1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
12 side, to decode a TLS 1.3 packet capture.
14 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
15 Previously the default library behaviour applied, sending two, each in
18 JH/03 Debug output for ACL now gives the config file name and line number for
21 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
23 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
25 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
26 buffer overrun for (non-chunking) other transports.
28 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
29 TLS1.3, means that a server rejecting a client certificate is not visible
30 to the client until the first read of encrypted data (typically the
31 response to EHLO). Add detection for that case and treat it as a failed
32 TLS connection attempt, so that the normal retry-in-clear can work (if
35 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
36 and/or domain. Found and fixed by Jason Betts.
38 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
39 configuration). If a CNAME target was not a wellformed name pattern, a
42 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
43 the OS reports them interleaved with other addresses.
45 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
46 used both for input and for a verify callout, both encrypted, SMTP
47 responses being sent by the server could be lost. This resulted in
48 dropped connections and sometimes bounces generated by a peer sending
51 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
52 string. Previously it was possible to cause undefined behaviour in a
53 library routine (usually a crash). Found by "zerons".
55 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
58 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
59 API was removed, so update to use the newer ones.
61 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
62 any timeout set, is taking a long time. Previous we would hang on to a
63 rotated logfile "forever" if the input was arriving with long gaps
64 (a previous attempt to fix addressed lack, for a long time, of initial
71 JH/01 Remove code calling the customisable local_scan function, unless a new
72 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
74 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
75 non-signal-safe functions being used.
77 JH/03 Bug 2269: When presented with a received message having a stupidly large
78 number of DKIM-Signature headers, disable DKIM verification to avoid
79 a resource-consumption attack. The limit is set at twenty.
81 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
82 report of oldest_pass in ${authres } in consequence, and separate out
83 some descriptions of reasons for verification fail.
85 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
86 files in the spool were present and unlocked. A queue-runner could spot
87 them, resulting in a duplicate delivery. Fix that by doing the unlock
88 after the unlink. Investigation by Tim Stewart. Take the opportunity to
89 add more error-checking on spoolfile handling while that code is being
92 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
93 No known attacks, no CVE, this is defensive hardening.
95 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
96 a queue-runner could start a delivery while other operations were ongoing.
97 Cutthrough delivery was a common victim, resulting in duplicate delivery.
98 Found and investigated by Tim Stewart. Fix by using the open message data
99 file handle rather than opening another, and not locally closing it (which
100 releases a lock) for that case, while creating the temporary .eml format
101 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
103 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
104 $sender_verify_failure/$recipient_verify_failure to "random".
106 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
109 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
110 Previously this would segfault.
112 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
115 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
116 like zero, since the resolver should be doing this for us, But we need one
117 as a CNAME but no MX presence gets the CNAME returned; we need to check
118 that doesn't point to an MX to declare it "no MX returned" rather than
119 "error, loop". A new main option is added so the older capability of
120 following some limited number of chain links is maintained.
122 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
124 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
125 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
126 now-deprecated earlier definitions used only specified the range up to TLS
127 1.2 (in the older-version library docs).
129 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
131 JH/15 Rework TLS client-side context management. Stop using a global, and
132 explicitly pass a context around. This enables future use of TLS for
133 connections to service-daemons (eg. malware scanning) while a client smtp
134 connection is using TLS; with cutthrough connections this is quite likely.
136 JH/16 Fix ARC verification to do AS checks in reverse order.
138 JH/17 Support a "tls" option on the ${readsocket } expansion item.
140 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
141 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
142 Previously the "utf8" would be re-prepended for every additional message.
144 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
145 Previously thery were accepted, resulting in issues when attempting to
146 forward messages to a non-supporting MTA.
148 PP/02 Let -n work with printing macros too, not just options.
150 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
151 one parent address was copied, and bogus data was used at delivery-logging
152 time. Either a crash (after delivery) or bogus log data could result.
153 Discovery and analysis by Tim Stewart.
155 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
156 Previously if the string ended mid-character, we did not insert the
157 promised '?' replacement.
159 PP/04 Documentation: current string operators work on bytes, not codepoints.
161 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
162 should pack well giving a smaller memory footprint so better caching and
163 therefore performance. Group the declarations where this can't be done so
164 that the byte-sized flag variables are not interspersed among pointer
165 variables, giving a better chance of good packing by the compiler.
167 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
168 non-null, to avoid issues with sites running BATV. Previously reports were
169 sent with an empty envelope sender so looked like bounces.
171 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
172 The ignore_error flag wasn't being returned from the filter subprocess so
173 was not set for later routers. Investigation and fix by Matthias Kurz.
175 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
176 and a msg:complete for the whole, when a message is manually removed using
177 -Mrm. Developement by Matthias Kurz, hacked on by JH.
179 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
180 a "Gnu special" function, asprintf() in the DB utility binary builds; I
181 hope that is portable enough.
183 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
184 requiring a known-CA anchor certificate; make it now rely entirely on the
185 TLSA as an anchor. Checking the name on the leaf cert against the name
186 on the A-record for the host is still done for TA (but not for EE mode).
188 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
189 included in delivery lines for non-proxied connections, when compiled with
190 SUPPORT_SOCKS and running with proxy logging enabled.
192 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
193 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
194 move the existing event to fire before the normal logging of message
195 failure so that custom logging is bracketed by normal logging.
197 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
198 msg:fail:internal event. Developement by Matthias Kurz.
200 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
201 far too small for todays use of crypto signatures stored there. Go all
202 the way to the max DNS message size of 64kB, even though this might be
203 overmuch for IOT constrained device use.
205 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
206 copy a string over itself. The library routine is documented as not
207 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
209 JH/32 For main options check_spool_space and check_inode_space, where the
210 platform supports 64b integers, support more than the previous 2^31 kB
211 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
212 the previous G, M, k.
214 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
215 $authenticated_fail_id variable on authentication failure. Previously
218 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
219 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
220 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
221 GNUTLS_SEC_PARAM_MEDIUM.
223 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
224 side. Previously we would continue as if no SNI had been received.
226 JH/36 Harden the handling of string-lists. When a list consisted of a sole
227 "<" character, which should be a list-separator specification, we walked
228 off past the nul-terimation.
230 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
231 causes) even when the retry time is not yet met. Previously they were
232 not, meaning that when (say) an account was over-quota and temp-rejecting,
233 and multiple senders' messages were queued, only one sender would get
234 notified on each configured delay_warning cycle.
236 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
238 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
239 cipher-suites, an error can be left on the stack even for a succeeding
240 accept; this results in impossible error messages when a later operation
243 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
244 return error codes indicating retry. Under TLS1.3 this becomes required.
246 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
247 it only wrote the new authenticators, resulting in a lack of tracking of
248 peer changes of ESMTP extensions until the next cache flush.
250 JH/41 Fix the loop reading a message header line to check for integer overflow,
251 and more-often against header_maxsize. Previously a crafted message could
252 induce a crash of the recive process; now the message is cleanly rejected.
254 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
255 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
261 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
262 When redis_servers is set to a list of > 1 element, and the Redis servers
263 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
264 case of MOVED into a DEFER case instead, thus moving the query onto the
265 next server in the list. For a cluster of N elements, all N servers must
266 be defined in redis_servers.
268 GF/02 Catch and remove uninitialized value warning in exiqsumm
269 Check for existence of @ARGV before looking at $ARGV[0]
271 JH/01 Replace the store_release() internal interface with store_newblock(),
272 which internalises the check required to safely use the old one, plus
273 the allocate and data copy operations duplicated in both (!) of the
274 extant use locations.
276 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
277 modifier. This matches the restriction on the commandline.
279 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
280 Previously only the last row was returned.
282 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
283 we assumed that tags in the header were well-formed, and parsed the
284 element content after inspecting only the first char of the tag.
285 Assumptions at that stage could crash the receive process on malformed
288 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
289 While running the DKIM ACL we operate on the Permanent memory pool so that
290 variables created with "set" persist to the DATA ACL. Also (at any time)
291 DNS lookups that fail create cache records using the Permanent pool. But
292 expansions release any allocations made on the current pool - so a dnsdb
293 lookup expansion done in the DKIM ACL releases the memory used for the
294 DNS negative-cache, and bad things result. Solution is to switch to the
295 Main pool for expansions.
296 While we're in that code, add checks on the DNS cache during store_reset,
297 active in the testsuite.
298 Problem spotted, and debugging aided, by Wolfgang Breyha.
300 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
301 When none of the hosts presented to a transport match an already-open
302 connection, close it and proceed with the list. Previously we would
303 queue the message. Spotted by Lena with Yahoo, probably involving
306 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
307 Previously a spurious "250 OK id=" response was appended to the proper
310 JH/08 The "support for" informational output now, which built with Content
311 Scanning support, has a line for the malware scanner interfaces compiled
312 in. Interface can be individually included or not at build time.
314 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
315 by the template makefile "src/EDITME". The "STREAM" support for an older
316 ClamAV interface method is removed.
318 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
319 rows affected is given instead).
321 JH/11 The runtime Berkeley DB library version is now additionally output by
322 "exim -d -bV". Previously only the compile-time version was shown.
324 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
325 SMTP connection. Previously, when one had more receipients than the
326 first, an abortive onward connection was made. Move to full support for
327 multiple onward connections in sequence, handling cutthrough connection
328 for all multi-message initiating connections.
330 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
331 routers. Previously, a multi-recipient message would fail to match the
332 onward-connection opened for the first recipient, and cause its closure.
334 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
335 a timeout on read on a GnuTLS initiating connection, resulting in the
336 initiating connection being dropped. This mattered most when the callout
337 was marked defer_ok. Fix to keep the two timeout-detection methods
340 JH/15 Relax results from ACL control request to enable cutthrough, in
341 unsupported situations, from error to silently (except under debug)
342 ignoring. This covers use with PRDR, frozen messages, queue-only and
345 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
347 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
348 metadata, resulting in a crash in free().
350 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
351 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
352 Broken also in d185889f4, with init system revamp.
354 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
355 Previously we abruptly closed the connection after reading a malware-
356 found indication; now we go on to read the "scan ok" response line,
359 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
360 ACL. Previously, a crash would result.
362 JH/19 Speed up macro lookups during configuration file read, by skipping non-
363 macro text after a replacement (previously it was only once per line) and
364 by skipping builtin macros when searching for an uppercase lead character.
366 JH/20 DANE support moved from Experimental to mainline. The Makefile control
367 for the build is renamed.
369 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
370 was allocated for every new TLS startup, meaning one per message. Fix
371 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
373 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
374 reported the original. Fix to report (as far as possible) the ACL
375 result replacing the original.
377 JH/23 Fix memory leak during multi-message connections using STARTTLS under
378 OpenSSL. Certificate information is loaded for every new TLS startup,
379 and the resources needed to be freed.
381 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
383 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
386 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
387 DATA response info to the (existing) per-recipient response info for
388 the "C=" log element. It can have useful tracking info from the
389 destination system. Patch from Simon Arlott.
391 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
392 length value. Previously this would segfault.
394 HS/02 Support Avast multiline protoocol, this allows passing flags to
395 newer versions of the scanner.
397 JH/28 Ensure that variables possibly set during message acceptance are marked
398 dead before release of memory in the daemon loop. This stops complaints
399 about them when the debug_store option is enabled. Discovered specifically
400 for sender_rate_period, but applies to a whole set of variables.
401 Do the same for the queue-runner and queue-list loops, for variables set
402 from spool message files. Do the same for the SMTP per-message loop, for
403 certain variables indirectly set in ACL operations.
405 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
406 as a multi-recipient message from a mailinglist manager). The coding had
407 an arbitrary cutoff number of characters while checking for more input;
408 enforced by writing a NUL into the buffer. This corrupted long / fast
409 input. The problem was exposed more widely when more pipelineing of SMTP
410 responses was introduced, and one Exim system was feeding another.
411 The symptom is log complaints of SMTP syntax error (NUL chars) on the
412 receiving system, and refused recipients seen by the sending system
413 (propating to people being dropped from mailing lists).
414 Discovered and pinpointed by David Carter.
416 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
417 replaced by the ${authresults } expansion.
419 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
421 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
422 allows proper process termination in container environments.
424 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
425 Previously the "final dot" had a newline after it; ensure it is CR,LF.
427 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
428 and "err_perm", deprecated since 4.83 when the RFC-defined words
429 "temperror" and "permerror" were introduced.
431 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
432 transport-filters or DKIM-signing. The restriction was lost in the
433 consolidation of verify-callout and delivery SMTP handling.
434 Extend the restriction to also cover ARC-signing.
436 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
437 in defer=pass mode supply a 450 to the initiator. Previously the message
440 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
441 tls_require_ciphers is used as before.
443 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
444 "pass_unscanned". Only tmpfails from the scanner are written to
445 the paniclog, as they may require admin intervention (permission
446 denied, license issues). Other scanner errors (like decompression
447 bombs) do not cause a paniclog entry.
449 JH/36 Fix reinitialisation of DKIM logging variable between messages.
450 Previously it was possible to log spurious information in receive log
453 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
454 triggered odd behaviour from Outlook Express clients.
456 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
459 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
460 since the IETF WG has not yet settled on that versus the original
461 "bare" representation.
463 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
464 Previously the millisecond value corrupted the output.
465 Fix also for syslog_pid=no and log_selector +pid, for which the pid
466 corrupted the output.
472 JH/01 Rework error string handling in TLS interface so that the caller in
473 more cases is responsible for logging. This permits library-sourced
474 string to be attached to addresses during delivery, and collapses
475 pairs of long lines into single ones.
477 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
478 during configuration. Wildcards are allowed and expanded.
480 JH/02 Rework error string handling in DKIM to pass more info back to callers.
481 This permits better logging.
483 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
484 do not close it down and have the child transport start it up again on
485 the passed-on TCP connection. Instead, proxy the child (and any
486 subsequent ones) for TLS via a unix-domain socket channel. Logging is
487 affected: the continued delivery log lines do not have any DNSSEC, TLS
488 Certificate or OCSP information. TLS cipher information is still logged.
490 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
491 identical IP addresses on different listening ports. Will also affect
494 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
495 add noisy ifdef guards to special-case this sillyness.
496 Patch from Bernd Kuhls.
498 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
499 than 255 are no longer allowed.
501 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
502 Disable the session-cache too, which might reduce our load. Since we
503 currrectly use a new context for every connection, both as server and
504 client, there is no benefit for these.
505 GnuTLS appears to not support tickets server-side by default (we don't
506 call gnutls_session_ticket_enable_server()) but client side is enabled
507 by default on recent versions (3.1.3 +) unless the PFS priority string
510 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
511 <https://reproducible-builds.org/specs/source-date-epoch/>.
513 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
514 the check for any unsuccessful recipients did not notice the limit, and
515 erroneously found still-pending ones.
517 JH/08 Pipeline CHUNKING command and data together, on kernels that support
518 MSG_MORE. Only in-clear (not on TLS connections).
520 JH/09 Avoid using a temporary file during transport using dkim. Unless a
521 transport-filter is involved we can buffer the headers in memory for
522 creating the signature, and read the spool data file once for the
523 signature and again for transmission.
525 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
526 4.77 as the kernel support then wasn't solid, having issues in 64bit
527 mode. Now, it's been long enough. Add support for FreeBSD also.
529 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
530 case where the routing stage had gathered several addresses to send to
531 a host before calling the transport for the first, we previously failed
532 to close down TLS in the old transport process before passing the TCP
533 connection to the new process. The new one sent a STARTTLS command
534 which naturally failed, giving a failed delivery and bloating the retry
535 database. Investigation and fix prototype from Wolfgang Breyha.
537 JH/12 Fix check on SMTP command input synchronisation. Previously there were
538 false-negatives in the check that the sender had not preempted a response
539 or prompt from Exim (running as a server), due to that code's lack of
540 awareness of the SMTP input buffering.
542 PP/04 Add commandline_checks_require_admin option.
543 Exim drops privileges sanely, various checks such as -be aren't a
544 security problem, as long as you trust local users with access to their
545 own account. When invoked by services which pass untrusted data to
546 Exim, this might be an issue. Set this option in main configuration
547 AND make fixes to the calling application, such as using `--` to stop
550 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
551 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
552 responses to those, into a single TLS record each way (this usually means
553 a single packet). As a side issue, smtp_enforce_sync now works on TLS
556 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
557 affects you only if you're dancing at the edge of the param size limits.
558 If you are, and this message makes sense to you, then: raise the
559 configured limit or use OpenSSL 1.1. Nothing we can do for older
562 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
563 cmdline element to get the documented default one. Previously it was
566 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
567 are unsuable for non-message-specific reasons - eg. connection timeout,
568 banner-time rejection.
570 JH/16 Fix logging of delivery remote port, when specified by router, under
573 PP/06 Repair manualroute's ability to take options in any order, even if one
574 is the name of a transport.
577 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
579 JH/17 Change the list-building routines interface to use the expanding-string
580 triplet model, for better allocation and copying behaviour.
582 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
583 Previously it was constructed the first time a possibly-matching string
584 was met in the configuration file input during startup; now it is done
587 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
588 compatible one, to avoid the (poorly documented) possibility of a config
589 file in the working directory redirecting the DB files, possibly correpting
590 some existing file. CVE-2017-10140 assigned for BDB.
592 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
593 cache-hot. Previously, although the result was properly cached, the
594 initial verify call returned a defer.
596 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
597 the main verify for receipient in uncached-mode.
599 JH/22 Retire historical build files to an "unsupported" subdir. These are
600 defined as "ones for which we have no current evidence of testing".
602 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
603 if present. Previously it was ignored.
605 JH/24 Start using specified-initialisers in C structure init coding. This is
606 a C99 feature (it's 2017, so now considered safe).
608 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
609 if was a fixed-sized field and bitmask ops via macros; it is now more
612 PP/07 GitHub PR 56: Apply MariaDB build fix.
613 Patch provided by Jaroslav Škarvada.
615 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
616 during Coverity cleanups [4.87 JH/47]
617 Diagnosis and fix provided by Michael Fischer v. Mollard.
619 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
620 the right size to place the terminating semicolon on its own folded
621 line, the header hash was calculated to an incorrect value thanks to
622 the (relaxed) space the fold became.
624 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
625 and confused the parent.
627 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
628 which could crash as a result. This could lead to undeliverable messages.
630 JH/28 Logging: "next input sent too soon" now shows where input was truncated
633 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
634 matters on fast-turnover and PID-randomising systems, which were getting
635 out-of-order delivery.
637 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
638 a possibly-overlapping copy. The symptom was that "Remote host closed
639 connection in response to HELO" was logged instead of the actual 4xx
642 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
643 Previously only that bufferd was discarded, resulting in SYMTP command
646 JH/32 DKIM: when a message has multiple signatures matching an identity given
647 in dkim_verify_signers, run the dkim acl once for each. Previously only
648 one run was done. Bug 2189.
650 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
651 "panic the current process" to "deliberately defer". The panic log is
652 still written with the problem list name; the mail and reject logs now
653 get a temp-reject line for the message that was being handled, saying
654 something like "domains check lookup or other defer". The SMTP 451
655 message is still "Temporary local problem".
657 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
658 A crafted sequence of BDAT commands could result in in-use memory beeing
659 freed. CVE-2017-16943.
661 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
662 from SMTP input. Previously it was always done; now only done for DATA
663 and not BDAT commands. CVE-2017-16944.
665 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
666 to the message (such as an overlong header line). Previously this was
667 not done and we did not exit BDAT mode. Followon from the previous item
668 though a different problem.
674 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
675 than -2003 did; needs libidn2 in addition to libidn.
677 JH/02 The path option on a pipe transport is now expanded before use.
679 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
680 Patch provided by "Björn", documentation fix added too.
682 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
683 missing a wire-to-host endian conversion.
685 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
686 close after a BDAT command line could be taken as a following command,
687 giving a synch failure. Fix by only checking for synch immediately
688 before acknowledging the chunk.
690 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
691 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
692 macro. Patches provided by Josh Soref.
694 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
695 Previously we did not; the RFC seems ambiguous and VRFY is not listed
696 by IANA as a service extension. However, John Klensin suggests that we
699 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
700 the dkim code may be unix-mode line endings rather than smtp wire-format
701 CRLF, so prepend a CR to any bare LF.
703 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
704 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
706 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
707 the first were themselves being wrongly included in the feed into dkim
708 processing; with most chunk sizes in use this resulted in an incorrect
709 body hash calculated value.
711 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
712 DKIM signature block, for verification. Although advised against by
713 standards it is specifically not ruled illegal.
715 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
717 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
718 missing a body hash (the bh= tag).
720 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
721 It seems that HAProxy sends the Proxy Protocol information in clear and
722 only then does a TLS startup, so do the same.
724 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
725 TCP connections (such as for Spamd) unless the daemon successfully set
726 Fast Open mode on its listening sockets. This fixes breakage seen on
727 too-old kernels or those not configured for Fast Open, at the cost of
728 requiring both directions being enabled for TFO, and TFO never being used
729 by non-daemon-related Exim processes.
731 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
732 endings, at least on the first header line. Try to canonify any that get
733 past that check, despite the cost.
735 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
736 now limited to an arbitrary five deep, while parsing addresses with the
737 strip_excess_angle_brackets option enabled.
739 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
740 instead leave the unprompted TLS handshake in socket buffer for the
741 TLS library to consume.
743 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
745 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
747 JH/16 Drop variables when they go out of scope. Memory management drops a whole
748 region in one operation, for speed, and this leaves assigned pointers
749 dangling. Add checks run only under the testsuite which checks all
750 variables at a store-reset and panics on a dangling pointer; add code
751 explicitly nulling out all the variables discovered. Fixes one known
752 bug: a transport crash, where a dangling pointer for $sending_ip_address
753 originally assigned in a verify callout, is re-used.
755 PP/06 Drop '.' from @INC in various Perl scripts.
757 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
759 PP/08 Reduce a number of compilation warnings under clang; building with
760 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
761 should be warning-free.
763 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
765 HS/01 Fix portability problems introduced by PP/08 for platforms where
766 realloc(NULL) is not equivalent to malloc() [SunOS et al].
768 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
769 chunk. This allows us to accept broken chunked messages. We need a more
770 general solution here.
772 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
773 already-broken messages in the queue.
775 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
777 JH/19 Fix reference counting bug in routing-generated-address tracking.
783 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
784 supports it and a size is available (ie. the sending peer gave us one).
786 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
787 years of being deprecated). The replacements are the ACLs
788 acl_smtp_mime and acl_not_smtp_mime.
790 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
791 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
792 or even an in-clear connection were permitted. Now, if the host lookup
793 was dnssec and dane was requested then the host is only used if the
794 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
795 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
796 if one fails this test.
797 This means that a poorly-configured remote DNS will make it incommunicado;
798 but it protects against a DNS-interception attack on it.
800 JH/04 Bug 1810: make continued-use of an open smtp transport connection
801 non-noisy when a race steals the message being considered.
803 JH/05 If main configuration option tls_certificate is unset, generate a
804 self-signed certificate for inbound TLS connections.
806 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
807 in rewrites and routers.
809 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
810 and logged a warning sing 4.83; now they are a configuration file error.
812 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
813 (lacking @domain). Apply the same qualification processing as RCPT.
815 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
817 JH/10 Support ${sha256:} applied to a string (as well as the previous
820 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
821 a cutthrough deliver is pending, as we always want to make a connection.
822 This also avoids re-routing the message when later placing the cutthrough
823 connection after a verify cache hit.
824 Do not update it with the verify result either.
826 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
827 when routing results in more than one destination address.
829 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
830 signing (which inhibits the cutthrough capability). Previously only
831 the presence of an option was tested; now an expansion evaluating as
832 empty is permissible (obviously it should depend only on data available
833 when the cutthrough connection is made).
835 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
836 the relevant preceding SMTP command did not note the pipelining mode.
838 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
839 Previously they were not counted.
841 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
842 as one having no matching records. Previously we deferred the message
843 that needed the lookup.
845 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
846 distinguished as "(=".
848 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
849 for missing MX records. Previously it only worked for missing A records.
851 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
853 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
854 after the data-go-ahead and data-ack. Patch from Jason Betts.
856 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
857 even for a "none" policy. Patch from Tony Meyer.
859 JH/22 Fix continued use of a connection for further deliveries. If a port was
860 specified by a router, it must also match for the delivery to be
863 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
864 When one of the recipients of a message was unsuitable for the connection
865 (has no matching addresses), we lost track of needing to mark it
866 deferred. As a result mail would be lost.
868 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
870 JH/25 Decoding ACL controls is now done using a binary search; the source code
871 takes up less space and should be simpler to maintain. Merge the ACL
872 condition decode tables also, with similar effect.
874 JH/26 Fix problem with one_time used on a redirect router which returned the
875 parent address unchanged. A retry would see the parent address marked as
876 delivered, so not attempt the (identical) child. As a result mail would
879 JH/27 Fix a possible security hole, wherein a process operating with the Exim
880 UID can gain a root shell. Credit to http://www.halfdog.net/ for
881 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
884 JH/28 Enable {spool,log} filesystem space and inode checks as default.
885 Main config options check_{log,spool}_{inodes,space} are now
886 100 inodes, 10MB unless set otherwise in the configuration.
888 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
889 Previously it only applied to the main-section connection policy
892 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
894 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
895 by me. Added RFC7919 DH primes as an alternative.
897 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
898 are not in the system include path.
900 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
901 GnuTLS, when a session startup failed (eg because the client disconnected)
902 Exim did stdio operations after fclose. This was exposed by a recent
903 change which nulled out the file handle after the fclose.
905 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
906 signed directly by the cert-signing cert, rather than an intermediate
907 OCSP-signing cert. This is the model used by LetsEncrypt.
909 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
911 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
912 an incoming connection.
914 HS/02 Bug 1802: Do not half-close the connection after sending a request
917 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
918 fallback to "prime256v1".
920 JH/34 SECURITY: Use proper copy of DATA command in error message.
921 Could leak key material. Remotely exploitable. CVE-2016-9963.
927 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
928 and 3.4.4 - once the server is enabled to respond to an OCSP request
929 it does even when not requested, resulting in a stapling non-aware
930 client dropping the TLS connection.
932 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
933 support variable-length bit vectors. No functional change.
935 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
936 The I= interface field on outgoing lines is now after the H= remote
937 host field, same as incoming lines. There is a separate
938 outgoing_interface log selector which allows you to disable the
941 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
942 If not running log_selector +smtp_connection the mainlog would be held
943 open indefinitely after a "too many connections" event, including to a
944 deleted file after a log rotate. Leave the per net connection logging
945 leaving it open for efficiency as that will be quickly detected by the
946 check on the next write.
948 HS/01 Bug 1671: Fix post transport crash.
949 Processing the wait-<transport> messages could crash the delivery
950 process if the message IDs didn't exist for some reason. When
951 using 'split_spool_directory=yes' the construction of the spool
952 file name failed already, exposing the same netto behaviour.
954 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
955 mime_regex ACL conditions.
957 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
958 to DSN fail messages (bounces): remote IP, remote greeting, remote response
959 to HELO, local diagnostic string.
961 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
962 log line to debug. Even when configured with a tls authenticator many
963 client connections are expected to not authenticate in this way, so
964 an authenticate fail is not an error.
966 HS/02 Add the Exim version string to the process info. This way exiwhat
967 gives some more detail about the running daemon.
969 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
970 matter for fast-change records such as DNSBLs.
972 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
973 retry record, even if constant. There may be multiple transports with
974 different interface settings and the retry behaviour needs to be kept
977 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
979 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
981 JH/10 Bug 840: fix log_defer_output option of pipe transport
983 JH/11 Bug 830: use same host for all RCPTS of a message, even under
984 hosts_randomize. This matters a lot when combined with mua_wrapper.
986 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
987 ${quote_pgsql:<string>} operator.
989 JH/13 Bug 1708: avoid misaligned access in cached lookup.
991 JH/14 Change header file name for freeradius-client. Relevant if compiling
992 with Radius support; from the Gentoo tree and checked under Fedora.
994 JH/15 Bug 1712: Introduce $prdr_requested flag variable
996 JH/16 Bug 1714: Permit an empty string as expansion result for transport
997 option transport_filter, meaning no filtering.
999 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1001 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1002 defaults to "*" (all hosts). The variable is now available when not built
1003 with TLS, default unset, mainly to enable keeping the testsuite sane.
1004 If a server certificate is not supplied (via tls_certificate) an error is
1005 logged, and clients will find TLS connections fail on startup. Presumably
1006 they will retry in-clear.
1007 Packagers of Exim are strongly encouraged to create a server certificate
1008 at installation time.
1010 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1011 with the $config_file variable.
1013 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1014 in transport context, after the attempt, and per-recipient. The latter type
1015 is per host attempted. The event data is the error message, and the errno
1016 information encodes the lookup type (A vs. MX) used for the (first) host,
1017 and the trailing two digits of the smtp 4xx response.
1019 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1020 to write to mainlog (or rejectlog, paniclog) in the window between file
1021 creation and permissions/ownership being changed. Particularly affects
1022 installations where exicyclog is run as root, rather than exim user;
1023 result is that the running daemon panics and dies.
1025 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1027 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1028 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1029 "pri" and "weight". Note that the previous implicit priority given by the
1030 list order is no longer honoured.
1032 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1033 for DKIM processing.
1035 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1036 by defining SUPPORT_SOCKS.
1038 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1039 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1040 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1041 variables are renamed to proxy_{local,external}_{address,port}.
1043 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1044 for a build by defining SUPPORT_I18N
1046 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1047 of the query string, and make ${quote_redis:} do that quoting.
1049 JH/29 Move Events support from Experimental to mainline, enabled by default
1050 and removable for a build by defining DISABLE_EVENT.
1052 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1054 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1055 cached by the daemon.
1057 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1058 by defining LOOKUP_REDIS. The libhiredis library is required.
1060 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1061 keys are given for lookup.
1063 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1064 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1065 only supported when built with TLS support. The PolarSSL SHA routines
1066 are still used when the TLS library is too old for convenient support.
1068 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1069 openssl_options), for security. OpenSSL forces this from version 1.1.0
1070 server-side so match that on older versions.
1072 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1073 allocation for $value could be released as the expansion processing
1074 concluded, but leaving the global pointer active for it.
1076 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1077 and to use the domains and local_parts ACL conditions.
1079 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1080 incorrectly not doubled on cutthrough transmission, hence seen as a
1081 body-termination at the receiving system - resulting in truncated mails.
1082 Commonly the sender saw a TCP-level error, and retransmitted the message
1083 via the normal store-and-forward channel. This could result in duplicates
1084 received - but deduplicating mailstores were liable to retain only the
1085 initial truncated version.
1087 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1089 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1091 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1092 we're in there, support oversigning also; bug 1309.
1094 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1096 HS/04 Add support for keep_environment and add_environment options.
1098 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1099 either intentional arithmetic overflow during PRNG, or testing config-
1102 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1103 delivery resulted in actual delivery. Cancel cutthrough before DATA
1106 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1107 rejects a recipient: pass the reject to the originator.
1109 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1110 Many were false-positives and ignorable, but it's worth fixing the
1113 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1114 for the new environment-manipulation done at startup. Move the routines
1115 from being local to tls.c to being global via the os.c file.
1117 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1118 an extract embedded as result-arg for a map, the first arg for extract
1119 is unavailable so we cannot tell if this is a numbered or keyed
1120 extraction. Accept either.
1126 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1129 JH/02 The smtp transport option "multi_domain" is now expanded.
1131 JH/03 The smtp transport now requests PRDR by default, if the server offers
1134 JH/04 Certificate name checking on server certificates, when exim is a client,
1135 is now done by default. The transport option tls_verify_cert_hostnames
1136 can be used to disable this per-host. The build option
1137 EXPERIMENTAL_CERTNAMES is withdrawn.
1139 JH/05 The value of the tls_verify_certificates smtp transport and main options
1140 default to the word "system" to access the system default CA bundle.
1141 For GnuTLS, only version 3.0.20 or later.
1143 JH/06 Verification of the server certificate for a TLS connection is now tried
1144 (but not required) by default. The verification status is now logged by
1145 default, for both outbound TLS and client-certificate supplying inbound
1148 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1151 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1152 Status Notification (bounce) messages are now MIME format per RFC 3464.
1153 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1154 under the control of the dsn_advertise_hosts option, and routers may
1155 have a dsn_lasthop option.
1157 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1158 default, modifiable by a malware= option. The list separator for
1159 the options can now be changed in the usual way. Bug 68.
1161 JH/10 The smtp_receive_timeout main option is now expanded before use.
1163 JH/11 The incoming_interface log option now also enables logging of the
1164 local interface on delivery outgoing connections.
1166 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1167 if the interface and destination host and port all match.
1169 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1172 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1173 Patch from Andrew Lewis.
1175 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1176 now supports optional time-restrictions, weighting, and priority
1177 modifiers per server. Patch originally by <rommer@active.by>.
1179 JH/16 The spamd_address main option now supports a mixed list of local
1180 and remote servers. Remote servers can be IPv6 addresses, and
1181 specify a port-range.
1183 JH/17 Bug 68: The spamd_address main option now supports an optional
1184 timeout value per server.
1186 JH/18 Bug 1581: Router and transport options headers_add/remove can
1187 now have the list separator specified.
1189 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1192 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1195 JH/21 Support for the A6 type of dns record is withdrawn.
1197 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1198 rather than the verbs used.
1200 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1201 from 255 to 1024 chars.
1203 JH/24 Verification callouts now attempt to use TLS by default.
1205 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1206 are generic router options now. The defaults didn't change.
1208 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1209 Original patch from Alexander Shikoff, worked over by JH.
1211 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1212 files if ZCAT_COMMAND is not executable.
1214 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1216 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1218 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1219 Normally benign, it bites when the pair was led to by a CNAME;
1220 modern usage is to not canonicalize the domain to a CNAME target
1221 (and we were inconsistent anyway for A-only vs AAAA+A).
1223 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1225 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1226 when evaluating $sender_host_dnssec.
1228 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1229 $sender_helo_dnssec variable.
1231 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1233 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1235 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1237 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1238 documented as working, but never had. Support all but $spam_report.
1240 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1241 added for tls authenticator.
1243 HS/03 Add perl_taintmode main config option
1249 TL/01 When running the test suite, the README says that variables such as
1250 no_msglog_check are global and can be placed anywhere in a specific
1251 test's script, however it was observed that placement needed to be near
1252 the beginning for it to behave that way. Changed the runtest perl
1253 script to read through the entire script once to detect and set these
1254 variables, reset to the beginning of the script, and then run through
1255 the script parsing/test process like normal.
1257 TL/02 The BSD's have an arc4random API. One of the functions to induce
1258 adding randomness was arc4random_stir(), but it has been removed in
1259 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1260 function when detected.
1262 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1263 cause callback expansion.
1265 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1266 syntax errors in an expansion can be treated as a string instead of
1267 logging or causing an error, due to the internal use of bool_lax
1268 instead of bool when processing it.
1270 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1271 server certificates when making smtp deliveries.
1273 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1275 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1277 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1279 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1280 Merged patch from Sebastian Wiedenroth.
1282 JH/05 Fix results-pipe from transport process. Several recipients, combined
1283 with certificate use, exposed issues where response data items split
1284 over buffer boundaries were not parsed properly. This eventually
1285 resulted in duplicates being sent. This issue only became common enough
1286 to notice due to the introduction of connection certificate information,
1287 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1289 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1290 size buffer was used, resulting in syntax errors when an expansion
1293 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1294 version 3.3.6 or later.
1296 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1297 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1298 both become "event_action", the variables become $event_name, $event_data
1299 and $event_defer_errno. There is a new variable $verify_mode, usable in
1300 routers, transports and related events. The tls:cert event is now also
1301 raised for inbound connections, if the main configuration event_action
1304 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1305 early OCSP support, but no stapling (appears to be less than 1.0.0).
1307 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1308 server certificate names available under the smtp transport option
1309 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1312 JH/10 Time-related extraction expansions from certificates now use the main
1313 option "timezone" setting for output formatting, and are consistent
1314 between OpenSSL and GnuTLS compilations. Bug 1541.
1316 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1317 encoded parameter in the incoming message. Bug 1558.
1319 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1320 include certificate info, eximon was claiming there were spoolfile
1323 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1325 JH/14 Log delivery-related information more consistently, using the sequence
1326 "H=<name> [<ip>]" wherever possible.
1328 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1329 are problematic for Debian distribution, omit them from the release
1332 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1334 JH/16 Fix string representation of time values on 64bit time_t architectures.
1337 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1338 output list separator was used.
1343 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1344 checkers that were complaining about end of non-void function with no
1347 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1348 This was a regression introduced in 4.83 by another bugfix.
1350 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1352 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1353 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1359 TF/01 Correctly close the server side of TLS when forking for delivery.
1361 When a message was received over SMTP with TLS, Exim failed to clear up
1362 the incoming connection properly after forking off the child process to
1363 deliver the message. In some situations the subsequent outgoing
1364 delivery connection happened to have the same fd number as the incoming
1365 connection previously had. Exim would try to use TLS and fail, logging
1366 a "Bad file descriptor" error.
1368 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1369 utilities have not been installed.
1371 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1372 temporary space as the ACL may create new global variables.
1374 TL/01 LDAP support uses per connection or global context settings, depending
1375 upon the detected version of the libraries at build time.
1377 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1378 to extract and use the src ip:port in logging and expansions as if it
1379 were a direct connection from the outside internet. PPv2 support was
1380 updated based on HAProxy spec change in May 2014.
1382 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1384 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1385 Properly escape header and check for NULL return.
1387 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1390 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1392 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1393 characters in header names, implemented as a verify condition.
1394 Contributed by Michael Fischer v. Mollard.
1396 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1397 results permerror and temperror. Previous values are deprecated but
1398 still accepted. In a future release, err_perm and err_temp will be
1399 completely removed, which will be a backward incompatibility if the
1400 ACL tests for either of these two old results. Patch contributed by
1401 user bes-internal on the mailing list.
1403 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1405 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1406 selectors, in both main and reject logs.
1408 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1411 JH/07 Add malware type "sock" for talking to simple daemon.
1413 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1415 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1416 routers/transports under cutthrough routing.
1418 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1419 numbers. Touch up "bool" conditional to keep the same definition.
1421 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1423 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1425 JH/12 Expand items in router/transport headers_add or headers_remove lists
1426 individually rather than the list as a whole. Bug 1452.
1428 Required for reasonable handling of multiple headers_ options when
1429 they may be empty; requires that headers_remove items with embedded
1430 colons must have them doubled (or the list-separator changed).
1432 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1433 view the policy declared in the DMARC record. Currently, $dmarc_status
1434 is a combined value of both the record presence and the result of the
1437 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1439 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1440 dnslookup router and the smtp transport (applying to the forward
1443 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1444 of ldap servers used for a specific lookup. Patch provided by Heiko
1447 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1448 New variable $lookup_dnssec_authenticated for observability.
1450 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1451 Patch submitted by Lars Timman.
1453 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1455 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1456 Requires trusted mode and valid format message id, aborts otherwise.
1457 Patch contributed by Heiko Schlichting.
1459 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1460 certextract with support for various fields. Bug 1358.
1462 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1463 is requested by default, modifiable by smtp transport option
1466 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1467 operate on certificate variables to give certificate fingerprints
1468 Also new ${sha256:cert_variable}.
1470 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1472 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1473 Christian Aistleitner.
1475 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1477 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1478 file. Patch from Wolfgang Breyha.
1480 JH/25 Expand the coverage of the delivery $host and $host_address to
1481 client authenticators run in verify callout. Bug 1476.
1483 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1484 align with daemon_smtp_ports. Bug 72.
1486 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1487 support and error reporting did not work properly.
1489 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1490 and is readable. Patch from Andrew Colin Kissa.
1492 TL/14 Enhance documentation of ${run expansion and how it parses the
1493 commandline after expansion, particularly in the case when an
1494 unquoted variable expansion results in an empty value.
1496 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1498 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1499 by renaming away from it. Addresses GH issue 15, reported by
1502 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1504 TL/15 SECURITY: prevent double expansion in math comparison functions
1505 (can expand unsanitized data). Not remotely exploitable.
1512 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1514 PP/02 Make -n do something, by making it not do something.
1515 When combined with -bP, the name of an option is not output.
1517 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1520 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1521 $sender_host_name and config options to manage this, and basic check
1524 PP/05 DSCP support for outbound connections and control modifier for inbound.
1526 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1527 (Only plugin which currently uses this is kerberos4, which nobody should
1528 be using, but we should make it available and other future plugins might
1529 conceivably use it, even though it would break NAT; stuff *should* be
1530 using channel bindings instead).
1532 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1533 name; added for Sendmail compatibility; requires admin caller.
1534 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1535 just ignore it); requires trusted caller.
1536 Also parse but ignore: -Ac -Am -X<logfile>
1539 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1541 TL/02 Add +smtp_confirmation as a default logging option.
1543 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1544 Patch by Magnus Holmgren from 2007-02-20.
1546 TL/04 Bugzilla 1281 - Spec typo.
1547 Bugzilla 1283 - Spec typo.
1548 Bugzilla 1290 - Spec grammar fixes.
1550 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1552 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1554 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1555 mailing list by by Dmitry Isaikin.
1557 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1559 JH/02 Support "G" suffix to numbers in ${if comparisons.
1561 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1563 NM/01 Bugzilla 1197 - Spec typo
1564 Bugzilla 1196 - Spec examples corrections
1566 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1568 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1569 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1572 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1573 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1575 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1576 "acl {{name}{arg}...}", and optional args on acl condition
1579 JH/05 Permit multiple router/transport headers_add/remove lines.
1581 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1583 JH/07 Avoid using a waiting database for a single-message-only transport.
1584 Performance patch from Paul Fisher. Bugzilla 1262.
1586 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1589 JH/09 Add $headers_added variable, with content from use of ACL modifier
1590 add_header (but not yet added to the message). Bugzilla 199.
1592 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1593 Pulled from Bugzilla 817 by Wolfgang Breyha.
1595 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1597 (nb: this is the same fix as in Exim 4.80.1)
1599 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1602 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1605 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1607 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1608 advertise SMTP AUTH mechanism to us, instead of a generic
1609 protocol violation error. Also, make Exim more robust to bad
1610 data from the Dovecot auth socket.
1612 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1614 When a queue runner is handling a message, Exim first routes the
1615 recipient addresses, during which it prunes them based on the retry
1616 hints database. After that it attempts to deliver the message to
1617 any remaining recipients. It then updates the hints database using
1620 So if a recipient address works intermittently, it can get repeatedly
1621 deferred at routing time. The retry hints record remains fresh so the
1622 address never reaches the final cutoff time.
1624 This is a fairly common occurrence when a user is bumping up against
1625 their storage quota. Exim had some logic in its local delivery code
1626 to deal with this. However it did not apply to per-recipient defers
1627 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1629 This change adds a proper retry rule check during routing so that the
1630 final cutoff time is checked against the message's age. We only do
1631 this check if there is an address retry record and there is not a
1632 domain retry record; this implies that previous attempts to handle
1633 the address had the retry_use_local_parts option turned on. We use
1634 this as an approximation for the destination being like a local
1635 delivery, as in LMTP.
1637 I suspect this new check makes the old local delivery cutoff check
1638 redundant, but I have not verified this so I left the code in place.
1640 TF/02 Correct gecos expansion when From: is a prefix of the username.
1642 Test 0254 submits a message to Exim with the header
1646 When I ran the test suite under the user fanf2, Exim expanded
1647 the header to contain my full name, whereas it should have added
1648 a Resent-Sender: header. It erroneously treats any prefix of the
1649 username as equal to the username.
1651 This change corrects that bug.
1653 GF/01 DCC debug and logging tidyup
1654 Error conditions log to paniclog rather than rejectlog.
1655 Debug lines prefixed by "DCC: " to remove any ambiguity.
1657 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1659 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1660 Bug spotted by Jeremy Harris; was flawed since initial commit.
1661 Would have resulted in OCSP responses post-SNI triggering an Exim
1662 NULL dereference and crash.
1664 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1666 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1667 Bug detection, analysis and fix by Samuel Thibault.
1668 Bugzilla 1331, Debian bug #698092.
1670 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1672 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1673 Server implementation by Todd Lyons, client by JH.
1674 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1675 config variable "prdr_enable" controls whether the server
1676 advertises the facility. If the client requests PRDR a new
1677 acl_data_smtp_prdr ACL is called once for each recipient, after
1678 the body content is received and before the acl_smtp_data ACL.
1679 The client is controlled by both of: a hosts_try_prdr option
1680 on the smtp transport, and the server advertisement.
1681 Default client logging of deliveries and rejections involving
1682 PRDR are flagged with the string "PRDR".
1684 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1685 fclose(). Diagnosis by Todd Lyons.
1687 PP/17 Update configure.default to handle IPv6 localhost better.
1688 Patch by Alain Williams (plus minor tweaks).
1691 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1692 This is now consistent with GnuTLS, and is now documented: the
1693 previous undocumented portable approach to treating the option as
1694 unset was to force an expansion failure. That still works, and
1695 an empty string is now equivalent.
1697 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1698 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1699 not performing validation itself.
1701 PP/20 Added force_command boolean option to pipe transport.
1702 Patch from Nick Koston, of cPanel Inc.
1704 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1707 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1709 PP/21 Fix eximon continuous updating with timestamped log-files.
1710 Broken in a format-string cleanup in 4.80, missed when I repaired the
1711 other false fix of the same issue.
1712 Report and fix from Heiko Schlichting.
1715 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1716 Report from Prashanth Katuri.
1718 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1719 It's SecureTransport, so affects any MacOS clients which use the
1720 system-integrated TLS libraries, including email clients.
1722 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1723 using a MIME ACL for non-SMTP local injection.
1724 Report and assistance in diagnosis by Warren Baker.
1726 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1728 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1730 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1731 last id that failed so it may be referenced in subsequent ACL's.
1733 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1736 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1737 ldap library initialization, allowing self-signed CA's to be
1738 used. Also properly sets require_cert option later in code by
1739 using NULL (global ldap config) instead of ldap handle (per
1740 session). Bug diagnosis and testing by alxgomz.
1742 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1743 the src/util/ subdirectory.
1745 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1746 renamed to Transport Post Delivery Action by Jeremy Harris, as
1749 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1750 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1751 redis_servers = needs to be configured which will be used by the redis
1752 lookup. Patch from Warren Baker, of The Packet Hub.
1754 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1756 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1757 hostname or reverse DNS when processing a host list. Used suggestions
1758 from multiple comments on this bug.
1760 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1762 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1763 Missed a few lines, added it to make the runtest require no keyboard
1766 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1767 contains upper case chars. Make router use caseful_local_part.
1769 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1770 support when GnuTLS has been built with p11-kit.
1776 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1778 This, or similar/improved, will also be change PP/11 of 4.82.
1784 PP/01 Handle short writes when writing local log-files.
1785 In practice, only affects FreeBSD (8 onwards).
1786 Bugzilla 1053, with thanks to Dmitry Isaikin.
1788 NM/01 Bugzilla 949 - Documentation tweak
1790 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1793 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1795 PP/02 Implemented gsasl authenticator.
1797 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1799 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1800 `pkg-config foo` for cflags/libs.
1802 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1803 with rest of GSASL and with heimdal_gssapi.
1805 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1806 `pkg-config foo` for cflags/libs for the TLS implementation.
1808 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1809 properties get this fed in as external SSF. A number of robustness
1810 and debugging improvements to the cyrus_sasl authenticator.
1812 PP/08 cyrus_sasl server now expands the server_realm option.
1814 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1815 Patch by Jeremy Harris.
1817 PP/10 Added dbmjz lookup type.
1819 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1821 PP/12 MAIL args handles TAB as well as SP, for better interop with
1822 non-compliant senders.
1823 Analysis and variant patch by Todd Lyons.
1825 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1826 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1827 Patch from Dirk Mueller <dmueller@suse.com>
1829 PP/13 tls_peerdn now print-escaped for spool files.
1830 Observed some $tls_peerdn in wild which contained \n, which resulted
1831 in spool file corruption.
1833 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1834 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1835 or write after TLS renegotiation, which otherwise led to messages
1838 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1839 as a tracking header (ie: a signed header comes before the signature).
1840 Patch from Wolfgang Breyha.
1842 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1843 comma-sep list; embedded commas doubled.
1845 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1847 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1849 Report and patch from Dmitry Banschikov.
1851 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1852 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1853 failures. We appear to now support TLS1.1+ with Exim.
1855 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1856 lets Exim select keys and certificates based upon TLS SNI from client.
1857 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1858 before an outbound SMTP session. New log_selector, +tls_sni.
1860 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1861 NULL dereference. Report and patch from Alun Jones.
1863 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1864 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1865 Not seeing resolver debug output on NetBSD, but suspect this is a
1866 resolver implementation change.
1868 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1869 Left warnings. Added "eximon gdb" invocation mode.
1871 PP/21 Defaulting "accept_8bitmime" to true, not false.
1873 PP/22 Added -bw for inetd wait mode support.
1875 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1876 locate the relevant includes and libraries. Made this the default.
1878 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1879 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1881 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1882 This may cause build issues on older platforms.
1884 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1885 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1886 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1887 Added SNI support via GnuTLS too.
1888 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1890 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1892 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1893 Applied second patch from Janne, implementing suggestion to default
1894 multiple-strings-in-record handling to match SPF spec.
1896 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1898 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1899 read-only, out of scope).
1900 Patch from Wolfgang Breyha, report from Stuart Northfield.
1902 PP/29 Fix three issues highlighted by clang analyser static analysis.
1903 Only crash-plausible issue would require the Cambridge-specific
1904 iplookup router and a misconfiguration.
1905 Report from Marcin Mirosław.
1907 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1909 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1910 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1911 As part of this, removing so much warning spew let me fix some minor
1912 real issues in debug logging.
1914 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1915 assignment on my part. Fixed.
1917 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1918 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1919 Janne Snabb (who went above and beyond: thank you).
1921 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1922 string otherwise requires a connection and a bunch more work and it's
1923 relatively easy to get wrong. Should also expose TLS library linkage
1926 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1927 64-bit ${eval} (JH/03).
1929 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1930 GNU libc to support some of the 64-bit stuff, should not lead to
1931 conflicts. Defined before os.h is pulled in, so if a given platform
1932 needs to override this, it can.
1934 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1935 protection layer was required, which is not implemented.
1936 Bugzilla 1254, patch from Wolfgang Breyha.
1938 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1939 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1940 tls_dhparam take prime identifiers. Also unbreak combination of
1941 OpenSSL+DH_params+TLSSNI.
1943 PP/39 Disable SSLv2 by default in OpenSSL support.
1949 PP/01 Solaris build fix for Oracle's LDAP libraries.
1950 Bugzilla 1109, patch from Stephen Usher.
1952 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1954 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1957 TF/02 Fix a couple more cases where we did not log the error message
1958 when unlink() failed. See also change 4.74-TF/03.
1960 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1961 lock up or crash if it happened to be inside a call to libc when it
1962 got a SIGUSR1 from exiwhat.
1964 The SIGUSR1 handler appends the current process status to the process
1965 log which is later printed by exiwhat. It used to use the general
1966 purpose logging code to do this, but several functions it calls are
1967 not safe for signals.
1969 The new output code in the SIGUSR1 handler is specific to the process
1970 log, and simple enough that it's easy to inspect for signal safety.
1971 Removing some special cases also simplifies the general logging code.
1972 Removing the spurious timestamps from the process log simplifies
1975 TF/04 Improved ratelimit ACL condition.
1977 The /noupdate option has been deprecated in favour of /readonly which
1978 has clearer semantics. The /leaky, /strict, and /readonly update modes
1979 are mutually exclusive. The update mode is no longer included in the
1980 database key; it just determines when the database is updated. (This
1981 means that when you upgrade Exim will forget old rate measurements.)
1983 Exim now checks that the per_* options are used with an update mode that
1984 makes sense for the current ACL. For example, when Exim is processing a
1985 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1986 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1987 must specify per_mail/readonly. If you omit the update mode it defaults to
1988 /leaky where that makes sense (as before) or /readonly where required.
1990 The /noupdate option is now undocumented but still supported for
1991 backwards compatibility. It is equivalent to /readonly except that in
1992 ACLs where /readonly is required you may specify /leaky/noupdate or
1993 /strict/noupdate which are treated the same as /readonly.
1995 A useful new feature is the /count= option. This is a generalization
1996 of the per_byte option, so that you can measure the throughput of other
1997 aggregate values. For example, the per_byte option is now equivalent
1998 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2000 The per_rcpt option has been generalized using the /count= mechanism
2001 (though it's more complicated than the per_byte equivalence). When it is
2002 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2003 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2004 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2005 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2006 Note that using per_rcpt with a non-readonly update mode in more than
2007 one ACL will cause the recipients to be double-counted. (The per_mail
2008 and per_byte options don't have this problem.)
2010 The handling of very low rates has changed slightly. If the computed rate
2011 is less than the event's count (usually one) then this event is the first
2012 after a long gap. In this case the rate is set to the same as this event's
2013 count, so that the first message of a spam run is counted properly.
2015 The major new feature is a mechanism for counting the rate of unique
2016 events. The new per_addr option counts the number of different
2017 recipients that someone has sent messages to in the last time period. It
2018 behaves like per_rcpt if all the recipient addresses are different, but
2019 duplicate recipient addresses do not increase the measured rate. Like
2020 the /count= option this is a general mechanism, so the per_addr option
2021 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2022 example, measure the rate that a client uses different sender addresses
2023 with the options per_mail/unique=$sender_address. There are further
2024 details in the main documentation.
2026 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2028 TF/06 Removed a few PCRE remnants.
2030 TF/07 Automatically extract Exim's version number from tags in the git
2031 repository when doing development or release builds.
2033 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2034 Bugzilla 879. Patch from Paul Fisher.
2036 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2037 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2040 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2042 PP/05 Variable $av_failed, true if the AV scanner deferred.
2043 Bugzilla 1078. Patch from John Horne.
2045 PP/06 Stop make process more reliably on build failure.
2046 Bugzilla 1087. Patch from Heiko Schlittermann.
2048 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2049 Bugzilla 1089. Patch from Heiko Schlittermann.
2051 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2052 Bugzilla 1131. Patch from Holger Weiß.
2054 PP/09 Handle IPv6 addresses with SPF.
2055 Bugzilla 860. Patch from Wolfgang Breyha.
2057 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2059 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2062 PP/11 match_* no longer expand right-hand-side by default.
2063 New compile-time build option, EXPAND_LISTMATCH_RHS.
2064 New expansion conditions, "inlist", "inlisti".
2066 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2068 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2070 PP/14 fix log_write() format string regression from TF/03.
2071 Bugzilla 1152. Patch from Dmitry Isaikin.
2077 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2079 PP/02 Harmonised TLS library version reporting; only show if debugging.
2080 Layout now matches that introduced for other libraries in 4.74 PP/03.
2082 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2084 PP/04 New "dns_use_edns0" global option.
2086 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2089 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2090 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2092 TK/01 Updated PolarSSL code to 0.14.2.
2093 Bugzilla 1097. Patch from Andreas Metzler.
2095 PP/07 Catch divide-by-zero in ${eval:...}.
2096 Fixes bugzilla 1102.
2098 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2101 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2102 format-string attack -- SECURITY: remote arbitrary code execution.
2104 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2105 time unintentionally subject to list matching rules, letting the header
2106 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2107 arbitrary string expansion). This allowed for information disclosure.
2109 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2110 INT_MIN/-1 -- value coerced to INT_MAX.
2116 NM/01 Workaround for PCRE version dependency in version reporting
2119 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2120 This fixes portability to compilers other than gcc, notably
2121 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2123 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2124 makefiles for portability to HP-UX and POSIX correctness.
2126 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2127 Also via indented variable definition in the Makefile.
2128 (Debugging by Oliver Heesakkers).
2130 PP/02 Restore caching of spamd results with expanded spamd_address.
2131 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2133 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2134 Improves build reliability. Fix from: Frank Elsner
2136 NM/02 Fix wide character breakage in the rfc2047 coding
2137 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2139 NM/03 Allow underscore in dnslist lookups
2140 Fixes bug 1026. Patch from Graeme Fowler
2142 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2143 Code patches from Adam Ciarcinski of NetBSD.
2145 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2148 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2149 is logged, to avoid truncation. Patch from John Horne.
2151 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2152 Patch from Jakob Hirsch.
2154 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2155 SQL string expansion failure details.
2156 Patch from Andrey Oktyabrski.
2158 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2159 Patch from Simon Arlott.
2161 PP/09 New lookups functionality failed to compile on old gcc which rejects
2162 extern declarations in function scope.
2163 Patch from Oliver Fleischmann
2165 PP/10 Use sig_atomic_t for flags set from signal handlers.
2166 Check getgroups() return and improve debugging.
2167 Fixed developed for diagnosis in bug 927 (which turned out to be
2170 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2171 Patch from Mark Zealey.
2173 PP/12 Bugzilla 1056: Improved spamd server selection.
2174 Patch from Mark Zealey.
2176 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2177 Based on patch from Heiko Schlittermann.
2179 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2180 Patch from Uwe Doering, sign-off by Michael Haardt.
2182 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2183 variable declaration deep within a block. Bug and patch from
2186 PP/15 lookups-Makefile IRIX compatibility coercion.
2188 PP/16 Make DISABLE_DKIM build knob functional.
2190 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2191 Patch by Simon Arlott
2193 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2194 variable argument macros. Our copy now differs from upstream.
2200 TF/01 Failure to get a lock on a hints database can have serious
2201 consequences so log it to the panic log.
2203 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2204 controlled using the smtp_confirmation log selector.
2206 TF/03 Include the error message when we fail to unlink a spool file.
2208 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2209 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2210 for maintaining out-of-tree patches for some time.
2212 PP/01 Bugzilla 139: Documentation and portability issues.
2213 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2214 Handle per-OS dynamic-module compilation flags.
2216 PP/02 Let /dev/null have normal permissions.
2217 The 4.73 fixes were a little too stringent and complained about the
2218 permissions on /dev/null. Exempt it from some checks.
2219 Reported by Andreas M. Kirchwitz.
2221 PP/03 Report version information for many libraries, including
2222 Exim version information for dynamically loaded libraries. Created
2223 version.h, now support a version extension string for distributors
2224 who patch heavily. Dynamic module ABI change.
2226 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2227 privilege escalation vulnerability whereby the Exim run-time user
2228 can cause root to append content of the attacker's choosing to
2231 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2234 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2235 If dropping privileges for untrusted macros, we disabled normal logging
2236 on the basis that it would fail; for the Exim run-time user, this is not
2237 the case, and it resulted in successful deliveries going unlogged.
2238 Fixed. Reported by Andreas Metzler.
2244 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2245 only prepend for the Resent-* case. Fixes regression introduced in
2246 Exim 4.70 by NM/22 for Bugzilla 607.
2248 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2249 increasing numbers of administrators be bitten by this.
2251 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2253 PP/03 Bugzilla 994: added openssl_options main configuration option.
2255 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2257 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2259 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2261 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2262 without a peer certificate, leading to a segfault because of an
2263 assumption that peers always have certificates. Be a little more
2264 paranoid. Problem reported by Martin Tscholak.
2266 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2267 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2268 NB: ClamAV planning to remove STREAM in "middle of 2010".
2269 CL also introduces -bmalware, various -d+acl logging additions and
2270 more caution in buffer sizes.
2272 PP/09 Implemented reverse_ip expansion operator.
2274 PP/10 Bugzilla 937: provide a "debug" ACL control.
2276 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2278 PP/12 Bugzilla 973: Implement --version.
2280 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2282 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2284 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2286 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2287 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2288 ignore trailing whitespace.
2290 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2292 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2295 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2296 Notification from Dr Andrew Aitchison.
2298 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2299 ExtendedDetectionInfo response format.
2300 Notification from John Horne.
2302 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2305 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2306 XSL and documented dependency on system catalogs, with examples of how
2309 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2312 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2313 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2314 configuration file which is writeable by the Exim user or group.
2316 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2317 of configuration files to cover files specified with the -C option if
2318 they are going to be used with root privileges, not just the default
2321 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2322 option (effectively making it always true).
2324 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2325 files to be used while preserving root privileges.
2327 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2328 that rogue child processes cannot use them.
2330 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2331 run-time user, instead of root.
2333 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2334 Exim run-time user without dropping privileges.
2336 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2337 result string, instead of calling string_vformat() twice with the same
2340 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2341 for other users. Others should always drop root privileges if they use
2342 -C on the command line, even for a whitelisted configure file.
2344 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2346 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2352 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2353 $data_path, and $header_path variables; fixed documentation bugs and
2356 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2357 exipick to access non-standard spools, including the "frozen" queue
2360 NM/01 Bugzilla 965: Support mysql stored procedures.
2361 Patch from Alain Williams
2363 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2365 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2366 Patch from Andreas Metzler
2368 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2369 Patch from Kirill Miazine
2371 NM/05 Bugzilla 671: Added umask to procmail example.
2373 JJ/03 installed exipick 20100323.0, fixing doc bug
2375 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2376 directory. Notification and patch from Dan Rosenberg.
2378 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2380 TK/02 Improve log output when DKIM signing operation fails.
2382 MH/01 Treat the transport option dkim_domain as a colon separated
2383 list, not as a single string, and sign the message with each element,
2384 omitting multiple occurences of the same signer.
2386 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2387 Bugzilla 985, 986. Patch by Simon Arlott
2389 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2390 Patch by Simon Arlott
2392 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2393 MBX locking. Notification from Dan Rosenberg.
2399 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2401 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2403 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2405 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2407 NM/04 Bugzilla 915: Flag broken perl installation during build.
2413 TK/01 Added patch by Johannes Berg that expands the main option
2414 "spamd_address" if it starts with a dollar sign.
2416 TK/02 Write list of recipients to X-Envelope-Sender header when building
2417 the mbox-format spool file for content scanning (suggested by Jakob
2420 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2421 (http://www.dcc-servers.net/) support via dccifd. Activated by
2422 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2424 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2425 by Mark Daniel Reidel <mr@df.eu>.
2427 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2428 When building exim an external PCRE library is now needed -
2429 PCRE is a system library on the majority of modern systems.
2430 See entry on PCRE_LIBS in EDITME file.
2432 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2433 conversation. Added nologin parameter to request.
2434 Patch contributed by Kirill Miazine.
2436 TF/01 Do not log submission mode rewrites if they do not change the address.
2438 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2440 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2441 log files in place. Contributed by Roberto Lima.
2443 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2445 TF/03 Bugzilla 615: When checking the local_parts router precondition
2446 after a local_part_suffix or local_part_prefix option, Exim now
2447 does not use the address's named list lookup cache, since this
2448 contains cached lookups for the whole local part.
2450 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2451 Robert Millan. Documentation is in experimental-spec.txt.
2453 TF/04 Bugzilla 668: Fix parallel build (make -j).
2455 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2457 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2458 Patch provided by Jan Srzednicki.
2460 TF/05 Leading white space used to be stripped from $spam_report which
2461 wrecked the formatting. Now it is preserved.
2463 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2464 that they are available at delivery time.
2466 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2468 TF/08 TLS error reporting now respects the incoming_interface and
2469 incoming_port log selectors.
2471 TF/09 Produce a more useful error message if an SMTP transport's hosts
2472 setting expands to an empty string.
2474 NM/06 Bugzilla 744: EXPN did not work under TLS.
2475 Patch provided by Phil Pennock.
2477 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2478 Patch provided by Richard Godbee.
2480 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2481 acl_smtp_notquit, added index entry.
2483 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2484 Patch provided by Eugene Bujak.
2486 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2487 accept(). Patch provided by Maxim Dounin.
2489 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2490 Patch provided by Phil Pennock.
2492 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2494 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2495 Patch provided by Brad "anomie" Jorsch.
2497 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2498 Patch provided by Dean Brooks.
2500 TK/05 Add native DKIM support (does not depend on external libraries).
2502 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2503 Patch provided by Graeme Fowler.
2505 NM/16 Bugzilla 851: Documentation example syntax fix.
2507 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2509 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2512 NM/19 Bugzilla 745: TLS version reporting.
2513 Patch provided by Phil Pennock.
2515 NM/20 Bugzilla 167: bool: condition support.
2516 Patch provided by Phil Pennock.
2518 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2519 clients. Patch provided by Phil Pennock.
2521 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2522 Patch provided by Brad "anomie" Jorsch.
2524 NM/23 Bugzilla 687: Fix misparses in eximstats.
2525 Patch provided by Heiko Schlittermann.
2527 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2528 Patch provided by Heiko Schlittermann.
2530 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2531 plus update to original patch.
2533 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2535 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2536 Patch provided by David Brownlee.
2538 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2540 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2542 NM/30 Bugzilla 888: TLS documentation bugfixes.
2544 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2546 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2547 Unlike the original bugzilla I have changed all shell scripts in src tree.
2549 NM/33 Bugzilla 898: Transport filter timeout fix.
2550 Patch by Todd Rinaldo.
2552 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2553 Patch by Serge Demonchaux.
2555 NM/35 Bugzilla 39: Base64 decode bug fixes.
2556 Patch by Jakob Hirsch.
2558 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2560 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2562 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2564 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2570 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2571 ALT-N's libdkim that I have put here:
2572 http://duncanthrax.net/exim-experimental/
2574 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2575 were called 'true' and it seems that C99 defines that as a reserved
2576 keyword to be used with 'bool' variable types. That means you could
2577 not include C99-style headers which use bools without triggering
2578 build errors in sieve.c.
2580 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2581 as mailq or other aliases. Changed the --help handling significantly
2582 to do whats expected. exim_usage() emits usage/help information.
2584 SC/01 Added the -bylocaldomain option to eximstats.
2586 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2588 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2590 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2596 PH/01 Another patch from the Sieve maintainer.
2598 PH/02 When an IPv6 address is converted to a string for single-key lookup
2599 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2600 dots are used instead of colons so that keys in lsearch files need not
2601 contain colons. This was done some time before quoting was made available
2602 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2603 (notated using the quote facility) so as to distinguish them from IPv4
2604 keys. This meant that lookups for IP addresses in host lists did not work
2605 for iplsearch lookups.
2607 This has been fixed by arranging for IPv6 addresses to be expressed with
2608 colons if the lookup type is iplsearch. This is not incompatible, because
2609 previously such lookups could never work.
2611 The situation is now rather anomalous, since one *can* have colons in
2612 ordinary lsearch keys. However, making the change in all cases is
2613 incompatible and would probably break a number of configurations.
2615 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2618 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2619 conversion specification without a maximum field width, thereby enabling
2620 a rogue spamd server to cause a buffer overflow. While nobody in their
2621 right mind would setup Exim to query an untrusted spamd server, an
2622 attacker that gains access to a server running spamd could potentially
2623 exploit this vulnerability to run arbitrary code as the Exim user.
2625 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2626 $primary_hostname instead of what libspf2 thinks the hosts name is.
2628 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2629 a directory entry by the name of the lookup key. Previously, if a
2630 symlink pointed to a non-existing file or a file in a directory that
2631 Exim lacked permissions to read, a lookup for a key matching that
2632 symlink would fail. Now it is enough that a matching directory entry
2633 exists, symlink or not. (Bugzilla 503.)
2635 PH/03 The body_linecount and body_zerocount variables are now exported in the
2638 PH/04 Added the $dnslist_matched variable.
2640 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2641 This means they are set thereafter only if the connection becomes
2644 PH/06 Added the client_condition to authenticators so that some can be skipped
2645 by clients under certain conditions.
2647 PH/07 The error message for a badly-placed control=no_multiline_responses left
2648 "_responses" off the end of the name.
2650 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2652 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2653 (without spaces) instead of just copying the configuration text.
2655 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2657 PH/11 Added $max_received_linelength.
2659 PH/12 Added +ignore_defer and +include_defer to host lists.
2661 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2662 way in which PCRE > 7.0 is built.
2664 PH/14 Implemented queue_only_load_latch.
2666 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2667 MAIL command. The effect was to mangle the value on 64-bit systems.
2669 PH/16 Another patch from the Sieve maintainer.
2671 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2673 PH/18 If a system quota error occurred while trying to create the file for
2674 a maildir delivery, the message "Mailbox is full" was not appended to the
2675 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2676 only to a quota excession during the actual writing of the file.
2678 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2679 characters?) which causes problems in log lines. The DN values are now
2680 passed through string_printing() before being added to log lines.
2682 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2683 and InterBase are left for another time.)
2685 PH/21 Added message_body_newlines option.
2687 PH/22 Guard against possible overflow in moan_check_errorcopy().
2689 PH/23 POSIX allows open() to be a macro; guard against that.
2691 PH/24 If the recipient of an error message contained an @ in the local part
2692 (suitably quoted, of course), incorrect values were put in $domain and
2693 $local_part during the evaluation of errors_copy.
2699 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2700 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2703 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2704 issue a MAIL command.
2706 PH/02 In an ACL statement such as
2708 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2710 if a client was not listed at all, or was listed with a value other than
2711 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2712 the condition was not true (as it should be), so access was not denied.
2713 The bug was that the ! inversion was incorrectly passed on to the second
2714 item. This has been fixed.
2716 PH/03 Added additional dnslists conditions == and =& which are different from
2717 = and & when the dns lookup returns more than one IP address.
2719 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2720 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2722 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2723 FSYNC, which compiles an option called disable_fsync that allows for
2724 bypassing fsync(). The documentation is heavily laced with warnings.
2726 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2728 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2729 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2730 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2731 including adding "make clean"; (3) Added -fPIC when compiling the test
2732 dynamically loaded module, to get rid of a warning.
2734 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2735 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2736 = 0s. The bug is otherwise harmless.
2738 PH/07 There was a bug in the dovecot authenticator such that the value of
2739 $auth1 could be overwritten, and so not correctly preserved, after a
2740 successful authentication. This usually meant that the value preserved by
2741 the server_setid option was incorrect.
2743 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2745 PH/09 Installed PCRE release 7.0.
2747 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2748 run for batched SMTP input. It is now run at the start of every message
2749 in the batch. While fixing this I discovered that the process information
2750 (output by running exiwhat) was not always getting set for -bs and -bS
2751 input. This is fixed, and it now also says "batched" for BSMTP.
2753 PH/11 Added control=no_pipelining.
2755 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2756 patch, slightly modified), and move the expansion of helo_data till after
2757 the connection is made in the smtp transport (so it can use these
2760 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2762 PH/14 Added log_selector = +pid.
2764 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2766 PH/16 Add ${if forany and ${if forall.
2768 PH/17 Added dsn_from option to vary the From: line in DSNs.
2770 PH/18 Flush SMTP output before performing a callout, unless control =
2771 no_callout_flush is set.
2773 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2774 was true (the default) a successful delivery failed to delete the retry
2775 item, thus causing premature timeout of the address. The bug is now
2778 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2780 PH/21 Long custom messages for fakedefer and fakereject are now split up
2781 into multiline responses in the same way that messages for "deny" and
2782 other ACL rejections are.
2784 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2785 with slight modification.
2787 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2788 draft, changing the syntax and factoring some duplicate code".
2790 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2791 for deliveries of the second and subsequent messages over the same SMTP
2794 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2795 ${reduce, with only minor "tidies".
2797 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2799 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2800 expansion side effects.
2802 PH/27 When a message times out after an over-quota error from an Exim-imposed
2803 quota, the bounce message says "mailbox is full". This message was not
2804 being given when it was a system quota that was exceeded. It now should
2807 MH/03 Made $recipients available in local_scan(). local_scan() already has
2808 better access to the recipient list through recipients_list[], but
2809 $recipients can be useful in postmaster-provided expansion strings.
2811 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2812 in the case of a MAIL command with additional options following the
2813 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2814 were accidentally chopped off.
2816 PH/29 SMTP synchronization checks are implemented when a command is read -
2817 there is a check that no more input is waiting when there shouldn't be
2818 any. However, for some commands, a delay in an ACL can mean that it is
2819 some time before the response is written. In this time, more input might
2820 arrive, invalidly. So now there are extra checks after an ACL has run for
2821 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2822 pipelining has not been advertised.
2824 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2826 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2827 returned in the SMTP response when smtp_return_error_details was false.
2828 This has been fixed.
2830 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2831 instead of the C I/O that was originally supplied, because problems were
2832 reported on Solaris.
2834 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2835 Exim which did not show up earlier: it was assuming that a call to
2836 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2837 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2838 was a macro that became an assignment, so it seemed to work. This has
2839 changed to a proper function call with a void return, hence the compile
2840 error. Exim's code has been fixed.
2842 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2845 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2847 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2849 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2850 because it turns out to be too big or there is a timeout) there is no
2851 "Completed" line in the log. When some messages of this type were
2852 selected by exigrep, they were listed as "not completed". Others were
2853 picked up by some special patterns. I have improved the selection
2854 criteria to be more general.
2856 PH/38 The host_find_failed option in the manualroute router can now be set
2857 to "ignore", to completely ignore a host whose IP address cannot be
2858 found. If all hosts are ignored, the behaviour is controlled by the new
2859 host_all_ignored option.
2861 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2862 homing or because of multiple MX records with /mx) generated more than
2863 one IP address, and the following item turned out to be the local host,
2864 all the secondary addresses of the first item were incorrectly removed
2865 from the list, along with the local host and any following hosts (which
2866 is what is supposed to happen).
2868 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2869 whoever called Exim into the -H file. In the case of the daemon it was
2870 behaving confusingly. When first started, it used values for whoever
2871 started the daemon, but after a SIGHUP it used the Exim user (because it
2872 calls itself on a restart). I have changed the code so that it now always
2875 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2876 message are rejected with the same error (e.g. no authentication or bad
2877 sender address), and a DATA command is nevertheless sent (as can happen
2878 with PIPELINING or a stupid MUA), the error message that was given to the
2879 RCPT commands is included in the rejection of the DATA command. This is
2880 intended to be helpful for MUAs that show only the final error to their
2883 PH/42 Another patch from the Sieve maintainer.
2885 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2886 Eximstats - Fixed some broken HTML links and added missing column headers
2888 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2889 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2891 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2893 PH/43 Yet another patch from the Sieve maintainer.
2895 PH/44 I found a way to check for a TCP/IP connection going away before sending
2896 the response to the final '.' that terminates a message, but only in the
2897 case where the client has not sent further data following the '.'
2898 (unfortunately, this is allowed). However, in many cases there won't be
2899 any further data because there won't be any more messages to send. A call
2900 to select() can be used: if it shows that the input is "ready", there is
2901 either input waiting, or the socket has been closed. An attempt to read
2902 the next input character can distinguish the two cases. Previously, Exim
2903 would have sent an OK response which the client would never have see.
2904 This could lead to message repetition. This fix should cure that, at
2905 least in a lot of common cases.
2907 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2908 advertised in response to EHLO.
2914 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2915 fixed by 4.65/MH/01 (is this a record?) are fixed:
2917 (i) An empty string was always treated as zero by the numeric comparison
2918 operators. This behaviour has been restored.
2920 (ii) It is documented that the numeric comparison operators always treat
2921 their arguments as decimal numbers. This was broken in that numbers
2922 starting with 0 were being interpreted as octal.
2924 While fixing these problems I realized that there was another issue that
2925 hadn't been noticed. Values of message_size_limit (both the global option
2926 and the transport option) were treated as octal if they started with 0.
2927 The documentation was vague. These values are now always treated as
2928 decimal, and I will make that clear in the documentation.
2934 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2935 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2938 MH/01 Don't check that the operands of numeric comparison operators are
2939 integers when their expansion is in "skipping" mode (fixes bug
2940 introduced by 4.64-PH/07).
2942 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2943 child addresses, Exim now panics and dies. Previously, because the count
2944 is held in a short int, deliveries were likely to be lost. As such a
2945 large number of recipients for a single message is ridiculous
2946 (performance will be very, very poor), I have chosen to impose a limit
2947 rather than extend the field.
2953 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2954 leftover -K file (the existence of which was triggered by #402).
2955 While we were at it, introduced process PID as part of the -K
2956 filename. This should rule out race conditions when creating
2959 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2960 processing considerably. Previous code took too long for large mails,
2961 triggering a timeout which in turn triggers #401.
2963 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2964 in the DK code in transports.c. sendfile() is not really portable,
2965 hence the _LINUX specificness.
2967 TF/01 In the add_headers option to the mail command in an Exim filter,
2968 there was a bug that Exim would claim a syntax error in any
2969 header after the first one which had an odd number of characters
2972 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2973 callout verification, Exim cached a "reject" for the entire domain. This
2974 is correct for most verifications, but it is not correct for a recipient
2975 verification with use_sender or use_postmaster set, because in that case
2976 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2977 case of MAIL FROM:<> rejection from other early rejections (e.g.
2978 rejection of HELO). When verifying a recipient using a non-null MAIL
2979 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2980 Whatever the result of the callout, the value of the domain cache is
2981 left unchanged (for any other kind of callout, getting as far as trying
2982 RCPT means that the domain itself is ok).
2984 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2987 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2988 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2989 session, the daemon ignores ECONNECT errors and logs others; it now
2990 ignores EPIPE as well.
2992 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2993 (quoted-printable decoding).
2995 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2996 later the small subsequent patch to fix an introduced bug.
2998 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3000 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3002 PH/08 An error is now given if message_size_limit is specified negative.
3004 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3005 to be given (somewhat) arbitrary names.
3007 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3010 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3011 miscellaneous code fixes
3013 PH/10 Added the log_reject_target ACL modifier to specify where to log
3016 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3017 hostname. This is wrong, because it relates to the incoming message (and
3018 probably the interface on which it is arriving) and not to the outgoing
3019 callout (which could be using a different interface). This has been
3020 changed to use the value of the helo_data option from the smtp transport
3021 instead - this is what is used when a message is actually being sent. If
3022 there is no remote transport (possible with a router that sets up host
3023 addresses), $smtp_active_hostname is used.
3025 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3026 tweaks were necessary in order to get it to work (see also 21 below):
3027 (a) The code assumed that strncpy() returns a negative number on buffer
3028 overflow, which isn't the case. Replaced with Exim's string_format()
3030 (b) There were several signed/unsigned issues. I just did the minimum
3031 hacking in of casts. There is scope for a larger refactoring.
3032 (c) The code used strcasecmp() which is not a standard C function.
3033 Replaced with Exim's strcmpic() function.
3034 (d) The code set only $1; it now sets $auth1 as well.
3035 (e) A simple test gave the error "authentication client didn't specify
3036 service in request". It would seem that Dovecot has changed its
3037 interface. Fortunately there's a specification; I followed it and
3038 changed what the client sends and it appears to be working now.
3040 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3043 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3044 address A is aliased to B and C, where B exists and C does not. Without
3045 -v the output is "A verified" because verification stops after a
3046 successful redirection if more than one address is generated. However,
3047 with -v the child addresses are also verified. Exim was outputting "A
3048 failed to verify" and then showing the successful verification for C,
3049 with its parentage. It now outputs "B failed to verify", showing B's
3050 parentage before showing the successful verification of C.
3052 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3053 look up a TXT record in a specific list after matching in a combined
3056 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3057 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3058 they consult the DNS. I had assumed they would set it the way they
3059 wanted; and indeed my experiments on Linux seem to show that in some
3060 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3061 To be on the safe side, however, I have now made the interface to
3062 host_find_byname() similar to host_find_bydns(), with an argument
3063 containing the DNS resolver options. The host_find_byname() function now
3064 sets these options at its start, just as host_find_bydns() does. The smtp
3065 transport options dns_qualify_single and dns_search_parents are passed to
3066 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3067 of host_find_byname() use the default settings of RES_DEFNAMES
3068 (qualify_single) but not RES_DNSRCH (search_parents).
3070 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3071 spool_read_header() do less string testing, by means of a preliminary
3072 switch on the second character of optional "-foo" lines. (This is
3073 overdue, caused by the large number of possibilities that now exist.
3074 Originally there were few.) While I was there, I also converted the
3075 str(n)cmp tests so they don't re-test the leading "-" and the first
3076 character, in the hope this might squeeze out yet more improvement.
3078 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3079 flag allowing group syntax was set by the header_syntax check but not
3080 turned off, possible causing trouble later; (2) The flag was not being
3081 set at all for the header_verify test, causing "group"-style headers to
3082 be rejected. I have now set it in this case, and also caused header_
3083 verify to ignore an empty address taken from a group. While doing this, I
3084 came across some other cases where the code for allowing group syntax
3085 while scanning a header line wasn't quite right (mostly, not resetting
3086 the flag correctly in the right place). These bugs could have caused
3087 trouble for malformed header lines. I hope it is now all correct.
3089 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3090 with the "reply" argument non-NULL. The code, however (which originally
3091 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3092 but it didn't always do it. This confused somebody who was copying the
3093 code for some other use. I have removed all the tests.
3095 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3096 feature that was used to support insecure browsers during the U.S. crypto
3097 embargo. It requires special client support, and Exim is probably the
3098 only MTA that supported it -- and would never use it because real RSA is
3099 always available. This code has been removed, because it had the bad
3100 effect of slowing Exim down by computing (never used) parameters for the
3101 RSA_EXPORT functionality.
3103 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3104 authenticator to fail if there's a tab character in the incoming data
3105 (there should never be unless someone is messing about, as it's supposed
3106 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3107 if the connection is using TLS or if the remote IP is the same as the
3108 local IP, and the "valid-client-cert option" if a client certificate has
3111 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3112 authenticators. This can be used for authorization after authentication
3113 succeeds. (In the case of plaintext, it servers for both authentication
3116 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3117 if any retry times were supplied.
3119 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3120 connection, where there is no client IP address to check. In this
3121 situation, the verify now always succeeds.
3123 PH/25 Applied John Jetmore's -Mset patch.
3125 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3127 PH/27 In a string expansion for a processed (not raw) header when multiple
3128 headers of the same name were present, leading whitespace was being
3129 removed from all of them, but trailing whitespace was being removed only
3130 from the last one. Now trailing whitespace is removed from each header
3131 before concatenation. Completely empty headers in a concatenation (as
3132 before) are ignored.
3134 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3135 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3137 PH/29 [Removed. This was a change that I later backed out, and forgot to
3138 correct the ChangeLog entry (that I had efficiently created) before
3139 committing the later change.]
3141 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3142 address errors (4xx response to RCPT) over the same connection as other
3143 messages routed to the same hosts. Such deliveries are always "forced",
3144 so retry times are not inspected. This resulted in far too many retries
3145 for the affected addresses. The effect occurred only when there were more
3146 hosts than the hosts_max_try setting in the smtp transport when it had
3147 the 4xx errors. Those hosts that it had tried were not added to the list
3148 of hosts for which the message was waiting, so if all were tried, there
3149 was no problem. Two fixes have been applied:
3151 (i) If there are any address or message errors in an SMTP delivery, none
3152 of the hosts (tried or untried) are now added to the list of hosts
3153 for which the message is waiting, so the message should not be a
3154 candidate for sending over the same connection that was used for a
3155 successful delivery of some other message. This seems entirely
3156 reasonable: after all the message is NOT "waiting for some host".
3157 This is so "obvious" that I'm not sure why it wasn't done
3158 previously. Hope I haven't missed anything, but it can't do any
3159 harm, as the worst effect is to miss an optimization.
3161 (ii) If, despite (i), such a delivery is accidentally attempted, the
3162 routing retry time is respected, so at least it doesn't keep
3163 hammering the server.
3165 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3166 in ${readsocket because some servers need this prod.
3168 PH/32 Added some extra debug output when updating a wait-xxx database.
3170 PH/33 The hint "could be header name not terminated by colon", which has been
3171 given for certain expansion errors for a long time, was not being given
3172 for the ${if def:h_colon_omitted{... case.
3174 PH/34 The spec says: "With one important exception, whenever a domain list is
3175 being scanned, $domain contains the subject domain." There was at least
3176 one case where this was not true.
3178 PH/35 The error "getsockname() failed: connection reset by peer" was being
3179 written to the panic log as well as the main log, but it isn't really
3180 panic-worthy as it just means the connection died rather early on. I have
3181 removed the panic log writing for the ECONNRESET error when getsockname()
3184 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3185 runs only) independently of the message's sender address. This meant
3186 that, if the 4xx error was in fact related to the sender, a different
3187 message to the same recipient with a different sender could confuse
3188 things. In particular, this can happen when sending to a greylisting
3189 server, but other circumstances could also provoke similar problems.
3190 I have changed the default so that the retry time for these errors is now
3191 based a combination of the sender and recipient addresses. This change
3192 can be overridden by setting address_retry_include_sender=false in the
3195 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3196 remote server are returned as part of bounce messages. This was not
3197 happening for LMTP over a pipe (the lmtp transport), but now it is the
3198 same for both kinds of LMTP.
3200 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3201 in header lines that were in fact CNAMEs. This is no longer the case.
3203 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3204 and queue runs started by the daemon processed all messages. This has
3205 been fixed so that -R and -S can now usefully be given with -q<time>.
3207 PH/40 Import PCRE release 6.7 (fixes some bugs).
3209 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3211 PH/42 Give an error if -q is specified more than once.
3213 PH/43 Renamed the variables $interface_address and $interface_port as
3214 $received_ip_address and $received_port, to make it clear that these
3215 values apply to message reception, and not to the outgoing interface when
3216 a message is delivered. (The old names remain recognized, of course.)
3218 PH/44 There was no timeout on the connect() call when using a Unix domain
3219 socket in the ${readsocket expansion. There now is.
3221 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3222 be meaningful with "accept".
3224 SC/01 Eximstats V1.43
3225 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3227 SC/02 Eximstats V1.44
3228 Use a glob alias rather than an array ref in the generated
3229 parser. This improves both readability and performance.
3231 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3232 Collect SpamAssassin and rejection statistics.
3233 Don't display local sender or destination tables unless
3234 there is data to show.
3235 Added average volumes into the top table text output.
3237 SC/04 Eximstats V1.46
3238 Collect data on the number of addresses (recipients)
3239 as well as the number of messages.
3241 SC/05 Eximstats V1.47
3242 Added 'Message too big' to the list of mail rejection
3243 reasons (thanks to Marco Gaiarin).
3245 SC/06 Eximstats V1.48
3246 Mainlog lines which have GMT offsets and are too short to
3247 have a flag are now skipped.
3249 SC/07 Eximstats V1.49 (Alain Williams)
3250 Added the -emptyok flag.
3252 SC/08 Eximstats V1.50
3253 Fixes for obtaining the IP address from reject messages.
3255 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3256 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3257 whitespace changes from 4.64-PH/27
3259 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3262 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3263 are found, allow negative numbers in numeric criteria)
3265 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3267 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3268 to match changes made in 4.64-PH/43
3270 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3272 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3273 "domain" is actually an IP address, and force a failure. This locks out
3274 those revolvers/nameservers that support "A-for-A" lookups, in
3275 contravention of the specifications.
3277 PH/48 When a host name was looked up from an IP address, and the subsequent
3278 forward lookup of the name timed out, the host name was left in
3279 $sender_host_name, contrary to the specification.
3281 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3282 restricted to single-key lookups, Exim was not diagnosing an error if
3283 * or *@ was used with a query-style lookup.
3285 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3287 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3288 long ago, but noone interested enough thought of it. Let's just say that
3289 the "1.1" means that there are some new functions that weren't there at
3290 some point in the past.
3292 PH/51 Error processing for expansion failure of helo_data from an smtp
3293 transport during callout processing was broken.
3295 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3296 tested/used via the -bh/-bhc/-bs options.
3298 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3299 bug, fixed in subsequent PCRE releases).
3301 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3302 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3304 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3310 SC/01 Use a glob alias rather than an array ref in eximstats generated
3311 parser. This improves both readability and performance.
3313 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3314 Don't display local sender or destination tables in eximstats unless
3315 there is data to show.
3316 Added average volumes into the eximstats top table text output.
3318 SC/03 Collect data on the number of addresses (recipients) as well
3319 as the number of messages in eximstats.
3321 TF/01 Correct an error in the documentation for the redirect router. Exim
3322 does (usually) call initgroups() when daemonizing.
3324 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3325 with consistent privilege compared to when running as a daemon.
3327 TF/03 Note in the spec that $authenticated_id is not set for local
3328 submissions from trusted users.
3330 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3331 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3333 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3334 by adding some example configuration directives to the default
3335 configuration file. A little bit of work is required to uncomment the
3336 directives and define how usernames and passwords are checked, but
3337 there is now a framework to start from.
3339 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3340 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3341 without this. I don't know how relevant this is to other LDAP libraries.
3343 PH/02 Add the verb name to the "unknown ACL verb" error.
3345 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3347 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3349 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3350 directory not expanded when it should be if an expanded home directory
3351 was set for the address (which is overridden by the transport).
3353 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3356 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3357 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3358 because it is too late at that time, and has no effect.
3360 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3361 security issue with \' (bugzilla #107). I could not use the
3362 PQescapeStringConn() function, because it needs a PGconn value as one of
3365 PH/08 When testing addresses using -bt, indicate those final addresses that
3366 are duplicates that would not cause an additional delivery. At least one
3367 person was confused, thinking that -bt output corresponded to deliveries.
3368 (Suppressing duplicates isn't a good idea as you lose the information
3369 about possibly different redirections that led to the duplicates.)
3371 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3372 systems where poll() doesn't work, in particular OS X.
3374 PH/10 Added more information to debugging output for retry time not reached.
3376 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3377 operations in malware.c.
3379 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3382 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3383 syslog_duplication set false, log lines that would normally be written
3384 both the the main log and to the reject log were not written to syslog at
3387 PH/14 In the default configuration, change the use of "message" in ACL warn
3388 statements to "add_header".
3390 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3391 not followed by a command (e.g. "seen endif").
3393 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3394 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3397 PH/17 Added extra conditions to the default value of delay_warning_condition
3401 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3402 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3403 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3406 The Auto-Submitted: and various List- headers are standardised, whereas I
3407 don't think Precedence: ever was.
3409 PH/18 Refactored debugging code in route_finduser() to show more information,
3410 in particular, the error code if getpwnam() issues one.
3412 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3413 This is apparently needed in addition to the PH/07 change above to avoid
3414 any possible encoding problems.
3416 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3417 but not after initializing Perl.
3419 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3420 output them only if debugging. By default they are written stderr,
3421 apparently, which is not desirable.
3423 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3426 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3429 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3431 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3432 authenticated or an ident call has been made. Suppress the default
3433 values for $authenticated_id and $authenticated_sender (but permit -oMai
3434 and -oMas) when testing with -bh.
3436 PH/24 Re-jigged the order of the tests in the default configuration so that the
3437 tests for valid domains and recipients precede the DNS black list and CSA
3438 tests, on the grounds that those ones are more expensive.
3440 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3441 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3442 This bug exists in every version of Exim that I still have, right back to
3445 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3446 However, an attempt to turn on case-sensitivity in a regex key by
3447 including (?-i) didn't work because the subject string was already
3448 lowercased, and the effects were non-intuitive. It turns out that a
3449 one-line patch can be used to allow (?-i) to work as expected.
3455 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3456 other effects) broke the use of negated acl sub-conditions.
3458 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3461 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3462 "Deny" causes Exim to reject the incoming connection with a 554 error.
3463 Unfortunately, if there is a major crisis, such as a disk failure,
3464 tcp-wrappers gives "deny", whereas what one would like would be some
3465 kind of temporary error. A kludge has been added to help with this.
3466 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3467 554 error is used if errno is still zero or contains ENOENT (which occurs
3468 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3471 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3473 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3474 errors. Otherwise a message that provokes a temporary error (when other
3475 messages do not) can cause a whole host to time out.
3477 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3478 addresses were routed directly to files or pipes from a redirect router.
3479 File deliveries just didn't batch; pipe deliveries might have suffered
3482 PH/06 A failure to get a lock for a hints database would erroneously always say
3483 "Failed to get write lock", even when it was really a read lock.
3485 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3486 of 0600. This has been changed to use the value of the lockfile_mode
3487 option (which defaults to 0600).
3489 PH/08 Applied small patch from the Sieve maintainer.
3491 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3492 folder from quota calculations, a direct delivery into this folder messed
3493 up the contents of the maildirsize file. This was because the regex was
3494 used only to exclude .Trash (or whatever) when the size of the mailbox
3495 was calculated. There was no check that a delivery was happening into an
3496 excluded directory. This bug has been fixed by ignoring all quota
3497 processing for deliveries into excluded directories.
3499 PH/10 Added the maildirfolder_create_regex option to appendfile.
3505 PH/01 The code for finding all the local interface addresses on a FreeBSD
3506 system running IPv6 was broken. This may well have applied to all BSD
3507 systems, as well as to others that have similar system calls. The broken
3508 code found IPv4 interfaces correctly, but gave incorrect values for the
3509 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3510 that it would not match correctly against @[] and not recognize the IPv6
3513 PH/02 The ipliteral router was not recognizing addresses of the form user@
3514 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3516 PH/03 Added disable_ipv6.
3518 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3519 decoded form, because it is most often used to construct To: headers
3520 lines in autoreplies, and the decoded form may well be syntactically
3521 invalid. However, $reply_address has leading white space removed, and all
3522 newlines turned into spaces so that the autoreply transport does not
3525 PH/05 If group was specified without a user on a router, and no group or user
3526 was specified on a transport, the group from the router was ignored.
3528 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3529 for visible compile-time settings that can be used to change these
3530 numbers, for those that want even more. Backwards compatibility with old
3531 spool files has been maintained. However, going back to a previous Exim
3532 release will lost any variables that are in spool files.
3534 PH/07 Two small changes when running in the test harness: increase delay when
3535 passing a TCP/IP connection to a new process, in case the original
3536 process has to generate a bounce, and remove special handling of
3537 127.0.0.2 (sic), which is no longer necessary.
3539 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3540 be the same on different OS.
3542 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3545 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3546 whether --show-vars was specified or not
3548 JJ/02 exipick: Added support for new ACL variable spool format introduced
3551 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3552 syntactically invalid From: or Reply-to: line, and a filter used this to
3553 generate an autoreply, and therefore failed to obtain an address for the
3554 autoreply, Exim could try to deliver to a non-existent relative file
3555 name, causing unrelated and misleading errors. What now happens is that
3556 it logs this as a hard delivery error, but does not attempt to create a
3559 PH/11 The exinext utility has a -C option for testing purposes, but although
3560 the given file was scanned by exinext itself; it wasn't being passed on
3561 when Exim was called.
3563 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3564 an end-of-file indication when reading a command response.
3566 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3567 compiled. In many other places in Exim, IPv6 addresses are always
3568 recognized, so I have changed this. It also means that IPv4 domain
3569 literals of the form [IPV4:n.n.n.n] are now always recognized.
3571 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3572 used if the router is not running as root, for example, when verifying at
3573 ACL time, or when using -bh. The debugging output from this situation was
3574 non-existent - all you got was a failure to exec. I have made two
3577 (a) Failures to set uid/gid, the current directory, or a process leader
3578 in a subprocess such as that created by queryprogram now generate
3579 suitable debugging output when -d is set.
3581 (b) The queryprogram router detects when it is not running as root,
3582 outputs suitable debugging information if -d is set, and then runs
3583 the subprocess without attempting to change uid/gid.
3585 PH/15 Minor change to Makefile for building test_host (undocumented testing
3588 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3589 additional section of a DNS packet that returns MX or SRV records.
3590 Instead, it always explicitly searches for A/AAAA records. This avoids
3591 major problems that occur when a DNS server includes only records of one
3592 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3593 fixed another bug: if SRV records were looked up and the corresponding
3594 address records were *not* found in the additional section, the port
3595 values from the SRV records were lost.
3597 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3598 using the correct key (the original address) when searching the retry
3599 rules in order to find which one to use for generating the retry hint.
3601 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3602 adding the default one. Similarly, if it contains a Reply-To: header, the
3603 errors_reply_to option, if set, is not used.
3605 PH/19 When calculating a retry time, Exim used to measure the "time since
3606 failure" by looking at the "first failed" field in the retry record. Now
3607 it does not use this if it is later than than the arrival time of the
3608 message. Instead it uses the arrival time. This makes for better
3609 behaviour in cases where some deliveries succeed, thus re-setting the
3610 "first failed" field. An example is a quota failure for a huge message
3611 when small messages continue to be delivered. Without this change, the
3612 "time since failure" will always be short, possible causing more frequent
3613 delivery attempts for the huge message than are intended.
3614 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3616 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3617 $1, $2, $3) because the numerical variables can be reset during some
3618 expansion items (e.g. "match"), thereby losing the authentication data.
3620 PH/21 Make -bV show the size of off_t variables so that the test suite can
3621 decide whether to run tests for quotas > 2G.
3623 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3624 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3625 filecount value is greater than 2G or if a quota value is greater than 2G
3626 on a system where the size of off_t is not greater than 4, a panic error
3629 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3630 never match. The debug and -bh output now contains an explicit error
3631 message indicating a malformed IPv4 address or mask.
3633 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3634 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3635 PH/23 above applies.
3637 PH/25 Do not write to syslog when running in the test harness. The only
3638 occasion when this arises is a failure to open the main or panic logs
3639 (for which there is an explicit test).
3641 PH/26 Added the /no_tell option to "control=freeze".
3643 PH/27 If a host name lookup failed very early in a connection, for example, if
3644 the IP address matched host_lookup and the reverse lookup yielded a name
3645 that did not have a forward lookup, an error message of the form "no IP
3646 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3647 could be logged. Now it outputs the IP address instead of "NULL".
3649 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3650 allows the sender and the authenticated sender to be set when
3651 submitting a message from within Exim. Since child_open_exim() is
3652 documented for local_scan(), the new function should be too.
3654 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3655 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3656 results in an empty string is now treated as unset.
3658 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3660 PH/31 Added sender_verify_fail logging option.
3662 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3663 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3664 tidied the source and removed it altogether.
3666 PH/33 When a queue run was abandoned because the load average was too high, a
3667 log line was always written; now it is written only if the queue_run log
3668 selector is set. In addition, the log line for abandonment now contains
3669 information about the queue run such as the pid. This is always present
3670 in "start" and "stop" lines but was omitted from the "abandon" line.
3672 PH/34 Omit spaces between a header name and the colon in the error message that
3673 is given when verify = headers_syntax fails (if there are lots of them,
3674 the message gets confusing).
3676 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3677 names, as there are now some PTR records that contain slashes. This check
3678 is only to protect against broken name servers that fall over on strange
3679 characters, so the fact that it applies to all lookups doesn't matter.
3681 PH/36 Now that the new test suite is complete, we can remove some of the
3682 special code in Exim that was needed for the old test suite. For example,
3683 sorting DNS records because real resolvers return them in an arbitrary
3684 order. The new test suite's fake resolver always returns records in the
3687 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3688 bounces) except when queue_only is set, to avoid logging races between
3689 the different processes.
3691 PH/38 Panic-die if .include specifies a non-absolute path.
3693 PH/39 A tweak to the "H" retry rule from its user.
3695 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3696 a label. They prevented compilation on older perls.
3698 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3699 a warning to be raised on newish perls.
3701 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3702 on queue. Changes to match documented behaviour of showing count of
3703 messages matching specified criteria.
3705 PH/40 Changed the default ident timeout from 30s to 5s.
3707 PH/41 Added support for the use of login_cap features, on those BSD systems
3708 that have them, for controlling the resources used by pipe deliveries.
3710 PH/42 The content-scanning code uses fopen() to create files in which to put
3711 message data. Previously it was not paying any attention to the mode of
3712 the files. Exim runs with umask(0) because the rest of the code creates
3713 files with open(), and sets the required mode explicitly. Thus, these
3714 files were ending up world-writeable. This was not a big issue, because,
3715 being within the spool directory, they were not world-accessible. I have
3716 created a function called modefopen, which takes an additional mode
3717 argument. It sets umask(777), creates the file, chmods it to the required
3718 mode, then resets the umask. All the relevant calls to fopen() in the
3719 content scanning code have been changed to use this function.
3721 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3722 to 24 hours. This avoids potential overflow problems when processing G
3723 and H retry rules. I suspect nobody ever tinkers with this value.
3725 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3727 PH/45 When the plaintext authenticator is running as a client, the server's
3728 challenges are checked to ensure they are valid base64 strings. By
3729 default, the authentication attempt is cancelled if an invalid string is
3730 received. Setting client_ignore_invalid_base64 true ignores these errors.
3731 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3732 they are received. Thus, the responses can be made to depend on the
3733 challenges. If an invalid string is ignored, an empty string is placed in
3736 PH/46 Messages that are created by the autoreply transport now contains a
3737 References: header, in accordance with RFCs 2822 and 3834.
3739 PH/47 Added authenticated_sender_force to the smtp transport.
3741 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3743 PH/49 Installed latest patch from the Sieve maintainer.
3745 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3746 was also set, the appendfile transport was unnecessarily scanning a
3747 directory of message files (e.g. for maildir delivery) to find the count
3748 of files (along with the size), even though it did not need this
3749 information. It now does the scan only if it needs to find either the
3750 size of the count of files.
3752 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3754 PH/52 Two bugs concerned with error handling when the smtp transport is
3757 (i) Exim was not creating retry information for temporary errors given
3758 for individual recipients after the DATA command when the smtp transport
3759 was used in LMTP mode. This meant that they could be retried too
3760 frequently, and not timed out correctly.
3762 (ii) Exim was setting the flag that allows error details to be returned
3763 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3764 recipients that were returned after the DATA command.
3766 PH/53 This is related to PH/52, but is more general: for any failing address,
3767 when detailed error information was permitted to be returned to the
3768 sender, but the error was temporary, then after the final timeout, only
3769 "retry timeout exceeded" was returned. Now it returns the full error as
3770 well as "retry timeout exceeded".
3772 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3773 do this, and (what is worse) MTAs that accept it.
3775 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3776 will now be deprecated.
3778 PH/56 New os.c-cygwin from the Cygwin maintainer.
3780 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3781 formats (previously only available in exim formats via -bpr, -bpru,
3782 and -bpra. Now also available in native and exiqgrep formats)
3784 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3785 with very large, slow to parse queues
3787 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3789 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3791 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3792 responses to authentication challenges, though it was showing the
3793 challenges; (ii) I've removed the CR characters from the debug output for
3796 PH/58 Allow for the insertion of a newline as well as a space when a string
3797 is turned into more than one encoded-word during RFC 2047 encoding. The
3798 Sieve code now uses this.
3800 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3801 data_4xx, lost_connection, tls_required.
3803 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3804 message was being sent as an SMTP response.
3806 PH/61 Add -l and -k options to exicyclog.
3808 PH/62 When verifying, if an address was redirected to one new address, so that
3809 verification continued, and the new address failed or deferred after
3810 having set something in $address_data, the value of $address_data was not
3811 passed back to the ACL. This was different to the case when no
3812 redirection occurred. The value is now passed back in both cases.
3814 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3815 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3816 use login_cap.h, so on its own it isn't the distinguishing feature. The
3817 new name refers directly to the setclassresources() function.
3819 PH/65 Added configuration files for NetBSD3.
3821 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3823 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3824 is preferred over IPv4.
3826 PH/68 The bounce_return_message and bounce_return_body options were not being
3827 honoured for bounces generated during the reception of non-SMTP messages.
3828 In particular, this applied to messages rejected by the ACL. This bug has
3829 been fixed. However, if bounce_return_message is true and bounce_return_
3830 body is false, the headers that are returned for a non-SMTP message
3831 include only those that have been read before the error was detected.
3832 (In the case of an ACL rejection, they have all been read.)
3834 PH/69 The HTML version of the specification is now built in a directory called
3835 spec_html instead of spec.html, because the latter looks like a path with
3836 a MIME-type, and this confuses some software.
3838 PH/70 Catch two compiler warnings in sieve.c.
3840 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3841 function verify_get_ident() calls ip_connect() to connect a socket, but
3842 if the "connect()" function timed out, ip_connect() used to close the
3843 socket. However, verify_get_ident() also closes the socket later, and in
3844 between Exim writes to the log, which may get opened at this point. When
3845 the socket was closed in ip_connect(), the log could get the same file
3846 descriptor number as the socket. This naturally causes chaos. The fix is
3847 not to close the socket in ip_connect(); the socket should be closed by
3848 the function that creates it. There was only one place in the code where
3849 this was missing, in the iplookup router, which I don't think anybody now
3850 uses, but I've fixed it anyway.
3852 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3853 well as to direct DNS lookups. Otherwise the handling of names in host
3854 lists is inconsistent and therefore confusing.
3860 PH/01 Two changes to the default runtime configuration:
3862 (1) Move the checks for relay_from_hosts and authenticated clients from
3863 after to before the (commented out) DNS black list checks.
3865 (2) Add control=submission to the relay_from_hosts and authenticated
3866 clients checks, on the grounds that messages accepted by these
3867 statements are most likely to be submissions.
3869 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3871 (1) Generate an error if the third argument for the ${prvs expansion is
3874 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3877 (3) Reset the variables that are obtained from the first argument of
3878 ${prvscheck and used in the second argument before leaving the code,
3879 because their memory is reclaimed, so using them afterwards may do
3882 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3883 one (it's much easier than Tom thought :-).
3885 (5) Because of (4), we can now allow for the use of $prvscheck_result
3886 inside the third argument.
3888 PH/03 For some reason, the default setting of PATH when running a command from
3889 a pipe transport was just "/usr/bin". I have changed it to
3892 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3893 anything to be listed in the output from -bV.
3895 PH/05 When a filter generated an autoreply, the entire To: header line was
3896 quoted in the delivery log line, like this:
3898 => >A.N.Other <ano@some.domain> <original@ddress> ...
3900 This has been changed so that it extracts the operative address. There
3901 may be more than one such address. If so, they are comma-separated, like
3904 => >ano@some.domain,ona@other.domain <original@ddress> ...
3906 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3907 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3908 not being looked up in the rDNS to get a host name, Exim was showing the
3909 IP address twice in Received: lines, even though the IP addresses were
3910 identical. For example:
3912 Received: from [1.2.3.4] (helo=[1.2.3.4])
3914 However, if the real host name was known, it was omitting the HELO data
3915 if it matched the actual IP address. This has been tidied up so that it
3916 doesn't show the same IP address twice.
3918 PH/07 When both +timestamp and +memory debugging was on, the value given by
3919 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3920 called by the debug printing, thereby overwriting the timestamp buffer.
3921 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3923 PH/08 When the original message was included in an autoreply transport, it
3924 always said "this is a copy of the message, including all the headers",
3925 even if body_only or headers_only was set. It now gives an appropriate
3928 PH/09 Applied a patch from the Sieve maintainer which:
3930 o fixes some comments
3931 o adds the (disabled) notify extension core
3932 o adds some debug output for the result of if/elsif tests
3933 o points to the current vacation draft in the documentation
3934 and documents the missing references header update
3938 o fixes a bug in processing the envelope test (when testing
3939 multiple envelope elements, the last element determined the
3942 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3943 Electronic Mail") by including:
3945 Auto-submitted: auto-generated
3947 in the messages that it generates (bounce messages and others, such as
3948 warnings). In the case of bounce messages for non-SMTP messages, there was
3949 also a typo: it was using "Auto_submitted" (underscore instead of
3950 hyphen). Since every message generated by Exim is necessarily in response
3951 to another message, thes have all been changed to:
3953 Auto-Submitted: auto-replied
3955 in accordance with these statements in the RFC:
3957 The auto-replied keyword:
3959 - SHOULD be used on messages sent in direct response to another
3960 message by an automatic process,
3962 - MUST NOT be used on manually-generated messages,
3964 - MAY be used on Delivery Status Notifications (DSNs) and Message
3965 Disposition Notifications (MDNs),
3967 - MUST NOT be used on messages generated by automatic or periodic
3968 processes, except for messages which are automatic responses to
3971 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3972 to the default Received: header definition.
3974 PH/12 Added log selector acl_warn_skipped (default on).
3976 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3977 variables because (a) they are in the wrong storage pool and (b) even if
3978 they were copied, it wouldn't work properly because of the caching.
3980 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3981 checking when decoding. Apparently there are clients that generate
3982 overlong encoded strings. Why am I not surprised?
3984 PH/15 If the first argument of "${if match_address" was not empty, but did not
3985 contain an "@" character, Exim crashed. Now it writes a panic log message
3986 and treats the condition as false.
3988 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3990 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3991 extension "envelope-auth". The code is finished and in agreement with
3992 other implementations, but there is no documentation so far and in fact,
3993 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3994 not changing the active code.
3996 Print executed "if" and "elsif" statements when debugging is used. This
3997 helps a great deal to understand what a filter does.
3999 Document more things not specified clearly in RFC3028. I had all this
4000 sorted out, when out of a sudden new issues came to my mind. Oops."
4002 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4005 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4006 canonical form (as documented). However, after a host name lookup from
4007 the IP address, check_host() was doing a simple string comparison with
4008 addresses acquired from the DNS when checking that the found name did
4009 have the original IP as one of its addresses. Since any found IPv6
4010 addresses are likely to be in abbreviated form, the comparison could
4011 fail. Luckily, there already exists a function for doing the comparison
4012 by converting both addresses to binary, so now that is used instead of
4013 the text comparison.
4015 PH/20 There was another similar case to PH/19, when a complete host name was
4016 given in a host list; looking up its IP address could give an abbreviated
4017 form, whereas the current host's name might or might not be abbreviated.
4018 The same fix has been applied.
4024 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4025 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4028 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4029 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4031 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4033 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4034 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4035 Also, for "Auto-Submitted", treat anything other than "no" as
4036 non-personal, in accordance with RFC 3834. (Previously it treated
4037 anything starting "auto-" as non-personal.)
4039 TF/01 The control=submission/name=... option had a problem with syntax
4040 errors if the name included a slash character. The /name= option
4041 now slurps the rest of the string, so it can include any characters
4042 but it must come last in the list of options (after /sender_retain
4045 PH/05 Some modifications to the interface to the fake nameserver for the new
4053 TK/01 Added the "success_on_redirect" address verification option. See
4054 NewStuff for rationale and an example.
4056 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4058 PH/02 Patch to exigrep to allow it to work on syslog lines.
4060 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4061 fread() to skip over the body file's header line, because in Cygwin the
4062 header line is locked and is inaccessible.
4064 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4065 co-exist for some time) to make it clear that it is the Exim ID that is
4066 referenced, not the Message-ID: header line.
4068 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4069 string_format() function, because snprintf() does not exist on all
4072 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4073 ${stat: expansion item.
4075 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4076 protocol synchronization error", to keep the pedants happy.
4078 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4079 well as for IRIX systems, when gcc is being used. See the host.c source
4082 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4084 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4087 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4088 transport and to the smtp transport in LMTP mode.
4090 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4092 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4093 run a filter in a subprocess. This could lead to confusion in subsequent
4094 lookups in the parent process. There should also be a search_tidyup() at
4095 the end of the subprocess.
4097 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4098 only if the host matched helo_try_verify_hosts, which caused the
4099 verification to occur when the EHLO/HELO command was issued. The ACL just
4100 tested the remembered result. Now, if a previous verification attempt has
4101 not happened, "verify = helo" does it there and then.
4103 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4105 TK/03 Fix log output including CR from clamd.
4107 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4108 exist provoked a memory error which could cause a segfault.
4110 PH/15 Installed PCRE 6.2
4112 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4114 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4115 of the problem. Specifically, suggested +O2 rather than +O1 for the
4118 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4120 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4121 record, the port was not correctly logged when the outgoing_port log
4122 selector was set (it logged the transort's default port).
4124 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4125 fallback_hosts, and "hosts" in the smtp transport.
4127 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4128 host errors such as "Connection refused".
4130 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4131 authentication with radiusclient 0.4.9:
4133 - Error returned from rc_read_config was caught wrongly
4134 - Username/password not passed on to radius server due to wrong length.
4136 The presumption is that some radiusclient API changes for 4.51/PH/17
4137 were not taken care of correctly. The code is still untested by me (my
4138 Linux distribution still has 0.3.2 of radiusclient), but it was
4139 contributed by a Radius user.
4141 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4142 expanding the "port" option of the smtp transport.
4144 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4145 while reading a MIME header. Thanks to Tom Hughes for a patch.
4147 PH/24 Include config.h inside local_scan.h so that configuration settings are
4150 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4151 that in an ACL for RCPT (for example), you can examine exactly what was
4154 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4155 commands, but it was not correctly comparing the address with the actual
4156 client host address. Thus, it would show the EHLO address in Received:
4157 header lines when this was not necessary.
4159 PH/27 Added the % operator to ${eval:}.
4161 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4162 it should be ignoring failures (because with -C, for example, it has lost
4163 privilege). It wasn't ignoring creation failures other than "already
4166 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4169 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4170 because an input line was too long, either on its own, or by virtue of
4171 too many continuations, the temporary file was not being removed, and the
4172 return code was incorrect.
4174 PH/31 Missing "BOOL" in function definition in filtertest.c.
4176 PH/32 Applied Sieve patches from the maintainer.
4178 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4180 PH/33 Added "verify = not_blind".
4182 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4183 Local/Makefile (with some defaults set). These are used in built scripts
4184 such as exicyclog, but they have never been used in the exim_install
4185 script (though there are many overriding facilities there). I have
4186 arranged that the exim_install script now takes note of these two
4189 PH/35 Installed configuration files for Dragonfly.
4191 PH/36 When a locally submitted message by a trusted user did not contain a
4192 From: header, and the sender address was obtained from -f or from an SMTP
4193 MAIL command, and the trusted user did not use -F to supply a sender
4194 name, $originator_name was incorrectly used when constructing a From:
4195 header. Furthermore, $originator_name was used for submission mode
4196 messages from external hosts without From: headers in a similar way,
4197 which is clearly wrong.
4199 PH/37 Added control=suppress_local_fixups.
4201 PH/38 When log_selector = +received_sender was set, and the addition of the
4202 sender made the log line's construction buffer exactly full, or one byte
4203 less than full, an overflow happened when the terminating "\n" was
4206 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4207 when the result of a list match is failure because a DNS lookup failed.
4209 PH/40 RM_COMMAND is now used in the building process.
4211 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4212 the "build-* directories that it finds.
4214 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4215 address in a domain literal was a prefix of an interface address.
4217 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4218 when verifying a sender address, unless rewrite_headers is false.
4220 PH/44 Wrote a long comment about why errors_to addresses are verified as
4221 recipients, not senders.
4223 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4224 the ratelimit ACL was added.
4226 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4228 PH/46 Added extra information about PostgreSQL errors to the error string.
4230 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4231 avoiding the need to install special zones in a real server. This is
4232 backwards compatible; if it can't find the fake resolver, it drops back.
4233 Thus, both old and new test suites can be run.
4235 TF/02 Added util/ratelimit.pl
4237 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4238 clock is set back in time.
4240 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4241 Candler <B.Candler@pobox.com>.
4243 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4244 OK for addresses that are the result of redirections.
4246 PH/48 A number of further additions for the benefit of the new test suite,
4247 including a fake gethostbyname() that interfaces to the fake DNS resolver
4250 TF/06 The fix for widen_domains has also been applied to qualify_single and
4251 search_parents which are the other dnslookup options that can cause
4254 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4257 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4259 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4260 service" if it encountered an MX record with an empty target hostname.
4261 The message is now "an MX or SRV record indicated no SMTP service".
4263 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4264 if the DNS of the sending site is misconfigured. This is quite a
4265 common situation. This change restores the behaviour of treating a
4266 helo verification defer as a failure.
4268 PH/51 If self=fail was set on a router, the bounce message did not include the
4269 actual error message.
4275 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4277 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4278 command itself ended in error, the underlying message about the transport
4279 filter timeout was being overwritten with the pipe command error. Now the
4280 underlying error message should be appended to the second error message.
4282 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4284 PH/02 Reduce the amount of output that "make" produces by default. Full output
4285 can still be requested.
4287 PH/03 The warning log line about a condition test deferring for a "warn" verb
4288 was being output only once per connection, rather than after each
4289 occurrence (because it was using the same function as for successful
4290 "warn" verbs). This seems wrong, so I have changed it.
4292 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4293 it should not have, which might have caused a crash in the right
4294 circumstances, but probably never did.
4296 PH/04 Installed a modified version of Tony Finch's patch to make submission
4297 mode fix the return path as well as the Sender: header line, and to
4298 add a /name= option so that you can make the user's friendly name appear
4301 TF/03 Added the control = fakedefer ACL modifier.
4303 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4304 Mark Lowes for thorough testing.
4306 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4308 TK/03 Merged latest SRS patch from Miles Wilton.
4310 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4311 with the definition in sysexits.h (which is #included earlier).
4312 Fortunately, Exim does not actually use EX_OK. The code used to try to
4313 preserve the sysexits.h value, by assuming that macro definitions were
4314 scanned for macro replacements. I have been disabused of this notion,
4315 so now the code just undefines EX_OK before #including unistd.h.
4317 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4318 in the smtp transport. When a block could not be written in a single
4319 write() function, the timeout was being re-applied to each part-write.
4320 This seems wrong - if the receiver was accepting one byte at a time it
4321 would take for ever. The timeout is now adjusted when this happens. It
4322 doesn't have to be particularly precise.
4324 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4325 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4327 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4328 without a domain if the check to <postmaster@domain> fails.
4330 SC/01 Eximstats: added -xls and the ability to specify output files
4331 (patch written by Frank Heydlauf).
4333 SC/02 Eximstats: use FileHandles for outputting results.
4335 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4337 SC/04 Eximstats: fixed display of large numbers with -nvr option
4339 SC/05 Eximstats: fixed merging of reports with empty tables.
4341 SC/06 Eximstats: added the -include_original_destination flag
4343 SC/07 Eximstats: removed tabs and trailing whitespace.
4345 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4347 TK/06 MBOX spool code: Add real "From " MBOX separator line
4348 so the .eml file is really in mbox format (even though
4349 most programs do not really care). Patch from Alex Miller.
4351 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4352 The latter is generated from $received_to and is only set if the
4353 message has one envelope recipient. SA can use these headers,
4354 obviously out-of-the-box. Patch from Alex Miller.
4356 PH/08 The ${def test on a variable was returning false if the variable's
4357 value was "0", contrary to what the specification has always said!
4358 The result should be true unless the variable is empty.
4360 PH/09 The syntax error of a character other than { following "${if
4361 def:variable_name" (after optional whitespace) was not being diagnosed.
4362 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4363 accidental colon was present, for example, could give incorrect results.
4365 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4366 result is used (not including appendfile, where other changes are about
4369 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4370 This involved changing a lot of size variables from int to off_t. It
4371 should work with maildirs and everything.
4373 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4374 spamd dying while we are connected to it.
4376 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4379 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4380 function for BDB 4.3.
4382 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4384 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4385 the sources for PCRE have been re-arranged and more files are now
4388 PH/15 The code I had for printing potentially long long variables in PH/11
4389 above was not the best (it lost precision). The length of off_t variables
4390 is now inspected at build time, and an appropriate printing format (%ld
4391 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4392 to be "long long int" or "long int". This is needed for the internal
4393 formatting function string_vformat().
4395 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4396 the configuration file to be ":syslog", then the script "guesses" where
4397 the logs files are, rather than using the compiled in default. In our
4398 case the guess is not the same as the compiled default, so the script
4399 suddenly stopped working when I started to use syslog. The patch checks
4400 to see if log_file_path is "". If so, it attempts to read it from exim
4401 with no configuration file to get the compiled in version, before it
4402 falls back to the previous guessing code."
4404 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4405 implementing BATV in an Exim configuration. See NewStuff for the gory
4408 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4409 Makefile that are specific to HP-UX.
4411 PH/18 If the "use_postmaster" option was set for a recipient callout together
4412 with the "random" option, the postmaster address was used as the MAIL
4413 FROM address for the random test, but not for the subsequent recipient
4414 test. It is now used for both.
4416 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4417 patch removes a few documentation additions to RFC 3028, because the
4418 latest draft now contains them. It adds the new en;ascii-case comparator
4419 and a new error check for 8bit text in MIME parts. Comparator and
4420 require names are now matched exactly. I enabled the subaddress
4421 extension, but it is not well tested yet (read: it works for me)."
4423 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4424 rework some of the code of TK/09 above to avoid the hardwired use of
4425 "%lld" and "long long". Replaced the call to snprintf() with a call to
4428 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4429 records point to non-existent hosts", "retry timeout exceeded", and
4430 "retry time not reached for any host after a long failure period".
4432 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4433 experimental DomainKeys support:
4435 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4436 (2) On an error such as an illegally used "control", the wrong name for
4437 the control was given.
4439 These problems did NOT occur unless DomainKeys support was compiled.
4441 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4443 PH/24 Added ${if match_ip condition.
4445 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4446 databases so that it will be absolutely obvious if a crash occurs in the
4447 DB library. This is a regular occurrence (often caused by mis-matched
4450 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4451 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4452 picked up on a user's system that detects such things. There doesn't seem
4453 to be a gcc warning option for this - only an attribute that has to be
4454 put on the function's prototype. It seems that in Fedora Core 4 they have
4455 set this on a number of new functions. No doubt there will be more in due
4458 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4459 specify a transport. However, if an address that was verified by such a
4460 router was the subject of a callout, Exim crashed because it tried to
4461 read the rcpt_include_affixes from the non-existent transport. Now it
4462 just assumes that the setting of that option is false. This bug was
4463 introduced by 4.51/PH/31.
4465 PH/28 Changed -d+all to exclude +memory, because that information is very
4466 rarely of interest, but it makes the output a lot bigger. People tend to
4467 do -d+all out of habit.
4469 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4470 code in os-type was giving problems when libc.so lives in lib64, like on
4473 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4474 aren't the modern standard, and it seems that some systems' include files
4475 don't always have them. Exim was already checking for some of the newer
4476 ones like T_AAAA, and defining it itself. I've added checks for all the
4477 record types that Exim uses.
4479 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4480 not automatically generating a new one, as it is supposed to. This
4481 prevented TLS from working. If the file did exist, but contained invalid
4482 data, a new version was generated, as expected. It was only the case of a
4483 non-existent file that was broken.
4485 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4486 with a change in libdomainkeys > 0.64.
4488 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4489 from DNS. If the selector record carries the flag, it now has
4490 precedence over the domain-wide flag.
4492 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4494 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4495 the use of a port name that isn't defined in /etc/services) occurred, the
4496 message was deferred as in a normal delivery, and thus remained on the
4497 spool, instead of being failed because of the mua_wrapper setting. This
4498 is now fixed, and I tidied up some of the mua_wrapper messages at the
4501 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4502 the messages in a hash of arrays rather than using individual hashes.
4503 This is a bit cleaner and results in dramatic memory savings, albeit
4504 at a slight CPU cost.
4506 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4507 as requested by Marc Sherman.
4509 SC/10 Eximstats: added histograms for user specified patterns as requested
4512 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4514 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4515 fopen() in the content-scanning modules that did not already have it.
4521 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4522 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4524 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4526 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4528 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4529 to test Sieve filters that use "vacation".
4531 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4532 that changes the way the GnuTLS parameters are stored in the cache file.
4533 The new format can be generated externally. For backward compatibility,
4534 if the data in the cache doesn't make sense, Exim assumes it has read an
4535 old-format file, and it generates new data and writes a new file. This
4536 means that you can't go back to an older release without removing the
4539 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4540 work if there are any delivery delays because "one_time" forces the
4541 parent to be marked "delivered", so its unseen clone is never tried
4542 again. For this reason, Exim now forbids the simultaneous setting of
4545 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4546 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4547 entry if you want to know the details. The fix, however, neglected to
4548 consider the case when local delivery batching is involved. The test for
4549 "previously delivered" was not happening when checking to see if an
4550 address could be batched with a previous (undelivered) one; under
4551 certain circumstances this could lead to multiple deliveries to the same
4554 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4555 in its include files, and this causes problems building Exim.
4557 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4558 header_syntax) but Exim was just ignoring anything given after a slash.
4559 In particular, this caused confusion with an attempt to use "verify =
4560 reverse_host_lookup/defer_ok". An error is now given when options are
4561 supplied for verify items that do not have them. (Maybe reverse_host_
4562 lookup should have a defer_ok option, but that's a different point.)
4564 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4565 defined by RFC 821) to 2048, because there were problems with some AUTH
4566 commands, and RFC 1869 says the size should be increased for extended
4567 SMTP commands that take arguments.
4569 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4572 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4573 "unknown" error; now it says that the functionality isn't in the binary.
4575 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4576 an address' error message when a string expansion fails (syntax or
4577 whatever). Otherwise the password may appear in the log. Following change
4578 PH/42 below, there is no longer a chance of it appearing in a bounce
4581 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4583 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4584 of its addresses was ever tried. (Bugzilla bug #2.)
4586 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4587 the result incorrectly in the debug output. (It correctly added a newline
4588 to what was transported.)
4590 TF/01 Added $received_time.
4592 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4593 commented out examples of how to interface to a virus scanner and to
4594 SpamAssassin. Also added commented examples of av_scanner and
4595 spamd_address settings.
4597 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4598 and controls are allowed in which ACLs. There were a couple of minor
4599 errors. Some of the entries in the conditions table (which is a table of
4600 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4601 negation of where the condition IS allowed.
4603 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4605 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4606 header file does not have a version number, so I've had to invent a new
4607 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4608 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4609 radiusclient), but it was contributed by a Radius user.
4611 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4612 files or directories, for OpenSSL.
4614 PH/19 When an Exim process that is running as root has to create an Exim log
4615 file, it does so in a subprocess that runs as exim:exim so as to get the
4616 ownership right at creation (otherwise, other Exim processes might see
4617 the file with the wrong ownership). There was no test for failure of this
4618 fork() call, which would lead to the process getting stuck as it waited
4619 for a non-existent subprocess. Forks do occasionally fail when resources
4620 run out. I reviewed all the other calls to fork(); they all seem to check
4623 PH/20 When checking for unexpected SMTP input at connect time (before writing
4624 the banner), Exim was not dealing correctly with a non-positive return
4625 from the read() function. If the client had disconnected by this time,
4626 the result was a log entry for a synchronization error with an empty
4627 string after "input=" when read() returned zero. If read() returned -1
4628 (an event I could not check), uninitialized data bytes were printed.
4629 There were reports of junk text (parts of files, etc) appearing after
4632 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4634 PH/22 Added support for macro redefinition, and (re)definition in between
4635 driver and ACL definitions.
4637 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4638 forgetting to use the resulting value; it was using the unexpanded value.
4640 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4641 hadn't been configured. The fix is from Juergen Kreileder, who
4642 understands it better than I do:
4644 "Here's what I see happening with three configured cyrus_sasl
4645 authenticators configured (plain, login, cram-md5):
4647 On startup auth_cyrus_sasl_init() gets called for each of these.
4648 This means three calls to sasl_listmech() without a specified mech_list.
4649 => SASL tests which mechs of all available mechs actually work
4650 => three warnings about OTP not working
4651 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4653 With the patch, sasl_listmech() also gets called three times. But now
4654 SASL's mech_list option is set to the server_mech specified in the the
4655 authenticator. Or in other words, the answer from sasl_listmech()
4656 gets limited to just the mech you're testing for (which is different
4658 => the return list contains just 'plain' or 'login', 'cram-md5' or
4659 nothing depending on the value of ob->server_mech.
4661 I've just tested the patch: Authentication still works fine,
4662 unavailable mechs specified in the exim configuration are still
4663 caught, and the auth.log warnings about OTP are gone."
4665 PH/25 When debugging is enabled, the contents of the command line are added
4666 to the debugging output, even when log_selector=+arguments is not
4669 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4670 answer is "GNU", and only if the return is "GNU/something" is the answer
4673 PH/27 $acl_verify_message is now set immediately after the failure of a
4674 verification in an ACL, and so is available in subsequent modifiers. In
4675 particular, the message can be preserved by coding like this:
4677 warn !verify = sender
4678 set acl_m0 = $acl_verify_message
4680 Previously, $acl_verify_message was set only while expanding "message"
4681 and "log_message" when a very denied access.
4683 PH/28 Modified OS/os.c-Linux with
4685 -#ifndef OS_LOAD_AVERAGE
4686 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4688 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4689 nomenclature these days.)
4691 PH/29 Installed patch from the Sieve maintainer that adds the options
4692 sieve_useraddress and sieve_subaddress to the redirect router.
4694 PH/30 In these circumstances:
4695 . Two addresses routed to the same list of hosts;
4696 . First host does not offer TLS;
4697 . First host accepts first address;
4698 . First host gives temporary error to second address;
4699 . Second host offers TLS and a TLS session is established;
4700 . Second host accepts second address.
4701 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4702 and peerdn, if requested) that were in fact used only for the second
4705 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4706 attention to any local part prefix or suffix that was matched by the
4707 router that accepted the address. It now behaves in the same way as it
4708 does for delivery: the affixes are removed from the local part unless
4709 rcpt_include_affixes is set on the transport.
4711 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4712 timeout during the DATA phase of an incoming message.
4714 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4715 applied a patch sanctioned by the Sieve maintainer.
4717 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4718 the uid or gid is negative. A case of a negative gid caused this to be
4719 noticed. The fix allows for either to be negative.
4721 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4722 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4725 PH/36 The change PH/12 above was broken. Fixed it.
4727 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4728 the grounds that routing the same address twice would always produce the
4729 same answer. This might have been true once, but it is certainly no
4730 longer true now. Routing a child address may depend on the previous
4731 routing that produced that child. Some complicated redirection strategies
4732 went wrong when messages had multiple recipients, and made Exim's
4733 behaviour dependent on the order in which the addresses were given.
4735 I have moved the duplicate checking until after the routing is complete.
4736 Exim scans the addresses that are assigned to local and remote
4737 transports, and removes any duplicates. This means that more work will be
4738 done, as duplicates will always all be routed, but duplicates are
4739 presumably rare, so I don't expect this is of any significance.
4741 For deliveries to pipes, files, and autoreplies, the duplicate checking
4742 still happens during the routing process, since they are not going to be
4745 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4746 It corrects a timeout issue with spamd. This is Ian's comment: "The
4747 background is that sometimes spamd either never reads data from a
4748 connection it has accepted, or it never writes response data. The exiscan
4749 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4750 blindly assumes that writes won't block so it may never time out."
4752 PH/39 Allow G after quota size as well as K and M.
4754 PH/40 The value set for $authenticated_id in an authenticator may not contain
4755 binary zeroes or newlines because the value is written to log lines and
4756 to spool files. There was no check on this. Now the value is run through
4757 the string_printing() function so that such characters are converted to
4758 printable escape sequences.
4760 PH/41 $message_linecount is a new variable that contains the total number of
4761 lines in the message. Compare $body_linecount, which is the count for the
4764 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4765 bounce and delay warning messages, except in certain special cases, which
4768 (a) An SMTP error message from a remote host;
4769 (b) A message specified in a :fail: redirection;
4770 (c) A message specified in a "fail" command in a system filter;
4771 (d) A message specified in a FAIL return from the queryprogram router;
4772 (e) A message specified by the cannot_route_message router option.
4774 In these cases only, Exim does include the error details in bounce and
4775 warning messages. There are also a few cases where bland messages such
4776 as "unrouteable address" or "local delivery error" are given.
4778 PH/43 $value is now also set for the "else" part of a ${run expansion.
4780 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4781 being worked on, but at least Exim now implements the latest version to
4784 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4785 process to complete was treated as a delivery failure, a timeout while
4786 writing the message to the pipe was logged, but erroneously treated as a
4787 successful delivery. Such timeouts include transport filter timeouts. For
4788 consistency with the overall process timeout, these timeouts are now
4789 treated as errors, giving rise to delivery failures by default. However,
4790 there is now a new Boolean option for the pipe transport called
4791 timeout_defer, which, if set TRUE, converts the failures into defers for
4792 both kinds of timeout. A transport filter timeout is now identified in
4795 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4796 systems where "make" and "gmake" are different, calling "gmake" at top
4797 level broke things. I've arranged for the value of $(MAKE) to be passed
4798 from the Makefile to this script so that it can call the same version of
4802 A note about Exim versions 4.44 and 4.50
4803 ----------------------------------------
4805 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4806 changes of various kinds. As a consequence, a big documentation update was
4807 needed. This delayed the release for rather longer than seemed good, especially
4808 in the light of a couple of (minor) security issues. Therefore, the changes
4809 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4810 release. So 4.44 and 4.50 are in effect two different branches that both start
4813 I have left the 4.50 change log unchanged; it contains all the changes since
4814 4.43. The change log for 4.44 is below; many of its items are identical to
4815 those for 4.50. This seems to be the most sensible way to preserve the
4816 historical information.
4822 1. Minor wording change to the doc/README.SIEVE file.
4824 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4825 computation of the current number of files was incorrect.
4827 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4828 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4831 4. Give more explanation in the error message when the command for a transport
4832 filter fails to execute.
4834 5. There are several places where Exim runs a non-Exim command in a
4835 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4836 was being done only for the command run by the queryprogram router. It is
4837 now done for all such subprocesses. The other cases are: ${run, transport
4838 filters, and the commands run by the lmtp and pipe transports.
4840 6. Added CONFIGURE_GROUP build-time option.
4842 7. Some older OS have a limit of 256 on the maximum number of file
4843 descriptors. Exim was using setrlimit() to set 1000 as a large value
4844 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4845 systems. I've change it so that if it can't get 1000, it tries for 256.
4847 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4848 was an oversight, and furthermore, ever since the addition of extra
4849 controls (e.g. 4.43/32), the checks on when to allow different forms of
4850 "control" were broken. There should now be diagnostics for all cases when a
4851 control that does not make sense is encountered.
4853 9. Added the /retain_sender option to "control=submission".
4855 10. $recipients is now available in the predata ACL (oversight).
4857 11. Tidy the search cache before the fork to do a delivery from a message
4858 received from the command line. Otherwise the child will trigger a lookup
4859 failure and thereby defer the delivery if it tries to use (for example) a
4860 cached ldap connection that the parent has called unbind on.
4862 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4863 of $address_data from the recipient verification was clobbered by the
4864 sender verification.
4866 13. The value of address_data from a sender verification is now available in
4867 $sender_address_data in subsequent conditions in the ACL statement.
4869 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4871 15. Added a new option "connect=<time>" to callout options, to set a different
4874 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4875 was its contents. (It was OK if the option was not defined at all.)
4877 17. A "Completed" log line is now written for messages that are removed from
4878 the spool by the -Mrm option.
4880 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4881 information about exactly what failed.
4883 19. Added -dd to debug only the daemon process.
4885 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4886 handles timeouts, both on the server side and network timeouts. Renamed the
4887 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4889 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4890 It is now set to "smtps".
4892 22. $host_address is now set to the target address during the checking of
4893 ignore_target_hosts.
4895 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4896 being passed; this would have caused $sender_host_name to have been used if
4897 matching the list had actually called for a host name (not very likely,
4898 since this list is usually IP addresses). A host name is now passed as
4901 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4902 code that specifies a non-restarting handler (typically sigaction() in
4903 modern systems) in an attempt to fix a rare and obscure crash bug.
4905 25. Narrowed the window for a race in the daemon that could cause it to ignore
4906 SIGCHLD signals. This is not a major problem, because they are used only to
4907 wake it up if nothing else does.
4909 26. A malformed maildirsize file could cause Exim to calculate negative values
4910 for the mailbox size or file count. Odd effects could occur as a result.
4911 The maildirsize information is now recalculated if the size or filecount
4914 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4915 support for a long time. Removed HAVE_SYS_VFS_H.
4917 28. Installed the latest version of exipick from John Jetmore.
4919 29. In an address list, if the pattern was not a regular expression, an empty
4920 subject address (from a bounce message) matched only if the pattern was an
4921 empty string. Non-empty patterns were not even tested. This was the wrong
4922 because it is perfectly reasonable to use an empty address as part of a
4923 database query. An empty address is now tested by patterns that are
4924 lookups. However, all the other forms of pattern expect the subject to
4925 contain a local part and a domain, and therefore, for them, an empty
4926 address still always fails if the pattern is not itself empty.
4928 30. Exim went into a mad DNS loop when attempting to do a callout where the
4929 host was specified on an smtp transport, and looking it up yielded more
4930 than one IP address.
4932 31. Re-factored the code for checking spool and log partition space into a
4933 function that finds that data and another that does the check. The former
4934 is then used to implement four new variables: $spool_space, $log_space,
4935 $spool_inodes, and $log_inodes.
4937 32. The RFC2047 encoding function was originally intended for short strings
4938 such as real names; it was not keeping to the 75-character limit for
4939 encoded words that the RFC imposes. It now respects the limit, and
4940 generates multiple encoded words if necessary. To be on the safe side, I
4941 have increased the buffer size for the ${rfc2047: expansion operator from
4944 33. It is now permitted to omit both strings after an "if" condition; if the
4945 condition is true, the result is "true". As before, when the second string
4946 is omitted, a false condition yields an empty string. This makes it less
4947 cumbersome to write custom ACL and router conditions.
4949 34. Failure to deliver a bounce message always caused it to be frozen, even if
4950 there was an errors_to setting on the router. The errors_to setting is now
4953 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4954 canonical form (fully expanded) before being placed in
4955 $sender_host_address.
4957 36. The table in the code that translates DNS record types into text (T_A to
4958 "A" for instance) was missing entries for NS and CNAME. It is just possible
4959 that this could have caused confusion if both these types were looked up
4960 for the same domain, because the text type is used as part of Exim's
4961 per-process caching. But the chance of anyone hitting this buglet seems
4964 37. The dnsdb lookup has been extended in a number of ways.
4966 (1) There is a new type, "zns", which walks up the domain tree until it
4967 finds some nameserver records. It should be used with care.
4969 (2) There is a new type, "mxh", which is like "mx" except that it returns
4970 just the host names, not the priorities.
4972 (3) It is now possible to give a list of domains (or IP addresses) to be
4973 looked up. The behaviour when one of the lookups defers can be
4974 controlled by a keyword.
4976 (4) It is now possible to specify the separator character for use when
4977 multiple records are returned.
4979 38. The dnslists ACL condition has been extended: it is now possible to supply
4980 a list of IP addresses and/or domains to be looked up in a particular DNS
4983 39. Added log_selector=+queue_time_overall.
4985 40. When running the queue in the test harness, wait just a tad after forking a
4986 delivery process, to get repeatability of debugging output.
4988 41. Include certificate and key file names in error message when GnuTLS fails
4989 to set them up, because the GnuTLS error message doesn't include the name
4990 of the failing file when there is a problem reading it.
4992 42. Allow both -bf and -bF in the same test run.
4994 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4996 44. The "Exiscan patch" is now merged into the mainline Exim source.
4998 45. Sometimes the final signoff response after QUIT could fail to get
4999 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5000 < 0 before doing a fflush(). This bug looks as though it goes back to the
5001 introduction of TLS in release 3.20, but "sometimes" must have been rare
5002 because the tests only now provoked it.
5004 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5005 (this can affect the format of dates).
5007 47. exim_tidydb, when checking for the continued existence of a message for
5008 which it has found a message-specific retry record, was not finding
5009 messages that were in split spool directories. Consequently, it was
5010 deleting retry records that should have stayed in existence.
5012 48. Steve fixed some bugs in eximstats.
5014 49. The SPA authentication driver was not abandoning authentication and moving
5015 on to the next authenticator when an expansion was forced to fail,
5016 contradicting the general specification for all authenticators. Instead it
5017 was generating a temporary error. It now behaves as specified.
5019 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5020 (the order specifies the preference for clients). The order is now AES256,
5021 AES128, 3DES, ARCFOUR128.
5023 51. Small patch to Sieve code - explicitly set From: when generating an
5026 52. Exim crashed if a remote delivery caused a very long error message to be
5027 recorded - for instance if somebody sent an entire SpamAssassin report back
5028 as a large number of 550 error lines. This bug was coincidentally fixed by
5029 increasing the size of one of Exim's internal buffers (big_buffer) that
5030 happened as part of the Exiscan merge. However, to be on the safe side, I
5031 have made the code more robust (and fixed the comments that describe what
5034 53. Now that there can be additional text after "Completed" in log lines (if
5035 the queue_time_overall log selector is set), a one-byte patch to exigrep
5036 was needed to allow it to recognize "Completed" as not the last thing in
5039 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5040 patch that reportedly fixes this has been added. I am not expert enough to
5041 create a test for it. This is what the patch creator wrote:
5043 "I found a little strange behaviour of ldap code when working with
5044 Windows 2003 AD Domain, where users was placed in more than one
5045 Organization Units. When I tried to give exim partial DN, the exit code
5046 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5047 But simultaneously result of request was absolutely normal ldap result,
5048 so I produce this patch..."
5050 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5051 REFERENCE, so I have modified the code to exclude the patch when that macro
5054 55. Some experimental protocols are using DNS PTR records for new purposes. The
5055 keys for these records are domain names, not reversed IP addresses. The
5056 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5057 leaves it alone. Component reversal etc. now happens only for IP addresses.
5060 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5062 57. Double the size of the debug message buffer (to 2048) so that more of very
5063 long debug lines gets shown.
5065 58. The exicyclog utility now does better if the number of log files to keep
5066 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5068 59. Two changes related to the smtp_active_hostname option:
5070 (1) $smtp_active_hostname is now available as a variable.
5071 (2) The default for smtp_banner uses $smtp_active_hostname instead
5072 of $primary_hostname.
5074 60. The host_aton() function is supposed to be passed a string that is known
5075 to be a valid IP address. However, in the case of IPv6 addresses, it was
5076 not checking this. This is a hostage to fortune. Exim now panics and dies
5077 if the condition is not met. A case was found where this could be provoked
5078 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5079 components; fortuitously, this particular loophole had already been fixed
5080 by change 4.50/55 above.
5082 If there are any other similar loopholes, the new check in host_aton()
5083 itself should stop them being exploited. The report I received stated that
5084 data on the command line could provoke the exploit when Exim was running as
5085 exim, but did not say which command line option was involved. All I could
5086 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5087 running as the user.
5090 61. There was a buffer overflow vulnerability in the SPA authentication code
5091 (which came originally from the Samba project). I have added a test to the
5092 spa_base64_to_bits() function which I hope fixes it.
5095 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5096 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5098 63. The daemon start-up calls getloadavg() while still root for those OS that
5099 need the first call to be done as root, but it missed one case: when
5100 deliver_queue_load_max is set with deliver_drop_privilege. This is
5101 necessary for the benefit of the queue runner, because there is no re-exec
5102 when deliver_drop_privilege is set.
5104 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5105 This has been fixed.
5107 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5108 was in use, was not putting the data itself into the right store pool;
5109 consequently, it could be overwritten for a subsequent message in the same
5110 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5113 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5115 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5116 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5117 the function were treating the return as a boolean value, which happened to
5118 work because 0=false and not-0=true, but is not correct code.
5120 68. The host_aton() function was not handling scoped IPv6 addresses (those
5121 with, for example, "%eth0" on the end) correctly.
5123 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5124 negated items (that is, ~something) in unsigned ints. Some compilers
5125 apparently mutter when there is no cast.
5127 70. If an address verification called from an ACL failed, and did not produce a
5128 user-specific message (i.e. there was only a "system" message), nothing was
5129 put in $acl_verify_message. In this situation, it now puts the system
5132 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5133 session; change 4.31/43 added the unwanted input to the log line - except
5134 that it did not do this in the start of session case. It now does.
5136 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5137 This is wrong and can cause the other end to generate a synchronization
5138 error if it is another Exim or anything else that does the synchronization
5139 check. A QUIT command is no longer sent after a timeout.
5141 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5142 during host lookups.
5144 74. The defer_ok option of callout verification was not working if it was used
5145 when verifying addresses in header lines, that is, for this case:
5147 verify = header_sender/callout=defer_ok
5149 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5150 those file descriptors could be used for SMTP connections. If anything
5151 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5152 could be sent to the SMTP client, causing chaos. The daemon now opens
5153 stdin, stdout, and stderr to /dev/null when it puts itself into the
5156 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5157 log by default. The user can override this with suitable Perl magic.
5159 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5160 the log message when discard triggers, was not working for the DATA ACL or
5161 for the non-SMTP ACL.
5163 78. Error message wording change in sieve.c.
5165 79. If smtp_accept_max_per_host was set, the number of connections could be
5166 restricted to fewer than expected, because the daemon was trying to set up
5167 a new connection before checking whether the processes handling previous
5168 connections had finished. The check for completed processes is now done
5169 earlier. On busy systems, this bug wouldn't be noticed because something
5170 else would have woken the daemon, and it would have reaped the completed
5173 80. If a message was submitted locally by a user whose login name contained one
5174 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5175 It caused a spool format error. I have fixed the spool reading code. A
5176 related problem was that the "from" clause in the Received: line became
5177 illegal because of the space(s). It is now covered by ${quote_local_part.
5179 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5182 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5184 83. Patch from Sieve maintainer to fix unterminated string problem in
5185 "vacation" handling.
5187 84. Some minor changes to the Linux configuration files to help with other
5188 OS variants using glibc.
5190 85. One more patch for Sieve to update vacation handling to latest spec.
5193 ----------------------------------------------------
5194 See the note above about the 4.44 and 4.50 releases.
5195 ----------------------------------------------------
5201 1. Change 4.43/35 introduced a bug that caused file counts to be
5202 incorrectly computed when quota_filecount was set in an appendfile
5205 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5206 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5209 3. Give more explanation in the error message when the command for a transport
5210 filter fails to execute.
5212 4. There are several places where Exim runs a non-Exim command in a
5213 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5214 was being done only for the command run by the queryprogram router. It is
5215 now done for all such subprocesses. The other cases are: ${run, transport
5216 filters, and the commands run by the lmtp and pipe transports.
5218 5. Some older OS have a limit of 256 on the maximum number of file
5219 descriptors. Exim was using setrlimit() to set 1000 as a large value
5220 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5221 systems. I've change it so that if it can't get 1000, it tries for 256.
5223 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5224 was an oversight, and furthermore, ever since the addition of extra
5225 controls (e.g. 4.43/32), the checks on when to allow different forms of
5226 "control" were broken. There should now be diagnostics for all cases when a
5227 control that does not make sense is encountered.
5229 7. $recipients is now available in the predata ACL (oversight).
5231 8. Tidy the search cache before the fork to do a delivery from a message
5232 received from the command line. Otherwise the child will trigger a lookup
5233 failure and thereby defer the delivery if it tries to use (for example) a
5234 cached ldap connection that the parent has called unbind on.
5236 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5237 of $address_data from the recipient verification was clobbered by the
5238 sender verification.
5240 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5241 was its contents. (It was OK if the option was not defined at all.)
5243 11. A "Completed" log line is now written for messages that are removed from
5244 the spool by the -Mrm option.
5246 12. $host_address is now set to the target address during the checking of
5247 ignore_target_hosts.
5249 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5250 being passed; this would have caused $sender_host_name to have been used if
5251 matching the list had actually called for a host name (not very likely,
5252 since this list is usually IP addresses). A host name is now passed as
5255 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5256 code that specifies a non-restarting handler (typically sigaction() in
5257 modern systems) in an attempt to fix a rare and obscure crash bug.
5259 15. Narrowed the window for a race in the daemon that could cause it to ignore
5260 SIGCHLD signals. This is not a major problem, because they are used only to
5261 wake it up if nothing else does.
5263 16. A malformed maildirsize file could cause Exim to calculate negative values
5264 for the mailbox size or file count. Odd effects could occur as a result.
5265 The maildirsize information is now recalculated if the size or filecount
5268 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5269 support for a long time. Removed HAVE_SYS_VFS_H.
5271 18. Updated exipick to current release from John Jetmore.
5273 19. Allow an empty sender to be matched against a lookup in an address list.
5274 Previously the only cases considered were a regular expression, or an
5277 20. Exim went into a mad DNS lookup loop when doing a callout where the
5278 host was specified on the transport, if the DNS lookup yielded more than
5281 21. The RFC2047 encoding function was originally intended for short strings
5282 such as real names; it was not keeping to the 75-character limit for
5283 encoded words that the RFC imposes. It now respects the limit, and
5284 generates multiple encoded words if necessary. To be on the safe side, I
5285 have increased the buffer size for the ${rfc2047: expansion operator from
5288 22. Failure to deliver a bounce message always caused it to be frozen, even if
5289 there was an errors_to setting on the router. The errors_to setting is now
5292 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5293 canonical form (fully expanded) before being placed in
5294 $sender_host_address.
5296 24. Updated eximstats to version 1.33
5298 25. Include certificate and key file names in error message when GnuTLS fails
5299 to set them up, because the GnuTLS error message doesn't include the name
5300 of the failing file when there is a problem reading it.
5302 26. Expand error message when OpenSSL has problems setting up cert/key files.
5305 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5306 (this can affect the format of dates).
5308 28. exim_tidydb, when checking for the continued existence of a message for
5309 which it has found a message-specific retry record, was not finding
5310 messages that were in split spool directories. Consequently, it was
5311 deleting retry records that should have stayed in existence.
5313 29. eximstats updated to version 1.35
5314 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5315 1.35 - bugfix such that pie charts by volume are generated correctly
5317 30. The SPA authentication driver was not abandoning authentication and moving
5318 on to the next authenticator when an expansion was forced to fail,
5319 contradicting the general specification for all authenticators. Instead it
5320 was generating a temporary error. It now behaves as specified.
5322 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5323 (the order specifies the preference for clients). The order is now AES256,
5324 AES128, 3DES, ARCFOUR128.
5326 31. Small patch to Sieve code - explicitly set From: when generating an
5329 32. Exim crashed if a remote delivery caused a very long error message to be
5330 recorded - for instance if somebody sent an entire SpamAssassin report back
5331 as a large number of 550 error lines. This bug was coincidentally fixed by
5332 increasing the size of one of Exim's internal buffers (big_buffer) that
5333 happened as part of the Exiscan merge. However, to be on the safe side, I
5334 have made the code more robust (and fixed the comments that describe what
5337 33. Some experimental protocols are using DNS PTR records for new purposes. The
5338 keys for these records are domain names, not reversed IP addresses. The
5339 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5340 leaves it alone. Component reversal etc. now happens only for IP addresses.
5343 34. The host_aton() function is supposed to be passed a string that is known
5344 to be a valid IP address. However, in the case of IPv6 addresses, it was
5345 not checking this. This is a hostage to fortune. Exim now panics and dies
5346 if the condition is not met. A case was found where this could be provoked
5347 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5348 components; fortuitously, this particular loophole had already been fixed
5349 by change 4.50/55 or 4.44/33 above.
5351 If there are any other similar loopholes, the new check in host_aton()
5352 itself should stop them being exploited. The report I received stated that
5353 data on the command line could provoke the exploit when Exim was running as
5354 exim, but did not say which command line option was involved. All I could
5355 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5356 running as the user.
5359 35. There was a buffer overflow vulnerability in the SPA authentication code
5360 (which came originally from the Samba project). I have added a test to the
5361 spa_base64_to_bits() function which I hope fixes it.
5364 36. The daemon start-up calls getloadavg() while still root for those OS that
5365 need the first call to be done as root, but it missed one case: when
5366 deliver_queue_load_max is set with deliver_drop_privilege. This is
5367 necessary for the benefit of the queue runner, because there is no re-exec
5368 when deliver_drop_privilege is set.
5370 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5371 was in use, was not putting the data itself into the right store pool;
5372 consequently, it could be overwritten for a subsequent message in the same
5373 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5376 38. Sometimes the final signoff response after QUIT could fail to get
5377 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5378 < 0 before doing a fflush(). This bug looks as though it goes back to the
5379 introduction of TLS in release 3.20, but "sometimes" must have been rare
5380 because the tests only now provoked it.
5386 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5387 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5388 Now it returns an integer. A number of calls were still expecting a T/F
5389 return. Fortuitously, in all cases, the tests worked in OK situations,
5390 which is the norm. However, things would have gone wrong on any write
5391 failures on the smtp file descriptor. This function is used when sending
5392 messages over SMTP and also when doing verify callouts.
5394 2. When Exim is called to do synchronous delivery of a locally submitted
5395 message (the -odf or -odi options), it no longer closes stderr before doing
5398 3. Implemented the mua_wrapper option.
5400 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5402 5. Implemented the functions header_remove(), header_testname(),
5403 header_add_at_position(), and receive_remove_recipient(), and exported them
5406 6. If an ACL "warn" statement specified the addition of headers, Exim already
5407 inserted X-ACL-Warn: at the start if there was no header name. However, it
5408 was not making this test for the second and subsequent header lines if
5409 there were newlines in the string. This meant that an invalid header could
5410 be inserted if Exim was badly configured.
5412 7. Allow an ACL "warn" statement to add header lines at the start or after all
5413 the Received: headers, as well as at the end.
5415 8. Added the rcpt_4xx retry error code.
5417 9. Added postmaster_mailfrom=xxx to callout verification option.
5419 10. Added mailfrom=xxxx to the callout verification option, for verify=
5422 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5423 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5425 12. Inserted some casts to stop certain compilers warning when using pointer
5426 differences as field lengths or precisions in printf-type calls (mostly
5427 affecting debugging statements).
5429 13. Added optional readline() support for -be (dynamically loaded).
5431 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5432 same clock tick as a message's arrival, so that its received time was the
5433 same as the "first fail" time on the retry record, and that message
5434 remained on the queue past the ultimate address timeout, every queue runner
5435 would try a delivery (because it was past the ultimate address timeout) but
5436 after another failure, the ultimate address timeout, which should have then
5437 bounced the address, did not kick in. This was a "< instead of <=" error;
5438 in most cases the first failure would have been in the next clock tick
5439 after the received time, and all would be well.
5441 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5442 being recognized when the domain list was tested by the match_domain
5443 condition in an expansion string.
5445 16. Added the ${str2b64: operator.
5447 17. Exim was always calling setrlimit() to set a large limit for the number of
5448 processes, without checking whether the existing limit was already
5449 adequate. (It did check for the limit on file descriptors.) Furthermore,
5450 errors from getrlimit() and setrlimit() were being ignored. Now they are
5451 logged to the main and panic logs, but Exim does carry on, to try to do its
5452 job under whatever limits there are.
5454 18. Imported PCRE 5.0.
5456 19. Trivial typo in log message " temporarily refused connection" (the leading
5459 20. If the log selector return_path_on_delivery was set and an address was
5460 redirected to /dev/null, the delivery process crashed because it assumed
5461 that a return path would always be set for a "successful" delivery. In this
5462 case, the whole delivery is bypassed as an optimization, and therefore no
5465 21. Internal re-arrangement: the function for sending a challenge and reading
5466 a response while authentication was assuming a zero-terminated challenge
5467 string. It's now changed to take a pointer and a length, to allow for
5468 binary data in such strings.
5470 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5472 23. Exim was not respecting finduser_retries when seeking the login of the
5473 uid under which it was called; it was always trying 10 times. (The default
5474 setting of finduser_retries is zero.) Also, it was sleeping after the final
5475 failure, which is pointless.
5477 24. Implemented tls_on_connect_ports.
5479 25. Implemented acl_smtp_predata.
5481 26. If the domain in control=submission is set empty, Exim assumes that the
5482 authenticated id is a complete email address when it generates From: or
5483 Sender: header lines.
5485 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5486 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5487 chown and chgrp in /bin and hostname in /usr/bin.
5489 28. Exim was keeping the "process log" file open after each use, just as it
5490 does for the main log. This opens the possibility of it remaining open for
5491 long periods when the USR1 signal hits a daemon. Occasional processlog
5492 errors were reported, that could have been caused by this. Anyway, it seems
5493 much more sensible not to leave this file open at all, so that is what now
5496 29. The long-running daemon process does not normally write to the log once it
5497 has entered its main loop, and it closes the log before doing so. This is
5498 so that log files can straightforwardly be renamed and moved. However,
5499 there are a couple of unusual error situations where the daemon does write
5500 log entries, and I had neglected to close the log afterwards.
5502 30. The text of an SMTP error response that was received during a remote
5503 delivery was being truncated at 512 bytes. This is too short for some of
5504 the long messages that one sometimes sees. I've increased the limit to
5507 31. It is now possible to make retry rules that apply only when a message has a
5508 specific sender, in particular, an empty sender.
5510 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5511 it possible to be selective about when SMTP synchronization is enforced.
5513 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5515 32. Implemented hosts_connection_nolog.
5517 33. Added an ACL for QUIT.
5519 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5522 35. Added mailbox_size and mailbox_filecount to appendfile.
5524 36. Added control = no_multiline_responses to ACLs.
5526 37. There was a bug in the logic of the code that waits for the clock to tick
5527 in the case where the clock went backwards by a substantial amount such
5528 that the microsecond fraction of "now" was more than the microsecond
5529 fraction of "then" (but the whole seconds number was less).
5531 38. Added support for the libradius Radius client library this is found on
5532 FreeBSD (previously only the radiusclient library was supported).
5538 1. When certain lookups returned multiple values in the form name=value, the
5539 quoting of the values was not always being done properly. Specifically:
5540 (a) If the value started with a double quote, but contained no whitespace,
5542 (b) If the value contained whitespace other than a space character (i.e.
5543 tabs or newlines or carriage returns) it was not quoted.
5544 This fix has been applied to the mysql and pgsql lookups by writing a
5545 separate quoting function and calling it from the lookup code. The fix
5546 should probably also be applied to nisplus, ibase and oracle lookups, but
5547 since I cannot test any of those, I have not disturbed their existing code.
5549 2. A hit in the callout cache for a specific address caused a log line with no
5550 reason for rejecting RCPT. Now it says "Previous (cached) callout
5551 verification failure".
5553 3. There was an off-by-one bug in the queryprogram router. An over-long
5554 return line was truncated at 256 instead of 255 characters, thereby
5555 overflowing its buffer with the terminating zero. As well as fixing this, I
5556 have increased the buffer size to 1024 (and made a note to document this).
5558 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5559 when Exim is waiting for an SMTP response from a remote server, Exim
5560 restarts its select() call on the socket, thereby resetting its timeout.
5561 This is not a problem when such interrupts are rare. Somebody set up a cron
5562 job to run exiwhat every 2 minutes, which is less than the normal select()
5563 timeout (5 or 10 minutes). This meant that the select() timeout never
5564 kicked in because it was always reset. I have fixed this by comparing the
5565 time when an interrupt arrives with the time at the start of the first call
5566 to select(). If more time than the timeout has elapsed, the interrupt is
5567 treated as a timeout.
5569 5. Some internal re-factoring in preparation for the addition of Sieve
5570 extensions (by MH). In particular, the "personal" test is moved to a
5571 separate function, and given an option for scanning Cc: and Bcc: (which is
5572 not set for Exim filters).
5574 6. When Exim created an email address using the login of the caller as the
5575 local part (e.g. when creating a From: or Sender: header line), it was not
5576 quoting the local part when it contained special characters such as @.
5578 7. Installed new OpenBSD configuration files.
5580 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5581 try to make them clearer.
5583 9. Callout options, other than the timeout value, were being ignored when
5584 verifying sender addresses in header lines. For example, when using
5586 verify = header_sender/callout=no_cache
5588 the cache was (incorrectly) being used.
5590 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5591 only the Cygwin environment.
5593 11. When return_path_on_delivery was set as a log selector, if different remote
5594 addresses in the same message used different return paths and parallel
5595 remote delivery occurred, the wrong values would sometimes be logged.
5596 (Whenever a remote delivery process finished, the return path value from
5597 the most recently started remote delivery process was logged.)
5599 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5600 lines when AUTH and/or TLS are in use. This is the "received protocol"
5601 field. Exim used to use "asmtp" for authenticated SMTP, without any
5602 indication (in the protocol name) for TLS use. Now it follows the RFC and
5603 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5604 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5605 names appear in log lines as well as in Received: header lines.
5607 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5608 extensions, and comparison tests, and to fix some bugs.
5610 14. Changes to the "personal" filter test:
5612 (1) The test was buggy in that it was just doing the equivalent of
5613 "contains" tests on header lines. For example, if a user's address was
5614 anne@some.where, the "personal" test would incorrectly be true for
5616 To: susanne@some.where
5618 This test is now done by extracting each address from the header in turn,
5619 and checking the entire address. Other tests that are part of "personal"
5620 are now done using regular expressions (for example, to check local parts
5621 of addresses in From: header lines).
5623 (2) The list of non-personal local parts in From: addresses has been
5624 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5625 taken from the Sieve specification recommendations.
5627 (3) If the message contains any header line starting with "List-" it is
5628 treated as non-personal.
5630 (4) The test for "circular" in the Subject: header line has been removed
5631 because it now seems ill-conceived.
5633 15. Minor typos in src/EDITME comments corrected.
5635 16. Installed latest exipick from John Jetmore.
5637 17. If headers_add on a router specified a text string that was too long for
5638 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5639 of string_sprintf() is now avoided.
5641 18. $message_body_size was not set (it was always zero) when running the DATA
5642 ACL and the local_scan() function.
5644 19. For the "mail" command in an Exim filter, no default was being set for
5645 the once_repeat time, causing a random time value to be used if "once" was
5646 specified. (If the value happened to be <= 0, no repeat happened.) The
5647 default is now 0s, meaning "never repeat". The "vacation" command was OK
5648 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5649 (I found it when inspecting the code).
5651 20. There is now an overall timeout for performing a callout verification. It
5652 defaults to 4 times the callout timeout, which applies to individual SMTP
5653 commands during the callout. The overall timeout applies when there is more
5654 than one host that can be tried. The timeout is checked before trying the
5655 next host. This prevents very long delays if there are a large number of
5656 hosts and all are timing out (e.g. when the network connections are timing
5657 out). The value of the overall timeout can be changed by specifying an
5658 additional sub-option for "callout", called "maxwait". For example:
5660 verify = sender/callout=5s,maxwait=20s
5662 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5663 to the end before writing, but this should make it even safer).
5665 22. Exim was forgetting that it had advertised PIPELINING for the second and
5666 subsequent messages on an SMTP connection. It was also not resetting its
5667 memory on STARTTLS and an internal HELO.
5669 23. When Exim logs an SMTP synchronization error within a session, it now
5670 records whether PIPELINING has been advertised or not.
5672 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5673 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5674 rather than long int.
5676 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5678 26. Added the never_mail option to autoreply.
5684 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5685 crash if the getsockname() call failed; this can happen if a connection is
5686 closed very soon after it is established. The problem was simply in the
5687 order in which certain operations were done, causing Exim to try to write
5688 to the SMTP stream before it had set up the file descriptor. The bug has
5689 been fixed by making things happen in the correct order.
5695 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5696 before the connection was closed, thus losing the rejection response.
5698 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5699 some early Solaris releases, but causes trouble in current releases where
5700 socklen_t is defined.
5702 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5705 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5708 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5709 that releasing the top of it at the end releases what was used for sub-
5710 expansions (unless the block got too big). However, discard this block if
5711 the first thing is a variable or header, so that we can use its block when
5712 it is dynamic (useful for very large $message_headers, for example).
5714 6. Lookups now cache *every* query, not just the most recent. A new, separate
5715 store pool is used for this. It can be recovered when all lookup caches are
5716 flushed. Lookups now release memory at the end of their result strings.
5717 This has involved some general refactoring of the lookup sources.
5719 7. Some code has been added to the store_xxx() functions to reduce the amount
5720 of flapping under certain conditions.
5722 8. log_incoming_interface used to affect only the <= reception log lines. Now
5723 it causes the local interface and port to be added to several more SMTP log
5724 lines, for example "SMTP connection from", and rejection lines.
5726 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5728 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5730 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5731 could be overwritten at the end of the current message (or the start of a
5732 new message if it was set in a HELO ACL). The value is now preserved for
5733 the duration of the SMTP connection.
5735 12. If a transport had a headers_rewrite setting, and a matching header line
5736 contained an unqualified address, that address was qualified, even if it
5737 did not match any rewriting rules. The underlying bug was that the values
5738 of the flags that permit the existence of unqualified sender and recipient
5739 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5740 non-local messages, and by -bnq for local messages) were not being
5741 preserved with the message after it was received.
5743 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5744 "next input=" as part of the text comprising the host identity instead of
5745 the correct text. The code was using the same buffer for two different
5746 strings. However, depending on which order the printing function evaluated
5747 its arguments, the bug did not always show up. Under Linux, for example, my
5748 test suite worked just fine.
5750 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5751 doesn't work with some older versions of Perl. It has been changed to "my",
5752 which in any case is probably the better facility to use.
5754 15. A really picky compiler found some instances of statements for creating
5755 error messages that either had too many or two few arguments for the format
5758 16. The size of the buffer for calls to the DNS resolver has been increased
5759 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5760 for addresses that have a lot of PTR records. This alleviates a problem; it
5761 does not fully solve it.
5763 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5764 buffer now truncates the list and logs the incident, which is the same
5765 action as happens when Exim is looking up a host name and its aliases.
5766 Previously in this situation something unpredictable would happen;
5767 sometimes it was "internal error: store_reset failed".
5769 18. If a server dropped the connection unexpectedly when an Exim client was
5770 using GnuTLS and trying to read a response, the client delivery process
5771 crashed while trying to generate an error log message.
5773 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5774 string, for example:
5776 warn message = H1: something\nH2: something
5778 the text was added as a single header line from Exim's point of view
5779 though it ended up OK in the delivered message. However, searching for the
5780 second and subsequent header lines using $h_h2: did not work. This has been
5781 fixed. Similarly, if a system filter added multiple headers in this way,
5782 the routers could not see them.
5784 20. Expanded the error message when iplsearch is called with an invalid key to
5785 suggest using net-iplsearch in a host list.
5787 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5788 ACLs are no longer actually imposed (and a message to that effect is
5791 22. If a "gecos" field in a passwd entry contained escaped characters, in
5792 particular, if it contained a \" sequence, Exim got it wrong when building
5793 a From: or a Sender: header from that name. A second bug also caused
5794 incorrect handling when an unquoted " was present following a character
5795 that needed quoting.
5797 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5798 was not being matched caselessly.
5800 24. Arranged for all hyphens in the exim.8 source to be escaped with
5803 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5804 properly. Recipient callout cache records were still being keyed to include
5805 the sender, even when use_sender was set false. This led to far more
5806 callouts that were necessary. The sender is no longer included in the key
5807 when use_sender is false.
5809 26. Added "control = submission" modifier to ACLs.
5811 27. Added the ${base62d: operator to decode base 62 numbers.
5813 28. dnsdb lookups can now access SRV records.
5815 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5816 the configuration file.
5818 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5819 (-v) mode. This makes the output for a verbose queue run more intelligible.
5821 31. Added a use_postmaster feature to recipient callouts.
5823 32. Added the $body_zerocount variable, containing the number of binary zero
5824 bytes in the message body.
5826 33. The time of last modification of the "new" subdirectory is now used as the
5827 "mailbox time last read" when there is a quota error for a maildir
5830 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5832 35. Added +ignore_unknown as a special item in host lists.
5834 36. Code for decoding IPv6 addresses in host lists is now included, even if
5835 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5836 address was recognized as an IP address, but was then not correctly decoded
5837 into binary, causing unexpected and incorrect effects when compared with
5844 1. Very minor rewording of debugging text in manualroute to say "list of
5845 hosts" instead of "hostlist".
5847 2. If verify=header_syntax was set, and a header line with an unqualified
5848 address (no domain) and a large number of spaces between the end of the
5849 name and the colon was received, the reception process suffered a buffer
5850 overflow, and (when I tested it) crashed. This was caused by some obsolete
5851 code that should have been removed. The fix is to remove it!
5853 3. When running in the test harness, delay a bit after writing a bounce
5854 message to get a bit more predictability in the log output.
5856 4. Added a call to search_tidyup() just before forking a reception process. In
5857 theory, someone could use a lookup in the expansion of smtp_accept_max_
5858 per_host which, without the tidyup, could leave open a database connection.
5860 5. Added the variables $recipient_data and $sender_data which get set from a
5861 lookup success in an ACL "recipients" or "senders" condition, or a router
5862 "senders" option, similar to $domain_data and $local_part_data.
5864 6. Moved the writing of debug_print from before to after the "senders" test
5867 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5868 problems for message scanning, either using a data ACL, or using
5869 local_scan() because the Received: header was not generated till after they
5870 were called (in order to set the time as the time of reception completion).
5871 I have revised the way this works. The header is now generated after the
5872 body is received, but before the ACL or local_scan() are called. After they
5873 are run, the timestamp in the header is updated.
5879 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5880 before starting a queue runner without re-exec. This happened only when
5881 deliver_drop_privilege was set or when the Exim user was set to root. The
5882 effect of the bug was that timeouts during subsequent deliveries caused
5883 crashes instead of being properly handled. The handler is now left at its
5884 default (and expected) setting.
5886 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5887 message, again when deliver_drop_privilege is set or Exim is run as root.
5888 The bug described in (1) was not present in this case, but the tidying up
5889 of the other signals was missing. I have made the two cases consistent.
5891 3. The ignore_target_hosts setting on a manualroute router was being ignored
5892 for hosts that were looked up using the /MX notation.
5894 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5897 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5898 operated on the sender address. After changing the $sender_address to <>
5899 for the sender address verify, Exim was re-instated it as the original
5900 (before rewriting) address, but remembering that it had rewritten it, so it
5901 wasn't rewriting it again. This bug also had the effect of breaking the
5902 sender address verification caching when the sender address was rewritten.
5904 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5905 This has been changed so that if the ip literal address matches
5906 ignore_target_hosts, the router declines.
5908 7. Added expansion conditions match_domain, match_address, and match_local_
5909 part (NOT match_host).
5911 8. The placeholder for the Received: header didn't have a length field set.
5913 9. Added code to Exim itself and to exim_lock to test for a specific race
5914 condition that could lead to file corruption when using MBX delivery. The
5915 issue is with the lockfile that is created in /tmp. If this file is removed
5916 after a process has opened it but before that process has acquired a lock,
5917 there is the potential for a second process to recreate the file and also
5918 acquire a lock. This could lead to two Exim processes writing to the file
5919 at the same time. The added code performs the same test as UW imapd; it
5920 checks after acquiring the lock that its file descriptor still refers to
5921 the same named file.
5923 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5924 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5927 11. Added the smtp_active_hostname option. If used, this will typically be made
5928 to depend on the incoming interface address. Because $interface_address is
5929 not set up until the daemon has forked a reception process, error responses
5930 that can happen earlier (such as "too many connections") no longer contain
5933 12. If an expansion in a condition on a "warn" statement fails because a lookup
5934 defers, the "warn" statement is abandoned, and the next ACL statement is
5935 processed. Previously this caused the whole ACL to be aborted.
5937 13. Added the iplsearch lookup type.
5939 14. Added ident_timeout as a log selector.
5941 15. Added tls_certificate_verified as a log selector.
5943 16. Added a global option tls_require_ciphers (compare the smtp transport
5944 option of the same name). This controls incoming TLS connections.
5946 17. I finally figured out how to make tls_require_ciphers do a similar thing
5947 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5948 before starting the TLS session.
5950 18. Tabs are now shown as \t in -bP output.
5952 19. If the log selector return_path_on_delivery was set, Exim crashed when
5953 bouncing a message because it had too many Received: header lines.
5955 20. If two routers both had headers_remove settings, and the first one included
5956 a superfluous trailing colon, the final name in the first list and the
5957 first name in the second list were incorrectly joined into one item (with a
5958 colon in the middle).
5964 1. Added -C and -D options to the exinext utility, mainly to make it easier
5965 to include in the automated testing, but these could be helpful when
5966 multiple configurations are in use.
5968 2. The exinext utility was not formatting the output nicely when there was
5969 an alternate port involved in the retry record key, nor when there was a
5970 message id as well (for retries that were specific to a specific message
5971 and a specific host). It was also confused by IPv6 addresses, because of
5972 the additional colons they contain. I have fixed the IPv4 problem, and
5973 patched it up to do a reasonable job for IPv6.
5975 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5976 delivery, the log line now contains "pipelined" if PIPELINING was used.
5978 4. An SMTP transport process used to panic and die if the bind() call to set
5979 an explicit outgoing interface failed. This has been changed; it is now
5980 treated in the same way as a connect() failure.
5982 5. A reference to $sender_host_name in the part of a conditional expansion
5983 that was being skipped was still causing a DNS lookup. This no longer
5986 6. The def: expansion condition was not recognizing references to header lines
5987 that used bh_ and bheader_.
5989 7. Added the _cache feature to named lists.
5991 8. The code for checking quota_filecount in the appendfile transport was
5992 allowing one more file than it should have been.
5994 9. For compatibility with Sendmail, the command line option
6002 and sets the incoming protocol and host name (for trusted callers). The
6003 host name and its colon can be omitted when only the protocol is to be set.
6004 Note the Exim already has two private options, -pd and -ps, that refer to
6005 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6006 "s", but I don't think that's a major issue.
6008 10. A number of refactoring changes to the code, none of which should affect
6011 (a) The number of logging options was getting close to filling up the
6012 32-bit word that was used as a bit map. I have split them into two classes:
6013 those that are passed in the argument to log_write(), and those that are
6014 only ever tested independently outside of that function. These are now in
6015 separate 32-bit words, so there is plenty of room for expansion again.
6016 There is no change in the user interface or the logging behaviour.
6018 (b) When building, for example, log lines, the code previously used a
6019 macro that called string_cat() twice, in order to add two strings. This is
6020 not really sufficiently general. Furthermore, there was one instance where
6021 it was actually wrong because one of the argument was used twice, and in
6022 one call a function was used. (As it happened, calling the function twice
6023 did not affect the overall behaviour.) The macro has been replaced by a
6024 function that can join an arbitrary number of extra strings onto a growing
6027 (c) The code for expansion conditions now uses a table and a binary chop
6028 instead of a serial search (which was left over from when there were very
6029 few conditions). Also, it now recognizes conditions like "pam" even when
6030 the relevant support is not compiled in: a suitably worded error message is
6031 given if an attempt is made to use such a condition.
6033 11. Added ${time_interval:xxxxx}.
6035 12. A bug was causing one of the ddress fields not to be passed back correctly
6036 from remote delivery subprocesses. The field in question was not being
6037 subsequently used, so this caused to problems in practice.
6039 13. Added new log selectors queue_time and deliver_time.
6041 14. Might have fixed a bug in maildirsizefile handling that threw up
6042 "unexpected character" debug warnings, and recalculated the data
6043 unnecessarily. In any case, I expanded the warning message to give more
6046 15. Added the message "Restricted characters in address" to the statements in
6047 the default ACL that block characters like @ and % in local parts.
6049 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6050 Three changes have been made:
6052 (a) There was a serious bug; a negative response to MAIL caused the whole
6053 recipient domain to be cached as invalid, thereby blocking all messages
6054 to all local parts at the same domain, from all senders. This bug has
6055 been fixed. The domain is no longer cached after a negative response to
6056 MAIL if the sender used is not empty.
6058 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6061 (c) A new callout option, "use_sender" has been added for people who want
6062 the modified behaviour.
6068 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6071 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6072 indeed breaks things for older releases.
6074 3. Added additional logging to the case where there is a problem reading data
6075 from a filter that is running in a subprocess using a pipe, in order to
6076 try to track down a specific problem.
6078 4. Testing facility fudge: when running in the test harness and attempting
6079 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6080 getting "No route to host". Convert this to a timeout.
6082 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6085 6. Some OS don't have socklen_t but use size_t instead. This affects the
6086 fifth argument of getsockopt() amongst other things. This is now
6087 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6088 can be set for individual OS. I have set it for SunOS5, OSF1, and
6089 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6090 some earlier ones do not.
6092 7. Change 4.30/15 was not doing the test caselessly.
6094 8. The standard form for an IPv6 address literal was being rejected by address
6095 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6096 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6097 this, as well as the form without the "IPv6" on the front (but only when
6098 address literals are enabled, of course).
6100 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6102 10. Exim crashed if a message with an empty sender address specified by -f
6103 encountered a router with an errors_to setting. This could be provoked only
6104 by a command such as
6108 where an empty string was supplied; "<>" did not hit this bug.
6110 11. Installed PCRE release 4.5.
6112 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6113 remained set. It is now erased.
6115 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6116 times from message ids (which are base 36 rather than the normal 62).
6118 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6119 were being counted as actual protocol errors, and logged if the log
6120 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6121 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6122 and DATA following a set of rejected RCPTs do not count as protocol errors.
6123 In other words, Exim assumes they were pipelined, though this may not
6124 actually be the case. Of course, in all cases the client gets an
6125 appropriate error code.
6127 15. If a lookup fails in an ACL condition, a message about the failure may
6128 be available; it is used if testing the ACL cannot continue, because most
6129 such messages specify what the cause of the deferral is. However, some
6130 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6131 that caused an old message to be retained and used if a later statement
6132 caused a defer, replacing the real cause of the deferral.
6134 16. If an IP address had so many PTR records that the DNS lookup buffer
6135 was not large enough to hold them, Exim could crash while trying to process
6136 the truncated data. It now detects and logs this case.
6138 17. Further to 4.21/58, another change has been made: if (and only if) the
6139 first line of a message (the first header line) ends with CRLF, a bare LF
6140 in a subsequent header line has a space inserted after it, so as not to
6141 terminate the header.
6143 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6144 unnecessarily, used atoi() instead of strtol(), and didn't check the
6145 termination when getting file sizes from file names by regex.
6147 19. Completely re-implemented the support for maildirsize files, in the light
6148 of a number of problems with the previous contributed implementation
6149 (4.30/29). In particular:
6151 . If the quota is zero, the maildirsize file is maintained, but no quota is
6154 . If the maildir directory does not exist, it is created before any attempt
6155 to write a maildirsize file.
6157 . The quota value in the file is just a cache; if the quota is changed in
6158 the transport, the new value overrides.
6160 . A regular expression is available for excluding directories from the
6163 20. The autoreply transport checks the characters in options that define the
6164 message's headers; it allows continued headers, but it was checking with
6165 isspace() after an embedded newline instead of explicitly looking for a
6168 21. If all the "regular" hosts to which an address was routed had passed their
6169 expiry times, and had not reached their retry times, the address was
6170 bounced, even if fallback hosts were defined. Now Exim should go on to try
6173 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6174 equivalent code in the SMTP transport. Some hosts send humungous responses
6175 to HELO/EHLO, more than 1024 it seems.
6177 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6178 gives compiler warnings in some environments. I've now done it "properly",
6181 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6182 (because of problems with the built-in one) was declared to return uschar *
6183 instead of char *, causing compiler failure.
6185 25. Fixed a file descriptor leak when processing alias/forward files.
6187 26. Fixed a minor format string issue in dbfn.c.
6189 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6191 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6192 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6195 29. When a sender address is verified, it is cached, to save repeating the test
6196 when there is more than one recipient in a message. However, when the
6197 verification involves a callout, it is possible for different callout
6198 options to be set for different recipients. It is too complicated to keep
6199 track of this in the cache, so now Exim always runs a verification when a
6200 callout is required, relying on the callout cache for the optimization.
6201 The overhead is duplication of the address routing, but this should not be
6204 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6205 to be verified with callout=postmaster, and the main callout worked but the
6206 postmaster check failed, the verification correctly failed. However, if a
6207 subsequent RCPT command asked for sender verification *without* the
6208 postmaster check, incorrect caching caused this verification also to fail,
6211 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6212 it was not caching the DNS options (qualify_single, search_parents) that
6213 were used when the lookup failed. A subsequent lookup with different
6214 options therefore always gave the same answer, though there were cases
6215 where it should not have. (Example: a "domains = !$mx_any" option on a
6216 dnslookup router: the "domains" option is always processed without any
6217 widening, but the router might have qualify_single set.) Now Exim uses the
6218 cached value only when the same options are set.
6220 32. Added John Jetmore's "exipick" utility to the distribution.
6222 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6223 than a timeout (e.g. a certificate is required, and is not provided), an
6224 Exim server now closes the connection immediately. Previously it waited for
6225 the client to close - but if the client is SSL, it seems that they each
6226 wait for each other, leading to a delay before one of them times out.
6228 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6229 maintained 0.8.x compatibility because I don't think many are using it, and
6230 it is clearly obsolete.
6232 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6235 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6236 client certificate was expired. A simple patch fixes this, though I don't
6237 understand the full logic of why the verify callback is called multiple
6240 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6241 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6242 which causes problems with some clients (such as the Certicom SSL Plus
6243 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6244 disables the coutermeasure allowing Eudora to connect."
6246 38. Exim was not checking that a write() to a log file succeeded. This could
6247 lead to Bad Things if a log got too big, in particular if it hit a file
6248 size limit. Exim now panics and dies if it cannot write to a log file, just
6249 as it does if it cannot open a log file.
6251 39. Modified OS/Makefile-Linux so that it now contains
6253 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6255 The two -D definitions ensure that Exim is compiled with large file
6256 support, which makes it possible to handle log files that are bigger than
6259 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6260 instance) a domain was checked against a named list that involved a lookup,
6261 causing $domain_data to be set, then another domain was checked against the
6262 same list, then the first domain was re-checked, the value of $domain_data
6263 after the final check could be wrong. In particular, if the second check
6264 failed, it could be set empty. This bug probably also applied to
6267 41. The strip_trailing_dot option was not being applied to the address given
6268 with the -f command-line option.
6270 42. The code for reading a message's header from the spool was incrementing
6271 $received_count, but never initializing it. This meant that the value was
6272 incorrect (doubled) while delivering a message in the same process in which
6273 it was received. In the most common configuration of Exim, this never
6274 happens - a fresh exec is done - but it can happen when
6275 deliver_drop_privilege is set.
6277 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6278 it now includes up to 150 characters of the unexpected data in the log
6281 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6282 and building data strings. The size of both of these buffers was 10 000
6283 bytes - far larger than anybody would *ever* want, thought I. Needless to
6284 say, somebody hit the limit. I have increased the maximum line length to
6285 20 000 and the maximum data length of concatenated lines to 100 000. I have
6286 also fixed two bugs, because there was no checking on these buffers. Tsk,
6287 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6288 buffer is too small.
6290 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6291 lsearch lookups. Now it does.
6293 46. When parsing a route_list item in a manualroute router, a fixed-length
6294 buffer was used for the list of hosts. I made this 1024 bytes long,
6295 thinking that nobody would ever have a list of hosts that long. Wrong.
6296 Somebody had a whole pile of complicated expansion conditions, and the
6297 string was silently truncated, leading to an expansion error. It turns out
6298 that it is easier to change to an unlimited length (owing to other changes
6299 that have happened since this code was originally written) than to build
6300 structure for giving a limitation error. The length of the item that
6301 expands into the list of hosts is now unlimited.
6303 47. The lsearch lookup could not handle data where the length of text line was
6304 more than 4095 characters. Such lines were truncated, leading to shortened
6305 data being returned. It should now handle lines of any length.
6307 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6308 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6311 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6312 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6313 no longer happens in comment lines. A list of replacements is now placed
6314 at the head of all of the source files, except those whose only change is
6315 to replace PERL_COMMAND in the very first #! line.
6317 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6318 messages on the queue, with a bottom-up merge sort, using code contributed
6319 by Michael Haardt. This should make operations like -bp somewhat faster on
6320 large queues. It won't affect queue runners, except when queue_run_in_order
6323 51. Installed eximstats 1.31 in the distribution.
6325 52. Added support for SRV lookups to the dnslookup router.
6327 53. If an ACL referred to $message_body or $message_body_end, the value was not
6328 reset for any messages that followed in the same SMTP session.
6330 54. The store-handling optimization for building very long strings was not
6331 differentiating between the different store pools. I don't think this
6332 actually made any difference in practice, but I've tidied it.
6334 55. While running the routers to verify a sender address, $sender_address
6335 was still set to the sender address. This is wrong, because when routing to
6336 send a bounce to the sender, it would be empty. Therefore, I have changed
6337 it so that, while verifying a sender address, $sender_address is set to <>.
6338 (There is no change to what happens when verifying a recipient address.)
6340 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6341 target A or AAAA records (if not already returned) without resetting the
6342 qualify_single or search_parents options of the DNS resolver. These are
6343 inappropriate in this case because the targets of MX and SRV records must
6344 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6345 target that, when qualified, matched something in the local domain. These
6346 two options are now turned off when doing these lookups.
6348 57. It seems that at least some releases of Reiserfs (which does not have the
6349 concept of a fixed number of inodes) returns zero and not -1 for the
6350 number of available inodes. This interacted badly with check_spool_inodes,
6351 which assumed that -1 was the "no such thing" setting. What I have done is
6352 to check that the total number of inodes is greater than zero before doing
6353 the test of how many are available.
6355 58. When a "warn" ACL statement has a log_message modifier, the message is
6356 remembered, and not repeated. This is to avoid a lot of repetition when a
6357 message has many recipients that cause the same warning to be written.
6358 However, Exim was preserving the list of already written lines for an
6359 entire SMTP session, which doesn't seem right. The memory is now reset if a
6360 new message is started.
6362 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6363 debugging output unless log_rewrite was also set.
6365 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6366 of (int)(handle) when we know that handle contains (void *)(-1).
6368 61. The Exim daemon panic-logs an error return when it closes the incoming
6369 connection. However "connection reset by peer" seems to be common, and
6370 isn't really an error worthy of noting specially, so that particular error
6373 62. When Exim is trying to find all the local interfaces, it used to panic and
6374 die if the ioctl to get the interface flags failed. However, it seems that
6375 on at least one OS (Solaris 9) it is possible to have an interface that is
6376 included in the list of interfaces, but for which you get a failure error
6377 for this call. This happens when the interface is not "plumbed" into a
6378 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6379 failure of the "get flags" call assumes that the interface is down.
6381 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6382 makes life easier for people who are doing arithmetic on fields extracted
6383 from dates, where you often get leading zeros that should not be
6384 interpreted as octal.
6386 64. Added qualify_domain to the redirect router, to override the global
6389 65. If a pathologically long header line contained very many addresses (the
6390 report of this problem mentioned 10 000) and each of them was rewritten,
6391 Exim could use up a very large amount of memory. (It kept on making new
6392 copies of the header line as it rewrote, and never released the old ones.)
6393 At the expense of a bit more processing, the header rewriting function has
6394 been changed so that it no longer eats memory in this way.
6396 66. The generation of the Received: header has been moved from the time that a
6397 message starts to be received, to the time that it finishes. The timestamp
6398 in the Received: header should now be very close to that of the <= log
6399 line. There are two side-effects of this change:
6401 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6402 logged header lines no longer include the local Received: line, because
6403 it has not yet been created. The same applies to a copy of the message
6404 that is returned to a non-SMTP sender when a message is rejected.
6406 (b) When a filter file is tested using -bf, no additional Received: header
6407 is added to the test message. After some thought, I decided that this
6410 This change does not affect the value of $received_for. It is still set
6411 after address rewriting, but before local_scan() is called.
6413 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6415 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6416 gave an unhelpful panic error message, and a defer error. I have managed to
6417 change this behaviour so that it now rejects any supplied certificate,
6418 which seems right, as the list of acceptable certificates is empty.
6420 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6421 gave an unhelpful defer error. I have not managed to make this reject any
6422 supplied certificates, but the error message it gives is "no certificate
6423 supplied", which is not helpful.
6425 70. exigrep's output now also includes lines that are not associated with any
6426 message, but which match the given pattern. Implemented by a patch from
6427 Martin Sluka, which also tidied up the Perl a bit.
6429 71. Recipient callout verification, like sender verification, was using <> in
6430 the MAIL FROM command. This isn't really the right thing, since the actual
6431 sender may affect whether the remote host accepts the recipient or not. I
6432 have changed it to use the actual sender in the callout; this means that
6433 the cache record is now keyed on a recipient/sender pair, not just the
6434 recipient address. There doesn't seem to be a real danger of callout loops,
6435 since a callout by the remote host to check the sender would use <>.
6436 [SEE ABOVE: changed after hitting problems.]
6438 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6439 temporary errors. However, in the case of such a code being given after
6440 the end of a data transmission (i.e. after ".") Exim was failing to write
6441 a retry record for the message. (Yes, there was some broken host that was
6442 actually sending 8xx at this point.)
6444 73. An unknown lookup type in a host list could cause Exim to panic-die when
6445 the list was checked. (An example that provoked this was putting <; in the
6446 middle of a list instead of at the start.) If this happened during a DATA
6447 ACL check, a -D file could be left lying around. This kind of configuration
6448 error no longer causes Exim to die; instead it causes a defer error. The
6449 incident is still logged to the main and panic logs.
6451 74. Buglet left over from Exim 3 conversion. The message "too many messages
6452 in one connection" was written to the rejectlog but not the mainlog, except
6453 when address rewriting (yes!) was being logged.
6455 75. Added write_rejectlog option.
6457 76. When a system filter was run not as root (that is, when system_filter_user
6458 was set), the values of the $n variables were not being returned to the
6459 main process; thus, they were not subsequently available in the $sn
6462 77. Added +return_path_on_delivery log selector.
6464 78. A connection timeout was being treated differently from recipients deferred
6465 when testing hosts_max_try with a message that was older than the host's
6466 retry timeout. (The host should not be counted, thus allowing all hosts to
6467 be tried at least once before bouncing.) This may have been the cause of an
6468 occasionally reported bug whereby a message would remain on the queue
6469 longer than the retry timeout, but would be bounced if a delivery was
6470 forced. I say "may" because I never totally pinned down the problem;
6471 setting up timeout/retry tests is difficult. See also the next item.
6473 79. The ultimate address timeout was not being applied to errors that involved
6474 a combination of host plus message (for example, a timeout on a MAIL
6475 command). When an address resolved to a number of possible hosts, and they
6476 were not all tried for each delivery (e.g. because of hosts_max_try), a
6477 message could remain on the queue longer than the retry timeout.
6479 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6482 81. Fixed an obscure SMTP outgoing bug which required at least the following
6483 conditions: (a) there was another message waiting for the same server;
6484 (b) the server returned 5xx to all RCPT commands in the first message so
6485 that the message was not completed; (c) the server dropped the connection
6486 or gave a negative response to the RSET that Exim sends to abort the
6487 transaction. The observed case was a dropped connection after DATA that had
6488 been sent in pipelining mode. That is, the server had advertised PIPELINING
6489 but was not implementing it correctly. The effect of the bug was incorrect
6490 behaviour, such as trying another host, and this could lead to a crash.
6496 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6497 and daemon.c were passed as pointers to ints; they should have been
6498 pointers to socklen_t variables (which are typically unsigned ints).
6500 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6503 3. Fixed a really odd bug that affected only the testing scheme; patching a
6504 certain fixed string in the binary changed the value of another string that
6505 happened to be identical to the end of the original first string.
6507 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6508 name", it returns that address as the IP address. On some operating
6509 systems (e.g. Solaris), it also passes back the IP address string as the
6510 "host name". However, on others (e.g. Linux), it passes back an empty
6511 string. Exim wasn't checking for this, and was changing the host name to an
6512 empty string, assuming it had been canonicalized.
6514 5. Although rare, it is permitted to have more than one PTR record for a given
6515 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6516 all the names associated with an address, because they do in Solaris.
6517 However, it seems that they do not in Linux for data that comes from the
6518 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6519 I found this out when I moved to a new Linux workstation and tried to run
6520 the Exim test suite.
6522 To get round this problem I have changed the code so that it now does its
6523 own call to the DNS to look up PTR records when searching for a host name.
6524 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6525 addresses that are only in /etc/hosts are still found.
6527 This behaviour is, however, controlled by an option called host_lookup_
6528 order, which defaults to "bydns:byaddr". If people want to use the other
6529 order, or indeed, just use one or the other means of lookup, they can
6530 specify it in this variable.
6532 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6533 some operating systems, this comes back from gethostbyaddr() as an empty
6534 string, and this is what Exim used to test for. However, it seems that in
6535 other systems, "." is yielded. Exim now tests for this case too.
6537 7. The values of check_spool_space and check_log_space are now held internally
6538 as a number of kilobytes instead of an absolute number of bytes. If a
6539 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6540 kilobyte. This means that much larger values can be stored.
6542 8. Exim monitor: an attempt to get the action menu when not actually pointing
6543 at a message produces an empty menu entitled "No message selected". This
6544 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6545 no entries in it ("Shell widget menu has zero width and/or height"). So I
6546 have added a single, blank menu entry in this case.
6548 9. Added ${quote_local_part.
6550 10. MIME decoding is now applied to the contents of Subject: header lines when
6553 11. Now that a reference to $sender_host_address automatically causes a reverse
6554 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6555 host lookup before query-style lookups in lists that might use this
6556 variable. This has therefore been abolished, and the "net-" prefix is no
6557 longer necessary for query-style lookups.
6559 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6560 have been a typo for LFLAGS, so it has been changed.
6562 13. The install script calls Exim with "-C /dev/null" in order to find the
6563 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6564 to be output. However, since Exim outputs its version number before the
6565 error, it didn't break the script. It just looked ugly. I fixed this by
6566 always allowing "-C /dev/null" if the caller is root.
6568 14. Ignore overlarge ACL variable number when reading spool file - insurance
6569 against a later release with more variables having written the file.
6571 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6572 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6573 this, as well as the form without the "IPv6" on the front.
6575 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6576 OS/Makefile-Darwin file.
6578 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6579 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6581 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6582 variable. However, some OS use ints for inodes. I've added cast to long int
6583 to get rid of the compiler warning.
6585 19. I had forgotten to lock out "/../" in configuration file names when
6586 ALT_CONFIG_PREFIX was set.
6588 20. Routers used for verification do not need to specify transports. However,
6589 if such a router generated a host list, and callout was configured, Exim
6590 crashed, because it could not find a port number from the (non-existent)
6591 transport. It now assumes port 25 in this circumstance.
6593 21. Added the -t option to exigrep.
6595 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6596 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6597 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6598 them is set, LOOKUP_LSEARCH is forced.
6600 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6602 24. Added sender and host information to the "rejected by local_scan()" log
6603 line; previously there was no indication of these.
6605 25. Added .include_if_exists.
6607 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6608 Linux. It turns out that not all file systems support this. Apparently some
6609 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6610 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6611 not supported on the file descriptor, is now ignored when Exim is trying to
6612 sync a directory. This applies only to Linux.
6614 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6616 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6617 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6620 29. Added support for maildirsize files from supplied patch (modified a bit).
6622 30. The use of :fail: followed by an empty string could lead Exim to respond to
6623 sender verification failures with (e.g.):
6625 550 Verification failed for <xxx>
6626 550 Sender verify failed
6628 where the first response line was missing the '-' that indicates it is not
6629 the final line of the response.
6631 31. The loop for finding the name of the user that called Exim had a hardwired
6632 limit of 10; it now uses the value of finduser_retries, which is used for
6633 all other user lookups.
6635 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6638 33. Exim was neglecting to zero errno before one call of strtol() when
6639 expanding a string and expecting an integer value. On some systems this
6640 resulted in spurious "integer overflow" errors. Also, it was casting the
6641 result into an int without checking.
6643 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6644 did not work. The code looks as if it has *never* worked, though it appears
6645 to have been documented since at least release 1.62. I have made it work.
6647 35. The "timeout_DNS" error in retry rules, also documented since at least
6648 1.62, also never worked. As it isn't clear exactly what this means, and
6649 clearly it isn't a major issue, I have abolished the feature by treating it
6650 as "timeout", and writing a warning to the main and panic logs.
6652 36. The display of retry rules for -brt wasn't always showing the error code
6655 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6656 timeout_connect_A, timeout_connect_MX.
6658 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6659 to the empty sender.
6661 39. The daemon was not analysing the content of -oX till after it had closed
6662 stderr and disconnected from the controlling terminal. This meant that any
6663 syntax errors were only noted on the panic log, and the return code from
6664 the command was 0. By re-arranging the code a little, I've made the
6665 decoding happen first, so such errors now appear on stderr, and the return
6666 code is 1. However, the actual setting up of the sockets still happens in
6667 the disconnected process, so errors there are still only recorded on the
6670 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6671 connections (as happens on some IP stacks) was logged at start up time as
6672 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6673 it from "IPv6 and IPv4", which means that two separate sockets are being
6676 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6677 says whether AF_INET or AF_INET6 was passed as an argument.
6679 42. Exiwhat output was messed up when time zones were included in log
6682 43. Exiwhat now gives more information about the daemon's listening ports,
6683 and whether -tls-on-connect was used.
6685 44. The "port" option of the smtp transport is now expanded.
6687 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6688 silently ignored. Now an error message is written to the main and panic
6691 46. There's a new ACL modifier called "logwrite" which writes to a log file
6692 as soon as it is encountered.
6694 47. Added $local_user_uid and $local_user_gid at routing time.
6696 48. Exim crashed when trying to verify a sender address that was being
6699 49. Exim was recognizing only a space character after ".include". It now also
6700 recognizes a tab character.
6702 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6703 extracting the relevant information from the specification. The man page no
6704 longer contains scrambled data for the -d option, and I've added a section
6705 at the front about calling Exim under different names.
6707 51. Added "extra_headers" argument to the "mail" command in filter files.
6709 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6712 53. Installed eximstats 1.29.
6714 54. Added transport_filter_timeout as a generic transport option.
6716 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6717 Cc: header lines. This was required by RFC 822, but it not required by RFC
6720 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6721 incoming messages that did not have them. Now it does so only if the
6722 message originates locally, that is, if there is no associated remote host
6723 address. When Resent- header lines are present, this applies to the Resent-
6724 lines rather than the non-Resent- lines.
6726 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6727 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6729 58. Messages for configuration errors now include the name of the main
6730 configuration file - useful now that there may be more than one file in a
6731 list (.included file names were always shown).
6733 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6734 for those rare installations that do not start the daemon as root or run it
6735 setuid root. I've cut out the call to initgroups() if the daemon is not
6738 60. The Exim user and group can now be bound into the binary as text strings
6739 that are looked up at the start of Exim's processing.
6741 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6743 62. Added $mailstore_basename variable.
6745 63. Installed patch to sieve.c from Michael Haardt.
6747 64. When Exim failed to open the panic log after failing to open the main log,
6748 the original message it was trying to log was written to stderr and debug
6749 output, but if they were not available (the usual case in production), it
6750 was lost. Now it is written to syslog before the two lines that record the
6751 failures to open the logs.
6753 65. Users' Exim filters run in subprocesses under the user's uid. It is
6754 possible for a "deliver" command or an alias in a "personal" command to
6755 provoke an address rewrite. If logging of address rewriting is configured,
6756 this fails because the process is not running as root or exim. There may be
6757 a better way of dealing with this, but for the moment (because 4.30 needs
6758 to be released), I have disabled address rewrite logging when running a
6759 filter in a non-root, non-exim process.
6765 1. The buildconfig auxiliary program wasn't quoting the value set for
6766 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6767 not defined. This bug was masked in 4.22 by the effect that was fixed in
6770 2. Some messages that were rejected after a message id was allocated were
6771 shown as "incomplete" by exigrep. It no longer does this for messages that
6772 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6774 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6775 have allow_domain_literals set, the ID did not get logged in the <= line.
6776 Domain literals are now always recognized in Message-ID: header lines.
6778 4. The first argument for a ${extract expansion item is the key name or field
6779 number. Leading and trailing spaces in this item were not being ignored,
6780 causing some misleading effects.
6782 5. When deliver_drop_privilege was set, single queue runner processes started
6783 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6784 same command in the process it spins off) were not dropping privilege.
6786 6. When the daemon running as "exim" started a queue runner, it always
6787 re-executed Exim in the spun-off process. This is a waste of effort when
6788 deliver_drop_privilege is set. The new process now just calls the
6789 queue-runner function directly.
6795 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6798 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6799 ignored. Though the use of -oP was forcing the writing of a pid file, it
6800 was always written to the default place.
6802 3. If the message "no IP address found for host xxxx" is generated during
6803 incoming verification, it is now followed by identification of the incoming
6804 connection (so you can more easily find what provoked it).
6806 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6808 5. Added some features to "harden" Exim a bit more against certain attacks:
6810 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6811 be put in Local/Makefile. This is like the never_users runtime option,
6812 but it cannot be overridden. The default setting is "root".
6814 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6815 prefix string with which any file named in a -C command line option
6818 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6819 is retained for -C and -D only if the caller of Exim is root. Without
6820 it, the exim user may also use -C and -D and retain privilege.
6822 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6823 command line option is disabled.
6825 6. Macro names set by the -D option must start with an upper case letter, just
6826 like macro names defined in the configuration file.
6828 7. Added "dereference=" facility to LDAP.
6830 8. Two instances of the typo "uknown" in the source files are fixed.
6832 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6833 the Configure-Makefile script screwed up while processing it.
6835 10. Incorporated PCRE 4.4.
6837 11. The SMTP synchronization check was not operating right at the start of an
6838 SMTP session. For example, it could not catch a HELO sent before the client
6839 waited for the greeting. There is now a check for outstanding input at the
6840 point when the greeting is written. Because of the duplex, asynchronous
6841 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6842 way, but not yet received, when the check is performed.
6844 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6845 on TCP/IP sockets, because this apparently causes some broken clients to
6848 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6849 unchanged) from the Cygwin maintainer.
6851 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6852 was supported instead of testing for mbx. Effectively a typo.
6854 15. The spa authenticator server code was not checking that the input it
6855 received was valid base64.
6857 16. The debug output line for the "set" modifier in ACLs was not showing the
6858 name of the variable that was being set.
6860 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6862 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6863 lookup on its own. Something else was needed to trigger the lookup. For
6864 example, a match in host_lookup or the need for a host name in a host list.
6865 Now, if $sender_host_name is referenced and the host name has not yet been
6866 looked up, a lookup is performed. If the lookup fails, the variable remains
6867 empty, and $host_lookup_failed is set to "1".
6869 19. Added "eqi" as a case-independent comparison operator.
6871 20. The saslauthd authentication condition could segfault if neither service
6872 nor realm was specified.
6874 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6875 error message that was logged was misleading, and incoming SMTP
6876 connections were dropped. The message is now more accurate, and temporary
6877 errors are given to SMTP connections.
6879 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6880 (except RSET) with a 421 error, until QUIT is received. However, it was
6881 failing to send a response to QUIT.
6883 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6884 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6885 ACL is now run after the helo_try_verify_hosts code.
6887 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6888 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6889 case-independent, so other case variants are also recognized). Apparently
6890 some systems use these upper case variants.
6892 25. If more than two messages were waiting for the same host, and a transport
6893 filter was specified for the transport, Exim sent two messages over the
6894 same TCP/IP connection, and then failed with "socket operation on non-
6895 socket" when it tried to send the third.
6897 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6899 27. The extern definition of crypt16() in expand.c was not being excluded when
6900 the OS had its own crypt16() function.
6902 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6903 as a preferred synonym for return_size_limit, both as an option and as an
6906 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6908 30. Changed the default configuration ACL to relax the local part checking rule
6909 for addresses that are not in any local domains. For these addresses,
6910 slashes and pipe symbols are allowed within local parts, but the sequence
6911 /../ is explicitly forbidden.
6913 31. SPA server authentication was not clearing the challenge buffer before
6916 32. log_message in a "warn" ACL statement was writing to the reject log as
6917 well as to the main log, which contradicts the documentation and doesn't
6918 seem right (because no rejection is happening). So I have stopped it.
6920 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6921 However, I am unable to do any testing of this.
6923 34. Fixed an infelicity in the appendfile transport. When checking directories
6924 for a mailbox, to see if any needed to be created, it was accidentally
6925 using path names with one or more superfluous leading slashes; tracing
6926 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6928 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6929 contents are added to the log line that is written for every discarded
6930 recipient. (Previously a log_message setting was ignored.)
6932 36. The ${quote: operator now quotes the string if it is empty.
6934 37. The install script runs exim in order to find its version number. If for
6935 some reason other than non-existence or emptiness, which it checks, it
6936 could not run './exim', it was installing it with an empty version number,
6937 i.e. as "exim-". This error state is now caught, and the installation is
6940 38. An argument was missing from the function that creates an error message
6941 when Exim fails to connect to the socket for saslauthd authentication.
6942 This could cause Exim to crash, or give a corrupted message.
6944 39. Added isip, isip4, and isip6 to ${if conditions.
6946 40. The ACL variables $acl_xx are now saved with the message, and can be
6947 accessed later in routers, transports, and filters.
6949 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6950 strings in the file are not string-expanded.
6952 42. If a MAIL command specified a SIZE value that was too large to fit into an
6953 int variable, the check against message_size_limit failed. Such values are
6954 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6955 day this will have to be increased, but I don't think I want to be around
6956 when emails are that large.
6963 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6964 iconv() is not standard in FreeBSD.
6966 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6967 IPv6 enabled. The observed symptom was a segmentation fault on return from
6968 the function os_common_find_running_interfaces() in src/os.c.
6970 3. In the check_special_case() function in daemon.c I had used "errno" as an
6971 argument name, which causes warnings on some systems. This was basically a
6972 typo, since it was named "eno" in the comments!
6974 4. The code that waits for the clock to tick (at a resolution of some fraction
6975 of a second) so as to ensure message-id uniqueness was always waiting for
6976 at least one whole tick, when it could have waited for less. [This is
6977 almost certainly not relevant at current processor speeds, where it is
6978 unlikely to ever wait at all. But we try to future-proof.]
6980 5. The function that sleeps for a time interval that includes fractions of a
6981 second contained a race. It did not block SIGALRM between setting the
6982 timer, and suspending (a couple of lines later). If the interval was short
6983 and the sigsuspend() was delayed until after it had expired, the suspension
6984 never ended. On busy systems this could lead to processes getting stuck for
6987 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6988 process, before it forks any delivery processes. The open lookup caching
6989 mechanism meant that the open file or database connection was passed into
6990 the delivery process. The problem was that delivery processes always tidy
6991 up cached lookup data. This could cause a problem for the next delivery
6992 process started by the queue runner, because the external queue runner
6993 process does not know about the closure. So the next delivery process
6994 still has data in the lookup cache. In the case of a file lookup, there was
6995 no problem because closing a file descriptor in a subprocess doesn't affect
6996 the parent. However, if the lookup was caching a connection to a database,
6997 the connection was closed, and the second delivery process was likely to
6998 see errors such as "PGSQL: query failed: server closed the connection
6999 unexpectedly". The problem has been fixed by closing all cached lookups
7000 in a queue runner before running a delivery process.
7002 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7003 seem to have the "const" qualifier which it has on other OS. I've
7006 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7007 *of the same type* (client or server) with the same public name that an
7008 error should be diagnosed.
7010 9. When Exim looked up a host name for an IP address, but failed to find the
7011 original IP address when looking up the host name (a safety check), it
7012 output the message "<ip address> does not match any IP for NULL", which was
7013 confusing, to say the least. The bug was that the host name should have
7014 appeared instead of "NULL".
7016 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7017 user that is built into the binary, and the -C or -D options is used, root
7018 privilege is dropped before the configuration file is read. In addition,
7019 logging is switched to stderr instead of the normal log files. If the
7020 configuration then re-defines the Exim user, the unprivileged environment
7021 is probably not what is expected, so Exim logs a panic warning message (but
7024 However, if deliver_drop_privilege is set, the unprivileged state may well
7025 be exactly what is intended, so the warning has been cut out in that case,
7026 and Exim is allowed to try to write to its normal log files.
7032 1. smtp_return_error_details was not giving details for temporary sender
7033 or receiver verification errors.
7035 2. Diagnose a configuration error if two authenticators have the same public
7038 3. Exim used not to create the message log file for a message until the first
7039 delivery attempt. This could be confusing when incoming messages were held
7040 for policy or load reasons. The message log file is now created at the time
7041 the message is received, and an initial "Received" line is written to it.
7043 4. The automatically generated man page for command line options had a minor
7044 bug that caused no ill effects; however, a more serious problem was that
7045 the procedure for building the man page automatically didn't always
7046 operate. Consequently, release 4.20 contains an out-of-date version. This
7047 shouldn't happen again.
7049 5. When building Exim with embedded Perl support, the script that builds the
7050 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7051 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7053 6. The freeze_tell option was not being used for messages that were frozen on
7054 arrival, either by an ACL or by local_scan().
7056 7. Added the smtp_incomplete_transaction log selector.
7058 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7059 was accepting AUTH without a new EHLO.
7061 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7062 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7065 10. Logging of TCP/IP connections (when configured) now happens in the main
7066 daemon process instead of the child process, so that the TCP/IP connection
7067 count is more accurate (but it can never be perfect).
7069 11. The use of "drop" in a nested ACL was not being handled correctly in the
7070 outer ACL. Now, if condition failure induced by the nested "drop" causes
7071 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7072 or "require"), the connection is dropped.
7074 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7075 that yield "discard" can now be used with an "accept" or a "discard" verb,
7076 but an error is generated for any others (because I can't see a useful way
7077 to define what should happen).
7079 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7080 are now processed in the same way as lines in the Exim configuration file.
7081 In particular, continuation lines are supported.
7083 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7085 15. Added -ti meaning -t -i.
7087 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7088 domains, and warn by logging if others are found.
7090 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7091 returned from GIFCONF when Exim is trying to find the list of interfaces on
7092 a host. The code in os.c has been modified to copy each ifreq to an aligned
7093 structure in all cases.
7095 Also, in some cases, the returned ifreq's were being copied to a 'struct
7096 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7097 means the last couple of bytes of an IPv6 address could be chopped if the
7098 ifreq contained only a normal sockaddr (14 bytes storage).
7100 18. Named domain lists were not supported in the hosts_treat_as_local option.
7101 An entry such as +xxxx was not recognized, and was treated as a literal
7104 19. Ensure that header lines added by a DATA ACL are included in the reject log
7105 if the ACL subsequently rejects the message.
7107 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7108 MD5 (which is deprecated).
7110 21. When testing a filter file using -bf, Exim was writing a message when it
7111 took the sender from a "From " line in the message, but it was not doing so
7112 when it took $return_path from a Return-Path: header line. It now does.
7114 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7115 with a valid header line field name (a series of printing characters
7116 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7118 23. Changed "disc" in the source to "disk" to conform to the documentation and
7119 the book and for uniformity.
7121 24. Ignore Sendmail's -Ooption=value command line item.
7123 25. When execve() failed while trying to run a command in a pipe transport,
7124 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7125 could be confused with a return value of 69 from the command itself. This
7126 has been changed to 127, the value the shell returns if it is asked to run
7127 a non-existent command. The wording for the related log line suggests a
7128 non-existent command as the problem.
7130 26. If received_header_text expands to an empty string, do not add a Received:
7131 header line to the message. (Well, it adds a token one on the spool, but
7132 marks it "old" so that it doesn't get used or transmitted.)
7134 27. Installed eximstats 1.28 (addition of -nt option).
7136 28. There was no check for failure on the call to getsockname() in the daemon
7137 code. This can fail if there is a shortage of resources on the system, with
7138 ENOMEM, for example. A temporary error is now given on failure.
7140 29. Contrary to the C standard, it seems that in some environments, the
7141 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7142 program. Exim now does this explicitly; it affects the formatting of
7143 timestamps using strftime().
7145 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7146 complaints. I've now initialized all the variables, to avoid this.
7148 32. Header lines added by a system filter were not being "seen" during
7149 transport-time rewrites.
7151 33. The info_callback() function passed to OpenSSL is set up with type void
7152 (*)(SSL *, int, int), as described somewhere. However, when calling the
7153 function (actually a macro) that sets it up, the type void(*)() is
7154 expected. I've put in a cast to prevent warnings from picky compilers.
7156 34. If a DNS black list lookup found a CNAME record, but there were no A
7157 records associated with the domain it pointed at, Exim crashed.
7159 35. If a DNS black list lookup returned more than one A record, Exim ignored
7160 all but the first. It now scans all returned addresses if a particular IP
7161 value is being sought. In this situation, the contents of the
7162 $dnslist_value variable are a list of all the addresses, separated by a
7165 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7166 to accept a host name and all its aliases if the forward lookup for any of
7167 them yielded the IP address of the incoming connection. Now it accepts only
7168 those names whose forward lookup yields the correct IP address. Any other
7169 names are discarded. This closes a loophole whereby a rogue DNS
7170 administrator could create reverse DNS records to break through a
7171 wildcarded host restriction in an ACL.
7173 37. If a user filter or a system filter that ran in a subprocess used any of
7174 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7175 the wrong values were passed to the pipe command ($thisaddress had the
7176 value of $0, $0 had the value of $1, etc). This bug was introduced by
7177 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7179 38. Improved the line breaking for long SMTP error messages from ACLs.
7180 Previously, if there was no break point between 40 and 75 characters, Exim
7181 left the rest of the message alone. Two changes have been made: (a) I've
7182 reduced the minimum length to 35 characters; (b) if it can't find a break
7183 point between 35 and 75 characters, it looks ahead and uses the first one
7184 that it finds. This may give the occasional overlong line, but at least the
7185 remaining text gets split now.
7187 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7188 file descriptors might be low, and that setting 1000 would always raise it.
7189 It turns out that in some environments, the limit is already over 1000 and
7190 that lowering it causes trouble. So now Exim takes care not to decrease it.
7192 40. When delivering a message, the value of $return_path is set to $sender_
7193 address at the start of routing (routers may change the value). By an
7194 oversight, this default was not being set up when an address was tested by
7195 -bt or -bv, which affected the outcome if any router or filter referred to
7198 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7199 log only when "message" or "log_message" are set. However, if one of the
7200 conditions was an address verification, or a call to a nested ACL, the
7201 messages generated by the underlying test were being passed through. This
7202 no longer happens. The underlying message is available in $acl_verify_
7203 message for both "message" and "log_message" expansions, so it can be
7204 passed through if needed.
7206 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7207 new expansion $bh_ to give the encoded byte string without charset
7208 translation. Translation happens only if iconv() is available; HAVE_ICONV
7209 indicates this at build time. HEADERS_CHARSET gives the charset to
7210 translate to; headers_charset can change it in the configuration, and
7211 "headers charset" can change it in an individual filter file.
7213 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7214 that creates RFC 2047 encoded "words" labels them as that charset instead
7215 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7216 expansion operator; (ii) when Exim creates a From: line for a local
7217 message; (iii) when a header line is rewritten to include a "phrase" part.
7219 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7220 buggy, causing it to skip the first lines of messages whose message ID
7221 ended in 'D'. This would not have bitten before Exim release 4.14, because
7222 message IDs were unlikely to end in 'D' before then. The effect was to have
7223 incorrect size information for certain domains.
7225 45. #include "config.h" was missing at the start of the crypt16.c module. This
7226 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7229 46. If there was a timeout during a "random" callout check, Exim treated it as
7230 a failure of the random address, and carried on sending RSET and the real
7231 address. If the delay was just some slowness somewhere, the response to the
7232 original RCPT would be taken as a response to RSET and so on, causing
7233 mayhem of various kinds.
7235 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7236 when I implemented it. It didn't allow for the fact that some option values
7237 may legitimately be negative (e.g. size_addition), and it didn't even do
7238 the right test for positive values.
7240 48. Domain names in DNS records are case-independent. Exim always looks them up
7241 in lower case. Some resolvers return domain names in exactly the case they
7242 appear in the zone file, that is, they may contain uppercase letters. Not
7243 all resolvers do this - some return always lower case. Exim was treating a
7244 change of case by a resolver as a change of domain, similar to a widening
7245 of a domain abbreviation. This triggered its re-routing code and so it was
7246 trying to route what was effectively the same domain again. This normally
7247 caused routing to fail (because the router wouldn't handle the domain
7248 twice). Now Exim checks for this case specially, and just changes the
7249 casing of the domain that it ultimately uses when it transmits the message
7252 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7255 50. If a filter generated a file delivery with a non-absolute name (possible if
7256 no home directory exists for the router), the forbid_file option was not
7259 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7260 the existing equality matching.
7262 52. Exim was using ints instead of ino_t variables in some places where it was
7263 dealing with inode numbers.
7265 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7266 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7267 called TMPDIR, and if it finds it is different, it changes its value.
7269 54. The smtp_printf() function is now made available to local_scan() so
7270 additional output lines can be written before returning. There is also an
7271 smtp_fflush() function to enable the detection of a dropped connection.
7272 The variables smtp_input and smtp_batched_input are exported to
7275 55. Changed the default runtime configuration: the message "Unknown user"
7276 has been removed from the ACL, and instead placed on the localuser router,
7277 using the cannot_route_message feature. This means that any verification
7278 failures that generate their own messages won't get overridden. Similarly,
7279 the "Unrouteable address" message that was in the ACL for unverifiable
7280 relay addresses has also been removed.
7282 56. Added hosts_avoid_esmtp to the smtp transport.
7284 57. The exicyclog script was not checking for the esoteric option
7285 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7286 will work only if exicyclog is run under the appropriate euid.
7288 58. Following a discussion on the list, the rules by which Exim recognises line
7289 endings on incoming messages have been changed. The -dropcr and drop_cr
7290 options are now no-ops, retained only for backwards compatibility. The
7291 following line terminators are recognized: LF CRLF CR. However, special
7292 processing applies to CR:
7294 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7295 nor a local message in the state where . is a terminator.
7297 (ii) If a bare CR is encountered in a header line, an extra space is added
7298 after the line terminator so as not to end the header. The reasoning
7299 behind this is that bare CRs in header lines are most likely either
7300 to be mistakes, or people trying to play silly games.
7302 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7303 was being incorrectly given as 18 bytes larger than it should have been.
7304 This is a VOB (very old bug).
7306 60. This may never have affected anything current, but just in case it has:
7307 When the local host is found other than at the start of a list of hosts,
7308 the local host, those with the same MX, and any that follow, are discarded.
7309 When the list in question was part of a longer list of hosts, the following
7310 hosts (not currently being processed) were also being discarded. This no
7311 longer happens. I'm not sure if this situation could ever has previously
7314 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7317 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7318 header. This is something that is recommended in a new Internet Draft, and
7319 is something that is documented as being done by Sendmail. There are two
7320 possible values. For messages generated by the autoreply transport, Exim
7323 Auto-Submitted: auto-replied
7325 whereas for all other generated messages (e.g. bounces) it adds
7327 Auto-Submitted: auto-generated
7329 63. The "personal" condition in filters now includes a test for the
7330 Auto-Submitted: header. If it contains the string "auto-" the message it
7331 not considered personal.
7333 64. Added rcpt_include_affixes as a generic transport option.
7335 65. Added queue_only_override (default true).
7337 66. Added the syslog_duplication option.
7339 67. If what should have been the first header line of a message consisted of
7340 a space followed by a colon, Exim was mis-interpreting it as a header line.
7341 It isn't of course - it is syntactically invalid and should therefore be
7342 treated as the start of the message body. The misbehaviour could have
7343 caused a number of strange effects, including loss of data in subsequent
7344 header lines, and spool format errors.
7346 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7347 client host had authenticated. This control can now be exercised by an ACL
7348 for more flexibility.
7350 69. By default, callouts do not happen when testing with -bh. There is now a
7351 variant, -bhc, which does actually run the callout code, including
7352 consulting and updating the callout cache.
7354 70. Added support for saslauthd authentication, courtesy of Alexander
7357 71. If statvfs() failed on the spool or log directories while checking their
7358 size for availability, Exim confusingly gave the error "space shortage".
7359 Furthermore, in debugging mode it crashed with a floating point exception.
7360 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7361 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7362 serious problem, Exim now writes to the main and panic logs when this
7363 happens, with details of the failure. It then refuses to accept the
7364 incoming message, giving the message "spool directory problem" or "log
7365 directory problem" with a 421 code for SMTP messages.
7367 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7368 0, 1, and 2 exist, because some OS complain for execs without them (see
7369 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7370 descriptors. However, the code omitted to check that the open succeeded,
7371 causing mysterious errors if for some reason the permissions on /dev/null
7372 got screwed. Now Exim writes a message to the main and panic logs, and
7373 bombs out if it can't open /dev/null.
7375 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7376 interact so that it is all more flexible. It is supposed to remain
7377 backwards compatible. Also added extra_local_interfaces.
7379 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7380 to bomb out with an assertion failure - to the client this appears as a
7381 connection drop. This problem occurs in the part of the code that was taken
7382 from the Samba project. Fortunately, the assertion is in a very simple
7383 function, so I have fixed this by reproducing the function inline in the
7384 one place where it is called, and arranging for authentication to fail
7385 instead of killing the process with assert().
7387 75. The SPA client code was not working when the server requested OEM rather
7388 than Unicode encoding.
7390 76. Added code to make require_files with a specific uid setting more usable in
7391 the case where statting the file as root fails - usually a non-root-mounted
7392 NFS file system. When this happens and the failure is EACCES, Exim now
7393 forks a subprocess and does the per-uid checking as the relevant uid.
7395 77. Added process_log_path.
7397 78. If log_file_path was not explicitly set, a setting of check_log_space or
7398 check_log_inodes was ignored.
7400 79. If a space check for the spool or log partitions fails, the incident is now
7401 logged. Of course, in the latter case the data may get lost...
7403 80. Added the %p formatting code to string_format() so that it can be used to
7404 print addresses in debug_print(). Adjusted all the address printing in the
7405 debugging in store.c to use %p rather than %d.
7407 81. There was a concern that a line of code in smtp_in.c could overflow a
7408 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7409 initially expressed, the concern was not well-founded, because trailing
7410 spaces are removed early. However, if the trailing spaces were followed by
7411 a NULL, they did not get removed, so the overflow was possible. Two fixes
7414 (a) I re-wrote the offending code in a cleaner fashion.
7415 (b) If an incoming SMTP command contains a NULL character, it is rejected
7418 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7419 runs initgroups(), so that if the Exim user is in any additional groups,
7420 they will be used during message reception.
7426 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob