrupted long / fast
402 input. The problem was exposed more widely when more pipelineing of SMTP
403 responses was introduced, and one Exim system was feeding another.
404 The symptom is log complaints of SMTP syntax error (NUL chars) on the
405 receiving system, and refused recipients seen by the sending system
406 (propating to people being dropped from mailing lists).
407 Discovered and pinpointed by David Carter.
409 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
410 replaced by the ${authresults } expansion.
412 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
414 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
415 allows proper process termination in container environments.
417 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
418 Previously the "final dot" had a newline after it; ensure it is CR,LF.
420 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
421 and "err_perm", deprecated since 4.83 when the RFC-defined words
422 "temperror" and "permerror" were introduced.
424 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
425 transport-filters or DKIM-signing. The restriction was lost in the
426 consolidation of verify-callout and delivery SMTP handling.
427 Extend the restriction to also cover ARC-signing.
429 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
430 in defer=pass mode supply a 450 to the initiator. Previously the message
433 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
434 tls_require_ciphers is used as before.
436 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
437 "pass_unscanned". Only tmpfails from the scanner are written to
438 the paniclog, as they may require admin intervention (permission
439 denied, license issues). Other scanner errors (like decompression
440 bombs) do not cause a paniclog entry.
442 JH/36 Fix reinitialisation of DKIM logging variable between messages.
443 Previously it was possible to log spurious information in receive log
446 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
447 triggered odd behaviour from Outlook Express clients.
449 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
452 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
453 since the IETF WG has not yet settled on that versus the original
454 "bare" representation.
456 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
457 Previously the millisecond value corrupted the output.
458 Fix also for syslog_pid=no and log_selector +pid, for which the pid
459 corrupted the output.
465 JH/01 Rework error string handling in TLS interface so that the caller in
466 more cases is responsible for logging. This permits library-sourced
467 string to be attached to addresses during delivery, and collapses
468 pairs of long lines into single ones.
470 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
471 during configuration. Wildcards are allowed and expanded.
473 JH/02 Rework error string handling in DKIM to pass more info back to callers.
474 This permits better logging.
476 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
477 do not close it down and have the child transport start it up again on
478 the passed-on TCP connection. Instead, proxy the child (and any
479 subsequent ones) for TLS via a unix-domain socket channel. Logging is
480 affected: the continued delivery log lines do not have any DNSSEC, TLS
481 Certificate or OCSP information. TLS cipher information is still logged.
483 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
484 identical IP addresses on different listening ports. Will also affect
487 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
488 add noisy ifdef guards to special-case this sillyness.
489 Patch from Bernd Kuhls.
491 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
492 than 255 are no longer allowed.
494 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
495 Disable the session-cache too, which might reduce our load. Since we
496 currrectly use a new context for every connection, both as server and
497 client, there is no benefit for these.
498 GnuTLS appears to not support tickets server-side by default (we don't
499 call gnutls_session_ticket_enable_server()) but client side is enabled
500 by default on recent versions (3.1.3 +) unless the PFS priority string
503 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
504 <https://reproducible-builds.org/specs/source-date-epoch/>.
506 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
507 the check for any unsuccessful recipients did not notice the limit, and
508 erroneously found still-pending ones.
510 JH/08 Pipeline CHUNKING command and data together, on kernels that support
511 MSG_MORE. Only in-clear (not on TLS connections).
513 JH/09 Avoid using a temporary file during transport using dkim. Unless a
514 transport-filter is involved we can buffer the headers in memory for
515 creating the signature, and read the spool data file once for the
516 signature and again for transmission.
518 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
519 4.77 as the kernel support then wasn't solid, having issues in 64bit
520 mode. Now, it's been long enough. Add support for FreeBSD also.
522 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
523 case where the routing stage had gathered several addresses to send to
524 a host before calling the transport for the first, we previously failed
525 to close down TLS in the old transport process before passing the TCP
526 connection to the new process. The new one sent a STARTTLS command
527 which naturally failed, giving a failed delivery and bloating the retry
528 database. Investigation and fix prototype from Wolfgang Breyha.
530 JH/12 Fix check on SMTP command input synchronisation. Previously there were
531 false-negatives in the check that the sender had not preempted a response
532 or prompt from Exim (running as a server), due to that code's lack of
533 awareness of the SMTP input buffering.
535 PP/04 Add commandline_checks_require_admin option.
536 Exim drops privileges sanely, various checks such as -be aren't a
537 security problem, as long as you trust local users with access to their
538 own account. When invoked by services which pass untrusted data to
539 Exim, this might be an issue. Set this option in main configuration
540 AND make fixes to the calling application, such as using `--` to stop
543 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
544 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
545 responses to those, into a single TLS record each way (this usually means
546 a single packet). As a side issue, smtp_enforce_sync now works on TLS
549 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
550 affects you only if you're dancing at the edge of the param size limits.
551 If you are, and this message makes sense to you, then: raise the
552 configured limit or use OpenSSL 1.1. Nothing we can do for older
555 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
556 cmdline element to get the documented default one. Previously it was
559 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
560 are unsuable for non-message-specific reasons - eg. connection timeout,
561 banner-time rejection.
563 JH/16 Fix logging of delivery remote port, when specified by router, under
566 PP/06 Repair manualroute's ability to take options in any order, even if one
567 is the name of a transport.
570 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
572 JH/17 Change the list-building routines interface to use the expanding-string
573 triplet model, for better allocation and copying behaviour.
575 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
576 Previously it was constructed the first time a possibly-matching string
577 was met in the configuration file input during startup; now it is done
580 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
581 compatible one, to avoid the (poorly documented) possibility of a config
582 file in the working directory redirecting the DB files, possibly correpting
583 some existing file. CVE-2017-10140 assigned for BDB.
585 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
586 cache-hot. Previously, although the result was properly cached, the
587 initial verify call returned a defer.
589 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
590 the main verify for receipient in uncached-mode.
592 JH/22 Retire historical build files to an "unsupported" subdir. These are
593 defined as "ones for which we have no current evidence of testing".
595 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
596 if present. Previously it was ignored.
598 JH/24 Start using specified-initialisers in C structure init coding. This is
599 a C99 feature (it's 2017, so now considered safe).
601 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
602 if was a fixed-sized field and bitmask ops via macros; it is now more
605 PP/07 GitHub PR 56: Apply MariaDB build fix.
606 Patch provided by Jaroslav Škarvada.
608 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
609 during Coverity cleanups [4.87 JH/47]
610 Diagnosis and fix provided by Michael Fischer v. Mollard.
612 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
613 the right size to place the terminating semicolon on its own folded
614 line, the header hash was calculated to an incorrect value thanks to
615 the (relaxed) space the fold became.
617 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
618 and confused the parent.
620 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
621 which could crash as a result. This could lead to undeliverable messages.
623 JH/28 Logging: "next input sent too soon" now shows where input was truncated
626 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
627 matters on fast-turnover and PID-randomising systems, which were getting
628 out-of-order delivery.
630 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
631 a possibly-overlapping copy. The symptom was that "Remote host closed
632 connection in response to HELO" was logged instead of the actual 4xx
635 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
636 Previously only that bufferd was discarded, resulting in SYMTP command
639 JH/32 DKIM: when a message has multiple signatures matching an identity given
640 in dkim_verify_signers, run the dkim acl once for each. Previously only
641 one run was done. Bug 2189.
643 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
644 "panic the current process" to "deliberately defer". The panic log is
645 still written with the problem list name; the mail and reject logs now
646 get a temp-reject line for the message that was being handled, saying
647 something like "domains check lookup or other defer". The SMTP 451
648 message is still "Temporary local problem".
650 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
651 A crafted sequence of BDAT commands could result in in-use memory beeing
652 freed. CVE-2017-16943.
654 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
655 from SMTP input. Previously it was always done; now only done for DATA
656 and not BDAT commands. CVE-2017-16944.
658 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
659 to the message (such as an overlong header line). Previously this was
660 not done and we did not exit BDAT mode. Followon from the previous item
661 though a different problem.
667 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
668 than -2003 did; needs libidn2 in addition to libidn.
670 JH/02 The path option on a pipe transport is now expanded before use.
672 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
673 Patch provided by "Björn", documentation fix added too.
675 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
676 missing a wire-to-host endian conversion.
678 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
679 close after a BDAT command line could be taken as a following command,
680 giving a synch failure. Fix by only checking for synch immediately
681 before acknowledging the chunk.
683 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
684 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
685 macro. Patches provided by Josh Soref.
687 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
688 Previously we did not; the RFC seems ambiguous and VRFY is not listed
689 by IANA as a service extension. However, John Klensin suggests that we
692 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
693 the dkim code may be unix-mode line endings rather than smtp wire-format
694 CRLF, so prepend a CR to any bare LF.
696 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
697 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
699 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
700 the first were themselves being wrongly included in the feed into dkim
701 processing; with most chunk sizes in use this resulted in an incorrect
702 body hash calculated value.
704 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
705 DKIM signature block, for verification. Although advised against by
706 standards it is specifically not ruled illegal.
708 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
710 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
711 missing a body hash (the bh= tag).
713 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
714 It seems that HAProxy sends the Proxy Protocol information in clear and
715 only then does a TLS startup, so do the same.
717 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
718 TCP connections (such as for Spamd) unless the daemon successfully set
719 Fast Open mode on its listening sockets. This fixes breakage seen on
720 too-old kernels or those not configured for Fast Open, at the cost of
721 requiring both directions being enabled for TFO, and TFO never being used
722 by non-daemon-related Exim processes.
724 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
725 endings, at least on the first header line. Try to canonify any that get
726 past that check, despite the cost.
728 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
729 now limited to an arbitrary five deep, while parsing addresses with the
730 strip_excess_angle_brackets option enabled.
732 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
733 instead leave the unprompted TLS handshake in socket buffer for the
734 TLS library to consume.
736 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
738 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
740 JH/16 Drop variables when they go out of scope. Memory management drops a whole
741 region in one operation, for speed, and this leaves assigned pointers
742 dangling. Add checks run only under the testsuite which checks all
743 variables at a store-reset and panics on a dangling pointer; add code
744 explicitly nulling out all the variables discovered. Fixes one known
745 bug: a transport crash, where a dangling pointer for $sending_ip_address
746 originally assigned in a verify callout, is re-used.
748 PP/06 Drop '.' from @INC in various Perl scripts.
750 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
752 PP/08 Reduce a number of compilation warnings under clang; building with
753 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
754 should be warning-free.
756 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
758 HS/01 Fix portability problems introduced by PP/08 for platforms where
759 realloc(NULL) is not equivalent to malloc() [SunOS et al].
761 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
762 chunk. This allows us to accept broken chunked messages. We need a more
763 general solution here.
765 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
766 already-broken messages in the queue.
768 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
770 JH/19 Fix reference counting bug in routing-generated-address tracking.
776 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
777 supports it and a size is available (ie. the sending peer gave us one).
779 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
780 years of being deprecated). The replacements are the ACLs
781 acl_smtp_mime and acl_not_smtp_mime.
783 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
784 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
785 or even an in-clear connection were permitted. Now, if the host lookup
786 was dnssec and dane was requested then the host is only used if the
787 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
788 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
789 if one fails this test.
790 This means that a poorly-configured remote DNS will make it incommunicado;
791 but it protects against a DNS-interception attack on it.
793 JH/04 Bug 1810: make continued-use of an open smtp transport connection
794 non-noisy when a race steals the message being considered.
796 JH/05 If main configuration option tls_certificate is unset, generate a
797 self-signed certificate for inbound TLS connections.
799 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
800 in rewrites and routers.
802 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
803 and logged a warning sing 4.83; now they are a configuration file error.
805 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
806 (lacking @domain). Apply the same qualification processing as RCPT.
808 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
810 JH/10 Support ${sha256:} applied to a string (as well as the previous
813 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
814 a cutthrough deliver is pending, as we always want to make a connection.
815 This also avoids re-routing the message when later placing the cutthrough
816 connection after a verify cache hit.
817 Do not update it with the verify result either.
819 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
820 when routing results in more than one destination address.
822 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
823 signing (which inhibits the cutthrough capability). Previously only
824 the presence of an option was tested; now an expansion evaluating as
825 empty is permissible (obviously it should depend only on data available
826 when the cutthrough connection is made).
828 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
829 the relevant preceding SMTP command did not note the pipelining mode.
831 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
832 Previously they were not counted.
834 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
835 as one having no matching records. Previously we deferred the message
836 that needed the lookup.
838 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
839 distinguished as "(=".
841 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
842 for missing MX records. Previously it only worked for missing A records.
844 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
846 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
847 after the data-go-ahead and data-ack. Patch from Jason Betts.
849 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
850 even for a "none" policy. Patch from Tony Meyer.
852 JH/22 Fix continued use of a connection for further deliveries. If a port was
853 specified by a router, it must also match for the delivery to be
856 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
857 When one of the recipients of a message was unsuitable for the connection
858 (has no matching addresses), we lost track of needing to mark it
859 deferred. As a result mail would be lost.
861 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
863 JH/25 Decoding ACL controls is now done using a binary search; the source code
864 takes up less space and should be simpler to maintain. Merge the ACL
865 condition decode tables also, with similar effect.
867 JH/26 Fix problem with one_time used on a redirect router which returned the
868 parent address unchanged. A retry would see the parent address marked as
869 delivered, so not attempt the (identical) child. As a result mail would
872 JH/27 Fix a possible security hole, wherein a process operating with the Exim
873 UID can gain a root shell. Credit to http://www.halfdog.net/ for
874 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
877 JH/28 Enable {spool,log} filesystem space and inode checks as default.
878 Main config options check_{log,spool}_{inodes,space} are now
879 100 inodes, 10MB unless set otherwise in the configuration.
881 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
882 Previously it only applied to the main-section connection policy
885 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
887 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
888 by me. Added RFC7919 DH primes as an alternative.
890 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
891 are not in the system include path.
893 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
894 GnuTLS, when a session startup failed (eg because the client disconnected)
895 Exim did stdio operations after fclose. This was exposed by a recent
896 change which nulled out the file handle after the fclose.
898 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
899 signed directly by the cert-signing cert, rather than an intermediate
900 OCSP-signing cert. This is the model used by LetsEncrypt.
902 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
904 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
905 an incoming connection.
907 HS/02 Bug 1802: Do not half-close the connection after sending a request
910 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
911 fallback to "prime256v1".
913 JH/34 SECURITY: Use proper copy of DATA command in error message.
914 Could leak key material. Remotely exploitable. CVE-2016-9963.
920 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
921 and 3.4.4 - once the server is enabled to respond to an OCSP request
922 it does even when not requested, resulting in a stapling non-aware
923 client dropping the TLS connection.
925 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
926 support variable-length bit vectors. No functional change.
928 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
929 The I= interface field on outgoing lines is now after the H= remote
930 host field, same as incoming lines. There is a separate
931 outgoing_interface log selector which allows you to disable the
934 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
935 If not running log_selector +smtp_connection the mainlog would be held
936 open indefinitely after a "too many connections" event, including to a
937 deleted file after a log rotate. Leave the per net connection logging
938 leaving it open for efficiency as that will be quickly detected by the
939 check on the next write.
941 HS/01 Bug 1671: Fix post transport crash.
942 Processing the wait-<transport> messages could crash the delivery
943 process if the message IDs didn't exist for some reason. When
944 using 'split_spool_directory=yes' the construction of the spool
945 file name failed already, exposing the same netto behaviour.
947 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
948 mime_regex ACL conditions.
950 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
951 to DSN fail messages (bounces): remote IP, remote greeting, remote response
952 to HELO, local diagnostic string.
954 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
955 log line to debug. Even when configured with a tls authenticator many
956 client connections are expected to not authenticate in this way, so
957 an authenticate fail is not an error.
959 HS/02 Add the Exim version string to the process info. This way exiwhat
960 gives some more detail about the running daemon.
962 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
963 matter for fast-change records such as DNSBLs.
965 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
966 retry record, even if constant. There may be multiple transports with
967 different interface settings and the retry behaviour needs to be kept
970 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
972 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
974 JH/10 Bug 840: fix log_defer_output option of pipe transport
976 JH/11 Bug 830: use same host for all RCPTS of a message, even under
977 hosts_randomize. This matters a lot when combined with mua_wrapper.
979 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
980 ${quote_pgsql:<string>} operator.
982 JH/13 Bug 1708: avoid misaligned access in cached lookup.
984 JH/14 Change header file name for freeradius-client. Relevant if compiling
985 with Radius support; from the Gentoo tree and checked under Fedora.
987 JH/15 Bug 1712: Introduce $prdr_requested flag variable
989 JH/16 Bug 1714: Permit an empty string as expansion result for transport
990 option transport_filter, meaning no filtering.
992 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
994 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
995 defaults to "*" (all hosts). The variable is now available when not built
996 with TLS, default unset, mainly to enable keeping the testsuite sane.
997 If a server certificate is not supplied (via tls_certificate) an error is
998 logged, and clients will find TLS connections fail on startup. Presumably
999 they will retry in-clear.
1000 Packagers of Exim are strongly encouraged to create a server certificate
1001 at installation time.
1003 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1004 with the $config_file variable.
1006 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1007 in transport context, after the attempt, and per-recipient. The latter type
1008 is per host attempted. The event data is the error message, and the errno
1009 information encodes the lookup type (A vs. MX) used for the (first) host,
1010 and the trailing two digits of the smtp 4xx response.
1012 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1013 to write to mainlog (or rejectlog, paniclog) in the window between file
1014 creation and permissions/ownership being changed. Particularly affects
1015 installations where exicyclog is run as root, rather than exim user;
1016 result is that the running daemon panics and dies.
1018 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1020 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1021 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1022 "pri" and "weight". Note that the previous implicit priority given by the
1023 list order is no longer honoured.
1025 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1026 for DKIM processing.
1028 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1029 by defining SUPPORT_SOCKS.
1031 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1032 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1033 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1034 variables are renamed to proxy_{local,external}_{address,port}.
1036 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1037 for a build by defining SUPPORT_I18N
1039 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1040 of the query string, and make ${quote_redis:} do that quoting.
1042 JH/29 Move Events support from Experimental to mainline, enabled by default
1043 and removable for a build by defining DISABLE_EVENT.
1045 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1047 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1048 cached by the daemon.
1050 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1051 by defining LOOKUP_REDIS. The libhiredis library is required.
1053 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1054 keys are given for lookup.
1056 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1057 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1058 only supported when built with TLS support. The PolarSSL SHA routines
1059 are still used when the TLS library is too old for convenient support.
1061 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1062 openssl_options), for security. OpenSSL forces this from version 1.1.0
1063 server-side so match that on older versions.
1065 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1066 allocation for $value could be released as the expansion processing
1067 concluded, but leaving the global pointer active for it.
1069 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1070 and to use the domains and local_parts ACL conditions.
1072 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1073 incorrectly not doubled on cutthrough transmission, hence seen as a
1074 body-termination at the receiving system - resulting in truncated mails.
1075 Commonly the sender saw a TCP-level error, and retransmitted the message
1076 via the normal store-and-forward channel. This could result in duplicates
1077 received - but deduplicating mailstores were liable to retain only the
1078 initial truncated version.
1080 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1082 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1084 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1085 we're in there, support oversigning also; bug 1309.
1087 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1089 HS/04 Add support for keep_environment and add_environment options.
1091 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1092 either intentional arithmetic overflow during PRNG, or testing config-
1095 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1096 delivery resulted in actual delivery. Cancel cutthrough before DATA
1099 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1100 rejects a recipient: pass the reject to the originator.
1102 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1103 Many were false-positives and ignorable, but it's worth fixing the
1106 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1107 for the new environment-manipulation done at startup. Move the routines
1108 from being local to tls.c to being global via the os.c file.
1110 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1111 an extract embedded as result-arg for a map, the first arg for extract
1112 is unavailable so we cannot tell if this is a numbered or keyed
1113 extraction. Accept either.
1119 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1122 JH/02 The smtp transport option "multi_domain" is now expanded.
1124 JH/03 The smtp transport now requests PRDR by default, if the server offers
1127 JH/04 Certificate name checking on server certificates, when exim is a client,
1128 is now done by default. The transport option tls_verify_cert_hostnames
1129 can be used to disable this per-host. The build option
1130 EXPERIMENTAL_CERTNAMES is withdrawn.
1132 JH/05 The value of the tls_verify_certificates smtp transport and main options
1133 default to the word "system" to access the system default CA bundle.
1134 For GnuTLS, only version 3.0.20 or later.
1136 JH/06 Verification of the server certificate for a TLS connection is now tried
1137 (but not required) by default. The verification status is now logged by
1138 default, for both outbound TLS and client-certificate supplying inbound
1141 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1144 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1145 Status Notification (bounce) messages are now MIME format per RFC 3464.
1146 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1147 under the control of the dsn_advertise_hosts option, and routers may
1148 have a dsn_lasthop option.
1150 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1151 default, modifiable by a malware= option. The list separator for
1152 the options can now be changed in the usual way. Bug 68.
1154 JH/10 The smtp_receive_timeout main option is now expanded before use.
1156 JH/11 The incoming_interface log option now also enables logging of the
1157 local interface on delivery outgoing connections.
1159 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1160 if the interface and destination host and port all match.
1162 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1165 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1166 Patch from Andrew Lewis.
1168 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1169 now supports optional time-restrictions, weighting, and priority
1170 modifiers per server. Patch originally by <rommer@active.by>.
1172 JH/16 The spamd_address main option now supports a mixed list of local
1173 and remote servers. Remote servers can be IPv6 addresses, and
1174 specify a port-range.
1176 JH/17 Bug 68: The spamd_address main option now supports an optional
1177 timeout value per server.
1179 JH/18 Bug 1581: Router and transport options headers_add/remove can
1180 now have the list separator specified.
1182 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1185 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1188 JH/21 Support for the A6 type of dns record is withdrawn.
1190 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1191 rather than the verbs used.
1193 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1194 from 255 to 1024 chars.
1196 JH/24 Verification callouts now attempt to use TLS by default.
1198 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1199 are generic router options now. The defaults didn't change.
1201 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1202 Original patch from Alexander Shikoff, worked over by JH.
1204 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1205 files if ZCAT_COMMAND is not executable.
1207 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1209 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1211 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1212 Normally benign, it bites when the pair was led to by a CNAME;
1213 modern usage is to not canonicalize the domain to a CNAME target
1214 (and we were inconsistent anyway for A-only vs AAAA+A).
1216 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1218 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1219 when evaluating $sender_host_dnssec.
1221 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1222 $sender_helo_dnssec variable.
1224 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1226 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1228 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1230 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1231 documented as working, but never had. Support all but $spam_report.
1233 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1234 added for tls authenticator.
1236 HS/03 Add perl_taintmode main config option
1242 TL/01 When running the test suite, the README says that variables such as
1243 no_msglog_check are global and can be placed anywhere in a specific
1244 test's script, however it was observed that placement needed to be near
1245 the beginning for it to behave that way. Changed the runtest perl
1246 script to read through the entire script once to detect and set these
1247 variables, reset to the beginning of the script, and then run through
1248 the script parsing/test process like normal.
1250 TL/02 The BSD's have an arc4random API. One of the functions to induce
1251 adding randomness was arc4random_stir(), but it has been removed in
1252 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1253 function when detected.
1255 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1256 cause callback expansion.
1258 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1259 syntax errors in an expansion can be treated as a string instead of
1260 logging or causing an error, due to the internal use of bool_lax
1261 instead of bool when processing it.
1263 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1264 server certificates when making smtp deliveries.
1266 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1268 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1270 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1272 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1273 Merged patch from Sebastian Wiedenroth.
1275 JH/05 Fix results-pipe from transport process. Several recipients, combined
1276 with certificate use, exposed issues where response data items split
1277 over buffer boundaries were not parsed properly. This eventually
1278 resulted in duplicates being sent. This issue only became common enough
1279 to notice due to the introduction of connection certificate information,
1280 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1282 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1283 size buffer was used, resulting in syntax errors when an expansion
1286 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1287 version 3.3.6 or later.
1289 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1290 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1291 both become "event_action", the variables become $event_name, $event_data
1292 and $event_defer_errno. There is a new variable $verify_mode, usable in
1293 routers, transports and related events. The tls:cert event is now also
1294 raised for inbound connections, if the main configuration event_action
1297 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1298 early OCSP support, but no stapling (appears to be less than 1.0.0).
1300 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1301 server certificate names available under the smtp transport option
1302 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1305 JH/10 Time-related extraction expansions from certificates now use the main
1306 option "timezone" setting for output formatting, and are consistent
1307 between OpenSSL and GnuTLS compilations. Bug 1541.
1309 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1310 encoded parameter in the incoming message. Bug 1558.
1312 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1313 include certificate info, eximon was claiming there were spoolfile
1316 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1318 JH/14 Log delivery-related information more consistently, using the sequence
1319 "H=<name> [<ip>]" wherever possible.
1321 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1322 are problematic for Debian distribution, omit them from the release
1325 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1327 JH/16 Fix string representation of time values on 64bit time_t architectures.
1330 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1331 output list separator was used.
1336 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1337 checkers that were complaining about end of non-void function with no
1340 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1341 This was a regression introduced in 4.83 by another bugfix.
1343 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1345 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1346 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1352 TF/01 Correctly close the server side of TLS when forking for delivery.
1354 When a message was received over SMTP with TLS, Exim failed to clear up
1355 the incoming connection properly after forking off the child process to
1356 deliver the message. In some situations the subsequent outgoing
1357 delivery connection happened to have the same fd number as the incoming
1358 connection previously had. Exim would try to use TLS and fail, logging
1359 a "Bad file descriptor" error.
1361 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1362 utilities have not been installed.
1364 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1365 temporary space as the ACL may create new global variables.
1367 TL/01 LDAP support uses per connection or global context settings, depending
1368 upon the detected version of the libraries at build time.
1370 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1371 to extract and use the src ip:port in logging and expansions as if it
1372 were a direct connection from the outside internet. PPv2 support was
1373 updated based on HAProxy spec change in May 2014.
1375 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1377 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1378 Properly escape header and check for NULL return.
1380 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1383 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1385 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1386 characters in header names, implemented as a verify condition.
1387 Contributed by Michael Fischer v. Mollard.
1389 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1390 results permerror and temperror. Previous values are deprecated but
1391 still accepted. In a future release, err_perm and err_temp will be
1392 completely removed, which will be a backward incompatibility if the
1393 ACL tests for either of these two old results. Patch contributed by
1394 user bes-internal on the mailing list.
1396 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1398 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1399 selectors, in both main and reject logs.
1401 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1404 JH/07 Add malware type "sock" for talking to simple daemon.
1406 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1408 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1409 routers/transports under cutthrough routing.
1411 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1412 numbers. Touch up "bool" conditional to keep the same definition.
1414 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1416 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1418 JH/12 Expand items in router/transport headers_add or headers_remove lists
1419 individually rather than the list as a whole. Bug 1452.
1421 Required for reasonable handling of multiple headers_ options when
1422 they may be empty; requires that headers_remove items with embedded
1423 colons must have them doubled (or the list-separator changed).
1425 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1426 view the policy declared in the DMARC record. Currently, $dmarc_status
1427 is a combined value of both the record presence and the result of the
1430 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1432 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1433 dnslookup router and the smtp transport (applying to the forward
1436 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1437 of ldap servers used for a specific lookup. Patch provided by Heiko
1440 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1441 New variable $lookup_dnssec_authenticated for observability.
1443 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1444 Patch submitted by Lars Timman.
1446 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1448 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1449 Requires trusted mode and valid format message id, aborts otherwise.
1450 Patch contributed by Heiko Schlichting.
1452 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1453 certextract with support for various fields. Bug 1358.
1455 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1456 is requested by default, modifiable by smtp transport option
1459 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1460 operate on certificate variables to give certificate fingerprints
1461 Also new ${sha256:cert_variable}.
1463 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1465 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1466 Christian Aistleitner.
1468 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1470 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1471 file. Patch from Wolfgang Breyha.
1473 JH/25 Expand the coverage of the delivery $host and $host_address to
1474 client authenticators run in verify callout. Bug 1476.
1476 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1477 align with daemon_smtp_ports. Bug 72.
1479 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1480 support and error reporting did not work properly.
1482 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1483 and is readable. Patch from Andrew Colin Kissa.
1485 TL/14 Enhance documentation of ${run expansion and how it parses the
1486 commandline after expansion, particularly in the case when an
1487 unquoted variable expansion results in an empty value.
1489 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1491 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1492 by renaming away from it. Addresses GH issue 15, reported by
1495 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1497 TL/15 SECURITY: prevent double expansion in math comparison functions
1498 (can expand unsanitized data). Not remotely exploitable.
1505 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1507 PP/02 Make -n do something, by making it not do something.
1508 When combined with -bP, the name of an option is not output.
1510 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1513 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1514 $sender_host_name and config options to manage this, and basic check
1517 PP/05 DSCP support for outbound connections and control modifier for inbound.
1519 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1520 (Only plugin which currently uses this is kerberos4, which nobody should
1521 be using, but we should make it available and other future plugins might
1522 conceivably use it, even though it would break NAT; stuff *should* be
1523 using channel bindings instead).
1525 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1526 name; added for Sendmail compatibility; requires admin caller.
1527 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1528 just ignore it); requires trusted caller.
1529 Also parse but ignore: -Ac -Am -X<logfile>
1532 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1534 TL/02 Add +smtp_confirmation as a default logging option.
1536 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1537 Patch by Magnus Holmgren from 2007-02-20.
1539 TL/04 Bugzilla 1281 - Spec typo.
1540 Bugzilla 1283 - Spec typo.
1541 Bugzilla 1290 - Spec grammar fixes.
1543 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1545 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1547 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1548 mailing list by by Dmitry Isaikin.
1550 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1552 JH/02 Support "G" suffix to numbers in ${if comparisons.
1554 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1556 NM/01 Bugzilla 1197 - Spec typo
1557 Bugzilla 1196 - Spec examples corrections
1559 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1561 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1562 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1565 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1566 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1568 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1569 "acl {{name}{arg}...}", and optional args on acl condition
1572 JH/05 Permit multiple router/transport headers_add/remove lines.
1574 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1576 JH/07 Avoid using a waiting database for a single-message-only transport.
1577 Performance patch from Paul Fisher. Bugzilla 1262.
1579 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1582 JH/09 Add $headers_added variable, with content from use of ACL modifier
1583 add_header (but not yet added to the message). Bugzilla 199.
1585 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1586 Pulled from Bugzilla 817 by Wolfgang Breyha.
1588 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1590 (nb: this is the same fix as in Exim 4.80.1)
1592 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1595 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1598 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1600 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1601 advertise SMTP AUTH mechanism to us, instead of a generic
1602 protocol violation error. Also, make Exim more robust to bad
1603 data from the Dovecot auth socket.
1605 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1607 When a queue runner is handling a message, Exim first routes the
1608 recipient addresses, during which it prunes them based on the retry
1609 hints database. After that it attempts to deliver the message to
1610 any remaining recipients. It then updates the hints database using
1613 So if a recipient address works intermittently, it can get repeatedly
1614 deferred at routing time. The retry hints record remains fresh so the
1615 address never reaches the final cutoff time.
1617 This is a fairly common occurrence when a user is bumping up against
1618 their storage quota. Exim had some logic in its local delivery code
1619 to deal with this. However it did not apply to per-recipient defers
1620 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1622 This change adds a proper retry rule check during routing so that the
1623 final cutoff time is checked against the message's age. We only do
1624 this check if there is an address retry record and there is not a
1625 domain retry record; this implies that previous attempts to handle
1626 the address had the retry_use_local_parts option turned on. We use
1627 this as an approximation for the destination being like a local
1628 delivery, as in LMTP.
1630 I suspect this new check makes the old local delivery cutoff check
1631 redundant, but I have not verified this so I left the code in place.
1633 TF/02 Correct gecos expansion when From: is a prefix of the username.
1635 Test 0254 submits a message to Exim with the header
1639 When I ran the test suite under the user fanf2, Exim expanded
1640 the header to contain my full name, whereas it should have added
1641 a Resent-Sender: header. It erroneously treats any prefix of the
1642 username as equal to the username.
1644 This change corrects that bug.
1646 GF/01 DCC debug and logging tidyup
1647 Error conditions log to paniclog rather than rejectlog.
1648 Debug lines prefixed by "DCC: " to remove any ambiguity.
1650 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1652 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1653 Bug spotted by Jeremy Harris; was flawed since initial commit.
1654 Would have resulted in OCSP responses post-SNI triggering an Exim
1655 NULL dereference and crash.
1657 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1659 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1660 Bug detection, analysis and fix by Samuel Thibault.
1661 Bugzilla 1331, Debian bug #698092.
1663 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1665 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1666 Server implementation by Todd Lyons, client by JH.
1667 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1668 config variable "prdr_enable" controls whether the server
1669 advertises the facility. If the client requests PRDR a new
1670 acl_data_smtp_prdr ACL is called once for each recipient, after
1671 the body content is received and before the acl_smtp_data ACL.
1672 The client is controlled by both of: a hosts_try_prdr option
1673 on the smtp transport, and the server advertisement.
1674 Default client logging of deliveries and rejections involving
1675 PRDR are flagged with the string "PRDR".
1677 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1678 fclose(). Diagnosis by Todd Lyons.
1680 PP/17 Update configure.default to handle IPv6 localhost better.
1681 Patch by Alain Williams (plus minor tweaks).
1684 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1685 This is now consistent with GnuTLS, and is now documented: the
1686 previous undocumented portable approach to treating the option as
1687 unset was to force an expansion failure. That still works, and
1688 an empty string is now equivalent.
1690 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1691 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1692 not performing validation itself.
1694 PP/20 Added force_command boolean option to pipe transport.
1695 Patch from Nick Koston, of cPanel Inc.
1697 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1700 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1702 PP/21 Fix eximon continuous updating with timestamped log-files.
1703 Broken in a format-string cleanup in 4.80, missed when I repaired the
1704 other false fix of the same issue.
1705 Report and fix from Heiko Schlichting.
1708 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1709 Report from Prashanth Katuri.
1711 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1712 It's SecureTransport, so affects any MacOS clients which use the
1713 system-integrated TLS libraries, including email clients.
1715 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1716 using a MIME ACL for non-SMTP local injection.
1717 Report and assistance in diagnosis by Warren Baker.
1719 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1721 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1723 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1724 last id that failed so it may be referenced in subsequent ACL's.
1726 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1729 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1730 ldap library initialization, allowing self-signed CA's to be
1731 used. Also properly sets require_cert option later in code by
1732 using NULL (global ldap config) instead of ldap handle (per
1733 session). Bug diagnosis and testing by alxgomz.
1735 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1736 the src/util/ subdirectory.
1738 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1739 renamed to Transport Post Delivery Action by Jeremy Harris, as
1742 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1743 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1744 redis_servers = needs to be configured which will be used by the redis
1745 lookup. Patch from Warren Baker, of The Packet Hub.
1747 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1749 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1750 hostname or reverse DNS when processing a host list. Used suggestions
1751 from multiple comments on this bug.
1753 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1755 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1756 Missed a few lines, added it to make the runtest require no keyboard
1759 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1760 contains upper case chars. Make router use caseful_local_part.
1762 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1763 support when GnuTLS has been built with p11-kit.
1769 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1771 This, or similar/improved, will also be change PP/11 of 4.82.
1777 PP/01 Handle short writes when writing local log-files.
1778 In practice, only affects FreeBSD (8 onwards).
1779 Bugzilla 1053, with thanks to Dmitry Isaikin.
1781 NM/01 Bugzilla 949 - Documentation tweak
1783 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1786 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1788 PP/02 Implemented gsasl authenticator.
1790 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1792 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1793 `pkg-config foo` for cflags/libs.
1795 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1796 with rest of GSASL and with heimdal_gssapi.
1798 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1799 `pkg-config foo` for cflags/libs for the TLS implementation.
1801 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1802 properties get this fed in as external SSF. A number of robustness
1803 and debugging improvements to the cyrus_sasl authenticator.
1805 PP/08 cyrus_sasl server now expands the server_realm option.
1807 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1808 Patch by Jeremy Harris.
1810 PP/10 Added dbmjz lookup type.
1812 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1814 PP/12 MAIL args handles TAB as well as SP, for better interop with
1815 non-compliant senders.
1816 Analysis and variant patch by Todd Lyons.
1818 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1819 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1820 Patch from Dirk Mueller <dmueller@suse.com>
1822 PP/13 tls_peerdn now print-escaped for spool files.
1823 Observed some $tls_peerdn in wild which contained \n, which resulted
1824 in spool file corruption.
1826 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1827 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1828 or write after TLS renegotiation, which otherwise led to messages
1831 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1832 as a tracking header (ie: a signed header comes before the signature).
1833 Patch from Wolfgang Breyha.
1835 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1836 comma-sep list; embedded commas doubled.
1838 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1840 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1842 Report and patch from Dmitry Banschikov.
1844 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1845 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1846 failures. We appear to now support TLS1.1+ with Exim.
1848 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1849 lets Exim select keys and certificates based upon TLS SNI from client.
1850 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1851 before an outbound SMTP session. New log_selector, +tls_sni.
1853 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1854 NULL dereference. Report and patch from Alun Jones.
1856 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1857 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1858 Not seeing resolver debug output on NetBSD, but suspect this is a
1859 resolver implementation change.
1861 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1862 Left warnings. Added "eximon gdb" invocation mode.
1864 PP/21 Defaulting "accept_8bitmime" to true, not false.
1866 PP/22 Added -bw for inetd wait mode support.
1868 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1869 locate the relevant includes and libraries. Made this the default.
1871 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1872 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1874 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1875 This may cause build issues on older platforms.
1877 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1878 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1879 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1880 Added SNI support via GnuTLS too.
1881 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1883 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1885 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1886 Applied second patch from Janne, implementing suggestion to default
1887 multiple-strings-in-record handling to match SPF spec.
1889 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1891 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1892 read-only, out of scope).
1893 Patch from Wolfgang Breyha, report from Stuart Northfield.
1895 PP/29 Fix three issues highlighted by clang analyser static analysis.
1896 Only crash-plausible issue would require the Cambridge-specific
1897 iplookup router and a misconfiguration.
1898 Report from Marcin Mirosław.
1900 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1902 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1903 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1904 As part of this, removing so much warning spew let me fix some minor
1905 real issues in debug logging.
1907 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1908 assignment on my part. Fixed.
1910 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1911 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1912 Janne Snabb (who went above and beyond: thank you).
1914 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1915 string otherwise requires a connection and a bunch more work and it's
1916 relatively easy to get wrong. Should also expose TLS library linkage
1919 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1920 64-bit ${eval} (JH/03).
1922 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1923 GNU libc to support some of the 64-bit stuff, should not lead to
1924 conflicts. Defined before os.h is pulled in, so if a given platform
1925 needs to override this, it can.
1927 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1928 protection layer was required, which is not implemented.
1929 Bugzilla 1254, patch from Wolfgang Breyha.
1931 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1932 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1933 tls_dhparam take prime identifiers. Also unbreak combination of
1934 OpenSSL+DH_params+TLSSNI.
1936 PP/39 Disable SSLv2 by default in OpenSSL support.
1942 PP/01 Solaris build fix for Oracle's LDAP libraries.
1943 Bugzilla 1109, patch from Stephen Usher.
1945 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1947 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1950 TF/02 Fix a couple more cases where we did not log the error message
1951 when unlink() failed. See also change 4.74-TF/03.
1953 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1954 lock up or crash if it happened to be inside a call to libc when it
1955 got a SIGUSR1 from exiwhat.
1957 The SIGUSR1 handler appends the current process status to the process
1958 log which is later printed by exiwhat. It used to use the general
1959 purpose logging code to do this, but several functions it calls are
1960 not safe for signals.
1962 The new output code in the SIGUSR1 handler is specific to the process
1963 log, and simple enough that it's easy to inspect for signal safety.
1964 Removing some special cases also simplifies the general logging code.
1965 Removing the spurious timestamps from the process log simplifies
1968 TF/04 Improved ratelimit ACL condition.
1970 The /noupdate option has been deprecated in favour of /readonly which
1971 has clearer semantics. The /leaky, /strict, and /readonly update modes
1972 are mutually exclusive. The update mode is no longer included in the
1973 database key; it just determines when the database is updated. (This
1974 means that when you upgrade Exim will forget old rate measurements.)
1976 Exim now checks that the per_* options are used with an update mode that
1977 makes sense for the current ACL. For example, when Exim is processing a
1978 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1979 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1980 must specify per_mail/readonly. If you omit the update mode it defaults to
1981 /leaky where that makes sense (as before) or /readonly where required.
1983 The /noupdate option is now undocumented but still supported for
1984 backwards compatibility. It is equivalent to /readonly except that in
1985 ACLs where /readonly is required you may specify /leaky/noupdate or
1986 /strict/noupdate which are treated the same as /readonly.
1988 A useful new feature is the /count= option. This is a generalization
1989 of the per_byte option, so that you can measure the throughput of other
1990 aggregate values. For example, the per_byte option is now equivalent
1991 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1993 The per_rcpt option has been generalized using the /count= mechanism
1994 (though it's more complicated than the per_byte equivalence). When it is
1995 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1996 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1997 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1998 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1999 Note that using per_rcpt with a non-readonly update mode in more than
2000 one ACL will cause the recipients to be double-counted. (The per_mail
2001 and per_byte options don't have this problem.)
2003 The handling of very low rates has changed slightly. If the computed rate
2004 is less than the event's count (usually one) then this event is the first
2005 after a long gap. In this case the rate is set to the same as this event's
2006 count, so that the first message of a spam run is counted properly.
2008 The major new feature is a mechanism for counting the rate of unique
2009 events. The new per_addr option counts the number of different
2010 recipients that someone has sent messages to in the last time period. It
2011 behaves like per_rcpt if all the recipient addresses are different, but
2012 duplicate recipient addresses do not increase the measured rate. Like
2013 the /count= option this is a general mechanism, so the per_addr option
2014 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2015 example, measure the rate that a client uses different sender addresses
2016 with the options per_mail/unique=$sender_address. There are further
2017 details in the main documentation.
2019 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2021 TF/06 Removed a few PCRE remnants.
2023 TF/07 Automatically extract Exim's version number from tags in the git
2024 repository when doing development or release builds.
2026 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2027 Bugzilla 879. Patch from Paul Fisher.
2029 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2030 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2033 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2035 PP/05 Variable $av_failed, true if the AV scanner deferred.
2036 Bugzilla 1078. Patch from John Horne.
2038 PP/06 Stop make process more reliably on build failure.
2039 Bugzilla 1087. Patch from Heiko Schlittermann.
2041 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2042 Bugzilla 1089. Patch from Heiko Schlittermann.
2044 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2045 Bugzilla 1131. Patch from Holger Weiß.
2047 PP/09 Handle IPv6 addresses with SPF.
2048 Bugzilla 860. Patch from Wolfgang Breyha.
2050 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2052 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2055 PP/11 match_* no longer expand right-hand-side by default.
2056 New compile-time build option, EXPAND_LISTMATCH_RHS.
2057 New expansion conditions, "inlist", "inlisti".
2059 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2061 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2063 PP/14 fix log_write() format string regression from TF/03.
2064 Bugzilla 1152. Patch from Dmitry Isaikin.
2070 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2072 PP/02 Harmonised TLS library version reporting; only show if debugging.
2073 Layout now matches that introduced for other libraries in 4.74 PP/03.
2075 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2077 PP/04 New "dns_use_edns0" global option.
2079 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2082 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2083 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2085 TK/01 Updated PolarSSL code to 0.14.2.
2086 Bugzilla 1097. Patch from Andreas Metzler.
2088 PP/07 Catch divide-by-zero in ${eval:...}.
2089 Fixes bugzilla 1102.
2091 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2094 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2095 format-string attack -- SECURITY: remote arbitrary code execution.
2097 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2098 time unintentionally subject to list matching rules, letting the header
2099 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2100 arbitrary string expansion). This allowed for information disclosure.
2102 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2103 INT_MIN/-1 -- value coerced to INT_MAX.
2109 NM/01 Workaround for PCRE version dependency in version reporting
2112 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2113 This fixes portability to compilers other than gcc, notably
2114 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2116 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2117 makefiles for portability to HP-UX and POSIX correctness.
2119 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2120 Also via indented variable definition in the Makefile.
2121 (Debugging by Oliver Heesakkers).
2123 PP/02 Restore caching of spamd results with expanded spamd_address.
2124 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2126 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2127 Improves build reliability. Fix from: Frank Elsner
2129 NM/02 Fix wide character breakage in the rfc2047 coding
2130 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2132 NM/03 Allow underscore in dnslist lookups
2133 Fixes bug 1026. Patch from Graeme Fowler
2135 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2136 Code patches from Adam Ciarcinski of NetBSD.
2138 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2141 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2142 is logged, to avoid truncation. Patch from John Horne.
2144 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2145 Patch from Jakob Hirsch.
2147 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2148 SQL string expansion failure details.
2149 Patch from Andrey Oktyabrski.
2151 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2152 Patch from Simon Arlott.
2154 PP/09 New lookups functionality failed to compile on old gcc which rejects
2155 extern declarations in function scope.
2156 Patch from Oliver Fleischmann
2158 PP/10 Use sig_atomic_t for flags set from signal handlers.
2159 Check getgroups() return and improve debugging.
2160 Fixed developed for diagnosis in bug 927 (which turned out to be
2163 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2164 Patch from Mark Zealey.
2166 PP/12 Bugzilla 1056: Improved spamd server selection.
2167 Patch from Mark Zealey.
2169 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2170 Based on patch from Heiko Schlittermann.
2172 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2173 Patch from Uwe Doering, sign-off by Michael Haardt.
2175 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2176 variable declaration deep within a block. Bug and patch from
2179 PP/15 lookups-Makefile IRIX compatibility coercion.
2181 PP/16 Make DISABLE_DKIM build knob functional.
2183 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2184 Patch by Simon Arlott
2186 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2187 variable argument macros. Our copy now differs from upstream.
2193 TF/01 Failure to get a lock on a hints database can have serious
2194 consequences so log it to the panic log.
2196 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2197 controlled using the smtp_confirmation log selector.
2199 TF/03 Include the error message when we fail to unlink a spool file.
2201 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2202 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2203 for maintaining out-of-tree patches for some time.
2205 PP/01 Bugzilla 139: Documentation and portability issues.
2206 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2207 Handle per-OS dynamic-module compilation flags.
2209 PP/02 Let /dev/null have normal permissions.
2210 The 4.73 fixes were a little too stringent and complained about the
2211 permissions on /dev/null. Exempt it from some checks.
2212 Reported by Andreas M. Kirchwitz.
2214 PP/03 Report version information for many libraries, including
2215 Exim version information for dynamically loaded libraries. Created
2216 version.h, now support a version extension string for distributors
2217 who patch heavily. Dynamic module ABI change.
2219 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2220 privilege escalation vulnerability whereby the Exim run-time user
2221 can cause root to append content of the attacker's choosing to
2224 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2227 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2228 If dropping privileges for untrusted macros, we disabled normal logging
2229 on the basis that it would fail; for the Exim run-time user, this is not
2230 the case, and it resulted in successful deliveries going unlogged.
2231 Fixed. Reported by Andreas Metzler.
2237 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2238 only prepend for the Resent-* case. Fixes regression introduced in
2239 Exim 4.70 by NM/22 for Bugzilla 607.
2241 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2242 increasing numbers of administrators be bitten by this.
2244 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2246 PP/03 Bugzilla 994: added openssl_options main configuration option.
2248 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2250 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2252 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2254 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2255 without a peer certificate, leading to a segfault because of an
2256 assumption that peers always have certificates. Be a little more
2257 paranoid. Problem reported by Martin Tscholak.
2259 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2260 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2261 NB: ClamAV planning to remove STREAM in "middle of 2010".
2262 CL also introduces -bmalware, various -d+acl logging additions and
2263 more caution in buffer sizes.
2265 PP/09 Implemented reverse_ip expansion operator.
2267 PP/10 Bugzilla 937: provide a "debug" ACL control.
2269 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2271 PP/12 Bugzilla 973: Implement --version.
2273 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2275 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2277 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2279 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2280 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2281 ignore trailing whitespace.
2283 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2285 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2288 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2289 Notification from Dr Andrew Aitchison.
2291 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2292 ExtendedDetectionInfo response format.
2293 Notification from John Horne.
2295 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2298 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2299 XSL and documented dependency on system catalogs, with examples of how
2302 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2305 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2306 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2307 configuration file which is writeable by the Exim user or group.
2309 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2310 of configuration files to cover files specified with the -C option if
2311 they are going to be used with root privileges, not just the default
2314 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2315 option (effectively making it always true).
2317 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2318 files to be used while preserving root privileges.
2320 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2321 that rogue child processes cannot use them.
2323 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2324 run-time user, instead of root.
2326 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2327 Exim run-time user without dropping privileges.
2329 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2330 result string, instead of calling string_vformat() twice with the same
2333 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2334 for other users. Others should always drop root privileges if they use
2335 -C on the command line, even for a whitelisted configure file.
2337 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2339 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2345 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2346 $data_path, and $header_path variables; fixed documentation bugs and
2349 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2350 exipick to access non-standard spools, including the "frozen" queue
2353 NM/01 Bugzilla 965: Support mysql stored procedures.
2354 Patch from Alain Williams
2356 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2358 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2359 Patch from Andreas Metzler
2361 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2362 Patch from Kirill Miazine
2364 NM/05 Bugzilla 671: Added umask to procmail example.
2366 JJ/03 installed exipick 20100323.0, fixing doc bug
2368 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2369 directory. Notification and patch from Dan Rosenberg.
2371 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2373 TK/02 Improve log output when DKIM signing operation fails.
2375 MH/01 Treat the transport option dkim_domain as a colon separated
2376 list, not as a single string, and sign the message with each element,
2377 omitting multiple occurences of the same signer.
2379 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2380 Bugzilla 985, 986. Patch by Simon Arlott
2382 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2383 Patch by Simon Arlott
2385 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2386 MBX locking. Notification from Dan Rosenberg.
2392 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2394 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2396 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2398 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2400 NM/04 Bugzilla 915: Flag broken perl installation during build.
2406 TK/01 Added patch by Johannes Berg that expands the main option
2407 "spamd_address" if it starts with a dollar sign.
2409 TK/02 Write list of recipients to X-Envelope-Sender header when building
2410 the mbox-format spool file for content scanning (suggested by Jakob
2413 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2414 (http://www.dcc-servers.net/) support via dccifd. Activated by
2415 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2417 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2418 by Mark Daniel Reidel <mr@df.eu>.
2420 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2421 When building exim an external PCRE library is now needed -
2422 PCRE is a system library on the majority of modern systems.
2423 See entry on PCRE_LIBS in EDITME file.
2425 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2426 conversation. Added nologin parameter to request.
2427 Patch contributed by Kirill Miazine.
2429 TF/01 Do not log submission mode rewrites if they do not change the address.
2431 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2433 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2434 log files in place. Contributed by Roberto Lima.
2436 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2438 TF/03 Bugzilla 615: When checking the local_parts router precondition
2439 after a local_part_suffix or local_part_prefix option, Exim now
2440 does not use the address's named list lookup cache, since this
2441 contains cached lookups for the whole local part.
2443 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2444 Robert Millan. Documentation is in experimental-spec.txt.
2446 TF/04 Bugzilla 668: Fix parallel build (make -j).
2448 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2450 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2451 Patch provided by Jan Srzednicki.
2453 TF/05 Leading white space used to be stripped from $spam_report which
2454 wrecked the formatting. Now it is preserved.
2456 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2457 that they are available at delivery time.
2459 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2461 TF/08 TLS error reporting now respects the incoming_interface and
2462 incoming_port log selectors.
2464 TF/09 Produce a more useful error message if an SMTP transport's hosts
2465 setting expands to an empty string.
2467 NM/06 Bugzilla 744: EXPN did not work under TLS.
2468 Patch provided by Phil Pennock.
2470 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2471 Patch provided by Richard Godbee.
2473 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2474 acl_smtp_notquit, added index entry.
2476 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2477 Patch provided by Eugene Bujak.
2479 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2480 accept(). Patch provided by Maxim Dounin.
2482 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2483 Patch provided by Phil Pennock.
2485 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2487 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2488 Patch provided by Brad "anomie" Jorsch.
2490 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2491 Patch provided by Dean Brooks.
2493 TK/05 Add native DKIM support (does not depend on external libraries).
2495 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2496 Patch provided by Graeme Fowler.
2498 NM/16 Bugzilla 851: Documentation example syntax fix.
2500 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2502 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2505 NM/19 Bugzilla 745: TLS version reporting.
2506 Patch provided by Phil Pennock.
2508 NM/20 Bugzilla 167: bool: condition support.
2509 Patch provided by Phil Pennock.
2511 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2512 clients. Patch provided by Phil Pennock.
2514 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2515 Patch provided by Brad "anomie" Jorsch.
2517 NM/23 Bugzilla 687: Fix misparses in eximstats.
2518 Patch provided by Heiko Schlittermann.
2520 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2521 Patch provided by Heiko Schlittermann.
2523 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2524 plus update to original patch.
2526 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2528 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2529 Patch provided by David Brownlee.
2531 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2533 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2535 NM/30 Bugzilla 888: TLS documentation bugfixes.
2537 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2539 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2540 Unlike the original bugzilla I have changed all shell scripts in src tree.
2542 NM/33 Bugzilla 898: Transport filter timeout fix.
2543 Patch by Todd Rinaldo.
2545 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2546 Patch by Serge Demonchaux.
2548 NM/35 Bugzilla 39: Base64 decode bug fixes.
2549 Patch by Jakob Hirsch.
2551 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2553 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2555 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2557 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2563 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2564 ALT-N's libdkim that I have put here:
2565 http://duncanthrax.net/exim-experimental/
2567 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2568 were called 'true' and it seems that C99 defines that as a reserved
2569 keyword to be used with 'bool' variable types. That means you could
2570 not include C99-style headers which use bools without triggering
2571 build errors in sieve.c.
2573 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2574 as mailq or other aliases. Changed the --help handling significantly
2575 to do whats expected. exim_usage() emits usage/help information.
2577 SC/01 Added the -bylocaldomain option to eximstats.
2579 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2581 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2583 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2589 PH/01 Another patch from the Sieve maintainer.
2591 PH/02 When an IPv6 address is converted to a string for single-key lookup
2592 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2593 dots are used instead of colons so that keys in lsearch files need not
2594 contain colons. This was done some time before quoting was made available
2595 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2596 (notated using the quote facility) so as to distinguish them from IPv4
2597 keys. This meant that lookups for IP addresses in host lists did not work
2598 for iplsearch lookups.
2600 This has been fixed by arranging for IPv6 addresses to be expressed with
2601 colons if the lookup type is iplsearch. This is not incompatible, because
2602 previously such lookups could never work.
2604 The situation is now rather anomalous, since one *can* have colons in
2605 ordinary lsearch keys. However, making the change in all cases is
2606 incompatible and would probably break a number of configurations.
2608 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2611 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2612 conversion specification without a maximum field width, thereby enabling
2613 a rogue spamd server to cause a buffer overflow. While nobody in their
2614 right mind would setup Exim to query an untrusted spamd server, an
2615 attacker that gains access to a server running spamd could potentially
2616 exploit this vulnerability to run arbitrary code as the Exim user.
2618 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2619 $primary_hostname instead of what libspf2 thinks the hosts name is.
2621 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2622 a directory entry by the name of the lookup key. Previously, if a
2623 symlink pointed to a non-existing file or a file in a directory that
2624 Exim lacked permissions to read, a lookup for a key matching that
2625 symlink would fail. Now it is enough that a matching directory entry
2626 exists, symlink or not. (Bugzilla 503.)
2628 PH/03 The body_linecount and body_zerocount variables are now exported in the
2631 PH/04 Added the $dnslist_matched variable.
2633 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2634 This means they are set thereafter only if the connection becomes
2637 PH/06 Added the client_condition to authenticators so that some can be skipped
2638 by clients under certain conditions.
2640 PH/07 The error message for a badly-placed control=no_multiline_responses left
2641 "_responses" off the end of the name.
2643 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2645 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2646 (without spaces) instead of just copying the configuration text.
2648 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2650 PH/11 Added $max_received_linelength.
2652 PH/12 Added +ignore_defer and +include_defer to host lists.
2654 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2655 way in which PCRE > 7.0 is built.
2657 PH/14 Implemented queue_only_load_latch.
2659 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2660 MAIL command. The effect was to mangle the value on 64-bit systems.
2662 PH/16 Another patch from the Sieve maintainer.
2664 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2666 PH/18 If a system quota error occurred while trying to create the file for
2667 a maildir delivery, the message "Mailbox is full" was not appended to the
2668 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2669 only to a quota excession during the actual writing of the file.
2671 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2672 characters?) which causes problems in log lines. The DN values are now
2673 passed through string_printing() before being added to log lines.
2675 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2676 and InterBase are left for another time.)
2678 PH/21 Added message_body_newlines option.
2680 PH/22 Guard against possible overflow in moan_check_errorcopy().
2682 PH/23 POSIX allows open() to be a macro; guard against that.
2684 PH/24 If the recipient of an error message contained an @ in the local part
2685 (suitably quoted, of course), incorrect values were put in $domain and
2686 $local_part during the evaluation of errors_copy.
2692 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2693 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2696 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2697 issue a MAIL command.
2699 PH/02 In an ACL statement such as
2701 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2703 if a client was not listed at all, or was listed with a value other than
2704 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2705 the condition was not true (as it should be), so access was not denied.
2706 The bug was that the ! inversion was incorrectly passed on to the second
2707 item. This has been fixed.
2709 PH/03 Added additional dnslists conditions == and =& which are different from
2710 = and & when the dns lookup returns more than one IP address.
2712 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2713 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2715 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2716 FSYNC, which compiles an option called disable_fsync that allows for
2717 bypassing fsync(). The documentation is heavily laced with warnings.
2719 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2721 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2722 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2723 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2724 including adding "make clean"; (3) Added -fPIC when compiling the test
2725 dynamically loaded module, to get rid of a warning.
2727 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2728 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2729 = 0s. The bug is otherwise harmless.
2731 PH/07 There was a bug in the dovecot authenticator such that the value of
2732 $auth1 could be overwritten, and so not correctly preserved, after a
2733 successful authentication. This usually meant that the value preserved by
2734 the server_setid option was incorrect.
2736 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2738 PH/09 Installed PCRE release 7.0.
2740 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2741 run for batched SMTP input. It is now run at the start of every message
2742 in the batch. While fixing this I discovered that the process information
2743 (output by running exiwhat) was not always getting set for -bs and -bS
2744 input. This is fixed, and it now also says "batched" for BSMTP.
2746 PH/11 Added control=no_pipelining.
2748 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2749 patch, slightly modified), and move the expansion of helo_data till after
2750 the connection is made in the smtp transport (so it can use these
2753 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2755 PH/14 Added log_selector = +pid.
2757 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2759 PH/16 Add ${if forany and ${if forall.
2761 PH/17 Added dsn_from option to vary the From: line in DSNs.
2763 PH/18 Flush SMTP output before performing a callout, unless control =
2764 no_callout_flush is set.
2766 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2767 was true (the default) a successful delivery failed to delete the retry
2768 item, thus causing premature timeout of the address. The bug is now
2771 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2773 PH/21 Long custom messages for fakedefer and fakereject are now split up
2774 into multiline responses in the same way that messages for "deny" and
2775 other ACL rejections are.
2777 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2778 with slight modification.
2780 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2781 draft, changing the syntax and factoring some duplicate code".
2783 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2784 for deliveries of the second and subsequent messages over the same SMTP
2787 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2788 ${reduce, with only minor "tidies".
2790 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2792 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2793 expansion side effects.
2795 PH/27 When a message times out after an over-quota error from an Exim-imposed
2796 quota, the bounce message says "mailbox is full". This message was not
2797 being given when it was a system quota that was exceeded. It now should
2800 MH/03 Made $recipients available in local_scan(). local_scan() already has
2801 better access to the recipient list through recipients_list[], but
2802 $recipients can be useful in postmaster-provided expansion strings.
2804 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2805 in the case of a MAIL command with additional options following the
2806 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2807 were accidentally chopped off.
2809 PH/29 SMTP synchronization checks are implemented when a command is read -
2810 there is a check that no more input is waiting when there shouldn't be
2811 any. However, for some commands, a delay in an ACL can mean that it is
2812 some time before the response is written. In this time, more input might
2813 arrive, invalidly. So now there are extra checks after an ACL has run for
2814 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2815 pipelining has not been advertised.
2817 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2819 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2820 returned in the SMTP response when smtp_return_error_details was false.
2821 This has been fixed.
2823 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2824 instead of the C I/O that was originally supplied, because problems were
2825 reported on Solaris.
2827 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2828 Exim which did not show up earlier: it was assuming that a call to
2829 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2830 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2831 was a macro that became an assignment, so it seemed to work. This has
2832 changed to a proper function call with a void return, hence the compile
2833 error. Exim's code has been fixed.
2835 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2838 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2840 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2842 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2843 because it turns out to be too big or there is a timeout) there is no
2844 "Completed" line in the log. When some messages of this type were
2845 selected by exigrep, they were listed as "not completed". Others were
2846 picked up by some special patterns. I have improved the selection
2847 criteria to be more general.
2849 PH/38 The host_find_failed option in the manualroute router can now be set
2850 to "ignore", to completely ignore a host whose IP address cannot be
2851 found. If all hosts are ignored, the behaviour is controlled by the new
2852 host_all_ignored option.
2854 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2855 homing or because of multiple MX records with /mx) generated more than
2856 one IP address, and the following item turned out to be the local host,
2857 all the secondary addresses of the first item were incorrectly removed
2858 from the list, along with the local host and any following hosts (which
2859 is what is supposed to happen).
2861 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2862 whoever called Exim into the -H file. In the case of the daemon it was
2863 behaving confusingly. When first started, it used values for whoever
2864 started the daemon, but after a SIGHUP it used the Exim user (because it
2865 calls itself on a restart). I have changed the code so that it now always
2868 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2869 message are rejected with the same error (e.g. no authentication or bad
2870 sender address), and a DATA command is nevertheless sent (as can happen
2871 with PIPELINING or a stupid MUA), the error message that was given to the
2872 RCPT commands is included in the rejection of the DATA command. This is
2873 intended to be helpful for MUAs that show only the final error to their
2876 PH/42 Another patch from the Sieve maintainer.
2878 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2879 Eximstats - Fixed some broken HTML links and added missing column headers
2881 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2882 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2884 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2886 PH/43 Yet another patch from the Sieve maintainer.
2888 PH/44 I found a way to check for a TCP/IP connection going away before sending
2889 the response to the final '.' that terminates a message, but only in the
2890 case where the client has not sent further data following the '.'
2891 (unfortunately, this is allowed). However, in many cases there won't be
2892 any further data because there won't be any more messages to send. A call
2893 to select() can be used: if it shows that the input is "ready", there is
2894 either input waiting, or the socket has been closed. An attempt to read
2895 the next input character can distinguish the two cases. Previously, Exim
2896 would have sent an OK response which the client would never have see.
2897 This could lead to message repetition. This fix should cure that, at
2898 least in a lot of common cases.
2900 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2901 advertised in response to EHLO.
2907 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2908 fixed by 4.65/MH/01 (is this a record?) are fixed:
2910 (i) An empty string was always treated as zero by the numeric comparison
2911 operators. This behaviour has been restored.
2913 (ii) It is documented that the numeric comparison operators always treat
2914 their arguments as decimal numbers. This was broken in that numbers
2915 starting with 0 were being interpreted as octal.
2917 While fixing these problems I realized that there was another issue that
2918 hadn't been noticed. Values of message_size_limit (both the global option
2919 and the transport option) were treated as octal if they started with 0.
2920 The documentation was vague. These values are now always treated as
2921 decimal, and I will make that clear in the documentation.
2927 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2928 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2931 MH/01 Don't check that the operands of numeric comparison operators are
2932 integers when their expansion is in "skipping" mode (fixes bug
2933 introduced by 4.64-PH/07).
2935 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2936 child addresses, Exim now panics and dies. Previously, because the count
2937 is held in a short int, deliveries were likely to be lost. As such a
2938 large number of recipients for a single message is ridiculous
2939 (performance will be very, very poor), I have chosen to impose a limit
2940 rather than extend the field.
2946 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2947 leftover -K file (the existence of which was triggered by #402).
2948 While we were at it, introduced process PID as part of the -K
2949 filename. This should rule out race conditions when creating
2952 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2953 processing considerably. Previous code took too long for large mails,
2954 triggering a timeout which in turn triggers #401.
2956 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2957 in the DK code in transports.c. sendfile() is not really portable,
2958 hence the _LINUX specificness.
2960 TF/01 In the add_headers option to the mail command in an Exim filter,
2961 there was a bug that Exim would claim a syntax error in any
2962 header after the first one which had an odd number of characters
2965 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2966 callout verification, Exim cached a "reject" for the entire domain. This
2967 is correct for most verifications, but it is not correct for a recipient
2968 verification with use_sender or use_postmaster set, because in that case
2969 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2970 case of MAIL FROM:<> rejection from other early rejections (e.g.
2971 rejection of HELO). When verifying a recipient using a non-null MAIL
2972 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2973 Whatever the result of the callout, the value of the domain cache is
2974 left unchanged (for any other kind of callout, getting as far as trying
2975 RCPT means that the domain itself is ok).
2977 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2980 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2981 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2982 session, the daemon ignores ECONNECT errors and logs others; it now
2983 ignores EPIPE as well.
2985 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2986 (quoted-printable decoding).
2988 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2989 later the small subsequent patch to fix an introduced bug.
2991 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2993 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2995 PH/08 An error is now given if message_size_limit is specified negative.
2997 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2998 to be given (somewhat) arbitrary names.
3000 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3003 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3004 miscellaneous code fixes
3006 PH/10 Added the log_reject_target ACL modifier to specify where to log
3009 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3010 hostname. This is wrong, because it relates to the incoming message (and
3011 probably the interface on which it is arriving) and not to the outgoing
3012 callout (which could be using a different interface). This has been
3013 changed to use the value of the helo_data option from the smtp transport
3014 instead - this is what is used when a message is actually being sent. If
3015 there is no remote transport (possible with a router that sets up host
3016 addresses), $smtp_active_hostname is used.
3018 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3019 tweaks were necessary in order to get it to work (see also 21 below):
3020 (a) The code assumed that strncpy() returns a negative number on buffer
3021 overflow, which isn't the case. Replaced with Exim's string_format()
3023 (b) There were several signed/unsigned issues. I just did the minimum
3024 hacking in of casts. There is scope for a larger refactoring.
3025 (c) The code used strcasecmp() which is not a standard C function.
3026 Replaced with Exim's strcmpic() function.
3027 (d) The code set only $1; it now sets $auth1 as well.
3028 (e) A simple test gave the error "authentication client didn't specify
3029 service in request". It would seem that Dovecot has changed its
3030 interface. Fortunately there's a specification; I followed it and
3031 changed what the client sends and it appears to be working now.
3033 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3036 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3037 address A is aliased to B and C, where B exists and C does not. Without
3038 -v the output is "A verified" because verification stops after a
3039 successful redirection if more than one address is generated. However,
3040 with -v the child addresses are also verified. Exim was outputting "A
3041 failed to verify" and then showing the successful verification for C,
3042 with its parentage. It now outputs "B failed to verify", showing B's
3043 parentage before showing the successful verification of C.
3045 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3046 look up a TXT record in a specific list after matching in a combined
3049 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3050 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3051 they consult the DNS. I had assumed they would set it the way they
3052 wanted; and indeed my experiments on Linux seem to show that in some
3053 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3054 To be on the safe side, however, I have now made the interface to
3055 host_find_byname() similar to host_find_bydns(), with an argument
3056 containing the DNS resolver options. The host_find_byname() function now
3057 sets these options at its start, just as host_find_bydns() does. The smtp
3058 transport options dns_qualify_single and dns_search_parents are passed to
3059 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3060 of host_find_byname() use the default settings of RES_DEFNAMES
3061 (qualify_single) but not RES_DNSRCH (search_parents).
3063 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3064 spool_read_header() do less string testing, by means of a preliminary
3065 switch on the second character of optional "-foo" lines. (This is
3066 overdue, caused by the large number of possibilities that now exist.
3067 Originally there were few.) While I was there, I also converted the
3068 str(n)cmp tests so they don't re-test the leading "-" and the first
3069 character, in the hope this might squeeze out yet more improvement.
3071 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3072 flag allowing group syntax was set by the header_syntax check but not
3073 turned off, possible causing trouble later; (2) The flag was not being
3074 set at all for the header_verify test, causing "group"-style headers to
3075 be rejected. I have now set it in this case, and also caused header_
3076 verify to ignore an empty address taken from a group. While doing this, I
3077 came across some other cases where the code for allowing group syntax
3078 while scanning a header line wasn't quite right (mostly, not resetting
3079 the flag correctly in the right place). These bugs could have caused
3080 trouble for malformed header lines. I hope it is now all correct.
3082 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3083 with the "reply" argument non-NULL. The code, however (which originally
3084 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3085 but it didn't always do it. This confused somebody who was copying the
3086 code for some other use. I have removed all the tests.
3088 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3089 feature that was used to support insecure browsers during the U.S. crypto
3090 embargo. It requires special client support, and Exim is probably the
3091 only MTA that supported it -- and would never use it because real RSA is
3092 always available. This code has been removed, because it had the bad
3093 effect of slowing Exim down by computing (never used) parameters for the
3094 RSA_EXPORT functionality.
3096 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3097 authenticator to fail if there's a tab character in the incoming data
3098 (there should never be unless someone is messing about, as it's supposed
3099 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3100 if the connection is using TLS or if the remote IP is the same as the
3101 local IP, and the "valid-client-cert option" if a client certificate has
3104 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3105 authenticators. This can be used for authorization after authentication
3106 succeeds. (In the case of plaintext, it servers for both authentication
3109 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3110 if any retry times were supplied.
3112 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3113 connection, where there is no client IP address to check. In this
3114 situation, the verify now always succeeds.
3116 PH/25 Applied John Jetmore's -Mset patch.
3118 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3120 PH/27 In a string expansion for a processed (not raw) header when multiple
3121 headers of the same name were present, leading whitespace was being
3122 removed from all of them, but trailing whitespace was being removed only
3123 from the last one. Now trailing whitespace is removed from each header
3124 before concatenation. Completely empty headers in a concatenation (as
3125 before) are ignored.
3127 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3128 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3130 PH/29 [Removed. This was a change that I later backed out, and forgot to
3131 correct the ChangeLog entry (that I had efficiently created) before
3132 committing the later change.]
3134 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3135 address errors (4xx response to RCPT) over the same connection as other
3136 messages routed to the same hosts. Such deliveries are always "forced",
3137 so retry times are not inspected. This resulted in far too many retries
3138 for the affected addresses. The effect occurred only when there were more
3139 hosts than the hosts_max_try setting in the smtp transport when it had
3140 the 4xx errors. Those hosts that it had tried were not added to the list
3141 of hosts for which the message was waiting, so if all were tried, there
3142 was no problem. Two fixes have been applied:
3144 (i) If there are any address or message errors in an SMTP delivery, none
3145 of the hosts (tried or untried) are now added to the list of hosts
3146 for which the message is waiting, so the message should not be a
3147 candidate for sending over the same connection that was used for a
3148 successful delivery of some other message. This seems entirely
3149 reasonable: after all the message is NOT "waiting for some host".
3150 This is so "obvious" that I'm not sure why it wasn't done
3151 previously. Hope I haven't missed anything, but it can't do any
3152 harm, as the worst effect is to miss an optimization.
3154 (ii) If, despite (i), such a delivery is accidentally attempted, the
3155 routing retry time is respected, so at least it doesn't keep
3156 hammering the server.
3158 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3159 in ${readsocket because some servers need this prod.
3161 PH/32 Added some extra debug output when updating a wait-xxx database.
3163 PH/33 The hint "could be header name not terminated by colon", which has been
3164 given for certain expansion errors for a long time, was not being given
3165 for the ${if def:h_colon_omitted{... case.
3167 PH/34 The spec says: "With one important exception, whenever a domain list is
3168 being scanned, $domain contains the subject domain." There was at least
3169 one case where this was not true.
3171 PH/35 The error "getsockname() failed: connection reset by peer" was being
3172 written to the panic log as well as the main log, but it isn't really
3173 panic-worthy as it just means the connection died rather early on. I have
3174 removed the panic log writing for the ECONNRESET error when getsockname()
3177 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3178 runs only) independently of the message's sender address. This meant
3179 that, if the 4xx error was in fact related to the sender, a different
3180 message to the same recipient with a different sender could confuse
3181 things. In particular, this can happen when sending to a greylisting
3182 server, but other circumstances could also provoke similar problems.
3183 I have changed the default so that the retry time for these errors is now
3184 based a combination of the sender and recipient addresses. This change
3185 can be overridden by setting address_retry_include_sender=false in the
3188 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3189 remote server are returned as part of bounce messages. This was not
3190 happening for LMTP over a pipe (the lmtp transport), but now it is the
3191 same for both kinds of LMTP.
3193 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3194 in header lines that were in fact CNAMEs. This is no longer the case.
3196 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3197 and queue runs started by the daemon processed all messages. This has
3198 been fixed so that -R and -S can now usefully be given with -q<time>.
3200 PH/40 Import PCRE release 6.7 (fixes some bugs).
3202 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3204 PH/42 Give an error if -q is specified more than once.
3206 PH/43 Renamed the variables $interface_address and $interface_port as
3207 $received_ip_address and $received_port, to make it clear that these
3208 values apply to message reception, and not to the outgoing interface when
3209 a message is delivered. (The old names remain recognized, of course.)
3211 PH/44 There was no timeout on the connect() call when using a Unix domain
3212 socket in the ${readsocket expansion. There now is.
3214 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3215 be meaningful with "accept".
3217 SC/01 Eximstats V1.43
3218 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3220 SC/02 Eximstats V1.44
3221 Use a glob alias rather than an array ref in the generated
3222 parser. This improves both readability and performance.
3224 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3225 Collect SpamAssassin and rejection statistics.
3226 Don't display local sender or destination tables unless
3227 there is data to show.
3228 Added average volumes into the top table text output.
3230 SC/04 Eximstats V1.46
3231 Collect data on the number of addresses (recipients)
3232 as well as the number of messages.
3234 SC/05 Eximstats V1.47
3235 Added 'Message too big' to the list of mail rejection
3236 reasons (thanks to Marco Gaiarin).
3238 SC/06 Eximstats V1.48
3239 Mainlog lines which have GMT offsets and are too short to
3240 have a flag are now skipped.
3242 SC/07 Eximstats V1.49 (Alain Williams)
3243 Added the -emptyok flag.
3245 SC/08 Eximstats V1.50
3246 Fixes for obtaining the IP address from reject messages.
3248 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3249 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3250 whitespace changes from 4.64-PH/27
3252 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3255 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3256 are found, allow negative numbers in numeric criteria)
3258 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3260 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3261 to match changes made in 4.64-PH/43
3263 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3265 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3266 "domain" is actually an IP address, and force a failure. This locks out
3267 those revolvers/nameservers that support "A-for-A" lookups, in
3268 contravention of the specifications.
3270 PH/48 When a host name was looked up from an IP address, and the subsequent
3271 forward lookup of the name timed out, the host name was left in
3272 $sender_host_name, contrary to the specification.
3274 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3275 restricted to single-key lookups, Exim was not diagnosing an error if
3276 * or *@ was used with a query-style lookup.
3278 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3280 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3281 long ago, but noone interested enough thought of it. Let's just say that
3282 the "1.1" means that there are some new functions that weren't there at
3283 some point in the past.
3285 PH/51 Error processing for expansion failure of helo_data from an smtp
3286 transport during callout processing was broken.
3288 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3289 tested/used via the -bh/-bhc/-bs options.
3291 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3292 bug, fixed in subsequent PCRE releases).
3294 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3295 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3297 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3303 SC/01 Use a glob alias rather than an array ref in eximstats generated
3304 parser. This improves both readability and performance.
3306 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3307 Don't display local sender or destination tables in eximstats unless
3308 there is data to show.
3309 Added average volumes into the eximstats top table text output.
3311 SC/03 Collect data on the number of addresses (recipients) as well
3312 as the number of messages in eximstats.
3314 TF/01 Correct an error in the documentation for the redirect router. Exim
3315 does (usually) call initgroups() when daemonizing.
3317 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3318 with consistent privilege compared to when running as a daemon.
3320 TF/03 Note in the spec that $authenticated_id is not set for local
3321 submissions from trusted users.
3323 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3324 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3326 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3327 by adding some example configuration directives to the default
3328 configuration file. A little bit of work is required to uncomment the
3329 directives and define how usernames and passwords are checked, but
3330 there is now a framework to start from.
3332 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3333 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3334 without this. I don't know how relevant this is to other LDAP libraries.
3336 PH/02 Add the verb name to the "unknown ACL verb" error.
3338 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3340 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3342 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3343 directory not expanded when it should be if an expanded home directory
3344 was set for the address (which is overridden by the transport).
3346 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3349 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3350 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3351 because it is too late at that time, and has no effect.
3353 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3354 security issue with \' (bugzilla #107). I could not use the
3355 PQescapeStringConn() function, because it needs a PGconn value as one of
3358 PH/08 When testing addresses using -bt, indicate those final addresses that
3359 are duplicates that would not cause an additional delivery. At least one
3360 person was confused, thinking that -bt output corresponded to deliveries.
3361 (Suppressing duplicates isn't a good idea as you lose the information
3362 about possibly different redirections that led to the duplicates.)
3364 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3365 systems where poll() doesn't work, in particular OS X.
3367 PH/10 Added more information to debugging output for retry time not reached.
3369 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3370 operations in malware.c.
3372 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3375 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3376 syslog_duplication set false, log lines that would normally be written
3377 both the the main log and to the reject log were not written to syslog at
3380 PH/14 In the default configuration, change the use of "message" in ACL warn
3381 statements to "add_header".
3383 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3384 not followed by a command (e.g. "seen endif").
3386 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3387 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3390 PH/17 Added extra conditions to the default value of delay_warning_condition
3394 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3395 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3396 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3399 The Auto-Submitted: and various List- headers are standardised, whereas I
3400 don't think Precedence: ever was.
3402 PH/18 Refactored debugging code in route_finduser() to show more information,
3403 in particular, the error code if getpwnam() issues one.
3405 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3406 This is apparently needed in addition to the PH/07 change above to avoid
3407 any possible encoding problems.
3409 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3410 but not after initializing Perl.
3412 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3413 output them only if debugging. By default they are written stderr,
3414 apparently, which is not desirable.
3416 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3419 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3422 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3424 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3425 authenticated or an ident call has been made. Suppress the default
3426 values for $authenticated_id and $authenticated_sender (but permit -oMai
3427 and -oMas) when testing with -bh.
3429 PH/24 Re-jigged the order of the tests in the default configuration so that the
3430 tests for valid domains and recipients precede the DNS black list and CSA
3431 tests, on the grounds that those ones are more expensive.
3433 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3434 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3435 This bug exists in every version of Exim that I still have, right back to
3438 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3439 However, an attempt to turn on case-sensitivity in a regex key by
3440 including (?-i) didn't work because the subject string was already
3441 lowercased, and the effects were non-intuitive. It turns out that a
3442 one-line patch can be used to allow (?-i) to work as expected.
3448 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3449 other effects) broke the use of negated acl sub-conditions.
3451 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3454 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3455 "Deny" causes Exim to reject the incoming connection with a 554 error.
3456 Unfortunately, if there is a major crisis, such as a disk failure,
3457 tcp-wrappers gives "deny", whereas what one would like would be some
3458 kind of temporary error. A kludge has been added to help with this.
3459 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3460 554 error is used if errno is still zero or contains ENOENT (which occurs
3461 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3464 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3466 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3467 errors. Otherwise a message that provokes a temporary error (when other
3468 messages do not) can cause a whole host to time out.
3470 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3471 addresses were routed directly to files or pipes from a redirect router.
3472 File deliveries just didn't batch; pipe deliveries might have suffered
3475 PH/06 A failure to get a lock for a hints database would erroneously always say
3476 "Failed to get write lock", even when it was really a read lock.
3478 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3479 of 0600. This has been changed to use the value of the lockfile_mode
3480 option (which defaults to 0600).
3482 PH/08 Applied small patch from the Sieve maintainer.
3484 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3485 folder from quota calculations, a direct delivery into this folder messed
3486 up the contents of the maildirsize file. This was because the regex was
3487 used only to exclude .Trash (or whatever) when the size of the mailbox
3488 was calculated. There was no check that a delivery was happening into an
3489 excluded directory. This bug has been fixed by ignoring all quota
3490 processing for deliveries into excluded directories.
3492 PH/10 Added the maildirfolder_create_regex option to appendfile.
3498 PH/01 The code for finding all the local interface addresses on a FreeBSD
3499 system running IPv6 was broken. This may well have applied to all BSD
3500 systems, as well as to others that have similar system calls. The broken
3501 code found IPv4 interfaces correctly, but gave incorrect values for the
3502 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3503 that it would not match correctly against @[] and not recognize the IPv6
3506 PH/02 The ipliteral router was not recognizing addresses of the form user@
3507 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3509 PH/03 Added disable_ipv6.
3511 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3512 decoded form, because it is most often used to construct To: headers
3513 lines in autoreplies, and the decoded form may well be syntactically
3514 invalid. However, $reply_address has leading white space removed, and all
3515 newlines turned into spaces so that the autoreply transport does not
3518 PH/05 If group was specified without a user on a router, and no group or user
3519 was specified on a transport, the group from the router was ignored.
3521 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3522 for visible compile-time settings that can be used to change these
3523 numbers, for those that want even more. Backwards compatibility with old
3524 spool files has been maintained. However, going back to a previous Exim
3525 release will lost any variables that are in spool files.
3527 PH/07 Two small changes when running in the test harness: increase delay when
3528 passing a TCP/IP connection to a new process, in case the original
3529 process has to generate a bounce, and remove special handling of
3530 127.0.0.2 (sic), which is no longer necessary.
3532 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3533 be the same on different OS.
3535 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3538 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3539 whether --show-vars was specified or not
3541 JJ/02 exipick: Added support for new ACL variable spool format introduced
3544 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3545 syntactically invalid From: or Reply-to: line, and a filter used this to
3546 generate an autoreply, and therefore failed to obtain an address for the
3547 autoreply, Exim could try to deliver to a non-existent relative file
3548 name, causing unrelated and misleading errors. What now happens is that
3549 it logs this as a hard delivery error, but does not attempt to create a
3552 PH/11 The exinext utility has a -C option for testing purposes, but although
3553 the given file was scanned by exinext itself; it wasn't being passed on
3554 when Exim was called.
3556 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3557 an end-of-file indication when reading a command response.
3559 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3560 compiled. In many other places in Exim, IPv6 addresses are always
3561 recognized, so I have changed this. It also means that IPv4 domain
3562 literals of the form [IPV4:n.n.n.n] are now always recognized.
3564 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3565 used if the router is not running as root, for example, when verifying at
3566 ACL time, or when using -bh. The debugging output from this situation was
3567 non-existent - all you got was a failure to exec. I have made two
3570 (a) Failures to set uid/gid, the current directory, or a process leader
3571 in a subprocess such as that created by queryprogram now generate
3572 suitable debugging output when -d is set.
3574 (b) The queryprogram router detects when it is not running as root,
3575 outputs suitable debugging information if -d is set, and then runs
3576 the subprocess without attempting to change uid/gid.
3578 PH/15 Minor change to Makefile for building test_host (undocumented testing
3581 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3582 additional section of a DNS packet that returns MX or SRV records.
3583 Instead, it always explicitly searches for A/AAAA records. This avoids
3584 major problems that occur when a DNS server includes only records of one
3585 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3586 fixed another bug: if SRV records were looked up and the corresponding
3587 address records were *not* found in the additional section, the port
3588 values from the SRV records were lost.
3590 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3591 using the correct key (the original address) when searching the retry
3592 rules in order to find which one to use for generating the retry hint.
3594 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3595 adding the default one. Similarly, if it contains a Reply-To: header, the
3596 errors_reply_to option, if set, is not used.
3598 PH/19 When calculating a retry time, Exim used to measure the "time since
3599 failure" by looking at the "first failed" field in the retry record. Now
3600 it does not use this if it is later than than the arrival time of the
3601 message. Instead it uses the arrival time. This makes for better
3602 behaviour in cases where some deliveries succeed, thus re-setting the
3603 "first failed" field. An example is a quota failure for a huge message
3604 when small messages continue to be delivered. Without this change, the
3605 "time since failure" will always be short, possible causing more frequent
3606 delivery attempts for the huge message than are intended.
3607 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3609 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3610 $1, $2, $3) because the numerical variables can be reset during some
3611 expansion items (e.g. "match"), thereby losing the authentication data.
3613 PH/21 Make -bV show the size of off_t variables so that the test suite can
3614 decide whether to run tests for quotas > 2G.
3616 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3617 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3618 filecount value is greater than 2G or if a quota value is greater than 2G
3619 on a system where the size of off_t is not greater than 4, a panic error
3622 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3623 never match. The debug and -bh output now contains an explicit error
3624 message indicating a malformed IPv4 address or mask.
3626 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3627 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3628 PH/23 above applies.
3630 PH/25 Do not write to syslog when running in the test harness. The only
3631 occasion when this arises is a failure to open the main or panic logs
3632 (for which there is an explicit test).
3634 PH/26 Added the /no_tell option to "control=freeze".
3636 PH/27 If a host name lookup failed very early in a connection, for example, if
3637 the IP address matched host_lookup and the reverse lookup yielded a name
3638 that did not have a forward lookup, an error message of the form "no IP
3639 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3640 could be logged. Now it outputs the IP address instead of "NULL".
3642 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3643 allows the sender and the authenticated sender to be set when
3644 submitting a message from within Exim. Since child_open_exim() is
3645 documented for local_scan(), the new function should be too.
3647 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3648 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3649 results in an empty string is now treated as unset.
3651 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3653 PH/31 Added sender_verify_fail logging option.
3655 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3656 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3657 tidied the source and removed it altogether.
3659 PH/33 When a queue run was abandoned because the load average was too high, a
3660 log line was always written; now it is written only if the queue_run log
3661 selector is set. In addition, the log line for abandonment now contains
3662 information about the queue run such as the pid. This is always present
3663 in "start" and "stop" lines but was omitted from the "abandon" line.
3665 PH/34 Omit spaces between a header name and the colon in the error message that
3666 is given when verify = headers_syntax fails (if there are lots of them,
3667 the message gets confusing).
3669 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3670 names, as there are now some PTR records that contain slashes. This check
3671 is only to protect against broken name servers that fall over on strange
3672 characters, so the fact that it applies to all lookups doesn't matter.
3674 PH/36 Now that the new test suite is complete, we can remove some of the
3675 special code in Exim that was needed for the old test suite. For example,
3676 sorting DNS records because real resolvers return them in an arbitrary
3677 order. The new test suite's fake resolver always returns records in the
3680 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3681 bounces) except when queue_only is set, to avoid logging races between
3682 the different processes.
3684 PH/38 Panic-die if .include specifies a non-absolute path.
3686 PH/39 A tweak to the "H" retry rule from its user.
3688 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3689 a label. They prevented compilation on older perls.
3691 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3692 a warning to be raised on newish perls.
3694 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3695 on queue. Changes to match documented behaviour of showing count of
3696 messages matching specified criteria.
3698 PH/40 Changed the default ident timeout from 30s to 5s.
3700 PH/41 Added support for the use of login_cap features, on those BSD systems
3701 that have them, for controlling the resources used by pipe deliveries.
3703 PH/42 The content-scanning code uses fopen() to create files in which to put
3704 message data. Previously it was not paying any attention to the mode of
3705 the files. Exim runs with umask(0) because the rest of the code creates
3706 files with open(), and sets the required mode explicitly. Thus, these
3707 files were ending up world-writeable. This was not a big issue, because,
3708 being within the spool directory, they were not world-accessible. I have
3709 created a function called modefopen, which takes an additional mode
3710 argument. It sets umask(777), creates the file, chmods it to the required
3711 mode, then resets the umask. All the relevant calls to fopen() in the
3712 content scanning code have been changed to use this function.
3714 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3715 to 24 hours. This avoids potential overflow problems when processing G
3716 and H retry rules. I suspect nobody ever tinkers with this value.
3718 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3720 PH/45 When the plaintext authenticator is running as a client, the server's
3721 challenges are checked to ensure they are valid base64 strings. By
3722 default, the authentication attempt is cancelled if an invalid string is
3723 received. Setting client_ignore_invalid_base64 true ignores these errors.
3724 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3725 they are received. Thus, the responses can be made to depend on the
3726 challenges. If an invalid string is ignored, an empty string is placed in
3729 PH/46 Messages that are created by the autoreply transport now contains a
3730 References: header, in accordance with RFCs 2822 and 3834.
3732 PH/47 Added authenticated_sender_force to the smtp transport.
3734 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3736 PH/49 Installed latest patch from the Sieve maintainer.
3738 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3739 was also set, the appendfile transport was unnecessarily scanning a
3740 directory of message files (e.g. for maildir delivery) to find the count
3741 of files (along with the size), even though it did not need this
3742 information. It now does the scan only if it needs to find either the
3743 size of the count of files.
3745 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3747 PH/52 Two bugs concerned with error handling when the smtp transport is
3750 (i) Exim was not creating retry information for temporary errors given
3751 for individual recipients after the DATA command when the smtp transport
3752 was used in LMTP mode. This meant that they could be retried too
3753 frequently, and not timed out correctly.
3755 (ii) Exim was setting the flag that allows error details to be returned
3756 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3757 recipients that were returned after the DATA command.
3759 PH/53 This is related to PH/52, but is more general: for any failing address,
3760 when detailed error information was permitted to be returned to the
3761 sender, but the error was temporary, then after the final timeout, only
3762 "retry timeout exceeded" was returned. Now it returns the full error as
3763 well as "retry timeout exceeded".
3765 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3766 do this, and (what is worse) MTAs that accept it.
3768 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3769 will now be deprecated.
3771 PH/56 New os.c-cygwin from the Cygwin maintainer.
3773 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3774 formats (previously only available in exim formats via -bpr, -bpru,
3775 and -bpra. Now also available in native and exiqgrep formats)
3777 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3778 with very large, slow to parse queues
3780 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3782 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3784 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3785 responses to authentication challenges, though it was showing the
3786 challenges; (ii) I've removed the CR characters from the debug output for
3789 PH/58 Allow for the insertion of a newline as well as a space when a string
3790 is turned into more than one encoded-word during RFC 2047 encoding. The
3791 Sieve code now uses this.
3793 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3794 data_4xx, lost_connection, tls_required.
3796 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3797 message was being sent as an SMTP response.
3799 PH/61 Add -l and -k options to exicyclog.
3801 PH/62 When verifying, if an address was redirected to one new address, so that
3802 verification continued, and the new address failed or deferred after
3803 having set something in $address_data, the value of $address_data was not
3804 passed back to the ACL. This was different to the case when no
3805 redirection occurred. The value is now passed back in both cases.
3807 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3808 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3809 use login_cap.h, so on its own it isn't the distinguishing feature. The
3810 new name refers directly to the setclassresources() function.
3812 PH/65 Added configuration files for NetBSD3.
3814 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3816 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3817 is preferred over IPv4.
3819 PH/68 The bounce_return_message and bounce_return_body options were not being
3820 honoured for bounces generated during the reception of non-SMTP messages.
3821 In particular, this applied to messages rejected by the ACL. This bug has
3822 been fixed. However, if bounce_return_message is true and bounce_return_
3823 body is false, the headers that are returned for a non-SMTP message
3824 include only those that have been read before the error was detected.
3825 (In the case of an ACL rejection, they have all been read.)
3827 PH/69 The HTML version of the specification is now built in a directory called
3828 spec_html instead of spec.html, because the latter looks like a path with
3829 a MIME-type, and this confuses some software.
3831 PH/70 Catch two compiler warnings in sieve.c.
3833 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3834 function verify_get_ident() calls ip_connect() to connect a socket, but
3835 if the "connect()" function timed out, ip_connect() used to close the
3836 socket. However, verify_get_ident() also closes the socket later, and in
3837 between Exim writes to the log, which may get opened at this point. When
3838 the socket was closed in ip_connect(), the log could get the same file
3839 descriptor number as the socket. This naturally causes chaos. The fix is
3840 not to close the socket in ip_connect(); the socket should be closed by
3841 the function that creates it. There was only one place in the code where
3842 this was missing, in the iplookup router, which I don't think anybody now
3843 uses, but I've fixed it anyway.
3845 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3846 well as to direct DNS lookups. Otherwise the handling of names in host
3847 lists is inconsistent and therefore confusing.
3853 PH/01 Two changes to the default runtime configuration:
3855 (1) Move the checks for relay_from_hosts and authenticated clients from
3856 after to before the (commented out) DNS black list checks.
3858 (2) Add control=submission to the relay_from_hosts and authenticated
3859 clients checks, on the grounds that messages accepted by these
3860 statements are most likely to be submissions.
3862 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3864 (1) Generate an error if the third argument for the ${prvs expansion is
3867 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3870 (3) Reset the variables that are obtained from the first argument of
3871 ${prvscheck and used in the second argument before leaving the code,
3872 because their memory is reclaimed, so using them afterwards may do
3875 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3876 one (it's much easier than Tom thought :-).
3878 (5) Because of (4), we can now allow for the use of $prvscheck_result
3879 inside the third argument.
3881 PH/03 For some reason, the default setting of PATH when running a command from
3882 a pipe transport was just "/usr/bin". I have changed it to
3885 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3886 anything to be listed in the output from -bV.
3888 PH/05 When a filter generated an autoreply, the entire To: header line was
3889 quoted in the delivery log line, like this:
3891 => >A.N.Other <ano@some.domain> <original@ddress> ...
3893 This has been changed so that it extracts the operative address. There
3894 may be more than one such address. If so, they are comma-separated, like
3897 => >ano@some.domain,ona@other.domain <original@ddress> ...
3899 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3900 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3901 not being looked up in the rDNS to get a host name, Exim was showing the
3902 IP address twice in Received: lines, even though the IP addresses were
3903 identical. For example:
3905 Received: from [1.2.3.4] (helo=[1.2.3.4])
3907 However, if the real host name was known, it was omitting the HELO data
3908 if it matched the actual IP address. This has been tidied up so that it
3909 doesn't show the same IP address twice.
3911 PH/07 When both +timestamp and +memory debugging was on, the value given by
3912 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3913 called by the debug printing, thereby overwriting the timestamp buffer.
3914 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3916 PH/08 When the original message was included in an autoreply transport, it
3917 always said "this is a copy of the message, including all the headers",
3918 even if body_only or headers_only was set. It now gives an appropriate
3921 PH/09 Applied a patch from the Sieve maintainer which:
3923 o fixes some comments
3924 o adds the (disabled) notify extension core
3925 o adds some debug output for the result of if/elsif tests
3926 o points to the current vacation draft in the documentation
3927 and documents the missing references header update
3931 o fixes a bug in processing the envelope test (when testing
3932 multiple envelope elements, the last element determined the
3935 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3936 Electronic Mail") by including:
3938 Auto-submitted: auto-generated
3940 in the messages that it generates (bounce messages and others, such as
3941 warnings). In the case of bounce messages for non-SMTP messages, there was
3942 also a typo: it was using "Auto_submitted" (underscore instead of
3943 hyphen). Since every message generated by Exim is necessarily in response
3944 to another message, thes have all been changed to:
3946 Auto-Submitted: auto-replied
3948 in accordance with these statements in the RFC:
3950 The auto-replied keyword:
3952 - SHOULD be used on messages sent in direct response to another
3953 message by an automatic process,
3955 - MUST NOT be used on manually-generated messages,
3957 - MAY be used on Delivery Status Notifications (DSNs) and Message
3958 Disposition Notifications (MDNs),
3960 - MUST NOT be used on messages generated by automatic or periodic
3961 processes, except for messages which are automatic responses to
3964 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3965 to the default Received: header definition.
3967 PH/12 Added log selector acl_warn_skipped (default on).
3969 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3970 variables because (a) they are in the wrong storage pool and (b) even if
3971 they were copied, it wouldn't work properly because of the caching.
3973 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3974 checking when decoding. Apparently there are clients that generate
3975 overlong encoded strings. Why am I not surprised?
3977 PH/15 If the first argument of "${if match_address" was not empty, but did not
3978 contain an "@" character, Exim crashed. Now it writes a panic log message
3979 and treats the condition as false.
3981 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3983 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3984 extension "envelope-auth". The code is finished and in agreement with
3985 other implementations, but there is no documentation so far and in fact,
3986 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3987 not changing the active code.
3989 Print executed "if" and "elsif" statements when debugging is used. This
3990 helps a great deal to understand what a filter does.
3992 Document more things not specified clearly in RFC3028. I had all this
3993 sorted out, when out of a sudden new issues came to my mind. Oops."
3995 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3998 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3999 canonical form (as documented). However, after a host name lookup from
4000 the IP address, check_host() was doing a simple string comparison with
4001 addresses acquired from the DNS when checking that the found name did
4002 have the original IP as one of its addresses. Since any found IPv6
4003 addresses are likely to be in abbreviated form, the comparison could
4004 fail. Luckily, there already exists a function for doing the comparison
4005 by converting both addresses to binary, so now that is used instead of
4006 the text comparison.
4008 PH/20 There was another similar case to PH/19, when a complete host name was
4009 given in a host list; looking up its IP address could give an abbreviated
4010 form, whereas the current host's name might or might not be abbreviated.
4011 The same fix has been applied.
4017 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4018 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4021 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4022 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4024 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4026 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4027 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4028 Also, for "Auto-Submitted", treat anything other than "no" as
4029 non-personal, in accordance with RFC 3834. (Previously it treated
4030 anything starting "auto-" as non-personal.)
4032 TF/01 The control=submission/name=... option had a problem with syntax
4033 errors if the name included a slash character. The /name= option
4034 now slurps the rest of the string, so it can include any characters
4035 but it must come last in the list of options (after /sender_retain
4038 PH/05 Some modifications to the interface to the fake nameserver for the new
4046 TK/01 Added the "success_on_redirect" address verification option. See
4047 NewStuff for rationale and an example.
4049 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4051 PH/02 Patch to exigrep to allow it to work on syslog lines.
4053 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4054 fread() to skip over the body file's header line, because in Cygwin the
4055 header line is locked and is inaccessible.
4057 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4058 co-exist for some time) to make it clear that it is the Exim ID that is
4059 referenced, not the Message-ID: header line.
4061 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4062 string_format() function, because snprintf() does not exist on all
4065 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4066 ${stat: expansion item.
4068 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4069 protocol synchronization error", to keep the pedants happy.
4071 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4072 well as for IRIX systems, when gcc is being used. See the host.c source
4075 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4077 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4080 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4081 transport and to the smtp transport in LMTP mode.
4083 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4085 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4086 run a filter in a subprocess. This could lead to confusion in subsequent
4087 lookups in the parent process. There should also be a search_tidyup() at
4088 the end of the subprocess.
4090 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4091 only if the host matched helo_try_verify_hosts, which caused the
4092 verification to occur when the EHLO/HELO command was issued. The ACL just
4093 tested the remembered result. Now, if a previous verification attempt has
4094 not happened, "verify = helo" does it there and then.
4096 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4098 TK/03 Fix log output including CR from clamd.
4100 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4101 exist provoked a memory error which could cause a segfault.
4103 PH/15 Installed PCRE 6.2
4105 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4107 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4108 of the problem. Specifically, suggested +O2 rather than +O1 for the
4111 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4113 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4114 record, the port was not correctly logged when the outgoing_port log
4115 selector was set (it logged the transort's default port).
4117 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4118 fallback_hosts, and "hosts" in the smtp transport.
4120 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4121 host errors such as "Connection refused".
4123 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4124 authentication with radiusclient 0.4.9:
4126 - Error returned from rc_read_config was caught wrongly
4127 - Username/password not passed on to radius server due to wrong length.
4129 The presumption is that some radiusclient API changes for 4.51/PH/17
4130 were not taken care of correctly. The code is still untested by me (my
4131 Linux distribution still has 0.3.2 of radiusclient), but it was
4132 contributed by a Radius user.
4134 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4135 expanding the "port" option of the smtp transport.
4137 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4138 while reading a MIME header. Thanks to Tom Hughes for a patch.
4140 PH/24 Include config.h inside local_scan.h so that configuration settings are
4143 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4144 that in an ACL for RCPT (for example), you can examine exactly what was
4147 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4148 commands, but it was not correctly comparing the address with the actual
4149 client host address. Thus, it would show the EHLO address in Received:
4150 header lines when this was not necessary.
4152 PH/27 Added the % operator to ${eval:}.
4154 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4155 it should be ignoring failures (because with -C, for example, it has lost
4156 privilege). It wasn't ignoring creation failures other than "already
4159 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4162 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4163 because an input line was too long, either on its own, or by virtue of
4164 too many continuations, the temporary file was not being removed, and the
4165 return code was incorrect.
4167 PH/31 Missing "BOOL" in function definition in filtertest.c.
4169 PH/32 Applied Sieve patches from the maintainer.
4171 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4173 PH/33 Added "verify = not_blind".
4175 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4176 Local/Makefile (with some defaults set). These are used in built scripts
4177 such as exicyclog, but they have never been used in the exim_install
4178 script (though there are many overriding facilities there). I have
4179 arranged that the exim_install script now takes note of these two
4182 PH/35 Installed configuration files for Dragonfly.
4184 PH/36 When a locally submitted message by a trusted user did not contain a
4185 From: header, and the sender address was obtained from -f or from an SMTP
4186 MAIL command, and the trusted user did not use -F to supply a sender
4187 name, $originator_name was incorrectly used when constructing a From:
4188 header. Furthermore, $originator_name was used for submission mode
4189 messages from external hosts without From: headers in a similar way,
4190 which is clearly wrong.
4192 PH/37 Added control=suppress_local_fixups.
4194 PH/38 When log_selector = +received_sender was set, and the addition of the
4195 sender made the log line's construction buffer exactly full, or one byte
4196 less than full, an overflow happened when the terminating "\n" was
4199 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4200 when the result of a list match is failure because a DNS lookup failed.
4202 PH/40 RM_COMMAND is now used in the building process.
4204 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4205 the "build-* directories that it finds.
4207 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4208 address in a domain literal was a prefix of an interface address.
4210 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4211 when verifying a sender address, unless rewrite_headers is false.
4213 PH/44 Wrote a long comment about why errors_to addresses are verified as
4214 recipients, not senders.
4216 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4217 the ratelimit ACL was added.
4219 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4221 PH/46 Added extra information about PostgreSQL errors to the error string.
4223 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4224 avoiding the need to install special zones in a real server. This is
4225 backwards compatible; if it can't find the fake resolver, it drops back.
4226 Thus, both old and new test suites can be run.
4228 TF/02 Added util/ratelimit.pl
4230 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4231 clock is set back in time.
4233 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4234 Candler <B.Candler@pobox.com>.
4236 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4237 OK for addresses that are the result of redirections.
4239 PH/48 A number of further additions for the benefit of the new test suite,
4240 including a fake gethostbyname() that interfaces to the fake DNS resolver
4243 TF/06 The fix for widen_domains has also been applied to qualify_single and
4244 search_parents which are the other dnslookup options that can cause
4247 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4250 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4252 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4253 service" if it encountered an MX record with an empty target hostname.
4254 The message is now "an MX or SRV record indicated no SMTP service".
4256 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4257 if the DNS of the sending site is misconfigured. This is quite a
4258 common situation. This change restores the behaviour of treating a
4259 helo verification defer as a failure.
4261 PH/51 If self=fail was set on a router, the bounce message did not include the
4262 actual error message.
4268 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4270 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4271 command itself ended in error, the underlying message about the transport
4272 filter timeout was being overwritten with the pipe command error. Now the
4273 underlying error message should be appended to the second error message.
4275 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4277 PH/02 Reduce the amount of output that "make" produces by default. Full output
4278 can still be requested.
4280 PH/03 The warning log line about a condition test deferring for a "warn" verb
4281 was being output only once per connection, rather than after each
4282 occurrence (because it was using the same function as for successful
4283 "warn" verbs). This seems wrong, so I have changed it.
4285 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4286 it should not have, which might have caused a crash in the right
4287 circumstances, but probably never did.
4289 PH/04 Installed a modified version of Tony Finch's patch to make submission
4290 mode fix the return path as well as the Sender: header line, and to
4291 add a /name= option so that you can make the user's friendly name appear
4294 TF/03 Added the control = fakedefer ACL modifier.
4296 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4297 Mark Lowes for thorough testing.
4299 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4301 TK/03 Merged latest SRS patch from Miles Wilton.
4303 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4304 with the definition in sysexits.h (which is #included earlier).
4305 Fortunately, Exim does not actually use EX_OK. The code used to try to
4306 preserve the sysexits.h value, by assuming that macro definitions were
4307 scanned for macro replacements. I have been disabused of this notion,
4308 so now the code just undefines EX_OK before #including unistd.h.
4310 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4311 in the smtp transport. When a block could not be written in a single
4312 write() function, the timeout was being re-applied to each part-write.
4313 This seems wrong - if the receiver was accepting one byte at a time it
4314 would take for ever. The timeout is now adjusted when this happens. It
4315 doesn't have to be particularly precise.
4317 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4318 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4320 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4321 without a domain if the check to <postmaster@domain> fails.
4323 SC/01 Eximstats: added -xls and the ability to specify output files
4324 (patch written by Frank Heydlauf).
4326 SC/02 Eximstats: use FileHandles for outputting results.
4328 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4330 SC/04 Eximstats: fixed display of large numbers with -nvr option
4332 SC/05 Eximstats: fixed merging of reports with empty tables.
4334 SC/06 Eximstats: added the -include_original_destination flag
4336 SC/07 Eximstats: removed tabs and trailing whitespace.
4338 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4340 TK/06 MBOX spool code: Add real "From " MBOX separator line
4341 so the .eml file is really in mbox format (even though
4342 most programs do not really care). Patch from Alex Miller.
4344 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4345 The latter is generated from $received_to and is only set if the
4346 message has one envelope recipient. SA can use these headers,
4347 obviously out-of-the-box. Patch from Alex Miller.
4349 PH/08 The ${def test on a variable was returning false if the variable's
4350 value was "0", contrary to what the specification has always said!
4351 The result should be true unless the variable is empty.
4353 PH/09 The syntax error of a character other than { following "${if
4354 def:variable_name" (after optional whitespace) was not being diagnosed.
4355 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4356 accidental colon was present, for example, could give incorrect results.
4358 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4359 result is used (not including appendfile, where other changes are about
4362 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4363 This involved changing a lot of size variables from int to off_t. It
4364 should work with maildirs and everything.
4366 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4367 spamd dying while we are connected to it.
4369 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4372 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4373 function for BDB 4.3.
4375 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4377 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4378 the sources for PCRE have been re-arranged and more files are now
4381 PH/15 The code I had for printing potentially long long variables in PH/11
4382 above was not the best (it lost precision). The length of off_t variables
4383 is now inspected at build time, and an appropriate printing format (%ld
4384 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4385 to be "long long int" or "long int". This is needed for the internal
4386 formatting function string_vformat().
4388 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4389 the configuration file to be ":syslog", then the script "guesses" where
4390 the logs files are, rather than using the compiled in default. In our
4391 case the guess is not the same as the compiled default, so the script
4392 suddenly stopped working when I started to use syslog. The patch checks
4393 to see if log_file_path is "". If so, it attempts to read it from exim
4394 with no configuration file to get the compiled in version, before it
4395 falls back to the previous guessing code."
4397 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4398 implementing BATV in an Exim configuration. See NewStuff for the gory
4401 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4402 Makefile that are specific to HP-UX.
4404 PH/18 If the "use_postmaster" option was set for a recipient callout together
4405 with the "random" option, the postmaster address was used as the MAIL
4406 FROM address for the random test, but not for the subsequent recipient
4407 test. It is now used for both.
4409 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4410 patch removes a few documentation additions to RFC 3028, because the
4411 latest draft now contains them. It adds the new en;ascii-case comparator
4412 and a new error check for 8bit text in MIME parts. Comparator and
4413 require names are now matched exactly. I enabled the subaddress
4414 extension, but it is not well tested yet (read: it works for me)."
4416 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4417 rework some of the code of TK/09 above to avoid the hardwired use of
4418 "%lld" and "long long". Replaced the call to snprintf() with a call to
4421 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4422 records point to non-existent hosts", "retry timeout exceeded", and
4423 "retry time not reached for any host after a long failure period".
4425 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4426 experimental DomainKeys support:
4428 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4429 (2) On an error such as an illegally used "control", the wrong name for
4430 the control was given.
4432 These problems did NOT occur unless DomainKeys support was compiled.
4434 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4436 PH/24 Added ${if match_ip condition.
4438 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4439 databases so that it will be absolutely obvious if a crash occurs in the
4440 DB library. This is a regular occurrence (often caused by mis-matched
4443 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4444 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4445 picked up on a user's system that detects such things. There doesn't seem
4446 to be a gcc warning option for this - only an attribute that has to be
4447 put on the function's prototype. It seems that in Fedora Core 4 they have
4448 set this on a number of new functions. No doubt there will be more in due
4451 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4452 specify a transport. However, if an address that was verified by such a
4453 router was the subject of a callout, Exim crashed because it tried to
4454 read the rcpt_include_affixes from the non-existent transport. Now it
4455 just assumes that the setting of that option is false. This bug was
4456 introduced by 4.51/PH/31.
4458 PH/28 Changed -d+all to exclude +memory, because that information is very
4459 rarely of interest, but it makes the output a lot bigger. People tend to
4460 do -d+all out of habit.
4462 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4463 code in os-type was giving problems when libc.so lives in lib64, like on
4466 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4467 aren't the modern standard, and it seems that some systems' include files
4468 don't always have them. Exim was already checking for some of the newer
4469 ones like T_AAAA, and defining it itself. I've added checks for all the
4470 record types that Exim uses.
4472 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4473 not automatically generating a new one, as it is supposed to. This
4474 prevented TLS from working. If the file did exist, but contained invalid
4475 data, a new version was generated, as expected. It was only the case of a
4476 non-existent file that was broken.
4478 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4479 with a change in libdomainkeys > 0.64.
4481 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4482 from DNS. If the selector record carries the flag, it now has
4483 precedence over the domain-wide flag.
4485 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4487 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4488 the use of a port name that isn't defined in /etc/services) occurred, the
4489 message was deferred as in a normal delivery, and thus remained on the
4490 spool, instead of being failed because of the mua_wrapper setting. This
4491 is now fixed, and I tidied up some of the mua_wrapper messages at the
4494 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4495 the messages in a hash of arrays rather than using individual hashes.
4496 This is a bit cleaner and results in dramatic memory savings, albeit
4497 at a slight CPU cost.
4499 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4500 as requested by Marc Sherman.
4502 SC/10 Eximstats: added histograms for user specified patterns as requested
4505 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4507 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4508 fopen() in the content-scanning modules that did not already have it.
4514 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4515 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4517 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4519 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4521 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4522 to test Sieve filters that use "vacation".
4524 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4525 that changes the way the GnuTLS parameters are stored in the cache file.
4526 The new format can be generated externally. For backward compatibility,
4527 if the data in the cache doesn't make sense, Exim assumes it has read an
4528 old-format file, and it generates new data and writes a new file. This
4529 means that you can't go back to an older release without removing the
4532 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4533 work if there are any delivery delays because "one_time" forces the
4534 parent to be marked "delivered", so its unseen clone is never tried
4535 again. For this reason, Exim now forbids the simultaneous setting of
4538 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4539 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4540 entry if you want to know the details. The fix, however, neglected to
4541 consider the case when local delivery batching is involved. The test for
4542 "previously delivered" was not happening when checking to see if an
4543 address could be batched with a previous (undelivered) one; under
4544 certain circumstances this could lead to multiple deliveries to the same
4547 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4548 in its include files, and this causes problems building Exim.
4550 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4551 header_syntax) but Exim was just ignoring anything given after a slash.
4552 In particular, this caused confusion with an attempt to use "verify =
4553 reverse_host_lookup/defer_ok". An error is now given when options are
4554 supplied for verify items that do not have them. (Maybe reverse_host_
4555 lookup should have a defer_ok option, but that's a different point.)
4557 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4558 defined by RFC 821) to 2048, because there were problems with some AUTH
4559 commands, and RFC 1869 says the size should be increased for extended
4560 SMTP commands that take arguments.
4562 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4565 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4566 "unknown" error; now it says that the functionality isn't in the binary.
4568 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4569 an address' error message when a string expansion fails (syntax or
4570 whatever). Otherwise the password may appear in the log. Following change
4571 PH/42 below, there is no longer a chance of it appearing in a bounce
4574 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4576 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4577 of its addresses was ever tried. (Bugzilla bug #2.)
4579 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4580 the result incorrectly in the debug output. (It correctly added a newline
4581 to what was transported.)
4583 TF/01 Added $received_time.
4585 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4586 commented out examples of how to interface to a virus scanner and to
4587 SpamAssassin. Also added commented examples of av_scanner and
4588 spamd_address settings.
4590 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4591 and controls are allowed in which ACLs. There were a couple of minor
4592 errors. Some of the entries in the conditions table (which is a table of
4593 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4594 negation of where the condition IS allowed.
4596 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4598 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4599 header file does not have a version number, so I've had to invent a new
4600 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4601 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4602 radiusclient), but it was contributed by a Radius user.
4604 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4605 files or directories, for OpenSSL.
4607 PH/19 When an Exim process that is running as root has to create an Exim log
4608 file, it does so in a subprocess that runs as exim:exim so as to get the
4609 ownership right at creation (otherwise, other Exim processes might see
4610 the file with the wrong ownership). There was no test for failure of this
4611 fork() call, which would lead to the process getting stuck as it waited
4612 for a non-existent subprocess. Forks do occasionally fail when resources
4613 run out. I reviewed all the other calls to fork(); they all seem to check
4616 PH/20 When checking for unexpected SMTP input at connect time (before writing
4617 the banner), Exim was not dealing correctly with a non-positive return
4618 from the read() function. If the client had disconnected by this time,
4619 the result was a log entry for a synchronization error with an empty
4620 string after "input=" when read() returned zero. If read() returned -1
4621 (an event I could not check), uninitialized data bytes were printed.
4622 There were reports of junk text (parts of files, etc) appearing after
4625 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4627 PH/22 Added support for macro redefinition, and (re)definition in between
4628 driver and ACL definitions.
4630 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4631 forgetting to use the resulting value; it was using the unexpanded value.
4633 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4634 hadn't been configured. The fix is from Juergen Kreileder, who
4635 understands it better than I do:
4637 "Here's what I see happening with three configured cyrus_sasl
4638 authenticators configured (plain, login, cram-md5):
4640 On startup auth_cyrus_sasl_init() gets called for each of these.
4641 This means three calls to sasl_listmech() without a specified mech_list.
4642 => SASL tests which mechs of all available mechs actually work
4643 => three warnings about OTP not working
4644 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4646 With the patch, sasl_listmech() also gets called three times. But now
4647 SASL's mech_list option is set to the server_mech specified in the the
4648 authenticator. Or in other words, the answer from sasl_listmech()
4649 gets limited to just the mech you're testing for (which is different
4651 => the return list contains just 'plain' or 'login', 'cram-md5' or
4652 nothing depending on the value of ob->server_mech.
4654 I've just tested the patch: Authentication still works fine,
4655 unavailable mechs specified in the exim configuration are still
4656 caught, and the auth.log warnings about OTP are gone."
4658 PH/25 When debugging is enabled, the contents of the command line are added
4659 to the debugging output, even when log_selector=+arguments is not
4662 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4663 answer is "GNU", and only if the return is "GNU/something" is the answer
4666 PH/27 $acl_verify_message is now set immediately after the failure of a
4667 verification in an ACL, and so is available in subsequent modifiers. In
4668 particular, the message can be preserved by coding like this:
4670 warn !verify = sender
4671 set acl_m0 = $acl_verify_message
4673 Previously, $acl_verify_message was set only while expanding "message"
4674 and "log_message" when a very denied access.
4676 PH/28 Modified OS/os.c-Linux with
4678 -#ifndef OS_LOAD_AVERAGE
4679 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4681 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4682 nomenclature these days.)
4684 PH/29 Installed patch from the Sieve maintainer that adds the options
4685 sieve_useraddress and sieve_subaddress to the redirect router.
4687 PH/30 In these circumstances:
4688 . Two addresses routed to the same list of hosts;
4689 . First host does not offer TLS;
4690 . First host accepts first address;
4691 . First host gives temporary error to second address;
4692 . Second host offers TLS and a TLS session is established;
4693 . Second host accepts second address.
4694 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4695 and peerdn, if requested) that were in fact used only for the second
4698 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4699 attention to any local part prefix or suffix that was matched by the
4700 router that accepted the address. It now behaves in the same way as it
4701 does for delivery: the affixes are removed from the local part unless
4702 rcpt_include_affixes is set on the transport.
4704 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4705 timeout during the DATA phase of an incoming message.
4707 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4708 applied a patch sanctioned by the Sieve maintainer.
4710 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4711 the uid or gid is negative. A case of a negative gid caused this to be
4712 noticed. The fix allows for either to be negative.
4714 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4715 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4718 PH/36 The change PH/12 above was broken. Fixed it.
4720 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4721 the grounds that routing the same address twice would always produce the
4722 same answer. This might have been true once, but it is certainly no
4723 longer true now. Routing a child address may depend on the previous
4724 routing that produced that child. Some complicated redirection strategies
4725 went wrong when messages had multiple recipients, and made Exim's
4726 behaviour dependent on the order in which the addresses were given.
4728 I have moved the duplicate checking until after the routing is complete.
4729 Exim scans the addresses that are assigned to local and remote
4730 transports, and removes any duplicates. This means that more work will be
4731 done, as duplicates will always all be routed, but duplicates are
4732 presumably rare, so I don't expect this is of any significance.
4734 For deliveries to pipes, files, and autoreplies, the duplicate checking
4735 still happens during the routing process, since they are not going to be
4738 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4739 It corrects a timeout issue with spamd. This is Ian's comment: "The
4740 background is that sometimes spamd either never reads data from a
4741 connection it has accepted, or it never writes response data. The exiscan
4742 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4743 blindly assumes that writes won't block so it may never time out."
4745 PH/39 Allow G after quota size as well as K and M.
4747 PH/40 The value set for $authenticated_id in an authenticator may not contain
4748 binary zeroes or newlines because the value is written to log lines and
4749 to spool files. There was no check on this. Now the value is run through
4750 the string_printing() function so that such characters are converted to
4751 printable escape sequences.
4753 PH/41 $message_linecount is a new variable that contains the total number of
4754 lines in the message. Compare $body_linecount, which is the count for the
4757 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4758 bounce and delay warning messages, except in certain special cases, which
4761 (a) An SMTP error message from a remote host;
4762 (b) A message specified in a :fail: redirection;
4763 (c) A message specified in a "fail" command in a system filter;
4764 (d) A message specified in a FAIL return from the queryprogram router;
4765 (e) A message specified by the cannot_route_message router option.
4767 In these cases only, Exim does include the error details in bounce and
4768 warning messages. There are also a few cases where bland messages such
4769 as "unrouteable address" or "local delivery error" are given.
4771 PH/43 $value is now also set for the "else" part of a ${run expansion.
4773 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4774 being worked on, but at least Exim now implements the latest version to
4777 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4778 process to complete was treated as a delivery failure, a timeout while
4779 writing the message to the pipe was logged, but erroneously treated as a
4780 successful delivery. Such timeouts include transport filter timeouts. For
4781 consistency with the overall process timeout, these timeouts are now
4782 treated as errors, giving rise to delivery failures by default. However,
4783 there is now a new Boolean option for the pipe transport called
4784 timeout_defer, which, if set TRUE, converts the failures into defers for
4785 both kinds of timeout. A transport filter timeout is now identified in
4788 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4789 systems where "make" and "gmake" are different, calling "gmake" at top
4790 level broke things. I've arranged for the value of $(MAKE) to be passed
4791 from the Makefile to this script so that it can call the same version of
4795 A note about Exim versions 4.44 and 4.50
4796 ----------------------------------------
4798 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4799 changes of various kinds. As a consequence, a big documentation update was
4800 needed. This delayed the release for rather longer than seemed good, especially
4801 in the light of a couple of (minor) security issues. Therefore, the changes
4802 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4803 release. So 4.44 and 4.50 are in effect two different branches that both start
4806 I have left the 4.50 change log unchanged; it contains all the changes since
4807 4.43. The change log for 4.44 is below; many of its items are identical to
4808 those for 4.50. This seems to be the most sensible way to preserve the
4809 historical information.
4815 1. Minor wording change to the doc/README.SIEVE file.
4817 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4818 computation of the current number of files was incorrect.
4820 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4821 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4824 4. Give more explanation in the error message when the command for a transport
4825 filter fails to execute.
4827 5. There are several places where Exim runs a non-Exim command in a
4828 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4829 was being done only for the command run by the queryprogram router. It is
4830 now done for all such subprocesses. The other cases are: ${run, transport
4831 filters, and the commands run by the lmtp and pipe transports.
4833 6. Added CONFIGURE_GROUP build-time option.
4835 7. Some older OS have a limit of 256 on the maximum number of file
4836 descriptors. Exim was using setrlimit() to set 1000 as a large value
4837 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4838 systems. I've change it so that if it can't get 1000, it tries for 256.
4840 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4841 was an oversight, and furthermore, ever since the addition of extra
4842 controls (e.g. 4.43/32), the checks on when to allow different forms of
4843 "control" were broken. There should now be diagnostics for all cases when a
4844 control that does not make sense is encountered.
4846 9. Added the /retain_sender option to "control=submission".
4848 10. $recipients is now available in the predata ACL (oversight).
4850 11. Tidy the search cache before the fork to do a delivery from a message
4851 received from the command line. Otherwise the child will trigger a lookup
4852 failure and thereby defer the delivery if it tries to use (for example) a
4853 cached ldap connection that the parent has called unbind on.
4855 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4856 of $address_data from the recipient verification was clobbered by the
4857 sender verification.
4859 13. The value of address_data from a sender verification is now available in
4860 $sender_address_data in subsequent conditions in the ACL statement.
4862 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4864 15. Added a new option "connect=<time>" to callout options, to set a different
4867 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4868 was its contents. (It was OK if the option was not defined at all.)
4870 17. A "Completed" log line is now written for messages that are removed from
4871 the spool by the -Mrm option.
4873 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4874 information about exactly what failed.
4876 19. Added -dd to debug only the daemon process.
4878 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4879 handles timeouts, both on the server side and network timeouts. Renamed the
4880 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4882 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4883 It is now set to "smtps".
4885 22. $host_address is now set to the target address during the checking of
4886 ignore_target_hosts.
4888 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4889 being passed; this would have caused $sender_host_name to have been used if
4890 matching the list had actually called for a host name (not very likely,
4891 since this list is usually IP addresses). A host name is now passed as
4894 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4895 code that specifies a non-restarting handler (typically sigaction() in
4896 modern systems) in an attempt to fix a rare and obscure crash bug.
4898 25. Narrowed the window for a race in the daemon that could cause it to ignore
4899 SIGCHLD signals. This is not a major problem, because they are used only to
4900 wake it up if nothing else does.
4902 26. A malformed maildirsize file could cause Exim to calculate negative values
4903 for the mailbox size or file count. Odd effects could occur as a result.
4904 The maildirsize information is now recalculated if the size or filecount
4907 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4908 support for a long time. Removed HAVE_SYS_VFS_H.
4910 28. Installed the latest version of exipick from John Jetmore.
4912 29. In an address list, if the pattern was not a regular expression, an empty
4913 subject address (from a bounce message) matched only if the pattern was an
4914 empty string. Non-empty patterns were not even tested. This was the wrong
4915 because it is perfectly reasonable to use an empty address as part of a
4916 database query. An empty address is now tested by patterns that are
4917 lookups. However, all the other forms of pattern expect the subject to
4918 contain a local part and a domain, and therefore, for them, an empty
4919 address still always fails if the pattern is not itself empty.
4921 30. Exim went into a mad DNS loop when attempting to do a callout where the
4922 host was specified on an smtp transport, and looking it up yielded more
4923 than one IP address.
4925 31. Re-factored the code for checking spool and log partition space into a
4926 function that finds that data and another that does the check. The former
4927 is then used to implement four new variables: $spool_space, $log_space,
4928 $spool_inodes, and $log_inodes.
4930 32. The RFC2047 encoding function was originally intended for short strings
4931 such as real names; it was not keeping to the 75-character limit for
4932 encoded words that the RFC imposes. It now respects the limit, and
4933 generates multiple encoded words if necessary. To be on the safe side, I
4934 have increased the buffer size for the ${rfc2047: expansion operator from
4937 33. It is now permitted to omit both strings after an "if" condition; if the
4938 condition is true, the result is "true". As before, when the second string
4939 is omitted, a false condition yields an empty string. This makes it less
4940 cumbersome to write custom ACL and router conditions.
4942 34. Failure to deliver a bounce message always caused it to be frozen, even if
4943 there was an errors_to setting on the router. The errors_to setting is now
4946 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4947 canonical form (fully expanded) before being placed in
4948 $sender_host_address.
4950 36. The table in the code that translates DNS record types into text (T_A to
4951 "A" for instance) was missing entries for NS and CNAME. It is just possible
4952 that this could have caused confusion if both these types were looked up
4953 for the same domain, because the text type is used as part of Exim's
4954 per-process caching. But the chance of anyone hitting this buglet seems
4957 37. The dnsdb lookup has been extended in a number of ways.
4959 (1) There is a new type, "zns", which walks up the domain tree until it
4960 finds some nameserver records. It should be used with care.
4962 (2) There is a new type, "mxh", which is like "mx" except that it returns
4963 just the host names, not the priorities.
4965 (3) It is now possible to give a list of domains (or IP addresses) to be
4966 looked up. The behaviour when one of the lookups defers can be
4967 controlled by a keyword.
4969 (4) It is now possible to specify the separator character for use when
4970 multiple records are returned.
4972 38. The dnslists ACL condition has been extended: it is now possible to supply
4973 a list of IP addresses and/or domains to be looked up in a particular DNS
4976 39. Added log_selector=+queue_time_overall.
4978 40. When running the queue in the test harness, wait just a tad after forking a
4979 delivery process, to get repeatability of debugging output.
4981 41. Include certificate and key file names in error message when GnuTLS fails
4982 to set them up, because the GnuTLS error message doesn't include the name
4983 of the failing file when there is a problem reading it.
4985 42. Allow both -bf and -bF in the same test run.
4987 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4989 44. The "Exiscan patch" is now merged into the mainline Exim source.
4991 45. Sometimes the final signoff response after QUIT could fail to get
4992 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4993 < 0 before doing a fflush(). This bug looks as though it goes back to the
4994 introduction of TLS in release 3.20, but "sometimes" must have been rare
4995 because the tests only now provoked it.
4997 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4998 (this can affect the format of dates).
5000 47. exim_tidydb, when checking for the continued existence of a message for
5001 which it has found a message-specific retry record, was not finding
5002 messages that were in split spool directories. Consequently, it was
5003 deleting retry records that should have stayed in existence.
5005 48. Steve fixed some bugs in eximstats.
5007 49. The SPA authentication driver was not abandoning authentication and moving
5008 on to the next authenticator when an expansion was forced to fail,
5009 contradicting the general specification for all authenticators. Instead it
5010 was generating a temporary error. It now behaves as specified.
5012 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5013 (the order specifies the preference for clients). The order is now AES256,
5014 AES128, 3DES, ARCFOUR128.
5016 51. Small patch to Sieve code - explicitly set From: when generating an
5019 52. Exim crashed if a remote delivery caused a very long error message to be
5020 recorded - for instance if somebody sent an entire SpamAssassin report back
5021 as a large number of 550 error lines. This bug was coincidentally fixed by
5022 increasing the size of one of Exim's internal buffers (big_buffer) that
5023 happened as part of the Exiscan merge. However, to be on the safe side, I
5024 have made the code more robust (and fixed the comments that describe what
5027 53. Now that there can be additional text after "Completed" in log lines (if
5028 the queue_time_overall log selector is set), a one-byte patch to exigrep
5029 was needed to allow it to recognize "Completed" as not the last thing in
5032 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5033 patch that reportedly fixes this has been added. I am not expert enough to
5034 create a test for it. This is what the patch creator wrote:
5036 "I found a little strange behaviour of ldap code when working with
5037 Windows 2003 AD Domain, where users was placed in more than one
5038 Organization Units. When I tried to give exim partial DN, the exit code
5039 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5040 But simultaneously result of request was absolutely normal ldap result,
5041 so I produce this patch..."
5043 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5044 REFERENCE, so I have modified the code to exclude the patch when that macro
5047 55. Some experimental protocols are using DNS PTR records for new purposes. The
5048 keys for these records are domain names, not reversed IP addresses. The
5049 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5050 leaves it alone. Component reversal etc. now happens only for IP addresses.
5053 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5055 57. Double the size of the debug message buffer (to 2048) so that more of very
5056 long debug lines gets shown.
5058 58. The exicyclog utility now does better if the number of log files to keep
5059 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5061 59. Two changes related to the smtp_active_hostname option:
5063 (1) $smtp_active_hostname is now available as a variable.
5064 (2) The default for smtp_banner uses $smtp_active_hostname instead
5065 of $primary_hostname.
5067 60. The host_aton() function is supposed to be passed a string that is known
5068 to be a valid IP address. However, in the case of IPv6 addresses, it was
5069 not checking this. This is a hostage to fortune. Exim now panics and dies
5070 if the condition is not met. A case was found where this could be provoked
5071 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5072 components; fortuitously, this particular loophole had already been fixed
5073 by change 4.50/55 above.
5075 If there are any other similar loopholes, the new check in host_aton()
5076 itself should stop them being exploited. The report I received stated that
5077 data on the command line could provoke the exploit when Exim was running as
5078 exim, but did not say which command line option was involved. All I could
5079 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5080 running as the user.
5083 61. There was a buffer overflow vulnerability in the SPA authentication code
5084 (which came originally from the Samba project). I have added a test to the
5085 spa_base64_to_bits() function which I hope fixes it.
5088 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5089 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5091 63. The daemon start-up calls getloadavg() while still root for those OS that
5092 need the first call to be done as root, but it missed one case: when
5093 deliver_queue_load_max is set with deliver_drop_privilege. This is
5094 necessary for the benefit of the queue runner, because there is no re-exec
5095 when deliver_drop_privilege is set.
5097 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5098 This has been fixed.
5100 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5101 was in use, was not putting the data itself into the right store pool;
5102 consequently, it could be overwritten for a subsequent message in the same
5103 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5106 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5108 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5109 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5110 the function were treating the return as a boolean value, which happened to
5111 work because 0=false and not-0=true, but is not correct code.
5113 68. The host_aton() function was not handling scoped IPv6 addresses (those
5114 with, for example, "%eth0" on the end) correctly.
5116 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5117 negated items (that is, ~something) in unsigned ints. Some compilers
5118 apparently mutter when there is no cast.
5120 70. If an address verification called from an ACL failed, and did not produce a
5121 user-specific message (i.e. there was only a "system" message), nothing was
5122 put in $acl_verify_message. In this situation, it now puts the system
5125 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5126 session; change 4.31/43 added the unwanted input to the log line - except
5127 that it did not do this in the start of session case. It now does.
5129 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5130 This is wrong and can cause the other end to generate a synchronization
5131 error if it is another Exim or anything else that does the synchronization
5132 check. A QUIT command is no longer sent after a timeout.
5134 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5135 during host lookups.
5137 74. The defer_ok option of callout verification was not working if it was used
5138 when verifying addresses in header lines, that is, for this case:
5140 verify = header_sender/callout=defer_ok
5142 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5143 those file descriptors could be used for SMTP connections. If anything
5144 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5145 could be sent to the SMTP client, causing chaos. The daemon now opens
5146 stdin, stdout, and stderr to /dev/null when it puts itself into the
5149 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5150 log by default. The user can override this with suitable Perl magic.
5152 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5153 the log message when discard triggers, was not working for the DATA ACL or
5154 for the non-SMTP ACL.
5156 78. Error message wording change in sieve.c.
5158 79. If smtp_accept_max_per_host was set, the number of connections could be
5159 restricted to fewer than expected, because the daemon was trying to set up
5160 a new connection before checking whether the processes handling previous
5161 connections had finished. The check for completed processes is now done
5162 earlier. On busy systems, this bug wouldn't be noticed because something
5163 else would have woken the daemon, and it would have reaped the completed
5166 80. If a message was submitted locally by a user whose login name contained one
5167 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5168 It caused a spool format error. I have fixed the spool reading code. A
5169 related problem was that the "from" clause in the Received: line became
5170 illegal because of the space(s). It is now covered by ${quote_local_part.
5172 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5175 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5177 83. Patch from Sieve maintainer to fix unterminated string problem in
5178 "vacation" handling.
5180 84. Some minor changes to the Linux configuration files to help with other
5181 OS variants using glibc.
5183 85. One more patch for Sieve to update vacation handling to latest spec.
5186 ----------------------------------------------------
5187 See the note above about the 4.44 and 4.50 releases.
5188 ----------------------------------------------------
5194 1. Change 4.43/35 introduced a bug that caused file counts to be
5195 incorrectly computed when quota_filecount was set in an appendfile
5198 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5199 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5202 3. Give more explanation in the error message when the command for a transport
5203 filter fails to execute.
5205 4. There are several places where Exim runs a non-Exim command in a
5206 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5207 was being done only for the command run by the queryprogram router. It is
5208 now done for all such subprocesses. The other cases are: ${run, transport
5209 filters, and the commands run by the lmtp and pipe transports.
5211 5. Some older OS have a limit of 256 on the maximum number of file
5212 descriptors. Exim was using setrlimit() to set 1000 as a large value
5213 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5214 systems. I've change it so that if it can't get 1000, it tries for 256.
5216 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5217 was an oversight, and furthermore, ever since the addition of extra
5218 controls (e.g. 4.43/32), the checks on when to allow different forms of
5219 "control" were broken. There should now be diagnostics for all cases when a
5220 control that does not make sense is encountered.
5222 7. $recipients is now available in the predata ACL (oversight).
5224 8. Tidy the search cache before the fork to do a delivery from a message
5225 received from the command line. Otherwise the child will trigger a lookup
5226 failure and thereby defer the delivery if it tries to use (for example) a
5227 cached ldap connection that the parent has called unbind on.
5229 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5230 of $address_data from the recipient verification was clobbered by the
5231 sender verification.
5233 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5234 was its contents. (It was OK if the option was not defined at all.)
5236 11. A "Completed" log line is now written for messages that are removed from
5237 the spool by the -Mrm option.
5239 12. $host_address is now set to the target address during the checking of
5240 ignore_target_hosts.
5242 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5243 being passed; this would have caused $sender_host_name to have been used if
5244 matching the list had actually called for a host name (not very likely,
5245 since this list is usually IP addresses). A host name is now passed as
5248 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5249 code that specifies a non-restarting handler (typically sigaction() in
5250 modern systems) in an attempt to fix a rare and obscure crash bug.
5252 15. Narrowed the window for a race in the daemon that could cause it to ignore
5253 SIGCHLD signals. This is not a major problem, because they are used only to
5254 wake it up if nothing else does.
5256 16. A malformed maildirsize file could cause Exim to calculate negative values
5257 for the mailbox size or file count. Odd effects could occur as a result.
5258 The maildirsize information is now recalculated if the size or filecount
5261 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5262 support for a long time. Removed HAVE_SYS_VFS_H.
5264 18. Updated exipick to current release from John Jetmore.
5266 19. Allow an empty sender to be matched against a lookup in an address list.
5267 Previously the only cases considered were a regular expression, or an
5270 20. Exim went into a mad DNS lookup loop when doing a callout where the
5271 host was specified on the transport, if the DNS lookup yielded more than
5274 21. The RFC2047 encoding function was originally intended for short strings
5275 such as real names; it was not keeping to the 75-character limit for
5276 encoded words that the RFC imposes. It now respects the limit, and
5277 generates multiple encoded words if necessary. To be on the safe side, I
5278 have increased the buffer size for the ${rfc2047: expansion operator from
5281 22. Failure to deliver a bounce message always caused it to be frozen, even if
5282 there was an errors_to setting on the router. The errors_to setting is now
5285 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5286 canonical form (fully expanded) before being placed in
5287 $sender_host_address.
5289 24. Updated eximstats to version 1.33
5291 25. Include certificate and key file names in error message when GnuTLS fails
5292 to set them up, because the GnuTLS error message doesn't include the name
5293 of the failing file when there is a problem reading it.
5295 26. Expand error message when OpenSSL has problems setting up cert/key files.
5298 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5299 (this can affect the format of dates).
5301 28. exim_tidydb, when checking for the continued existence of a message for
5302 which it has found a message-specific retry record, was not finding
5303 messages that were in split spool directories. Consequently, it was
5304 deleting retry records that should have stayed in existence.
5306 29. eximstats updated to version 1.35
5307 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5308 1.35 - bugfix such that pie charts by volume are generated correctly
5310 30. The SPA authentication driver was not abandoning authentication and moving
5311 on to the next authenticator when an expansion was forced to fail,
5312 contradicting the general specification for all authenticators. Instead it
5313 was generating a temporary error. It now behaves as specified.
5315 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5316 (the order specifies the preference for clients). The order is now AES256,
5317 AES128, 3DES, ARCFOUR128.
5319 31. Small patch to Sieve code - explicitly set From: when generating an
5322 32. Exim crashed if a remote delivery caused a very long error message to be
5323 recorded - for instance if somebody sent an entire SpamAssassin report back
5324 as a large number of 550 error lines. This bug was coincidentally fixed by
5325 increasing the size of one of Exim's internal buffers (big_buffer) that
5326 happened as part of the Exiscan merge. However, to be on the safe side, I
5327 have made the code more robust (and fixed the comments that describe what
5330 33. Some experimental protocols are using DNS PTR records for new purposes. The
5331 keys for these records are domain names, not reversed IP addresses. The
5332 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5333 leaves it alone. Component reversal etc. now happens only for IP addresses.
5336 34. The host_aton() function is supposed to be passed a string that is known
5337 to be a valid IP address. However, in the case of IPv6 addresses, it was
5338 not checking this. This is a hostage to fortune. Exim now panics and dies
5339 if the condition is not met. A case was found where this could be provoked
5340 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5341 components; fortuitously, this particular loophole had already been fixed
5342 by change 4.50/55 or 4.44/33 above.
5344 If there are any other similar loopholes, the new check in host_aton()
5345 itself should stop them being exploited. The report I received stated that
5346 data on the command line could provoke the exploit when Exim was running as
5347 exim, but did not say which command line option was involved. All I could
5348 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5349 running as the user.
5352 35. There was a buffer overflow vulnerability in the SPA authentication code
5353 (which came originally from the Samba project). I have added a test to the
5354 spa_base64_to_bits() function which I hope fixes it.
5357 36. The daemon start-up calls getloadavg() while still root for those OS that
5358 need the first call to be done as root, but it missed one case: when
5359 deliver_queue_load_max is set with deliver_drop_privilege. This is
5360 necessary for the benefit of the queue runner, because there is no re-exec
5361 when deliver_drop_privilege is set.
5363 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5364 was in use, was not putting the data itself into the right store pool;
5365 consequently, it could be overwritten for a subsequent message in the same
5366 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5369 38. Sometimes the final signoff response after QUIT could fail to get
5370 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5371 < 0 before doing a fflush(). This bug looks as though it goes back to the
5372 introduction of TLS in release 3.20, but "sometimes" must have been rare
5373 because the tests only now provoked it.
5379 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5380 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5381 Now it returns an integer. A number of calls were still expecting a T/F
5382 return. Fortuitously, in all cases, the tests worked in OK situations,
5383 which is the norm. However, things would have gone wrong on any write
5384 failures on the smtp file descriptor. This function is used when sending
5385 messages over SMTP and also when doing verify callouts.
5387 2. When Exim is called to do synchronous delivery of a locally submitted
5388 message (the -odf or -odi options), it no longer closes stderr before doing
5391 3. Implemented the mua_wrapper option.
5393 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5395 5. Implemented the functions header_remove(), header_testname(),
5396 header_add_at_position(), and receive_remove_recipient(), and exported them
5399 6. If an ACL "warn" statement specified the addition of headers, Exim already
5400 inserted X-ACL-Warn: at the start if there was no header name. However, it
5401 was not making this test for the second and subsequent header lines if
5402 there were newlines in the string. This meant that an invalid header could
5403 be inserted if Exim was badly configured.
5405 7. Allow an ACL "warn" statement to add header lines at the start or after all
5406 the Received: headers, as well as at the end.
5408 8. Added the rcpt_4xx retry error code.
5410 9. Added postmaster_mailfrom=xxx to callout verification option.
5412 10. Added mailfrom=xxxx to the callout verification option, for verify=
5415 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5416 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5418 12. Inserted some casts to stop certain compilers warning when using pointer
5419 differences as field lengths or precisions in printf-type calls (mostly
5420 affecting debugging statements).
5422 13. Added optional readline() support for -be (dynamically loaded).
5424 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5425 same clock tick as a message's arrival, so that its received time was the
5426 same as the "first fail" time on the retry record, and that message
5427 remained on the queue past the ultimate address timeout, every queue runner
5428 would try a delivery (because it was past the ultimate address timeout) but
5429 after another failure, the ultimate address timeout, which should have then
5430 bounced the address, did not kick in. This was a "< instead of <=" error;
5431 in most cases the first failure would have been in the next clock tick
5432 after the received time, and all would be well.
5434 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5435 being recognized when the domain list was tested by the match_domain
5436 condition in an expansion string.
5438 16. Added the ${str2b64: operator.
5440 17. Exim was always calling setrlimit() to set a large limit for the number of
5441 processes, without checking whether the existing limit was already
5442 adequate. (It did check for the limit on file descriptors.) Furthermore,
5443 errors from getrlimit() and setrlimit() were being ignored. Now they are
5444 logged to the main and panic logs, but Exim does carry on, to try to do its
5445 job under whatever limits there are.
5447 18. Imported PCRE 5.0.
5449 19. Trivial typo in log message " temporarily refused connection" (the leading
5452 20. If the log selector return_path_on_delivery was set and an address was
5453 redirected to /dev/null, the delivery process crashed because it assumed
5454 that a return path would always be set for a "successful" delivery. In this
5455 case, the whole delivery is bypassed as an optimization, and therefore no
5458 21. Internal re-arrangement: the function for sending a challenge and reading
5459 a response while authentication was assuming a zero-terminated challenge
5460 string. It's now changed to take a pointer and a length, to allow for
5461 binary data in such strings.
5463 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5465 23. Exim was not respecting finduser_retries when seeking the login of the
5466 uid under which it was called; it was always trying 10 times. (The default
5467 setting of finduser_retries is zero.) Also, it was sleeping after the final
5468 failure, which is pointless.
5470 24. Implemented tls_on_connect_ports.
5472 25. Implemented acl_smtp_predata.
5474 26. If the domain in control=submission is set empty, Exim assumes that the
5475 authenticated id is a complete email address when it generates From: or
5476 Sender: header lines.
5478 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5479 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5480 chown and chgrp in /bin and hostname in /usr/bin.
5482 28. Exim was keeping the "process log" file open after each use, just as it
5483 does for the main log. This opens the possibility of it remaining open for
5484 long periods when the USR1 signal hits a daemon. Occasional processlog
5485 errors were reported, that could have been caused by this. Anyway, it seems
5486 much more sensible not to leave this file open at all, so that is what now
5489 29. The long-running daemon process does not normally write to the log once it
5490 has entered its main loop, and it closes the log before doing so. This is
5491 so that log files can straightforwardly be renamed and moved. However,
5492 there are a couple of unusual error situations where the daemon does write
5493 log entries, and I had neglected to close the log afterwards.
5495 30. The text of an SMTP error response that was received during a remote
5496 delivery was being truncated at 512 bytes. This is too short for some of
5497 the long messages that one sometimes sees. I've increased the limit to
5500 31. It is now possible to make retry rules that apply only when a message has a
5501 specific sender, in particular, an empty sender.
5503 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5504 it possible to be selective about when SMTP synchronization is enforced.
5506 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5508 32. Implemented hosts_connection_nolog.
5510 33. Added an ACL for QUIT.
5512 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5515 35. Added mailbox_size and mailbox_filecount to appendfile.
5517 36. Added control = no_multiline_responses to ACLs.
5519 37. There was a bug in the logic of the code that waits for the clock to tick
5520 in the case where the clock went backwards by a substantial amount such
5521 that the microsecond fraction of "now" was more than the microsecond
5522 fraction of "then" (but the whole seconds number was less).
5524 38. Added support for the libradius Radius client library this is found on
5525 FreeBSD (previously only the radiusclient library was supported).
5531 1. When certain lookups returned multiple values in the form name=value, the
5532 quoting of the values was not always being done properly. Specifically:
5533 (a) If the value started with a double quote, but contained no whitespace,
5535 (b) If the value contained whitespace other than a space character (i.e.
5536 tabs or newlines or carriage returns) it was not quoted.
5537 This fix has been applied to the mysql and pgsql lookups by writing a
5538 separate quoting function and calling it from the lookup code. The fix
5539 should probably also be applied to nisplus, ibase and oracle lookups, but
5540 since I cannot test any of those, I have not disturbed their existing code.
5542 2. A hit in the callout cache for a specific address caused a log line with no
5543 reason for rejecting RCPT. Now it says "Previous (cached) callout
5544 verification failure".
5546 3. There was an off-by-one bug in the queryprogram router. An over-long
5547 return line was truncated at 256 instead of 255 characters, thereby
5548 overflowing its buffer with the terminating zero. As well as fixing this, I
5549 have increased the buffer size to 1024 (and made a note to document this).
5551 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5552 when Exim is waiting for an SMTP response from a remote server, Exim
5553 restarts its select() call on the socket, thereby resetting its timeout.
5554 This is not a problem when such interrupts are rare. Somebody set up a cron
5555 job to run exiwhat every 2 minutes, which is less than the normal select()
5556 timeout (5 or 10 minutes). This meant that the select() timeout never
5557 kicked in because it was always reset. I have fixed this by comparing the
5558 time when an interrupt arrives with the time at the start of the first call
5559 to select(). If more time than the timeout has elapsed, the interrupt is
5560 treated as a timeout.
5562 5. Some internal re-factoring in preparation for the addition of Sieve
5563 extensions (by MH). In particular, the "personal" test is moved to a
5564 separate function, and given an option for scanning Cc: and Bcc: (which is
5565 not set for Exim filters).
5567 6. When Exim created an email address using the login of the caller as the
5568 local part (e.g. when creating a From: or Sender: header line), it was not
5569 quoting the local part when it contained special characters such as @.
5571 7. Installed new OpenBSD configuration files.
5573 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5574 try to make them clearer.
5576 9. Callout options, other than the timeout value, were being ignored when
5577 verifying sender addresses in header lines. For example, when using
5579 verify = header_sender/callout=no_cache
5581 the cache was (incorrectly) being used.
5583 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5584 only the Cygwin environment.
5586 11. When return_path_on_delivery was set as a log selector, if different remote
5587 addresses in the same message used different return paths and parallel
5588 remote delivery occurred, the wrong values would sometimes be logged.
5589 (Whenever a remote delivery process finished, the return path value from
5590 the most recently started remote delivery process was logged.)
5592 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5593 lines when AUTH and/or TLS are in use. This is the "received protocol"
5594 field. Exim used to use "asmtp" for authenticated SMTP, without any
5595 indication (in the protocol name) for TLS use. Now it follows the RFC and
5596 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5597 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5598 names appear in log lines as well as in Received: header lines.
5600 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5601 extensions, and comparison tests, and to fix some bugs.
5603 14. Changes to the "personal" filter test:
5605 (1) The test was buggy in that it was just doing the equivalent of
5606 "contains" tests on header lines. For example, if a user's address was
5607 anne@some.where, the "personal" test would incorrectly be true for
5609 To: susanne@some.where
5611 This test is now done by extracting each address from the header in turn,
5612 and checking the entire address. Other tests that are part of "personal"
5613 are now done using regular expressions (for example, to check local parts
5614 of addresses in From: header lines).
5616 (2) The list of non-personal local parts in From: addresses has been
5617 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5618 taken from the Sieve specification recommendations.
5620 (3) If the message contains any header line starting with "List-" it is
5621 treated as non-personal.
5623 (4) The test for "circular" in the Subject: header line has been removed
5624 because it now seems ill-conceived.
5626 15. Minor typos in src/EDITME comments corrected.
5628 16. Installed latest exipick from John Jetmore.
5630 17. If headers_add on a router specified a text string that was too long for
5631 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5632 of string_sprintf() is now avoided.
5634 18. $message_body_size was not set (it was always zero) when running the DATA
5635 ACL and the local_scan() function.
5637 19. For the "mail" command in an Exim filter, no default was being set for
5638 the once_repeat time, causing a random time value to be used if "once" was
5639 specified. (If the value happened to be <= 0, no repeat happened.) The
5640 default is now 0s, meaning "never repeat". The "vacation" command was OK
5641 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5642 (I found it when inspecting the code).
5644 20. There is now an overall timeout for performing a callout verification. It
5645 defaults to 4 times the callout timeout, which applies to individual SMTP
5646 commands during the callout. The overall timeout applies when there is more
5647 than one host that can be tried. The timeout is checked before trying the
5648 next host. This prevents very long delays if there are a large number of
5649 hosts and all are timing out (e.g. when the network connections are timing
5650 out). The value of the overall timeout can be changed by specifying an
5651 additional sub-option for "callout", called "maxwait". For example:
5653 verify = sender/callout=5s,maxwait=20s
5655 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5656 to the end before writing, but this should make it even safer).
5658 22. Exim was forgetting that it had advertised PIPELINING for the second and
5659 subsequent messages on an SMTP connection. It was also not resetting its
5660 memory on STARTTLS and an internal HELO.
5662 23. When Exim logs an SMTP synchronization error within a session, it now
5663 records whether PIPELINING has been advertised or not.
5665 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5666 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5667 rather than long int.
5669 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5671 26. Added the never_mail option to autoreply.
5677 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5678 crash if the getsockname() call failed; this can happen if a connection is
5679 closed very soon after it is established. The problem was simply in the
5680 order in which certain operations were done, causing Exim to try to write
5681 to the SMTP stream before it had set up the file descriptor. The bug has
5682 been fixed by making things happen in the correct order.
5688 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5689 before the connection was closed, thus losing the rejection response.
5691 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5692 some early Solaris releases, but causes trouble in current releases where
5693 socklen_t is defined.
5695 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5698 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5701 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5702 that releasing the top of it at the end releases what was used for sub-
5703 expansions (unless the block got too big). However, discard this block if
5704 the first thing is a variable or header, so that we can use its block when
5705 it is dynamic (useful for very large $message_headers, for example).
5707 6. Lookups now cache *every* query, not just the most recent. A new, separate
5708 store pool is used for this. It can be recovered when all lookup caches are
5709 flushed. Lookups now release memory at the end of their result strings.
5710 This has involved some general refactoring of the lookup sources.
5712 7. Some code has been added to the store_xxx() functions to reduce the amount
5713 of flapping under certain conditions.
5715 8. log_incoming_interface used to affect only the <= reception log lines. Now
5716 it causes the local interface and port to be added to several more SMTP log
5717 lines, for example "SMTP connection from", and rejection lines.
5719 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5721 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5723 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5724 could be overwritten at the end of the current message (or the start of a
5725 new message if it was set in a HELO ACL). The value is now preserved for
5726 the duration of the SMTP connection.
5728 12. If a transport had a headers_rewrite setting, and a matching header line
5729 contained an unqualified address, that address was qualified, even if it
5730 did not match any rewriting rules. The underlying bug was that the values
5731 of the flags that permit the existence of unqualified sender and recipient
5732 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5733 non-local messages, and by -bnq for local messages) were not being
5734 preserved with the message after it was received.
5736 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5737 "next input=" as part of the text comprising the host identity instead of
5738 the correct text. The code was using the same buffer for two different
5739 strings. However, depending on which order the printing function evaluated
5740 its arguments, the bug did not always show up. Under Linux, for example, my
5741 test suite worked just fine.
5743 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5744 doesn't work with some older versions of Perl. It has been changed to "my",
5745 which in any case is probably the better facility to use.
5747 15. A really picky compiler found some instances of statements for creating
5748 error messages that either had too many or two few arguments for the format
5751 16. The size of the buffer for calls to the DNS resolver has been increased
5752 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5753 for addresses that have a lot of PTR records. This alleviates a problem; it
5754 does not fully solve it.
5756 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5757 buffer now truncates the list and logs the incident, which is the same
5758 action as happens when Exim is looking up a host name and its aliases.
5759 Previously in this situation something unpredictable would happen;
5760 sometimes it was "internal error: store_reset failed".
5762 18. If a server dropped the connection unexpectedly when an Exim client was
5763 using GnuTLS and trying to read a response, the client delivery process
5764 crashed while trying to generate an error log message.
5766 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5767 string, for example:
5769 warn message = H1: something\nH2: something
5771 the text was added as a single header line from Exim's point of view
5772 though it ended up OK in the delivered message. However, searching for the
5773 second and subsequent header lines using $h_h2: did not work. This has been
5774 fixed. Similarly, if a system filter added multiple headers in this way,
5775 the routers could not see them.
5777 20. Expanded the error message when iplsearch is called with an invalid key to
5778 suggest using net-iplsearch in a host list.
5780 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5781 ACLs are no longer actually imposed (and a message to that effect is
5784 22. If a "gecos" field in a passwd entry contained escaped characters, in
5785 particular, if it contained a \" sequence, Exim got it wrong when building
5786 a From: or a Sender: header from that name. A second bug also caused
5787 incorrect handling when an unquoted " was present following a character
5788 that needed quoting.
5790 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5791 was not being matched caselessly.
5793 24. Arranged for all hyphens in the exim.8 source to be escaped with
5796 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5797 properly. Recipient callout cache records were still being keyed to include
5798 the sender, even when use_sender was set false. This led to far more
5799 callouts that were necessary. The sender is no longer included in the key
5800 when use_sender is false.
5802 26. Added "control = submission" modifier to ACLs.
5804 27. Added the ${base62d: operator to decode base 62 numbers.
5806 28. dnsdb lookups can now access SRV records.
5808 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5809 the configuration file.
5811 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5812 (-v) mode. This makes the output for a verbose queue run more intelligible.
5814 31. Added a use_postmaster feature to recipient callouts.
5816 32. Added the $body_zerocount variable, containing the number of binary zero
5817 bytes in the message body.
5819 33. The time of last modification of the "new" subdirectory is now used as the
5820 "mailbox time last read" when there is a quota error for a maildir
5823 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5825 35. Added +ignore_unknown as a special item in host lists.
5827 36. Code for decoding IPv6 addresses in host lists is now included, even if
5828 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5829 address was recognized as an IP address, but was then not correctly decoded
5830 into binary, causing unexpected and incorrect effects when compared with
5837 1. Very minor rewording of debugging text in manualroute to say "list of
5838 hosts" instead of "hostlist".
5840 2. If verify=header_syntax was set, and a header line with an unqualified
5841 address (no domain) and a large number of spaces between the end of the
5842 name and the colon was received, the reception process suffered a buffer
5843 overflow, and (when I tested it) crashed. This was caused by some obsolete
5844 code that should have been removed. The fix is to remove it!
5846 3. When running in the test harness, delay a bit after writing a bounce
5847 message to get a bit more predictability in the log output.
5849 4. Added a call to search_tidyup() just before forking a reception process. In
5850 theory, someone could use a lookup in the expansion of smtp_accept_max_
5851 per_host which, without the tidyup, could leave open a database connection.
5853 5. Added the variables $recipient_data and $sender_data which get set from a
5854 lookup success in an ACL "recipients" or "senders" condition, or a router
5855 "senders" option, similar to $domain_data and $local_part_data.
5857 6. Moved the writing of debug_print from before to after the "senders" test
5860 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5861 problems for message scanning, either using a data ACL, or using
5862 local_scan() because the Received: header was not generated till after they
5863 were called (in order to set the time as the time of reception completion).
5864 I have revised the way this works. The header is now generated after the
5865 body is received, but before the ACL or local_scan() are called. After they
5866 are run, the timestamp in the header is updated.
5872 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5873 before starting a queue runner without re-exec. This happened only when
5874 deliver_drop_privilege was set or when the Exim user was set to root. The
5875 effect of the bug was that timeouts during subsequent deliveries caused
5876 crashes instead of being properly handled. The handler is now left at its
5877 default (and expected) setting.
5879 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5880 message, again when deliver_drop_privilege is set or Exim is run as root.
5881 The bug described in (1) was not present in this case, but the tidying up
5882 of the other signals was missing. I have made the two cases consistent.
5884 3. The ignore_target_hosts setting on a manualroute router was being ignored
5885 for hosts that were looked up using the /MX notation.
5887 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5890 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5891 operated on the sender address. After changing the $sender_address to <>
5892 for the sender address verify, Exim was re-instated it as the original
5893 (before rewriting) address, but remembering that it had rewritten it, so it
5894 wasn't rewriting it again. This bug also had the effect of breaking the
5895 sender address verification caching when the sender address was rewritten.
5897 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5898 This has been changed so that if the ip literal address matches
5899 ignore_target_hosts, the router declines.
5901 7. Added expansion conditions match_domain, match_address, and match_local_
5902 part (NOT match_host).
5904 8. The placeholder for the Received: header didn't have a length field set.
5906 9. Added code to Exim itself and to exim_lock to test for a specific race
5907 condition that could lead to file corruption when using MBX delivery. The
5908 issue is with the lockfile that is created in /tmp. If this file is removed
5909 after a process has opened it but before that process has acquired a lock,
5910 there is the potential for a second process to recreate the file and also
5911 acquire a lock. This could lead to two Exim processes writing to the file
5912 at the same time. The added code performs the same test as UW imapd; it
5913 checks after acquiring the lock that its file descriptor still refers to
5914 the same named file.
5916 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5917 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5920 11. Added the smtp_active_hostname option. If used, this will typically be made
5921 to depend on the incoming interface address. Because $interface_address is
5922 not set up until the daemon has forked a reception process, error responses
5923 that can happen earlier (such as "too many connections") no longer contain
5926 12. If an expansion in a condition on a "warn" statement fails because a lookup
5927 defers, the "warn" statement is abandoned, and the next ACL statement is
5928 processed. Previously this caused the whole ACL to be aborted.
5930 13. Added the iplsearch lookup type.
5932 14. Added ident_timeout as a log selector.
5934 15. Added tls_certificate_verified as a log selector.
5936 16. Added a global option tls_require_ciphers (compare the smtp transport
5937 option of the same name). This controls incoming TLS connections.
5939 17. I finally figured out how to make tls_require_ciphers do a similar thing
5940 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5941 before starting the TLS session.
5943 18. Tabs are now shown as \t in -bP output.
5945 19. If the log selector return_path_on_delivery was set, Exim crashed when
5946 bouncing a message because it had too many Received: header lines.
5948 20. If two routers both had headers_remove settings, and the first one included
5949 a superfluous trailing colon, the final name in the first list and the
5950 first name in the second list were incorrectly joined into one item (with a
5951 colon in the middle).
5957 1. Added -C and -D options to the exinext utility, mainly to make it easier
5958 to include in the automated testing, but these could be helpful when
5959 multiple configurations are in use.
5961 2. The exinext utility was not formatting the output nicely when there was
5962 an alternate port involved in the retry record key, nor when there was a
5963 message id as well (for retries that were specific to a specific message
5964 and a specific host). It was also confused by IPv6 addresses, because of
5965 the additional colons they contain. I have fixed the IPv4 problem, and
5966 patched it up to do a reasonable job for IPv6.
5968 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5969 delivery, the log line now contains "pipelined" if PIPELINING was used.
5971 4. An SMTP transport process used to panic and die if the bind() call to set
5972 an explicit outgoing interface failed. This has been changed; it is now
5973 treated in the same way as a connect() failure.
5975 5. A reference to $sender_host_name in the part of a conditional expansion
5976 that was being skipped was still causing a DNS lookup. This no longer
5979 6. The def: expansion condition was not recognizing references to header lines
5980 that used bh_ and bheader_.
5982 7. Added the _cache feature to named lists.
5984 8. The code for checking quota_filecount in the appendfile transport was
5985 allowing one more file than it should have been.
5987 9. For compatibility with Sendmail, the command line option
5995 and sets the incoming protocol and host name (for trusted callers). The
5996 host name and its colon can be omitted when only the protocol is to be set.
5997 Note the Exim already has two private options, -pd and -ps, that refer to
5998 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5999 "s", but I don't think that's a major issue.
6001 10. A number of refactoring changes to the code, none of which should affect
6004 (a) The number of logging options was getting close to filling up the
6005 32-bit word that was used as a bit map. I have split them into two classes:
6006 those that are passed in the argument to log_write(), and those that are
6007 only ever tested independently outside of that function. These are now in
6008 separate 32-bit words, so there is plenty of room for expansion again.
6009 There is no change in the user interface or the logging behaviour.
6011 (b) When building, for example, log lines, the code previously used a
6012 macro that called string_cat() twice, in order to add two strings. This is
6013 not really sufficiently general. Furthermore, there was one instance where
6014 it was actually wrong because one of the argument was used twice, and in
6015 one call a function was used. (As it happened, calling the function twice
6016 did not affect the overall behaviour.) The macro has been replaced by a
6017 function that can join an arbitrary number of extra strings onto a growing
6020 (c) The code for expansion conditions now uses a table and a binary chop
6021 instead of a serial search (which was left over from when there were very
6022 few conditions). Also, it now recognizes conditions like "pam" even when
6023 the relevant support is not compiled in: a suitably worded error message is
6024 given if an attempt is made to use such a condition.
6026 11. Added ${time_interval:xxxxx}.
6028 12. A bug was causing one of the ddress fields not to be passed back correctly
6029 from remote delivery subprocesses. The field in question was not being
6030 subsequently used, so this caused to problems in practice.
6032 13. Added new log selectors queue_time and deliver_time.
6034 14. Might have fixed a bug in maildirsizefile handling that threw up
6035 "unexpected character" debug warnings, and recalculated the data
6036 unnecessarily. In any case, I expanded the warning message to give more
6039 15. Added the message "Restricted characters in address" to the statements in
6040 the default ACL that block characters like @ and % in local parts.
6042 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6043 Three changes have been made:
6045 (a) There was a serious bug; a negative response to MAIL caused the whole
6046 recipient domain to be cached as invalid, thereby blocking all messages
6047 to all local parts at the same domain, from all senders. This bug has
6048 been fixed. The domain is no longer cached after a negative response to
6049 MAIL if the sender used is not empty.
6051 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6054 (c) A new callout option, "use_sender" has been added for people who want
6055 the modified behaviour.
6061 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6064 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6065 indeed breaks things for older releases.
6067 3. Added additional logging to the case where there is a problem reading data
6068 from a filter that is running in a subprocess using a pipe, in order to
6069 try to track down a specific problem.
6071 4. Testing facility fudge: when running in the test harness and attempting
6072 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6073 getting "No route to host". Convert this to a timeout.
6075 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6078 6. Some OS don't have socklen_t but use size_t instead. This affects the
6079 fifth argument of getsockopt() amongst other things. This is now
6080 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6081 can be set for individual OS. I have set it for SunOS5, OSF1, and
6082 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6083 some earlier ones do not.
6085 7. Change 4.30/15 was not doing the test caselessly.
6087 8. The standard form for an IPv6 address literal was being rejected by address
6088 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6089 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6090 this, as well as the form without the "IPv6" on the front (but only when
6091 address literals are enabled, of course).
6093 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6095 10. Exim crashed if a message with an empty sender address specified by -f
6096 encountered a router with an errors_to setting. This could be provoked only
6097 by a command such as
6101 where an empty string was supplied; "<>" did not hit this bug.
6103 11. Installed PCRE release 4.5.
6105 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6106 remained set. It is now erased.
6108 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6109 times from message ids (which are base 36 rather than the normal 62).
6111 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6112 were being counted as actual protocol errors, and logged if the log
6113 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6114 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6115 and DATA following a set of rejected RCPTs do not count as protocol errors.
6116 In other words, Exim assumes they were pipelined, though this may not
6117 actually be the case. Of course, in all cases the client gets an
6118 appropriate error code.
6120 15. If a lookup fails in an ACL condition, a message about the failure may
6121 be available; it is used if testing the ACL cannot continue, because most
6122 such messages specify what the cause of the deferral is. However, some
6123 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6124 that caused an old message to be retained and used if a later statement
6125 caused a defer, replacing the real cause of the deferral.
6127 16. If an IP address had so many PTR records that the DNS lookup buffer
6128 was not large enough to hold them, Exim could crash while trying to process
6129 the truncated data. It now detects and logs this case.
6131 17. Further to 4.21/58, another change has been made: if (and only if) the
6132 first line of a message (the first header line) ends with CRLF, a bare LF
6133 in a subsequent header line has a space inserted after it, so as not to
6134 terminate the header.
6136 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6137 unnecessarily, used atoi() instead of strtol(), and didn't check the
6138 termination when getting file sizes from file names by regex.
6140 19. Completely re-implemented the support for maildirsize files, in the light
6141 of a number of problems with the previous contributed implementation
6142 (4.30/29). In particular:
6144 . If the quota is zero, the maildirsize file is maintained, but no quota is
6147 . If the maildir directory does not exist, it is created before any attempt
6148 to write a maildirsize file.
6150 . The quota value in the file is just a cache; if the quota is changed in
6151 the transport, the new value overrides.
6153 . A regular expression is available for excluding directories from the
6156 20. The autoreply transport checks the characters in options that define the
6157 message's headers; it allows continued headers, but it was checking with
6158 isspace() after an embedded newline instead of explicitly looking for a
6161 21. If all the "regular" hosts to which an address was routed had passed their
6162 expiry times, and had not reached their retry times, the address was
6163 bounced, even if fallback hosts were defined. Now Exim should go on to try
6166 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6167 equivalent code in the SMTP transport. Some hosts send humungous responses
6168 to HELO/EHLO, more than 1024 it seems.
6170 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6171 gives compiler warnings in some environments. I've now done it "properly",
6174 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6175 (because of problems with the built-in one) was declared to return uschar *
6176 instead of char *, causing compiler failure.
6178 25. Fixed a file descriptor leak when processing alias/forward files.
6180 26. Fixed a minor format string issue in dbfn.c.
6182 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6184 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6185 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6188 29. When a sender address is verified, it is cached, to save repeating the test
6189 when there is more than one recipient in a message. However, when the
6190 verification involves a callout, it is possible for different callout
6191 options to be set for different recipients. It is too complicated to keep
6192 track of this in the cache, so now Exim always runs a verification when a
6193 callout is required, relying on the callout cache for the optimization.
6194 The overhead is duplication of the address routing, but this should not be
6197 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6198 to be verified with callout=postmaster, and the main callout worked but the
6199 postmaster check failed, the verification correctly failed. However, if a
6200 subsequent RCPT command asked for sender verification *without* the
6201 postmaster check, incorrect caching caused this verification also to fail,
6204 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6205 it was not caching the DNS options (qualify_single, search_parents) that
6206 were used when the lookup failed. A subsequent lookup with different
6207 options therefore always gave the same answer, though there were cases
6208 where it should not have. (Example: a "domains = !$mx_any" option on a
6209 dnslookup router: the "domains" option is always processed without any
6210 widening, but the router might have qualify_single set.) Now Exim uses the
6211 cached value only when the same options are set.
6213 32. Added John Jetmore's "exipick" utility to the distribution.
6215 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6216 than a timeout (e.g. a certificate is required, and is not provided), an
6217 Exim server now closes the connection immediately. Previously it waited for
6218 the client to close - but if the client is SSL, it seems that they each
6219 wait for each other, leading to a delay before one of them times out.
6221 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6222 maintained 0.8.x compatibility because I don't think many are using it, and
6223 it is clearly obsolete.
6225 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6228 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6229 client certificate was expired. A simple patch fixes this, though I don't
6230 understand the full logic of why the verify callback is called multiple
6233 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6234 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6235 which causes problems with some clients (such as the Certicom SSL Plus
6236 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6237 disables the coutermeasure allowing Eudora to connect."
6239 38. Exim was not checking that a write() to a log file succeeded. This could
6240 lead to Bad Things if a log got too big, in particular if it hit a file
6241 size limit. Exim now panics and dies if it cannot write to a log file, just
6242 as it does if it cannot open a log file.
6244 39. Modified OS/Makefile-Linux so that it now contains
6246 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6248 The two -D definitions ensure that Exim is compiled with large file
6249 support, which makes it possible to handle log files that are bigger than
6252 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6253 instance) a domain was checked against a named list that involved a lookup,
6254 causing $domain_data to be set, then another domain was checked against the
6255 same list, then the first domain was re-checked, the value of $domain_data
6256 after the final check could be wrong. In particular, if the second check
6257 failed, it could be set empty. This bug probably also applied to
6260 41. The strip_trailing_dot option was not being applied to the address given
6261 with the -f command-line option.
6263 42. The code for reading a message's header from the spool was incrementing
6264 $received_count, but never initializing it. This meant that the value was
6265 incorrect (doubled) while delivering a message in the same process in which
6266 it was received. In the most common configuration of Exim, this never
6267 happens - a fresh exec is done - but it can happen when
6268 deliver_drop_privilege is set.
6270 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6271 it now includes up to 150 characters of the unexpected data in the log
6274 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6275 and building data strings. The size of both of these buffers was 10 000
6276 bytes - far larger than anybody would *ever* want, thought I. Needless to
6277 say, somebody hit the limit. I have increased the maximum line length to
6278 20 000 and the maximum data length of concatenated lines to 100 000. I have
6279 also fixed two bugs, because there was no checking on these buffers. Tsk,
6280 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6281 buffer is too small.
6283 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6284 lsearch lookups. Now it does.
6286 46. When parsing a route_list item in a manualroute router, a fixed-length
6287 buffer was used for the list of hosts. I made this 1024 bytes long,
6288 thinking that nobody would ever have a list of hosts that long. Wrong.
6289 Somebody had a whole pile of complicated expansion conditions, and the
6290 string was silently truncated, leading to an expansion error. It turns out
6291 that it is easier to change to an unlimited length (owing to other changes
6292 that have happened since this code was originally written) than to build
6293 structure for giving a limitation error. The length of the item that
6294 expands into the list of hosts is now unlimited.
6296 47. The lsearch lookup could not handle data where the length of text line was
6297 more than 4095 characters. Such lines were truncated, leading to shortened
6298 data being returned. It should now handle lines of any length.
6300 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6301 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6304 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6305 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6306 no longer happens in comment lines. A list of replacements is now placed
6307 at the head of all of the source files, except those whose only change is
6308 to replace PERL_COMMAND in the very first #! line.
6310 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6311 messages on the queue, with a bottom-up merge sort, using code contributed
6312 by Michael Haardt. This should make operations like -bp somewhat faster on
6313 large queues. It won't affect queue runners, except when queue_run_in_order
6316 51. Installed eximstats 1.31 in the distribution.
6318 52. Added support for SRV lookups to the dnslookup router.
6320 53. If an ACL referred to $message_body or $message_body_end, the value was not
6321 reset for any messages that followed in the same SMTP session.
6323 54. The store-handling optimization for building very long strings was not
6324 differentiating between the different store pools. I don't think this
6325 actually made any difference in practice, but I've tidied it.
6327 55. While running the routers to verify a sender address, $sender_address
6328 was still set to the sender address. This is wrong, because when routing to
6329 send a bounce to the sender, it would be empty. Therefore, I have changed
6330 it so that, while verifying a sender address, $sender_address is set to <>.
6331 (There is no change to what happens when verifying a recipient address.)
6333 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6334 target A or AAAA records (if not already returned) without resetting the
6335 qualify_single or search_parents options of the DNS resolver. These are
6336 inappropriate in this case because the targets of MX and SRV records must
6337 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6338 target that, when qualified, matched something in the local domain. These
6339 two options are now turned off when doing these lookups.
6341 57. It seems that at least some releases of Reiserfs (which does not have the
6342 concept of a fixed number of inodes) returns zero and not -1 for the
6343 number of available inodes. This interacted badly with check_spool_inodes,
6344 which assumed that -1 was the "no such thing" setting. What I have done is
6345 to check that the total number of inodes is greater than zero before doing
6346 the test of how many are available.
6348 58. When a "warn" ACL statement has a log_message modifier, the message is
6349 remembered, and not repeated. This is to avoid a lot of repetition when a
6350 message has many recipients that cause the same warning to be written.
6351 However, Exim was preserving the list of already written lines for an
6352 entire SMTP session, which doesn't seem right. The memory is now reset if a
6353 new message is started.
6355 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6356 debugging output unless log_rewrite was also set.
6358 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6359 of (int)(handle) when we know that handle contains (void *)(-1).
6361 61. The Exim daemon panic-logs an error return when it closes the incoming
6362 connection. However "connection reset by peer" seems to be common, and
6363 isn't really an error worthy of noting specially, so that particular error
6366 62. When Exim is trying to find all the local interfaces, it used to panic and
6367 die if the ioctl to get the interface flags failed. However, it seems that
6368 on at least one OS (Solaris 9) it is possible to have an interface that is
6369 included in the list of interfaces, but for which you get a failure error
6370 for this call. This happens when the interface is not "plumbed" into a
6371 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6372 failure of the "get flags" call assumes that the interface is down.
6374 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6375 makes life easier for people who are doing arithmetic on fields extracted
6376 from dates, where you often get leading zeros that should not be
6377 interpreted as octal.
6379 64. Added qualify_domain to the redirect router, to override the global
6382 65. If a pathologically long header line contained very many addresses (the
6383 report of this problem mentioned 10 000) and each of them was rewritten,
6384 Exim could use up a very large amount of memory. (It kept on making new
6385 copies of the header line as it rewrote, and never released the old ones.)
6386 At the expense of a bit more processing, the header rewriting function has
6387 been changed so that it no longer eats memory in this way.
6389 66. The generation of the Received: header has been moved from the time that a
6390 message starts to be received, to the time that it finishes. The timestamp
6391 in the Received: header should now be very close to that of the <= log
6392 line. There are two side-effects of this change:
6394 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6395 logged header lines no longer include the local Received: line, because
6396 it has not yet been created. The same applies to a copy of the message
6397 that is returned to a non-SMTP sender when a message is rejected.
6399 (b) When a filter file is tested using -bf, no additional Received: header
6400 is added to the test message. After some thought, I decided that this
6403 This change does not affect the value of $received_for. It is still set
6404 after address rewriting, but before local_scan() is called.
6406 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6408 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6409 gave an unhelpful panic error message, and a defer error. I have managed to
6410 change this behaviour so that it now rejects any supplied certificate,
6411 which seems right, as the list of acceptable certificates is empty.
6413 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6414 gave an unhelpful defer error. I have not managed to make this reject any
6415 supplied certificates, but the error message it gives is "no certificate
6416 supplied", which is not helpful.
6418 70. exigrep's output now also includes lines that are not associated with any
6419 message, but which match the given pattern. Implemented by a patch from
6420 Martin Sluka, which also tidied up the Perl a bit.
6422 71. Recipient callout verification, like sender verification, was using <> in
6423 the MAIL FROM command. This isn't really the right thing, since the actual
6424 sender may affect whether the remote host accepts the recipient or not. I
6425 have changed it to use the actual sender in the callout; this means that
6426 the cache record is now keyed on a recipient/sender pair, not just the
6427 recipient address. There doesn't seem to be a real danger of callout loops,
6428 since a callout by the remote host to check the sender would use <>.
6429 [SEE ABOVE: changed after hitting problems.]
6431 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6432 temporary errors. However, in the case of such a code being given after
6433 the end of a data transmission (i.e. after ".") Exim was failing to write
6434 a retry record for the message. (Yes, there was some broken host that was
6435 actually sending 8xx at this point.)
6437 73. An unknown lookup type in a host list could cause Exim to panic-die when
6438 the list was checked. (An example that provoked this was putting <; in the
6439 middle of a list instead of at the start.) If this happened during a DATA
6440 ACL check, a -D file could be left lying around. This kind of configuration
6441 error no longer causes Exim to die; instead it causes a defer error. The
6442 incident is still logged to the main and panic logs.
6444 74. Buglet left over from Exim 3 conversion. The message "too many messages
6445 in one connection" was written to the rejectlog but not the mainlog, except
6446 when address rewriting (yes!) was being logged.
6448 75. Added write_rejectlog option.
6450 76. When a system filter was run not as root (that is, when system_filter_user
6451 was set), the values of the $n variables were not being returned to the
6452 main process; thus, they were not subsequently available in the $sn
6455 77. Added +return_path_on_delivery log selector.
6457 78. A connection timeout was being treated differently from recipients deferred
6458 when testing hosts_max_try with a message that was older than the host's
6459 retry timeout. (The host should not be counted, thus allowing all hosts to
6460 be tried at least once before bouncing.) This may have been the cause of an
6461 occasionally reported bug whereby a message would remain on the queue
6462 longer than the retry timeout, but would be bounced if a delivery was
6463 forced. I say "may" because I never totally pinned down the problem;
6464 setting up timeout/retry tests is difficult. See also the next item.
6466 79. The ultimate address timeout was not being applied to errors that involved
6467 a combination of host plus message (for example, a timeout on a MAIL
6468 command). When an address resolved to a number of possible hosts, and they
6469 were not all tried for each delivery (e.g. because of hosts_max_try), a
6470 message could remain on the queue longer than the retry timeout.
6472 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6475 81. Fixed an obscure SMTP outgoing bug which required at least the following
6476 conditions: (a) there was another message waiting for the same server;
6477 (b) the server returned 5xx to all RCPT commands in the first message so
6478 that the message was not completed; (c) the server dropped the connection
6479 or gave a negative response to the RSET that Exim sends to abort the
6480 transaction. The observed case was a dropped connection after DATA that had
6481 been sent in pipelining mode. That is, the server had advertised PIPELINING
6482 but was not implementing it correctly. The effect of the bug was incorrect
6483 behaviour, such as trying another host, and this could lead to a crash.
6489 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6490 and daemon.c were passed as pointers to ints; they should have been
6491 pointers to socklen_t variables (which are typically unsigned ints).
6493 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6496 3. Fixed a really odd bug that affected only the testing scheme; patching a
6497 certain fixed string in the binary changed the value of another string that
6498 happened to be identical to the end of the original first string.
6500 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6501 name", it returns that address as the IP address. On some operating
6502 systems (e.g. Solaris), it also passes back the IP address string as the
6503 "host name". However, on others (e.g. Linux), it passes back an empty
6504 string. Exim wasn't checking for this, and was changing the host name to an
6505 empty string, assuming it had been canonicalized.
6507 5. Although rare, it is permitted to have more than one PTR record for a given
6508 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6509 all the names associated with an address, because they do in Solaris.
6510 However, it seems that they do not in Linux for data that comes from the
6511 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6512 I found this out when I moved to a new Linux workstation and tried to run
6513 the Exim test suite.
6515 To get round this problem I have changed the code so that it now does its
6516 own call to the DNS to look up PTR records when searching for a host name.
6517 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6518 addresses that are only in /etc/hosts are still found.
6520 This behaviour is, however, controlled by an option called host_lookup_
6521 order, which defaults to "bydns:byaddr". If people want to use the other
6522 order, or indeed, just use one or the other means of lookup, they can
6523 specify it in this variable.
6525 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6526 some operating systems, this comes back from gethostbyaddr() as an empty
6527 string, and this is what Exim used to test for. However, it seems that in
6528 other systems, "." is yielded. Exim now tests for this case too.
6530 7. The values of check_spool_space and check_log_space are now held internally
6531 as a number of kilobytes instead of an absolute number of bytes. If a
6532 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6533 kilobyte. This means that much larger values can be stored.
6535 8. Exim monitor: an attempt to get the action menu when not actually pointing
6536 at a message produces an empty menu entitled "No message selected". This
6537 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6538 no entries in it ("Shell widget menu has zero width and/or height"). So I
6539 have added a single, blank menu entry in this case.
6541 9. Added ${quote_local_part.
6543 10. MIME decoding is now applied to the contents of Subject: header lines when
6546 11. Now that a reference to $sender_host_address automatically causes a reverse
6547 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6548 host lookup before query-style lookups in lists that might use this
6549 variable. This has therefore been abolished, and the "net-" prefix is no
6550 longer necessary for query-style lookups.
6552 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6553 have been a typo for LFLAGS, so it has been changed.
6555 13. The install script calls Exim with "-C /dev/null" in order to find the
6556 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6557 to be output. However, since Exim outputs its version number before the
6558 error, it didn't break the script. It just looked ugly. I fixed this by
6559 always allowing "-C /dev/null" if the caller is root.
6561 14. Ignore overlarge ACL variable number when reading spool file - insurance
6562 against a later release with more variables having written the file.
6564 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6565 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6566 this, as well as the form without the "IPv6" on the front.
6568 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6569 OS/Makefile-Darwin file.
6571 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6572 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6574 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6575 variable. However, some OS use ints for inodes. I've added cast to long int
6576 to get rid of the compiler warning.
6578 19. I had forgotten to lock out "/../" in configuration file names when
6579 ALT_CONFIG_PREFIX was set.
6581 20. Routers used for verification do not need to specify transports. However,
6582 if such a router generated a host list, and callout was configured, Exim
6583 crashed, because it could not find a port number from the (non-existent)
6584 transport. It now assumes port 25 in this circumstance.
6586 21. Added the -t option to exigrep.
6588 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6589 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6590 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6591 them is set, LOOKUP_LSEARCH is forced.
6593 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6595 24. Added sender and host information to the "rejected by local_scan()" log
6596 line; previously there was no indication of these.
6598 25. Added .include_if_exists.
6600 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6601 Linux. It turns out that not all file systems support this. Apparently some
6602 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6603 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6604 not supported on the file descriptor, is now ignored when Exim is trying to
6605 sync a directory. This applies only to Linux.
6607 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6609 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6610 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6613 29. Added support for maildirsize files from supplied patch (modified a bit).
6615 30. The use of :fail: followed by an empty string could lead Exim to respond to
6616 sender verification failures with (e.g.):
6618 550 Verification failed for <xxx>
6619 550 Sender verify failed
6621 where the first response line was missing the '-' that indicates it is not
6622 the final line of the response.
6624 31. The loop for finding the name of the user that called Exim had a hardwired
6625 limit of 10; it now uses the value of finduser_retries, which is used for
6626 all other user lookups.
6628 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6631 33. Exim was neglecting to zero errno before one call of strtol() when
6632 expanding a string and expecting an integer value. On some systems this
6633 resulted in spurious "integer overflow" errors. Also, it was casting the
6634 result into an int without checking.
6636 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6637 did not work. The code looks as if it has *never* worked, though it appears
6638 to have been documented since at least release 1.62. I have made it work.
6640 35. The "timeout_DNS" error in retry rules, also documented since at least
6641 1.62, also never worked. As it isn't clear exactly what this means, and
6642 clearly it isn't a major issue, I have abolished the feature by treating it
6643 as "timeout", and writing a warning to the main and panic logs.
6645 36. The display of retry rules for -brt wasn't always showing the error code
6648 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6649 timeout_connect_A, timeout_connect_MX.
6651 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6652 to the empty sender.
6654 39. The daemon was not analysing the content of -oX till after it had closed
6655 stderr and disconnected from the controlling terminal. This meant that any
6656 syntax errors were only noted on the panic log, and the return code from
6657 the command was 0. By re-arranging the code a little, I've made the
6658 decoding happen first, so such errors now appear on stderr, and the return
6659 code is 1. However, the actual setting up of the sockets still happens in
6660 the disconnected process, so errors there are still only recorded on the
6663 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6664 connections (as happens on some IP stacks) was logged at start up time as
6665 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6666 it from "IPv6 and IPv4", which means that two separate sockets are being
6669 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6670 says whether AF_INET or AF_INET6 was passed as an argument.
6672 42. Exiwhat output was messed up when time zones were included in log
6675 43. Exiwhat now gives more information about the daemon's listening ports,
6676 and whether -tls-on-connect was used.
6678 44. The "port" option of the smtp transport is now expanded.
6680 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6681 silently ignored. Now an error message is written to the main and panic
6684 46. There's a new ACL modifier called "logwrite" which writes to a log file
6685 as soon as it is encountered.
6687 47. Added $local_user_uid and $local_user_gid at routing time.
6689 48. Exim crashed when trying to verify a sender address that was being
6692 49. Exim was recognizing only a space character after ".include". It now also
6693 recognizes a tab character.
6695 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6696 extracting the relevant information from the specification. The man page no
6697 longer contains scrambled data for the -d option, and I've added a section
6698 at the front about calling Exim under different names.
6700 51. Added "extra_headers" argument to the "mail" command in filter files.
6702 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6705 53. Installed eximstats 1.29.
6707 54. Added transport_filter_timeout as a generic transport option.
6709 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6710 Cc: header lines. This was required by RFC 822, but it not required by RFC
6713 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6714 incoming messages that did not have them. Now it does so only if the
6715 message originates locally, that is, if there is no associated remote host
6716 address. When Resent- header lines are present, this applies to the Resent-
6717 lines rather than the non-Resent- lines.
6719 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6720 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6722 58. Messages for configuration errors now include the name of the main
6723 configuration file - useful now that there may be more than one file in a
6724 list (.included file names were always shown).
6726 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6727 for those rare installations that do not start the daemon as root or run it
6728 setuid root. I've cut out the call to initgroups() if the daemon is not
6731 60. The Exim user and group can now be bound into the binary as text strings
6732 that are looked up at the start of Exim's processing.
6734 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6736 62. Added $mailstore_basename variable.
6738 63. Installed patch to sieve.c from Michael Haardt.
6740 64. When Exim failed to open the panic log after failing to open the main log,
6741 the original message it was trying to log was written to stderr and debug
6742 output, but if they were not available (the usual case in production), it
6743 was lost. Now it is written to syslog before the two lines that record the
6744 failures to open the logs.
6746 65. Users' Exim filters run in subprocesses under the user's uid. It is
6747 possible for a "deliver" command or an alias in a "personal" command to
6748 provoke an address rewrite. If logging of address rewriting is configured,
6749 this fails because the process is not running as root or exim. There may be
6750 a better way of dealing with this, but for the moment (because 4.30 needs
6751 to be released), I have disabled address rewrite logging when running a
6752 filter in a non-root, non-exim process.
6758 1. The buildconfig auxiliary program wasn't quoting the value set for
6759 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6760 not defined. This bug was masked in 4.22 by the effect that was fixed in
6763 2. Some messages that were rejected after a message id was allocated were
6764 shown as "incomplete" by exigrep. It no longer does this for messages that
6765 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6767 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6768 have allow_domain_literals set, the ID did not get logged in the <= line.
6769 Domain literals are now always recognized in Message-ID: header lines.
6771 4. The first argument for a ${extract expansion item is the key name or field
6772 number. Leading and trailing spaces in this item were not being ignored,
6773 causing some misleading effects.
6775 5. When deliver_drop_privilege was set, single queue runner processes started
6776 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6777 same command in the process it spins off) were not dropping privilege.
6779 6. When the daemon running as "exim" started a queue runner, it always
6780 re-executed Exim in the spun-off process. This is a waste of effort when
6781 deliver_drop_privilege is set. The new process now just calls the
6782 queue-runner function directly.
6788 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6791 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6792 ignored. Though the use of -oP was forcing the writing of a pid file, it
6793 was always written to the default place.
6795 3. If the message "no IP address found for host xxxx" is generated during
6796 incoming verification, it is now followed by identification of the incoming
6797 connection (so you can more easily find what provoked it).
6799 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6801 5. Added some features to "harden" Exim a bit more against certain attacks:
6803 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6804 be put in Local/Makefile. This is like the never_users runtime option,
6805 but it cannot be overridden. The default setting is "root".
6807 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6808 prefix string with which any file named in a -C command line option
6811 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6812 is retained for -C and -D only if the caller of Exim is root. Without
6813 it, the exim user may also use -C and -D and retain privilege.
6815 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6816 command line option is disabled.
6818 6. Macro names set by the -D option must start with an upper case letter, just
6819 like macro names defined in the configuration file.
6821 7. Added "dereference=" facility to LDAP.
6823 8. Two instances of the typo "uknown" in the source files are fixed.
6825 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6826 the Configure-Makefile script screwed up while processing it.
6828 10. Incorporated PCRE 4.4.
6830 11. The SMTP synchronization check was not operating right at the start of an
6831 SMTP session. For example, it could not catch a HELO sent before the client
6832 waited for the greeting. There is now a check for outstanding input at the
6833 point when the greeting is written. Because of the duplex, asynchronous
6834 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6835 way, but not yet received, when the check is performed.
6837 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6838 on TCP/IP sockets, because this apparently causes some broken clients to
6841 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6842 unchanged) from the Cygwin maintainer.
6844 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6845 was supported instead of testing for mbx. Effectively a typo.
6847 15. The spa authenticator server code was not checking that the input it
6848 received was valid base64.
6850 16. The debug output line for the "set" modifier in ACLs was not showing the
6851 name of the variable that was being set.
6853 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6855 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6856 lookup on its own. Something else was needed to trigger the lookup. For
6857 example, a match in host_lookup or the need for a host name in a host list.
6858 Now, if $sender_host_name is referenced and the host name has not yet been
6859 looked up, a lookup is performed. If the lookup fails, the variable remains
6860 empty, and $host_lookup_failed is set to "1".
6862 19. Added "eqi" as a case-independent comparison operator.
6864 20. The saslauthd authentication condition could segfault if neither service
6865 nor realm was specified.
6867 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6868 error message that was logged was misleading, and incoming SMTP
6869 connections were dropped. The message is now more accurate, and temporary
6870 errors are given to SMTP connections.
6872 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6873 (except RSET) with a 421 error, until QUIT is received. However, it was
6874 failing to send a response to QUIT.
6876 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6877 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6878 ACL is now run after the helo_try_verify_hosts code.
6880 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6881 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6882 case-independent, so other case variants are also recognized). Apparently
6883 some systems use these upper case variants.
6885 25. If more than two messages were waiting for the same host, and a transport
6886 filter was specified for the transport, Exim sent two messages over the
6887 same TCP/IP connection, and then failed with "socket operation on non-
6888 socket" when it tried to send the third.
6890 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6892 27. The extern definition of crypt16() in expand.c was not being excluded when
6893 the OS had its own crypt16() function.
6895 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6896 as a preferred synonym for return_size_limit, both as an option and as an
6899 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6901 30. Changed the default configuration ACL to relax the local part checking rule
6902 for addresses that are not in any local domains. For these addresses,
6903 slashes and pipe symbols are allowed within local parts, but the sequence
6904 /../ is explicitly forbidden.
6906 31. SPA server authentication was not clearing the challenge buffer before
6909 32. log_message in a "warn" ACL statement was writing to the reject log as
6910 well as to the main log, which contradicts the documentation and doesn't
6911 seem right (because no rejection is happening). So I have stopped it.
6913 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6914 However, I am unable to do any testing of this.
6916 34. Fixed an infelicity in the appendfile transport. When checking directories
6917 for a mailbox, to see if any needed to be created, it was accidentally
6918 using path names with one or more superfluous leading slashes; tracing
6919 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6921 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6922 contents are added to the log line that is written for every discarded
6923 recipient. (Previously a log_message setting was ignored.)
6925 36. The ${quote: operator now quotes the string if it is empty.
6927 37. The install script runs exim in order to find its version number. If for
6928 some reason other than non-existence or emptiness, which it checks, it
6929 could not run './exim', it was installing it with an empty version number,
6930 i.e. as "exim-". This error state is now caught, and the installation is
6933 38. An argument was missing from the function that creates an error message
6934 when Exim fails to connect to the socket for saslauthd authentication.
6935 This could cause Exim to crash, or give a corrupted message.
6937 39. Added isip, isip4, and isip6 to ${if conditions.
6939 40. The ACL variables $acl_xx are now saved with the message, and can be
6940 accessed later in routers, transports, and filters.
6942 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6943 strings in the file are not string-expanded.
6945 42. If a MAIL command specified a SIZE value that was too large to fit into an
6946 int variable, the check against message_size_limit failed. Such values are
6947 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6948 day this will have to be increased, but I don't think I want to be around
6949 when emails are that large.
6956 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6957 iconv() is not standard in FreeBSD.
6959 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6960 IPv6 enabled. The observed symptom was a segmentation fault on return from
6961 the function os_common_find_running_interfaces() in src/os.c.
6963 3. In the check_special_case() function in daemon.c I had used "errno" as an
6964 argument name, which causes warnings on some systems. This was basically a
6965 typo, since it was named "eno" in the comments!
6967 4. The code that waits for the clock to tick (at a resolution of some fraction
6968 of a second) so as to ensure message-id uniqueness was always waiting for
6969 at least one whole tick, when it could have waited for less. [This is
6970 almost certainly not relevant at current processor speeds, where it is
6971 unlikely to ever wait at all. But we try to future-proof.]
6973 5. The function that sleeps for a time interval that includes fractions of a
6974 second contained a race. It did not block SIGALRM between setting the
6975 timer, and suspending (a couple of lines later). If the interval was short
6976 and the sigsuspend() was delayed until after it had expired, the suspension
6977 never ended. On busy systems this could lead to processes getting stuck for
6980 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6981 process, before it forks any delivery processes. The open lookup caching
6982 mechanism meant that the open file or database connection was passed into
6983 the delivery process. The problem was that delivery processes always tidy
6984 up cached lookup data. This could cause a problem for the next delivery
6985 process started by the queue runner, because the external queue runner
6986 process does not know about the closure. So the next delivery process
6987 still has data in the lookup cache. In the case of a file lookup, there was
6988 no problem because closing a file descriptor in a subprocess doesn't affect
6989 the parent. However, if the lookup was caching a connection to a database,
6990 the connection was closed, and the second delivery process was likely to
6991 see errors such as "PGSQL: query failed: server closed the connection
6992 unexpectedly". The problem has been fixed by closing all cached lookups
6993 in a queue runner before running a delivery process.
6995 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6996 seem to have the "const" qualifier which it has on other OS. I've
6999 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7000 *of the same type* (client or server) with the same public name that an
7001 error should be diagnosed.
7003 9. When Exim looked up a host name for an IP address, but failed to find the
7004 original IP address when looking up the host name (a safety check), it
7005 output the message "<ip address> does not match any IP for NULL", which was
7006 confusing, to say the least. The bug was that the host name should have
7007 appeared instead of "NULL".
7009 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7010 user that is built into the binary, and the -C or -D options is used, root
7011 privilege is dropped before the configuration file is read. In addition,
7012 logging is switched to stderr instead of the normal log files. If the
7013 configuration then re-defines the Exim user, the unprivileged environment
7014 is probably not what is expected, so Exim logs a panic warning message (but
7017 However, if deliver_drop_privilege is set, the unprivileged state may well
7018 be exactly what is intended, so the warning has been cut out in that case,
7019 and Exim is allowed to try to write to its normal log files.
7025 1. smtp_return_error_details was not giving details for temporary sender
7026 or receiver verification errors.
7028 2. Diagnose a configuration error if two authenticators have the same public
7031 3. Exim used not to create the message log file for a message until the first
7032 delivery attempt. This could be confusing when incoming messages were held
7033 for policy or load reasons. The message log file is now created at the time
7034 the message is received, and an initial "Received" line is written to it.
7036 4. The automatically generated man page for command line options had a minor
7037 bug that caused no ill effects; however, a more serious problem was that
7038 the procedure for building the man page automatically didn't always
7039 operate. Consequently, release 4.20 contains an out-of-date version. This
7040 shouldn't happen again.
7042 5. When building Exim with embedded Perl support, the script that builds the
7043 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7044 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7046 6. The freeze_tell option was not being used for messages that were frozen on
7047 arrival, either by an ACL or by local_scan().
7049 7. Added the smtp_incomplete_transaction log selector.
7051 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7052 was accepting AUTH without a new EHLO.
7054 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7055 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7058 10. Logging of TCP/IP connections (when configured) now happens in the main
7059 daemon process instead of the child process, so that the TCP/IP connection
7060 count is more accurate (but it can never be perfect).
7062 11. The use of "drop" in a nested ACL was not being handled correctly in the
7063 outer ACL. Now, if condition failure induced by the nested "drop" causes
7064 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7065 or "require"), the connection is dropped.
7067 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7068 that yield "discard" can now be used with an "accept" or a "discard" verb,
7069 but an error is generated for any others (because I can't see a useful way
7070 to define what should happen).
7072 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7073 are now processed in the same way as lines in the Exim configuration file.
7074 In particular, continuation lines are supported.
7076 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7078 15. Added -ti meaning -t -i.
7080 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7081 domains, and warn by logging if others are found.
7083 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7084 returned from GIFCONF when Exim is trying to find the list of interfaces on
7085 a host. The code in os.c has been modified to copy each ifreq to an aligned
7086 structure in all cases.
7088 Also, in some cases, the returned ifreq's were being copied to a 'struct
7089 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7090 means the last couple of bytes of an IPv6 address could be chopped if the
7091 ifreq contained only a normal sockaddr (14 bytes storage).
7093 18. Named domain lists were not supported in the hosts_treat_as_local option.
7094 An entry such as +xxxx was not recognized, and was treated as a literal
7097 19. Ensure that header lines added by a DATA ACL are included in the reject log
7098 if the ACL subsequently rejects the message.
7100 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7101 MD5 (which is deprecated).
7103 21. When testing a filter file using -bf, Exim was writing a message when it
7104 took the sender from a "From " line in the message, but it was not doing so
7105 when it took $return_path from a Return-Path: header line. It now does.
7107 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7108 with a valid header line field name (a series of printing characters
7109 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7111 23. Changed "disc" in the source to "disk" to conform to the documentation and
7112 the book and for uniformity.
7114 24. Ignore Sendmail's -Ooption=value command line item.
7116 25. When execve() failed while trying to run a command in a pipe transport,
7117 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7118 could be confused with a return value of 69 from the command itself. This
7119 has been changed to 127, the value the shell returns if it is asked to run
7120 a non-existent command. The wording for the related log line suggests a
7121 non-existent command as the problem.
7123 26. If received_header_text expands to an empty string, do not add a Received:
7124 header line to the message. (Well, it adds a token one on the spool, but
7125 marks it "old" so that it doesn't get used or transmitted.)
7127 27. Installed eximstats 1.28 (addition of -nt option).
7129 28. There was no check for failure on the call to getsockname() in the daemon
7130 code. This can fail if there is a shortage of resources on the system, with
7131 ENOMEM, for example. A temporary error is now given on failure.
7133 29. Contrary to the C standard, it seems that in some environments, the
7134 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7135 program. Exim now does this explicitly; it affects the formatting of
7136 timestamps using strftime().
7138 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7139 complaints. I've now initialized all the variables, to avoid this.
7141 32. Header lines added by a system filter were not being "seen" during
7142 transport-time rewrites.
7144 33. The info_callback() function passed to OpenSSL is set up with type void
7145 (*)(SSL *, int, int), as described somewhere. However, when calling the
7146 function (actually a macro) that sets it up, the type void(*)() is
7147 expected. I've put in a cast to prevent warnings from picky compilers.
7149 34. If a DNS black list lookup found a CNAME record, but there were no A
7150 records associated with the domain it pointed at, Exim crashed.
7152 35. If a DNS black list lookup returned more than one A record, Exim ignored
7153 all but the first. It now scans all returned addresses if a particular IP
7154 value is being sought. In this situation, the contents of the
7155 $dnslist_value variable are a list of all the addresses, separated by a
7158 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7159 to accept a host name and all its aliases if the forward lookup for any of
7160 them yielded the IP address of the incoming connection. Now it accepts only
7161 those names whose forward lookup yields the correct IP address. Any other
7162 names are discarded. This closes a loophole whereby a rogue DNS
7163 administrator could create reverse DNS records to break through a
7164 wildcarded host restriction in an ACL.
7166 37. If a user filter or a system filter that ran in a subprocess used any of
7167 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7168 the wrong values were passed to the pipe command ($thisaddress had the
7169 value of $0, $0 had the value of $1, etc). This bug was introduced by
7170 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7172 38. Improved the line breaking for long SMTP error messages from ACLs.
7173 Previously, if there was no break point between 40 and 75 characters, Exim
7174 left the rest of the message alone. Two changes have been made: (a) I've
7175 reduced the minimum length to 35 characters; (b) if it can't find a break
7176 point between 35 and 75 characters, it looks ahead and uses the first one
7177 that it finds. This may give the occasional overlong line, but at least the
7178 remaining text gets split now.
7180 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7181 file descriptors might be low, and that setting 1000 would always raise it.
7182 It turns out that in some environments, the limit is already over 1000 and
7183 that lowering it causes trouble. So now Exim takes care not to decrease it.
7185 40. When delivering a message, the value of $return_path is set to $sender_
7186 address at the start of routing (routers may change the value). By an
7187 oversight, this default was not being set up when an address was tested by
7188 -bt or -bv, which affected the outcome if any router or filter referred to
7191 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7192 log only when "message" or "log_message" are set. However, if one of the
7193 conditions was an address verification, or a call to a nested ACL, the
7194 messages generated by the underlying test were being passed through. This
7195 no longer happens. The underlying message is available in $acl_verify_
7196 message for both "message" and "log_message" expansions, so it can be
7197 passed through if needed.
7199 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7200 new expansion $bh_ to give the encoded byte string without charset
7201 translation. Translation happens only if iconv() is available; HAVE_ICONV
7202 indicates this at build time. HEADERS_CHARSET gives the charset to
7203 translate to; headers_charset can change it in the configuration, and
7204 "headers charset" can change it in an individual filter file.
7206 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7207 that creates RFC 2047 encoded "words" labels them as that charset instead
7208 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7209 expansion operator; (ii) when Exim creates a From: line for a local
7210 message; (iii) when a header line is rewritten to include a "phrase" part.
7212 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7213 buggy, causing it to skip the first lines of messages whose message ID
7214 ended in 'D'. This would not have bitten before Exim release 4.14, because
7215 message IDs were unlikely to end in 'D' before then. The effect was to have
7216 incorrect size information for certain domains.
7218 45. #include "config.h" was missing at the start of the crypt16.c module. This
7219 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7222 46. If there was a timeout during a "random" callout check, Exim treated it as
7223 a failure of the random address, and carried on sending RSET and the real
7224 address. If the delay was just some slowness somewhere, the response to the
7225 original RCPT would be taken as a response to RSET and so on, causing
7226 mayhem of various kinds.
7228 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7229 when I implemented it. It didn't allow for the fact that some option values
7230 may legitimately be negative (e.g. size_addition), and it didn't even do
7231 the right test for positive values.
7233 48. Domain names in DNS records are case-independent. Exim always looks them up
7234 in lower case. Some resolvers return domain names in exactly the case they
7235 appear in the zone file, that is, they may contain uppercase letters. Not
7236 all resolvers do this - some return always lower case. Exim was treating a
7237 change of case by a resolver as a change of domain, similar to a widening
7238 of a domain abbreviation. This triggered its re-routing code and so it was
7239 trying to route what was effectively the same domain again. This normally
7240 caused routing to fail (because the router wouldn't handle the domain
7241 twice). Now Exim checks for this case specially, and just changes the
7242 casing of the domain that it ultimately uses when it transmits the message
7245 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7248 50. If a filter generated a file delivery with a non-absolute name (possible if
7249 no home directory exists for the router), the forbid_file option was not
7252 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7253 the existing equality matching.
7255 52. Exim was using ints instead of ino_t variables in some places where it was
7256 dealing with inode numbers.
7258 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7259 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7260 called TMPDIR, and if it finds it is different, it changes its value.
7262 54. The smtp_printf() function is now made available to local_scan() so
7263 additional output lines can be written before returning. There is also an
7264 smtp_fflush() function to enable the detection of a dropped connection.
7265 The variables smtp_input and smtp_batched_input are exported to
7268 55. Changed the default runtime configuration: the message "Unknown user"
7269 has been removed from the ACL, and instead placed on the localuser router,
7270 using the cannot_route_message feature. This means that any verification
7271 failures that generate their own messages won't get overridden. Similarly,
7272 the "Unrouteable address" message that was in the ACL for unverifiable
7273 relay addresses has also been removed.
7275 56. Added hosts_avoid_esmtp to the smtp transport.
7277 57. The exicyclog script was not checking for the esoteric option
7278 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7279 will work only if exicyclog is run under the appropriate euid.
7281 58. Following a discussion on the list, the rules by which Exim recognises line
7282 endings on incoming messages have been changed. The -dropcr and drop_cr
7283 options are now no-ops, retained only for backwards compatibility. The
7284 following line terminators are recognized: LF CRLF CR. However, special
7285 processing applies to CR:
7287 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7288 nor a local message in the state where . is a terminator.
7290 (ii) If a bare CR is encountered in a header line, an extra space is added
7291 after the line terminator so as not to end the header. The reasoning
7292 behind this is that bare CRs in header lines are most likely either
7293 to be mistakes, or people trying to play silly games.
7295 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7296 was being incorrectly given as 18 bytes larger than it should have been.
7297 This is a VOB (very old bug).
7299 60. This may never have affected anything current, but just in case it has:
7300 When the local host is found other than at the start of a list of hosts,
7301 the local host, those with the same MX, and any that follow, are discarded.
7302 When the list in question was part of a longer list of hosts, the following
7303 hosts (not currently being processed) were also being discarded. This no
7304 longer happens. I'm not sure if this situation could ever has previously
7307 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7310 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7311 header. This is something that is recommended in a new Internet Draft, and
7312 is something that is documented as being done by Sendmail. There are two
7313 possible values. For messages generated by the autoreply transport, Exim
7316 Auto-Submitted: auto-replied
7318 whereas for all other generated messages (e.g. bounces) it adds
7320 Auto-Submitted: auto-generated
7322 63. The "personal" condition in filters now includes a test for the
7323 Auto-Submitted: header. If it contains the string "auto-" the message it
7324 not considered personal.
7326 64. Added rcpt_include_affixes as a generic transport option.
7328 65. Added queue_only_override (default true).
7330 66. Added the syslog_duplication option.
7332 67. If what should have been the first header line of a message consisted of
7333 a space followed by a colon, Exim was mis-interpreting it as a header line.
7334 It isn't of course - it is syntactically invalid and should therefore be
7335 treated as the start of the message body. The misbehaviour could have
7336 caused a number of strange effects, including loss of data in subsequent
7337 header lines, and spool format errors.
7339 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7340 client host had authenticated. This control can now be exercised by an ACL
7341 for more flexibility.
7343 69. By default, callouts do not happen when testing with -bh. There is now a
7344 variant, -bhc, which does actually run the callout code, including
7345 consulting and updating the callout cache.
7347 70. Added support for saslauthd authentication, courtesy of Alexander
7350 71. If statvfs() failed on the spool or log directories while checking their
7351 size for availability, Exim confusingly gave the error "space shortage".
7352 Furthermore, in debugging mode it crashed with a floating point exception.
7353 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7354 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7355 serious problem, Exim now writes to the main and panic logs when this
7356 happens, with details of the failure. It then refuses to accept the
7357 incoming message, giving the message "spool directory problem" or "log
7358 directory problem" with a 421 code for SMTP messages.
7360 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7361 0, 1, and 2 exist, because some OS complain for execs without them (see
7362 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7363 descriptors. However, the code omitted to check that the open succeeded,
7364 causing mysterious errors if for some reason the permissions on /dev/null
7365 got screwed. Now Exim writes a message to the main and panic logs, and
7366 bombs out if it can't open /dev/null.
7368 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7369 interact so that it is all more flexible. It is supposed to remain
7370 backwards compatible. Also added extra_local_interfaces.
7372 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7373 to bomb out with an assertion failure - to the client this appears as a
7374 connection drop. This problem occurs in the part of the code that was taken
7375 from the Samba project. Fortunately, the assertion is in a very simple
7376 function, so I have fixed this by reproducing the function inline in the
7377 one place where it is called, and arranging for authentication to fail
7378 instead of killing the process with assert().
7380 75. The SPA client code was not working when the server requested OEM rather
7381 than Unicode encoding.
7383 76. Added code to make require_files with a specific uid setting more usable in
7384 the case where statting the file as root fails - usually a non-root-mounted
7385 NFS file system. When this happens and the failure is EACCES, Exim now
7386 forks a subprocess and does the per-uid checking as the relevant uid.
7388 77. Added process_log_path.
7390 78. If log_file_path was not explicitly set, a setting of check_log_space or
7391 check_log_inodes was ignored.
7393 79. If a space check for the spool or log partitions fails, the incident is now
7394 logged. Of course, in the latter case the data may get lost...
7396 80. Added the %p formatting code to string_format() so that it can be used to
7397 print addresses in debug_print(). Adjusted all the address printing in the
7398 debugging in store.c to use %p rather than %d.
7400 81. There was a concern that a line of code in smtp_in.c could overflow a
7401 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7402 initially expressed, the concern was not well-founded, because trailing
7403 spaces are removed early. However, if the trailing spaces were followed by
7404 a NULL, they did not get removed, so the overflow was possible. Two fixes
7407 (a) I re-wrote the offending code in a cleaner fashion.
7408 (b) If an incoming SMTP command contains a NULL character, it is rejected
7411 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7412 runs initgroups(), so that if the Exim user is in any additional groups,
7413 they will be used during message reception.
7419 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob