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.
29 JH/01 Remove code calling the customisable local_scan function, unless a new
30 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
32 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
33 non-signal-safe functions being used.
35 JH/03 Bug 2269: When presented with a received message having a stupidly large
36 number of DKIM-Signature headers, disable DKIM verification to avoid
37 a resource-consumption attack. The limit is set at twenty.
39 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
40 report of oldest_pass in ${authres } in consequence, and separate out
41 some descriptions of reasons for verification fail.
43 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
44 files in the spool were present and unlocked. A queue-runner could spot
45 them, resulting in a duplicate delivery. Fix that by doing the unlock
46 after the unlink. Investigation by Tim Stewart. Take the opportunity to
47 add more error-checking on spoolfile handling while that code is being
50 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
51 No known attacks, no CVE, this is defensive hardening.
53 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
54 a queue-runner could start a delivery while other operations were ongoing.
55 Cutthrough delivery was a common victim, resulting in duplicate delivery.
56 Found and investigated by Tim Stewart. Fix by using the open message data
57 file handle rather than opening another, and not locally closing it (which
58 releases a lock) for that case, while creating the temporary .eml format
59 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
61 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
62 $sender_verify_failure/$recipient_verify_failure to "random".
64 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
67 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
68 Previously this would segfault.
70 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
73 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
74 like zero, since the resolver should be doing this for us, But we need one
75 as a CNAME but no MX presence gets the CNAME returned; we need to check
76 that doesn't point to an MX to declare it "no MX returned" rather than
77 "error, loop". A new main option is added so the older capability of
78 following some limited number of chain links is maintained.
80 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
82 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
83 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
84 now-deprecated earlier definitions used only specified the range up to TLS
85 1.2 (in the older-version library docs).
87 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
89 JH/15 Rework TLS client-side context management. Stop using a global, and
90 explicitly pass a context around. This enables future use of TLS for
91 connections to service-daemons (eg. malware scanning) while a client smtp
92 connection is using TLS; with cutthrough connections this is quite likely.
94 JH/16 Fix ARC verification to do AS checks in reverse order.
96 JH/17 Support a "tls" option on the ${readsocket } expansion item.
98 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
99 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
100 Previously the "utf8" would be re-prepended for every additional message.
102 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
103 Previously thery were accepted, resulting in issues when attempting to
104 forward messages to a non-supporting MTA.
106 PP/02 Let -n work with printing macros too, not just options.
108 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
109 one parent address was copied, and bogus data was used at delivery-logging
110 time. Either a crash (after delivery) or bogus log data could result.
111 Discovery and analysis by Tim Stewart.
113 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
114 Previously if the string ended mid-character, we did not insert the
115 promised '?' replacement.
117 PP/04 Documentation: current string operators work on bytes, not codepoints.
119 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
120 should pack well giving a smaller memory footprint so better caching and
121 therefore performance. Group the declarations where this can't be done so
122 that the byte-sized flag variables are not interspersed among pointer
123 variables, giving a better chance of good packing by the compiler.
125 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
126 non-null, to avoid issues with sites running BATV. Previously reports were
127 sent with an empty envelope sender so looked like bounces.
129 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
130 The ignore_error flag wasn't being returned from the filter subprocess so
131 was not set for later routers. Investigation and fix by Matthias Kurz.
133 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
134 and a msg:complete for the whole, when a message is manually removed using
135 -Mrm. Developement by Matthias Kurz, hacked on by JH.
137 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
138 a "Gnu special" function, asprintf() in the DB utility binary builds; I
139 hope that is portable enough.
141 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
142 requiring a known-CA anchor certificate; make it now rely entirely on the
143 TLSA as an anchor. Checking the name on the leaf cert against the name
144 on the A-record for the host is still done for TA (but not for EE mode).
146 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
147 included in delivery lines for non-proxied connections, when compiled with
148 SUPPORT_SOCKS and running with proxy logging enabled.
150 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
151 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
152 move the existing event to fire before the normal logging of message
153 failure so that custom logging is bracketed by normal logging.
155 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
156 msg:fail:internal event. Developement by Matthias Kurz.
158 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
159 far too small for todays use of crypto signatures stored there. Go all
160 the way to the max DNS message size of 64kB, even though this might be
161 overmuch for IOT constrained device use.
163 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
164 copy a string over itself. The library routine is documented as not
165 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
167 JH/32 For main options check_spool_space and check_inode_space, where the
168 platform supports 64b integers, support more than the previous 2^31 kB
169 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
170 the previous G, M, k.
172 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
173 $authenticated_fail_id variable on authentication failure. Previously
176 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
177 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
178 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
179 GNUTLS_SEC_PARAM_MEDIUM.
181 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
182 side. Previously we would continue as if no SNI had been received.
184 JH/36 Harden the handling of string-lists. When a list consisted of a sole
185 "<" character, which should be a list-separator specification, we walked
186 off past the nul-terimation.
188 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
189 causes) even when the retry time is not yet met. Previously they were
190 not, meaning that when (say) an account was over-quota and temp-rejecting,
191 and multiple senders' messages were queued, only one sender would get
192 notified on each configured delay_warning cycle.
194 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
196 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
197 cipher-suites, an error can be left on the stack even for a succeeding
198 accept; this results in impossible error messages when a later operation
201 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
202 return error codes indicating retry. Under TLS1.3 this becomes required.
204 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
205 it only wrote the new authenticators, resulting in a lack of tracking of
206 peer changes of ESMTP extensions until the next cache flush.
208 JH/41 Fix the loop reading a message header line to check for integer overflow,
209 and more-often against header_maxsize. Previously a crafted message could
210 induce a crash of the recive process; now the message is cleanly rejected.
212 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
213 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
219 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
220 When redis_servers is set to a list of > 1 element, and the Redis servers
221 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
222 case of MOVED into a DEFER case instead, thus moving the query onto the
223 next server in the list. For a cluster of N elements, all N servers must
224 be defined in redis_servers.
226 GF/02 Catch and remove uninitialized value warning in exiqsumm
227 Check for existence of @ARGV before looking at $ARGV[0]
229 JH/01 Replace the store_release() internal interface with store_newblock(),
230 which internalises the check required to safely use the old one, plus
231 the allocate and data copy operations duplicated in both (!) of the
232 extant use locations.
234 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
235 modifier. This matches the restriction on the commandline.
237 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
238 Previously only the last row was returned.
240 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
241 we assumed that tags in the header were well-formed, and parsed the
242 element content after inspecting only the first char of the tag.
243 Assumptions at that stage could crash the receive process on malformed
246 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
247 While running the DKIM ACL we operate on the Permanent memory pool so that
248 variables created with "set" persist to the DATA ACL. Also (at any time)
249 DNS lookups that fail create cache records using the Permanent pool. But
250 expansions release any allocations made on the current pool - so a dnsdb
251 lookup expansion done in the DKIM ACL releases the memory used for the
252 DNS negative-cache, and bad things result. Solution is to switch to the
253 Main pool for expansions.
254 While we're in that code, add checks on the DNS cache during store_reset,
255 active in the testsuite.
256 Problem spotted, and debugging aided, by Wolfgang Breyha.
258 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
259 When none of the hosts presented to a transport match an already-open
260 connection, close it and proceed with the list. Previously we would
261 queue the message. Spotted by Lena with Yahoo, probably involving
264 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
265 Previously a spurious "250 OK id=" response was appended to the proper
268 JH/08 The "support for" informational output now, which built with Content
269 Scanning support, has a line for the malware scanner interfaces compiled
270 in. Interface can be individually included or not at build time.
272 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
273 by the template makefile "src/EDITME". The "STREAM" support for an older
274 ClamAV interface method is removed.
276 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
277 rows affected is given instead).
279 JH/11 The runtime Berkeley DB library version is now additionally output by
280 "exim -d -bV". Previously only the compile-time version was shown.
282 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
283 SMTP connection. Previously, when one had more receipients than the
284 first, an abortive onward connection was made. Move to full support for
285 multiple onward connections in sequence, handling cutthrough connection
286 for all multi-message initiating connections.
288 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
289 routers. Previously, a multi-recipient message would fail to match the
290 onward-connection opened for the first recipient, and cause its closure.
292 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
293 a timeout on read on a GnuTLS initiating connection, resulting in the
294 initiating connection being dropped. This mattered most when the callout
295 was marked defer_ok. Fix to keep the two timeout-detection methods
298 JH/15 Relax results from ACL control request to enable cutthrough, in
299 unsupported situations, from error to silently (except under debug)
300 ignoring. This covers use with PRDR, frozen messages, queue-only and
303 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
305 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
306 metadata, resulting in a crash in free().
308 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
309 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
310 Broken also in d185889f4, with init system revamp.
312 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
313 Previously we abruptly closed the connection after reading a malware-
314 found indication; now we go on to read the "scan ok" response line,
317 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
318 ACL. Previously, a crash would result.
320 JH/19 Speed up macro lookups during configuration file read, by skipping non-
321 macro text after a replacement (previously it was only once per line) and
322 by skipping builtin macros when searching for an uppercase lead character.
324 JH/20 DANE support moved from Experimental to mainline. The Makefile control
325 for the build is renamed.
327 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
328 was allocated for every new TLS startup, meaning one per message. Fix
329 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
331 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
332 reported the original. Fix to report (as far as possible) the ACL
333 result replacing the original.
335 JH/23 Fix memory leak during multi-message connections using STARTTLS under
336 OpenSSL. Certificate information is loaded for every new TLS startup,
337 and the resources needed to be freed.
339 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
341 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
344 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
345 DATA response info to the (existing) per-recipient response info for
346 the "C=" log element. It can have useful tracking info from the
347 destination system. Patch from Simon Arlott.
349 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
350 length value. Previously this would segfault.
352 HS/02 Support Avast multiline protoocol, this allows passing flags to
353 newer versions of the scanner.
355 JH/28 Ensure that variables possibly set during message acceptance are marked
356 dead before release of memory in the daemon loop. This stops complaints
357 about them when the debug_store option is enabled. Discovered specifically
358 for sender_rate_period, but applies to a whole set of variables.
359 Do the same for the queue-runner and queue-list loops, for variables set
360 from spool message files. Do the same for the SMTP per-message loop, for
361 certain variables indirectly set in ACL operations.
363 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
364 as a multi-recipient message from a mailinglist manager). The coding had
365 an arbitrary cutoff number of characters while checking for more input;
366 enforced by writing a NUL into the buffer. This corrupted long / fast
367 input. The problem was exposed more widely when more pipelineing of SMTP
368 responses was introduced, and one Exim system was feeding another.
369 The symptom is log complaints of SMTP syntax error (NUL chars) on the
370 receiving system, and refused recipients seen by the sending system
371 (propating to people being dropped from mailing lists).
372 Discovered and pinpointed by David Carter.
374 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
375 replaced by the ${authresults } expansion.
377 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
379 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
380 allows proper process termination in container environments.
382 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
383 Previously the "final dot" had a newline after it; ensure it is CR,LF.
385 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
386 and "err_perm", deprecated since 4.83 when the RFC-defined words
387 "temperror" and "permerror" were introduced.
389 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
390 transport-filters or DKIM-signing. The restriction was lost in the
391 consolidation of verify-callout and delivery SMTP handling.
392 Extend the restriction to also cover ARC-signing.
394 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
395 in defer=pass mode supply a 450 to the initiator. Previously the message
398 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
399 tls_require_ciphers is used as before.
401 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
402 "pass_unscanned". Only tmpfails from the scanner are written to
403 the paniclog, as they may require admin intervention (permission
404 denied, license issues). Other scanner errors (like decompression
405 bombs) do not cause a paniclog entry.
407 JH/36 Fix reinitialisation of DKIM logging variable between messages.
408 Previously it was possible to log spurious information in receive log
411 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
412 triggered odd behaviour from Outlook Express clients.
414 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
417 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
418 since the IETF WG has not yet settled on that versus the original
419 "bare" representation.
421 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
422 Previously the millisecond value corrupted the output.
423 Fix also for syslog_pid=no and log_selector +pid, for which the pid
424 corrupted the output.
430 JH/01 Rework error string handling in TLS interface so that the caller in
431 more cases is responsible for logging. This permits library-sourced
432 string to be attached to addresses during delivery, and collapses
433 pairs of long lines into single ones.
435 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
436 during configuration. Wildcards are allowed and expanded.
438 JH/02 Rework error string handling in DKIM to pass more info back to callers.
439 This permits better logging.
441 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
442 do not close it down and have the child transport start it up again on
443 the passed-on TCP connection. Instead, proxy the child (and any
444 subsequent ones) for TLS via a unix-domain socket channel. Logging is
445 affected: the continued delivery log lines do not have any DNSSEC, TLS
446 Certificate or OCSP information. TLS cipher information is still logged.
448 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
449 identical IP addresses on different listening ports. Will also affect
452 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
453 add noisy ifdef guards to special-case this sillyness.
454 Patch from Bernd Kuhls.
456 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
457 than 255 are no longer allowed.
459 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
460 Disable the session-cache too, which might reduce our load. Since we
461 currrectly use a new context for every connection, both as server and
462 client, there is no benefit for these.
463 GnuTLS appears to not support tickets server-side by default (we don't
464 call gnutls_session_ticket_enable_server()) but client side is enabled
465 by default on recent versions (3.1.3 +) unless the PFS priority string
468 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
469 <https://reproducible-builds.org/specs/source-date-epoch/>.
471 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
472 the check for any unsuccessful recipients did not notice the limit, and
473 erroneously found still-pending ones.
475 JH/08 Pipeline CHUNKING command and data together, on kernels that support
476 MSG_MORE. Only in-clear (not on TLS connections).
478 JH/09 Avoid using a temporary file during transport using dkim. Unless a
479 transport-filter is involved we can buffer the headers in memory for
480 creating the signature, and read the spool data file once for the
481 signature and again for transmission.
483 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
484 4.77 as the kernel support then wasn't solid, having issues in 64bit
485 mode. Now, it's been long enough. Add support for FreeBSD also.
487 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
488 case where the routing stage had gathered several addresses to send to
489 a host before calling the transport for the first, we previously failed
490 to close down TLS in the old transport process before passing the TCP
491 connection to the new process. The new one sent a STARTTLS command
492 which naturally failed, giving a failed delivery and bloating the retry
493 database. Investigation and fix prototype from Wolfgang Breyha.
495 JH/12 Fix check on SMTP command input synchronisation. Previously there were
496 false-negatives in the check that the sender had not preempted a response
497 or prompt from Exim (running as a server), due to that code's lack of
498 awareness of the SMTP input buffering.
500 PP/04 Add commandline_checks_require_admin option.
501 Exim drops privileges sanely, various checks such as -be aren't a
502 security problem, as long as you trust local users with access to their
503 own account. When invoked by services which pass untrusted data to
504 Exim, this might be an issue. Set this option in main configuration
505 AND make fixes to the calling application, such as using `--` to stop
508 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
509 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
510 responses to those, into a single TLS record each way (this usually means
511 a single packet). As a side issue, smtp_enforce_sync now works on TLS
514 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
515 affects you only if you're dancing at the edge of the param size limits.
516 If you are, and this message makes sense to you, then: raise the
517 configured limit or use OpenSSL 1.1. Nothing we can do for older
520 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
521 cmdline element to get the documented default one. Previously it was
524 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
525 are unsuable for non-message-specific reasons - eg. connection timeout,
526 banner-time rejection.
528 JH/16 Fix logging of delivery remote port, when specified by router, under
531 PP/06 Repair manualroute's ability to take options in any order, even if one
532 is the name of a transport.
535 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
537 JH/17 Change the list-building routines interface to use the expanding-string
538 triplet model, for better allocation and copying behaviour.
540 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
541 Previously it was constructed the first time a possibly-matching string
542 was met in the configuration file input during startup; now it is done
545 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
546 compatible one, to avoid the (poorly documented) possibility of a config
547 file in the working directory redirecting the DB files, possibly correpting
548 some existing file. CVE-2017-10140 assigned for BDB.
550 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
551 cache-hot. Previously, although the result was properly cached, the
552 initial verify call returned a defer.
554 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
555 the main verify for receipient in uncached-mode.
557 JH/22 Retire historical build files to an "unsupported" subdir. These are
558 defined as "ones for which we have no current evidence of testing".
560 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
561 if present. Previously it was ignored.
563 JH/24 Start using specified-initialisers in C structure init coding. This is
564 a C99 feature (it's 2017, so now considered safe).
566 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
567 if was a fixed-sized field and bitmask ops via macros; it is now more
570 PP/07 GitHub PR 56: Apply MariaDB build fix.
571 Patch provided by Jaroslav Škarvada.
573 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
574 during Coverity cleanups [4.87 JH/47]
575 Diagnosis and fix provided by Michael Fischer v. Mollard.
577 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
578 the right size to place the terminating semicolon on its own folded
579 line, the header hash was calculated to an incorrect value thanks to
580 the (relaxed) space the fold became.
582 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
583 and confused the parent.
585 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
586 which could crash as a result. This could lead to undeliverable messages.
588 JH/28 Logging: "next input sent too soon" now shows where input was truncated
591 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
592 matters on fast-turnover and PID-randomising systems, which were getting
593 out-of-order delivery.
595 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
596 a possibly-overlapping copy. The symptom was that "Remote host closed
597 connection in response to HELO" was logged instead of the actual 4xx
600 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
601 Previously only that bufferd was discarded, resulting in SYMTP command
604 JH/32 DKIM: when a message has multiple signatures matching an identity given
605 in dkim_verify_signers, run the dkim acl once for each. Previously only
606 one run was done. Bug 2189.
608 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
609 "panic the current process" to "deliberately defer". The panic log is
610 still written with the problem list name; the mail and reject logs now
611 get a temp-reject line for the message that was being handled, saying
612 something like "domains check lookup or other defer". The SMTP 451
613 message is still "Temporary local problem".
615 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
616 A crafted sequence of BDAT commands could result in in-use memory beeing
617 freed. CVE-2017-16943.
619 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
620 from SMTP input. Previously it was always done; now only done for DATA
621 and not BDAT commands. CVE-2017-16944.
623 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
624 to the message (such as an overlong header line). Previously this was
625 not done and we did not exit BDAT mode. Followon from the previous item
626 though a different problem.
632 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
633 than -2003 did; needs libidn2 in addition to libidn.
635 JH/02 The path option on a pipe transport is now expanded before use.
637 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
638 Patch provided by "Björn", documentation fix added too.
640 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
641 missing a wire-to-host endian conversion.
643 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
644 close after a BDAT command line could be taken as a following command,
645 giving a synch failure. Fix by only checking for synch immediately
646 before acknowledging the chunk.
648 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
649 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
650 macro. Patches provided by Josh Soref.
652 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
653 Previously we did not; the RFC seems ambiguous and VRFY is not listed
654 by IANA as a service extension. However, John Klensin suggests that we
657 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
658 the dkim code may be unix-mode line endings rather than smtp wire-format
659 CRLF, so prepend a CR to any bare LF.
661 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
662 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
664 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
665 the first were themselves being wrongly included in the feed into dkim
666 processing; with most chunk sizes in use this resulted in an incorrect
667 body hash calculated value.
669 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
670 DKIM signature block, for verification. Although advised against by
671 standards it is specifically not ruled illegal.
673 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
675 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
676 missing a body hash (the bh= tag).
678 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
679 It seems that HAProxy sends the Proxy Protocol information in clear and
680 only then does a TLS startup, so do the same.
682 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
683 TCP connections (such as for Spamd) unless the daemon successfully set
684 Fast Open mode on its listening sockets. This fixes breakage seen on
685 too-old kernels or those not configured for Fast Open, at the cost of
686 requiring both directions being enabled for TFO, and TFO never being used
687 by non-daemon-related Exim processes.
689 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
690 endings, at least on the first header line. Try to canonify any that get
691 past that check, despite the cost.
693 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
694 now limited to an arbitrary five deep, while parsing addresses with the
695 strip_excess_angle_brackets option enabled.
697 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
698 instead leave the unprompted TLS handshake in socket buffer for the
699 TLS library to consume.
701 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
703 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
705 JH/16 Drop variables when they go out of scope. Memory management drops a whole
706 region in one operation, for speed, and this leaves assigned pointers
707 dangling. Add checks run only under the testsuite which checks all
708 variables at a store-reset and panics on a dangling pointer; add code
709 explicitly nulling out all the variables discovered. Fixes one known
710 bug: a transport crash, where a dangling pointer for $sending_ip_address
711 originally assigned in a verify callout, is re-used.
713 PP/06 Drop '.' from @INC in various Perl scripts.
715 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
717 PP/08 Reduce a number of compilation warnings under clang; building with
718 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
719 should be warning-free.
721 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
723 HS/01 Fix portability problems introduced by PP/08 for platforms where
724 realloc(NULL) is not equivalent to malloc() [SunOS et al].
726 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
727 chunk. This allows us to accept broken chunked messages. We need a more
728 general solution here.
730 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
731 already-broken messages in the queue.
733 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
735 JH/19 Fix reference counting bug in routing-generated-address tracking.
741 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
742 supports it and a size is available (ie. the sending peer gave us one).
744 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
745 years of being deprecated). The replacements are the ACLs
746 acl_smtp_mime and acl_not_smtp_mime.
748 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
749 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
750 or even an in-clear connection were permitted. Now, if the host lookup
751 was dnssec and dane was requested then the host is only used if the
752 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
753 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
754 if one fails this test.
755 This means that a poorly-configured remote DNS will make it incommunicado;
756 but it protects against a DNS-interception attack on it.
758 JH/04 Bug 1810: make continued-use of an open smtp transport connection
759 non-noisy when a race steals the message being considered.
761 JH/05 If main configuration option tls_certificate is unset, generate a
762 self-signed certificate for inbound TLS connections.
764 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
765 in rewrites and routers.
767 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
768 and logged a warning sing 4.83; now they are a configuration file error.
770 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
771 (lacking @domain). Apply the same qualification processing as RCPT.
773 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
775 JH/10 Support ${sha256:} applied to a string (as well as the previous
778 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
779 a cutthrough deliver is pending, as we always want to make a connection.
780 This also avoids re-routing the message when later placing the cutthrough
781 connection after a verify cache hit.
782 Do not update it with the verify result either.
784 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
785 when routing results in more than one destination address.
787 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
788 signing (which inhibits the cutthrough capability). Previously only
789 the presence of an option was tested; now an expansion evaluating as
790 empty is permissible (obviously it should depend only on data available
791 when the cutthrough connection is made).
793 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
794 the relevant preceding SMTP command did not note the pipelining mode.
796 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
797 Previously they were not counted.
799 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
800 as one having no matching records. Previously we deferred the message
801 that needed the lookup.
803 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
804 distinguished as "(=".
806 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
807 for missing MX records. Previously it only worked for missing A records.
809 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
811 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
812 after the data-go-ahead and data-ack. Patch from Jason Betts.
814 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
815 even for a "none" policy. Patch from Tony Meyer.
817 JH/22 Fix continued use of a connection for further deliveries. If a port was
818 specified by a router, it must also match for the delivery to be
821 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
822 When one of the recipients of a message was unsuitable for the connection
823 (has no matching addresses), we lost track of needing to mark it
824 deferred. As a result mail would be lost.
826 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
828 JH/25 Decoding ACL controls is now done using a binary search; the source code
829 takes up less space and should be simpler to maintain. Merge the ACL
830 condition decode tables also, with similar effect.
832 JH/26 Fix problem with one_time used on a redirect router which returned the
833 parent address unchanged. A retry would see the parent address marked as
834 delivered, so not attempt the (identical) child. As a result mail would
837 JH/27 Fix a possible security hole, wherein a process operating with the Exim
838 UID can gain a root shell. Credit to http://www.halfdog.net/ for
839 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
842 JH/28 Enable {spool,log} filesystem space and inode checks as default.
843 Main config options check_{log,spool}_{inodes,space} are now
844 100 inodes, 10MB unless set otherwise in the configuration.
846 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
847 Previously it only applied to the main-section connection policy
850 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
852 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
853 by me. Added RFC7919 DH primes as an alternative.
855 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
856 are not in the system include path.
858 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
859 GnuTLS, when a session startup failed (eg because the client disconnected)
860 Exim did stdio operations after fclose. This was exposed by a recent
861 change which nulled out the file handle after the fclose.
863 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
864 signed directly by the cert-signing cert, rather than an intermediate
865 OCSP-signing cert. This is the model used by LetsEncrypt.
867 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
869 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
870 an incoming connection.
872 HS/02 Bug 1802: Do not half-close the connection after sending a request
875 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
876 fallback to "prime256v1".
878 JH/34 SECURITY: Use proper copy of DATA command in error message.
879 Could leak key material. Remotely exploitable. CVE-2016-9963.
885 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
886 and 3.4.4 - once the server is enabled to respond to an OCSP request
887 it does even when not requested, resulting in a stapling non-aware
888 client dropping the TLS connection.
890 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
891 support variable-length bit vectors. No functional change.
893 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
894 The I= interface field on outgoing lines is now after the H= remote
895 host field, same as incoming lines. There is a separate
896 outgoing_interface log selector which allows you to disable the
899 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
900 If not running log_selector +smtp_connection the mainlog would be held
901 open indefinitely after a "too many connections" event, including to a
902 deleted file after a log rotate. Leave the per net connection logging
903 leaving it open for efficiency as that will be quickly detected by the
904 check on the next write.
906 HS/01 Bug 1671: Fix post transport crash.
907 Processing the wait-<transport> messages could crash the delivery
908 process if the message IDs didn't exist for some reason. When
909 using 'split_spool_directory=yes' the construction of the spool
910 file name failed already, exposing the same netto behaviour.
912 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
913 mime_regex ACL conditions.
915 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
916 to DSN fail messages (bounces): remote IP, remote greeting, remote response
917 to HELO, local diagnostic string.
919 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
920 log line to debug. Even when configured with a tls authenticator many
921 client connections are expected to not authenticate in this way, so
922 an authenticate fail is not an error.
924 HS/02 Add the Exim version string to the process info. This way exiwhat
925 gives some more detail about the running daemon.
927 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
928 matter for fast-change records such as DNSBLs.
930 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
931 retry record, even if constant. There may be multiple transports with
932 different interface settings and the retry behaviour needs to be kept
935 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
937 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
939 JH/10 Bug 840: fix log_defer_output option of pipe transport
941 JH/11 Bug 830: use same host for all RCPTS of a message, even under
942 hosts_randomize. This matters a lot when combined with mua_wrapper.
944 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
945 ${quote_pgsql:<string>} operator.
947 JH/13 Bug 1708: avoid misaligned access in cached lookup.
949 JH/14 Change header file name for freeradius-client. Relevant if compiling
950 with Radius support; from the Gentoo tree and checked under Fedora.
952 JH/15 Bug 1712: Introduce $prdr_requested flag variable
954 JH/16 Bug 1714: Permit an empty string as expansion result for transport
955 option transport_filter, meaning no filtering.
957 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
959 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
960 defaults to "*" (all hosts). The variable is now available when not built
961 with TLS, default unset, mainly to enable keeping the testsuite sane.
962 If a server certificate is not supplied (via tls_certificate) an error is
963 logged, and clients will find TLS connections fail on startup. Presumably
964 they will retry in-clear.
965 Packagers of Exim are strongly encouraged to create a server certificate
966 at installation time.
968 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
969 with the $config_file variable.
971 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
972 in transport context, after the attempt, and per-recipient. The latter type
973 is per host attempted. The event data is the error message, and the errno
974 information encodes the lookup type (A vs. MX) used for the (first) host,
975 and the trailing two digits of the smtp 4xx response.
977 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
978 to write to mainlog (or rejectlog, paniclog) in the window between file
979 creation and permissions/ownership being changed. Particularly affects
980 installations where exicyclog is run as root, rather than exim user;
981 result is that the running daemon panics and dies.
983 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
985 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
986 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
987 "pri" and "weight". Note that the previous implicit priority given by the
988 list order is no longer honoured.
990 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
993 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
994 by defining SUPPORT_SOCKS.
996 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
997 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
998 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
999 variables are renamed to proxy_{local,external}_{address,port}.
1001 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1002 for a build by defining SUPPORT_I18N
1004 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1005 of the query string, and make ${quote_redis:} do that quoting.
1007 JH/29 Move Events support from Experimental to mainline, enabled by default
1008 and removable for a build by defining DISABLE_EVENT.
1010 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1012 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1013 cached by the daemon.
1015 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1016 by defining LOOKUP_REDIS. The libhiredis library is required.
1018 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1019 keys are given for lookup.
1021 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1022 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1023 only supported when built with TLS support. The PolarSSL SHA routines
1024 are still used when the TLS library is too old for convenient support.
1026 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1027 openssl_options), for security. OpenSSL forces this from version 1.1.0
1028 server-side so match that on older versions.
1030 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1031 allocation for $value could be released as the expansion processing
1032 concluded, but leaving the global pointer active for it.
1034 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1035 and to use the domains and local_parts ACL conditions.
1037 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1038 incorrectly not doubled on cutthrough transmission, hence seen as a
1039 body-termination at the receiving system - resulting in truncated mails.
1040 Commonly the sender saw a TCP-level error, and retransmitted the message
1041 via the normal store-and-forward channel. This could result in duplicates
1042 received - but deduplicating mailstores were liable to retain only the
1043 initial truncated version.
1045 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1047 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1049 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1050 we're in there, support oversigning also; bug 1309.
1052 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1054 HS/04 Add support for keep_environment and add_environment options.
1056 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1057 either intentional arithmetic overflow during PRNG, or testing config-
1060 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1061 delivery resulted in actual delivery. Cancel cutthrough before DATA
1064 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1065 rejects a recipient: pass the reject to the originator.
1067 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1068 Many were false-positives and ignorable, but it's worth fixing the
1071 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1072 for the new environment-manipulation done at startup. Move the routines
1073 from being local to tls.c to being global via the os.c file.
1075 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1076 an extract embedded as result-arg for a map, the first arg for extract
1077 is unavailable so we cannot tell if this is a numbered or keyed
1078 extraction. Accept either.
1084 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1087 JH/02 The smtp transport option "multi_domain" is now expanded.
1089 JH/03 The smtp transport now requests PRDR by default, if the server offers
1092 JH/04 Certificate name checking on server certificates, when exim is a client,
1093 is now done by default. The transport option tls_verify_cert_hostnames
1094 can be used to disable this per-host. The build option
1095 EXPERIMENTAL_CERTNAMES is withdrawn.
1097 JH/05 The value of the tls_verify_certificates smtp transport and main options
1098 default to the word "system" to access the system default CA bundle.
1099 For GnuTLS, only version 3.0.20 or later.
1101 JH/06 Verification of the server certificate for a TLS connection is now tried
1102 (but not required) by default. The verification status is now logged by
1103 default, for both outbound TLS and client-certificate supplying inbound
1106 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1109 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1110 Status Notification (bounce) messages are now MIME format per RFC 3464.
1111 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1112 under the control of the dsn_advertise_hosts option, and routers may
1113 have a dsn_lasthop option.
1115 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1116 default, modifiable by a malware= option. The list separator for
1117 the options can now be changed in the usual way. Bug 68.
1119 JH/10 The smtp_receive_timeout main option is now expanded before use.
1121 JH/11 The incoming_interface log option now also enables logging of the
1122 local interface on delivery outgoing connections.
1124 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1125 if the interface and destination host and port all match.
1127 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1130 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1131 Patch from Andrew Lewis.
1133 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1134 now supports optional time-restrictions, weighting, and priority
1135 modifiers per server. Patch originally by <rommer@active.by>.
1137 JH/16 The spamd_address main option now supports a mixed list of local
1138 and remote servers. Remote servers can be IPv6 addresses, and
1139 specify a port-range.
1141 JH/17 Bug 68: The spamd_address main option now supports an optional
1142 timeout value per server.
1144 JH/18 Bug 1581: Router and transport options headers_add/remove can
1145 now have the list separator specified.
1147 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1150 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1153 JH/21 Support for the A6 type of dns record is withdrawn.
1155 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1156 rather than the verbs used.
1158 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1159 from 255 to 1024 chars.
1161 JH/24 Verification callouts now attempt to use TLS by default.
1163 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1164 are generic router options now. The defaults didn't change.
1166 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1167 Original patch from Alexander Shikoff, worked over by JH.
1169 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1170 files if ZCAT_COMMAND is not executable.
1172 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1174 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1176 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1177 Normally benign, it bites when the pair was led to by a CNAME;
1178 modern usage is to not canonicalize the domain to a CNAME target
1179 (and we were inconsistent anyway for A-only vs AAAA+A).
1181 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1183 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1184 when evaluating $sender_host_dnssec.
1186 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1187 $sender_helo_dnssec variable.
1189 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1191 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1193 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1195 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1196 documented as working, but never had. Support all but $spam_report.
1198 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1199 added for tls authenticator.
1201 HS/03 Add perl_taintmode main config option
1207 TL/01 When running the test suite, the README says that variables such as
1208 no_msglog_check are global and can be placed anywhere in a specific
1209 test's script, however it was observed that placement needed to be near
1210 the beginning for it to behave that way. Changed the runtest perl
1211 script to read through the entire script once to detect and set these
1212 variables, reset to the beginning of the script, and then run through
1213 the script parsing/test process like normal.
1215 TL/02 The BSD's have an arc4random API. One of the functions to induce
1216 adding randomness was arc4random_stir(), but it has been removed in
1217 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1218 function when detected.
1220 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1221 cause callback expansion.
1223 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1224 syntax errors in an expansion can be treated as a string instead of
1225 logging or causing an error, due to the internal use of bool_lax
1226 instead of bool when processing it.
1228 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1229 server certificates when making smtp deliveries.
1231 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1233 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1235 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1237 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1238 Merged patch from Sebastian Wiedenroth.
1240 JH/05 Fix results-pipe from transport process. Several recipients, combined
1241 with certificate use, exposed issues where response data items split
1242 over buffer boundaries were not parsed properly. This eventually
1243 resulted in duplicates being sent. This issue only became common enough
1244 to notice due to the introduction of connection certificate information,
1245 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1247 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1248 size buffer was used, resulting in syntax errors when an expansion
1251 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1252 version 3.3.6 or later.
1254 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1255 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1256 both become "event_action", the variables become $event_name, $event_data
1257 and $event_defer_errno. There is a new variable $verify_mode, usable in
1258 routers, transports and related events. The tls:cert event is now also
1259 raised for inbound connections, if the main configuration event_action
1262 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1263 early OCSP support, but no stapling (appears to be less than 1.0.0).
1265 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1266 server certificate names available under the smtp transport option
1267 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1270 JH/10 Time-related extraction expansions from certificates now use the main
1271 option "timezone" setting for output formatting, and are consistent
1272 between OpenSSL and GnuTLS compilations. Bug 1541.
1274 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1275 encoded parameter in the incoming message. Bug 1558.
1277 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1278 include certificate info, eximon was claiming there were spoolfile
1281 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1283 JH/14 Log delivery-related information more consistently, using the sequence
1284 "H=<name> [<ip>]" wherever possible.
1286 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1287 are problematic for Debian distribution, omit them from the release
1290 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1292 JH/16 Fix string representation of time values on 64bit time_t architectures.
1295 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1296 output list separator was used.
1301 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1302 checkers that were complaining about end of non-void function with no
1305 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1306 This was a regression introduced in 4.83 by another bugfix.
1308 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1310 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1311 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1317 TF/01 Correctly close the server side of TLS when forking for delivery.
1319 When a message was received over SMTP with TLS, Exim failed to clear up
1320 the incoming connection properly after forking off the child process to
1321 deliver the message. In some situations the subsequent outgoing
1322 delivery connection happened to have the same fd number as the incoming
1323 connection previously had. Exim would try to use TLS and fail, logging
1324 a "Bad file descriptor" error.
1326 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1327 utilities have not been installed.
1329 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1330 temporary space as the ACL may create new global variables.
1332 TL/01 LDAP support uses per connection or global context settings, depending
1333 upon the detected version of the libraries at build time.
1335 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1336 to extract and use the src ip:port in logging and expansions as if it
1337 were a direct connection from the outside internet. PPv2 support was
1338 updated based on HAProxy spec change in May 2014.
1340 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1342 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1343 Properly escape header and check for NULL return.
1345 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1348 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1350 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1351 characters in header names, implemented as a verify condition.
1352 Contributed by Michael Fischer v. Mollard.
1354 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1355 results permerror and temperror. Previous values are deprecated but
1356 still accepted. In a future release, err_perm and err_temp will be
1357 completely removed, which will be a backward incompatibility if the
1358 ACL tests for either of these two old results. Patch contributed by
1359 user bes-internal on the mailing list.
1361 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1363 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1364 selectors, in both main and reject logs.
1366 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1369 JH/07 Add malware type "sock" for talking to simple daemon.
1371 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1373 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1374 routers/transports under cutthrough routing.
1376 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1377 numbers. Touch up "bool" conditional to keep the same definition.
1379 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1381 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1383 JH/12 Expand items in router/transport headers_add or headers_remove lists
1384 individually rather than the list as a whole. Bug 1452.
1386 Required for reasonable handling of multiple headers_ options when
1387 they may be empty; requires that headers_remove items with embedded
1388 colons must have them doubled (or the list-separator changed).
1390 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1391 view the policy declared in the DMARC record. Currently, $dmarc_status
1392 is a combined value of both the record presence and the result of the
1395 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1397 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1398 dnslookup router and the smtp transport (applying to the forward
1401 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1402 of ldap servers used for a specific lookup. Patch provided by Heiko
1405 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1406 New variable $lookup_dnssec_authenticated for observability.
1408 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1409 Patch submitted by Lars Timman.
1411 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1413 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1414 Requires trusted mode and valid format message id, aborts otherwise.
1415 Patch contributed by Heiko Schlichting.
1417 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1418 certextract with support for various fields. Bug 1358.
1420 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1421 is requested by default, modifiable by smtp transport option
1424 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1425 operate on certificate variables to give certificate fingerprints
1426 Also new ${sha256:cert_variable}.
1428 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1430 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1431 Christian Aistleitner.
1433 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1435 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1436 file. Patch from Wolfgang Breyha.
1438 JH/25 Expand the coverage of the delivery $host and $host_address to
1439 client authenticators run in verify callout. Bug 1476.
1441 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1442 align with daemon_smtp_ports. Bug 72.
1444 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1445 support and error reporting did not work properly.
1447 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1448 and is readable. Patch from Andrew Colin Kissa.
1450 TL/14 Enhance documentation of ${run expansion and how it parses the
1451 commandline after expansion, particularly in the case when an
1452 unquoted variable expansion results in an empty value.
1454 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1456 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1457 by renaming away from it. Addresses GH issue 15, reported by
1460 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1462 TL/15 SECURITY: prevent double expansion in math comparison functions
1463 (can expand unsanitized data). Not remotely exploitable.
1470 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1472 PP/02 Make -n do something, by making it not do something.
1473 When combined with -bP, the name of an option is not output.
1475 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1478 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1479 $sender_host_name and config options to manage this, and basic check
1482 PP/05 DSCP support for outbound connections and control modifier for inbound.
1484 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1485 (Only plugin which currently uses this is kerberos4, which nobody should
1486 be using, but we should make it available and other future plugins might
1487 conceivably use it, even though it would break NAT; stuff *should* be
1488 using channel bindings instead).
1490 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1491 name; added for Sendmail compatibility; requires admin caller.
1492 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1493 just ignore it); requires trusted caller.
1494 Also parse but ignore: -Ac -Am -X<logfile>
1497 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1499 TL/02 Add +smtp_confirmation as a default logging option.
1501 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1502 Patch by Magnus Holmgren from 2007-02-20.
1504 TL/04 Bugzilla 1281 - Spec typo.
1505 Bugzilla 1283 - Spec typo.
1506 Bugzilla 1290 - Spec grammar fixes.
1508 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1510 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1512 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1513 mailing list by by Dmitry Isaikin.
1515 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1517 JH/02 Support "G" suffix to numbers in ${if comparisons.
1519 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1521 NM/01 Bugzilla 1197 - Spec typo
1522 Bugzilla 1196 - Spec examples corrections
1524 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1526 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1527 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1530 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1531 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1533 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1534 "acl {{name}{arg}...}", and optional args on acl condition
1537 JH/05 Permit multiple router/transport headers_add/remove lines.
1539 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1541 JH/07 Avoid using a waiting database for a single-message-only transport.
1542 Performance patch from Paul Fisher. Bugzilla 1262.
1544 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1547 JH/09 Add $headers_added variable, with content from use of ACL modifier
1548 add_header (but not yet added to the message). Bugzilla 199.
1550 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1551 Pulled from Bugzilla 817 by Wolfgang Breyha.
1553 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1555 (nb: this is the same fix as in Exim 4.80.1)
1557 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1560 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1563 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1565 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1566 advertise SMTP AUTH mechanism to us, instead of a generic
1567 protocol violation error. Also, make Exim more robust to bad
1568 data from the Dovecot auth socket.
1570 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1572 When a queue runner is handling a message, Exim first routes the
1573 recipient addresses, during which it prunes them based on the retry
1574 hints database. After that it attempts to deliver the message to
1575 any remaining recipients. It then updates the hints database using
1578 So if a recipient address works intermittently, it can get repeatedly
1579 deferred at routing time. The retry hints record remains fresh so the
1580 address never reaches the final cutoff time.
1582 This is a fairly common occurrence when a user is bumping up against
1583 their storage quota. Exim had some logic in its local delivery code
1584 to deal with this. However it did not apply to per-recipient defers
1585 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1587 This change adds a proper retry rule check during routing so that the
1588 final cutoff time is checked against the message's age. We only do
1589 this check if there is an address retry record and there is not a
1590 domain retry record; this implies that previous attempts to handle
1591 the address had the retry_use_local_parts option turned on. We use
1592 this as an approximation for the destination being like a local
1593 delivery, as in LMTP.
1595 I suspect this new check makes the old local delivery cutoff check
1596 redundant, but I have not verified this so I left the code in place.
1598 TF/02 Correct gecos expansion when From: is a prefix of the username.
1600 Test 0254 submits a message to Exim with the header
1604 When I ran the test suite under the user fanf2, Exim expanded
1605 the header to contain my full name, whereas it should have added
1606 a Resent-Sender: header. It erroneously treats any prefix of the
1607 username as equal to the username.
1609 This change corrects that bug.
1611 GF/01 DCC debug and logging tidyup
1612 Error conditions log to paniclog rather than rejectlog.
1613 Debug lines prefixed by "DCC: " to remove any ambiguity.
1615 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1617 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1618 Bug spotted by Jeremy Harris; was flawed since initial commit.
1619 Would have resulted in OCSP responses post-SNI triggering an Exim
1620 NULL dereference and crash.
1622 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1624 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1625 Bug detection, analysis and fix by Samuel Thibault.
1626 Bugzilla 1331, Debian bug #698092.
1628 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1630 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1631 Server implementation by Todd Lyons, client by JH.
1632 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1633 config variable "prdr_enable" controls whether the server
1634 advertises the facility. If the client requests PRDR a new
1635 acl_data_smtp_prdr ACL is called once for each recipient, after
1636 the body content is received and before the acl_smtp_data ACL.
1637 The client is controlled by both of: a hosts_try_prdr option
1638 on the smtp transport, and the server advertisement.
1639 Default client logging of deliveries and rejections involving
1640 PRDR are flagged with the string "PRDR".
1642 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1643 fclose(). Diagnosis by Todd Lyons.
1645 PP/17 Update configure.default to handle IPv6 localhost better.
1646 Patch by Alain Williams (plus minor tweaks).
1649 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1650 This is now consistent with GnuTLS, and is now documented: the
1651 previous undocumented portable approach to treating the option as
1652 unset was to force an expansion failure. That still works, and
1653 an empty string is now equivalent.
1655 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1656 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1657 not performing validation itself.
1659 PP/20 Added force_command boolean option to pipe transport.
1660 Patch from Nick Koston, of cPanel Inc.
1662 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1665 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1667 PP/21 Fix eximon continuous updating with timestamped log-files.
1668 Broken in a format-string cleanup in 4.80, missed when I repaired the
1669 other false fix of the same issue.
1670 Report and fix from Heiko Schlichting.
1673 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1674 Report from Prashanth Katuri.
1676 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1677 It's SecureTransport, so affects any MacOS clients which use the
1678 system-integrated TLS libraries, including email clients.
1680 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1681 using a MIME ACL for non-SMTP local injection.
1682 Report and assistance in diagnosis by Warren Baker.
1684 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1686 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1688 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1689 last id that failed so it may be referenced in subsequent ACL's.
1691 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1694 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1695 ldap library initialization, allowing self-signed CA's to be
1696 used. Also properly sets require_cert option later in code by
1697 using NULL (global ldap config) instead of ldap handle (per
1698 session). Bug diagnosis and testing by alxgomz.
1700 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1701 the src/util/ subdirectory.
1703 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1704 renamed to Transport Post Delivery Action by Jeremy Harris, as
1707 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1708 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1709 redis_servers = needs to be configured which will be used by the redis
1710 lookup. Patch from Warren Baker, of The Packet Hub.
1712 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1714 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1715 hostname or reverse DNS when processing a host list. Used suggestions
1716 from multiple comments on this bug.
1718 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1720 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1721 Missed a few lines, added it to make the runtest require no keyboard
1724 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1725 contains upper case chars. Make router use caseful_local_part.
1727 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1728 support when GnuTLS has been built with p11-kit.
1734 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1736 This, or similar/improved, will also be change PP/11 of 4.82.
1742 PP/01 Handle short writes when writing local log-files.
1743 In practice, only affects FreeBSD (8 onwards).
1744 Bugzilla 1053, with thanks to Dmitry Isaikin.
1746 NM/01 Bugzilla 949 - Documentation tweak
1748 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1751 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1753 PP/02 Implemented gsasl authenticator.
1755 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1757 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1758 `pkg-config foo` for cflags/libs.
1760 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1761 with rest of GSASL and with heimdal_gssapi.
1763 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1764 `pkg-config foo` for cflags/libs for the TLS implementation.
1766 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1767 properties get this fed in as external SSF. A number of robustness
1768 and debugging improvements to the cyrus_sasl authenticator.
1770 PP/08 cyrus_sasl server now expands the server_realm option.
1772 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1773 Patch by Jeremy Harris.
1775 PP/10 Added dbmjz lookup type.
1777 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1779 PP/12 MAIL args handles TAB as well as SP, for better interop with
1780 non-compliant senders.
1781 Analysis and variant patch by Todd Lyons.
1783 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1784 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1785 Patch from Dirk Mueller <dmueller@suse.com>
1787 PP/13 tls_peerdn now print-escaped for spool files.
1788 Observed some $tls_peerdn in wild which contained \n, which resulted
1789 in spool file corruption.
1791 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1792 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1793 or write after TLS renegotiation, which otherwise led to messages
1796 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1797 as a tracking header (ie: a signed header comes before the signature).
1798 Patch from Wolfgang Breyha.
1800 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1801 comma-sep list; embedded commas doubled.
1803 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1805 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1807 Report and patch from Dmitry Banschikov.
1809 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1810 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1811 failures. We appear to now support TLS1.1+ with Exim.
1813 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1814 lets Exim select keys and certificates based upon TLS SNI from client.
1815 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1816 before an outbound SMTP session. New log_selector, +tls_sni.
1818 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1819 NULL dereference. Report and patch from Alun Jones.
1821 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1822 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1823 Not seeing resolver debug output on NetBSD, but suspect this is a
1824 resolver implementation change.
1826 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1827 Left warnings. Added "eximon gdb" invocation mode.
1829 PP/21 Defaulting "accept_8bitmime" to true, not false.
1831 PP/22 Added -bw for inetd wait mode support.
1833 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1834 locate the relevant includes and libraries. Made this the default.
1836 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1837 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1839 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1840 This may cause build issues on older platforms.
1842 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1843 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1844 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1845 Added SNI support via GnuTLS too.
1846 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1848 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1850 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1851 Applied second patch from Janne, implementing suggestion to default
1852 multiple-strings-in-record handling to match SPF spec.
1854 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1856 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1857 read-only, out of scope).
1858 Patch from Wolfgang Breyha, report from Stuart Northfield.
1860 PP/29 Fix three issues highlighted by clang analyser static analysis.
1861 Only crash-plausible issue would require the Cambridge-specific
1862 iplookup router and a misconfiguration.
1863 Report from Marcin Mirosław.
1865 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1867 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1868 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1869 As part of this, removing so much warning spew let me fix some minor
1870 real issues in debug logging.
1872 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1873 assignment on my part. Fixed.
1875 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1876 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1877 Janne Snabb (who went above and beyond: thank you).
1879 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1880 string otherwise requires a connection and a bunch more work and it's
1881 relatively easy to get wrong. Should also expose TLS library linkage
1884 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1885 64-bit ${eval} (JH/03).
1887 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1888 GNU libc to support some of the 64-bit stuff, should not lead to
1889 conflicts. Defined before os.h is pulled in, so if a given platform
1890 needs to override this, it can.
1892 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1893 protection layer was required, which is not implemented.
1894 Bugzilla 1254, patch from Wolfgang Breyha.
1896 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1897 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1898 tls_dhparam take prime identifiers. Also unbreak combination of
1899 OpenSSL+DH_params+TLSSNI.
1901 PP/39 Disable SSLv2 by default in OpenSSL support.
1907 PP/01 Solaris build fix for Oracle's LDAP libraries.
1908 Bugzilla 1109, patch from Stephen Usher.
1910 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1912 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1915 TF/02 Fix a couple more cases where we did not log the error message
1916 when unlink() failed. See also change 4.74-TF/03.
1918 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1919 lock up or crash if it happened to be inside a call to libc when it
1920 got a SIGUSR1 from exiwhat.
1922 The SIGUSR1 handler appends the current process status to the process
1923 log which is later printed by exiwhat. It used to use the general
1924 purpose logging code to do this, but several functions it calls are
1925 not safe for signals.
1927 The new output code in the SIGUSR1 handler is specific to the process
1928 log, and simple enough that it's easy to inspect for signal safety.
1929 Removing some special cases also simplifies the general logging code.
1930 Removing the spurious timestamps from the process log simplifies
1933 TF/04 Improved ratelimit ACL condition.
1935 The /noupdate option has been deprecated in favour of /readonly which
1936 has clearer semantics. The /leaky, /strict, and /readonly update modes
1937 are mutually exclusive. The update mode is no longer included in the
1938 database key; it just determines when the database is updated. (This
1939 means that when you upgrade Exim will forget old rate measurements.)
1941 Exim now checks that the per_* options are used with an update mode that
1942 makes sense for the current ACL. For example, when Exim is processing a
1943 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1944 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1945 must specify per_mail/readonly. If you omit the update mode it defaults to
1946 /leaky where that makes sense (as before) or /readonly where required.
1948 The /noupdate option is now undocumented but still supported for
1949 backwards compatibility. It is equivalent to /readonly except that in
1950 ACLs where /readonly is required you may specify /leaky/noupdate or
1951 /strict/noupdate which are treated the same as /readonly.
1953 A useful new feature is the /count= option. This is a generalization
1954 of the per_byte option, so that you can measure the throughput of other
1955 aggregate values. For example, the per_byte option is now equivalent
1956 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1958 The per_rcpt option has been generalized using the /count= mechanism
1959 (though it's more complicated than the per_byte equivalence). When it is
1960 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1961 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1962 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1963 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1964 Note that using per_rcpt with a non-readonly update mode in more than
1965 one ACL will cause the recipients to be double-counted. (The per_mail
1966 and per_byte options don't have this problem.)
1968 The handling of very low rates has changed slightly. If the computed rate
1969 is less than the event's count (usually one) then this event is the first
1970 after a long gap. In this case the rate is set to the same as this event's
1971 count, so that the first message of a spam run is counted properly.
1973 The major new feature is a mechanism for counting the rate of unique
1974 events. The new per_addr option counts the number of different
1975 recipients that someone has sent messages to in the last time period. It
1976 behaves like per_rcpt if all the recipient addresses are different, but
1977 duplicate recipient addresses do not increase the measured rate. Like
1978 the /count= option this is a general mechanism, so the per_addr option
1979 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1980 example, measure the rate that a client uses different sender addresses
1981 with the options per_mail/unique=$sender_address. There are further
1982 details in the main documentation.
1984 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1986 TF/06 Removed a few PCRE remnants.
1988 TF/07 Automatically extract Exim's version number from tags in the git
1989 repository when doing development or release builds.
1991 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1992 Bugzilla 879. Patch from Paul Fisher.
1994 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1995 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1998 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2000 PP/05 Variable $av_failed, true if the AV scanner deferred.
2001 Bugzilla 1078. Patch from John Horne.
2003 PP/06 Stop make process more reliably on build failure.
2004 Bugzilla 1087. Patch from Heiko Schlittermann.
2006 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2007 Bugzilla 1089. Patch from Heiko Schlittermann.
2009 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2010 Bugzilla 1131. Patch from Holger Weiß.
2012 PP/09 Handle IPv6 addresses with SPF.
2013 Bugzilla 860. Patch from Wolfgang Breyha.
2015 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2017 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2020 PP/11 match_* no longer expand right-hand-side by default.
2021 New compile-time build option, EXPAND_LISTMATCH_RHS.
2022 New expansion conditions, "inlist", "inlisti".
2024 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2026 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2028 PP/14 fix log_write() format string regression from TF/03.
2029 Bugzilla 1152. Patch from Dmitry Isaikin.
2035 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2037 PP/02 Harmonised TLS library version reporting; only show if debugging.
2038 Layout now matches that introduced for other libraries in 4.74 PP/03.
2040 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2042 PP/04 New "dns_use_edns0" global option.
2044 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2047 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2048 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2050 TK/01 Updated PolarSSL code to 0.14.2.
2051 Bugzilla 1097. Patch from Andreas Metzler.
2053 PP/07 Catch divide-by-zero in ${eval:...}.
2054 Fixes bugzilla 1102.
2056 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2059 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2060 format-string attack -- SECURITY: remote arbitrary code execution.
2062 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2063 time unintentionally subject to list matching rules, letting the header
2064 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2065 arbitrary string expansion). This allowed for information disclosure.
2067 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2068 INT_MIN/-1 -- value coerced to INT_MAX.
2074 NM/01 Workaround for PCRE version dependency in version reporting
2077 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2078 This fixes portability to compilers other than gcc, notably
2079 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2081 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2082 makefiles for portability to HP-UX and POSIX correctness.
2084 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2085 Also via indented variable definition in the Makefile.
2086 (Debugging by Oliver Heesakkers).
2088 PP/02 Restore caching of spamd results with expanded spamd_address.
2089 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2091 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2092 Improves build reliability. Fix from: Frank Elsner
2094 NM/02 Fix wide character breakage in the rfc2047 coding
2095 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2097 NM/03 Allow underscore in dnslist lookups
2098 Fixes bug 1026. Patch from Graeme Fowler
2100 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2101 Code patches from Adam Ciarcinski of NetBSD.
2103 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2106 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2107 is logged, to avoid truncation. Patch from John Horne.
2109 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2110 Patch from Jakob Hirsch.
2112 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2113 SQL string expansion failure details.
2114 Patch from Andrey Oktyabrski.
2116 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2117 Patch from Simon Arlott.
2119 PP/09 New lookups functionality failed to compile on old gcc which rejects
2120 extern declarations in function scope.
2121 Patch from Oliver Fleischmann
2123 PP/10 Use sig_atomic_t for flags set from signal handlers.
2124 Check getgroups() return and improve debugging.
2125 Fixed developed for diagnosis in bug 927 (which turned out to be
2128 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2129 Patch from Mark Zealey.
2131 PP/12 Bugzilla 1056: Improved spamd server selection.
2132 Patch from Mark Zealey.
2134 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2135 Based on patch from Heiko Schlittermann.
2137 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2138 Patch from Uwe Doering, sign-off by Michael Haardt.
2140 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2141 variable declaration deep within a block. Bug and patch from
2144 PP/15 lookups-Makefile IRIX compatibility coercion.
2146 PP/16 Make DISABLE_DKIM build knob functional.
2148 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2149 Patch by Simon Arlott
2151 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2152 variable argument macros. Our copy now differs from upstream.
2158 TF/01 Failure to get a lock on a hints database can have serious
2159 consequences so log it to the panic log.
2161 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2162 controlled using the smtp_confirmation log selector.
2164 TF/03 Include the error message when we fail to unlink a spool file.
2166 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2167 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2168 for maintaining out-of-tree patches for some time.
2170 PP/01 Bugzilla 139: Documentation and portability issues.
2171 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2172 Handle per-OS dynamic-module compilation flags.
2174 PP/02 Let /dev/null have normal permissions.
2175 The 4.73 fixes were a little too stringent and complained about the
2176 permissions on /dev/null. Exempt it from some checks.
2177 Reported by Andreas M. Kirchwitz.
2179 PP/03 Report version information for many libraries, including
2180 Exim version information for dynamically loaded libraries. Created
2181 version.h, now support a version extension string for distributors
2182 who patch heavily. Dynamic module ABI change.
2184 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2185 privilege escalation vulnerability whereby the Exim run-time user
2186 can cause root to append content of the attacker's choosing to
2189 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2192 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2193 If dropping privileges for untrusted macros, we disabled normal logging
2194 on the basis that it would fail; for the Exim run-time user, this is not
2195 the case, and it resulted in successful deliveries going unlogged.
2196 Fixed. Reported by Andreas Metzler.
2202 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2203 only prepend for the Resent-* case. Fixes regression introduced in
2204 Exim 4.70 by NM/22 for Bugzilla 607.
2206 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2207 increasing numbers of administrators be bitten by this.
2209 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2211 PP/03 Bugzilla 994: added openssl_options main configuration option.
2213 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2215 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2217 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2219 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2220 without a peer certificate, leading to a segfault because of an
2221 assumption that peers always have certificates. Be a little more
2222 paranoid. Problem reported by Martin Tscholak.
2224 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2225 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2226 NB: ClamAV planning to remove STREAM in "middle of 2010".
2227 CL also introduces -bmalware, various -d+acl logging additions and
2228 more caution in buffer sizes.
2230 PP/09 Implemented reverse_ip expansion operator.
2232 PP/10 Bugzilla 937: provide a "debug" ACL control.
2234 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2236 PP/12 Bugzilla 973: Implement --version.
2238 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2240 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2242 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2244 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2245 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2246 ignore trailing whitespace.
2248 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2250 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2253 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2254 Notification from Dr Andrew Aitchison.
2256 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2257 ExtendedDetectionInfo response format.
2258 Notification from John Horne.
2260 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2263 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2264 XSL and documented dependency on system catalogs, with examples of how
2267 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2270 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2271 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2272 configuration file which is writeable by the Exim user or group.
2274 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2275 of configuration files to cover files specified with the -C option if
2276 they are going to be used with root privileges, not just the default
2279 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2280 option (effectively making it always true).
2282 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2283 files to be used while preserving root privileges.
2285 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2286 that rogue child processes cannot use them.
2288 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2289 run-time user, instead of root.
2291 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2292 Exim run-time user without dropping privileges.
2294 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2295 result string, instead of calling string_vformat() twice with the same
2298 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2299 for other users. Others should always drop root privileges if they use
2300 -C on the command line, even for a whitelisted configure file.
2302 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2304 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2310 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2311 $data_path, and $header_path variables; fixed documentation bugs and
2314 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2315 exipick to access non-standard spools, including the "frozen" queue
2318 NM/01 Bugzilla 965: Support mysql stored procedures.
2319 Patch from Alain Williams
2321 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2323 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2324 Patch from Andreas Metzler
2326 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2327 Patch from Kirill Miazine
2329 NM/05 Bugzilla 671: Added umask to procmail example.
2331 JJ/03 installed exipick 20100323.0, fixing doc bug
2333 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2334 directory. Notification and patch from Dan Rosenberg.
2336 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2338 TK/02 Improve log output when DKIM signing operation fails.
2340 MH/01 Treat the transport option dkim_domain as a colon separated
2341 list, not as a single string, and sign the message with each element,
2342 omitting multiple occurences of the same signer.
2344 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2345 Bugzilla 985, 986. Patch by Simon Arlott
2347 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2348 Patch by Simon Arlott
2350 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2351 MBX locking. Notification from Dan Rosenberg.
2357 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2359 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2361 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2363 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2365 NM/04 Bugzilla 915: Flag broken perl installation during build.
2371 TK/01 Added patch by Johannes Berg that expands the main option
2372 "spamd_address" if it starts with a dollar sign.
2374 TK/02 Write list of recipients to X-Envelope-Sender header when building
2375 the mbox-format spool file for content scanning (suggested by Jakob
2378 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2379 (http://www.dcc-servers.net/) support via dccifd. Activated by
2380 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2382 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2383 by Mark Daniel Reidel <mr@df.eu>.
2385 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2386 When building exim an external PCRE library is now needed -
2387 PCRE is a system library on the majority of modern systems.
2388 See entry on PCRE_LIBS in EDITME file.
2390 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2391 conversation. Added nologin parameter to request.
2392 Patch contributed by Kirill Miazine.
2394 TF/01 Do not log submission mode rewrites if they do not change the address.
2396 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2398 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2399 log files in place. Contributed by Roberto Lima.
2401 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2403 TF/03 Bugzilla 615: When checking the local_parts router precondition
2404 after a local_part_suffix or local_part_prefix option, Exim now
2405 does not use the address's named list lookup cache, since this
2406 contains cached lookups for the whole local part.
2408 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2409 Robert Millan. Documentation is in experimental-spec.txt.
2411 TF/04 Bugzilla 668: Fix parallel build (make -j).
2413 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2415 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2416 Patch provided by Jan Srzednicki.
2418 TF/05 Leading white space used to be stripped from $spam_report which
2419 wrecked the formatting. Now it is preserved.
2421 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2422 that they are available at delivery time.
2424 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2426 TF/08 TLS error reporting now respects the incoming_interface and
2427 incoming_port log selectors.
2429 TF/09 Produce a more useful error message if an SMTP transport's hosts
2430 setting expands to an empty string.
2432 NM/06 Bugzilla 744: EXPN did not work under TLS.
2433 Patch provided by Phil Pennock.
2435 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2436 Patch provided by Richard Godbee.
2438 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2439 acl_smtp_notquit, added index entry.
2441 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2442 Patch provided by Eugene Bujak.
2444 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2445 accept(). Patch provided by Maxim Dounin.
2447 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2448 Patch provided by Phil Pennock.
2450 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2452 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2453 Patch provided by Brad "anomie" Jorsch.
2455 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2456 Patch provided by Dean Brooks.
2458 TK/05 Add native DKIM support (does not depend on external libraries).
2460 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2461 Patch provided by Graeme Fowler.
2463 NM/16 Bugzilla 851: Documentation example syntax fix.
2465 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2467 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2470 NM/19 Bugzilla 745: TLS version reporting.
2471 Patch provided by Phil Pennock.
2473 NM/20 Bugzilla 167: bool: condition support.
2474 Patch provided by Phil Pennock.
2476 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2477 clients. Patch provided by Phil Pennock.
2479 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2480 Patch provided by Brad "anomie" Jorsch.
2482 NM/23 Bugzilla 687: Fix misparses in eximstats.
2483 Patch provided by Heiko Schlittermann.
2485 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2486 Patch provided by Heiko Schlittermann.
2488 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2489 plus update to original patch.
2491 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2493 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2494 Patch provided by David Brownlee.
2496 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2498 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2500 NM/30 Bugzilla 888: TLS documentation bugfixes.
2502 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2504 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2505 Unlike the original bugzilla I have changed all shell scripts in src tree.
2507 NM/33 Bugzilla 898: Transport filter timeout fix.
2508 Patch by Todd Rinaldo.
2510 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2511 Patch by Serge Demonchaux.
2513 NM/35 Bugzilla 39: Base64 decode bug fixes.
2514 Patch by Jakob Hirsch.
2516 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2518 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2520 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2522 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2528 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2529 ALT-N's libdkim that I have put here:
2530 http://duncanthrax.net/exim-experimental/
2532 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2533 were called 'true' and it seems that C99 defines that as a reserved
2534 keyword to be used with 'bool' variable types. That means you could
2535 not include C99-style headers which use bools without triggering
2536 build errors in sieve.c.
2538 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2539 as mailq or other aliases. Changed the --help handling significantly
2540 to do whats expected. exim_usage() emits usage/help information.
2542 SC/01 Added the -bylocaldomain option to eximstats.
2544 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2546 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2548 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2554 PH/01 Another patch from the Sieve maintainer.
2556 PH/02 When an IPv6 address is converted to a string for single-key lookup
2557 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2558 dots are used instead of colons so that keys in lsearch files need not
2559 contain colons. This was done some time before quoting was made available
2560 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2561 (notated using the quote facility) so as to distinguish them from IPv4
2562 keys. This meant that lookups for IP addresses in host lists did not work
2563 for iplsearch lookups.
2565 This has been fixed by arranging for IPv6 addresses to be expressed with
2566 colons if the lookup type is iplsearch. This is not incompatible, because
2567 previously such lookups could never work.
2569 The situation is now rather anomalous, since one *can* have colons in
2570 ordinary lsearch keys. However, making the change in all cases is
2571 incompatible and would probably break a number of configurations.
2573 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2576 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2577 conversion specification without a maximum field width, thereby enabling
2578 a rogue spamd server to cause a buffer overflow. While nobody in their
2579 right mind would setup Exim to query an untrusted spamd server, an
2580 attacker that gains access to a server running spamd could potentially
2581 exploit this vulnerability to run arbitrary code as the Exim user.
2583 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2584 $primary_hostname instead of what libspf2 thinks the hosts name is.
2586 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2587 a directory entry by the name of the lookup key. Previously, if a
2588 symlink pointed to a non-existing file or a file in a directory that
2589 Exim lacked permissions to read, a lookup for a key matching that
2590 symlink would fail. Now it is enough that a matching directory entry
2591 exists, symlink or not. (Bugzilla 503.)
2593 PH/03 The body_linecount and body_zerocount variables are now exported in the
2596 PH/04 Added the $dnslist_matched variable.
2598 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2599 This means they are set thereafter only if the connection becomes
2602 PH/06 Added the client_condition to authenticators so that some can be skipped
2603 by clients under certain conditions.
2605 PH/07 The error message for a badly-placed control=no_multiline_responses left
2606 "_responses" off the end of the name.
2608 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2610 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2611 (without spaces) instead of just copying the configuration text.
2613 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2615 PH/11 Added $max_received_linelength.
2617 PH/12 Added +ignore_defer and +include_defer to host lists.
2619 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2620 way in which PCRE > 7.0 is built.
2622 PH/14 Implemented queue_only_load_latch.
2624 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2625 MAIL command. The effect was to mangle the value on 64-bit systems.
2627 PH/16 Another patch from the Sieve maintainer.
2629 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2631 PH/18 If a system quota error occurred while trying to create the file for
2632 a maildir delivery, the message "Mailbox is full" was not appended to the
2633 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2634 only to a quota excession during the actual writing of the file.
2636 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2637 characters?) which causes problems in log lines. The DN values are now
2638 passed through string_printing() before being added to log lines.
2640 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2641 and InterBase are left for another time.)
2643 PH/21 Added message_body_newlines option.
2645 PH/22 Guard against possible overflow in moan_check_errorcopy().
2647 PH/23 POSIX allows open() to be a macro; guard against that.
2649 PH/24 If the recipient of an error message contained an @ in the local part
2650 (suitably quoted, of course), incorrect values were put in $domain and
2651 $local_part during the evaluation of errors_copy.
2657 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2658 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2661 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2662 issue a MAIL command.
2664 PH/02 In an ACL statement such as
2666 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2668 if a client was not listed at all, or was listed with a value other than
2669 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2670 the condition was not true (as it should be), so access was not denied.
2671 The bug was that the ! inversion was incorrectly passed on to the second
2672 item. This has been fixed.
2674 PH/03 Added additional dnslists conditions == and =& which are different from
2675 = and & when the dns lookup returns more than one IP address.
2677 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2678 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2680 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2681 FSYNC, which compiles an option called disable_fsync that allows for
2682 bypassing fsync(). The documentation is heavily laced with warnings.
2684 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2686 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2687 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2688 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2689 including adding "make clean"; (3) Added -fPIC when compiling the test
2690 dynamically loaded module, to get rid of a warning.
2692 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2693 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2694 = 0s. The bug is otherwise harmless.
2696 PH/07 There was a bug in the dovecot authenticator such that the value of
2697 $auth1 could be overwritten, and so not correctly preserved, after a
2698 successful authentication. This usually meant that the value preserved by
2699 the server_setid option was incorrect.
2701 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2703 PH/09 Installed PCRE release 7.0.
2705 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2706 run for batched SMTP input. It is now run at the start of every message
2707 in the batch. While fixing this I discovered that the process information
2708 (output by running exiwhat) was not always getting set for -bs and -bS
2709 input. This is fixed, and it now also says "batched" for BSMTP.
2711 PH/11 Added control=no_pipelining.
2713 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2714 patch, slightly modified), and move the expansion of helo_data till after
2715 the connection is made in the smtp transport (so it can use these
2718 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2720 PH/14 Added log_selector = +pid.
2722 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2724 PH/16 Add ${if forany and ${if forall.
2726 PH/17 Added dsn_from option to vary the From: line in DSNs.
2728 PH/18 Flush SMTP output before performing a callout, unless control =
2729 no_callout_flush is set.
2731 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2732 was true (the default) a successful delivery failed to delete the retry
2733 item, thus causing premature timeout of the address. The bug is now
2736 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2738 PH/21 Long custom messages for fakedefer and fakereject are now split up
2739 into multiline responses in the same way that messages for "deny" and
2740 other ACL rejections are.
2742 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2743 with slight modification.
2745 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2746 draft, changing the syntax and factoring some duplicate code".
2748 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2749 for deliveries of the second and subsequent messages over the same SMTP
2752 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2753 ${reduce, with only minor "tidies".
2755 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2757 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2758 expansion side effects.
2760 PH/27 When a message times out after an over-quota error from an Exim-imposed
2761 quota, the bounce message says "mailbox is full". This message was not
2762 being given when it was a system quota that was exceeded. It now should
2765 MH/03 Made $recipients available in local_scan(). local_scan() already has
2766 better access to the recipient list through recipients_list[], but
2767 $recipients can be useful in postmaster-provided expansion strings.
2769 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2770 in the case of a MAIL command with additional options following the
2771 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2772 were accidentally chopped off.
2774 PH/29 SMTP synchronization checks are implemented when a command is read -
2775 there is a check that no more input is waiting when there shouldn't be
2776 any. However, for some commands, a delay in an ACL can mean that it is
2777 some time before the response is written. In this time, more input might
2778 arrive, invalidly. So now there are extra checks after an ACL has run for
2779 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2780 pipelining has not been advertised.
2782 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2784 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2785 returned in the SMTP response when smtp_return_error_details was false.
2786 This has been fixed.
2788 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2789 instead of the C I/O that was originally supplied, because problems were
2790 reported on Solaris.
2792 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2793 Exim which did not show up earlier: it was assuming that a call to
2794 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2795 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2796 was a macro that became an assignment, so it seemed to work. This has
2797 changed to a proper function call with a void return, hence the compile
2798 error. Exim's code has been fixed.
2800 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2803 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2805 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2807 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2808 because it turns out to be too big or there is a timeout) there is no
2809 "Completed" line in the log. When some messages of this type were
2810 selected by exigrep, they were listed as "not completed". Others were
2811 picked up by some special patterns. I have improved the selection
2812 criteria to be more general.
2814 PH/38 The host_find_failed option in the manualroute router can now be set
2815 to "ignore", to completely ignore a host whose IP address cannot be
2816 found. If all hosts are ignored, the behaviour is controlled by the new
2817 host_all_ignored option.
2819 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2820 homing or because of multiple MX records with /mx) generated more than
2821 one IP address, and the following item turned out to be the local host,
2822 all the secondary addresses of the first item were incorrectly removed
2823 from the list, along with the local host and any following hosts (which
2824 is what is supposed to happen).
2826 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2827 whoever called Exim into the -H file. In the case of the daemon it was
2828 behaving confusingly. When first started, it used values for whoever
2829 started the daemon, but after a SIGHUP it used the Exim user (because it
2830 calls itself on a restart). I have changed the code so that it now always
2833 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2834 message are rejected with the same error (e.g. no authentication or bad
2835 sender address), and a DATA command is nevertheless sent (as can happen
2836 with PIPELINING or a stupid MUA), the error message that was given to the
2837 RCPT commands is included in the rejection of the DATA command. This is
2838 intended to be helpful for MUAs that show only the final error to their
2841 PH/42 Another patch from the Sieve maintainer.
2843 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2844 Eximstats - Fixed some broken HTML links and added missing column headers
2846 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2847 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2849 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2851 PH/43 Yet another patch from the Sieve maintainer.
2853 PH/44 I found a way to check for a TCP/IP connection going away before sending
2854 the response to the final '.' that terminates a message, but only in the
2855 case where the client has not sent further data following the '.'
2856 (unfortunately, this is allowed). However, in many cases there won't be
2857 any further data because there won't be any more messages to send. A call
2858 to select() can be used: if it shows that the input is "ready", there is
2859 either input waiting, or the socket has been closed. An attempt to read
2860 the next input character can distinguish the two cases. Previously, Exim
2861 would have sent an OK response which the client would never have see.
2862 This could lead to message repetition. This fix should cure that, at
2863 least in a lot of common cases.
2865 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2866 advertised in response to EHLO.
2872 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2873 fixed by 4.65/MH/01 (is this a record?) are fixed:
2875 (i) An empty string was always treated as zero by the numeric comparison
2876 operators. This behaviour has been restored.
2878 (ii) It is documented that the numeric comparison operators always treat
2879 their arguments as decimal numbers. This was broken in that numbers
2880 starting with 0 were being interpreted as octal.
2882 While fixing these problems I realized that there was another issue that
2883 hadn't been noticed. Values of message_size_limit (both the global option
2884 and the transport option) were treated as octal if they started with 0.
2885 The documentation was vague. These values are now always treated as
2886 decimal, and I will make that clear in the documentation.
2892 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2893 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2896 MH/01 Don't check that the operands of numeric comparison operators are
2897 integers when their expansion is in "skipping" mode (fixes bug
2898 introduced by 4.64-PH/07).
2900 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2901 child addresses, Exim now panics and dies. Previously, because the count
2902 is held in a short int, deliveries were likely to be lost. As such a
2903 large number of recipients for a single message is ridiculous
2904 (performance will be very, very poor), I have chosen to impose a limit
2905 rather than extend the field.
2911 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2912 leftover -K file (the existence of which was triggered by #402).
2913 While we were at it, introduced process PID as part of the -K
2914 filename. This should rule out race conditions when creating
2917 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2918 processing considerably. Previous code took too long for large mails,
2919 triggering a timeout which in turn triggers #401.
2921 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2922 in the DK code in transports.c. sendfile() is not really portable,
2923 hence the _LINUX specificness.
2925 TF/01 In the add_headers option to the mail command in an Exim filter,
2926 there was a bug that Exim would claim a syntax error in any
2927 header after the first one which had an odd number of characters
2930 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2931 callout verification, Exim cached a "reject" for the entire domain. This
2932 is correct for most verifications, but it is not correct for a recipient
2933 verification with use_sender or use_postmaster set, because in that case
2934 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2935 case of MAIL FROM:<> rejection from other early rejections (e.g.
2936 rejection of HELO). When verifying a recipient using a non-null MAIL
2937 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2938 Whatever the result of the callout, the value of the domain cache is
2939 left unchanged (for any other kind of callout, getting as far as trying
2940 RCPT means that the domain itself is ok).
2942 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2945 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2946 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2947 session, the daemon ignores ECONNECT errors and logs others; it now
2948 ignores EPIPE as well.
2950 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2951 (quoted-printable decoding).
2953 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2954 later the small subsequent patch to fix an introduced bug.
2956 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2958 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2960 PH/08 An error is now given if message_size_limit is specified negative.
2962 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2963 to be given (somewhat) arbitrary names.
2965 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2968 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2969 miscellaneous code fixes
2971 PH/10 Added the log_reject_target ACL modifier to specify where to log
2974 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2975 hostname. This is wrong, because it relates to the incoming message (and
2976 probably the interface on which it is arriving) and not to the outgoing
2977 callout (which could be using a different interface). This has been
2978 changed to use the value of the helo_data option from the smtp transport
2979 instead - this is what is used when a message is actually being sent. If
2980 there is no remote transport (possible with a router that sets up host
2981 addresses), $smtp_active_hostname is used.
2983 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2984 tweaks were necessary in order to get it to work (see also 21 below):
2985 (a) The code assumed that strncpy() returns a negative number on buffer
2986 overflow, which isn't the case. Replaced with Exim's string_format()
2988 (b) There were several signed/unsigned issues. I just did the minimum
2989 hacking in of casts. There is scope for a larger refactoring.
2990 (c) The code used strcasecmp() which is not a standard C function.
2991 Replaced with Exim's strcmpic() function.
2992 (d) The code set only $1; it now sets $auth1 as well.
2993 (e) A simple test gave the error "authentication client didn't specify
2994 service in request". It would seem that Dovecot has changed its
2995 interface. Fortunately there's a specification; I followed it and
2996 changed what the client sends and it appears to be working now.
2998 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3001 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3002 address A is aliased to B and C, where B exists and C does not. Without
3003 -v the output is "A verified" because verification stops after a
3004 successful redirection if more than one address is generated. However,
3005 with -v the child addresses are also verified. Exim was outputting "A
3006 failed to verify" and then showing the successful verification for C,
3007 with its parentage. It now outputs "B failed to verify", showing B's
3008 parentage before showing the successful verification of C.
3010 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3011 look up a TXT record in a specific list after matching in a combined
3014 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3015 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3016 they consult the DNS. I had assumed they would set it the way they
3017 wanted; and indeed my experiments on Linux seem to show that in some
3018 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3019 To be on the safe side, however, I have now made the interface to
3020 host_find_byname() similar to host_find_bydns(), with an argument
3021 containing the DNS resolver options. The host_find_byname() function now
3022 sets these options at its start, just as host_find_bydns() does. The smtp
3023 transport options dns_qualify_single and dns_search_parents are passed to
3024 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3025 of host_find_byname() use the default settings of RES_DEFNAMES
3026 (qualify_single) but not RES_DNSRCH (search_parents).
3028 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3029 spool_read_header() do less string testing, by means of a preliminary
3030 switch on the second character of optional "-foo" lines. (This is
3031 overdue, caused by the large number of possibilities that now exist.
3032 Originally there were few.) While I was there, I also converted the
3033 str(n)cmp tests so they don't re-test the leading "-" and the first
3034 character, in the hope this might squeeze out yet more improvement.
3036 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3037 flag allowing group syntax was set by the header_syntax check but not
3038 turned off, possible causing trouble later; (2) The flag was not being
3039 set at all for the header_verify test, causing "group"-style headers to
3040 be rejected. I have now set it in this case, and also caused header_
3041 verify to ignore an empty address taken from a group. While doing this, I
3042 came across some other cases where the code for allowing group syntax
3043 while scanning a header line wasn't quite right (mostly, not resetting
3044 the flag correctly in the right place). These bugs could have caused
3045 trouble for malformed header lines. I hope it is now all correct.
3047 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3048 with the "reply" argument non-NULL. The code, however (which originally
3049 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3050 but it didn't always do it. This confused somebody who was copying the
3051 code for some other use. I have removed all the tests.
3053 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3054 feature that was used to support insecure browsers during the U.S. crypto
3055 embargo. It requires special client support, and Exim is probably the
3056 only MTA that supported it -- and would never use it because real RSA is
3057 always available. This code has been removed, because it had the bad
3058 effect of slowing Exim down by computing (never used) parameters for the
3059 RSA_EXPORT functionality.
3061 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3062 authenticator to fail if there's a tab character in the incoming data
3063 (there should never be unless someone is messing about, as it's supposed
3064 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3065 if the connection is using TLS or if the remote IP is the same as the
3066 local IP, and the "valid-client-cert option" if a client certificate has
3069 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3070 authenticators. This can be used for authorization after authentication
3071 succeeds. (In the case of plaintext, it servers for both authentication
3074 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3075 if any retry times were supplied.
3077 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3078 connection, where there is no client IP address to check. In this
3079 situation, the verify now always succeeds.
3081 PH/25 Applied John Jetmore's -Mset patch.
3083 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3085 PH/27 In a string expansion for a processed (not raw) header when multiple
3086 headers of the same name were present, leading whitespace was being
3087 removed from all of them, but trailing whitespace was being removed only
3088 from the last one. Now trailing whitespace is removed from each header
3089 before concatenation. Completely empty headers in a concatenation (as
3090 before) are ignored.
3092 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3093 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3095 PH/29 [Removed. This was a change that I later backed out, and forgot to
3096 correct the ChangeLog entry (that I had efficiently created) before
3097 committing the later change.]
3099 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3100 address errors (4xx response to RCPT) over the same connection as other
3101 messages routed to the same hosts. Such deliveries are always "forced",
3102 so retry times are not inspected. This resulted in far too many retries
3103 for the affected addresses. The effect occurred only when there were more
3104 hosts than the hosts_max_try setting in the smtp transport when it had
3105 the 4xx errors. Those hosts that it had tried were not added to the list
3106 of hosts for which the message was waiting, so if all were tried, there
3107 was no problem. Two fixes have been applied:
3109 (i) If there are any address or message errors in an SMTP delivery, none
3110 of the hosts (tried or untried) are now added to the list of hosts
3111 for which the message is waiting, so the message should not be a
3112 candidate for sending over the same connection that was used for a
3113 successful delivery of some other message. This seems entirely
3114 reasonable: after all the message is NOT "waiting for some host".
3115 This is so "obvious" that I'm not sure why it wasn't done
3116 previously. Hope I haven't missed anything, but it can't do any
3117 harm, as the worst effect is to miss an optimization.
3119 (ii) If, despite (i), such a delivery is accidentally attempted, the
3120 routing retry time is respected, so at least it doesn't keep
3121 hammering the server.
3123 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3124 in ${readsocket because some servers need this prod.
3126 PH/32 Added some extra debug output when updating a wait-xxx database.
3128 PH/33 The hint "could be header name not terminated by colon", which has been
3129 given for certain expansion errors for a long time, was not being given
3130 for the ${if def:h_colon_omitted{... case.
3132 PH/34 The spec says: "With one important exception, whenever a domain list is
3133 being scanned, $domain contains the subject domain." There was at least
3134 one case where this was not true.
3136 PH/35 The error "getsockname() failed: connection reset by peer" was being
3137 written to the panic log as well as the main log, but it isn't really
3138 panic-worthy as it just means the connection died rather early on. I have
3139 removed the panic log writing for the ECONNRESET error when getsockname()
3142 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3143 runs only) independently of the message's sender address. This meant
3144 that, if the 4xx error was in fact related to the sender, a different
3145 message to the same recipient with a different sender could confuse
3146 things. In particular, this can happen when sending to a greylisting
3147 server, but other circumstances could also provoke similar problems.
3148 I have changed the default so that the retry time for these errors is now
3149 based a combination of the sender and recipient addresses. This change
3150 can be overridden by setting address_retry_include_sender=false in the
3153 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3154 remote server are returned as part of bounce messages. This was not
3155 happening for LMTP over a pipe (the lmtp transport), but now it is the
3156 same for both kinds of LMTP.
3158 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3159 in header lines that were in fact CNAMEs. This is no longer the case.
3161 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3162 and queue runs started by the daemon processed all messages. This has
3163 been fixed so that -R and -S can now usefully be given with -q<time>.
3165 PH/40 Import PCRE release 6.7 (fixes some bugs).
3167 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3169 PH/42 Give an error if -q is specified more than once.
3171 PH/43 Renamed the variables $interface_address and $interface_port as
3172 $received_ip_address and $received_port, to make it clear that these
3173 values apply to message reception, and not to the outgoing interface when
3174 a message is delivered. (The old names remain recognized, of course.)
3176 PH/44 There was no timeout on the connect() call when using a Unix domain
3177 socket in the ${readsocket expansion. There now is.
3179 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3180 be meaningful with "accept".
3182 SC/01 Eximstats V1.43
3183 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3185 SC/02 Eximstats V1.44
3186 Use a glob alias rather than an array ref in the generated
3187 parser. This improves both readability and performance.
3189 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3190 Collect SpamAssassin and rejection statistics.
3191 Don't display local sender or destination tables unless
3192 there is data to show.
3193 Added average volumes into the top table text output.
3195 SC/04 Eximstats V1.46
3196 Collect data on the number of addresses (recipients)
3197 as well as the number of messages.
3199 SC/05 Eximstats V1.47
3200 Added 'Message too big' to the list of mail rejection
3201 reasons (thanks to Marco Gaiarin).
3203 SC/06 Eximstats V1.48
3204 Mainlog lines which have GMT offsets and are too short to
3205 have a flag are now skipped.
3207 SC/07 Eximstats V1.49 (Alain Williams)
3208 Added the -emptyok flag.
3210 SC/08 Eximstats V1.50
3211 Fixes for obtaining the IP address from reject messages.
3213 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3214 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3215 whitespace changes from 4.64-PH/27
3217 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3220 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3221 are found, allow negative numbers in numeric criteria)
3223 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3225 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3226 to match changes made in 4.64-PH/43
3228 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3230 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3231 "domain" is actually an IP address, and force a failure. This locks out
3232 those revolvers/nameservers that support "A-for-A" lookups, in
3233 contravention of the specifications.
3235 PH/48 When a host name was looked up from an IP address, and the subsequent
3236 forward lookup of the name timed out, the host name was left in
3237 $sender_host_name, contrary to the specification.
3239 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3240 restricted to single-key lookups, Exim was not diagnosing an error if
3241 * or *@ was used with a query-style lookup.
3243 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3245 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3246 long ago, but noone interested enough thought of it. Let's just say that
3247 the "1.1" means that there are some new functions that weren't there at
3248 some point in the past.
3250 PH/51 Error processing for expansion failure of helo_data from an smtp
3251 transport during callout processing was broken.
3253 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3254 tested/used via the -bh/-bhc/-bs options.
3256 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3257 bug, fixed in subsequent PCRE releases).
3259 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3260 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3262 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3268 SC/01 Use a glob alias rather than an array ref in eximstats generated
3269 parser. This improves both readability and performance.
3271 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3272 Don't display local sender or destination tables in eximstats unless
3273 there is data to show.
3274 Added average volumes into the eximstats top table text output.
3276 SC/03 Collect data on the number of addresses (recipients) as well
3277 as the number of messages in eximstats.
3279 TF/01 Correct an error in the documentation for the redirect router. Exim
3280 does (usually) call initgroups() when daemonizing.
3282 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3283 with consistent privilege compared to when running as a daemon.
3285 TF/03 Note in the spec that $authenticated_id is not set for local
3286 submissions from trusted users.
3288 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3289 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3291 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3292 by adding some example configuration directives to the default
3293 configuration file. A little bit of work is required to uncomment the
3294 directives and define how usernames and passwords are checked, but
3295 there is now a framework to start from.
3297 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3298 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3299 without this. I don't know how relevant this is to other LDAP libraries.
3301 PH/02 Add the verb name to the "unknown ACL verb" error.
3303 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3305 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3307 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3308 directory not expanded when it should be if an expanded home directory
3309 was set for the address (which is overridden by the transport).
3311 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3314 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3315 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3316 because it is too late at that time, and has no effect.
3318 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3319 security issue with \' (bugzilla #107). I could not use the
3320 PQescapeStringConn() function, because it needs a PGconn value as one of
3323 PH/08 When testing addresses using -bt, indicate those final addresses that
3324 are duplicates that would not cause an additional delivery. At least one
3325 person was confused, thinking that -bt output corresponded to deliveries.
3326 (Suppressing duplicates isn't a good idea as you lose the information
3327 about possibly different redirections that led to the duplicates.)
3329 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3330 systems where poll() doesn't work, in particular OS X.
3332 PH/10 Added more information to debugging output for retry time not reached.
3334 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3335 operations in malware.c.
3337 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3340 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3341 syslog_duplication set false, log lines that would normally be written
3342 both the the main log and to the reject log were not written to syslog at
3345 PH/14 In the default configuration, change the use of "message" in ACL warn
3346 statements to "add_header".
3348 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3349 not followed by a command (e.g. "seen endif").
3351 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3352 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3355 PH/17 Added extra conditions to the default value of delay_warning_condition
3359 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3360 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3361 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3364 The Auto-Submitted: and various List- headers are standardised, whereas I
3365 don't think Precedence: ever was.
3367 PH/18 Refactored debugging code in route_finduser() to show more information,
3368 in particular, the error code if getpwnam() issues one.
3370 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3371 This is apparently needed in addition to the PH/07 change above to avoid
3372 any possible encoding problems.
3374 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3375 but not after initializing Perl.
3377 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3378 output them only if debugging. By default they are written stderr,
3379 apparently, which is not desirable.
3381 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3384 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3387 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3389 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3390 authenticated or an ident call has been made. Suppress the default
3391 values for $authenticated_id and $authenticated_sender (but permit -oMai
3392 and -oMas) when testing with -bh.
3394 PH/24 Re-jigged the order of the tests in the default configuration so that the
3395 tests for valid domains and recipients precede the DNS black list and CSA
3396 tests, on the grounds that those ones are more expensive.
3398 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3399 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3400 This bug exists in every version of Exim that I still have, right back to
3403 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3404 However, an attempt to turn on case-sensitivity in a regex key by
3405 including (?-i) didn't work because the subject string was already
3406 lowercased, and the effects were non-intuitive. It turns out that a
3407 one-line patch can be used to allow (?-i) to work as expected.
3413 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3414 other effects) broke the use of negated acl sub-conditions.
3416 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3419 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3420 "Deny" causes Exim to reject the incoming connection with a 554 error.
3421 Unfortunately, if there is a major crisis, such as a disk failure,
3422 tcp-wrappers gives "deny", whereas what one would like would be some
3423 kind of temporary error. A kludge has been added to help with this.
3424 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3425 554 error is used if errno is still zero or contains ENOENT (which occurs
3426 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3429 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3431 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3432 errors. Otherwise a message that provokes a temporary error (when other
3433 messages do not) can cause a whole host to time out.
3435 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3436 addresses were routed directly to files or pipes from a redirect router.
3437 File deliveries just didn't batch; pipe deliveries might have suffered
3440 PH/06 A failure to get a lock for a hints database would erroneously always say
3441 "Failed to get write lock", even when it was really a read lock.
3443 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3444 of 0600. This has been changed to use the value of the lockfile_mode
3445 option (which defaults to 0600).
3447 PH/08 Applied small patch from the Sieve maintainer.
3449 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3450 folder from quota calculations, a direct delivery into this folder messed
3451 up the contents of the maildirsize file. This was because the regex was
3452 used only to exclude .Trash (or whatever) when the size of the mailbox
3453 was calculated. There was no check that a delivery was happening into an
3454 excluded directory. This bug has been fixed by ignoring all quota
3455 processing for deliveries into excluded directories.
3457 PH/10 Added the maildirfolder_create_regex option to appendfile.
3463 PH/01 The code for finding all the local interface addresses on a FreeBSD
3464 system running IPv6 was broken. This may well have applied to all BSD
3465 systems, as well as to others that have similar system calls. The broken
3466 code found IPv4 interfaces correctly, but gave incorrect values for the
3467 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3468 that it would not match correctly against @[] and not recognize the IPv6
3471 PH/02 The ipliteral router was not recognizing addresses of the form user@
3472 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3474 PH/03 Added disable_ipv6.
3476 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3477 decoded form, because it is most often used to construct To: headers
3478 lines in autoreplies, and the decoded form may well be syntactically
3479 invalid. However, $reply_address has leading white space removed, and all
3480 newlines turned into spaces so that the autoreply transport does not
3483 PH/05 If group was specified without a user on a router, and no group or user
3484 was specified on a transport, the group from the router was ignored.
3486 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3487 for visible compile-time settings that can be used to change these
3488 numbers, for those that want even more. Backwards compatibility with old
3489 spool files has been maintained. However, going back to a previous Exim
3490 release will lost any variables that are in spool files.
3492 PH/07 Two small changes when running in the test harness: increase delay when
3493 passing a TCP/IP connection to a new process, in case the original
3494 process has to generate a bounce, and remove special handling of
3495 127.0.0.2 (sic), which is no longer necessary.
3497 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3498 be the same on different OS.
3500 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3503 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3504 whether --show-vars was specified or not
3506 JJ/02 exipick: Added support for new ACL variable spool format introduced
3509 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3510 syntactically invalid From: or Reply-to: line, and a filter used this to
3511 generate an autoreply, and therefore failed to obtain an address for the
3512 autoreply, Exim could try to deliver to a non-existent relative file
3513 name, causing unrelated and misleading errors. What now happens is that
3514 it logs this as a hard delivery error, but does not attempt to create a
3517 PH/11 The exinext utility has a -C option for testing purposes, but although
3518 the given file was scanned by exinext itself; it wasn't being passed on
3519 when Exim was called.
3521 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3522 an end-of-file indication when reading a command response.
3524 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3525 compiled. In many other places in Exim, IPv6 addresses are always
3526 recognized, so I have changed this. It also means that IPv4 domain
3527 literals of the form [IPV4:n.n.n.n] are now always recognized.
3529 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3530 used if the router is not running as root, for example, when verifying at
3531 ACL time, or when using -bh. The debugging output from this situation was
3532 non-existent - all you got was a failure to exec. I have made two
3535 (a) Failures to set uid/gid, the current directory, or a process leader
3536 in a subprocess such as that created by queryprogram now generate
3537 suitable debugging output when -d is set.
3539 (b) The queryprogram router detects when it is not running as root,
3540 outputs suitable debugging information if -d is set, and then runs
3541 the subprocess without attempting to change uid/gid.
3543 PH/15 Minor change to Makefile for building test_host (undocumented testing
3546 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3547 additional section of a DNS packet that returns MX or SRV records.
3548 Instead, it always explicitly searches for A/AAAA records. This avoids
3549 major problems that occur when a DNS server includes only records of one
3550 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3551 fixed another bug: if SRV records were looked up and the corresponding
3552 address records were *not* found in the additional section, the port
3553 values from the SRV records were lost.
3555 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3556 using the correct key (the original address) when searching the retry
3557 rules in order to find which one to use for generating the retry hint.
3559 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3560 adding the default one. Similarly, if it contains a Reply-To: header, the
3561 errors_reply_to option, if set, is not used.
3563 PH/19 When calculating a retry time, Exim used to measure the "time since
3564 failure" by looking at the "first failed" field in the retry record. Now
3565 it does not use this if it is later than than the arrival time of the
3566 message. Instead it uses the arrival time. This makes for better
3567 behaviour in cases where some deliveries succeed, thus re-setting the
3568 "first failed" field. An example is a quota failure for a huge message
3569 when small messages continue to be delivered. Without this change, the
3570 "time since failure" will always be short, possible causing more frequent
3571 delivery attempts for the huge message than are intended.
3572 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3574 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3575 $1, $2, $3) because the numerical variables can be reset during some
3576 expansion items (e.g. "match"), thereby losing the authentication data.
3578 PH/21 Make -bV show the size of off_t variables so that the test suite can
3579 decide whether to run tests for quotas > 2G.
3581 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3582 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3583 filecount value is greater than 2G or if a quota value is greater than 2G
3584 on a system where the size of off_t is not greater than 4, a panic error
3587 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3588 never match. The debug and -bh output now contains an explicit error
3589 message indicating a malformed IPv4 address or mask.
3591 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3592 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3593 PH/23 above applies.
3595 PH/25 Do not write to syslog when running in the test harness. The only
3596 occasion when this arises is a failure to open the main or panic logs
3597 (for which there is an explicit test).
3599 PH/26 Added the /no_tell option to "control=freeze".
3601 PH/27 If a host name lookup failed very early in a connection, for example, if
3602 the IP address matched host_lookup and the reverse lookup yielded a name
3603 that did not have a forward lookup, an error message of the form "no IP
3604 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3605 could be logged. Now it outputs the IP address instead of "NULL".
3607 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3608 allows the sender and the authenticated sender to be set when
3609 submitting a message from within Exim. Since child_open_exim() is
3610 documented for local_scan(), the new function should be too.
3612 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3613 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3614 results in an empty string is now treated as unset.
3616 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3618 PH/31 Added sender_verify_fail logging option.
3620 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3621 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3622 tidied the source and removed it altogether.
3624 PH/33 When a queue run was abandoned because the load average was too high, a
3625 log line was always written; now it is written only if the queue_run log
3626 selector is set. In addition, the log line for abandonment now contains
3627 information about the queue run such as the pid. This is always present
3628 in "start" and "stop" lines but was omitted from the "abandon" line.
3630 PH/34 Omit spaces between a header name and the colon in the error message that
3631 is given when verify = headers_syntax fails (if there are lots of them,
3632 the message gets confusing).
3634 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3635 names, as there are now some PTR records that contain slashes. This check
3636 is only to protect against broken name servers that fall over on strange
3637 characters, so the fact that it applies to all lookups doesn't matter.
3639 PH/36 Now that the new test suite is complete, we can remove some of the
3640 special code in Exim that was needed for the old test suite. For example,
3641 sorting DNS records because real resolvers return them in an arbitrary
3642 order. The new test suite's fake resolver always returns records in the
3645 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3646 bounces) except when queue_only is set, to avoid logging races between
3647 the different processes.
3649 PH/38 Panic-die if .include specifies a non-absolute path.
3651 PH/39 A tweak to the "H" retry rule from its user.
3653 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3654 a label. They prevented compilation on older perls.
3656 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3657 a warning to be raised on newish perls.
3659 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3660 on queue. Changes to match documented behaviour of showing count of
3661 messages matching specified criteria.
3663 PH/40 Changed the default ident timeout from 30s to 5s.
3665 PH/41 Added support for the use of login_cap features, on those BSD systems
3666 that have them, for controlling the resources used by pipe deliveries.
3668 PH/42 The content-scanning code uses fopen() to create files in which to put
3669 message data. Previously it was not paying any attention to the mode of
3670 the files. Exim runs with umask(0) because the rest of the code creates
3671 files with open(), and sets the required mode explicitly. Thus, these
3672 files were ending up world-writeable. This was not a big issue, because,
3673 being within the spool directory, they were not world-accessible. I have
3674 created a function called modefopen, which takes an additional mode
3675 argument. It sets umask(777), creates the file, chmods it to the required
3676 mode, then resets the umask. All the relevant calls to fopen() in the
3677 content scanning code have been changed to use this function.
3679 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3680 to 24 hours. This avoids potential overflow problems when processing G
3681 and H retry rules. I suspect nobody ever tinkers with this value.
3683 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3685 PH/45 When the plaintext authenticator is running as a client, the server's
3686 challenges are checked to ensure they are valid base64 strings. By
3687 default, the authentication attempt is cancelled if an invalid string is
3688 received. Setting client_ignore_invalid_base64 true ignores these errors.
3689 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3690 they are received. Thus, the responses can be made to depend on the
3691 challenges. If an invalid string is ignored, an empty string is placed in
3694 PH/46 Messages that are created by the autoreply transport now contains a
3695 References: header, in accordance with RFCs 2822 and 3834.
3697 PH/47 Added authenticated_sender_force to the smtp transport.
3699 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3701 PH/49 Installed latest patch from the Sieve maintainer.
3703 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3704 was also set, the appendfile transport was unnecessarily scanning a
3705 directory of message files (e.g. for maildir delivery) to find the count
3706 of files (along with the size), even though it did not need this
3707 information. It now does the scan only if it needs to find either the
3708 size of the count of files.
3710 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3712 PH/52 Two bugs concerned with error handling when the smtp transport is
3715 (i) Exim was not creating retry information for temporary errors given
3716 for individual recipients after the DATA command when the smtp transport
3717 was used in LMTP mode. This meant that they could be retried too
3718 frequently, and not timed out correctly.
3720 (ii) Exim was setting the flag that allows error details to be returned
3721 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3722 recipients that were returned after the DATA command.
3724 PH/53 This is related to PH/52, but is more general: for any failing address,
3725 when detailed error information was permitted to be returned to the
3726 sender, but the error was temporary, then after the final timeout, only
3727 "retry timeout exceeded" was returned. Now it returns the full error as
3728 well as "retry timeout exceeded".
3730 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3731 do this, and (what is worse) MTAs that accept it.
3733 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3734 will now be deprecated.
3736 PH/56 New os.c-cygwin from the Cygwin maintainer.
3738 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3739 formats (previously only available in exim formats via -bpr, -bpru,
3740 and -bpra. Now also available in native and exiqgrep formats)
3742 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3743 with very large, slow to parse queues
3745 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3747 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3749 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3750 responses to authentication challenges, though it was showing the
3751 challenges; (ii) I've removed the CR characters from the debug output for
3754 PH/58 Allow for the insertion of a newline as well as a space when a string
3755 is turned into more than one encoded-word during RFC 2047 encoding. The
3756 Sieve code now uses this.
3758 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3759 data_4xx, lost_connection, tls_required.
3761 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3762 message was being sent as an SMTP response.
3764 PH/61 Add -l and -k options to exicyclog.
3766 PH/62 When verifying, if an address was redirected to one new address, so that
3767 verification continued, and the new address failed or deferred after
3768 having set something in $address_data, the value of $address_data was not
3769 passed back to the ACL. This was different to the case when no
3770 redirection occurred. The value is now passed back in both cases.
3772 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3773 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3774 use login_cap.h, so on its own it isn't the distinguishing feature. The
3775 new name refers directly to the setclassresources() function.
3777 PH/65 Added configuration files for NetBSD3.
3779 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3781 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3782 is preferred over IPv4.
3784 PH/68 The bounce_return_message and bounce_return_body options were not being
3785 honoured for bounces generated during the reception of non-SMTP messages.
3786 In particular, this applied to messages rejected by the ACL. This bug has
3787 been fixed. However, if bounce_return_message is true and bounce_return_
3788 body is false, the headers that are returned for a non-SMTP message
3789 include only those that have been read before the error was detected.
3790 (In the case of an ACL rejection, they have all been read.)
3792 PH/69 The HTML version of the specification is now built in a directory called
3793 spec_html instead of spec.html, because the latter looks like a path with
3794 a MIME-type, and this confuses some software.
3796 PH/70 Catch two compiler warnings in sieve.c.
3798 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3799 function verify_get_ident() calls ip_connect() to connect a socket, but
3800 if the "connect()" function timed out, ip_connect() used to close the
3801 socket. However, verify_get_ident() also closes the socket later, and in
3802 between Exim writes to the log, which may get opened at this point. When
3803 the socket was closed in ip_connect(), the log could get the same file
3804 descriptor number as the socket. This naturally causes chaos. The fix is
3805 not to close the socket in ip_connect(); the socket should be closed by
3806 the function that creates it. There was only one place in the code where
3807 this was missing, in the iplookup router, which I don't think anybody now
3808 uses, but I've fixed it anyway.
3810 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3811 well as to direct DNS lookups. Otherwise the handling of names in host
3812 lists is inconsistent and therefore confusing.
3818 PH/01 Two changes to the default runtime configuration:
3820 (1) Move the checks for relay_from_hosts and authenticated clients from
3821 after to before the (commented out) DNS black list checks.
3823 (2) Add control=submission to the relay_from_hosts and authenticated
3824 clients checks, on the grounds that messages accepted by these
3825 statements are most likely to be submissions.
3827 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3829 (1) Generate an error if the third argument for the ${prvs expansion is
3832 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3835 (3) Reset the variables that are obtained from the first argument of
3836 ${prvscheck and used in the second argument before leaving the code,
3837 because their memory is reclaimed, so using them afterwards may do
3840 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3841 one (it's much easier than Tom thought :-).
3843 (5) Because of (4), we can now allow for the use of $prvscheck_result
3844 inside the third argument.
3846 PH/03 For some reason, the default setting of PATH when running a command from
3847 a pipe transport was just "/usr/bin". I have changed it to
3850 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3851 anything to be listed in the output from -bV.
3853 PH/05 When a filter generated an autoreply, the entire To: header line was
3854 quoted in the delivery log line, like this:
3856 => >A.N.Other <ano@some.domain> <original@ddress> ...
3858 This has been changed so that it extracts the operative address. There
3859 may be more than one such address. If so, they are comma-separated, like
3862 => >ano@some.domain,ona@other.domain <original@ddress> ...
3864 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3865 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3866 not being looked up in the rDNS to get a host name, Exim was showing the
3867 IP address twice in Received: lines, even though the IP addresses were
3868 identical. For example:
3870 Received: from [1.2.3.4] (helo=[1.2.3.4])
3872 However, if the real host name was known, it was omitting the HELO data
3873 if it matched the actual IP address. This has been tidied up so that it
3874 doesn't show the same IP address twice.
3876 PH/07 When both +timestamp and +memory debugging was on, the value given by
3877 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3878 called by the debug printing, thereby overwriting the timestamp buffer.
3879 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3881 PH/08 When the original message was included in an autoreply transport, it
3882 always said "this is a copy of the message, including all the headers",
3883 even if body_only or headers_only was set. It now gives an appropriate
3886 PH/09 Applied a patch from the Sieve maintainer which:
3888 o fixes some comments
3889 o adds the (disabled) notify extension core
3890 o adds some debug output for the result of if/elsif tests
3891 o points to the current vacation draft in the documentation
3892 and documents the missing references header update
3896 o fixes a bug in processing the envelope test (when testing
3897 multiple envelope elements, the last element determined the
3900 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3901 Electronic Mail") by including:
3903 Auto-submitted: auto-generated
3905 in the messages that it generates (bounce messages and others, such as
3906 warnings). In the case of bounce messages for non-SMTP messages, there was
3907 also a typo: it was using "Auto_submitted" (underscore instead of
3908 hyphen). Since every message generated by Exim is necessarily in response
3909 to another message, thes have all been changed to:
3911 Auto-Submitted: auto-replied
3913 in accordance with these statements in the RFC:
3915 The auto-replied keyword:
3917 - SHOULD be used on messages sent in direct response to another
3918 message by an automatic process,
3920 - MUST NOT be used on manually-generated messages,
3922 - MAY be used on Delivery Status Notifications (DSNs) and Message
3923 Disposition Notifications (MDNs),
3925 - MUST NOT be used on messages generated by automatic or periodic
3926 processes, except for messages which are automatic responses to
3929 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3930 to the default Received: header definition.
3932 PH/12 Added log selector acl_warn_skipped (default on).
3934 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3935 variables because (a) they are in the wrong storage pool and (b) even if
3936 they were copied, it wouldn't work properly because of the caching.
3938 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3939 checking when decoding. Apparently there are clients that generate
3940 overlong encoded strings. Why am I not surprised?
3942 PH/15 If the first argument of "${if match_address" was not empty, but did not
3943 contain an "@" character, Exim crashed. Now it writes a panic log message
3944 and treats the condition as false.
3946 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3948 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3949 extension "envelope-auth". The code is finished and in agreement with
3950 other implementations, but there is no documentation so far and in fact,
3951 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3952 not changing the active code.
3954 Print executed "if" and "elsif" statements when debugging is used. This
3955 helps a great deal to understand what a filter does.
3957 Document more things not specified clearly in RFC3028. I had all this
3958 sorted out, when out of a sudden new issues came to my mind. Oops."
3960 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3963 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3964 canonical form (as documented). However, after a host name lookup from
3965 the IP address, check_host() was doing a simple string comparison with
3966 addresses acquired from the DNS when checking that the found name did
3967 have the original IP as one of its addresses. Since any found IPv6
3968 addresses are likely to be in abbreviated form, the comparison could
3969 fail. Luckily, there already exists a function for doing the comparison
3970 by converting both addresses to binary, so now that is used instead of
3971 the text comparison.
3973 PH/20 There was another similar case to PH/19, when a complete host name was
3974 given in a host list; looking up its IP address could give an abbreviated
3975 form, whereas the current host's name might or might not be abbreviated.
3976 The same fix has been applied.
3982 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3983 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3986 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3987 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3989 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3991 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3992 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3993 Also, for "Auto-Submitted", treat anything other than "no" as
3994 non-personal, in accordance with RFC 3834. (Previously it treated
3995 anything starting "auto-" as non-personal.)
3997 TF/01 The control=submission/name=... option had a problem with syntax
3998 errors if the name included a slash character. The /name= option
3999 now slurps the rest of the string, so it can include any characters
4000 but it must come last in the list of options (after /sender_retain
4003 PH/05 Some modifications to the interface to the fake nameserver for the new
4011 TK/01 Added the "success_on_redirect" address verification option. See
4012 NewStuff for rationale and an example.
4014 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4016 PH/02 Patch to exigrep to allow it to work on syslog lines.
4018 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4019 fread() to skip over the body file's header line, because in Cygwin the
4020 header line is locked and is inaccessible.
4022 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4023 co-exist for some time) to make it clear that it is the Exim ID that is
4024 referenced, not the Message-ID: header line.
4026 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4027 string_format() function, because snprintf() does not exist on all
4030 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4031 ${stat: expansion item.
4033 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4034 protocol synchronization error", to keep the pedants happy.
4036 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4037 well as for IRIX systems, when gcc is being used. See the host.c source
4040 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4042 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4045 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4046 transport and to the smtp transport in LMTP mode.
4048 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4050 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4051 run a filter in a subprocess. This could lead to confusion in subsequent
4052 lookups in the parent process. There should also be a search_tidyup() at
4053 the end of the subprocess.
4055 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4056 only if the host matched helo_try_verify_hosts, which caused the
4057 verification to occur when the EHLO/HELO command was issued. The ACL just
4058 tested the remembered result. Now, if a previous verification attempt has
4059 not happened, "verify = helo" does it there and then.
4061 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4063 TK/03 Fix log output including CR from clamd.
4065 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4066 exist provoked a memory error which could cause a segfault.
4068 PH/15 Installed PCRE 6.2
4070 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4072 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4073 of the problem. Specifically, suggested +O2 rather than +O1 for the
4076 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4078 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4079 record, the port was not correctly logged when the outgoing_port log
4080 selector was set (it logged the transort's default port).
4082 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4083 fallback_hosts, and "hosts" in the smtp transport.
4085 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4086 host errors such as "Connection refused".
4088 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4089 authentication with radiusclient 0.4.9:
4091 - Error returned from rc_read_config was caught wrongly
4092 - Username/password not passed on to radius server due to wrong length.
4094 The presumption is that some radiusclient API changes for 4.51/PH/17
4095 were not taken care of correctly. The code is still untested by me (my
4096 Linux distribution still has 0.3.2 of radiusclient), but it was
4097 contributed by a Radius user.
4099 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4100 expanding the "port" option of the smtp transport.
4102 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4103 while reading a MIME header. Thanks to Tom Hughes for a patch.
4105 PH/24 Include config.h inside local_scan.h so that configuration settings are
4108 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4109 that in an ACL for RCPT (for example), you can examine exactly what was
4112 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4113 commands, but it was not correctly comparing the address with the actual
4114 client host address. Thus, it would show the EHLO address in Received:
4115 header lines when this was not necessary.
4117 PH/27 Added the % operator to ${eval:}.
4119 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4120 it should be ignoring failures (because with -C, for example, it has lost
4121 privilege). It wasn't ignoring creation failures other than "already
4124 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4127 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4128 because an input line was too long, either on its own, or by virtue of
4129 too many continuations, the temporary file was not being removed, and the
4130 return code was incorrect.
4132 PH/31 Missing "BOOL" in function definition in filtertest.c.
4134 PH/32 Applied Sieve patches from the maintainer.
4136 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4138 PH/33 Added "verify = not_blind".
4140 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4141 Local/Makefile (with some defaults set). These are used in built scripts
4142 such as exicyclog, but they have never been used in the exim_install
4143 script (though there are many overriding facilities there). I have
4144 arranged that the exim_install script now takes note of these two
4147 PH/35 Installed configuration files for Dragonfly.
4149 PH/36 When a locally submitted message by a trusted user did not contain a
4150 From: header, and the sender address was obtained from -f or from an SMTP
4151 MAIL command, and the trusted user did not use -F to supply a sender
4152 name, $originator_name was incorrectly used when constructing a From:
4153 header. Furthermore, $originator_name was used for submission mode
4154 messages from external hosts without From: headers in a similar way,
4155 which is clearly wrong.
4157 PH/37 Added control=suppress_local_fixups.
4159 PH/38 When log_selector = +received_sender was set, and the addition of the
4160 sender made the log line's construction buffer exactly full, or one byte
4161 less than full, an overflow happened when the terminating "\n" was
4164 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4165 when the result of a list match is failure because a DNS lookup failed.
4167 PH/40 RM_COMMAND is now used in the building process.
4169 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4170 the "build-* directories that it finds.
4172 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4173 address in a domain literal was a prefix of an interface address.
4175 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4176 when verifying a sender address, unless rewrite_headers is false.
4178 PH/44 Wrote a long comment about why errors_to addresses are verified as
4179 recipients, not senders.
4181 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4182 the ratelimit ACL was added.
4184 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4186 PH/46 Added extra information about PostgreSQL errors to the error string.
4188 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4189 avoiding the need to install special zones in a real server. This is
4190 backwards compatible; if it can't find the fake resolver, it drops back.
4191 Thus, both old and new test suites can be run.
4193 TF/02 Added util/ratelimit.pl
4195 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4196 clock is set back in time.
4198 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4199 Candler <B.Candler@pobox.com>.
4201 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4202 OK for addresses that are the result of redirections.
4204 PH/48 A number of further additions for the benefit of the new test suite,
4205 including a fake gethostbyname() that interfaces to the fake DNS resolver
4208 TF/06 The fix for widen_domains has also been applied to qualify_single and
4209 search_parents which are the other dnslookup options that can cause
4212 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4215 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4217 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4218 service" if it encountered an MX record with an empty target hostname.
4219 The message is now "an MX or SRV record indicated no SMTP service".
4221 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4222 if the DNS of the sending site is misconfigured. This is quite a
4223 common situation. This change restores the behaviour of treating a
4224 helo verification defer as a failure.
4226 PH/51 If self=fail was set on a router, the bounce message did not include the
4227 actual error message.
4233 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4235 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4236 command itself ended in error, the underlying message about the transport
4237 filter timeout was being overwritten with the pipe command error. Now the
4238 underlying error message should be appended to the second error message.
4240 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4242 PH/02 Reduce the amount of output that "make" produces by default. Full output
4243 can still be requested.
4245 PH/03 The warning log line about a condition test deferring for a "warn" verb
4246 was being output only once per connection, rather than after each
4247 occurrence (because it was using the same function as for successful
4248 "warn" verbs). This seems wrong, so I have changed it.
4250 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4251 it should not have, which might have caused a crash in the right
4252 circumstances, but probably never did.
4254 PH/04 Installed a modified version of Tony Finch's patch to make submission
4255 mode fix the return path as well as the Sender: header line, and to
4256 add a /name= option so that you can make the user's friendly name appear
4259 TF/03 Added the control = fakedefer ACL modifier.
4261 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4262 Mark Lowes for thorough testing.
4264 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4266 TK/03 Merged latest SRS patch from Miles Wilton.
4268 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4269 with the definition in sysexits.h (which is #included earlier).
4270 Fortunately, Exim does not actually use EX_OK. The code used to try to
4271 preserve the sysexits.h value, by assuming that macro definitions were
4272 scanned for macro replacements. I have been disabused of this notion,
4273 so now the code just undefines EX_OK before #including unistd.h.
4275 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4276 in the smtp transport. When a block could not be written in a single
4277 write() function, the timeout was being re-applied to each part-write.
4278 This seems wrong - if the receiver was accepting one byte at a time it
4279 would take for ever. The timeout is now adjusted when this happens. It
4280 doesn't have to be particularly precise.
4282 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4283 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4285 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4286 without a domain if the check to <postmaster@domain> fails.
4288 SC/01 Eximstats: added -xls and the ability to specify output files
4289 (patch written by Frank Heydlauf).
4291 SC/02 Eximstats: use FileHandles for outputting results.
4293 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4295 SC/04 Eximstats: fixed display of large numbers with -nvr option
4297 SC/05 Eximstats: fixed merging of reports with empty tables.
4299 SC/06 Eximstats: added the -include_original_destination flag
4301 SC/07 Eximstats: removed tabs and trailing whitespace.
4303 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4305 TK/06 MBOX spool code: Add real "From " MBOX separator line
4306 so the .eml file is really in mbox format (even though
4307 most programs do not really care). Patch from Alex Miller.
4309 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4310 The latter is generated from $received_to and is only set if the
4311 message has one envelope recipient. SA can use these headers,
4312 obviously out-of-the-box. Patch from Alex Miller.
4314 PH/08 The ${def test on a variable was returning false if the variable's
4315 value was "0", contrary to what the specification has always said!
4316 The result should be true unless the variable is empty.
4318 PH/09 The syntax error of a character other than { following "${if
4319 def:variable_name" (after optional whitespace) was not being diagnosed.
4320 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4321 accidental colon was present, for example, could give incorrect results.
4323 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4324 result is used (not including appendfile, where other changes are about
4327 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4328 This involved changing a lot of size variables from int to off_t. It
4329 should work with maildirs and everything.
4331 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4332 spamd dying while we are connected to it.
4334 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4337 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4338 function for BDB 4.3.
4340 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4342 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4343 the sources for PCRE have been re-arranged and more files are now
4346 PH/15 The code I had for printing potentially long long variables in PH/11
4347 above was not the best (it lost precision). The length of off_t variables
4348 is now inspected at build time, and an appropriate printing format (%ld
4349 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4350 to be "long long int" or "long int". This is needed for the internal
4351 formatting function string_vformat().
4353 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4354 the configuration file to be ":syslog", then the script "guesses" where
4355 the logs files are, rather than using the compiled in default. In our
4356 case the guess is not the same as the compiled default, so the script
4357 suddenly stopped working when I started to use syslog. The patch checks
4358 to see if log_file_path is "". If so, it attempts to read it from exim
4359 with no configuration file to get the compiled in version, before it
4360 falls back to the previous guessing code."
4362 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4363 implementing BATV in an Exim configuration. See NewStuff for the gory
4366 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4367 Makefile that are specific to HP-UX.
4369 PH/18 If the "use_postmaster" option was set for a recipient callout together
4370 with the "random" option, the postmaster address was used as the MAIL
4371 FROM address for the random test, but not for the subsequent recipient
4372 test. It is now used for both.
4374 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4375 patch removes a few documentation additions to RFC 3028, because the
4376 latest draft now contains them. It adds the new en;ascii-case comparator
4377 and a new error check for 8bit text in MIME parts. Comparator and
4378 require names are now matched exactly. I enabled the subaddress
4379 extension, but it is not well tested yet (read: it works for me)."
4381 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4382 rework some of the code of TK/09 above to avoid the hardwired use of
4383 "%lld" and "long long". Replaced the call to snprintf() with a call to
4386 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4387 records point to non-existent hosts", "retry timeout exceeded", and
4388 "retry time not reached for any host after a long failure period".
4390 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4391 experimental DomainKeys support:
4393 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4394 (2) On an error such as an illegally used "control", the wrong name for
4395 the control was given.
4397 These problems did NOT occur unless DomainKeys support was compiled.
4399 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4401 PH/24 Added ${if match_ip condition.
4403 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4404 databases so that it will be absolutely obvious if a crash occurs in the
4405 DB library. This is a regular occurrence (often caused by mis-matched
4408 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4409 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4410 picked up on a user's system that detects such things. There doesn't seem
4411 to be a gcc warning option for this - only an attribute that has to be
4412 put on the function's prototype. It seems that in Fedora Core 4 they have
4413 set this on a number of new functions. No doubt there will be more in due
4416 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4417 specify a transport. However, if an address that was verified by such a
4418 router was the subject of a callout, Exim crashed because it tried to
4419 read the rcpt_include_affixes from the non-existent transport. Now it
4420 just assumes that the setting of that option is false. This bug was
4421 introduced by 4.51/PH/31.
4423 PH/28 Changed -d+all to exclude +memory, because that information is very
4424 rarely of interest, but it makes the output a lot bigger. People tend to
4425 do -d+all out of habit.
4427 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4428 code in os-type was giving problems when libc.so lives in lib64, like on
4431 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4432 aren't the modern standard, and it seems that some systems' include files
4433 don't always have them. Exim was already checking for some of the newer
4434 ones like T_AAAA, and defining it itself. I've added checks for all the
4435 record types that Exim uses.
4437 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4438 not automatically generating a new one, as it is supposed to. This
4439 prevented TLS from working. If the file did exist, but contained invalid
4440 data, a new version was generated, as expected. It was only the case of a
4441 non-existent file that was broken.
4443 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4444 with a change in libdomainkeys > 0.64.
4446 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4447 from DNS. If the selector record carries the flag, it now has
4448 precedence over the domain-wide flag.
4450 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4452 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4453 the use of a port name that isn't defined in /etc/services) occurred, the
4454 message was deferred as in a normal delivery, and thus remained on the
4455 spool, instead of being failed because of the mua_wrapper setting. This
4456 is now fixed, and I tidied up some of the mua_wrapper messages at the
4459 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4460 the messages in a hash of arrays rather than using individual hashes.
4461 This is a bit cleaner and results in dramatic memory savings, albeit
4462 at a slight CPU cost.
4464 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4465 as requested by Marc Sherman.
4467 SC/10 Eximstats: added histograms for user specified patterns as requested
4470 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4472 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4473 fopen() in the content-scanning modules that did not already have it.
4479 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4480 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4482 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4484 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4486 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4487 to test Sieve filters that use "vacation".
4489 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4490 that changes the way the GnuTLS parameters are stored in the cache file.
4491 The new format can be generated externally. For backward compatibility,
4492 if the data in the cache doesn't make sense, Exim assumes it has read an
4493 old-format file, and it generates new data and writes a new file. This
4494 means that you can't go back to an older release without removing the
4497 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4498 work if there are any delivery delays because "one_time" forces the
4499 parent to be marked "delivered", so its unseen clone is never tried
4500 again. For this reason, Exim now forbids the simultaneous setting of
4503 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4504 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4505 entry if you want to know the details. The fix, however, neglected to
4506 consider the case when local delivery batching is involved. The test for
4507 "previously delivered" was not happening when checking to see if an
4508 address could be batched with a previous (undelivered) one; under
4509 certain circumstances this could lead to multiple deliveries to the same
4512 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4513 in its include files, and this causes problems building Exim.
4515 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4516 header_syntax) but Exim was just ignoring anything given after a slash.
4517 In particular, this caused confusion with an attempt to use "verify =
4518 reverse_host_lookup/defer_ok". An error is now given when options are
4519 supplied for verify items that do not have them. (Maybe reverse_host_
4520 lookup should have a defer_ok option, but that's a different point.)
4522 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4523 defined by RFC 821) to 2048, because there were problems with some AUTH
4524 commands, and RFC 1869 says the size should be increased for extended
4525 SMTP commands that take arguments.
4527 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4530 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4531 "unknown" error; now it says that the functionality isn't in the binary.
4533 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4534 an address' error message when a string expansion fails (syntax or
4535 whatever). Otherwise the password may appear in the log. Following change
4536 PH/42 below, there is no longer a chance of it appearing in a bounce
4539 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4541 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4542 of its addresses was ever tried. (Bugzilla bug #2.)
4544 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4545 the result incorrectly in the debug output. (It correctly added a newline
4546 to what was transported.)
4548 TF/01 Added $received_time.
4550 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4551 commented out examples of how to interface to a virus scanner and to
4552 SpamAssassin. Also added commented examples of av_scanner and
4553 spamd_address settings.
4555 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4556 and controls are allowed in which ACLs. There were a couple of minor
4557 errors. Some of the entries in the conditions table (which is a table of
4558 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4559 negation of where the condition IS allowed.
4561 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4563 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4564 header file does not have a version number, so I've had to invent a new
4565 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4566 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4567 radiusclient), but it was contributed by a Radius user.
4569 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4570 files or directories, for OpenSSL.
4572 PH/19 When an Exim process that is running as root has to create an Exim log
4573 file, it does so in a subprocess that runs as exim:exim so as to get the
4574 ownership right at creation (otherwise, other Exim processes might see
4575 the file with the wrong ownership). There was no test for failure of this
4576 fork() call, which would lead to the process getting stuck as it waited
4577 for a non-existent subprocess. Forks do occasionally fail when resources
4578 run out. I reviewed all the other calls to fork(); they all seem to check
4581 PH/20 When checking for unexpected SMTP input at connect time (before writing
4582 the banner), Exim was not dealing correctly with a non-positive return
4583 from the read() function. If the client had disconnected by this time,
4584 the result was a log entry for a synchronization error with an empty
4585 string after "input=" when read() returned zero. If read() returned -1
4586 (an event I could not check), uninitialized data bytes were printed.
4587 There were reports of junk text (parts of files, etc) appearing after
4590 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4592 PH/22 Added support for macro redefinition, and (re)definition in between
4593 driver and ACL definitions.
4595 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4596 forgetting to use the resulting value; it was using the unexpanded value.
4598 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4599 hadn't been configured. The fix is from Juergen Kreileder, who
4600 understands it better than I do:
4602 "Here's what I see happening with three configured cyrus_sasl
4603 authenticators configured (plain, login, cram-md5):
4605 On startup auth_cyrus_sasl_init() gets called for each of these.
4606 This means three calls to sasl_listmech() without a specified mech_list.
4607 => SASL tests which mechs of all available mechs actually work
4608 => three warnings about OTP not working
4609 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4611 With the patch, sasl_listmech() also gets called three times. But now
4612 SASL's mech_list option is set to the server_mech specified in the the
4613 authenticator. Or in other words, the answer from sasl_listmech()
4614 gets limited to just the mech you're testing for (which is different
4616 => the return list contains just 'plain' or 'login', 'cram-md5' or
4617 nothing depending on the value of ob->server_mech.
4619 I've just tested the patch: Authentication still works fine,
4620 unavailable mechs specified in the exim configuration are still
4621 caught, and the auth.log warnings about OTP are gone."
4623 PH/25 When debugging is enabled, the contents of the command line are added
4624 to the debugging output, even when log_selector=+arguments is not
4627 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4628 answer is "GNU", and only if the return is "GNU/something" is the answer
4631 PH/27 $acl_verify_message is now set immediately after the failure of a
4632 verification in an ACL, and so is available in subsequent modifiers. In
4633 particular, the message can be preserved by coding like this:
4635 warn !verify = sender
4636 set acl_m0 = $acl_verify_message
4638 Previously, $acl_verify_message was set only while expanding "message"
4639 and "log_message" when a very denied access.
4641 PH/28 Modified OS/os.c-Linux with
4643 -#ifndef OS_LOAD_AVERAGE
4644 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4646 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4647 nomenclature these days.)
4649 PH/29 Installed patch from the Sieve maintainer that adds the options
4650 sieve_useraddress and sieve_subaddress to the redirect router.
4652 PH/30 In these circumstances:
4653 . Two addresses routed to the same list of hosts;
4654 . First host does not offer TLS;
4655 . First host accepts first address;
4656 . First host gives temporary error to second address;
4657 . Second host offers TLS and a TLS session is established;
4658 . Second host accepts second address.
4659 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4660 and peerdn, if requested) that were in fact used only for the second
4663 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4664 attention to any local part prefix or suffix that was matched by the
4665 router that accepted the address. It now behaves in the same way as it
4666 does for delivery: the affixes are removed from the local part unless
4667 rcpt_include_affixes is set on the transport.
4669 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4670 timeout during the DATA phase of an incoming message.
4672 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4673 applied a patch sanctioned by the Sieve maintainer.
4675 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4676 the uid or gid is negative. A case of a negative gid caused this to be
4677 noticed. The fix allows for either to be negative.
4679 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4680 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4683 PH/36 The change PH/12 above was broken. Fixed it.
4685 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4686 the grounds that routing the same address twice would always produce the
4687 same answer. This might have been true once, but it is certainly no
4688 longer true now. Routing a child address may depend on the previous
4689 routing that produced that child. Some complicated redirection strategies
4690 went wrong when messages had multiple recipients, and made Exim's
4691 behaviour dependent on the order in which the addresses were given.
4693 I have moved the duplicate checking until after the routing is complete.
4694 Exim scans the addresses that are assigned to local and remote
4695 transports, and removes any duplicates. This means that more work will be
4696 done, as duplicates will always all be routed, but duplicates are
4697 presumably rare, so I don't expect this is of any significance.
4699 For deliveries to pipes, files, and autoreplies, the duplicate checking
4700 still happens during the routing process, since they are not going to be
4703 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4704 It corrects a timeout issue with spamd. This is Ian's comment: "The
4705 background is that sometimes spamd either never reads data from a
4706 connection it has accepted, or it never writes response data. The exiscan
4707 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4708 blindly assumes that writes won't block so it may never time out."
4710 PH/39 Allow G after quota size as well as K and M.
4712 PH/40 The value set for $authenticated_id in an authenticator may not contain
4713 binary zeroes or newlines because the value is written to log lines and
4714 to spool files. There was no check on this. Now the value is run through
4715 the string_printing() function so that such characters are converted to
4716 printable escape sequences.
4718 PH/41 $message_linecount is a new variable that contains the total number of
4719 lines in the message. Compare $body_linecount, which is the count for the
4722 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4723 bounce and delay warning messages, except in certain special cases, which
4726 (a) An SMTP error message from a remote host;
4727 (b) A message specified in a :fail: redirection;
4728 (c) A message specified in a "fail" command in a system filter;
4729 (d) A message specified in a FAIL return from the queryprogram router;
4730 (e) A message specified by the cannot_route_message router option.
4732 In these cases only, Exim does include the error details in bounce and
4733 warning messages. There are also a few cases where bland messages such
4734 as "unrouteable address" or "local delivery error" are given.
4736 PH/43 $value is now also set for the "else" part of a ${run expansion.
4738 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4739 being worked on, but at least Exim now implements the latest version to
4742 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4743 process to complete was treated as a delivery failure, a timeout while
4744 writing the message to the pipe was logged, but erroneously treated as a
4745 successful delivery. Such timeouts include transport filter timeouts. For
4746 consistency with the overall process timeout, these timeouts are now
4747 treated as errors, giving rise to delivery failures by default. However,
4748 there is now a new Boolean option for the pipe transport called
4749 timeout_defer, which, if set TRUE, converts the failures into defers for
4750 both kinds of timeout. A transport filter timeout is now identified in
4753 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4754 systems where "make" and "gmake" are different, calling "gmake" at top
4755 level broke things. I've arranged for the value of $(MAKE) to be passed
4756 from the Makefile to this script so that it can call the same version of
4760 A note about Exim versions 4.44 and 4.50
4761 ----------------------------------------
4763 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4764 changes of various kinds. As a consequence, a big documentation update was
4765 needed. This delayed the release for rather longer than seemed good, especially
4766 in the light of a couple of (minor) security issues. Therefore, the changes
4767 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4768 release. So 4.44 and 4.50 are in effect two different branches that both start
4771 I have left the 4.50 change log unchanged; it contains all the changes since
4772 4.43. The change log for 4.44 is below; many of its items are identical to
4773 those for 4.50. This seems to be the most sensible way to preserve the
4774 historical information.
4780 1. Minor wording change to the doc/README.SIEVE file.
4782 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4783 computation of the current number of files was incorrect.
4785 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4786 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4789 4. Give more explanation in the error message when the command for a transport
4790 filter fails to execute.
4792 5. There are several places where Exim runs a non-Exim command in a
4793 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4794 was being done only for the command run by the queryprogram router. It is
4795 now done for all such subprocesses. The other cases are: ${run, transport
4796 filters, and the commands run by the lmtp and pipe transports.
4798 6. Added CONFIGURE_GROUP build-time option.
4800 7. Some older OS have a limit of 256 on the maximum number of file
4801 descriptors. Exim was using setrlimit() to set 1000 as a large value
4802 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4803 systems. I've change it so that if it can't get 1000, it tries for 256.
4805 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4806 was an oversight, and furthermore, ever since the addition of extra
4807 controls (e.g. 4.43/32), the checks on when to allow different forms of
4808 "control" were broken. There should now be diagnostics for all cases when a
4809 control that does not make sense is encountered.
4811 9. Added the /retain_sender option to "control=submission".
4813 10. $recipients is now available in the predata ACL (oversight).
4815 11. Tidy the search cache before the fork to do a delivery from a message
4816 received from the command line. Otherwise the child will trigger a lookup
4817 failure and thereby defer the delivery if it tries to use (for example) a
4818 cached ldap connection that the parent has called unbind on.
4820 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4821 of $address_data from the recipient verification was clobbered by the
4822 sender verification.
4824 13. The value of address_data from a sender verification is now available in
4825 $sender_address_data in subsequent conditions in the ACL statement.
4827 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4829 15. Added a new option "connect=<time>" to callout options, to set a different
4832 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4833 was its contents. (It was OK if the option was not defined at all.)
4835 17. A "Completed" log line is now written for messages that are removed from
4836 the spool by the -Mrm option.
4838 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4839 information about exactly what failed.
4841 19. Added -dd to debug only the daemon process.
4843 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4844 handles timeouts, both on the server side and network timeouts. Renamed the
4845 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4847 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4848 It is now set to "smtps".
4850 22. $host_address is now set to the target address during the checking of
4851 ignore_target_hosts.
4853 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4854 being passed; this would have caused $sender_host_name to have been used if
4855 matching the list had actually called for a host name (not very likely,
4856 since this list is usually IP addresses). A host name is now passed as
4859 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4860 code that specifies a non-restarting handler (typically sigaction() in
4861 modern systems) in an attempt to fix a rare and obscure crash bug.
4863 25. Narrowed the window for a race in the daemon that could cause it to ignore
4864 SIGCHLD signals. This is not a major problem, because they are used only to
4865 wake it up if nothing else does.
4867 26. A malformed maildirsize file could cause Exim to calculate negative values
4868 for the mailbox size or file count. Odd effects could occur as a result.
4869 The maildirsize information is now recalculated if the size or filecount
4872 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4873 support for a long time. Removed HAVE_SYS_VFS_H.
4875 28. Installed the latest version of exipick from John Jetmore.
4877 29. In an address list, if the pattern was not a regular expression, an empty
4878 subject address (from a bounce message) matched only if the pattern was an
4879 empty string. Non-empty patterns were not even tested. This was the wrong
4880 because it is perfectly reasonable to use an empty address as part of a
4881 database query. An empty address is now tested by patterns that are
4882 lookups. However, all the other forms of pattern expect the subject to
4883 contain a local part and a domain, and therefore, for them, an empty
4884 address still always fails if the pattern is not itself empty.
4886 30. Exim went into a mad DNS loop when attempting to do a callout where the
4887 host was specified on an smtp transport, and looking it up yielded more
4888 than one IP address.
4890 31. Re-factored the code for checking spool and log partition space into a
4891 function that finds that data and another that does the check. The former
4892 is then used to implement four new variables: $spool_space, $log_space,
4893 $spool_inodes, and $log_inodes.
4895 32. The RFC2047 encoding function was originally intended for short strings
4896 such as real names; it was not keeping to the 75-character limit for
4897 encoded words that the RFC imposes. It now respects the limit, and
4898 generates multiple encoded words if necessary. To be on the safe side, I
4899 have increased the buffer size for the ${rfc2047: expansion operator from
4902 33. It is now permitted to omit both strings after an "if" condition; if the
4903 condition is true, the result is "true". As before, when the second string
4904 is omitted, a false condition yields an empty string. This makes it less
4905 cumbersome to write custom ACL and router conditions.
4907 34. Failure to deliver a bounce message always caused it to be frozen, even if
4908 there was an errors_to setting on the router. The errors_to setting is now
4911 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4912 canonical form (fully expanded) before being placed in
4913 $sender_host_address.
4915 36. The table in the code that translates DNS record types into text (T_A to
4916 "A" for instance) was missing entries for NS and CNAME. It is just possible
4917 that this could have caused confusion if both these types were looked up
4918 for the same domain, because the text type is used as part of Exim's
4919 per-process caching. But the chance of anyone hitting this buglet seems
4922 37. The dnsdb lookup has been extended in a number of ways.
4924 (1) There is a new type, "zns", which walks up the domain tree until it
4925 finds some nameserver records. It should be used with care.
4927 (2) There is a new type, "mxh", which is like "mx" except that it returns
4928 just the host names, not the priorities.
4930 (3) It is now possible to give a list of domains (or IP addresses) to be
4931 looked up. The behaviour when one of the lookups defers can be
4932 controlled by a keyword.
4934 (4) It is now possible to specify the separator character for use when
4935 multiple records are returned.
4937 38. The dnslists ACL condition has been extended: it is now possible to supply
4938 a list of IP addresses and/or domains to be looked up in a particular DNS
4941 39. Added log_selector=+queue_time_overall.
4943 40. When running the queue in the test harness, wait just a tad after forking a
4944 delivery process, to get repeatability of debugging output.
4946 41. Include certificate and key file names in error message when GnuTLS fails
4947 to set them up, because the GnuTLS error message doesn't include the name
4948 of the failing file when there is a problem reading it.
4950 42. Allow both -bf and -bF in the same test run.
4952 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4954 44. The "Exiscan patch" is now merged into the mainline Exim source.
4956 45. Sometimes the final signoff response after QUIT could fail to get
4957 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4958 < 0 before doing a fflush(). This bug looks as though it goes back to the
4959 introduction of TLS in release 3.20, but "sometimes" must have been rare
4960 because the tests only now provoked it.
4962 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4963 (this can affect the format of dates).
4965 47. exim_tidydb, when checking for the continued existence of a message for
4966 which it has found a message-specific retry record, was not finding
4967 messages that were in split spool directories. Consequently, it was
4968 deleting retry records that should have stayed in existence.
4970 48. Steve fixed some bugs in eximstats.
4972 49. The SPA authentication driver was not abandoning authentication and moving
4973 on to the next authenticator when an expansion was forced to fail,
4974 contradicting the general specification for all authenticators. Instead it
4975 was generating a temporary error. It now behaves as specified.
4977 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4978 (the order specifies the preference for clients). The order is now AES256,
4979 AES128, 3DES, ARCFOUR128.
4981 51. Small patch to Sieve code - explicitly set From: when generating an
4984 52. Exim crashed if a remote delivery caused a very long error message to be
4985 recorded - for instance if somebody sent an entire SpamAssassin report back
4986 as a large number of 550 error lines. This bug was coincidentally fixed by
4987 increasing the size of one of Exim's internal buffers (big_buffer) that
4988 happened as part of the Exiscan merge. However, to be on the safe side, I
4989 have made the code more robust (and fixed the comments that describe what
4992 53. Now that there can be additional text after "Completed" in log lines (if
4993 the queue_time_overall log selector is set), a one-byte patch to exigrep
4994 was needed to allow it to recognize "Completed" as not the last thing in
4997 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4998 patch that reportedly fixes this has been added. I am not expert enough to
4999 create a test for it. This is what the patch creator wrote:
5001 "I found a little strange behaviour of ldap code when working with
5002 Windows 2003 AD Domain, where users was placed in more than one
5003 Organization Units. When I tried to give exim partial DN, the exit code
5004 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5005 But simultaneously result of request was absolutely normal ldap result,
5006 so I produce this patch..."
5008 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5009 REFERENCE, so I have modified the code to exclude the patch when that macro
5012 55. Some experimental protocols are using DNS PTR records for new purposes. The
5013 keys for these records are domain names, not reversed IP addresses. The
5014 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5015 leaves it alone. Component reversal etc. now happens only for IP addresses.
5018 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5020 57. Double the size of the debug message buffer (to 2048) so that more of very
5021 long debug lines gets shown.
5023 58. The exicyclog utility now does better if the number of log files to keep
5024 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5026 59. Two changes related to the smtp_active_hostname option:
5028 (1) $smtp_active_hostname is now available as a variable.
5029 (2) The default for smtp_banner uses $smtp_active_hostname instead
5030 of $primary_hostname.
5032 60. The host_aton() function is supposed to be passed a string that is known
5033 to be a valid IP address. However, in the case of IPv6 addresses, it was
5034 not checking this. This is a hostage to fortune. Exim now panics and dies
5035 if the condition is not met. A case was found where this could be provoked
5036 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5037 components; fortuitously, this particular loophole had already been fixed
5038 by change 4.50/55 above.
5040 If there are any other similar loopholes, the new check in host_aton()
5041 itself should stop them being exploited. The report I received stated that
5042 data on the command line could provoke the exploit when Exim was running as
5043 exim, but did not say which command line option was involved. All I could
5044 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5045 running as the user.
5048 61. There was a buffer overflow vulnerability in the SPA authentication code
5049 (which came originally from the Samba project). I have added a test to the
5050 spa_base64_to_bits() function which I hope fixes it.
5053 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5054 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5056 63. The daemon start-up calls getloadavg() while still root for those OS that
5057 need the first call to be done as root, but it missed one case: when
5058 deliver_queue_load_max is set with deliver_drop_privilege. This is
5059 necessary for the benefit of the queue runner, because there is no re-exec
5060 when deliver_drop_privilege is set.
5062 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5063 This has been fixed.
5065 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5066 was in use, was not putting the data itself into the right store pool;
5067 consequently, it could be overwritten for a subsequent message in the same
5068 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5071 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5073 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5074 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5075 the function were treating the return as a boolean value, which happened to
5076 work because 0=false and not-0=true, but is not correct code.
5078 68. The host_aton() function was not handling scoped IPv6 addresses (those
5079 with, for example, "%eth0" on the end) correctly.
5081 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5082 negated items (that is, ~something) in unsigned ints. Some compilers
5083 apparently mutter when there is no cast.
5085 70. If an address verification called from an ACL failed, and did not produce a
5086 user-specific message (i.e. there was only a "system" message), nothing was
5087 put in $acl_verify_message. In this situation, it now puts the system
5090 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5091 session; change 4.31/43 added the unwanted input to the log line - except
5092 that it did not do this in the start of session case. It now does.
5094 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5095 This is wrong and can cause the other end to generate a synchronization
5096 error if it is another Exim or anything else that does the synchronization
5097 check. A QUIT command is no longer sent after a timeout.
5099 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5100 during host lookups.
5102 74. The defer_ok option of callout verification was not working if it was used
5103 when verifying addresses in header lines, that is, for this case:
5105 verify = header_sender/callout=defer_ok
5107 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5108 those file descriptors could be used for SMTP connections. If anything
5109 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5110 could be sent to the SMTP client, causing chaos. The daemon now opens
5111 stdin, stdout, and stderr to /dev/null when it puts itself into the
5114 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5115 log by default. The user can override this with suitable Perl magic.
5117 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5118 the log message when discard triggers, was not working for the DATA ACL or
5119 for the non-SMTP ACL.
5121 78. Error message wording change in sieve.c.
5123 79. If smtp_accept_max_per_host was set, the number of connections could be
5124 restricted to fewer than expected, because the daemon was trying to set up
5125 a new connection before checking whether the processes handling previous
5126 connections had finished. The check for completed processes is now done
5127 earlier. On busy systems, this bug wouldn't be noticed because something
5128 else would have woken the daemon, and it would have reaped the completed
5131 80. If a message was submitted locally by a user whose login name contained one
5132 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5133 It caused a spool format error. I have fixed the spool reading code. A
5134 related problem was that the "from" clause in the Received: line became
5135 illegal because of the space(s). It is now covered by ${quote_local_part.
5137 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5140 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5142 83. Patch from Sieve maintainer to fix unterminated string problem in
5143 "vacation" handling.
5145 84. Some minor changes to the Linux configuration files to help with other
5146 OS variants using glibc.
5148 85. One more patch for Sieve to update vacation handling to latest spec.
5151 ----------------------------------------------------
5152 See the note above about the 4.44 and 4.50 releases.
5153 ----------------------------------------------------
5159 1. Change 4.43/35 introduced a bug that caused file counts to be
5160 incorrectly computed when quota_filecount was set in an appendfile
5163 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5164 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5167 3. Give more explanation in the error message when the command for a transport
5168 filter fails to execute.
5170 4. There are several places where Exim runs a non-Exim command in a
5171 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5172 was being done only for the command run by the queryprogram router. It is
5173 now done for all such subprocesses. The other cases are: ${run, transport
5174 filters, and the commands run by the lmtp and pipe transports.
5176 5. Some older OS have a limit of 256 on the maximum number of file
5177 descriptors. Exim was using setrlimit() to set 1000 as a large value
5178 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5179 systems. I've change it so that if it can't get 1000, it tries for 256.
5181 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5182 was an oversight, and furthermore, ever since the addition of extra
5183 controls (e.g. 4.43/32), the checks on when to allow different forms of
5184 "control" were broken. There should now be diagnostics for all cases when a
5185 control that does not make sense is encountered.
5187 7. $recipients is now available in the predata ACL (oversight).
5189 8. Tidy the search cache before the fork to do a delivery from a message
5190 received from the command line. Otherwise the child will trigger a lookup
5191 failure and thereby defer the delivery if it tries to use (for example) a
5192 cached ldap connection that the parent has called unbind on.
5194 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5195 of $address_data from the recipient verification was clobbered by the
5196 sender verification.
5198 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5199 was its contents. (It was OK if the option was not defined at all.)
5201 11. A "Completed" log line is now written for messages that are removed from
5202 the spool by the -Mrm option.
5204 12. $host_address is now set to the target address during the checking of
5205 ignore_target_hosts.
5207 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5208 being passed; this would have caused $sender_host_name to have been used if
5209 matching the list had actually called for a host name (not very likely,
5210 since this list is usually IP addresses). A host name is now passed as
5213 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5214 code that specifies a non-restarting handler (typically sigaction() in
5215 modern systems) in an attempt to fix a rare and obscure crash bug.
5217 15. Narrowed the window for a race in the daemon that could cause it to ignore
5218 SIGCHLD signals. This is not a major problem, because they are used only to
5219 wake it up if nothing else does.
5221 16. A malformed maildirsize file could cause Exim to calculate negative values
5222 for the mailbox size or file count. Odd effects could occur as a result.
5223 The maildirsize information is now recalculated if the size or filecount
5226 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5227 support for a long time. Removed HAVE_SYS_VFS_H.
5229 18. Updated exipick to current release from John Jetmore.
5231 19. Allow an empty sender to be matched against a lookup in an address list.
5232 Previously the only cases considered were a regular expression, or an
5235 20. Exim went into a mad DNS lookup loop when doing a callout where the
5236 host was specified on the transport, if the DNS lookup yielded more than
5239 21. The RFC2047 encoding function was originally intended for short strings
5240 such as real names; it was not keeping to the 75-character limit for
5241 encoded words that the RFC imposes. It now respects the limit, and
5242 generates multiple encoded words if necessary. To be on the safe side, I
5243 have increased the buffer size for the ${rfc2047: expansion operator from
5246 22. Failure to deliver a bounce message always caused it to be frozen, even if
5247 there was an errors_to setting on the router. The errors_to setting is now
5250 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5251 canonical form (fully expanded) before being placed in
5252 $sender_host_address.
5254 24. Updated eximstats to version 1.33
5256 25. Include certificate and key file names in error message when GnuTLS fails
5257 to set them up, because the GnuTLS error message doesn't include the name
5258 of the failing file when there is a problem reading it.
5260 26. Expand error message when OpenSSL has problems setting up cert/key files.
5263 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5264 (this can affect the format of dates).
5266 28. exim_tidydb, when checking for the continued existence of a message for
5267 which it has found a message-specific retry record, was not finding
5268 messages that were in split spool directories. Consequently, it was
5269 deleting retry records that should have stayed in existence.
5271 29. eximstats updated to version 1.35
5272 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5273 1.35 - bugfix such that pie charts by volume are generated correctly
5275 30. The SPA authentication driver was not abandoning authentication and moving
5276 on to the next authenticator when an expansion was forced to fail,
5277 contradicting the general specification for all authenticators. Instead it
5278 was generating a temporary error. It now behaves as specified.
5280 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5281 (the order specifies the preference for clients). The order is now AES256,
5282 AES128, 3DES, ARCFOUR128.
5284 31. Small patch to Sieve code - explicitly set From: when generating an
5287 32. Exim crashed if a remote delivery caused a very long error message to be
5288 recorded - for instance if somebody sent an entire SpamAssassin report back
5289 as a large number of 550 error lines. This bug was coincidentally fixed by
5290 increasing the size of one of Exim's internal buffers (big_buffer) that
5291 happened as part of the Exiscan merge. However, to be on the safe side, I
5292 have made the code more robust (and fixed the comments that describe what
5295 33. Some experimental protocols are using DNS PTR records for new purposes. The
5296 keys for these records are domain names, not reversed IP addresses. The
5297 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5298 leaves it alone. Component reversal etc. now happens only for IP addresses.
5301 34. The host_aton() function is supposed to be passed a string that is known
5302 to be a valid IP address. However, in the case of IPv6 addresses, it was
5303 not checking this. This is a hostage to fortune. Exim now panics and dies
5304 if the condition is not met. A case was found where this could be provoked
5305 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5306 components; fortuitously, this particular loophole had already been fixed
5307 by change 4.50/55 or 4.44/33 above.
5309 If there are any other similar loopholes, the new check in host_aton()
5310 itself should stop them being exploited. The report I received stated that
5311 data on the command line could provoke the exploit when Exim was running as
5312 exim, but did not say which command line option was involved. All I could
5313 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5314 running as the user.
5317 35. There was a buffer overflow vulnerability in the SPA authentication code
5318 (which came originally from the Samba project). I have added a test to the
5319 spa_base64_to_bits() function which I hope fixes it.
5322 36. The daemon start-up calls getloadavg() while still root for those OS that
5323 need the first call to be done as root, but it missed one case: when
5324 deliver_queue_load_max is set with deliver_drop_privilege. This is
5325 necessary for the benefit of the queue runner, because there is no re-exec
5326 when deliver_drop_privilege is set.
5328 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5329 was in use, was not putting the data itself into the right store pool;
5330 consequently, it could be overwritten for a subsequent message in the same
5331 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5334 38. Sometimes the final signoff response after QUIT could fail to get
5335 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5336 < 0 before doing a fflush(). This bug looks as though it goes back to the
5337 introduction of TLS in release 3.20, but "sometimes" must have been rare
5338 because the tests only now provoked it.
5344 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5345 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5346 Now it returns an integer. A number of calls were still expecting a T/F
5347 return. Fortuitously, in all cases, the tests worked in OK situations,
5348 which is the norm. However, things would have gone wrong on any write
5349 failures on the smtp file descriptor. This function is used when sending
5350 messages over SMTP and also when doing verify callouts.
5352 2. When Exim is called to do synchronous delivery of a locally submitted
5353 message (the -odf or -odi options), it no longer closes stderr before doing
5356 3. Implemented the mua_wrapper option.
5358 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5360 5. Implemented the functions header_remove(), header_testname(),
5361 header_add_at_position(), and receive_remove_recipient(), and exported them
5364 6. If an ACL "warn" statement specified the addition of headers, Exim already
5365 inserted X-ACL-Warn: at the start if there was no header name. However, it
5366 was not making this test for the second and subsequent header lines if
5367 there were newlines in the string. This meant that an invalid header could
5368 be inserted if Exim was badly configured.
5370 7. Allow an ACL "warn" statement to add header lines at the start or after all
5371 the Received: headers, as well as at the end.
5373 8. Added the rcpt_4xx retry error code.
5375 9. Added postmaster_mailfrom=xxx to callout verification option.
5377 10. Added mailfrom=xxxx to the callout verification option, for verify=
5380 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5381 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5383 12. Inserted some casts to stop certain compilers warning when using pointer
5384 differences as field lengths or precisions in printf-type calls (mostly
5385 affecting debugging statements).
5387 13. Added optional readline() support for -be (dynamically loaded).
5389 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5390 same clock tick as a message's arrival, so that its received time was the
5391 same as the "first fail" time on the retry record, and that message
5392 remained on the queue past the ultimate address timeout, every queue runner
5393 would try a delivery (because it was past the ultimate address timeout) but
5394 after another failure, the ultimate address timeout, which should have then
5395 bounced the address, did not kick in. This was a "< instead of <=" error;
5396 in most cases the first failure would have been in the next clock tick
5397 after the received time, and all would be well.
5399 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5400 being recognized when the domain list was tested by the match_domain
5401 condition in an expansion string.
5403 16. Added the ${str2b64: operator.
5405 17. Exim was always calling setrlimit() to set a large limit for the number of
5406 processes, without checking whether the existing limit was already
5407 adequate. (It did check for the limit on file descriptors.) Furthermore,
5408 errors from getrlimit() and setrlimit() were being ignored. Now they are
5409 logged to the main and panic logs, but Exim does carry on, to try to do its
5410 job under whatever limits there are.
5412 18. Imported PCRE 5.0.
5414 19. Trivial typo in log message " temporarily refused connection" (the leading
5417 20. If the log selector return_path_on_delivery was set and an address was
5418 redirected to /dev/null, the delivery process crashed because it assumed
5419 that a return path would always be set for a "successful" delivery. In this
5420 case, the whole delivery is bypassed as an optimization, and therefore no
5423 21. Internal re-arrangement: the function for sending a challenge and reading
5424 a response while authentication was assuming a zero-terminated challenge
5425 string. It's now changed to take a pointer and a length, to allow for
5426 binary data in such strings.
5428 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5430 23. Exim was not respecting finduser_retries when seeking the login of the
5431 uid under which it was called; it was always trying 10 times. (The default
5432 setting of finduser_retries is zero.) Also, it was sleeping after the final
5433 failure, which is pointless.
5435 24. Implemented tls_on_connect_ports.
5437 25. Implemented acl_smtp_predata.
5439 26. If the domain in control=submission is set empty, Exim assumes that the
5440 authenticated id is a complete email address when it generates From: or
5441 Sender: header lines.
5443 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5444 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5445 chown and chgrp in /bin and hostname in /usr/bin.
5447 28. Exim was keeping the "process log" file open after each use, just as it
5448 does for the main log. This opens the possibility of it remaining open for
5449 long periods when the USR1 signal hits a daemon. Occasional processlog
5450 errors were reported, that could have been caused by this. Anyway, it seems
5451 much more sensible not to leave this file open at all, so that is what now
5454 29. The long-running daemon process does not normally write to the log once it
5455 has entered its main loop, and it closes the log before doing so. This is
5456 so that log files can straightforwardly be renamed and moved. However,
5457 there are a couple of unusual error situations where the daemon does write
5458 log entries, and I had neglected to close the log afterwards.
5460 30. The text of an SMTP error response that was received during a remote
5461 delivery was being truncated at 512 bytes. This is too short for some of
5462 the long messages that one sometimes sees. I've increased the limit to
5465 31. It is now possible to make retry rules that apply only when a message has a
5466 specific sender, in particular, an empty sender.
5468 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5469 it possible to be selective about when SMTP synchronization is enforced.
5471 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5473 32. Implemented hosts_connection_nolog.
5475 33. Added an ACL for QUIT.
5477 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5480 35. Added mailbox_size and mailbox_filecount to appendfile.
5482 36. Added control = no_multiline_responses to ACLs.
5484 37. There was a bug in the logic of the code that waits for the clock to tick
5485 in the case where the clock went backwards by a substantial amount such
5486 that the microsecond fraction of "now" was more than the microsecond
5487 fraction of "then" (but the whole seconds number was less).
5489 38. Added support for the libradius Radius client library this is found on
5490 FreeBSD (previously only the radiusclient library was supported).
5496 1. When certain lookups returned multiple values in the form name=value, the
5497 quoting of the values was not always being done properly. Specifically:
5498 (a) If the value started with a double quote, but contained no whitespace,
5500 (b) If the value contained whitespace other than a space character (i.e.
5501 tabs or newlines or carriage returns) it was not quoted.
5502 This fix has been applied to the mysql and pgsql lookups by writing a
5503 separate quoting function and calling it from the lookup code. The fix
5504 should probably also be applied to nisplus, ibase and oracle lookups, but
5505 since I cannot test any of those, I have not disturbed their existing code.
5507 2. A hit in the callout cache for a specific address caused a log line with no
5508 reason for rejecting RCPT. Now it says "Previous (cached) callout
5509 verification failure".
5511 3. There was an off-by-one bug in the queryprogram router. An over-long
5512 return line was truncated at 256 instead of 255 characters, thereby
5513 overflowing its buffer with the terminating zero. As well as fixing this, I
5514 have increased the buffer size to 1024 (and made a note to document this).
5516 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5517 when Exim is waiting for an SMTP response from a remote server, Exim
5518 restarts its select() call on the socket, thereby resetting its timeout.
5519 This is not a problem when such interrupts are rare. Somebody set up a cron
5520 job to run exiwhat every 2 minutes, which is less than the normal select()
5521 timeout (5 or 10 minutes). This meant that the select() timeout never
5522 kicked in because it was always reset. I have fixed this by comparing the
5523 time when an interrupt arrives with the time at the start of the first call
5524 to select(). If more time than the timeout has elapsed, the interrupt is
5525 treated as a timeout.
5527 5. Some internal re-factoring in preparation for the addition of Sieve
5528 extensions (by MH). In particular, the "personal" test is moved to a
5529 separate function, and given an option for scanning Cc: and Bcc: (which is
5530 not set for Exim filters).
5532 6. When Exim created an email address using the login of the caller as the
5533 local part (e.g. when creating a From: or Sender: header line), it was not
5534 quoting the local part when it contained special characters such as @.
5536 7. Installed new OpenBSD configuration files.
5538 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5539 try to make them clearer.
5541 9. Callout options, other than the timeout value, were being ignored when
5542 verifying sender addresses in header lines. For example, when using
5544 verify = header_sender/callout=no_cache
5546 the cache was (incorrectly) being used.
5548 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5549 only the Cygwin environment.
5551 11. When return_path_on_delivery was set as a log selector, if different remote
5552 addresses in the same message used different return paths and parallel
5553 remote delivery occurred, the wrong values would sometimes be logged.
5554 (Whenever a remote delivery process finished, the return path value from
5555 the most recently started remote delivery process was logged.)
5557 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5558 lines when AUTH and/or TLS are in use. This is the "received protocol"
5559 field. Exim used to use "asmtp" for authenticated SMTP, without any
5560 indication (in the protocol name) for TLS use. Now it follows the RFC and
5561 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5562 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5563 names appear in log lines as well as in Received: header lines.
5565 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5566 extensions, and comparison tests, and to fix some bugs.
5568 14. Changes to the "personal" filter test:
5570 (1) The test was buggy in that it was just doing the equivalent of
5571 "contains" tests on header lines. For example, if a user's address was
5572 anne@some.where, the "personal" test would incorrectly be true for
5574 To: susanne@some.where
5576 This test is now done by extracting each address from the header in turn,
5577 and checking the entire address. Other tests that are part of "personal"
5578 are now done using regular expressions (for example, to check local parts
5579 of addresses in From: header lines).
5581 (2) The list of non-personal local parts in From: addresses has been
5582 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5583 taken from the Sieve specification recommendations.
5585 (3) If the message contains any header line starting with "List-" it is
5586 treated as non-personal.
5588 (4) The test for "circular" in the Subject: header line has been removed
5589 because it now seems ill-conceived.
5591 15. Minor typos in src/EDITME comments corrected.
5593 16. Installed latest exipick from John Jetmore.
5595 17. If headers_add on a router specified a text string that was too long for
5596 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5597 of string_sprintf() is now avoided.
5599 18. $message_body_size was not set (it was always zero) when running the DATA
5600 ACL and the local_scan() function.
5602 19. For the "mail" command in an Exim filter, no default was being set for
5603 the once_repeat time, causing a random time value to be used if "once" was
5604 specified. (If the value happened to be <= 0, no repeat happened.) The
5605 default is now 0s, meaning "never repeat". The "vacation" command was OK
5606 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5607 (I found it when inspecting the code).
5609 20. There is now an overall timeout for performing a callout verification. It
5610 defaults to 4 times the callout timeout, which applies to individual SMTP
5611 commands during the callout. The overall timeout applies when there is more
5612 than one host that can be tried. The timeout is checked before trying the
5613 next host. This prevents very long delays if there are a large number of
5614 hosts and all are timing out (e.g. when the network connections are timing
5615 out). The value of the overall timeout can be changed by specifying an
5616 additional sub-option for "callout", called "maxwait". For example:
5618 verify = sender/callout=5s,maxwait=20s
5620 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5621 to the end before writing, but this should make it even safer).
5623 22. Exim was forgetting that it had advertised PIPELINING for the second and
5624 subsequent messages on an SMTP connection. It was also not resetting its
5625 memory on STARTTLS and an internal HELO.
5627 23. When Exim logs an SMTP synchronization error within a session, it now
5628 records whether PIPELINING has been advertised or not.
5630 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5631 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5632 rather than long int.
5634 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5636 26. Added the never_mail option to autoreply.
5642 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5643 crash if the getsockname() call failed; this can happen if a connection is
5644 closed very soon after it is established. The problem was simply in the
5645 order in which certain operations were done, causing Exim to try to write
5646 to the SMTP stream before it had set up the file descriptor. The bug has
5647 been fixed by making things happen in the correct order.
5653 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5654 before the connection was closed, thus losing the rejection response.
5656 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5657 some early Solaris releases, but causes trouble in current releases where
5658 socklen_t is defined.
5660 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5663 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5666 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5667 that releasing the top of it at the end releases what was used for sub-
5668 expansions (unless the block got too big). However, discard this block if
5669 the first thing is a variable or header, so that we can use its block when
5670 it is dynamic (useful for very large $message_headers, for example).
5672 6. Lookups now cache *every* query, not just the most recent. A new, separate
5673 store pool is used for this. It can be recovered when all lookup caches are
5674 flushed. Lookups now release memory at the end of their result strings.
5675 This has involved some general refactoring of the lookup sources.
5677 7. Some code has been added to the store_xxx() functions to reduce the amount
5678 of flapping under certain conditions.
5680 8. log_incoming_interface used to affect only the <= reception log lines. Now
5681 it causes the local interface and port to be added to several more SMTP log
5682 lines, for example "SMTP connection from", and rejection lines.
5684 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5686 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5688 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5689 could be overwritten at the end of the current message (or the start of a
5690 new message if it was set in a HELO ACL). The value is now preserved for
5691 the duration of the SMTP connection.
5693 12. If a transport had a headers_rewrite setting, and a matching header line
5694 contained an unqualified address, that address was qualified, even if it
5695 did not match any rewriting rules. The underlying bug was that the values
5696 of the flags that permit the existence of unqualified sender and recipient
5697 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5698 non-local messages, and by -bnq for local messages) were not being
5699 preserved with the message after it was received.
5701 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5702 "next input=" as part of the text comprising the host identity instead of
5703 the correct text. The code was using the same buffer for two different
5704 strings. However, depending on which order the printing function evaluated
5705 its arguments, the bug did not always show up. Under Linux, for example, my
5706 test suite worked just fine.
5708 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5709 doesn't work with some older versions of Perl. It has been changed to "my",
5710 which in any case is probably the better facility to use.
5712 15. A really picky compiler found some instances of statements for creating
5713 error messages that either had too many or two few arguments for the format
5716 16. The size of the buffer for calls to the DNS resolver has been increased
5717 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5718 for addresses that have a lot of PTR records. This alleviates a problem; it
5719 does not fully solve it.
5721 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5722 buffer now truncates the list and logs the incident, which is the same
5723 action as happens when Exim is looking up a host name and its aliases.
5724 Previously in this situation something unpredictable would happen;
5725 sometimes it was "internal error: store_reset failed".
5727 18. If a server dropped the connection unexpectedly when an Exim client was
5728 using GnuTLS and trying to read a response, the client delivery process
5729 crashed while trying to generate an error log message.
5731 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5732 string, for example:
5734 warn message = H1: something\nH2: something
5736 the text was added as a single header line from Exim's point of view
5737 though it ended up OK in the delivered message. However, searching for the
5738 second and subsequent header lines using $h_h2: did not work. This has been
5739 fixed. Similarly, if a system filter added multiple headers in this way,
5740 the routers could not see them.
5742 20. Expanded the error message when iplsearch is called with an invalid key to
5743 suggest using net-iplsearch in a host list.
5745 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5746 ACLs are no longer actually imposed (and a message to that effect is
5749 22. If a "gecos" field in a passwd entry contained escaped characters, in
5750 particular, if it contained a \" sequence, Exim got it wrong when building
5751 a From: or a Sender: header from that name. A second bug also caused
5752 incorrect handling when an unquoted " was present following a character
5753 that needed quoting.
5755 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5756 was not being matched caselessly.
5758 24. Arranged for all hyphens in the exim.8 source to be escaped with
5761 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5762 properly. Recipient callout cache records were still being keyed to include
5763 the sender, even when use_sender was set false. This led to far more
5764 callouts that were necessary. The sender is no longer included in the key
5765 when use_sender is false.
5767 26. Added "control = submission" modifier to ACLs.
5769 27. Added the ${base62d: operator to decode base 62 numbers.
5771 28. dnsdb lookups can now access SRV records.
5773 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5774 the configuration file.
5776 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5777 (-v) mode. This makes the output for a verbose queue run more intelligible.
5779 31. Added a use_postmaster feature to recipient callouts.
5781 32. Added the $body_zerocount variable, containing the number of binary zero
5782 bytes in the message body.
5784 33. The time of last modification of the "new" subdirectory is now used as the
5785 "mailbox time last read" when there is a quota error for a maildir
5788 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5790 35. Added +ignore_unknown as a special item in host lists.
5792 36. Code for decoding IPv6 addresses in host lists is now included, even if
5793 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5794 address was recognized as an IP address, but was then not correctly decoded
5795 into binary, causing unexpected and incorrect effects when compared with
5802 1. Very minor rewording of debugging text in manualroute to say "list of
5803 hosts" instead of "hostlist".
5805 2. If verify=header_syntax was set, and a header line with an unqualified
5806 address (no domain) and a large number of spaces between the end of the
5807 name and the colon was received, the reception process suffered a buffer
5808 overflow, and (when I tested it) crashed. This was caused by some obsolete
5809 code that should have been removed. The fix is to remove it!
5811 3. When running in the test harness, delay a bit after writing a bounce
5812 message to get a bit more predictability in the log output.
5814 4. Added a call to search_tidyup() just before forking a reception process. In
5815 theory, someone could use a lookup in the expansion of smtp_accept_max_
5816 per_host which, without the tidyup, could leave open a database connection.
5818 5. Added the variables $recipient_data and $sender_data which get set from a
5819 lookup success in an ACL "recipients" or "senders" condition, or a router
5820 "senders" option, similar to $domain_data and $local_part_data.
5822 6. Moved the writing of debug_print from before to after the "senders" test
5825 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5826 problems for message scanning, either using a data ACL, or using
5827 local_scan() because the Received: header was not generated till after they
5828 were called (in order to set the time as the time of reception completion).
5829 I have revised the way this works. The header is now generated after the
5830 body is received, but before the ACL or local_scan() are called. After they
5831 are run, the timestamp in the header is updated.
5837 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5838 before starting a queue runner without re-exec. This happened only when
5839 deliver_drop_privilege was set or when the Exim user was set to root. The
5840 effect of the bug was that timeouts during subsequent deliveries caused
5841 crashes instead of being properly handled. The handler is now left at its
5842 default (and expected) setting.
5844 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5845 message, again when deliver_drop_privilege is set or Exim is run as root.
5846 The bug described in (1) was not present in this case, but the tidying up
5847 of the other signals was missing. I have made the two cases consistent.
5849 3. The ignore_target_hosts setting on a manualroute router was being ignored
5850 for hosts that were looked up using the /MX notation.
5852 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5855 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5856 operated on the sender address. After changing the $sender_address to <>
5857 for the sender address verify, Exim was re-instated it as the original
5858 (before rewriting) address, but remembering that it had rewritten it, so it
5859 wasn't rewriting it again. This bug also had the effect of breaking the
5860 sender address verification caching when the sender address was rewritten.
5862 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5863 This has been changed so that if the ip literal address matches
5864 ignore_target_hosts, the router declines.
5866 7. Added expansion conditions match_domain, match_address, and match_local_
5867 part (NOT match_host).
5869 8. The placeholder for the Received: header didn't have a length field set.
5871 9. Added code to Exim itself and to exim_lock to test for a specific race
5872 condition that could lead to file corruption when using MBX delivery. The
5873 issue is with the lockfile that is created in /tmp. If this file is removed
5874 after a process has opened it but before that process has acquired a lock,
5875 there is the potential for a second process to recreate the file and also
5876 acquire a lock. This could lead to two Exim processes writing to the file
5877 at the same time. The added code performs the same test as UW imapd; it
5878 checks after acquiring the lock that its file descriptor still refers to
5879 the same named file.
5881 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5882 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5885 11. Added the smtp_active_hostname option. If used, this will typically be made
5886 to depend on the incoming interface address. Because $interface_address is
5887 not set up until the daemon has forked a reception process, error responses
5888 that can happen earlier (such as "too many connections") no longer contain
5891 12. If an expansion in a condition on a "warn" statement fails because a lookup
5892 defers, the "warn" statement is abandoned, and the next ACL statement is
5893 processed. Previously this caused the whole ACL to be aborted.
5895 13. Added the iplsearch lookup type.
5897 14. Added ident_timeout as a log selector.
5899 15. Added tls_certificate_verified as a log selector.
5901 16. Added a global option tls_require_ciphers (compare the smtp transport
5902 option of the same name). This controls incoming TLS connections.
5904 17. I finally figured out how to make tls_require_ciphers do a similar thing
5905 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5906 before starting the TLS session.
5908 18. Tabs are now shown as \t in -bP output.
5910 19. If the log selector return_path_on_delivery was set, Exim crashed when
5911 bouncing a message because it had too many Received: header lines.
5913 20. If two routers both had headers_remove settings, and the first one included
5914 a superfluous trailing colon, the final name in the first list and the
5915 first name in the second list were incorrectly joined into one item (with a
5916 colon in the middle).
5922 1. Added -C and -D options to the exinext utility, mainly to make it easier
5923 to include in the automated testing, but these could be helpful when
5924 multiple configurations are in use.
5926 2. The exinext utility was not formatting the output nicely when there was
5927 an alternate port involved in the retry record key, nor when there was a
5928 message id as well (for retries that were specific to a specific message
5929 and a specific host). It was also confused by IPv6 addresses, because of
5930 the additional colons they contain. I have fixed the IPv4 problem, and
5931 patched it up to do a reasonable job for IPv6.
5933 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5934 delivery, the log line now contains "pipelined" if PIPELINING was used.
5936 4. An SMTP transport process used to panic and die if the bind() call to set
5937 an explicit outgoing interface failed. This has been changed; it is now
5938 treated in the same way as a connect() failure.
5940 5. A reference to $sender_host_name in the part of a conditional expansion
5941 that was being skipped was still causing a DNS lookup. This no longer
5944 6. The def: expansion condition was not recognizing references to header lines
5945 that used bh_ and bheader_.
5947 7. Added the _cache feature to named lists.
5949 8. The code for checking quota_filecount in the appendfile transport was
5950 allowing one more file than it should have been.
5952 9. For compatibility with Sendmail, the command line option
5960 and sets the incoming protocol and host name (for trusted callers). The
5961 host name and its colon can be omitted when only the protocol is to be set.
5962 Note the Exim already has two private options, -pd and -ps, that refer to
5963 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5964 "s", but I don't think that's a major issue.
5966 10. A number of refactoring changes to the code, none of which should affect
5969 (a) The number of logging options was getting close to filling up the
5970 32-bit word that was used as a bit map. I have split them into two classes:
5971 those that are passed in the argument to log_write(), and those that are
5972 only ever tested independently outside of that function. These are now in
5973 separate 32-bit words, so there is plenty of room for expansion again.
5974 There is no change in the user interface or the logging behaviour.
5976 (b) When building, for example, log lines, the code previously used a
5977 macro that called string_cat() twice, in order to add two strings. This is
5978 not really sufficiently general. Furthermore, there was one instance where
5979 it was actually wrong because one of the argument was used twice, and in
5980 one call a function was used. (As it happened, calling the function twice
5981 did not affect the overall behaviour.) The macro has been replaced by a
5982 function that can join an arbitrary number of extra strings onto a growing
5985 (c) The code for expansion conditions now uses a table and a binary chop
5986 instead of a serial search (which was left over from when there were very
5987 few conditions). Also, it now recognizes conditions like "pam" even when
5988 the relevant support is not compiled in: a suitably worded error message is
5989 given if an attempt is made to use such a condition.
5991 11. Added ${time_interval:xxxxx}.
5993 12. A bug was causing one of the ddress fields not to be passed back correctly
5994 from remote delivery subprocesses. The field in question was not being
5995 subsequently used, so this caused to problems in practice.
5997 13. Added new log selectors queue_time and deliver_time.
5999 14. Might have fixed a bug in maildirsizefile handling that threw up
6000 "unexpected character" debug warnings, and recalculated the data
6001 unnecessarily. In any case, I expanded the warning message to give more
6004 15. Added the message "Restricted characters in address" to the statements in
6005 the default ACL that block characters like @ and % in local parts.
6007 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6008 Three changes have been made:
6010 (a) There was a serious bug; a negative response to MAIL caused the whole
6011 recipient domain to be cached as invalid, thereby blocking all messages
6012 to all local parts at the same domain, from all senders. This bug has
6013 been fixed. The domain is no longer cached after a negative response to
6014 MAIL if the sender used is not empty.
6016 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6019 (c) A new callout option, "use_sender" has been added for people who want
6020 the modified behaviour.
6026 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6029 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6030 indeed breaks things for older releases.
6032 3. Added additional logging to the case where there is a problem reading data
6033 from a filter that is running in a subprocess using a pipe, in order to
6034 try to track down a specific problem.
6036 4. Testing facility fudge: when running in the test harness and attempting
6037 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6038 getting "No route to host". Convert this to a timeout.
6040 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6043 6. Some OS don't have socklen_t but use size_t instead. This affects the
6044 fifth argument of getsockopt() amongst other things. This is now
6045 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6046 can be set for individual OS. I have set it for SunOS5, OSF1, and
6047 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6048 some earlier ones do not.
6050 7. Change 4.30/15 was not doing the test caselessly.
6052 8. The standard form for an IPv6 address literal was being rejected by address
6053 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6054 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6055 this, as well as the form without the "IPv6" on the front (but only when
6056 address literals are enabled, of course).
6058 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6060 10. Exim crashed if a message with an empty sender address specified by -f
6061 encountered a router with an errors_to setting. This could be provoked only
6062 by a command such as
6066 where an empty string was supplied; "<>" did not hit this bug.
6068 11. Installed PCRE release 4.5.
6070 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6071 remained set. It is now erased.
6073 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6074 times from message ids (which are base 36 rather than the normal 62).
6076 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6077 were being counted as actual protocol errors, and logged if the log
6078 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6079 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6080 and DATA following a set of rejected RCPTs do not count as protocol errors.
6081 In other words, Exim assumes they were pipelined, though this may not
6082 actually be the case. Of course, in all cases the client gets an
6083 appropriate error code.
6085 15. If a lookup fails in an ACL condition, a message about the failure may
6086 be available; it is used if testing the ACL cannot continue, because most
6087 such messages specify what the cause of the deferral is. However, some
6088 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6089 that caused an old message to be retained and used if a later statement
6090 caused a defer, replacing the real cause of the deferral.
6092 16. If an IP address had so many PTR records that the DNS lookup buffer
6093 was not large enough to hold them, Exim could crash while trying to process
6094 the truncated data. It now detects and logs this case.
6096 17. Further to 4.21/58, another change has been made: if (and only if) the
6097 first line of a message (the first header line) ends with CRLF, a bare LF
6098 in a subsequent header line has a space inserted after it, so as not to
6099 terminate the header.
6101 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6102 unnecessarily, used atoi() instead of strtol(), and didn't check the
6103 termination when getting file sizes from file names by regex.
6105 19. Completely re-implemented the support for maildirsize files, in the light
6106 of a number of problems with the previous contributed implementation
6107 (4.30/29). In particular:
6109 . If the quota is zero, the maildirsize file is maintained, but no quota is
6112 . If the maildir directory does not exist, it is created before any attempt
6113 to write a maildirsize file.
6115 . The quota value in the file is just a cache; if the quota is changed in
6116 the transport, the new value overrides.
6118 . A regular expression is available for excluding directories from the
6121 20. The autoreply transport checks the characters in options that define the
6122 message's headers; it allows continued headers, but it was checking with
6123 isspace() after an embedded newline instead of explicitly looking for a
6126 21. If all the "regular" hosts to which an address was routed had passed their
6127 expiry times, and had not reached their retry times, the address was
6128 bounced, even if fallback hosts were defined. Now Exim should go on to try
6131 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6132 equivalent code in the SMTP transport. Some hosts send humungous responses
6133 to HELO/EHLO, more than 1024 it seems.
6135 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6136 gives compiler warnings in some environments. I've now done it "properly",
6139 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6140 (because of problems with the built-in one) was declared to return uschar *
6141 instead of char *, causing compiler failure.
6143 25. Fixed a file descriptor leak when processing alias/forward files.
6145 26. Fixed a minor format string issue in dbfn.c.
6147 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6149 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6150 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6153 29. When a sender address is verified, it is cached, to save repeating the test
6154 when there is more than one recipient in a message. However, when the
6155 verification involves a callout, it is possible for different callout
6156 options to be set for different recipients. It is too complicated to keep
6157 track of this in the cache, so now Exim always runs a verification when a
6158 callout is required, relying on the callout cache for the optimization.
6159 The overhead is duplication of the address routing, but this should not be
6162 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6163 to be verified with callout=postmaster, and the main callout worked but the
6164 postmaster check failed, the verification correctly failed. However, if a
6165 subsequent RCPT command asked for sender verification *without* the
6166 postmaster check, incorrect caching caused this verification also to fail,
6169 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6170 it was not caching the DNS options (qualify_single, search_parents) that
6171 were used when the lookup failed. A subsequent lookup with different
6172 options therefore always gave the same answer, though there were cases
6173 where it should not have. (Example: a "domains = !$mx_any" option on a
6174 dnslookup router: the "domains" option is always processed without any
6175 widening, but the router might have qualify_single set.) Now Exim uses the
6176 cached value only when the same options are set.
6178 32. Added John Jetmore's "exipick" utility to the distribution.
6180 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6181 than a timeout (e.g. a certificate is required, and is not provided), an
6182 Exim server now closes the connection immediately. Previously it waited for
6183 the client to close - but if the client is SSL, it seems that they each
6184 wait for each other, leading to a delay before one of them times out.
6186 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6187 maintained 0.8.x compatibility because I don't think many are using it, and
6188 it is clearly obsolete.
6190 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6193 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6194 client certificate was expired. A simple patch fixes this, though I don't
6195 understand the full logic of why the verify callback is called multiple
6198 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6199 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6200 which causes problems with some clients (such as the Certicom SSL Plus
6201 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6202 disables the coutermeasure allowing Eudora to connect."
6204 38. Exim was not checking that a write() to a log file succeeded. This could
6205 lead to Bad Things if a log got too big, in particular if it hit a file
6206 size limit. Exim now panics and dies if it cannot write to a log file, just
6207 as it does if it cannot open a log file.
6209 39. Modified OS/Makefile-Linux so that it now contains
6211 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6213 The two -D definitions ensure that Exim is compiled with large file
6214 support, which makes it possible to handle log files that are bigger than
6217 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6218 instance) a domain was checked against a named list that involved a lookup,
6219 causing $domain_data to be set, then another domain was checked against the
6220 same list, then the first domain was re-checked, the value of $domain_data
6221 after the final check could be wrong. In particular, if the second check
6222 failed, it could be set empty. This bug probably also applied to
6225 41. The strip_trailing_dot option was not being applied to the address given
6226 with the -f command-line option.
6228 42. The code for reading a message's header from the spool was incrementing
6229 $received_count, but never initializing it. This meant that the value was
6230 incorrect (doubled) while delivering a message in the same process in which
6231 it was received. In the most common configuration of Exim, this never
6232 happens - a fresh exec is done - but it can happen when
6233 deliver_drop_privilege is set.
6235 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6236 it now includes up to 150 characters of the unexpected data in the log
6239 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6240 and building data strings. The size of both of these buffers was 10 000
6241 bytes - far larger than anybody would *ever* want, thought I. Needless to
6242 say, somebody hit the limit. I have increased the maximum line length to
6243 20 000 and the maximum data length of concatenated lines to 100 000. I have
6244 also fixed two bugs, because there was no checking on these buffers. Tsk,
6245 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6246 buffer is too small.
6248 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6249 lsearch lookups. Now it does.
6251 46. When parsing a route_list item in a manualroute router, a fixed-length
6252 buffer was used for the list of hosts. I made this 1024 bytes long,
6253 thinking that nobody would ever have a list of hosts that long. Wrong.
6254 Somebody had a whole pile of complicated expansion conditions, and the
6255 string was silently truncated, leading to an expansion error. It turns out
6256 that it is easier to change to an unlimited length (owing to other changes
6257 that have happened since this code was originally written) than to build
6258 structure for giving a limitation error. The length of the item that
6259 expands into the list of hosts is now unlimited.
6261 47. The lsearch lookup could not handle data where the length of text line was
6262 more than 4095 characters. Such lines were truncated, leading to shortened
6263 data being returned. It should now handle lines of any length.
6265 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6266 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6269 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6270 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6271 no longer happens in comment lines. A list of replacements is now placed
6272 at the head of all of the source files, except those whose only change is
6273 to replace PERL_COMMAND in the very first #! line.
6275 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6276 messages on the queue, with a bottom-up merge sort, using code contributed
6277 by Michael Haardt. This should make operations like -bp somewhat faster on
6278 large queues. It won't affect queue runners, except when queue_run_in_order
6281 51. Installed eximstats 1.31 in the distribution.
6283 52. Added support for SRV lookups to the dnslookup router.
6285 53. If an ACL referred to $message_body or $message_body_end, the value was not
6286 reset for any messages that followed in the same SMTP session.
6288 54. The store-handling optimization for building very long strings was not
6289 differentiating between the different store pools. I don't think this
6290 actually made any difference in practice, but I've tidied it.
6292 55. While running the routers to verify a sender address, $sender_address
6293 was still set to the sender address. This is wrong, because when routing to
6294 send a bounce to the sender, it would be empty. Therefore, I have changed
6295 it so that, while verifying a sender address, $sender_address is set to <>.
6296 (There is no change to what happens when verifying a recipient address.)
6298 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6299 target A or AAAA records (if not already returned) without resetting the
6300 qualify_single or search_parents options of the DNS resolver. These are
6301 inappropriate in this case because the targets of MX and SRV records must
6302 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6303 target that, when qualified, matched something in the local domain. These
6304 two options are now turned off when doing these lookups.
6306 57. It seems that at least some releases of Reiserfs (which does not have the
6307 concept of a fixed number of inodes) returns zero and not -1 for the
6308 number of available inodes. This interacted badly with check_spool_inodes,
6309 which assumed that -1 was the "no such thing" setting. What I have done is
6310 to check that the total number of inodes is greater than zero before doing
6311 the test of how many are available.
6313 58. When a "warn" ACL statement has a log_message modifier, the message is
6314 remembered, and not repeated. This is to avoid a lot of repetition when a
6315 message has many recipients that cause the same warning to be written.
6316 However, Exim was preserving the list of already written lines for an
6317 entire SMTP session, which doesn't seem right. The memory is now reset if a
6318 new message is started.
6320 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6321 debugging output unless log_rewrite was also set.
6323 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6324 of (int)(handle) when we know that handle contains (void *)(-1).
6326 61. The Exim daemon panic-logs an error return when it closes the incoming
6327 connection. However "connection reset by peer" seems to be common, and
6328 isn't really an error worthy of noting specially, so that particular error
6331 62. When Exim is trying to find all the local interfaces, it used to panic and
6332 die if the ioctl to get the interface flags failed. However, it seems that
6333 on at least one OS (Solaris 9) it is possible to have an interface that is
6334 included in the list of interfaces, but for which you get a failure error
6335 for this call. This happens when the interface is not "plumbed" into a
6336 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6337 failure of the "get flags" call assumes that the interface is down.
6339 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6340 makes life easier for people who are doing arithmetic on fields extracted
6341 from dates, where you often get leading zeros that should not be
6342 interpreted as octal.
6344 64. Added qualify_domain to the redirect router, to override the global
6347 65. If a pathologically long header line contained very many addresses (the
6348 report of this problem mentioned 10 000) and each of them was rewritten,
6349 Exim could use up a very large amount of memory. (It kept on making new
6350 copies of the header line as it rewrote, and never released the old ones.)
6351 At the expense of a bit more processing, the header rewriting function has
6352 been changed so that it no longer eats memory in this way.
6354 66. The generation of the Received: header has been moved from the time that a
6355 message starts to be received, to the time that it finishes. The timestamp
6356 in the Received: header should now be very close to that of the <= log
6357 line. There are two side-effects of this change:
6359 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6360 logged header lines no longer include the local Received: line, because
6361 it has not yet been created. The same applies to a copy of the message
6362 that is returned to a non-SMTP sender when a message is rejected.
6364 (b) When a filter file is tested using -bf, no additional Received: header
6365 is added to the test message. After some thought, I decided that this
6368 This change does not affect the value of $received_for. It is still set
6369 after address rewriting, but before local_scan() is called.
6371 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6373 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6374 gave an unhelpful panic error message, and a defer error. I have managed to
6375 change this behaviour so that it now rejects any supplied certificate,
6376 which seems right, as the list of acceptable certificates is empty.
6378 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6379 gave an unhelpful defer error. I have not managed to make this reject any
6380 supplied certificates, but the error message it gives is "no certificate
6381 supplied", which is not helpful.
6383 70. exigrep's output now also includes lines that are not associated with any
6384 message, but which match the given pattern. Implemented by a patch from
6385 Martin Sluka, which also tidied up the Perl a bit.
6387 71. Recipient callout verification, like sender verification, was using <> in
6388 the MAIL FROM command. This isn't really the right thing, since the actual
6389 sender may affect whether the remote host accepts the recipient or not. I
6390 have changed it to use the actual sender in the callout; this means that
6391 the cache record is now keyed on a recipient/sender pair, not just the
6392 recipient address. There doesn't seem to be a real danger of callout loops,
6393 since a callout by the remote host to check the sender would use <>.
6394 [SEE ABOVE: changed after hitting problems.]
6396 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6397 temporary errors. However, in the case of such a code being given after
6398 the end of a data transmission (i.e. after ".") Exim was failing to write
6399 a retry record for the message. (Yes, there was some broken host that was
6400 actually sending 8xx at this point.)
6402 73. An unknown lookup type in a host list could cause Exim to panic-die when
6403 the list was checked. (An example that provoked this was putting <; in the
6404 middle of a list instead of at the start.) If this happened during a DATA
6405 ACL check, a -D file could be left lying around. This kind of configuration
6406 error no longer causes Exim to die; instead it causes a defer error. The
6407 incident is still logged to the main and panic logs.
6409 74. Buglet left over from Exim 3 conversion. The message "too many messages
6410 in one connection" was written to the rejectlog but not the mainlog, except
6411 when address rewriting (yes!) was being logged.
6413 75. Added write_rejectlog option.
6415 76. When a system filter was run not as root (that is, when system_filter_user
6416 was set), the values of the $n variables were not being returned to the
6417 main process; thus, they were not subsequently available in the $sn
6420 77. Added +return_path_on_delivery log selector.
6422 78. A connection timeout was being treated differently from recipients deferred
6423 when testing hosts_max_try with a message that was older than the host's
6424 retry timeout. (The host should not be counted, thus allowing all hosts to
6425 be tried at least once before bouncing.) This may have been the cause of an
6426 occasionally reported bug whereby a message would remain on the queue
6427 longer than the retry timeout, but would be bounced if a delivery was
6428 forced. I say "may" because I never totally pinned down the problem;
6429 setting up timeout/retry tests is difficult. See also the next item.
6431 79. The ultimate address timeout was not being applied to errors that involved
6432 a combination of host plus message (for example, a timeout on a MAIL
6433 command). When an address resolved to a number of possible hosts, and they
6434 were not all tried for each delivery (e.g. because of hosts_max_try), a
6435 message could remain on the queue longer than the retry timeout.
6437 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6440 81. Fixed an obscure SMTP outgoing bug which required at least the following
6441 conditions: (a) there was another message waiting for the same server;
6442 (b) the server returned 5xx to all RCPT commands in the first message so
6443 that the message was not completed; (c) the server dropped the connection
6444 or gave a negative response to the RSET that Exim sends to abort the
6445 transaction. The observed case was a dropped connection after DATA that had
6446 been sent in pipelining mode. That is, the server had advertised PIPELINING
6447 but was not implementing it correctly. The effect of the bug was incorrect
6448 behaviour, such as trying another host, and this could lead to a crash.
6454 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6455 and daemon.c were passed as pointers to ints; they should have been
6456 pointers to socklen_t variables (which are typically unsigned ints).
6458 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6461 3. Fixed a really odd bug that affected only the testing scheme; patching a
6462 certain fixed string in the binary changed the value of another string that
6463 happened to be identical to the end of the original first string.
6465 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6466 name", it returns that address as the IP address. On some operating
6467 systems (e.g. Solaris), it also passes back the IP address string as the
6468 "host name". However, on others (e.g. Linux), it passes back an empty
6469 string. Exim wasn't checking for this, and was changing the host name to an
6470 empty string, assuming it had been canonicalized.
6472 5. Although rare, it is permitted to have more than one PTR record for a given
6473 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6474 all the names associated with an address, because they do in Solaris.
6475 However, it seems that they do not in Linux for data that comes from the
6476 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6477 I found this out when I moved to a new Linux workstation and tried to run
6478 the Exim test suite.
6480 To get round this problem I have changed the code so that it now does its
6481 own call to the DNS to look up PTR records when searching for a host name.
6482 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6483 addresses that are only in /etc/hosts are still found.
6485 This behaviour is, however, controlled by an option called host_lookup_
6486 order, which defaults to "bydns:byaddr". If people want to use the other
6487 order, or indeed, just use one or the other means of lookup, they can
6488 specify it in this variable.
6490 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6491 some operating systems, this comes back from gethostbyaddr() as an empty
6492 string, and this is what Exim used to test for. However, it seems that in
6493 other systems, "." is yielded. Exim now tests for this case too.
6495 7. The values of check_spool_space and check_log_space are now held internally
6496 as a number of kilobytes instead of an absolute number of bytes. If a
6497 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6498 kilobyte. This means that much larger values can be stored.
6500 8. Exim monitor: an attempt to get the action menu when not actually pointing
6501 at a message produces an empty menu entitled "No message selected". This
6502 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6503 no entries in it ("Shell widget menu has zero width and/or height"). So I
6504 have added a single, blank menu entry in this case.
6506 9. Added ${quote_local_part.
6508 10. MIME decoding is now applied to the contents of Subject: header lines when
6511 11. Now that a reference to $sender_host_address automatically causes a reverse
6512 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6513 host lookup before query-style lookups in lists that might use this
6514 variable. This has therefore been abolished, and the "net-" prefix is no
6515 longer necessary for query-style lookups.
6517 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6518 have been a typo for LFLAGS, so it has been changed.
6520 13. The install script calls Exim with "-C /dev/null" in order to find the
6521 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6522 to be output. However, since Exim outputs its version number before the
6523 error, it didn't break the script. It just looked ugly. I fixed this by
6524 always allowing "-C /dev/null" if the caller is root.
6526 14. Ignore overlarge ACL variable number when reading spool file - insurance
6527 against a later release with more variables having written the file.
6529 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6530 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6531 this, as well as the form without the "IPv6" on the front.
6533 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6534 OS/Makefile-Darwin file.
6536 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6537 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6539 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6540 variable. However, some OS use ints for inodes. I've added cast to long int
6541 to get rid of the compiler warning.
6543 19. I had forgotten to lock out "/../" in configuration file names when
6544 ALT_CONFIG_PREFIX was set.
6546 20. Routers used for verification do not need to specify transports. However,
6547 if such a router generated a host list, and callout was configured, Exim
6548 crashed, because it could not find a port number from the (non-existent)
6549 transport. It now assumes port 25 in this circumstance.
6551 21. Added the -t option to exigrep.
6553 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6554 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6555 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6556 them is set, LOOKUP_LSEARCH is forced.
6558 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6560 24. Added sender and host information to the "rejected by local_scan()" log
6561 line; previously there was no indication of these.
6563 25. Added .include_if_exists.
6565 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6566 Linux. It turns out that not all file systems support this. Apparently some
6567 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6568 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6569 not supported on the file descriptor, is now ignored when Exim is trying to
6570 sync a directory. This applies only to Linux.
6572 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6574 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6575 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6578 29. Added support for maildirsize files from supplied patch (modified a bit).
6580 30. The use of :fail: followed by an empty string could lead Exim to respond to
6581 sender verification failures with (e.g.):
6583 550 Verification failed for <xxx>
6584 550 Sender verify failed
6586 where the first response line was missing the '-' that indicates it is not
6587 the final line of the response.
6589 31. The loop for finding the name of the user that called Exim had a hardwired
6590 limit of 10; it now uses the value of finduser_retries, which is used for
6591 all other user lookups.
6593 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6596 33. Exim was neglecting to zero errno before one call of strtol() when
6597 expanding a string and expecting an integer value. On some systems this
6598 resulted in spurious "integer overflow" errors. Also, it was casting the
6599 result into an int without checking.
6601 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6602 did not work. The code looks as if it has *never* worked, though it appears
6603 to have been documented since at least release 1.62. I have made it work.
6605 35. The "timeout_DNS" error in retry rules, also documented since at least
6606 1.62, also never worked. As it isn't clear exactly what this means, and
6607 clearly it isn't a major issue, I have abolished the feature by treating it
6608 as "timeout", and writing a warning to the main and panic logs.
6610 36. The display of retry rules for -brt wasn't always showing the error code
6613 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6614 timeout_connect_A, timeout_connect_MX.
6616 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6617 to the empty sender.
6619 39. The daemon was not analysing the content of -oX till after it had closed
6620 stderr and disconnected from the controlling terminal. This meant that any
6621 syntax errors were only noted on the panic log, and the return code from
6622 the command was 0. By re-arranging the code a little, I've made the
6623 decoding happen first, so such errors now appear on stderr, and the return
6624 code is 1. However, the actual setting up of the sockets still happens in
6625 the disconnected process, so errors there are still only recorded on the
6628 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6629 connections (as happens on some IP stacks) was logged at start up time as
6630 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6631 it from "IPv6 and IPv4", which means that two separate sockets are being
6634 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6635 says whether AF_INET or AF_INET6 was passed as an argument.
6637 42. Exiwhat output was messed up when time zones were included in log
6640 43. Exiwhat now gives more information about the daemon's listening ports,
6641 and whether -tls-on-connect was used.
6643 44. The "port" option of the smtp transport is now expanded.
6645 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6646 silently ignored. Now an error message is written to the main and panic
6649 46. There's a new ACL modifier called "logwrite" which writes to a log file
6650 as soon as it is encountered.
6652 47. Added $local_user_uid and $local_user_gid at routing time.
6654 48. Exim crashed when trying to verify a sender address that was being
6657 49. Exim was recognizing only a space character after ".include". It now also
6658 recognizes a tab character.
6660 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6661 extracting the relevant information from the specification. The man page no
6662 longer contains scrambled data for the -d option, and I've added a section
6663 at the front about calling Exim under different names.
6665 51. Added "extra_headers" argument to the "mail" command in filter files.
6667 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6670 53. Installed eximstats 1.29.
6672 54. Added transport_filter_timeout as a generic transport option.
6674 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6675 Cc: header lines. This was required by RFC 822, but it not required by RFC
6678 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6679 incoming messages that did not have them. Now it does so only if the
6680 message originates locally, that is, if there is no associated remote host
6681 address. When Resent- header lines are present, this applies to the Resent-
6682 lines rather than the non-Resent- lines.
6684 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6685 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6687 58. Messages for configuration errors now include the name of the main
6688 configuration file - useful now that there may be more than one file in a
6689 list (.included file names were always shown).
6691 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6692 for those rare installations that do not start the daemon as root or run it
6693 setuid root. I've cut out the call to initgroups() if the daemon is not
6696 60. The Exim user and group can now be bound into the binary as text strings
6697 that are looked up at the start of Exim's processing.
6699 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6701 62. Added $mailstore_basename variable.
6703 63. Installed patch to sieve.c from Michael Haardt.
6705 64. When Exim failed to open the panic log after failing to open the main log,
6706 the original message it was trying to log was written to stderr and debug
6707 output, but if they were not available (the usual case in production), it
6708 was lost. Now it is written to syslog before the two lines that record the
6709 failures to open the logs.
6711 65. Users' Exim filters run in subprocesses under the user's uid. It is
6712 possible for a "deliver" command or an alias in a "personal" command to
6713 provoke an address rewrite. If logging of address rewriting is configured,
6714 this fails because the process is not running as root or exim. There may be
6715 a better way of dealing with this, but for the moment (because 4.30 needs
6716 to be released), I have disabled address rewrite logging when running a
6717 filter in a non-root, non-exim process.
6723 1. The buildconfig auxiliary program wasn't quoting the value set for
6724 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6725 not defined. This bug was masked in 4.22 by the effect that was fixed in
6728 2. Some messages that were rejected after a message id was allocated were
6729 shown as "incomplete" by exigrep. It no longer does this for messages that
6730 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6732 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6733 have allow_domain_literals set, the ID did not get logged in the <= line.
6734 Domain literals are now always recognized in Message-ID: header lines.
6736 4. The first argument for a ${extract expansion item is the key name or field
6737 number. Leading and trailing spaces in this item were not being ignored,
6738 causing some misleading effects.
6740 5. When deliver_drop_privilege was set, single queue runner processes started
6741 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6742 same command in the process it spins off) were not dropping privilege.
6744 6. When the daemon running as "exim" started a queue runner, it always
6745 re-executed Exim in the spun-off process. This is a waste of effort when
6746 deliver_drop_privilege is set. The new process now just calls the
6747 queue-runner function directly.
6753 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6756 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6757 ignored. Though the use of -oP was forcing the writing of a pid file, it
6758 was always written to the default place.
6760 3. If the message "no IP address found for host xxxx" is generated during
6761 incoming verification, it is now followed by identification of the incoming
6762 connection (so you can more easily find what provoked it).
6764 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6766 5. Added some features to "harden" Exim a bit more against certain attacks:
6768 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6769 be put in Local/Makefile. This is like the never_users runtime option,
6770 but it cannot be overridden. The default setting is "root".
6772 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6773 prefix string with which any file named in a -C command line option
6776 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6777 is retained for -C and -D only if the caller of Exim is root. Without
6778 it, the exim user may also use -C and -D and retain privilege.
6780 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6781 command line option is disabled.
6783 6. Macro names set by the -D option must start with an upper case letter, just
6784 like macro names defined in the configuration file.
6786 7. Added "dereference=" facility to LDAP.
6788 8. Two instances of the typo "uknown" in the source files are fixed.
6790 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6791 the Configure-Makefile script screwed up while processing it.
6793 10. Incorporated PCRE 4.4.
6795 11. The SMTP synchronization check was not operating right at the start of an
6796 SMTP session. For example, it could not catch a HELO sent before the client
6797 waited for the greeting. There is now a check for outstanding input at the
6798 point when the greeting is written. Because of the duplex, asynchronous
6799 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6800 way, but not yet received, when the check is performed.
6802 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6803 on TCP/IP sockets, because this apparently causes some broken clients to
6806 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6807 unchanged) from the Cygwin maintainer.
6809 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6810 was supported instead of testing for mbx. Effectively a typo.
6812 15. The spa authenticator server code was not checking that the input it
6813 received was valid base64.
6815 16. The debug output line for the "set" modifier in ACLs was not showing the
6816 name of the variable that was being set.
6818 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6820 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6821 lookup on its own. Something else was needed to trigger the lookup. For
6822 example, a match in host_lookup or the need for a host name in a host list.
6823 Now, if $sender_host_name is referenced and the host name has not yet been
6824 looked up, a lookup is performed. If the lookup fails, the variable remains
6825 empty, and $host_lookup_failed is set to "1".
6827 19. Added "eqi" as a case-independent comparison operator.
6829 20. The saslauthd authentication condition could segfault if neither service
6830 nor realm was specified.
6832 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6833 error message that was logged was misleading, and incoming SMTP
6834 connections were dropped. The message is now more accurate, and temporary
6835 errors are given to SMTP connections.
6837 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6838 (except RSET) with a 421 error, until QUIT is received. However, it was
6839 failing to send a response to QUIT.
6841 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6842 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6843 ACL is now run after the helo_try_verify_hosts code.
6845 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6846 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6847 case-independent, so other case variants are also recognized). Apparently
6848 some systems use these upper case variants.
6850 25. If more than two messages were waiting for the same host, and a transport
6851 filter was specified for the transport, Exim sent two messages over the
6852 same TCP/IP connection, and then failed with "socket operation on non-
6853 socket" when it tried to send the third.
6855 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6857 27. The extern definition of crypt16() in expand.c was not being excluded when
6858 the OS had its own crypt16() function.
6860 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6861 as a preferred synonym for return_size_limit, both as an option and as an
6864 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6866 30. Changed the default configuration ACL to relax the local part checking rule
6867 for addresses that are not in any local domains. For these addresses,
6868 slashes and pipe symbols are allowed within local parts, but the sequence
6869 /../ is explicitly forbidden.
6871 31. SPA server authentication was not clearing the challenge buffer before
6874 32. log_message in a "warn" ACL statement was writing to the reject log as
6875 well as to the main log, which contradicts the documentation and doesn't
6876 seem right (because no rejection is happening). So I have stopped it.
6878 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6879 However, I am unable to do any testing of this.
6881 34. Fixed an infelicity in the appendfile transport. When checking directories
6882 for a mailbox, to see if any needed to be created, it was accidentally
6883 using path names with one or more superfluous leading slashes; tracing
6884 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6886 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6887 contents are added to the log line that is written for every discarded
6888 recipient. (Previously a log_message setting was ignored.)
6890 36. The ${quote: operator now quotes the string if it is empty.
6892 37. The install script runs exim in order to find its version number. If for
6893 some reason other than non-existence or emptiness, which it checks, it
6894 could not run './exim', it was installing it with an empty version number,
6895 i.e. as "exim-". This error state is now caught, and the installation is
6898 38. An argument was missing from the function that creates an error message
6899 when Exim fails to connect to the socket for saslauthd authentication.
6900 This could cause Exim to crash, or give a corrupted message.
6902 39. Added isip, isip4, and isip6 to ${if conditions.
6904 40. The ACL variables $acl_xx are now saved with the message, and can be
6905 accessed later in routers, transports, and filters.
6907 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6908 strings in the file are not string-expanded.
6910 42. If a MAIL command specified a SIZE value that was too large to fit into an
6911 int variable, the check against message_size_limit failed. Such values are
6912 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6913 day this will have to be increased, but I don't think I want to be around
6914 when emails are that large.
6921 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6922 iconv() is not standard in FreeBSD.
6924 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6925 IPv6 enabled. The observed symptom was a segmentation fault on return from
6926 the function os_common_find_running_interfaces() in src/os.c.
6928 3. In the check_special_case() function in daemon.c I had used "errno" as an
6929 argument name, which causes warnings on some systems. This was basically a
6930 typo, since it was named "eno" in the comments!
6932 4. The code that waits for the clock to tick (at a resolution of some fraction
6933 of a second) so as to ensure message-id uniqueness was always waiting for
6934 at least one whole tick, when it could have waited for less. [This is
6935 almost certainly not relevant at current processor speeds, where it is
6936 unlikely to ever wait at all. But we try to future-proof.]
6938 5. The function that sleeps for a time interval that includes fractions of a
6939 second contained a race. It did not block SIGALRM between setting the
6940 timer, and suspending (a couple of lines later). If the interval was short
6941 and the sigsuspend() was delayed until after it had expired, the suspension
6942 never ended. On busy systems this could lead to processes getting stuck for
6945 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6946 process, before it forks any delivery processes. The open lookup caching
6947 mechanism meant that the open file or database connection was passed into
6948 the delivery process. The problem was that delivery processes always tidy
6949 up cached lookup data. This could cause a problem for the next delivery
6950 process started by the queue runner, because the external queue runner
6951 process does not know about the closure. So the next delivery process
6952 still has data in the lookup cache. In the case of a file lookup, there was
6953 no problem because closing a file descriptor in a subprocess doesn't affect
6954 the parent. However, if the lookup was caching a connection to a database,
6955 the connection was closed, and the second delivery process was likely to
6956 see errors such as "PGSQL: query failed: server closed the connection
6957 unexpectedly". The problem has been fixed by closing all cached lookups
6958 in a queue runner before running a delivery process.
6960 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6961 seem to have the "const" qualifier which it has on other OS. I've
6964 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6965 *of the same type* (client or server) with the same public name that an
6966 error should be diagnosed.
6968 9. When Exim looked up a host name for an IP address, but failed to find the
6969 original IP address when looking up the host name (a safety check), it
6970 output the message "<ip address> does not match any IP for NULL", which was
6971 confusing, to say the least. The bug was that the host name should have
6972 appeared instead of "NULL".
6974 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6975 user that is built into the binary, and the -C or -D options is used, root
6976 privilege is dropped before the configuration file is read. In addition,
6977 logging is switched to stderr instead of the normal log files. If the
6978 configuration then re-defines the Exim user, the unprivileged environment
6979 is probably not what is expected, so Exim logs a panic warning message (but
6982 However, if deliver_drop_privilege is set, the unprivileged state may well
6983 be exactly what is intended, so the warning has been cut out in that case,
6984 and Exim is allowed to try to write to its normal log files.
6990 1. smtp_return_error_details was not giving details for temporary sender
6991 or receiver verification errors.
6993 2. Diagnose a configuration error if two authenticators have the same public
6996 3. Exim used not to create the message log file for a message until the first
6997 delivery attempt. This could be confusing when incoming messages were held
6998 for policy or load reasons. The message log file is now created at the time
6999 the message is received, and an initial "Received" line is written to it.
7001 4. The automatically generated man page for command line options had a minor
7002 bug that caused no ill effects; however, a more serious problem was that
7003 the procedure for building the man page automatically didn't always
7004 operate. Consequently, release 4.20 contains an out-of-date version. This
7005 shouldn't happen again.
7007 5. When building Exim with embedded Perl support, the script that builds the
7008 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7009 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7011 6. The freeze_tell option was not being used for messages that were frozen on
7012 arrival, either by an ACL or by local_scan().
7014 7. Added the smtp_incomplete_transaction log selector.
7016 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7017 was accepting AUTH without a new EHLO.
7019 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7020 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7023 10. Logging of TCP/IP connections (when configured) now happens in the main
7024 daemon process instead of the child process, so that the TCP/IP connection
7025 count is more accurate (but it can never be perfect).
7027 11. The use of "drop" in a nested ACL was not being handled correctly in the
7028 outer ACL. Now, if condition failure induced by the nested "drop" causes
7029 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7030 or "require"), the connection is dropped.
7032 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7033 that yield "discard" can now be used with an "accept" or a "discard" verb,
7034 but an error is generated for any others (because I can't see a useful way
7035 to define what should happen).
7037 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7038 are now processed in the same way as lines in the Exim configuration file.
7039 In particular, continuation lines are supported.
7041 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7043 15. Added -ti meaning -t -i.
7045 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7046 domains, and warn by logging if others are found.
7048 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7049 returned from GIFCONF when Exim is trying to find the list of interfaces on
7050 a host. The code in os.c has been modified to copy each ifreq to an aligned
7051 structure in all cases.
7053 Also, in some cases, the returned ifreq's were being copied to a 'struct
7054 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7055 means the last couple of bytes of an IPv6 address could be chopped if the
7056 ifreq contained only a normal sockaddr (14 bytes storage).
7058 18. Named domain lists were not supported in the hosts_treat_as_local option.
7059 An entry such as +xxxx was not recognized, and was treated as a literal
7062 19. Ensure that header lines added by a DATA ACL are included in the reject log
7063 if the ACL subsequently rejects the message.
7065 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7066 MD5 (which is deprecated).
7068 21. When testing a filter file using -bf, Exim was writing a message when it
7069 took the sender from a "From " line in the message, but it was not doing so
7070 when it took $return_path from a Return-Path: header line. It now does.
7072 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7073 with a valid header line field name (a series of printing characters
7074 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7076 23. Changed "disc" in the source to "disk" to conform to the documentation and
7077 the book and for uniformity.
7079 24. Ignore Sendmail's -Ooption=value command line item.
7081 25. When execve() failed while trying to run a command in a pipe transport,
7082 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7083 could be confused with a return value of 69 from the command itself. This
7084 has been changed to 127, the value the shell returns if it is asked to run
7085 a non-existent command. The wording for the related log line suggests a
7086 non-existent command as the problem.
7088 26. If received_header_text expands to an empty string, do not add a Received:
7089 header line to the message. (Well, it adds a token one on the spool, but
7090 marks it "old" so that it doesn't get used or transmitted.)
7092 27. Installed eximstats 1.28 (addition of -nt option).
7094 28. There was no check for failure on the call to getsockname() in the daemon
7095 code. This can fail if there is a shortage of resources on the system, with
7096 ENOMEM, for example. A temporary error is now given on failure.
7098 29. Contrary to the C standard, it seems that in some environments, the
7099 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7100 program. Exim now does this explicitly; it affects the formatting of
7101 timestamps using strftime().
7103 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7104 complaints. I've now initialized all the variables, to avoid this.
7106 32. Header lines added by a system filter were not being "seen" during
7107 transport-time rewrites.
7109 33. The info_callback() function passed to OpenSSL is set up with type void
7110 (*)(SSL *, int, int), as described somewhere. However, when calling the
7111 function (actually a macro) that sets it up, the type void(*)() is
7112 expected. I've put in a cast to prevent warnings from picky compilers.
7114 34. If a DNS black list lookup found a CNAME record, but there were no A
7115 records associated with the domain it pointed at, Exim crashed.
7117 35. If a DNS black list lookup returned more than one A record, Exim ignored
7118 all but the first. It now scans all returned addresses if a particular IP
7119 value is being sought. In this situation, the contents of the
7120 $dnslist_value variable are a list of all the addresses, separated by a
7123 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7124 to accept a host name and all its aliases if the forward lookup for any of
7125 them yielded the IP address of the incoming connection. Now it accepts only
7126 those names whose forward lookup yields the correct IP address. Any other
7127 names are discarded. This closes a loophole whereby a rogue DNS
7128 administrator could create reverse DNS records to break through a
7129 wildcarded host restriction in an ACL.
7131 37. If a user filter or a system filter that ran in a subprocess used any of
7132 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7133 the wrong values were passed to the pipe command ($thisaddress had the
7134 value of $0, $0 had the value of $1, etc). This bug was introduced by
7135 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7137 38. Improved the line breaking for long SMTP error messages from ACLs.
7138 Previously, if there was no break point between 40 and 75 characters, Exim
7139 left the rest of the message alone. Two changes have been made: (a) I've
7140 reduced the minimum length to 35 characters; (b) if it can't find a break
7141 point between 35 and 75 characters, it looks ahead and uses the first one
7142 that it finds. This may give the occasional overlong line, but at least the
7143 remaining text gets split now.
7145 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7146 file descriptors might be low, and that setting 1000 would always raise it.
7147 It turns out that in some environments, the limit is already over 1000 and
7148 that lowering it causes trouble. So now Exim takes care not to decrease it.
7150 40. When delivering a message, the value of $return_path is set to $sender_
7151 address at the start of routing (routers may change the value). By an
7152 oversight, this default was not being set up when an address was tested by
7153 -bt or -bv, which affected the outcome if any router or filter referred to
7156 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7157 log only when "message" or "log_message" are set. However, if one of the
7158 conditions was an address verification, or a call to a nested ACL, the
7159 messages generated by the underlying test were being passed through. This
7160 no longer happens. The underlying message is available in $acl_verify_
7161 message for both "message" and "log_message" expansions, so it can be
7162 passed through if needed.
7164 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7165 new expansion $bh_ to give the encoded byte string without charset
7166 translation. Translation happens only if iconv() is available; HAVE_ICONV
7167 indicates this at build time. HEADERS_CHARSET gives the charset to
7168 translate to; headers_charset can change it in the configuration, and
7169 "headers charset" can change it in an individual filter file.
7171 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7172 that creates RFC 2047 encoded "words" labels them as that charset instead
7173 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7174 expansion operator; (ii) when Exim creates a From: line for a local
7175 message; (iii) when a header line is rewritten to include a "phrase" part.
7177 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7178 buggy, causing it to skip the first lines of messages whose message ID
7179 ended in 'D'. This would not have bitten before Exim release 4.14, because
7180 message IDs were unlikely to end in 'D' before then. The effect was to have
7181 incorrect size information for certain domains.
7183 45. #include "config.h" was missing at the start of the crypt16.c module. This
7184 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7187 46. If there was a timeout during a "random" callout check, Exim treated it as
7188 a failure of the random address, and carried on sending RSET and the real
7189 address. If the delay was just some slowness somewhere, the response to the
7190 original RCPT would be taken as a response to RSET and so on, causing
7191 mayhem of various kinds.
7193 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7194 when I implemented it. It didn't allow for the fact that some option values
7195 may legitimately be negative (e.g. size_addition), and it didn't even do
7196 the right test for positive values.
7198 48. Domain names in DNS records are case-independent. Exim always looks them up
7199 in lower case. Some resolvers return domain names in exactly the case they
7200 appear in the zone file, that is, they may contain uppercase letters. Not
7201 all resolvers do this - some return always lower case. Exim was treating a
7202 change of case by a resolver as a change of domain, similar to a widening
7203 of a domain abbreviation. This triggered its re-routing code and so it was
7204 trying to route what was effectively the same domain again. This normally
7205 caused routing to fail (because the router wouldn't handle the domain
7206 twice). Now Exim checks for this case specially, and just changes the
7207 casing of the domain that it ultimately uses when it transmits the message
7210 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7213 50. If a filter generated a file delivery with a non-absolute name (possible if
7214 no home directory exists for the router), the forbid_file option was not
7217 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7218 the existing equality matching.
7220 52. Exim was using ints instead of ino_t variables in some places where it was
7221 dealing with inode numbers.
7223 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7224 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7225 called TMPDIR, and if it finds it is different, it changes its value.
7227 54. The smtp_printf() function is now made available to local_scan() so
7228 additional output lines can be written before returning. There is also an
7229 smtp_fflush() function to enable the detection of a dropped connection.
7230 The variables smtp_input and smtp_batched_input are exported to
7233 55. Changed the default runtime configuration: the message "Unknown user"
7234 has been removed from the ACL, and instead placed on the localuser router,
7235 using the cannot_route_message feature. This means that any verification
7236 failures that generate their own messages won't get overridden. Similarly,
7237 the "Unrouteable address" message that was in the ACL for unverifiable
7238 relay addresses has also been removed.
7240 56. Added hosts_avoid_esmtp to the smtp transport.
7242 57. The exicyclog script was not checking for the esoteric option
7243 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7244 will work only if exicyclog is run under the appropriate euid.
7246 58. Following a discussion on the list, the rules by which Exim recognises line
7247 endings on incoming messages have been changed. The -dropcr and drop_cr
7248 options are now no-ops, retained only for backwards compatibility. The
7249 following line terminators are recognized: LF CRLF CR. However, special
7250 processing applies to CR:
7252 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7253 nor a local message in the state where . is a terminator.
7255 (ii) If a bare CR is encountered in a header line, an extra space is added
7256 after the line terminator so as not to end the header. The reasoning
7257 behind this is that bare CRs in header lines are most likely either
7258 to be mistakes, or people trying to play silly games.
7260 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7261 was being incorrectly given as 18 bytes larger than it should have been.
7262 This is a VOB (very old bug).
7264 60. This may never have affected anything current, but just in case it has:
7265 When the local host is found other than at the start of a list of hosts,
7266 the local host, those with the same MX, and any that follow, are discarded.
7267 When the list in question was part of a longer list of hosts, the following
7268 hosts (not currently being processed) were also being discarded. This no
7269 longer happens. I'm not sure if this situation could ever has previously
7272 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7275 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7276 header. This is something that is recommended in a new Internet Draft, and
7277 is something that is documented as being done by Sendmail. There are two
7278 possible values. For messages generated by the autoreply transport, Exim
7281 Auto-Submitted: auto-replied
7283 whereas for all other generated messages (e.g. bounces) it adds
7285 Auto-Submitted: auto-generated
7287 63. The "personal" condition in filters now includes a test for the
7288 Auto-Submitted: header. If it contains the string "auto-" the message it
7289 not considered personal.
7291 64. Added rcpt_include_affixes as a generic transport option.
7293 65. Added queue_only_override (default true).
7295 66. Added the syslog_duplication option.
7297 67. If what should have been the first header line of a message consisted of
7298 a space followed by a colon, Exim was mis-interpreting it as a header line.
7299 It isn't of course - it is syntactically invalid and should therefore be
7300 treated as the start of the message body. The misbehaviour could have
7301 caused a number of strange effects, including loss of data in subsequent
7302 header lines, and spool format errors.
7304 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7305 client host had authenticated. This control can now be exercised by an ACL
7306 for more flexibility.
7308 69. By default, callouts do not happen when testing with -bh. There is now a
7309 variant, -bhc, which does actually run the callout code, including
7310 consulting and updating the callout cache.
7312 70. Added support for saslauthd authentication, courtesy of Alexander
7315 71. If statvfs() failed on the spool or log directories while checking their
7316 size for availability, Exim confusingly gave the error "space shortage".
7317 Furthermore, in debugging mode it crashed with a floating point exception.
7318 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7319 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7320 serious problem, Exim now writes to the main and panic logs when this
7321 happens, with details of the failure. It then refuses to accept the
7322 incoming message, giving the message "spool directory problem" or "log
7323 directory problem" with a 421 code for SMTP messages.
7325 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7326 0, 1, and 2 exist, because some OS complain for execs without them (see
7327 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7328 descriptors. However, the code omitted to check that the open succeeded,
7329 causing mysterious errors if for some reason the permissions on /dev/null
7330 got screwed. Now Exim writes a message to the main and panic logs, and
7331 bombs out if it can't open /dev/null.
7333 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7334 interact so that it is all more flexible. It is supposed to remain
7335 backwards compatible. Also added extra_local_interfaces.
7337 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7338 to bomb out with an assertion failure - to the client this appears as a
7339 connection drop. This problem occurs in the part of the code that was taken
7340 from the Samba project. Fortunately, the assertion is in a very simple
7341 function, so I have fixed this by reproducing the function inline in the
7342 one place where it is called, and arranging for authentication to fail
7343 instead of killing the process with assert().
7345 75. The SPA client code was not working when the server requested OEM rather
7346 than Unicode encoding.
7348 76. Added code to make require_files with a specific uid setting more usable in
7349 the case where statting the file as root fails - usually a non-root-mounted
7350 NFS file system. When this happens and the failure is EACCES, Exim now
7351 forks a subprocess and does the per-uid checking as the relevant uid.
7353 77. Added process_log_path.
7355 78. If log_file_path was not explicitly set, a setting of check_log_space or
7356 check_log_inodes was ignored.
7358 79. If a space check for the spool or log partitions fails, the incident is now
7359 logged. Of course, in the latter case the data may get lost...
7361 80. Added the %p formatting code to string_format() so that it can be used to
7362 print addresses in debug_print(). Adjusted all the address printing in the
7363 debugging in store.c to use %p rather than %d.
7365 81. There was a concern that a line of code in smtp_in.c could overflow a
7366 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7367 initially expressed, the concern was not well-founded, because trailing
7368 spaces are removed early. However, if the trailing spaces were followed by
7369 a NULL, they did not get removed, so the overflow was possible. Two fixes
7372 (a) I re-wrote the offending code in a cleaner fashion.
7373 (b) If an incoming SMTP command contains a NULL character, it is rejected
7376 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7377 runs initgroups(), so that if the Exim user is in any additional groups,
7378 they will be used during message reception.
7384 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob