1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
12 side, to decode a TLS 1.3 packet capture.
14 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
15 Previously the default library behaviour applied, sending two, each in
18 JH/03 Debug output for ACL now gives the config file name and line number for
21 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
23 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
25 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
26 buffer overrun for (non-chunking) other transports.
28 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
29 TLS1.3, means that a server rejecting a client certificate is not visible
30 to the client until the first read of encrypted data (typically the
31 response to EHLO). Add detection for that case and treat it as a failed
32 TLS connection attempt, so that the normal retry-in-clear can work (if
35 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
36 and/or domain. Found and fixed by Jason Betts.
38 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
39 configuration). If a CNAME target was not a wellformed name pattern, a
42 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
43 the OS reports them interleaved with other addresses.
45 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
46 used both for input and for a verify callout, both encrypted, SMTP
47 responses being sent by the server could be lost. This resulted in
48 dropped connections and sometimes bounces generated by a peer sending
55 JH/01 Remove code calling the customisable local_scan function, unless a new
56 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
58 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
59 non-signal-safe functions being used.
61 JH/03 Bug 2269: When presented with a received message having a stupidly large
62 number of DKIM-Signature headers, disable DKIM verification to avoid
63 a resource-consumption attack. The limit is set at twenty.
65 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
66 report of oldest_pass in ${authres } in consequence, and separate out
67 some descriptions of reasons for verification fail.
69 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
70 files in the spool were present and unlocked. A queue-runner could spot
71 them, resulting in a duplicate delivery. Fix that by doing the unlock
72 after the unlink. Investigation by Tim Stewart. Take the opportunity to
73 add more error-checking on spoolfile handling while that code is being
76 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
77 No known attacks, no CVE, this is defensive hardening.
79 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
80 a queue-runner could start a delivery while other operations were ongoing.
81 Cutthrough delivery was a common victim, resulting in duplicate delivery.
82 Found and investigated by Tim Stewart. Fix by using the open message data
83 file handle rather than opening another, and not locally closing it (which
84 releases a lock) for that case, while creating the temporary .eml format
85 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
87 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
88 $sender_verify_failure/$recipient_verify_failure to "random".
90 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
93 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
94 Previously this would segfault.
96 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
99 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
100 like zero, since the resolver should be doing this for us, But we need one
101 as a CNAME but no MX presence gets the CNAME returned; we need to check
102 that doesn't point to an MX to declare it "no MX returned" rather than
103 "error, loop". A new main option is added so the older capability of
104 following some limited number of chain links is maintained.
106 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
108 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
109 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
110 now-deprecated earlier definitions used only specified the range up to TLS
111 1.2 (in the older-version library docs).
113 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
115 JH/15 Rework TLS client-side context management. Stop using a global, and
116 explicitly pass a context around. This enables future use of TLS for
117 connections to service-daemons (eg. malware scanning) while a client smtp
118 connection is using TLS; with cutthrough connections this is quite likely.
120 JH/16 Fix ARC verification to do AS checks in reverse order.
122 JH/17 Support a "tls" option on the ${readsocket } expansion item.
124 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
125 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
126 Previously the "utf8" would be re-prepended for every additional message.
128 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
129 Previously thery were accepted, resulting in issues when attempting to
130 forward messages to a non-supporting MTA.
132 PP/02 Let -n work with printing macros too, not just options.
134 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
135 one parent address was copied, and bogus data was used at delivery-logging
136 time. Either a crash (after delivery) or bogus log data could result.
137 Discovery and analysis by Tim Stewart.
139 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
140 Previously if the string ended mid-character, we did not insert the
141 promised '?' replacement.
143 PP/04 Documentation: current string operators work on bytes, not codepoints.
145 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
146 should pack well giving a smaller memory footprint so better caching and
147 therefore performance. Group the declarations where this can't be done so
148 that the byte-sized flag variables are not interspersed among pointer
149 variables, giving a better chance of good packing by the compiler.
151 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
152 non-null, to avoid issues with sites running BATV. Previously reports were
153 sent with an empty envelope sender so looked like bounces.
155 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
156 The ignore_error flag wasn't being returned from the filter subprocess so
157 was not set for later routers. Investigation and fix by Matthias Kurz.
159 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
160 and a msg:complete for the whole, when a message is manually removed using
161 -Mrm. Developement by Matthias Kurz, hacked on by JH.
163 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
164 a "Gnu special" function, asprintf() in the DB utility binary builds; I
165 hope that is portable enough.
167 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
168 requiring a known-CA anchor certificate; make it now rely entirely on the
169 TLSA as an anchor. Checking the name on the leaf cert against the name
170 on the A-record for the host is still done for TA (but not for EE mode).
172 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
173 included in delivery lines for non-proxied connections, when compiled with
174 SUPPORT_SOCKS and running with proxy logging enabled.
176 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
177 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
178 move the existing event to fire before the normal logging of message
179 failure so that custom logging is bracketed by normal logging.
181 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
182 msg:fail:internal event. Developement by Matthias Kurz.
184 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
185 far too small for todays use of crypto signatures stored there. Go all
186 the way to the max DNS message size of 64kB, even though this might be
187 overmuch for IOT constrained device use.
189 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
190 copy a string over itself. The library routine is documented as not
191 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
193 JH/32 For main options check_spool_space and check_inode_space, where the
194 platform supports 64b integers, support more than the previous 2^31 kB
195 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
196 the previous G, M, k.
198 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
199 $authenticated_fail_id variable on authentication failure. Previously
202 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
203 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
204 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
205 GNUTLS_SEC_PARAM_MEDIUM.
207 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
208 side. Previously we would continue as if no SNI had been received.
210 JH/36 Harden the handling of string-lists. When a list consisted of a sole
211 "<" character, which should be a list-separator specification, we walked
212 off past the nul-terimation.
214 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
215 causes) even when the retry time is not yet met. Previously they were
216 not, meaning that when (say) an account was over-quota and temp-rejecting,
217 and multiple senders' messages were queued, only one sender would get
218 notified on each configured delay_warning cycle.
220 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
222 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
223 cipher-suites, an error can be left on the stack even for a succeeding
224 accept; this results in impossible error messages when a later operation
227 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
228 return error codes indicating retry. Under TLS1.3 this becomes required.
230 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
231 it only wrote the new authenticators, resulting in a lack of tracking of
232 peer changes of ESMTP extensions until the next cache flush.
234 JH/41 Fix the loop reading a message header line to check for integer overflow,
235 and more-often against header_maxsize. Previously a crafted message could
236 induce a crash of the recive process; now the message is cleanly rejected.
238 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
239 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
245 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
246 When redis_servers is set to a list of > 1 element, and the Redis servers
247 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
248 case of MOVED into a DEFER case instead, thus moving the query onto the
249 next server in the list. For a cluster of N elements, all N servers must
250 be defined in redis_servers.
252 GF/02 Catch and remove uninitialized value warning in exiqsumm
253 Check for existence of @ARGV before looking at $ARGV[0]
255 JH/01 Replace the store_release() internal interface with store_newblock(),
256 which internalises the check required to safely use the old one, plus
257 the allocate and data copy operations duplicated in both (!) of the
258 extant use locations.
260 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
261 modifier. This matches the restriction on the commandline.
263 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
264 Previously only the last row was returned.
266 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
267 we assumed that tags in the header were well-formed, and parsed the
268 element content after inspecting only the first char of the tag.
269 Assumptions at that stage could crash the receive process on malformed
272 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
273 While running the DKIM ACL we operate on the Permanent memory pool so that
274 variables created with "set" persist to the DATA ACL. Also (at any time)
275 DNS lookups that fail create cache records using the Permanent pool. But
276 expansions release any allocations made on the current pool - so a dnsdb
277 lookup expansion done in the DKIM ACL releases the memory used for the
278 DNS negative-cache, and bad things result. Solution is to switch to the
279 Main pool for expansions.
280 While we're in that code, add checks on the DNS cache during store_reset,
281 active in the testsuite.
282 Problem spotted, and debugging aided, by Wolfgang Breyha.
284 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
285 When none of the hosts presented to a transport match an already-open
286 connection, close it and proceed with the list. Previously we would
287 queue the message. Spotted by Lena with Yahoo, probably involving
290 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
291 Previously a spurious "250 OK id=" response was appended to the proper
294 JH/08 The "support for" informational output now, which built with Content
295 Scanning support, has a line for the malware scanner interfaces compiled
296 in. Interface can be individually included or not at build time.
298 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
299 by the template makefile "src/EDITME". The "STREAM" support for an older
300 ClamAV interface method is removed.
302 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
303 rows affected is given instead).
305 JH/11 The runtime Berkeley DB library version is now additionally output by
306 "exim -d -bV". Previously only the compile-time version was shown.
308 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
309 SMTP connection. Previously, when one had more receipients than the
310 first, an abortive onward connection was made. Move to full support for
311 multiple onward connections in sequence, handling cutthrough connection
312 for all multi-message initiating connections.
314 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
315 routers. Previously, a multi-recipient message would fail to match the
316 onward-connection opened for the first recipient, and cause its closure.
318 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
319 a timeout on read on a GnuTLS initiating connection, resulting in the
320 initiating connection being dropped. This mattered most when the callout
321 was marked defer_ok. Fix to keep the two timeout-detection methods
324 JH/15 Relax results from ACL control request to enable cutthrough, in
325 unsupported situations, from error to silently (except under debug)
326 ignoring. This covers use with PRDR, frozen messages, queue-only and
329 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
331 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
332 metadata, resulting in a crash in free().
334 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
335 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
336 Broken also in d185889f4, with init system revamp.
338 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
339 Previously we abruptly closed the connection after reading a malware-
340 found indication; now we go on to read the "scan ok" response line,
343 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
344 ACL. Previously, a crash would result.
346 JH/19 Speed up macro lookups during configuration file read, by skipping non-
347 macro text after a replacement (previously it was only once per line) and
348 by skipping builtin macros when searching for an uppercase lead character.
350 JH/20 DANE support moved from Experimental to mainline. The Makefile control
351 for the build is renamed.
353 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
354 was allocated for every new TLS startup, meaning one per message. Fix
355 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
357 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
358 reported the original. Fix to report (as far as possible) the ACL
359 result replacing the original.
361 JH/23 Fix memory leak during multi-message connections using STARTTLS under
362 OpenSSL. Certificate information is loaded for every new TLS startup,
363 and the resources needed to be freed.
365 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
367 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
370 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
371 DATA response info to the (existing) per-recipient response info for
372 the "C=" log element. It can have useful tracking info from the
373 destination system. Patch from Simon Arlott.
375 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
376 length value. Previously this would segfault.
378 HS/02 Support Avast multiline protoocol, this allows passing flags to
379 newer versions of the scanner.
381 JH/28 Ensure that variables possibly set during message acceptance are marked
382 dead before release of memory in the daemon loop. This stops complaints
383 about them when the debug_store option is enabled. Discovered specifically
384 for sender_rate_period, but applies to a whole set of variables.
385 Do the same for the queue-runner and queue-list loops, for variables set
386 from spool message files. Do the same for the SMTP per-message loop, for
387 certain variables indirectly set in ACL operations.
389 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
390 as a multi-recipient message from a mailinglist manager). The coding had
391 an arbitrary cutoff number of characters while checking for more input;
392 enforced by writing a NUL into the buffer. This corrupted long / fast
393 input. The problem was exposed more widely when more pipelineing of SMTP
394 responses was introduced, and one Exim system was feeding another.
395 The symptom is log complaints of SMTP syntax error (NUL chars) on the
396 receiving system, and refused recipients seen by the sending system
397 (propating to people being dropped from mailing lists).
398 Discovered and pinpointed by David Carter.
400 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
401 replaced by the ${authresults } expansion.
403 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
405 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
406 allows proper process termination in container environments.
408 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
409 Previously the "final dot" had a newline after it; ensure it is CR,LF.
411 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
412 and "err_perm", deprecated since 4.83 when the RFC-defined words
413 "temperror" and "permerror" were introduced.
415 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
416 transport-filters or DKIM-signing. The restriction was lost in the
417 consolidation of verify-callout and delivery SMTP handling.
418 Extend the restriction to also cover ARC-signing.
420 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
421 in defer=pass mode supply a 450 to the initiator. Previously the message
424 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
425 tls_require_ciphers is used as before.
427 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
428 "pass_unscanned". Only tmpfails from the scanner are written to
429 the paniclog, as they may require admin intervention (permission
430 denied, license issues). Other scanner errors (like decompression
431 bombs) do not cause a paniclog entry.
433 JH/36 Fix reinitialisation of DKIM logging variable between messages.
434 Previously it was possible to log spurious information in receive log
437 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
438 triggered odd behaviour from Outlook Express clients.
440 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
443 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
444 since the IETF WG has not yet settled on that versus the original
445 "bare" representation.
447 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
448 Previously the millisecond value corrupted the output.
449 Fix also for syslog_pid=no and log_selector +pid, for which the pid
450 corrupted the output.
456 JH/01 Rework error string handling in TLS interface so that the caller in
457 more cases is responsible for logging. This permits library-sourced
458 string to be attached to addresses during delivery, and collapses
459 pairs of long lines into single ones.
461 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
462 during configuration. Wildcards are allowed and expanded.
464 JH/02 Rework error string handling in DKIM to pass more info back to callers.
465 This permits better logging.
467 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
468 do not close it down and have the child transport start it up again on
469 the passed-on TCP connection. Instead, proxy the child (and any
470 subsequent ones) for TLS via a unix-domain socket channel. Logging is
471 affected: the continued delivery log lines do not have any DNSSEC, TLS
472 Certificate or OCSP information. TLS cipher information is still logged.
474 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
475 identical IP addresses on different listening ports. Will also affect
478 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
479 add noisy ifdef guards to special-case this sillyness.
480 Patch from Bernd Kuhls.
482 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
483 than 255 are no longer allowed.
485 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
486 Disable the session-cache too, which might reduce our load. Since we
487 currrectly use a new context for every connection, both as server and
488 client, there is no benefit for these.
489 GnuTLS appears to not support tickets server-side by default (we don't
490 call gnutls_session_ticket_enable_server()) but client side is enabled
491 by default on recent versions (3.1.3 +) unless the PFS priority string
494 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
495 <https://reproducible-builds.org/specs/source-date-epoch/>.
497 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
498 the check for any unsuccessful recipients did not notice the limit, and
499 erroneously found still-pending ones.
501 JH/08 Pipeline CHUNKING command and data together, on kernels that support
502 MSG_MORE. Only in-clear (not on TLS connections).
504 JH/09 Avoid using a temporary file during transport using dkim. Unless a
505 transport-filter is involved we can buffer the headers in memory for
506 creating the signature, and read the spool data file once for the
507 signature and again for transmission.
509 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
510 4.77 as the kernel support then wasn't solid, having issues in 64bit
511 mode. Now, it's been long enough. Add support for FreeBSD also.
513 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
514 case where the routing stage had gathered several addresses to send to
515 a host before calling the transport for the first, we previously failed
516 to close down TLS in the old transport process before passing the TCP
517 connection to the new process. The new one sent a STARTTLS command
518 which naturally failed, giving a failed delivery and bloating the retry
519 database. Investigation and fix prototype from Wolfgang Breyha.
521 JH/12 Fix check on SMTP command input synchronisation. Previously there were
522 false-negatives in the check that the sender had not preempted a response
523 or prompt from Exim (running as a server), due to that code's lack of
524 awareness of the SMTP input buffering.
526 PP/04 Add commandline_checks_require_admin option.
527 Exim drops privileges sanely, various checks such as -be aren't a
528 security problem, as long as you trust local users with access to their
529 own account. When invoked by services which pass untrusted data to
530 Exim, this might be an issue. Set this option in main configuration
531 AND make fixes to the calling application, such as using `--` to stop
534 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
535 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
536 responses to those, into a single TLS record each way (this usually means
537 a single packet). As a side issue, smtp_enforce_sync now works on TLS
540 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
541 affects you only if you're dancing at the edge of the param size limits.
542 If you are, and this message makes sense to you, then: raise the
543 configured limit or use OpenSSL 1.1. Nothing we can do for older
546 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
547 cmdline element to get the documented default one. Previously it was
550 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
551 are unsuable for non-message-specific reasons - eg. connection timeout,
552 banner-time rejection.
554 JH/16 Fix logging of delivery remote port, when specified by router, under
557 PP/06 Repair manualroute's ability to take options in any order, even if one
558 is the name of a transport.
561 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
563 JH/17 Change the list-building routines interface to use the expanding-string
564 triplet model, for better allocation and copying behaviour.
566 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
567 Previously it was constructed the first time a possibly-matching string
568 was met in the configuration file input during startup; now it is done
571 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
572 compatible one, to avoid the (poorly documented) possibility of a config
573 file in the working directory redirecting the DB files, possibly correpting
574 some existing file. CVE-2017-10140 assigned for BDB.
576 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
577 cache-hot. Previously, although the result was properly cached, the
578 initial verify call returned a defer.
580 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
581 the main verify for receipient in uncached-mode.
583 JH/22 Retire historical build files to an "unsupported" subdir. These are
584 defined as "ones for which we have no current evidence of testing".
586 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
587 if present. Previously it was ignored.
589 JH/24 Start using specified-initialisers in C structure init coding. This is
590 a C99 feature (it's 2017, so now considered safe).
592 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
593 if was a fixed-sized field and bitmask ops via macros; it is now more
596 PP/07 GitHub PR 56: Apply MariaDB build fix.
597 Patch provided by Jaroslav Škarvada.
599 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
600 during Coverity cleanups [4.87 JH/47]
601 Diagnosis and fix provided by Michael Fischer v. Mollard.
603 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
604 the right size to place the terminating semicolon on its own folded
605 line, the header hash was calculated to an incorrect value thanks to
606 the (relaxed) space the fold became.
608 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
609 and confused the parent.
611 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
612 which could crash as a result. This could lead to undeliverable messages.
614 JH/28 Logging: "next input sent too soon" now shows where input was truncated
617 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
618 matters on fast-turnover and PID-randomising systems, which were getting
619 out-of-order delivery.
621 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
622 a possibly-overlapping copy. The symptom was that "Remote host closed
623 connection in response to HELO" was logged instead of the actual 4xx
626 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
627 Previously only that bufferd was discarded, resulting in SYMTP command
630 JH/32 DKIM: when a message has multiple signatures matching an identity given
631 in dkim_verify_signers, run the dkim acl once for each. Previously only
632 one run was done. Bug 2189.
634 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
635 "panic the current process" to "deliberately defer". The panic log is
636 still written with the problem list name; the mail and reject logs now
637 get a temp-reject line for the message that was being handled, saying
638 something like "domains check lookup or other defer". The SMTP 451
639 message is still "Temporary local problem".
641 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
642 A crafted sequence of BDAT commands could result in in-use memory beeing
643 freed. CVE-2017-16943.
645 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
646 from SMTP input. Previously it was always done; now only done for DATA
647 and not BDAT commands. CVE-2017-16944.
649 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
650 to the message (such as an overlong header line). Previously this was
651 not done and we did not exit BDAT mode. Followon from the previous item
652 though a different problem.
658 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
659 than -2003 did; needs libidn2 in addition to libidn.
661 JH/02 The path option on a pipe transport is now expanded before use.
663 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
664 Patch provided by "Björn", documentation fix added too.
666 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
667 missing a wire-to-host endian conversion.
669 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
670 close after a BDAT command line could be taken as a following command,
671 giving a synch failure. Fix by only checking for synch immediately
672 before acknowledging the chunk.
674 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
675 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
676 macro. Patches provided by Josh Soref.
678 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
679 Previously we did not; the RFC seems ambiguous and VRFY is not listed
680 by IANA as a service extension. However, John Klensin suggests that we
683 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
684 the dkim code may be unix-mode line endings rather than smtp wire-format
685 CRLF, so prepend a CR to any bare LF.
687 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
688 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
690 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
691 the first were themselves being wrongly included in the feed into dkim
692 processing; with most chunk sizes in use this resulted in an incorrect
693 body hash calculated value.
695 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
696 DKIM signature block, for verification. Although advised against by
697 standards it is specifically not ruled illegal.
699 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
701 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
702 missing a body hash (the bh= tag).
704 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
705 It seems that HAProxy sends the Proxy Protocol information in clear and
706 only then does a TLS startup, so do the same.
708 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
709 TCP connections (such as for Spamd) unless the daemon successfully set
710 Fast Open mode on its listening sockets. This fixes breakage seen on
711 too-old kernels or those not configured for Fast Open, at the cost of
712 requiring both directions being enabled for TFO, and TFO never being used
713 by non-daemon-related Exim processes.
715 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
716 endings, at least on the first header line. Try to canonify any that get
717 past that check, despite the cost.
719 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
720 now limited to an arbitrary five deep, while parsing addresses with the
721 strip_excess_angle_brackets option enabled.
723 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
724 instead leave the unprompted TLS handshake in socket buffer for the
725 TLS library to consume.
727 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
729 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
731 JH/16 Drop variables when they go out of scope. Memory management drops a whole
732 region in one operation, for speed, and this leaves assigned pointers
733 dangling. Add checks run only under the testsuite which checks all
734 variables at a store-reset and panics on a dangling pointer; add code
735 explicitly nulling out all the variables discovered. Fixes one known
736 bug: a transport crash, where a dangling pointer for $sending_ip_address
737 originally assigned in a verify callout, is re-used.
739 PP/06 Drop '.' from @INC in various Perl scripts.
741 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
743 PP/08 Reduce a number of compilation warnings under clang; building with
744 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
745 should be warning-free.
747 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
749 HS/01 Fix portability problems introduced by PP/08 for platforms where
750 realloc(NULL) is not equivalent to malloc() [SunOS et al].
752 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
753 chunk. This allows us to accept broken chunked messages. We need a more
754 general solution here.
756 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
757 already-broken messages in the queue.
759 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
761 JH/19 Fix reference counting bug in routing-generated-address tracking.
767 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
768 supports it and a size is available (ie. the sending peer gave us one).
770 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
771 years of being deprecated). The replacements are the ACLs
772 acl_smtp_mime and acl_not_smtp_mime.
774 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
775 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
776 or even an in-clear connection were permitted. Now, if the host lookup
777 was dnssec and dane was requested then the host is only used if the
778 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
779 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
780 if one fails this test.
781 This means that a poorly-configured remote DNS will make it incommunicado;
782 but it protects against a DNS-interception attack on it.
784 JH/04 Bug 1810: make continued-use of an open smtp transport connection
785 non-noisy when a race steals the message being considered.
787 JH/05 If main configuration option tls_certificate is unset, generate a
788 self-signed certificate for inbound TLS connections.
790 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
791 in rewrites and routers.
793 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
794 and logged a warning sing 4.83; now they are a configuration file error.
796 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
797 (lacking @domain). Apply the same qualification processing as RCPT.
799 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
801 JH/10 Support ${sha256:} applied to a string (as well as the previous
804 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
805 a cutthrough deliver is pending, as we always want to make a connection.
806 This also avoids re-routing the message when later placing the cutthrough
807 connection after a verify cache hit.
808 Do not update it with the verify result either.
810 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
811 when routing results in more than one destination address.
813 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
814 signing (which inhibits the cutthrough capability). Previously only
815 the presence of an option was tested; now an expansion evaluating as
816 empty is permissible (obviously it should depend only on data available
817 when the cutthrough connection is made).
819 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
820 the relevant preceding SMTP command did not note the pipelining mode.
822 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
823 Previously they were not counted.
825 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
826 as one having no matching records. Previously we deferred the message
827 that needed the lookup.
829 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
830 distinguished as "(=".
832 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
833 for missing MX records. Previously it only worked for missing A records.
835 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
837 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
838 after the data-go-ahead and data-ack. Patch from Jason Betts.
840 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
841 even for a "none" policy. Patch from Tony Meyer.
843 JH/22 Fix continued use of a connection for further deliveries. If a port was
844 specified by a router, it must also match for the delivery to be
847 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
848 When one of the recipients of a message was unsuitable for the connection
849 (has no matching addresses), we lost track of needing to mark it
850 deferred. As a result mail would be lost.
852 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
854 JH/25 Decoding ACL controls is now done using a binary search; the source code
855 takes up less space and should be simpler to maintain. Merge the ACL
856 condition decode tables also, with similar effect.
858 JH/26 Fix problem with one_time used on a redirect router which returned the
859 parent address unchanged. A retry would see the parent address marked as
860 delivered, so not attempt the (identical) child. As a result mail would
863 JH/27 Fix a possible security hole, wherein a process operating with the Exim
864 UID can gain a root shell. Credit to http://www.halfdog.net/ for
865 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
868 JH/28 Enable {spool,log} filesystem space and inode checks as default.
869 Main config options check_{log,spool}_{inodes,space} are now
870 100 inodes, 10MB unless set otherwise in the configuration.
872 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
873 Previously it only applied to the main-section connection policy
876 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
878 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
879 by me. Added RFC7919 DH primes as an alternative.
881 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
882 are not in the system include path.
884 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
885 GnuTLS, when a session startup failed (eg because the client disconnected)
886 Exim did stdio operations after fclose. This was exposed by a recent
887 change which nulled out the file handle after the fclose.
889 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
890 signed directly by the cert-signing cert, rather than an intermediate
891 OCSP-signing cert. This is the model used by LetsEncrypt.
893 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
895 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
896 an incoming connection.
898 HS/02 Bug 1802: Do not half-close the connection after sending a request
901 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
902 fallback to "prime256v1".
904 JH/34 SECURITY: Use proper copy of DATA command in error message.
905 Could leak key material. Remotely exploitable. CVE-2016-9963.
911 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
912 and 3.4.4 - once the server is enabled to respond to an OCSP request
913 it does even when not requested, resulting in a stapling non-aware
914 client dropping the TLS connection.
916 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
917 support variable-length bit vectors. No functional change.
919 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
920 The I= interface field on outgoing lines is now after the H= remote
921 host field, same as incoming lines. There is a separate
922 outgoing_interface log selector which allows you to disable the
925 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
926 If not running log_selector +smtp_connection the mainlog would be held
927 open indefinitely after a "too many connections" event, including to a
928 deleted file after a log rotate. Leave the per net connection logging
929 leaving it open for efficiency as that will be quickly detected by the
930 check on the next write.
932 HS/01 Bug 1671: Fix post transport crash.
933 Processing the wait-<transport> messages could crash the delivery
934 process if the message IDs didn't exist for some reason. When
935 using 'split_spool_directory=yes' the construction of the spool
936 file name failed already, exposing the same netto behaviour.
938 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
939 mime_regex ACL conditions.
941 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
942 to DSN fail messages (bounces): remote IP, remote greeting, remote response
943 to HELO, local diagnostic string.
945 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
946 log line to debug. Even when configured with a tls authenticator many
947 client connections are expected to not authenticate in this way, so
948 an authenticate fail is not an error.
950 HS/02 Add the Exim version string to the process info. This way exiwhat
951 gives some more detail about the running daemon.
953 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
954 matter for fast-change records such as DNSBLs.
956 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
957 retry record, even if constant. There may be multiple transports with
958 different interface settings and the retry behaviour needs to be kept
961 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
963 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
965 JH/10 Bug 840: fix log_defer_output option of pipe transport
967 JH/11 Bug 830: use same host for all RCPTS of a message, even under
968 hosts_randomize. This matters a lot when combined with mua_wrapper.
970 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
971 ${quote_pgsql:<string>} operator.
973 JH/13 Bug 1708: avoid misaligned access in cached lookup.
975 JH/14 Change header file name for freeradius-client. Relevant if compiling
976 with Radius support; from the Gentoo tree and checked under Fedora.
978 JH/15 Bug 1712: Introduce $prdr_requested flag variable
980 JH/16 Bug 1714: Permit an empty string as expansion result for transport
981 option transport_filter, meaning no filtering.
983 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
985 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
986 defaults to "*" (all hosts). The variable is now available when not built
987 with TLS, default unset, mainly to enable keeping the testsuite sane.
988 If a server certificate is not supplied (via tls_certificate) an error is
989 logged, and clients will find TLS connections fail on startup. Presumably
990 they will retry in-clear.
991 Packagers of Exim are strongly encouraged to create a server certificate
992 at installation time.
994 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
995 with the $config_file variable.
997 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
998 in transport context, after the attempt, and per-recipient. The latter type
999 is per host attempted. The event data is the error message, and the errno
1000 information encodes the lookup type (A vs. MX) used for the (first) host,
1001 and the trailing two digits of the smtp 4xx response.
1003 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1004 to write to mainlog (or rejectlog, paniclog) in the window between file
1005 creation and permissions/ownership being changed. Particularly affects
1006 installations where exicyclog is run as root, rather than exim user;
1007 result is that the running daemon panics and dies.
1009 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1011 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1012 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1013 "pri" and "weight". Note that the previous implicit priority given by the
1014 list order is no longer honoured.
1016 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1017 for DKIM processing.
1019 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1020 by defining SUPPORT_SOCKS.
1022 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1023 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1024 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1025 variables are renamed to proxy_{local,external}_{address,port}.
1027 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1028 for a build by defining SUPPORT_I18N
1030 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1031 of the query string, and make ${quote_redis:} do that quoting.
1033 JH/29 Move Events support from Experimental to mainline, enabled by default
1034 and removable for a build by defining DISABLE_EVENT.
1036 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1038 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1039 cached by the daemon.
1041 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1042 by defining LOOKUP_REDIS. The libhiredis library is required.
1044 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1045 keys are given for lookup.
1047 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1048 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1049 only supported when built with TLS support. The PolarSSL SHA routines
1050 are still used when the TLS library is too old for convenient support.
1052 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1053 openssl_options), for security. OpenSSL forces this from version 1.1.0
1054 server-side so match that on older versions.
1056 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1057 allocation for $value could be released as the expansion processing
1058 concluded, but leaving the global pointer active for it.
1060 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1061 and to use the domains and local_parts ACL conditions.
1063 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1064 incorrectly not doubled on cutthrough transmission, hence seen as a
1065 body-termination at the receiving system - resulting in truncated mails.
1066 Commonly the sender saw a TCP-level error, and retransmitted the message
1067 via the normal store-and-forward channel. This could result in duplicates
1068 received - but deduplicating mailstores were liable to retain only the
1069 initial truncated version.
1071 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1073 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1075 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1076 we're in there, support oversigning also; bug 1309.
1078 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1080 HS/04 Add support for keep_environment and add_environment options.
1082 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1083 either intentional arithmetic overflow during PRNG, or testing config-
1086 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1087 delivery resulted in actual delivery. Cancel cutthrough before DATA
1090 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1091 rejects a recipient: pass the reject to the originator.
1093 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1094 Many were false-positives and ignorable, but it's worth fixing the
1097 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1098 for the new environment-manipulation done at startup. Move the routines
1099 from being local to tls.c to being global via the os.c file.
1101 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1102 an extract embedded as result-arg for a map, the first arg for extract
1103 is unavailable so we cannot tell if this is a numbered or keyed
1104 extraction. Accept either.
1110 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1113 JH/02 The smtp transport option "multi_domain" is now expanded.
1115 JH/03 The smtp transport now requests PRDR by default, if the server offers
1118 JH/04 Certificate name checking on server certificates, when exim is a client,
1119 is now done by default. The transport option tls_verify_cert_hostnames
1120 can be used to disable this per-host. The build option
1121 EXPERIMENTAL_CERTNAMES is withdrawn.
1123 JH/05 The value of the tls_verify_certificates smtp transport and main options
1124 default to the word "system" to access the system default CA bundle.
1125 For GnuTLS, only version 3.0.20 or later.
1127 JH/06 Verification of the server certificate for a TLS connection is now tried
1128 (but not required) by default. The verification status is now logged by
1129 default, for both outbound TLS and client-certificate supplying inbound
1132 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1135 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1136 Status Notification (bounce) messages are now MIME format per RFC 3464.
1137 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1138 under the control of the dsn_advertise_hosts option, and routers may
1139 have a dsn_lasthop option.
1141 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1142 default, modifiable by a malware= option. The list separator for
1143 the options can now be changed in the usual way. Bug 68.
1145 JH/10 The smtp_receive_timeout main option is now expanded before use.
1147 JH/11 The incoming_interface log option now also enables logging of the
1148 local interface on delivery outgoing connections.
1150 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1151 if the interface and destination host and port all match.
1153 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1156 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1157 Patch from Andrew Lewis.
1159 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1160 now supports optional time-restrictions, weighting, and priority
1161 modifiers per server. Patch originally by <rommer@active.by>.
1163 JH/16 The spamd_address main option now supports a mixed list of local
1164 and remote servers. Remote servers can be IPv6 addresses, and
1165 specify a port-range.
1167 JH/17 Bug 68: The spamd_address main option now supports an optional
1168 timeout value per server.
1170 JH/18 Bug 1581: Router and transport options headers_add/remove can
1171 now have the list separator specified.
1173 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1176 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1179 JH/21 Support for the A6 type of dns record is withdrawn.
1181 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1182 rather than the verbs used.
1184 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1185 from 255 to 1024 chars.
1187 JH/24 Verification callouts now attempt to use TLS by default.
1189 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1190 are generic router options now. The defaults didn't change.
1192 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1193 Original patch from Alexander Shikoff, worked over by JH.
1195 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1196 files if ZCAT_COMMAND is not executable.
1198 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1200 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1202 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1203 Normally benign, it bites when the pair was led to by a CNAME;
1204 modern usage is to not canonicalize the domain to a CNAME target
1205 (and we were inconsistent anyway for A-only vs AAAA+A).
1207 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1209 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1210 when evaluating $sender_host_dnssec.
1212 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1213 $sender_helo_dnssec variable.
1215 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1217 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1219 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1221 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1222 documented as working, but never had. Support all but $spam_report.
1224 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1225 added for tls authenticator.
1227 HS/03 Add perl_taintmode main config option
1233 TL/01 When running the test suite, the README says that variables such as
1234 no_msglog_check are global and can be placed anywhere in a specific
1235 test's script, however it was observed that placement needed to be near
1236 the beginning for it to behave that way. Changed the runtest perl
1237 script to read through the entire script once to detect and set these
1238 variables, reset to the beginning of the script, and then run through
1239 the script parsing/test process like normal.
1241 TL/02 The BSD's have an arc4random API. One of the functions to induce
1242 adding randomness was arc4random_stir(), but it has been removed in
1243 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1244 function when detected.
1246 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1247 cause callback expansion.
1249 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1250 syntax errors in an expansion can be treated as a string instead of
1251 logging or causing an error, due to the internal use of bool_lax
1252 instead of bool when processing it.
1254 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1255 server certificates when making smtp deliveries.
1257 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1259 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1261 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1263 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1264 Merged patch from Sebastian Wiedenroth.
1266 JH/05 Fix results-pipe from transport process. Several recipients, combined
1267 with certificate use, exposed issues where response data items split
1268 over buffer boundaries were not parsed properly. This eventually
1269 resulted in duplicates being sent. This issue only became common enough
1270 to notice due to the introduction of connection certificate information,
1271 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1273 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1274 size buffer was used, resulting in syntax errors when an expansion
1277 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1278 version 3.3.6 or later.
1280 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1281 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1282 both become "event_action", the variables become $event_name, $event_data
1283 and $event_defer_errno. There is a new variable $verify_mode, usable in
1284 routers, transports and related events. The tls:cert event is now also
1285 raised for inbound connections, if the main configuration event_action
1288 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1289 early OCSP support, but no stapling (appears to be less than 1.0.0).
1291 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1292 server certificate names available under the smtp transport option
1293 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1296 JH/10 Time-related extraction expansions from certificates now use the main
1297 option "timezone" setting for output formatting, and are consistent
1298 between OpenSSL and GnuTLS compilations. Bug 1541.
1300 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1301 encoded parameter in the incoming message. Bug 1558.
1303 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1304 include certificate info, eximon was claiming there were spoolfile
1307 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1309 JH/14 Log delivery-related information more consistently, using the sequence
1310 "H=<name> [<ip>]" wherever possible.
1312 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1313 are problematic for Debian distribution, omit them from the release
1316 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1318 JH/16 Fix string representation of time values on 64bit time_t architectures.
1321 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1322 output list separator was used.
1327 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1328 checkers that were complaining about end of non-void function with no
1331 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1332 This was a regression introduced in 4.83 by another bugfix.
1334 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1336 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1337 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1343 TF/01 Correctly close the server side of TLS when forking for delivery.
1345 When a message was received over SMTP with TLS, Exim failed to clear up
1346 the incoming connection properly after forking off the child process to
1347 deliver the message. In some situations the subsequent outgoing
1348 delivery connection happened to have the same fd number as the incoming
1349 connection previously had. Exim would try to use TLS and fail, logging
1350 a "Bad file descriptor" error.
1352 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1353 utilities have not been installed.
1355 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1356 temporary space as the ACL may create new global variables.
1358 TL/01 LDAP support uses per connection or global context settings, depending
1359 upon the detected version of the libraries at build time.
1361 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1362 to extract and use the src ip:port in logging and expansions as if it
1363 were a direct connection from the outside internet. PPv2 support was
1364 updated based on HAProxy spec change in May 2014.
1366 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1368 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1369 Properly escape header and check for NULL return.
1371 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1374 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1376 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1377 characters in header names, implemented as a verify condition.
1378 Contributed by Michael Fischer v. Mollard.
1380 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1381 results permerror and temperror. Previous values are deprecated but
1382 still accepted. In a future release, err_perm and err_temp will be
1383 completely removed, which will be a backward incompatibility if the
1384 ACL tests for either of these two old results. Patch contributed by
1385 user bes-internal on the mailing list.
1387 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1389 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1390 selectors, in both main and reject logs.
1392 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1395 JH/07 Add malware type "sock" for talking to simple daemon.
1397 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1399 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1400 routers/transports under cutthrough routing.
1402 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1403 numbers. Touch up "bool" conditional to keep the same definition.
1405 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1407 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1409 JH/12 Expand items in router/transport headers_add or headers_remove lists
1410 individually rather than the list as a whole. Bug 1452.
1412 Required for reasonable handling of multiple headers_ options when
1413 they may be empty; requires that headers_remove items with embedded
1414 colons must have them doubled (or the list-separator changed).
1416 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1417 view the policy declared in the DMARC record. Currently, $dmarc_status
1418 is a combined value of both the record presence and the result of the
1421 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1423 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1424 dnslookup router and the smtp transport (applying to the forward
1427 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1428 of ldap servers used for a specific lookup. Patch provided by Heiko
1431 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1432 New variable $lookup_dnssec_authenticated for observability.
1434 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1435 Patch submitted by Lars Timman.
1437 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1439 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1440 Requires trusted mode and valid format message id, aborts otherwise.
1441 Patch contributed by Heiko Schlichting.
1443 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1444 certextract with support for various fields. Bug 1358.
1446 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1447 is requested by default, modifiable by smtp transport option
1450 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1451 operate on certificate variables to give certificate fingerprints
1452 Also new ${sha256:cert_variable}.
1454 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1456 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1457 Christian Aistleitner.
1459 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1461 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1462 file. Patch from Wolfgang Breyha.
1464 JH/25 Expand the coverage of the delivery $host and $host_address to
1465 client authenticators run in verify callout. Bug 1476.
1467 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1468 align with daemon_smtp_ports. Bug 72.
1470 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1471 support and error reporting did not work properly.
1473 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1474 and is readable. Patch from Andrew Colin Kissa.
1476 TL/14 Enhance documentation of ${run expansion and how it parses the
1477 commandline after expansion, particularly in the case when an
1478 unquoted variable expansion results in an empty value.
1480 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1482 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1483 by renaming away from it. Addresses GH issue 15, reported by
1486 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1488 TL/15 SECURITY: prevent double expansion in math comparison functions
1489 (can expand unsanitized data). Not remotely exploitable.
1496 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1498 PP/02 Make -n do something, by making it not do something.
1499 When combined with -bP, the name of an option is not output.
1501 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1504 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1505 $sender_host_name and config options to manage this, and basic check
1508 PP/05 DSCP support for outbound connections and control modifier for inbound.
1510 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1511 (Only plugin which currently uses this is kerberos4, which nobody should
1512 be using, but we should make it available and other future plugins might
1513 conceivably use it, even though it would break NAT; stuff *should* be
1514 using channel bindings instead).
1516 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1517 name; added for Sendmail compatibility; requires admin caller.
1518 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1519 just ignore it); requires trusted caller.
1520 Also parse but ignore: -Ac -Am -X<logfile>
1523 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1525 TL/02 Add +smtp_confirmation as a default logging option.
1527 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1528 Patch by Magnus Holmgren from 2007-02-20.
1530 TL/04 Bugzilla 1281 - Spec typo.
1531 Bugzilla 1283 - Spec typo.
1532 Bugzilla 1290 - Spec grammar fixes.
1534 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1536 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1538 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1539 mailing list by by Dmitry Isaikin.
1541 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1543 JH/02 Support "G" suffix to numbers in ${if comparisons.
1545 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1547 NM/01 Bugzilla 1197 - Spec typo
1548 Bugzilla 1196 - Spec examples corrections
1550 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1552 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1553 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1556 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1557 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1559 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1560 "acl {{name}{arg}...}", and optional args on acl condition
1563 JH/05 Permit multiple router/transport headers_add/remove lines.
1565 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1567 JH/07 Avoid using a waiting database for a single-message-only transport.
1568 Performance patch from Paul Fisher. Bugzilla 1262.
1570 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1573 JH/09 Add $headers_added variable, with content from use of ACL modifier
1574 add_header (but not yet added to the message). Bugzilla 199.
1576 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1577 Pulled from Bugzilla 817 by Wolfgang Breyha.
1579 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1581 (nb: this is the same fix as in Exim 4.80.1)
1583 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1586 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1589 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1591 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1592 advertise SMTP AUTH mechanism to us, instead of a generic
1593 protocol violation error. Also, make Exim more robust to bad
1594 data from the Dovecot auth socket.
1596 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1598 When a queue runner is handling a message, Exim first routes the
1599 recipient addresses, during which it prunes them based on the retry
1600 hints database. After that it attempts to deliver the message to
1601 any remaining recipients. It then updates the hints database using
1604 So if a recipient address works intermittently, it can get repeatedly
1605 deferred at routing time. The retry hints record remains fresh so the
1606 address never reaches the final cutoff time.
1608 This is a fairly common occurrence when a user is bumping up against
1609 their storage quota. Exim had some logic in its local delivery code
1610 to deal with this. However it did not apply to per-recipient defers
1611 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1613 This change adds a proper retry rule check during routing so that the
1614 final cutoff time is checked against the message's age. We only do
1615 this check if there is an address retry record and there is not a
1616 domain retry record; this implies that previous attempts to handle
1617 the address had the retry_use_local_parts option turned on. We use
1618 this as an approximation for the destination being like a local
1619 delivery, as in LMTP.
1621 I suspect this new check makes the old local delivery cutoff check
1622 redundant, but I have not verified this so I left the code in place.
1624 TF/02 Correct gecos expansion when From: is a prefix of the username.
1626 Test 0254 submits a message to Exim with the header
1630 When I ran the test suite under the user fanf2, Exim expanded
1631 the header to contain my full name, whereas it should have added
1632 a Resent-Sender: header. It erroneously treats any prefix of the
1633 username as equal to the username.
1635 This change corrects that bug.
1637 GF/01 DCC debug and logging tidyup
1638 Error conditions log to paniclog rather than rejectlog.
1639 Debug lines prefixed by "DCC: " to remove any ambiguity.
1641 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1643 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1644 Bug spotted by Jeremy Harris; was flawed since initial commit.
1645 Would have resulted in OCSP responses post-SNI triggering an Exim
1646 NULL dereference and crash.
1648 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1650 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1651 Bug detection, analysis and fix by Samuel Thibault.
1652 Bugzilla 1331, Debian bug #698092.
1654 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1656 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1657 Server implementation by Todd Lyons, client by JH.
1658 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1659 config variable "prdr_enable" controls whether the server
1660 advertises the facility. If the client requests PRDR a new
1661 acl_data_smtp_prdr ACL is called once for each recipient, after
1662 the body content is received and before the acl_smtp_data ACL.
1663 The client is controlled by both of: a hosts_try_prdr option
1664 on the smtp transport, and the server advertisement.
1665 Default client logging of deliveries and rejections involving
1666 PRDR are flagged with the string "PRDR".
1668 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1669 fclose(). Diagnosis by Todd Lyons.
1671 PP/17 Update configure.default to handle IPv6 localhost better.
1672 Patch by Alain Williams (plus minor tweaks).
1675 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1676 This is now consistent with GnuTLS, and is now documented: the
1677 previous undocumented portable approach to treating the option as
1678 unset was to force an expansion failure. That still works, and
1679 an empty string is now equivalent.
1681 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1682 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1683 not performing validation itself.
1685 PP/20 Added force_command boolean option to pipe transport.
1686 Patch from Nick Koston, of cPanel Inc.
1688 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1691 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1693 PP/21 Fix eximon continuous updating with timestamped log-files.
1694 Broken in a format-string cleanup in 4.80, missed when I repaired the
1695 other false fix of the same issue.
1696 Report and fix from Heiko Schlichting.
1699 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1700 Report from Prashanth Katuri.
1702 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1703 It's SecureTransport, so affects any MacOS clients which use the
1704 system-integrated TLS libraries, including email clients.
1706 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1707 using a MIME ACL for non-SMTP local injection.
1708 Report and assistance in diagnosis by Warren Baker.
1710 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1712 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1714 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1715 last id that failed so it may be referenced in subsequent ACL's.
1717 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1720 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1721 ldap library initialization, allowing self-signed CA's to be
1722 used. Also properly sets require_cert option later in code by
1723 using NULL (global ldap config) instead of ldap handle (per
1724 session). Bug diagnosis and testing by alxgomz.
1726 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1727 the src/util/ subdirectory.
1729 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1730 renamed to Transport Post Delivery Action by Jeremy Harris, as
1733 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1734 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1735 redis_servers = needs to be configured which will be used by the redis
1736 lookup. Patch from Warren Baker, of The Packet Hub.
1738 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1740 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1741 hostname or reverse DNS when processing a host list. Used suggestions
1742 from multiple comments on this bug.
1744 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1746 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1747 Missed a few lines, added it to make the runtest require no keyboard
1750 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1751 contains upper case chars. Make router use caseful_local_part.
1753 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1754 support when GnuTLS has been built with p11-kit.
1760 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1762 This, or similar/improved, will also be change PP/11 of 4.82.
1768 PP/01 Handle short writes when writing local log-files.
1769 In practice, only affects FreeBSD (8 onwards).
1770 Bugzilla 1053, with thanks to Dmitry Isaikin.
1772 NM/01 Bugzilla 949 - Documentation tweak
1774 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1777 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1779 PP/02 Implemented gsasl authenticator.
1781 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1783 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1784 `pkg-config foo` for cflags/libs.
1786 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1787 with rest of GSASL and with heimdal_gssapi.
1789 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1790 `pkg-config foo` for cflags/libs for the TLS implementation.
1792 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1793 properties get this fed in as external SSF. A number of robustness
1794 and debugging improvements to the cyrus_sasl authenticator.
1796 PP/08 cyrus_sasl server now expands the server_realm option.
1798 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1799 Patch by Jeremy Harris.
1801 PP/10 Added dbmjz lookup type.
1803 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1805 PP/12 MAIL args handles TAB as well as SP, for better interop with
1806 non-compliant senders.
1807 Analysis and variant patch by Todd Lyons.
1809 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1810 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1811 Patch from Dirk Mueller <dmueller@suse.com>
1813 PP/13 tls_peerdn now print-escaped for spool files.
1814 Observed some $tls_peerdn in wild which contained \n, which resulted
1815 in spool file corruption.
1817 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1818 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1819 or write after TLS renegotiation, which otherwise led to messages
1822 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1823 as a tracking header (ie: a signed header comes before the signature).
1824 Patch from Wolfgang Breyha.
1826 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1827 comma-sep list; embedded commas doubled.
1829 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1831 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1833 Report and patch from Dmitry Banschikov.
1835 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1836 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1837 failures. We appear to now support TLS1.1+ with Exim.
1839 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1840 lets Exim select keys and certificates based upon TLS SNI from client.
1841 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1842 before an outbound SMTP session. New log_selector, +tls_sni.
1844 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1845 NULL dereference. Report and patch from Alun Jones.
1847 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1848 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1849 Not seeing resolver debug output on NetBSD, but suspect this is a
1850 resolver implementation change.
1852 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1853 Left warnings. Added "eximon gdb" invocation mode.
1855 PP/21 Defaulting "accept_8bitmime" to true, not false.
1857 PP/22 Added -bw for inetd wait mode support.
1859 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1860 locate the relevant includes and libraries. Made this the default.
1862 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1863 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1865 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1866 This may cause build issues on older platforms.
1868 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1869 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1870 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1871 Added SNI support via GnuTLS too.
1872 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1874 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1876 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1877 Applied second patch from Janne, implementing suggestion to default
1878 multiple-strings-in-record handling to match SPF spec.
1880 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1882 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1883 read-only, out of scope).
1884 Patch from Wolfgang Breyha, report from Stuart Northfield.
1886 PP/29 Fix three issues highlighted by clang analyser static analysis.
1887 Only crash-plausible issue would require the Cambridge-specific
1888 iplookup router and a misconfiguration.
1889 Report from Marcin Mirosław.
1891 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1893 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1894 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1895 As part of this, removing so much warning spew let me fix some minor
1896 real issues in debug logging.
1898 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1899 assignment on my part. Fixed.
1901 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1902 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1903 Janne Snabb (who went above and beyond: thank you).
1905 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1906 string otherwise requires a connection and a bunch more work and it's
1907 relatively easy to get wrong. Should also expose TLS library linkage
1910 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1911 64-bit ${eval} (JH/03).
1913 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1914 GNU libc to support some of the 64-bit stuff, should not lead to
1915 conflicts. Defined before os.h is pulled in, so if a given platform
1916 needs to override this, it can.
1918 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1919 protection layer was required, which is not implemented.
1920 Bugzilla 1254, patch from Wolfgang Breyha.
1922 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1923 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1924 tls_dhparam take prime identifiers. Also unbreak combination of
1925 OpenSSL+DH_params+TLSSNI.
1927 PP/39 Disable SSLv2 by default in OpenSSL support.
1933 PP/01 Solaris build fix for Oracle's LDAP libraries.
1934 Bugzilla 1109, patch from Stephen Usher.
1936 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1938 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1941 TF/02 Fix a couple more cases where we did not log the error message
1942 when unlink() failed. See also change 4.74-TF/03.
1944 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1945 lock up or crash if it happened to be inside a call to libc when it
1946 got a SIGUSR1 from exiwhat.
1948 The SIGUSR1 handler appends the current process status to the process
1949 log which is later printed by exiwhat. It used to use the general
1950 purpose logging code to do this, but several functions it calls are
1951 not safe for signals.
1953 The new output code in the SIGUSR1 handler is specific to the process
1954 log, and simple enough that it's easy to inspect for signal safety.
1955 Removing some special cases also simplifies the general logging code.
1956 Removing the spurious timestamps from the process log simplifies
1959 TF/04 Improved ratelimit ACL condition.
1961 The /noupdate option has been deprecated in favour of /readonly which
1962 has clearer semantics. The /leaky, /strict, and /readonly update modes
1963 are mutually exclusive. The update mode is no longer included in the
1964 database key; it just determines when the database is updated. (This
1965 means that when you upgrade Exim will forget old rate measurements.)
1967 Exim now checks that the per_* options are used with an update mode that
1968 makes sense for the current ACL. For example, when Exim is processing a
1969 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1970 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1971 must specify per_mail/readonly. If you omit the update mode it defaults to
1972 /leaky where that makes sense (as before) or /readonly where required.
1974 The /noupdate option is now undocumented but still supported for
1975 backwards compatibility. It is equivalent to /readonly except that in
1976 ACLs where /readonly is required you may specify /leaky/noupdate or
1977 /strict/noupdate which are treated the same as /readonly.
1979 A useful new feature is the /count= option. This is a generalization
1980 of the per_byte option, so that you can measure the throughput of other
1981 aggregate values. For example, the per_byte option is now equivalent
1982 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1984 The per_rcpt option has been generalized using the /count= mechanism
1985 (though it's more complicated than the per_byte equivalence). When it is
1986 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1987 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1988 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1989 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1990 Note that using per_rcpt with a non-readonly update mode in more than
1991 one ACL will cause the recipients to be double-counted. (The per_mail
1992 and per_byte options don't have this problem.)
1994 The handling of very low rates has changed slightly. If the computed rate
1995 is less than the event's count (usually one) then this event is the first
1996 after a long gap. In this case the rate is set to the same as this event's
1997 count, so that the first message of a spam run is counted properly.
1999 The major new feature is a mechanism for counting the rate of unique
2000 events. The new per_addr option counts the number of different
2001 recipients that someone has sent messages to in the last time period. It
2002 behaves like per_rcpt if all the recipient addresses are different, but
2003 duplicate recipient addresses do not increase the measured rate. Like
2004 the /count= option this is a general mechanism, so the per_addr option
2005 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2006 example, measure the rate that a client uses different sender addresses
2007 with the options per_mail/unique=$sender_address. There are further
2008 details in the main documentation.
2010 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2012 TF/06 Removed a few PCRE remnants.
2014 TF/07 Automatically extract Exim's version number from tags in the git
2015 repository when doing development or release builds.
2017 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2018 Bugzilla 879. Patch from Paul Fisher.
2020 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2021 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2024 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2026 PP/05 Variable $av_failed, true if the AV scanner deferred.
2027 Bugzilla 1078. Patch from John Horne.
2029 PP/06 Stop make process more reliably on build failure.
2030 Bugzilla 1087. Patch from Heiko Schlittermann.
2032 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2033 Bugzilla 1089. Patch from Heiko Schlittermann.
2035 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2036 Bugzilla 1131. Patch from Holger Weiß.
2038 PP/09 Handle IPv6 addresses with SPF.
2039 Bugzilla 860. Patch from Wolfgang Breyha.
2041 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2043 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2046 PP/11 match_* no longer expand right-hand-side by default.
2047 New compile-time build option, EXPAND_LISTMATCH_RHS.
2048 New expansion conditions, "inlist", "inlisti".
2050 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2052 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2054 PP/14 fix log_write() format string regression from TF/03.
2055 Bugzilla 1152. Patch from Dmitry Isaikin.
2061 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2063 PP/02 Harmonised TLS library version reporting; only show if debugging.
2064 Layout now matches that introduced for other libraries in 4.74 PP/03.
2066 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2068 PP/04 New "dns_use_edns0" global option.
2070 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2073 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2074 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2076 TK/01 Updated PolarSSL code to 0.14.2.
2077 Bugzilla 1097. Patch from Andreas Metzler.
2079 PP/07 Catch divide-by-zero in ${eval:...}.
2080 Fixes bugzilla 1102.
2082 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2085 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2086 format-string attack -- SECURITY: remote arbitrary code execution.
2088 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2089 time unintentionally subject to list matching rules, letting the header
2090 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2091 arbitrary string expansion). This allowed for information disclosure.
2093 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2094 INT_MIN/-1 -- value coerced to INT_MAX.
2100 NM/01 Workaround for PCRE version dependency in version reporting
2103 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2104 This fixes portability to compilers other than gcc, notably
2105 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2107 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2108 makefiles for portability to HP-UX and POSIX correctness.
2110 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2111 Also via indented variable definition in the Makefile.
2112 (Debugging by Oliver Heesakkers).
2114 PP/02 Restore caching of spamd results with expanded spamd_address.
2115 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2117 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2118 Improves build reliability. Fix from: Frank Elsner
2120 NM/02 Fix wide character breakage in the rfc2047 coding
2121 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2123 NM/03 Allow underscore in dnslist lookups
2124 Fixes bug 1026. Patch from Graeme Fowler
2126 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2127 Code patches from Adam Ciarcinski of NetBSD.
2129 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2132 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2133 is logged, to avoid truncation. Patch from John Horne.
2135 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2136 Patch from Jakob Hirsch.
2138 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2139 SQL string expansion failure details.
2140 Patch from Andrey Oktyabrski.
2142 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2143 Patch from Simon Arlott.
2145 PP/09 New lookups functionality failed to compile on old gcc which rejects
2146 extern declarations in function scope.
2147 Patch from Oliver Fleischmann
2149 PP/10 Use sig_atomic_t for flags set from signal handlers.
2150 Check getgroups() return and improve debugging.
2151 Fixed developed for diagnosis in bug 927 (which turned out to be
2154 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2155 Patch from Mark Zealey.
2157 PP/12 Bugzilla 1056: Improved spamd server selection.
2158 Patch from Mark Zealey.
2160 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2161 Based on patch from Heiko Schlittermann.
2163 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2164 Patch from Uwe Doering, sign-off by Michael Haardt.
2166 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2167 variable declaration deep within a block. Bug and patch from
2170 PP/15 lookups-Makefile IRIX compatibility coercion.
2172 PP/16 Make DISABLE_DKIM build knob functional.
2174 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2175 Patch by Simon Arlott
2177 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2178 variable argument macros. Our copy now differs from upstream.
2184 TF/01 Failure to get a lock on a hints database can have serious
2185 consequences so log it to the panic log.
2187 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2188 controlled using the smtp_confirmation log selector.
2190 TF/03 Include the error message when we fail to unlink a spool file.
2192 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2193 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2194 for maintaining out-of-tree patches for some time.
2196 PP/01 Bugzilla 139: Documentation and portability issues.
2197 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2198 Handle per-OS dynamic-module compilation flags.
2200 PP/02 Let /dev/null have normal permissions.
2201 The 4.73 fixes were a little too stringent and complained about the
2202 permissions on /dev/null. Exempt it from some checks.
2203 Reported by Andreas M. Kirchwitz.
2205 PP/03 Report version information for many libraries, including
2206 Exim version information for dynamically loaded libraries. Created
2207 version.h, now support a version extension string for distributors
2208 who patch heavily. Dynamic module ABI change.
2210 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2211 privilege escalation vulnerability whereby the Exim run-time user
2212 can cause root to append content of the attacker's choosing to
2215 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2218 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2219 If dropping privileges for untrusted macros, we disabled normal logging
2220 on the basis that it would fail; for the Exim run-time user, this is not
2221 the case, and it resulted in successful deliveries going unlogged.
2222 Fixed. Reported by Andreas Metzler.
2228 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2229 only prepend for the Resent-* case. Fixes regression introduced in
2230 Exim 4.70 by NM/22 for Bugzilla 607.
2232 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2233 increasing numbers of administrators be bitten by this.
2235 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2237 PP/03 Bugzilla 994: added openssl_options main configuration option.
2239 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2241 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2243 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2245 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2246 without a peer certificate, leading to a segfault because of an
2247 assumption that peers always have certificates. Be a little more
2248 paranoid. Problem reported by Martin Tscholak.
2250 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2251 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2252 NB: ClamAV planning to remove STREAM in "middle of 2010".
2253 CL also introduces -bmalware, various -d+acl logging additions and
2254 more caution in buffer sizes.
2256 PP/09 Implemented reverse_ip expansion operator.
2258 PP/10 Bugzilla 937: provide a "debug" ACL control.
2260 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2262 PP/12 Bugzilla 973: Implement --version.
2264 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2266 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2268 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2270 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2271 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2272 ignore trailing whitespace.
2274 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2276 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2279 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2280 Notification from Dr Andrew Aitchison.
2282 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2283 ExtendedDetectionInfo response format.
2284 Notification from John Horne.
2286 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2289 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2290 XSL and documented dependency on system catalogs, with examples of how
2293 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2296 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2297 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2298 configuration file which is writeable by the Exim user or group.
2300 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2301 of configuration files to cover files specified with the -C option if
2302 they are going to be used with root privileges, not just the default
2305 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2306 option (effectively making it always true).
2308 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2309 files to be used while preserving root privileges.
2311 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2312 that rogue child processes cannot use them.
2314 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2315 run-time user, instead of root.
2317 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2318 Exim run-time user without dropping privileges.
2320 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2321 result string, instead of calling string_vformat() twice with the same
2324 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2325 for other users. Others should always drop root privileges if they use
2326 -C on the command line, even for a whitelisted configure file.
2328 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2330 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2336 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2337 $data_path, and $header_path variables; fixed documentation bugs and
2340 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2341 exipick to access non-standard spools, including the "frozen" queue
2344 NM/01 Bugzilla 965: Support mysql stored procedures.
2345 Patch from Alain Williams
2347 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2349 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2350 Patch from Andreas Metzler
2352 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2353 Patch from Kirill Miazine
2355 NM/05 Bugzilla 671: Added umask to procmail example.
2357 JJ/03 installed exipick 20100323.0, fixing doc bug
2359 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2360 directory. Notification and patch from Dan Rosenberg.
2362 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2364 TK/02 Improve log output when DKIM signing operation fails.
2366 MH/01 Treat the transport option dkim_domain as a colon separated
2367 list, not as a single string, and sign the message with each element,
2368 omitting multiple occurences of the same signer.
2370 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2371 Bugzilla 985, 986. Patch by Simon Arlott
2373 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2374 Patch by Simon Arlott
2376 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2377 MBX locking. Notification from Dan Rosenberg.
2383 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2385 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2387 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2389 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2391 NM/04 Bugzilla 915: Flag broken perl installation during build.
2397 TK/01 Added patch by Johannes Berg that expands the main option
2398 "spamd_address" if it starts with a dollar sign.
2400 TK/02 Write list of recipients to X-Envelope-Sender header when building
2401 the mbox-format spool file for content scanning (suggested by Jakob
2404 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2405 (http://www.dcc-servers.net/) support via dccifd. Activated by
2406 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2408 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2409 by Mark Daniel Reidel <mr@df.eu>.
2411 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2412 When building exim an external PCRE library is now needed -
2413 PCRE is a system library on the majority of modern systems.
2414 See entry on PCRE_LIBS in EDITME file.
2416 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2417 conversation. Added nologin parameter to request.
2418 Patch contributed by Kirill Miazine.
2420 TF/01 Do not log submission mode rewrites if they do not change the address.
2422 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2424 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2425 log files in place. Contributed by Roberto Lima.
2427 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2429 TF/03 Bugzilla 615: When checking the local_parts router precondition
2430 after a local_part_suffix or local_part_prefix option, Exim now
2431 does not use the address's named list lookup cache, since this
2432 contains cached lookups for the whole local part.
2434 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2435 Robert Millan. Documentation is in experimental-spec.txt.
2437 TF/04 Bugzilla 668: Fix parallel build (make -j).
2439 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2441 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2442 Patch provided by Jan Srzednicki.
2444 TF/05 Leading white space used to be stripped from $spam_report which
2445 wrecked the formatting. Now it is preserved.
2447 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2448 that they are available at delivery time.
2450 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2452 TF/08 TLS error reporting now respects the incoming_interface and
2453 incoming_port log selectors.
2455 TF/09 Produce a more useful error message if an SMTP transport's hosts
2456 setting expands to an empty string.
2458 NM/06 Bugzilla 744: EXPN did not work under TLS.
2459 Patch provided by Phil Pennock.
2461 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2462 Patch provided by Richard Godbee.
2464 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2465 acl_smtp_notquit, added index entry.
2467 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2468 Patch provided by Eugene Bujak.
2470 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2471 accept(). Patch provided by Maxim Dounin.
2473 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2474 Patch provided by Phil Pennock.
2476 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2478 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2479 Patch provided by Brad "anomie" Jorsch.
2481 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2482 Patch provided by Dean Brooks.
2484 TK/05 Add native DKIM support (does not depend on external libraries).
2486 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2487 Patch provided by Graeme Fowler.
2489 NM/16 Bugzilla 851: Documentation example syntax fix.
2491 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2493 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2496 NM/19 Bugzilla 745: TLS version reporting.
2497 Patch provided by Phil Pennock.
2499 NM/20 Bugzilla 167: bool: condition support.
2500 Patch provided by Phil Pennock.
2502 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2503 clients. Patch provided by Phil Pennock.
2505 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2506 Patch provided by Brad "anomie" Jorsch.
2508 NM/23 Bugzilla 687: Fix misparses in eximstats.
2509 Patch provided by Heiko Schlittermann.
2511 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2512 Patch provided by Heiko Schlittermann.
2514 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2515 plus update to original patch.
2517 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2519 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2520 Patch provided by David Brownlee.
2522 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2524 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2526 NM/30 Bugzilla 888: TLS documentation bugfixes.
2528 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2530 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2531 Unlike the original bugzilla I have changed all shell scripts in src tree.
2533 NM/33 Bugzilla 898: Transport filter timeout fix.
2534 Patch by Todd Rinaldo.
2536 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2537 Patch by Serge Demonchaux.
2539 NM/35 Bugzilla 39: Base64 decode bug fixes.
2540 Patch by Jakob Hirsch.
2542 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2544 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2546 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2548 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2554 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2555 ALT-N's libdkim that I have put here:
2556 http://duncanthrax.net/exim-experimental/
2558 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2559 were called 'true' and it seems that C99 defines that as a reserved
2560 keyword to be used with 'bool' variable types. That means you could
2561 not include C99-style headers which use bools without triggering
2562 build errors in sieve.c.
2564 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2565 as mailq or other aliases. Changed the --help handling significantly
2566 to do whats expected. exim_usage() emits usage/help information.
2568 SC/01 Added the -bylocaldomain option to eximstats.
2570 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2572 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2574 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2580 PH/01 Another patch from the Sieve maintainer.
2582 PH/02 When an IPv6 address is converted to a string for single-key lookup
2583 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2584 dots are used instead of colons so that keys in lsearch files need not
2585 contain colons. This was done some time before quoting was made available
2586 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2587 (notated using the quote facility) so as to distinguish them from IPv4
2588 keys. This meant that lookups for IP addresses in host lists did not work
2589 for iplsearch lookups.
2591 This has been fixed by arranging for IPv6 addresses to be expressed with
2592 colons if the lookup type is iplsearch. This is not incompatible, because
2593 previously such lookups could never work.
2595 The situation is now rather anomalous, since one *can* have colons in
2596 ordinary lsearch keys. However, making the change in all cases is
2597 incompatible and would probably break a number of configurations.
2599 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2602 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2603 conversion specification without a maximum field width, thereby enabling
2604 a rogue spamd server to cause a buffer overflow. While nobody in their
2605 right mind would setup Exim to query an untrusted spamd server, an
2606 attacker that gains access to a server running spamd could potentially
2607 exploit this vulnerability to run arbitrary code as the Exim user.
2609 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2610 $primary_hostname instead of what libspf2 thinks the hosts name is.
2612 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2613 a directory entry by the name of the lookup key. Previously, if a
2614 symlink pointed to a non-existing file or a file in a directory that
2615 Exim lacked permissions to read, a lookup for a key matching that
2616 symlink would fail. Now it is enough that a matching directory entry
2617 exists, symlink or not. (Bugzilla 503.)
2619 PH/03 The body_linecount and body_zerocount variables are now exported in the
2622 PH/04 Added the $dnslist_matched variable.
2624 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2625 This means they are set thereafter only if the connection becomes
2628 PH/06 Added the client_condition to authenticators so that some can be skipped
2629 by clients under certain conditions.
2631 PH/07 The error message for a badly-placed control=no_multiline_responses left
2632 "_responses" off the end of the name.
2634 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2636 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2637 (without spaces) instead of just copying the configuration text.
2639 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2641 PH/11 Added $max_received_linelength.
2643 PH/12 Added +ignore_defer and +include_defer to host lists.
2645 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2646 way in which PCRE > 7.0 is built.
2648 PH/14 Implemented queue_only_load_latch.
2650 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2651 MAIL command. The effect was to mangle the value on 64-bit systems.
2653 PH/16 Another patch from the Sieve maintainer.
2655 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2657 PH/18 If a system quota error occurred while trying to create the file for
2658 a maildir delivery, the message "Mailbox is full" was not appended to the
2659 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2660 only to a quota excession during the actual writing of the file.
2662 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2663 characters?) which causes problems in log lines. The DN values are now
2664 passed through string_printing() before being added to log lines.
2666 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2667 and InterBase are left for another time.)
2669 PH/21 Added message_body_newlines option.
2671 PH/22 Guard against possible overflow in moan_check_errorcopy().
2673 PH/23 POSIX allows open() to be a macro; guard against that.
2675 PH/24 If the recipient of an error message contained an @ in the local part
2676 (suitably quoted, of course), incorrect values were put in $domain and
2677 $local_part during the evaluation of errors_copy.
2683 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2684 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2687 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2688 issue a MAIL command.
2690 PH/02 In an ACL statement such as
2692 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2694 if a client was not listed at all, or was listed with a value other than
2695 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2696 the condition was not true (as it should be), so access was not denied.
2697 The bug was that the ! inversion was incorrectly passed on to the second
2698 item. This has been fixed.
2700 PH/03 Added additional dnslists conditions == and =& which are different from
2701 = and & when the dns lookup returns more than one IP address.
2703 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2704 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2706 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2707 FSYNC, which compiles an option called disable_fsync that allows for
2708 bypassing fsync(). The documentation is heavily laced with warnings.
2710 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2712 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2713 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2714 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2715 including adding "make clean"; (3) Added -fPIC when compiling the test
2716 dynamically loaded module, to get rid of a warning.
2718 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2719 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2720 = 0s. The bug is otherwise harmless.
2722 PH/07 There was a bug in the dovecot authenticator such that the value of
2723 $auth1 could be overwritten, and so not correctly preserved, after a
2724 successful authentication. This usually meant that the value preserved by
2725 the server_setid option was incorrect.
2727 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2729 PH/09 Installed PCRE release 7.0.
2731 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2732 run for batched SMTP input. It is now run at the start of every message
2733 in the batch. While fixing this I discovered that the process information
2734 (output by running exiwhat) was not always getting set for -bs and -bS
2735 input. This is fixed, and it now also says "batched" for BSMTP.
2737 PH/11 Added control=no_pipelining.
2739 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2740 patch, slightly modified), and move the expansion of helo_data till after
2741 the connection is made in the smtp transport (so it can use these
2744 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2746 PH/14 Added log_selector = +pid.
2748 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2750 PH/16 Add ${if forany and ${if forall.
2752 PH/17 Added dsn_from option to vary the From: line in DSNs.
2754 PH/18 Flush SMTP output before performing a callout, unless control =
2755 no_callout_flush is set.
2757 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2758 was true (the default) a successful delivery failed to delete the retry
2759 item, thus causing premature timeout of the address. The bug is now
2762 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2764 PH/21 Long custom messages for fakedefer and fakereject are now split up
2765 into multiline responses in the same way that messages for "deny" and
2766 other ACL rejections are.
2768 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2769 with slight modification.
2771 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2772 draft, changing the syntax and factoring some duplicate code".
2774 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2775 for deliveries of the second and subsequent messages over the same SMTP
2778 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2779 ${reduce, with only minor "tidies".
2781 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2783 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2784 expansion side effects.
2786 PH/27 When a message times out after an over-quota error from an Exim-imposed
2787 quota, the bounce message says "mailbox is full". This message was not
2788 being given when it was a system quota that was exceeded. It now should
2791 MH/03 Made $recipients available in local_scan(). local_scan() already has
2792 better access to the recipient list through recipients_list[], but
2793 $recipients can be useful in postmaster-provided expansion strings.
2795 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2796 in the case of a MAIL command with additional options following the
2797 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2798 were accidentally chopped off.
2800 PH/29 SMTP synchronization checks are implemented when a command is read -
2801 there is a check that no more input is waiting when there shouldn't be
2802 any. However, for some commands, a delay in an ACL can mean that it is
2803 some time before the response is written. In this time, more input might
2804 arrive, invalidly. So now there are extra checks after an ACL has run for
2805 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2806 pipelining has not been advertised.
2808 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2810 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2811 returned in the SMTP response when smtp_return_error_details was false.
2812 This has been fixed.
2814 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2815 instead of the C I/O that was originally supplied, because problems were
2816 reported on Solaris.
2818 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2819 Exim which did not show up earlier: it was assuming that a call to
2820 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2821 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2822 was a macro that became an assignment, so it seemed to work. This has
2823 changed to a proper function call with a void return, hence the compile
2824 error. Exim's code has been fixed.
2826 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2829 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2831 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2833 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2834 because it turns out to be too big or there is a timeout) there is no
2835 "Completed" line in the log. When some messages of this type were
2836 selected by exigrep, they were listed as "not completed". Others were
2837 picked up by some special patterns. I have improved the selection
2838 criteria to be more general.
2840 PH/38 The host_find_failed option in the manualroute router can now be set
2841 to "ignore", to completely ignore a host whose IP address cannot be
2842 found. If all hosts are ignored, the behaviour is controlled by the new
2843 host_all_ignored option.
2845 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2846 homing or because of multiple MX records with /mx) generated more than
2847 one IP address, and the following item turned out to be the local host,
2848 all the secondary addresses of the first item were incorrectly removed
2849 from the list, along with the local host and any following hosts (which
2850 is what is supposed to happen).
2852 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2853 whoever called Exim into the -H file. In the case of the daemon it was
2854 behaving confusingly. When first started, it used values for whoever
2855 started the daemon, but after a SIGHUP it used the Exim user (because it
2856 calls itself on a restart). I have changed the code so that it now always
2859 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2860 message are rejected with the same error (e.g. no authentication or bad
2861 sender address), and a DATA command is nevertheless sent (as can happen
2862 with PIPELINING or a stupid MUA), the error message that was given to the
2863 RCPT commands is included in the rejection of the DATA command. This is
2864 intended to be helpful for MUAs that show only the final error to their
2867 PH/42 Another patch from the Sieve maintainer.
2869 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2870 Eximstats - Fixed some broken HTML links and added missing column headers
2872 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2873 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2875 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2877 PH/43 Yet another patch from the Sieve maintainer.
2879 PH/44 I found a way to check for a TCP/IP connection going away before sending
2880 the response to the final '.' that terminates a message, but only in the
2881 case where the client has not sent further data following the '.'
2882 (unfortunately, this is allowed). However, in many cases there won't be
2883 any further data because there won't be any more messages to send. A call
2884 to select() can be used: if it shows that the input is "ready", there is
2885 either input waiting, or the socket has been closed. An attempt to read
2886 the next input character can distinguish the two cases. Previously, Exim
2887 would have sent an OK response which the client would never have see.
2888 This could lead to message repetition. This fix should cure that, at
2889 least in a lot of common cases.
2891 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2892 advertised in response to EHLO.
2898 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2899 fixed by 4.65/MH/01 (is this a record?) are fixed:
2901 (i) An empty string was always treated as zero by the numeric comparison
2902 operators. This behaviour has been restored.
2904 (ii) It is documented that the numeric comparison operators always treat
2905 their arguments as decimal numbers. This was broken in that numbers
2906 starting with 0 were being interpreted as octal.
2908 While fixing these problems I realized that there was another issue that
2909 hadn't been noticed. Values of message_size_limit (both the global option
2910 and the transport option) were treated as octal if they started with 0.
2911 The documentation was vague. These values are now always treated as
2912 decimal, and I will make that clear in the documentation.
2918 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2919 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2922 MH/01 Don't check that the operands of numeric comparison operators are
2923 integers when their expansion is in "skipping" mode (fixes bug
2924 introduced by 4.64-PH/07).
2926 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2927 child addresses, Exim now panics and dies. Previously, because the count
2928 is held in a short int, deliveries were likely to be lost. As such a
2929 large number of recipients for a single message is ridiculous
2930 (performance will be very, very poor), I have chosen to impose a limit
2931 rather than extend the field.
2937 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2938 leftover -K file (the existence of which was triggered by #402).
2939 While we were at it, introduced process PID as part of the -K
2940 filename. This should rule out race conditions when creating
2943 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2944 processing considerably. Previous code took too long for large mails,
2945 triggering a timeout which in turn triggers #401.
2947 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2948 in the DK code in transports.c. sendfile() is not really portable,
2949 hence the _LINUX specificness.
2951 TF/01 In the add_headers option to the mail command in an Exim filter,
2952 there was a bug that Exim would claim a syntax error in any
2953 header after the first one which had an odd number of characters
2956 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2957 callout verification, Exim cached a "reject" for the entire domain. This
2958 is correct for most verifications, but it is not correct for a recipient
2959 verification with use_sender or use_postmaster set, because in that case
2960 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2961 case of MAIL FROM:<> rejection from other early rejections (e.g.
2962 rejection of HELO). When verifying a recipient using a non-null MAIL
2963 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2964 Whatever the result of the callout, the value of the domain cache is
2965 left unchanged (for any other kind of callout, getting as far as trying
2966 RCPT means that the domain itself is ok).
2968 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2971 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2972 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2973 session, the daemon ignores ECONNECT errors and logs others; it now
2974 ignores EPIPE as well.
2976 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2977 (quoted-printable decoding).
2979 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2980 later the small subsequent patch to fix an introduced bug.
2982 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2984 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2986 PH/08 An error is now given if message_size_limit is specified negative.
2988 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2989 to be given (somewhat) arbitrary names.
2991 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2994 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2995 miscellaneous code fixes
2997 PH/10 Added the log_reject_target ACL modifier to specify where to log
3000 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3001 hostname. This is wrong, because it relates to the incoming message (and
3002 probably the interface on which it is arriving) and not to the outgoing
3003 callout (which could be using a different interface). This has been
3004 changed to use the value of the helo_data option from the smtp transport
3005 instead - this is what is used when a message is actually being sent. If
3006 there is no remote transport (possible with a router that sets up host
3007 addresses), $smtp_active_hostname is used.
3009 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3010 tweaks were necessary in order to get it to work (see also 21 below):
3011 (a) The code assumed that strncpy() returns a negative number on buffer
3012 overflow, which isn't the case. Replaced with Exim's string_format()
3014 (b) There were several signed/unsigned issues. I just did the minimum
3015 hacking in of casts. There is scope for a larger refactoring.
3016 (c) The code used strcasecmp() which is not a standard C function.
3017 Replaced with Exim's strcmpic() function.
3018 (d) The code set only $1; it now sets $auth1 as well.
3019 (e) A simple test gave the error "authentication client didn't specify
3020 service in request". It would seem that Dovecot has changed its
3021 interface. Fortunately there's a specification; I followed it and
3022 changed what the client sends and it appears to be working now.
3024 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3027 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3028 address A is aliased to B and C, where B exists and C does not. Without
3029 -v the output is "A verified" because verification stops after a
3030 successful redirection if more than one address is generated. However,
3031 with -v the child addresses are also verified. Exim was outputting "A
3032 failed to verify" and then showing the successful verification for C,
3033 with its parentage. It now outputs "B failed to verify", showing B's
3034 parentage before showing the successful verification of C.
3036 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3037 look up a TXT record in a specific list after matching in a combined
3040 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3041 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3042 they consult the DNS. I had assumed they would set it the way they
3043 wanted; and indeed my experiments on Linux seem to show that in some
3044 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3045 To be on the safe side, however, I have now made the interface to
3046 host_find_byname() similar to host_find_bydns(), with an argument
3047 containing the DNS resolver options. The host_find_byname() function now
3048 sets these options at its start, just as host_find_bydns() does. The smtp
3049 transport options dns_qualify_single and dns_search_parents are passed to
3050 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3051 of host_find_byname() use the default settings of RES_DEFNAMES
3052 (qualify_single) but not RES_DNSRCH (search_parents).
3054 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3055 spool_read_header() do less string testing, by means of a preliminary
3056 switch on the second character of optional "-foo" lines. (This is
3057 overdue, caused by the large number of possibilities that now exist.
3058 Originally there were few.) While I was there, I also converted the
3059 str(n)cmp tests so they don't re-test the leading "-" and the first
3060 character, in the hope this might squeeze out yet more improvement.
3062 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3063 flag allowing group syntax was set by the header_syntax check but not
3064 turned off, possible causing trouble later; (2) The flag was not being
3065 set at all for the header_verify test, causing "group"-style headers to
3066 be rejected. I have now set it in this case, and also caused header_
3067 verify to ignore an empty address taken from a group. While doing this, I
3068 came across some other cases where the code for allowing group syntax
3069 while scanning a header line wasn't quite right (mostly, not resetting
3070 the flag correctly in the right place). These bugs could have caused
3071 trouble for malformed header lines. I hope it is now all correct.
3073 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3074 with the "reply" argument non-NULL. The code, however (which originally
3075 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3076 but it didn't always do it. This confused somebody who was copying the
3077 code for some other use. I have removed all the tests.
3079 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3080 feature that was used to support insecure browsers during the U.S. crypto
3081 embargo. It requires special client support, and Exim is probably the
3082 only MTA that supported it -- and would never use it because real RSA is
3083 always available. This code has been removed, because it had the bad
3084 effect of slowing Exim down by computing (never used) parameters for the
3085 RSA_EXPORT functionality.
3087 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3088 authenticator to fail if there's a tab character in the incoming data
3089 (there should never be unless someone is messing about, as it's supposed
3090 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3091 if the connection is using TLS or if the remote IP is the same as the
3092 local IP, and the "valid-client-cert option" if a client certificate has
3095 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3096 authenticators. This can be used for authorization after authentication
3097 succeeds. (In the case of plaintext, it servers for both authentication
3100 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3101 if any retry times were supplied.
3103 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3104 connection, where there is no client IP address to check. In this
3105 situation, the verify now always succeeds.
3107 PH/25 Applied John Jetmore's -Mset patch.
3109 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3111 PH/27 In a string expansion for a processed (not raw) header when multiple
3112 headers of the same name were present, leading whitespace was being
3113 removed from all of them, but trailing whitespace was being removed only
3114 from the last one. Now trailing whitespace is removed from each header
3115 before concatenation. Completely empty headers in a concatenation (as
3116 before) are ignored.
3118 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3119 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3121 PH/29 [Removed. This was a change that I later backed out, and forgot to
3122 correct the ChangeLog entry (that I had efficiently created) before
3123 committing the later change.]
3125 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3126 address errors (4xx response to RCPT) over the same connection as other
3127 messages routed to the same hosts. Such deliveries are always "forced",
3128 so retry times are not inspected. This resulted in far too many retries
3129 for the affected addresses. The effect occurred only when there were more
3130 hosts than the hosts_max_try setting in the smtp transport when it had
3131 the 4xx errors. Those hosts that it had tried were not added to the list
3132 of hosts for which the message was waiting, so if all were tried, there
3133 was no problem. Two fixes have been applied:
3135 (i) If there are any address or message errors in an SMTP delivery, none
3136 of the hosts (tried or untried) are now added to the list of hosts
3137 for which the message is waiting, so the message should not be a
3138 candidate for sending over the same connection that was used for a
3139 successful delivery of some other message. This seems entirely
3140 reasonable: after all the message is NOT "waiting for some host".
3141 This is so "obvious" that I'm not sure why it wasn't done
3142 previously. Hope I haven't missed anything, but it can't do any
3143 harm, as the worst effect is to miss an optimization.
3145 (ii) If, despite (i), such a delivery is accidentally attempted, the
3146 routing retry time is respected, so at least it doesn't keep
3147 hammering the server.
3149 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3150 in ${readsocket because some servers need this prod.
3152 PH/32 Added some extra debug output when updating a wait-xxx database.
3154 PH/33 The hint "could be header name not terminated by colon", which has been
3155 given for certain expansion errors for a long time, was not being given
3156 for the ${if def:h_colon_omitted{... case.
3158 PH/34 The spec says: "With one important exception, whenever a domain list is
3159 being scanned, $domain contains the subject domain." There was at least
3160 one case where this was not true.
3162 PH/35 The error "getsockname() failed: connection reset by peer" was being
3163 written to the panic log as well as the main log, but it isn't really
3164 panic-worthy as it just means the connection died rather early on. I have
3165 removed the panic log writing for the ECONNRESET error when getsockname()
3168 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3169 runs only) independently of the message's sender address. This meant
3170 that, if the 4xx error was in fact related to the sender, a different
3171 message to the same recipient with a different sender could confuse
3172 things. In particular, this can happen when sending to a greylisting
3173 server, but other circumstances could also provoke similar problems.
3174 I have changed the default so that the retry time for these errors is now
3175 based a combination of the sender and recipient addresses. This change
3176 can be overridden by setting address_retry_include_sender=false in the
3179 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3180 remote server are returned as part of bounce messages. This was not
3181 happening for LMTP over a pipe (the lmtp transport), but now it is the
3182 same for both kinds of LMTP.
3184 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3185 in header lines that were in fact CNAMEs. This is no longer the case.
3187 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3188 and queue runs started by the daemon processed all messages. This has
3189 been fixed so that -R and -S can now usefully be given with -q<time>.
3191 PH/40 Import PCRE release 6.7 (fixes some bugs).
3193 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3195 PH/42 Give an error if -q is specified more than once.
3197 PH/43 Renamed the variables $interface_address and $interface_port as
3198 $received_ip_address and $received_port, to make it clear that these
3199 values apply to message reception, and not to the outgoing interface when
3200 a message is delivered. (The old names remain recognized, of course.)
3202 PH/44 There was no timeout on the connect() call when using a Unix domain
3203 socket in the ${readsocket expansion. There now is.
3205 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3206 be meaningful with "accept".
3208 SC/01 Eximstats V1.43
3209 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3211 SC/02 Eximstats V1.44
3212 Use a glob alias rather than an array ref in the generated
3213 parser. This improves both readability and performance.
3215 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3216 Collect SpamAssassin and rejection statistics.
3217 Don't display local sender or destination tables unless
3218 there is data to show.
3219 Added average volumes into the top table text output.
3221 SC/04 Eximstats V1.46
3222 Collect data on the number of addresses (recipients)
3223 as well as the number of messages.
3225 SC/05 Eximstats V1.47
3226 Added 'Message too big' to the list of mail rejection
3227 reasons (thanks to Marco Gaiarin).
3229 SC/06 Eximstats V1.48
3230 Mainlog lines which have GMT offsets and are too short to
3231 have a flag are now skipped.
3233 SC/07 Eximstats V1.49 (Alain Williams)
3234 Added the -emptyok flag.
3236 SC/08 Eximstats V1.50
3237 Fixes for obtaining the IP address from reject messages.
3239 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3240 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3241 whitespace changes from 4.64-PH/27
3243 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3246 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3247 are found, allow negative numbers in numeric criteria)
3249 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3251 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3252 to match changes made in 4.64-PH/43
3254 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3256 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3257 "domain" is actually an IP address, and force a failure. This locks out
3258 those revolvers/nameservers that support "A-for-A" lookups, in
3259 contravention of the specifications.
3261 PH/48 When a host name was looked up from an IP address, and the subsequent
3262 forward lookup of the name timed out, the host name was left in
3263 $sender_host_name, contrary to the specification.
3265 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3266 restricted to single-key lookups, Exim was not diagnosing an error if
3267 * or *@ was used with a query-style lookup.
3269 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3271 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3272 long ago, but noone interested enough thought of it. Let's just say that
3273 the "1.1" means that there are some new functions that weren't there at
3274 some point in the past.
3276 PH/51 Error processing for expansion failure of helo_data from an smtp
3277 transport during callout processing was broken.
3279 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3280 tested/used via the -bh/-bhc/-bs options.
3282 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3283 bug, fixed in subsequent PCRE releases).
3285 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3286 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3288 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3294 SC/01 Use a glob alias rather than an array ref in eximstats generated
3295 parser. This improves both readability and performance.
3297 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3298 Don't display local sender or destination tables in eximstats unless
3299 there is data to show.
3300 Added average volumes into the eximstats top table text output.
3302 SC/03 Collect data on the number of addresses (recipients) as well
3303 as the number of messages in eximstats.
3305 TF/01 Correct an error in the documentation for the redirect router. Exim
3306 does (usually) call initgroups() when daemonizing.
3308 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3309 with consistent privilege compared to when running as a daemon.
3311 TF/03 Note in the spec that $authenticated_id is not set for local
3312 submissions from trusted users.
3314 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3315 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3317 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3318 by adding some example configuration directives to the default
3319 configuration file. A little bit of work is required to uncomment the
3320 directives and define how usernames and passwords are checked, but
3321 there is now a framework to start from.
3323 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3324 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3325 without this. I don't know how relevant this is to other LDAP libraries.
3327 PH/02 Add the verb name to the "unknown ACL verb" error.
3329 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3331 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3333 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3334 directory not expanded when it should be if an expanded home directory
3335 was set for the address (which is overridden by the transport).
3337 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3340 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3341 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3342 because it is too late at that time, and has no effect.
3344 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3345 security issue with \' (bugzilla #107). I could not use the
3346 PQescapeStringConn() function, because it needs a PGconn value as one of
3349 PH/08 When testing addresses using -bt, indicate those final addresses that
3350 are duplicates that would not cause an additional delivery. At least one
3351 person was confused, thinking that -bt output corresponded to deliveries.
3352 (Suppressing duplicates isn't a good idea as you lose the information
3353 about possibly different redirections that led to the duplicates.)
3355 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3356 systems where poll() doesn't work, in particular OS X.
3358 PH/10 Added more information to debugging output for retry time not reached.
3360 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3361 operations in malware.c.
3363 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3366 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3367 syslog_duplication set false, log lines that would normally be written
3368 both the the main log and to the reject log were not written to syslog at
3371 PH/14 In the default configuration, change the use of "message" in ACL warn
3372 statements to "add_header".
3374 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3375 not followed by a command (e.g. "seen endif").
3377 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3378 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3381 PH/17 Added extra conditions to the default value of delay_warning_condition
3385 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3386 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3387 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3390 The Auto-Submitted: and various List- headers are standardised, whereas I
3391 don't think Precedence: ever was.
3393 PH/18 Refactored debugging code in route_finduser() to show more information,
3394 in particular, the error code if getpwnam() issues one.
3396 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3397 This is apparently needed in addition to the PH/07 change above to avoid
3398 any possible encoding problems.
3400 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3401 but not after initializing Perl.
3403 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3404 output them only if debugging. By default they are written stderr,
3405 apparently, which is not desirable.
3407 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3410 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3413 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3415 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3416 authenticated or an ident call has been made. Suppress the default
3417 values for $authenticated_id and $authenticated_sender (but permit -oMai
3418 and -oMas) when testing with -bh.
3420 PH/24 Re-jigged the order of the tests in the default configuration so that the
3421 tests for valid domains and recipients precede the DNS black list and CSA
3422 tests, on the grounds that those ones are more expensive.
3424 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3425 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3426 This bug exists in every version of Exim that I still have, right back to
3429 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3430 However, an attempt to turn on case-sensitivity in a regex key by
3431 including (?-i) didn't work because the subject string was already
3432 lowercased, and the effects were non-intuitive. It turns out that a
3433 one-line patch can be used to allow (?-i) to work as expected.
3439 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3440 other effects) broke the use of negated acl sub-conditions.
3442 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3445 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3446 "Deny" causes Exim to reject the incoming connection with a 554 error.
3447 Unfortunately, if there is a major crisis, such as a disk failure,
3448 tcp-wrappers gives "deny", whereas what one would like would be some
3449 kind of temporary error. A kludge has been added to help with this.
3450 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3451 554 error is used if errno is still zero or contains ENOENT (which occurs
3452 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3455 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3457 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3458 errors. Otherwise a message that provokes a temporary error (when other
3459 messages do not) can cause a whole host to time out.
3461 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3462 addresses were routed directly to files or pipes from a redirect router.
3463 File deliveries just didn't batch; pipe deliveries might have suffered
3466 PH/06 A failure to get a lock for a hints database would erroneously always say
3467 "Failed to get write lock", even when it was really a read lock.
3469 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3470 of 0600. This has been changed to use the value of the lockfile_mode
3471 option (which defaults to 0600).
3473 PH/08 Applied small patch from the Sieve maintainer.
3475 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3476 folder from quota calculations, a direct delivery into this folder messed
3477 up the contents of the maildirsize file. This was because the regex was
3478 used only to exclude .Trash (or whatever) when the size of the mailbox
3479 was calculated. There was no check that a delivery was happening into an
3480 excluded directory. This bug has been fixed by ignoring all quota
3481 processing for deliveries into excluded directories.
3483 PH/10 Added the maildirfolder_create_regex option to appendfile.
3489 PH/01 The code for finding all the local interface addresses on a FreeBSD
3490 system running IPv6 was broken. This may well have applied to all BSD
3491 systems, as well as to others that have similar system calls. The broken
3492 code found IPv4 interfaces correctly, but gave incorrect values for the
3493 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3494 that it would not match correctly against @[] and not recognize the IPv6
3497 PH/02 The ipliteral router was not recognizing addresses of the form user@
3498 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3500 PH/03 Added disable_ipv6.
3502 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3503 decoded form, because it is most often used to construct To: headers
3504 lines in autoreplies, and the decoded form may well be syntactically
3505 invalid. However, $reply_address has leading white space removed, and all
3506 newlines turned into spaces so that the autoreply transport does not
3509 PH/05 If group was specified without a user on a router, and no group or user
3510 was specified on a transport, the group from the router was ignored.
3512 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3513 for visible compile-time settings that can be used to change these
3514 numbers, for those that want even more. Backwards compatibility with old
3515 spool files has been maintained. However, going back to a previous Exim
3516 release will lost any variables that are in spool files.
3518 PH/07 Two small changes when running in the test harness: increase delay when
3519 passing a TCP/IP connection to a new process, in case the original
3520 process has to generate a bounce, and remove special handling of
3521 127.0.0.2 (sic), which is no longer necessary.
3523 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3524 be the same on different OS.
3526 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3529 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3530 whether --show-vars was specified or not
3532 JJ/02 exipick: Added support for new ACL variable spool format introduced
3535 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3536 syntactically invalid From: or Reply-to: line, and a filter used this to
3537 generate an autoreply, and therefore failed to obtain an address for the
3538 autoreply, Exim could try to deliver to a non-existent relative file
3539 name, causing unrelated and misleading errors. What now happens is that
3540 it logs this as a hard delivery error, but does not attempt to create a
3543 PH/11 The exinext utility has a -C option for testing purposes, but although
3544 the given file was scanned by exinext itself; it wasn't being passed on
3545 when Exim was called.
3547 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3548 an end-of-file indication when reading a command response.
3550 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3551 compiled. In many other places in Exim, IPv6 addresses are always
3552 recognized, so I have changed this. It also means that IPv4 domain
3553 literals of the form [IPV4:n.n.n.n] are now always recognized.
3555 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3556 used if the router is not running as root, for example, when verifying at
3557 ACL time, or when using -bh. The debugging output from this situation was
3558 non-existent - all you got was a failure to exec. I have made two
3561 (a) Failures to set uid/gid, the current directory, or a process leader
3562 in a subprocess such as that created by queryprogram now generate
3563 suitable debugging output when -d is set.
3565 (b) The queryprogram router detects when it is not running as root,
3566 outputs suitable debugging information if -d is set, and then runs
3567 the subprocess without attempting to change uid/gid.
3569 PH/15 Minor change to Makefile for building test_host (undocumented testing
3572 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3573 additional section of a DNS packet that returns MX or SRV records.
3574 Instead, it always explicitly searches for A/AAAA records. This avoids
3575 major problems that occur when a DNS server includes only records of one
3576 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3577 fixed another bug: if SRV records were looked up and the corresponding
3578 address records were *not* found in the additional section, the port
3579 values from the SRV records were lost.
3581 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3582 using the correct key (the original address) when searching the retry
3583 rules in order to find which one to use for generating the retry hint.
3585 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3586 adding the default one. Similarly, if it contains a Reply-To: header, the
3587 errors_reply_to option, if set, is not used.
3589 PH/19 When calculating a retry time, Exim used to measure the "time since
3590 failure" by looking at the "first failed" field in the retry record. Now
3591 it does not use this if it is later than than the arrival time of the
3592 message. Instead it uses the arrival time. This makes for better
3593 behaviour in cases where some deliveries succeed, thus re-setting the
3594 "first failed" field. An example is a quota failure for a huge message
3595 when small messages continue to be delivered. Without this change, the
3596 "time since failure" will always be short, possible causing more frequent
3597 delivery attempts for the huge message than are intended.
3598 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3600 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3601 $1, $2, $3) because the numerical variables can be reset during some
3602 expansion items (e.g. "match"), thereby losing the authentication data.
3604 PH/21 Make -bV show the size of off_t variables so that the test suite can
3605 decide whether to run tests for quotas > 2G.
3607 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3608 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3609 filecount value is greater than 2G or if a quota value is greater than 2G
3610 on a system where the size of off_t is not greater than 4, a panic error
3613 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3614 never match. The debug and -bh output now contains an explicit error
3615 message indicating a malformed IPv4 address or mask.
3617 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3618 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3619 PH/23 above applies.
3621 PH/25 Do not write to syslog when running in the test harness. The only
3622 occasion when this arises is a failure to open the main or panic logs
3623 (for which there is an explicit test).
3625 PH/26 Added the /no_tell option to "control=freeze".
3627 PH/27 If a host name lookup failed very early in a connection, for example, if
3628 the IP address matched host_lookup and the reverse lookup yielded a name
3629 that did not have a forward lookup, an error message of the form "no IP
3630 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3631 could be logged. Now it outputs the IP address instead of "NULL".
3633 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3634 allows the sender and the authenticated sender to be set when
3635 submitting a message from within Exim. Since child_open_exim() is
3636 documented for local_scan(), the new function should be too.
3638 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3639 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3640 results in an empty string is now treated as unset.
3642 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3644 PH/31 Added sender_verify_fail logging option.
3646 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3647 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3648 tidied the source and removed it altogether.
3650 PH/33 When a queue run was abandoned because the load average was too high, a
3651 log line was always written; now it is written only if the queue_run log
3652 selector is set. In addition, the log line for abandonment now contains
3653 information about the queue run such as the pid. This is always present
3654 in "start" and "stop" lines but was omitted from the "abandon" line.
3656 PH/34 Omit spaces between a header name and the colon in the error message that
3657 is given when verify = headers_syntax fails (if there are lots of them,
3658 the message gets confusing).
3660 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3661 names, as there are now some PTR records that contain slashes. This check
3662 is only to protect against broken name servers that fall over on strange
3663 characters, so the fact that it applies to all lookups doesn't matter.
3665 PH/36 Now that the new test suite is complete, we can remove some of the
3666 special code in Exim that was needed for the old test suite. For example,
3667 sorting DNS records because real resolvers return them in an arbitrary
3668 order. The new test suite's fake resolver always returns records in the
3671 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3672 bounces) except when queue_only is set, to avoid logging races between
3673 the different processes.
3675 PH/38 Panic-die if .include specifies a non-absolute path.
3677 PH/39 A tweak to the "H" retry rule from its user.
3679 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3680 a label. They prevented compilation on older perls.
3682 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3683 a warning to be raised on newish perls.
3685 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3686 on queue. Changes to match documented behaviour of showing count of
3687 messages matching specified criteria.
3689 PH/40 Changed the default ident timeout from 30s to 5s.
3691 PH/41 Added support for the use of login_cap features, on those BSD systems
3692 that have them, for controlling the resources used by pipe deliveries.
3694 PH/42 The content-scanning code uses fopen() to create files in which to put
3695 message data. Previously it was not paying any attention to the mode of
3696 the files. Exim runs with umask(0) because the rest of the code creates
3697 files with open(), and sets the required mode explicitly. Thus, these
3698 files were ending up world-writeable. This was not a big issue, because,
3699 being within the spool directory, they were not world-accessible. I have
3700 created a function called modefopen, which takes an additional mode
3701 argument. It sets umask(777), creates the file, chmods it to the required
3702 mode, then resets the umask. All the relevant calls to fopen() in the
3703 content scanning code have been changed to use this function.
3705 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3706 to 24 hours. This avoids potential overflow problems when processing G
3707 and H retry rules. I suspect nobody ever tinkers with this value.
3709 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3711 PH/45 When the plaintext authenticator is running as a client, the server's
3712 challenges are checked to ensure they are valid base64 strings. By
3713 default, the authentication attempt is cancelled if an invalid string is
3714 received. Setting client_ignore_invalid_base64 true ignores these errors.
3715 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3716 they are received. Thus, the responses can be made to depend on the
3717 challenges. If an invalid string is ignored, an empty string is placed in
3720 PH/46 Messages that are created by the autoreply transport now contains a
3721 References: header, in accordance with RFCs 2822 and 3834.
3723 PH/47 Added authenticated_sender_force to the smtp transport.
3725 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3727 PH/49 Installed latest patch from the Sieve maintainer.
3729 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3730 was also set, the appendfile transport was unnecessarily scanning a
3731 directory of message files (e.g. for maildir delivery) to find the count
3732 of files (along with the size), even though it did not need this
3733 information. It now does the scan only if it needs to find either the
3734 size of the count of files.
3736 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3738 PH/52 Two bugs concerned with error handling when the smtp transport is
3741 (i) Exim was not creating retry information for temporary errors given
3742 for individual recipients after the DATA command when the smtp transport
3743 was used in LMTP mode. This meant that they could be retried too
3744 frequently, and not timed out correctly.
3746 (ii) Exim was setting the flag that allows error details to be returned
3747 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3748 recipients that were returned after the DATA command.
3750 PH/53 This is related to PH/52, but is more general: for any failing address,
3751 when detailed error information was permitted to be returned to the
3752 sender, but the error was temporary, then after the final timeout, only
3753 "retry timeout exceeded" was returned. Now it returns the full error as
3754 well as "retry timeout exceeded".
3756 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3757 do this, and (what is worse) MTAs that accept it.
3759 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3760 will now be deprecated.
3762 PH/56 New os.c-cygwin from the Cygwin maintainer.
3764 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3765 formats (previously only available in exim formats via -bpr, -bpru,
3766 and -bpra. Now also available in native and exiqgrep formats)
3768 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3769 with very large, slow to parse queues
3771 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3773 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3775 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3776 responses to authentication challenges, though it was showing the
3777 challenges; (ii) I've removed the CR characters from the debug output for
3780 PH/58 Allow for the insertion of a newline as well as a space when a string
3781 is turned into more than one encoded-word during RFC 2047 encoding. The
3782 Sieve code now uses this.
3784 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3785 data_4xx, lost_connection, tls_required.
3787 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3788 message was being sent as an SMTP response.
3790 PH/61 Add -l and -k options to exicyclog.
3792 PH/62 When verifying, if an address was redirected to one new address, so that
3793 verification continued, and the new address failed or deferred after
3794 having set something in $address_data, the value of $address_data was not
3795 passed back to the ACL. This was different to the case when no
3796 redirection occurred. The value is now passed back in both cases.
3798 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3799 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3800 use login_cap.h, so on its own it isn't the distinguishing feature. The
3801 new name refers directly to the setclassresources() function.
3803 PH/65 Added configuration files for NetBSD3.
3805 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3807 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3808 is preferred over IPv4.
3810 PH/68 The bounce_return_message and bounce_return_body options were not being
3811 honoured for bounces generated during the reception of non-SMTP messages.
3812 In particular, this applied to messages rejected by the ACL. This bug has
3813 been fixed. However, if bounce_return_message is true and bounce_return_
3814 body is false, the headers that are returned for a non-SMTP message
3815 include only those that have been read before the error was detected.
3816 (In the case of an ACL rejection, they have all been read.)
3818 PH/69 The HTML version of the specification is now built in a directory called
3819 spec_html instead of spec.html, because the latter looks like a path with
3820 a MIME-type, and this confuses some software.
3822 PH/70 Catch two compiler warnings in sieve.c.
3824 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3825 function verify_get_ident() calls ip_connect() to connect a socket, but
3826 if the "connect()" function timed out, ip_connect() used to close the
3827 socket. However, verify_get_ident() also closes the socket later, and in
3828 between Exim writes to the log, which may get opened at this point. When
3829 the socket was closed in ip_connect(), the log could get the same file
3830 descriptor number as the socket. This naturally causes chaos. The fix is
3831 not to close the socket in ip_connect(); the socket should be closed by
3832 the function that creates it. There was only one place in the code where
3833 this was missing, in the iplookup router, which I don't think anybody now
3834 uses, but I've fixed it anyway.
3836 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3837 well as to direct DNS lookups. Otherwise the handling of names in host
3838 lists is inconsistent and therefore confusing.
3844 PH/01 Two changes to the default runtime configuration:
3846 (1) Move the checks for relay_from_hosts and authenticated clients from
3847 after to before the (commented out) DNS black list checks.
3849 (2) Add control=submission to the relay_from_hosts and authenticated
3850 clients checks, on the grounds that messages accepted by these
3851 statements are most likely to be submissions.
3853 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3855 (1) Generate an error if the third argument for the ${prvs expansion is
3858 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3861 (3) Reset the variables that are obtained from the first argument of
3862 ${prvscheck and used in the second argument before leaving the code,
3863 because their memory is reclaimed, so using them afterwards may do
3866 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3867 one (it's much easier than Tom thought :-).
3869 (5) Because of (4), we can now allow for the use of $prvscheck_result
3870 inside the third argument.
3872 PH/03 For some reason, the default setting of PATH when running a command from
3873 a pipe transport was just "/usr/bin". I have changed it to
3876 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3877 anything to be listed in the output from -bV.
3879 PH/05 When a filter generated an autoreply, the entire To: header line was
3880 quoted in the delivery log line, like this:
3882 => >A.N.Other <ano@some.domain> <original@ddress> ...
3884 This has been changed so that it extracts the operative address. There
3885 may be more than one such address. If so, they are comma-separated, like
3888 => >ano@some.domain,ona@other.domain <original@ddress> ...
3890 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3891 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3892 not being looked up in the rDNS to get a host name, Exim was showing the
3893 IP address twice in Received: lines, even though the IP addresses were
3894 identical. For example:
3896 Received: from [1.2.3.4] (helo=[1.2.3.4])
3898 However, if the real host name was known, it was omitting the HELO data
3899 if it matched the actual IP address. This has been tidied up so that it
3900 doesn't show the same IP address twice.
3902 PH/07 When both +timestamp and +memory debugging was on, the value given by
3903 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3904 called by the debug printing, thereby overwriting the timestamp buffer.
3905 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3907 PH/08 When the original message was included in an autoreply transport, it
3908 always said "this is a copy of the message, including all the headers",
3909 even if body_only or headers_only was set. It now gives an appropriate
3912 PH/09 Applied a patch from the Sieve maintainer which:
3914 o fixes some comments
3915 o adds the (disabled) notify extension core
3916 o adds some debug output for the result of if/elsif tests
3917 o points to the current vacation draft in the documentation
3918 and documents the missing references header update
3922 o fixes a bug in processing the envelope test (when testing
3923 multiple envelope elements, the last element determined the
3926 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3927 Electronic Mail") by including:
3929 Auto-submitted: auto-generated
3931 in the messages that it generates (bounce messages and others, such as
3932 warnings). In the case of bounce messages for non-SMTP messages, there was
3933 also a typo: it was using "Auto_submitted" (underscore instead of
3934 hyphen). Since every message generated by Exim is necessarily in response
3935 to another message, thes have all been changed to:
3937 Auto-Submitted: auto-replied
3939 in accordance with these statements in the RFC:
3941 The auto-replied keyword:
3943 - SHOULD be used on messages sent in direct response to another
3944 message by an automatic process,
3946 - MUST NOT be used on manually-generated messages,
3948 - MAY be used on Delivery Status Notifications (DSNs) and Message
3949 Disposition Notifications (MDNs),
3951 - MUST NOT be used on messages generated by automatic or periodic
3952 processes, except for messages which are automatic responses to
3955 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3956 to the default Received: header definition.
3958 PH/12 Added log selector acl_warn_skipped (default on).
3960 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3961 variables because (a) they are in the wrong storage pool and (b) even if
3962 they were copied, it wouldn't work properly because of the caching.
3964 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3965 checking when decoding. Apparently there are clients that generate
3966 overlong encoded strings. Why am I not surprised?
3968 PH/15 If the first argument of "${if match_address" was not empty, but did not
3969 contain an "@" character, Exim crashed. Now it writes a panic log message
3970 and treats the condition as false.
3972 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3974 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3975 extension "envelope-auth". The code is finished and in agreement with
3976 other implementations, but there is no documentation so far and in fact,
3977 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3978 not changing the active code.
3980 Print executed "if" and "elsif" statements when debugging is used. This
3981 helps a great deal to understand what a filter does.
3983 Document more things not specified clearly in RFC3028. I had all this
3984 sorted out, when out of a sudden new issues came to my mind. Oops."
3986 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3989 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3990 canonical form (as documented). However, after a host name lookup from
3991 the IP address, check_host() was doing a simple string comparison with
3992 addresses acquired from the DNS when checking that the found name did
3993 have the original IP as one of its addresses. Since any found IPv6
3994 addresses are likely to be in abbreviated form, the comparison could
3995 fail. Luckily, there already exists a function for doing the comparison
3996 by converting both addresses to binary, so now that is used instead of
3997 the text comparison.
3999 PH/20 There was another similar case to PH/19, when a complete host name was
4000 given in a host list; looking up its IP address could give an abbreviated
4001 form, whereas the current host's name might or might not be abbreviated.
4002 The same fix has been applied.
4008 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4009 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4012 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4013 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4015 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4017 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4018 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4019 Also, for "Auto-Submitted", treat anything other than "no" as
4020 non-personal, in accordance with RFC 3834. (Previously it treated
4021 anything starting "auto-" as non-personal.)
4023 TF/01 The control=submission/name=... option had a problem with syntax
4024 errors if the name included a slash character. The /name= option
4025 now slurps the rest of the string, so it can include any characters
4026 but it must come last in the list of options (after /sender_retain
4029 PH/05 Some modifications to the interface to the fake nameserver for the new
4037 TK/01 Added the "success_on_redirect" address verification option. See
4038 NewStuff for rationale and an example.
4040 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4042 PH/02 Patch to exigrep to allow it to work on syslog lines.
4044 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4045 fread() to skip over the body file's header line, because in Cygwin the
4046 header line is locked and is inaccessible.
4048 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4049 co-exist for some time) to make it clear that it is the Exim ID that is
4050 referenced, not the Message-ID: header line.
4052 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4053 string_format() function, because snprintf() does not exist on all
4056 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4057 ${stat: expansion item.
4059 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4060 protocol synchronization error", to keep the pedants happy.
4062 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4063 well as for IRIX systems, when gcc is being used. See the host.c source
4066 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4068 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4071 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4072 transport and to the smtp transport in LMTP mode.
4074 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4076 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4077 run a filter in a subprocess. This could lead to confusion in subsequent
4078 lookups in the parent process. There should also be a search_tidyup() at
4079 the end of the subprocess.
4081 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4082 only if the host matched helo_try_verify_hosts, which caused the
4083 verification to occur when the EHLO/HELO command was issued. The ACL just
4084 tested the remembered result. Now, if a previous verification attempt has
4085 not happened, "verify = helo" does it there and then.
4087 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4089 TK/03 Fix log output including CR from clamd.
4091 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4092 exist provoked a memory error which could cause a segfault.
4094 PH/15 Installed PCRE 6.2
4096 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4098 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4099 of the problem. Specifically, suggested +O2 rather than +O1 for the
4102 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4104 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4105 record, the port was not correctly logged when the outgoing_port log
4106 selector was set (it logged the transort's default port).
4108 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4109 fallback_hosts, and "hosts" in the smtp transport.
4111 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4112 host errors such as "Connection refused".
4114 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4115 authentication with radiusclient 0.4.9:
4117 - Error returned from rc_read_config was caught wrongly
4118 - Username/password not passed on to radius server due to wrong length.
4120 The presumption is that some radiusclient API changes for 4.51/PH/17
4121 were not taken care of correctly. The code is still untested by me (my
4122 Linux distribution still has 0.3.2 of radiusclient), but it was
4123 contributed by a Radius user.
4125 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4126 expanding the "port" option of the smtp transport.
4128 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4129 while reading a MIME header. Thanks to Tom Hughes for a patch.
4131 PH/24 Include config.h inside local_scan.h so that configuration settings are
4134 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4135 that in an ACL for RCPT (for example), you can examine exactly what was
4138 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4139 commands, but it was not correctly comparing the address with the actual
4140 client host address. Thus, it would show the EHLO address in Received:
4141 header lines when this was not necessary.
4143 PH/27 Added the % operator to ${eval:}.
4145 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4146 it should be ignoring failures (because with -C, for example, it has lost
4147 privilege). It wasn't ignoring creation failures other than "already
4150 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4153 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4154 because an input line was too long, either on its own, or by virtue of
4155 too many continuations, the temporary file was not being removed, and the
4156 return code was incorrect.
4158 PH/31 Missing "BOOL" in function definition in filtertest.c.
4160 PH/32 Applied Sieve patches from the maintainer.
4162 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4164 PH/33 Added "verify = not_blind".
4166 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4167 Local/Makefile (with some defaults set). These are used in built scripts
4168 such as exicyclog, but they have never been used in the exim_install
4169 script (though there are many overriding facilities there). I have
4170 arranged that the exim_install script now takes note of these two
4173 PH/35 Installed configuration files for Dragonfly.
4175 PH/36 When a locally submitted message by a trusted user did not contain a
4176 From: header, and the sender address was obtained from -f or from an SMTP
4177 MAIL command, and the trusted user did not use -F to supply a sender
4178 name, $originator_name was incorrectly used when constructing a From:
4179 header. Furthermore, $originator_name was used for submission mode
4180 messages from external hosts without From: headers in a similar way,
4181 which is clearly wrong.
4183 PH/37 Added control=suppress_local_fixups.
4185 PH/38 When log_selector = +received_sender was set, and the addition of the
4186 sender made the log line's construction buffer exactly full, or one byte
4187 less than full, an overflow happened when the terminating "\n" was
4190 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4191 when the result of a list match is failure because a DNS lookup failed.
4193 PH/40 RM_COMMAND is now used in the building process.
4195 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4196 the "build-* directories that it finds.
4198 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4199 address in a domain literal was a prefix of an interface address.
4201 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4202 when verifying a sender address, unless rewrite_headers is false.
4204 PH/44 Wrote a long comment about why errors_to addresses are verified as
4205 recipients, not senders.
4207 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4208 the ratelimit ACL was added.
4210 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4212 PH/46 Added extra information about PostgreSQL errors to the error string.
4214 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4215 avoiding the need to install special zones in a real server. This is
4216 backwards compatible; if it can't find the fake resolver, it drops back.
4217 Thus, both old and new test suites can be run.
4219 TF/02 Added util/ratelimit.pl
4221 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4222 clock is set back in time.
4224 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4225 Candler <B.Candler@pobox.com>.
4227 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4228 OK for addresses that are the result of redirections.
4230 PH/48 A number of further additions for the benefit of the new test suite,
4231 including a fake gethostbyname() that interfaces to the fake DNS resolver
4234 TF/06 The fix for widen_domains has also been applied to qualify_single and
4235 search_parents which are the other dnslookup options that can cause
4238 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4241 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4243 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4244 service" if it encountered an MX record with an empty target hostname.
4245 The message is now "an MX or SRV record indicated no SMTP service".
4247 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4248 if the DNS of the sending site is misconfigured. This is quite a
4249 common situation. This change restores the behaviour of treating a
4250 helo verification defer as a failure.
4252 PH/51 If self=fail was set on a router, the bounce message did not include the
4253 actual error message.
4259 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4261 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4262 command itself ended in error, the underlying message about the transport
4263 filter timeout was being overwritten with the pipe command error. Now the
4264 underlying error message should be appended to the second error message.
4266 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4268 PH/02 Reduce the amount of output that "make" produces by default. Full output
4269 can still be requested.
4271 PH/03 The warning log line about a condition test deferring for a "warn" verb
4272 was being output only once per connection, rather than after each
4273 occurrence (because it was using the same function as for successful
4274 "warn" verbs). This seems wrong, so I have changed it.
4276 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4277 it should not have, which might have caused a crash in the right
4278 circumstances, but probably never did.
4280 PH/04 Installed a modified version of Tony Finch's patch to make submission
4281 mode fix the return path as well as the Sender: header line, and to
4282 add a /name= option so that you can make the user's friendly name appear
4285 TF/03 Added the control = fakedefer ACL modifier.
4287 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4288 Mark Lowes for thorough testing.
4290 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4292 TK/03 Merged latest SRS patch from Miles Wilton.
4294 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4295 with the definition in sysexits.h (which is #included earlier).
4296 Fortunately, Exim does not actually use EX_OK. The code used to try to
4297 preserve the sysexits.h value, by assuming that macro definitions were
4298 scanned for macro replacements. I have been disabused of this notion,
4299 so now the code just undefines EX_OK before #including unistd.h.
4301 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4302 in the smtp transport. When a block could not be written in a single
4303 write() function, the timeout was being re-applied to each part-write.
4304 This seems wrong - if the receiver was accepting one byte at a time it
4305 would take for ever. The timeout is now adjusted when this happens. It
4306 doesn't have to be particularly precise.
4308 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4309 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4311 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4312 without a domain if the check to <postmaster@domain> fails.
4314 SC/01 Eximstats: added -xls and the ability to specify output files
4315 (patch written by Frank Heydlauf).
4317 SC/02 Eximstats: use FileHandles for outputting results.
4319 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4321 SC/04 Eximstats: fixed display of large numbers with -nvr option
4323 SC/05 Eximstats: fixed merging of reports with empty tables.
4325 SC/06 Eximstats: added the -include_original_destination flag
4327 SC/07 Eximstats: removed tabs and trailing whitespace.
4329 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4331 TK/06 MBOX spool code: Add real "From " MBOX separator line
4332 so the .eml file is really in mbox format (even though
4333 most programs do not really care). Patch from Alex Miller.
4335 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4336 The latter is generated from $received_to and is only set if the
4337 message has one envelope recipient. SA can use these headers,
4338 obviously out-of-the-box. Patch from Alex Miller.
4340 PH/08 The ${def test on a variable was returning false if the variable's
4341 value was "0", contrary to what the specification has always said!
4342 The result should be true unless the variable is empty.
4344 PH/09 The syntax error of a character other than { following "${if
4345 def:variable_name" (after optional whitespace) was not being diagnosed.
4346 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4347 accidental colon was present, for example, could give incorrect results.
4349 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4350 result is used (not including appendfile, where other changes are about
4353 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4354 This involved changing a lot of size variables from int to off_t. It
4355 should work with maildirs and everything.
4357 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4358 spamd dying while we are connected to it.
4360 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4363 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4364 function for BDB 4.3.
4366 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4368 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4369 the sources for PCRE have been re-arranged and more files are now
4372 PH/15 The code I had for printing potentially long long variables in PH/11
4373 above was not the best (it lost precision). The length of off_t variables
4374 is now inspected at build time, and an appropriate printing format (%ld
4375 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4376 to be "long long int" or "long int". This is needed for the internal
4377 formatting function string_vformat().
4379 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4380 the configuration file to be ":syslog", then the script "guesses" where
4381 the logs files are, rather than using the compiled in default. In our
4382 case the guess is not the same as the compiled default, so the script
4383 suddenly stopped working when I started to use syslog. The patch checks
4384 to see if log_file_path is "". If so, it attempts to read it from exim
4385 with no configuration file to get the compiled in version, before it
4386 falls back to the previous guessing code."
4388 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4389 implementing BATV in an Exim configuration. See NewStuff for the gory
4392 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4393 Makefile that are specific to HP-UX.
4395 PH/18 If the "use_postmaster" option was set for a recipient callout together
4396 with the "random" option, the postmaster address was used as the MAIL
4397 FROM address for the random test, but not for the subsequent recipient
4398 test. It is now used for both.
4400 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4401 patch removes a few documentation additions to RFC 3028, because the
4402 latest draft now contains them. It adds the new en;ascii-case comparator
4403 and a new error check for 8bit text in MIME parts. Comparator and
4404 require names are now matched exactly. I enabled the subaddress
4405 extension, but it is not well tested yet (read: it works for me)."
4407 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4408 rework some of the code of TK/09 above to avoid the hardwired use of
4409 "%lld" and "long long". Replaced the call to snprintf() with a call to
4412 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4413 records point to non-existent hosts", "retry timeout exceeded", and
4414 "retry time not reached for any host after a long failure period".
4416 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4417 experimental DomainKeys support:
4419 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4420 (2) On an error such as an illegally used "control", the wrong name for
4421 the control was given.
4423 These problems did NOT occur unless DomainKeys support was compiled.
4425 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4427 PH/24 Added ${if match_ip condition.
4429 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4430 databases so that it will be absolutely obvious if a crash occurs in the
4431 DB library. This is a regular occurrence (often caused by mis-matched
4434 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4435 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4436 picked up on a user's system that detects such things. There doesn't seem
4437 to be a gcc warning option for this - only an attribute that has to be
4438 put on the function's prototype. It seems that in Fedora Core 4 they have
4439 set this on a number of new functions. No doubt there will be more in due
4442 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4443 specify a transport. However, if an address that was verified by such a
4444 router was the subject of a callout, Exim crashed because it tried to
4445 read the rcpt_include_affixes from the non-existent transport. Now it
4446 just assumes that the setting of that option is false. This bug was
4447 introduced by 4.51/PH/31.
4449 PH/28 Changed -d+all to exclude +memory, because that information is very
4450 rarely of interest, but it makes the output a lot bigger. People tend to
4451 do -d+all out of habit.
4453 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4454 code in os-type was giving problems when libc.so lives in lib64, like on
4457 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4458 aren't the modern standard, and it seems that some systems' include files
4459 don't always have them. Exim was already checking for some of the newer
4460 ones like T_AAAA, and defining it itself. I've added checks for all the
4461 record types that Exim uses.
4463 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4464 not automatically generating a new one, as it is supposed to. This
4465 prevented TLS from working. If the file did exist, but contained invalid
4466 data, a new version was generated, as expected. It was only the case of a
4467 non-existent file that was broken.
4469 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4470 with a change in libdomainkeys > 0.64.
4472 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4473 from DNS. If the selector record carries the flag, it now has
4474 precedence over the domain-wide flag.
4476 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4478 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4479 the use of a port name that isn't defined in /etc/services) occurred, the
4480 message was deferred as in a normal delivery, and thus remained on the
4481 spool, instead of being failed because of the mua_wrapper setting. This
4482 is now fixed, and I tidied up some of the mua_wrapper messages at the
4485 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4486 the messages in a hash of arrays rather than using individual hashes.
4487 This is a bit cleaner and results in dramatic memory savings, albeit
4488 at a slight CPU cost.
4490 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4491 as requested by Marc Sherman.
4493 SC/10 Eximstats: added histograms for user specified patterns as requested
4496 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4498 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4499 fopen() in the content-scanning modules that did not already have it.
4505 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4506 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4508 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4510 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4512 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4513 to test Sieve filters that use "vacation".
4515 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4516 that changes the way the GnuTLS parameters are stored in the cache file.
4517 The new format can be generated externally. For backward compatibility,
4518 if the data in the cache doesn't make sense, Exim assumes it has read an
4519 old-format file, and it generates new data and writes a new file. This
4520 means that you can't go back to an older release without removing the
4523 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4524 work if there are any delivery delays because "one_time" forces the
4525 parent to be marked "delivered", so its unseen clone is never tried
4526 again. For this reason, Exim now forbids the simultaneous setting of
4529 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4530 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4531 entry if you want to know the details. The fix, however, neglected to
4532 consider the case when local delivery batching is involved. The test for
4533 "previously delivered" was not happening when checking to see if an
4534 address could be batched with a previous (undelivered) one; under
4535 certain circumstances this could lead to multiple deliveries to the same
4538 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4539 in its include files, and this causes problems building Exim.
4541 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4542 header_syntax) but Exim was just ignoring anything given after a slash.
4543 In particular, this caused confusion with an attempt to use "verify =
4544 reverse_host_lookup/defer_ok". An error is now given when options are
4545 supplied for verify items that do not have them. (Maybe reverse_host_
4546 lookup should have a defer_ok option, but that's a different point.)
4548 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4549 defined by RFC 821) to 2048, because there were problems with some AUTH
4550 commands, and RFC 1869 says the size should be increased for extended
4551 SMTP commands that take arguments.
4553 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4556 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4557 "unknown" error; now it says that the functionality isn't in the binary.
4559 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4560 an address' error message when a string expansion fails (syntax or
4561 whatever). Otherwise the password may appear in the log. Following change
4562 PH/42 below, there is no longer a chance of it appearing in a bounce
4565 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4567 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4568 of its addresses was ever tried. (Bugzilla bug #2.)
4570 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4571 the result incorrectly in the debug output. (It correctly added a newline
4572 to what was transported.)
4574 TF/01 Added $received_time.
4576 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4577 commented out examples of how to interface to a virus scanner and to
4578 SpamAssassin. Also added commented examples of av_scanner and
4579 spamd_address settings.
4581 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4582 and controls are allowed in which ACLs. There were a couple of minor
4583 errors. Some of the entries in the conditions table (which is a table of
4584 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4585 negation of where the condition IS allowed.
4587 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4589 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4590 header file does not have a version number, so I've had to invent a new
4591 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4592 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4593 radiusclient), but it was contributed by a Radius user.
4595 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4596 files or directories, for OpenSSL.
4598 PH/19 When an Exim process that is running as root has to create an Exim log
4599 file, it does so in a subprocess that runs as exim:exim so as to get the
4600 ownership right at creation (otherwise, other Exim processes might see
4601 the file with the wrong ownership). There was no test for failure of this
4602 fork() call, which would lead to the process getting stuck as it waited
4603 for a non-existent subprocess. Forks do occasionally fail when resources
4604 run out. I reviewed all the other calls to fork(); they all seem to check
4607 PH/20 When checking for unexpected SMTP input at connect time (before writing
4608 the banner), Exim was not dealing correctly with a non-positive return
4609 from the read() function. If the client had disconnected by this time,
4610 the result was a log entry for a synchronization error with an empty
4611 string after "input=" when read() returned zero. If read() returned -1
4612 (an event I could not check), uninitialized data bytes were printed.
4613 There were reports of junk text (parts of files, etc) appearing after
4616 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4618 PH/22 Added support for macro redefinition, and (re)definition in between
4619 driver and ACL definitions.
4621 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4622 forgetting to use the resulting value; it was using the unexpanded value.
4624 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4625 hadn't been configured. The fix is from Juergen Kreileder, who
4626 understands it better than I do:
4628 "Here's what I see happening with three configured cyrus_sasl
4629 authenticators configured (plain, login, cram-md5):
4631 On startup auth_cyrus_sasl_init() gets called for each of these.
4632 This means three calls to sasl_listmech() without a specified mech_list.
4633 => SASL tests which mechs of all available mechs actually work
4634 => three warnings about OTP not working
4635 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4637 With the patch, sasl_listmech() also gets called three times. But now
4638 SASL's mech_list option is set to the server_mech specified in the the
4639 authenticator. Or in other words, the answer from sasl_listmech()
4640 gets limited to just the mech you're testing for (which is different
4642 => the return list contains just 'plain' or 'login', 'cram-md5' or
4643 nothing depending on the value of ob->server_mech.
4645 I've just tested the patch: Authentication still works fine,
4646 unavailable mechs specified in the exim configuration are still
4647 caught, and the auth.log warnings about OTP are gone."
4649 PH/25 When debugging is enabled, the contents of the command line are added
4650 to the debugging output, even when log_selector=+arguments is not
4653 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4654 answer is "GNU", and only if the return is "GNU/something" is the answer
4657 PH/27 $acl_verify_message is now set immediately after the failure of a
4658 verification in an ACL, and so is available in subsequent modifiers. In
4659 particular, the message can be preserved by coding like this:
4661 warn !verify = sender
4662 set acl_m0 = $acl_verify_message
4664 Previously, $acl_verify_message was set only while expanding "message"
4665 and "log_message" when a very denied access.
4667 PH/28 Modified OS/os.c-Linux with
4669 -#ifndef OS_LOAD_AVERAGE
4670 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4672 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4673 nomenclature these days.)
4675 PH/29 Installed patch from the Sieve maintainer that adds the options
4676 sieve_useraddress and sieve_subaddress to the redirect router.
4678 PH/30 In these circumstances:
4679 . Two addresses routed to the same list of hosts;
4680 . First host does not offer TLS;
4681 . First host accepts first address;
4682 . First host gives temporary error to second address;
4683 . Second host offers TLS and a TLS session is established;
4684 . Second host accepts second address.
4685 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4686 and peerdn, if requested) that were in fact used only for the second
4689 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4690 attention to any local part prefix or suffix that was matched by the
4691 router that accepted the address. It now behaves in the same way as it
4692 does for delivery: the affixes are removed from the local part unless
4693 rcpt_include_affixes is set on the transport.
4695 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4696 timeout during the DATA phase of an incoming message.
4698 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4699 applied a patch sanctioned by the Sieve maintainer.
4701 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4702 the uid or gid is negative. A case of a negative gid caused this to be
4703 noticed. The fix allows for either to be negative.
4705 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4706 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4709 PH/36 The change PH/12 above was broken. Fixed it.
4711 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4712 the grounds that routing the same address twice would always produce the
4713 same answer. This might have been true once, but it is certainly no
4714 longer true now. Routing a child address may depend on the previous
4715 routing that produced that child. Some complicated redirection strategies
4716 went wrong when messages had multiple recipients, and made Exim's
4717 behaviour dependent on the order in which the addresses were given.
4719 I have moved the duplicate checking until after the routing is complete.
4720 Exim scans the addresses that are assigned to local and remote
4721 transports, and removes any duplicates. This means that more work will be
4722 done, as duplicates will always all be routed, but duplicates are
4723 presumably rare, so I don't expect this is of any significance.
4725 For deliveries to pipes, files, and autoreplies, the duplicate checking
4726 still happens during the routing process, since they are not going to be
4729 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4730 It corrects a timeout issue with spamd. This is Ian's comment: "The
4731 background is that sometimes spamd either never reads data from a
4732 connection it has accepted, or it never writes response data. The exiscan
4733 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4734 blindly assumes that writes won't block so it may never time out."
4736 PH/39 Allow G after quota size as well as K and M.
4738 PH/40 The value set for $authenticated_id in an authenticator may not contain
4739 binary zeroes or newlines because the value is written to log lines and
4740 to spool files. There was no check on this. Now the value is run through
4741 the string_printing() function so that such characters are converted to
4742 printable escape sequences.
4744 PH/41 $message_linecount is a new variable that contains the total number of
4745 lines in the message. Compare $body_linecount, which is the count for the
4748 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4749 bounce and delay warning messages, except in certain special cases, which
4752 (a) An SMTP error message from a remote host;
4753 (b) A message specified in a :fail: redirection;
4754 (c) A message specified in a "fail" command in a system filter;
4755 (d) A message specified in a FAIL return from the queryprogram router;
4756 (e) A message specified by the cannot_route_message router option.
4758 In these cases only, Exim does include the error details in bounce and
4759 warning messages. There are also a few cases where bland messages such
4760 as "unrouteable address" or "local delivery error" are given.
4762 PH/43 $value is now also set for the "else" part of a ${run expansion.
4764 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4765 being worked on, but at least Exim now implements the latest version to
4768 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4769 process to complete was treated as a delivery failure, a timeout while
4770 writing the message to the pipe was logged, but erroneously treated as a
4771 successful delivery. Such timeouts include transport filter timeouts. For
4772 consistency with the overall process timeout, these timeouts are now
4773 treated as errors, giving rise to delivery failures by default. However,
4774 there is now a new Boolean option for the pipe transport called
4775 timeout_defer, which, if set TRUE, converts the failures into defers for
4776 both kinds of timeout. A transport filter timeout is now identified in
4779 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4780 systems where "make" and "gmake" are different, calling "gmake" at top
4781 level broke things. I've arranged for the value of $(MAKE) to be passed
4782 from the Makefile to this script so that it can call the same version of
4786 A note about Exim versions 4.44 and 4.50
4787 ----------------------------------------
4789 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4790 changes of various kinds. As a consequence, a big documentation update was
4791 needed. This delayed the release for rather longer than seemed good, especially
4792 in the light of a couple of (minor) security issues. Therefore, the changes
4793 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4794 release. So 4.44 and 4.50 are in effect two different branches that both start
4797 I have left the 4.50 change log unchanged; it contains all the changes since
4798 4.43. The change log for 4.44 is below; many of its items are identical to
4799 those for 4.50. This seems to be the most sensible way to preserve the
4800 historical information.
4806 1. Minor wording change to the doc/README.SIEVE file.
4808 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4809 computation of the current number of files was incorrect.
4811 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4812 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4815 4. Give more explanation in the error message when the command for a transport
4816 filter fails to execute.
4818 5. There are several places where Exim runs a non-Exim command in a
4819 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4820 was being done only for the command run by the queryprogram router. It is
4821 now done for all such subprocesses. The other cases are: ${run, transport
4822 filters, and the commands run by the lmtp and pipe transports.
4824 6. Added CONFIGURE_GROUP build-time option.
4826 7. Some older OS have a limit of 256 on the maximum number of file
4827 descriptors. Exim was using setrlimit() to set 1000 as a large value
4828 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4829 systems. I've change it so that if it can't get 1000, it tries for 256.
4831 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4832 was an oversight, and furthermore, ever since the addition of extra
4833 controls (e.g. 4.43/32), the checks on when to allow different forms of
4834 "control" were broken. There should now be diagnostics for all cases when a
4835 control that does not make sense is encountered.
4837 9. Added the /retain_sender option to "control=submission".
4839 10. $recipients is now available in the predata ACL (oversight).
4841 11. Tidy the search cache before the fork to do a delivery from a message
4842 received from the command line. Otherwise the child will trigger a lookup
4843 failure and thereby defer the delivery if it tries to use (for example) a
4844 cached ldap connection that the parent has called unbind on.
4846 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4847 of $address_data from the recipient verification was clobbered by the
4848 sender verification.
4850 13. The value of address_data from a sender verification is now available in
4851 $sender_address_data in subsequent conditions in the ACL statement.
4853 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4855 15. Added a new option "connect=<time>" to callout options, to set a different
4858 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4859 was its contents. (It was OK if the option was not defined at all.)
4861 17. A "Completed" log line is now written for messages that are removed from
4862 the spool by the -Mrm option.
4864 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4865 information about exactly what failed.
4867 19. Added -dd to debug only the daemon process.
4869 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4870 handles timeouts, both on the server side and network timeouts. Renamed the
4871 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4873 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4874 It is now set to "smtps".
4876 22. $host_address is now set to the target address during the checking of
4877 ignore_target_hosts.
4879 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4880 being passed; this would have caused $sender_host_name to have been used if
4881 matching the list had actually called for a host name (not very likely,
4882 since this list is usually IP addresses). A host name is now passed as
4885 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4886 code that specifies a non-restarting handler (typically sigaction() in
4887 modern systems) in an attempt to fix a rare and obscure crash bug.
4889 25. Narrowed the window for a race in the daemon that could cause it to ignore
4890 SIGCHLD signals. This is not a major problem, because they are used only to
4891 wake it up if nothing else does.
4893 26. A malformed maildirsize file could cause Exim to calculate negative values
4894 for the mailbox size or file count. Odd effects could occur as a result.
4895 The maildirsize information is now recalculated if the size or filecount
4898 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4899 support for a long time. Removed HAVE_SYS_VFS_H.
4901 28. Installed the latest version of exipick from John Jetmore.
4903 29. In an address list, if the pattern was not a regular expression, an empty
4904 subject address (from a bounce message) matched only if the pattern was an
4905 empty string. Non-empty patterns were not even tested. This was the wrong
4906 because it is perfectly reasonable to use an empty address as part of a
4907 database query. An empty address is now tested by patterns that are
4908 lookups. However, all the other forms of pattern expect the subject to
4909 contain a local part and a domain, and therefore, for them, an empty
4910 address still always fails if the pattern is not itself empty.
4912 30. Exim went into a mad DNS loop when attempting to do a callout where the
4913 host was specified on an smtp transport, and looking it up yielded more
4914 than one IP address.
4916 31. Re-factored the code for checking spool and log partition space into a
4917 function that finds that data and another that does the check. The former
4918 is then used to implement four new variables: $spool_space, $log_space,
4919 $spool_inodes, and $log_inodes.
4921 32. The RFC2047 encoding function was originally intended for short strings
4922 such as real names; it was not keeping to the 75-character limit for
4923 encoded words that the RFC imposes. It now respects the limit, and
4924 generates multiple encoded words if necessary. To be on the safe side, I
4925 have increased the buffer size for the ${rfc2047: expansion operator from
4928 33. It is now permitted to omit both strings after an "if" condition; if the
4929 condition is true, the result is "true". As before, when the second string
4930 is omitted, a false condition yields an empty string. This makes it less
4931 cumbersome to write custom ACL and router conditions.
4933 34. Failure to deliver a bounce message always caused it to be frozen, even if
4934 there was an errors_to setting on the router. The errors_to setting is now
4937 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4938 canonical form (fully expanded) before being placed in
4939 $sender_host_address.
4941 36. The table in the code that translates DNS record types into text (T_A to
4942 "A" for instance) was missing entries for NS and CNAME. It is just possible
4943 that this could have caused confusion if both these types were looked up
4944 for the same domain, because the text type is used as part of Exim's
4945 per-process caching. But the chance of anyone hitting this buglet seems
4948 37. The dnsdb lookup has been extended in a number of ways.
4950 (1) There is a new type, "zns", which walks up the domain tree until it
4951 finds some nameserver records. It should be used with care.
4953 (2) There is a new type, "mxh", which is like "mx" except that it returns
4954 just the host names, not the priorities.
4956 (3) It is now possible to give a list of domains (or IP addresses) to be
4957 looked up. The behaviour when one of the lookups defers can be
4958 controlled by a keyword.
4960 (4) It is now possible to specify the separator character for use when
4961 multiple records are returned.
4963 38. The dnslists ACL condition has been extended: it is now possible to supply
4964 a list of IP addresses and/or domains to be looked up in a particular DNS
4967 39. Added log_selector=+queue_time_overall.
4969 40. When running the queue in the test harness, wait just a tad after forking a
4970 delivery process, to get repeatability of debugging output.
4972 41. Include certificate and key file names in error message when GnuTLS fails
4973 to set them up, because the GnuTLS error message doesn't include the name
4974 of the failing file when there is a problem reading it.
4976 42. Allow both -bf and -bF in the same test run.
4978 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4980 44. The "Exiscan patch" is now merged into the mainline Exim source.
4982 45. Sometimes the final signoff response after QUIT could fail to get
4983 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4984 < 0 before doing a fflush(). This bug looks as though it goes back to the
4985 introduction of TLS in release 3.20, but "sometimes" must have been rare
4986 because the tests only now provoked it.
4988 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4989 (this can affect the format of dates).
4991 47. exim_tidydb, when checking for the continued existence of a message for
4992 which it has found a message-specific retry record, was not finding
4993 messages that were in split spool directories. Consequently, it was
4994 deleting retry records that should have stayed in existence.
4996 48. Steve fixed some bugs in eximstats.
4998 49. The SPA authentication driver was not abandoning authentication and moving
4999 on to the next authenticator when an expansion was forced to fail,
5000 contradicting the general specification for all authenticators. Instead it
5001 was generating a temporary error. It now behaves as specified.
5003 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5004 (the order specifies the preference for clients). The order is now AES256,
5005 AES128, 3DES, ARCFOUR128.
5007 51. Small patch to Sieve code - explicitly set From: when generating an
5010 52. Exim crashed if a remote delivery caused a very long error message to be
5011 recorded - for instance if somebody sent an entire SpamAssassin report back
5012 as a large number of 550 error lines. This bug was coincidentally fixed by
5013 increasing the size of one of Exim's internal buffers (big_buffer) that
5014 happened as part of the Exiscan merge. However, to be on the safe side, I
5015 have made the code more robust (and fixed the comments that describe what
5018 53. Now that there can be additional text after "Completed" in log lines (if
5019 the queue_time_overall log selector is set), a one-byte patch to exigrep
5020 was needed to allow it to recognize "Completed" as not the last thing in
5023 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5024 patch that reportedly fixes this has been added. I am not expert enough to
5025 create a test for it. This is what the patch creator wrote:
5027 "I found a little strange behaviour of ldap code when working with
5028 Windows 2003 AD Domain, where users was placed in more than one
5029 Organization Units. When I tried to give exim partial DN, the exit code
5030 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5031 But simultaneously result of request was absolutely normal ldap result,
5032 so I produce this patch..."
5034 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5035 REFERENCE, so I have modified the code to exclude the patch when that macro
5038 55. Some experimental protocols are using DNS PTR records for new purposes. The
5039 keys for these records are domain names, not reversed IP addresses. The
5040 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5041 leaves it alone. Component reversal etc. now happens only for IP addresses.
5044 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5046 57. Double the size of the debug message buffer (to 2048) so that more of very
5047 long debug lines gets shown.
5049 58. The exicyclog utility now does better if the number of log files to keep
5050 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5052 59. Two changes related to the smtp_active_hostname option:
5054 (1) $smtp_active_hostname is now available as a variable.
5055 (2) The default for smtp_banner uses $smtp_active_hostname instead
5056 of $primary_hostname.
5058 60. The host_aton() function is supposed to be passed a string that is known
5059 to be a valid IP address. However, in the case of IPv6 addresses, it was
5060 not checking this. This is a hostage to fortune. Exim now panics and dies
5061 if the condition is not met. A case was found where this could be provoked
5062 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5063 components; fortuitously, this particular loophole had already been fixed
5064 by change 4.50/55 above.
5066 If there are any other similar loopholes, the new check in host_aton()
5067 itself should stop them being exploited. The report I received stated that
5068 data on the command line could provoke the exploit when Exim was running as
5069 exim, but did not say which command line option was involved. All I could
5070 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5071 running as the user.
5074 61. There was a buffer overflow vulnerability in the SPA authentication code
5075 (which came originally from the Samba project). I have added a test to the
5076 spa_base64_to_bits() function which I hope fixes it.
5079 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5080 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5082 63. The daemon start-up calls getloadavg() while still root for those OS that
5083 need the first call to be done as root, but it missed one case: when
5084 deliver_queue_load_max is set with deliver_drop_privilege. This is
5085 necessary for the benefit of the queue runner, because there is no re-exec
5086 when deliver_drop_privilege is set.
5088 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5089 This has been fixed.
5091 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5092 was in use, was not putting the data itself into the right store pool;
5093 consequently, it could be overwritten for a subsequent message in the same
5094 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5097 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5099 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5100 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5101 the function were treating the return as a boolean value, which happened to
5102 work because 0=false and not-0=true, but is not correct code.
5104 68. The host_aton() function was not handling scoped IPv6 addresses (those
5105 with, for example, "%eth0" on the end) correctly.
5107 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5108 negated items (that is, ~something) in unsigned ints. Some compilers
5109 apparently mutter when there is no cast.
5111 70. If an address verification called from an ACL failed, and did not produce a
5112 user-specific message (i.e. there was only a "system" message), nothing was
5113 put in $acl_verify_message. In this situation, it now puts the system
5116 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5117 session; change 4.31/43 added the unwanted input to the log line - except
5118 that it did not do this in the start of session case. It now does.
5120 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5121 This is wrong and can cause the other end to generate a synchronization
5122 error if it is another Exim or anything else that does the synchronization
5123 check. A QUIT command is no longer sent after a timeout.
5125 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5126 during host lookups.
5128 74. The defer_ok option of callout verification was not working if it was used
5129 when verifying addresses in header lines, that is, for this case:
5131 verify = header_sender/callout=defer_ok
5133 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5134 those file descriptors could be used for SMTP connections. If anything
5135 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5136 could be sent to the SMTP client, causing chaos. The daemon now opens
5137 stdin, stdout, and stderr to /dev/null when it puts itself into the
5140 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5141 log by default. The user can override this with suitable Perl magic.
5143 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5144 the log message when discard triggers, was not working for the DATA ACL or
5145 for the non-SMTP ACL.
5147 78. Error message wording change in sieve.c.
5149 79. If smtp_accept_max_per_host was set, the number of connections could be
5150 restricted to fewer than expected, because the daemon was trying to set up
5151 a new connection before checking whether the processes handling previous
5152 connections had finished. The check for completed processes is now done
5153 earlier. On busy systems, this bug wouldn't be noticed because something
5154 else would have woken the daemon, and it would have reaped the completed
5157 80. If a message was submitted locally by a user whose login name contained one
5158 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5159 It caused a spool format error. I have fixed the spool reading code. A
5160 related problem was that the "from" clause in the Received: line became
5161 illegal because of the space(s). It is now covered by ${quote_local_part.
5163 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5166 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5168 83. Patch from Sieve maintainer to fix unterminated string problem in
5169 "vacation" handling.
5171 84. Some minor changes to the Linux configuration files to help with other
5172 OS variants using glibc.
5174 85. One more patch for Sieve to update vacation handling to latest spec.
5177 ----------------------------------------------------
5178 See the note above about the 4.44 and 4.50 releases.
5179 ----------------------------------------------------
5185 1. Change 4.43/35 introduced a bug that caused file counts to be
5186 incorrectly computed when quota_filecount was set in an appendfile
5189 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5190 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5193 3. Give more explanation in the error message when the command for a transport
5194 filter fails to execute.
5196 4. There are several places where Exim runs a non-Exim command in a
5197 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5198 was being done only for the command run by the queryprogram router. It is
5199 now done for all such subprocesses. The other cases are: ${run, transport
5200 filters, and the commands run by the lmtp and pipe transports.
5202 5. Some older OS have a limit of 256 on the maximum number of file
5203 descriptors. Exim was using setrlimit() to set 1000 as a large value
5204 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5205 systems. I've change it so that if it can't get 1000, it tries for 256.
5207 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5208 was an oversight, and furthermore, ever since the addition of extra
5209 controls (e.g. 4.43/32), the checks on when to allow different forms of
5210 "control" were broken. There should now be diagnostics for all cases when a
5211 control that does not make sense is encountered.
5213 7. $recipients is now available in the predata ACL (oversight).
5215 8. Tidy the search cache before the fork to do a delivery from a message
5216 received from the command line. Otherwise the child will trigger a lookup
5217 failure and thereby defer the delivery if it tries to use (for example) a
5218 cached ldap connection that the parent has called unbind on.
5220 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5221 of $address_data from the recipient verification was clobbered by the
5222 sender verification.
5224 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5225 was its contents. (It was OK if the option was not defined at all.)
5227 11. A "Completed" log line is now written for messages that are removed from
5228 the spool by the -Mrm option.
5230 12. $host_address is now set to the target address during the checking of
5231 ignore_target_hosts.
5233 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5234 being passed; this would have caused $sender_host_name to have been used if
5235 matching the list had actually called for a host name (not very likely,
5236 since this list is usually IP addresses). A host name is now passed as
5239 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5240 code that specifies a non-restarting handler (typically sigaction() in
5241 modern systems) in an attempt to fix a rare and obscure crash bug.
5243 15. Narrowed the window for a race in the daemon that could cause it to ignore
5244 SIGCHLD signals. This is not a major problem, because they are used only to
5245 wake it up if nothing else does.
5247 16. A malformed maildirsize file could cause Exim to calculate negative values
5248 for the mailbox size or file count. Odd effects could occur as a result.
5249 The maildirsize information is now recalculated if the size or filecount
5252 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5253 support for a long time. Removed HAVE_SYS_VFS_H.
5255 18. Updated exipick to current release from John Jetmore.
5257 19. Allow an empty sender to be matched against a lookup in an address list.
5258 Previously the only cases considered were a regular expression, or an
5261 20. Exim went into a mad DNS lookup loop when doing a callout where the
5262 host was specified on the transport, if the DNS lookup yielded more than
5265 21. The RFC2047 encoding function was originally intended for short strings
5266 such as real names; it was not keeping to the 75-character limit for
5267 encoded words that the RFC imposes. It now respects the limit, and
5268 generates multiple encoded words if necessary. To be on the safe side, I
5269 have increased the buffer size for the ${rfc2047: expansion operator from
5272 22. Failure to deliver a bounce message always caused it to be frozen, even if
5273 there was an errors_to setting on the router. The errors_to setting is now
5276 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5277 canonical form (fully expanded) before being placed in
5278 $sender_host_address.
5280 24. Updated eximstats to version 1.33
5282 25. Include certificate and key file names in error message when GnuTLS fails
5283 to set them up, because the GnuTLS error message doesn't include the name
5284 of the failing file when there is a problem reading it.
5286 26. Expand error message when OpenSSL has problems setting up cert/key files.
5289 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5290 (this can affect the format of dates).
5292 28. exim_tidydb, when checking for the continued existence of a message for
5293 which it has found a message-specific retry record, was not finding
5294 messages that were in split spool directories. Consequently, it was
5295 deleting retry records that should have stayed in existence.
5297 29. eximstats updated to version 1.35
5298 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5299 1.35 - bugfix such that pie charts by volume are generated correctly
5301 30. The SPA authentication driver was not abandoning authentication and moving
5302 on to the next authenticator when an expansion was forced to fail,
5303 contradicting the general specification for all authenticators. Instead it
5304 was generating a temporary error. It now behaves as specified.
5306 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5307 (the order specifies the preference for clients). The order is now AES256,
5308 AES128, 3DES, ARCFOUR128.
5310 31. Small patch to Sieve code - explicitly set From: when generating an
5313 32. Exim crashed if a remote delivery caused a very long error message to be
5314 recorded - for instance if somebody sent an entire SpamAssassin report back
5315 as a large number of 550 error lines. This bug was coincidentally fixed by
5316 increasing the size of one of Exim's internal buffers (big_buffer) that
5317 happened as part of the Exiscan merge. However, to be on the safe side, I
5318 have made the code more robust (and fixed the comments that describe what
5321 33. Some experimental protocols are using DNS PTR records for new purposes. The
5322 keys for these records are domain names, not reversed IP addresses. The
5323 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5324 leaves it alone. Component reversal etc. now happens only for IP addresses.
5327 34. The host_aton() function is supposed to be passed a string that is known
5328 to be a valid IP address. However, in the case of IPv6 addresses, it was
5329 not checking this. This is a hostage to fortune. Exim now panics and dies
5330 if the condition is not met. A case was found where this could be provoked
5331 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5332 components; fortuitously, this particular loophole had already been fixed
5333 by change 4.50/55 or 4.44/33 above.
5335 If there are any other similar loopholes, the new check in host_aton()
5336 itself should stop them being exploited. The report I received stated that
5337 data on the command line could provoke the exploit when Exim was running as
5338 exim, but did not say which command line option was involved. All I could
5339 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5340 running as the user.
5343 35. There was a buffer overflow vulnerability in the SPA authentication code
5344 (which came originally from the Samba project). I have added a test to the
5345 spa_base64_to_bits() function which I hope fixes it.
5348 36. The daemon start-up calls getloadavg() while still root for those OS that
5349 need the first call to be done as root, but it missed one case: when
5350 deliver_queue_load_max is set with deliver_drop_privilege. This is
5351 necessary for the benefit of the queue runner, because there is no re-exec
5352 when deliver_drop_privilege is set.
5354 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5355 was in use, was not putting the data itself into the right store pool;
5356 consequently, it could be overwritten for a subsequent message in the same
5357 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5360 38. Sometimes the final signoff response after QUIT could fail to get
5361 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5362 < 0 before doing a fflush(). This bug looks as though it goes back to the
5363 introduction of TLS in release 3.20, but "sometimes" must have been rare
5364 because the tests only now provoked it.
5370 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5371 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5372 Now it returns an integer. A number of calls were still expecting a T/F
5373 return. Fortuitously, in all cases, the tests worked in OK situations,
5374 which is the norm. However, things would have gone wrong on any write
5375 failures on the smtp file descriptor. This function is used when sending
5376 messages over SMTP and also when doing verify callouts.
5378 2. When Exim is called to do synchronous delivery of a locally submitted
5379 message (the -odf or -odi options), it no longer closes stderr before doing
5382 3. Implemented the mua_wrapper option.
5384 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5386 5. Implemented the functions header_remove(), header_testname(),
5387 header_add_at_position(), and receive_remove_recipient(), and exported them
5390 6. If an ACL "warn" statement specified the addition of headers, Exim already
5391 inserted X-ACL-Warn: at the start if there was no header name. However, it
5392 was not making this test for the second and subsequent header lines if
5393 there were newlines in the string. This meant that an invalid header could
5394 be inserted if Exim was badly configured.
5396 7. Allow an ACL "warn" statement to add header lines at the start or after all
5397 the Received: headers, as well as at the end.
5399 8. Added the rcpt_4xx retry error code.
5401 9. Added postmaster_mailfrom=xxx to callout verification option.
5403 10. Added mailfrom=xxxx to the callout verification option, for verify=
5406 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5407 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5409 12. Inserted some casts to stop certain compilers warning when using pointer
5410 differences as field lengths or precisions in printf-type calls (mostly
5411 affecting debugging statements).
5413 13. Added optional readline() support for -be (dynamically loaded).
5415 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5416 same clock tick as a message's arrival, so that its received time was the
5417 same as the "first fail" time on the retry record, and that message
5418 remained on the queue past the ultimate address timeout, every queue runner
5419 would try a delivery (because it was past the ultimate address timeout) but
5420 after another failure, the ultimate address timeout, which should have then
5421 bounced the address, did not kick in. This was a "< instead of <=" error;
5422 in most cases the first failure would have been in the next clock tick
5423 after the received time, and all would be well.
5425 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5426 being recognized when the domain list was tested by the match_domain
5427 condition in an expansion string.
5429 16. Added the ${str2b64: operator.
5431 17. Exim was always calling setrlimit() to set a large limit for the number of
5432 processes, without checking whether the existing limit was already
5433 adequate. (It did check for the limit on file descriptors.) Furthermore,
5434 errors from getrlimit() and setrlimit() were being ignored. Now they are
5435 logged to the main and panic logs, but Exim does carry on, to try to do its
5436 job under whatever limits there are.
5438 18. Imported PCRE 5.0.
5440 19. Trivial typo in log message " temporarily refused connection" (the leading
5443 20. If the log selector return_path_on_delivery was set and an address was
5444 redirected to /dev/null, the delivery process crashed because it assumed
5445 that a return path would always be set for a "successful" delivery. In this
5446 case, the whole delivery is bypassed as an optimization, and therefore no
5449 21. Internal re-arrangement: the function for sending a challenge and reading
5450 a response while authentication was assuming a zero-terminated challenge
5451 string. It's now changed to take a pointer and a length, to allow for
5452 binary data in such strings.
5454 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5456 23. Exim was not respecting finduser_retries when seeking the login of the
5457 uid under which it was called; it was always trying 10 times. (The default
5458 setting of finduser_retries is zero.) Also, it was sleeping after the final
5459 failure, which is pointless.
5461 24. Implemented tls_on_connect_ports.
5463 25. Implemented acl_smtp_predata.
5465 26. If the domain in control=submission is set empty, Exim assumes that the
5466 authenticated id is a complete email address when it generates From: or
5467 Sender: header lines.
5469 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5470 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5471 chown and chgrp in /bin and hostname in /usr/bin.
5473 28. Exim was keeping the "process log" file open after each use, just as it
5474 does for the main log. This opens the possibility of it remaining open for
5475 long periods when the USR1 signal hits a daemon. Occasional processlog
5476 errors were reported, that could have been caused by this. Anyway, it seems
5477 much more sensible not to leave this file open at all, so that is what now
5480 29. The long-running daemon process does not normally write to the log once it
5481 has entered its main loop, and it closes the log before doing so. This is
5482 so that log files can straightforwardly be renamed and moved. However,
5483 there are a couple of unusual error situations where the daemon does write
5484 log entries, and I had neglected to close the log afterwards.
5486 30. The text of an SMTP error response that was received during a remote
5487 delivery was being truncated at 512 bytes. This is too short for some of
5488 the long messages that one sometimes sees. I've increased the limit to
5491 31. It is now possible to make retry rules that apply only when a message has a
5492 specific sender, in particular, an empty sender.
5494 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5495 it possible to be selective about when SMTP synchronization is enforced.
5497 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5499 32. Implemented hosts_connection_nolog.
5501 33. Added an ACL for QUIT.
5503 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5506 35. Added mailbox_size and mailbox_filecount to appendfile.
5508 36. Added control = no_multiline_responses to ACLs.
5510 37. There was a bug in the logic of the code that waits for the clock to tick
5511 in the case where the clock went backwards by a substantial amount such
5512 that the microsecond fraction of "now" was more than the microsecond
5513 fraction of "then" (but the whole seconds number was less).
5515 38. Added support for the libradius Radius client library this is found on
5516 FreeBSD (previously only the radiusclient library was supported).
5522 1. When certain lookups returned multiple values in the form name=value, the
5523 quoting of the values was not always being done properly. Specifically:
5524 (a) If the value started with a double quote, but contained no whitespace,
5526 (b) If the value contained whitespace other than a space character (i.e.
5527 tabs or newlines or carriage returns) it was not quoted.
5528 This fix has been applied to the mysql and pgsql lookups by writing a
5529 separate quoting function and calling it from the lookup code. The fix
5530 should probably also be applied to nisplus, ibase and oracle lookups, but
5531 since I cannot test any of those, I have not disturbed their existing code.
5533 2. A hit in the callout cache for a specific address caused a log line with no
5534 reason for rejecting RCPT. Now it says "Previous (cached) callout
5535 verification failure".
5537 3. There was an off-by-one bug in the queryprogram router. An over-long
5538 return line was truncated at 256 instead of 255 characters, thereby
5539 overflowing its buffer with the terminating zero. As well as fixing this, I
5540 have increased the buffer size to 1024 (and made a note to document this).
5542 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5543 when Exim is waiting for an SMTP response from a remote server, Exim
5544 restarts its select() call on the socket, thereby resetting its timeout.
5545 This is not a problem when such interrupts are rare. Somebody set up a cron
5546 job to run exiwhat every 2 minutes, which is less than the normal select()
5547 timeout (5 or 10 minutes). This meant that the select() timeout never
5548 kicked in because it was always reset. I have fixed this by comparing the
5549 time when an interrupt arrives with the time at the start of the first call
5550 to select(). If more time than the timeout has elapsed, the interrupt is
5551 treated as a timeout.
5553 5. Some internal re-factoring in preparation for the addition of Sieve
5554 extensions (by MH). In particular, the "personal" test is moved to a
5555 separate function, and given an option for scanning Cc: and Bcc: (which is
5556 not set for Exim filters).
5558 6. When Exim created an email address using the login of the caller as the
5559 local part (e.g. when creating a From: or Sender: header line), it was not
5560 quoting the local part when it contained special characters such as @.
5562 7. Installed new OpenBSD configuration files.
5564 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5565 try to make them clearer.
5567 9. Callout options, other than the timeout value, were being ignored when
5568 verifying sender addresses in header lines. For example, when using
5570 verify = header_sender/callout=no_cache
5572 the cache was (incorrectly) being used.
5574 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5575 only the Cygwin environment.
5577 11. When return_path_on_delivery was set as a log selector, if different remote
5578 addresses in the same message used different return paths and parallel
5579 remote delivery occurred, the wrong values would sometimes be logged.
5580 (Whenever a remote delivery process finished, the return path value from
5581 the most recently started remote delivery process was logged.)
5583 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5584 lines when AUTH and/or TLS are in use. This is the "received protocol"
5585 field. Exim used to use "asmtp" for authenticated SMTP, without any
5586 indication (in the protocol name) for TLS use. Now it follows the RFC and
5587 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5588 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5589 names appear in log lines as well as in Received: header lines.
5591 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5592 extensions, and comparison tests, and to fix some bugs.
5594 14. Changes to the "personal" filter test:
5596 (1) The test was buggy in that it was just doing the equivalent of
5597 "contains" tests on header lines. For example, if a user's address was
5598 anne@some.where, the "personal" test would incorrectly be true for
5600 To: susanne@some.where
5602 This test is now done by extracting each address from the header in turn,
5603 and checking the entire address. Other tests that are part of "personal"
5604 are now done using regular expressions (for example, to check local parts
5605 of addresses in From: header lines).
5607 (2) The list of non-personal local parts in From: addresses has been
5608 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5609 taken from the Sieve specification recommendations.
5611 (3) If the message contains any header line starting with "List-" it is
5612 treated as non-personal.
5614 (4) The test for "circular" in the Subject: header line has been removed
5615 because it now seems ill-conceived.
5617 15. Minor typos in src/EDITME comments corrected.
5619 16. Installed latest exipick from John Jetmore.
5621 17. If headers_add on a router specified a text string that was too long for
5622 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5623 of string_sprintf() is now avoided.
5625 18. $message_body_size was not set (it was always zero) when running the DATA
5626 ACL and the local_scan() function.
5628 19. For the "mail" command in an Exim filter, no default was being set for
5629 the once_repeat time, causing a random time value to be used if "once" was
5630 specified. (If the value happened to be <= 0, no repeat happened.) The
5631 default is now 0s, meaning "never repeat". The "vacation" command was OK
5632 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5633 (I found it when inspecting the code).
5635 20. There is now an overall timeout for performing a callout verification. It
5636 defaults to 4 times the callout timeout, which applies to individual SMTP
5637 commands during the callout. The overall timeout applies when there is more
5638 than one host that can be tried. The timeout is checked before trying the
5639 next host. This prevents very long delays if there are a large number of
5640 hosts and all are timing out (e.g. when the network connections are timing
5641 out). The value of the overall timeout can be changed by specifying an
5642 additional sub-option for "callout", called "maxwait". For example:
5644 verify = sender/callout=5s,maxwait=20s
5646 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5647 to the end before writing, but this should make it even safer).
5649 22. Exim was forgetting that it had advertised PIPELINING for the second and
5650 subsequent messages on an SMTP connection. It was also not resetting its
5651 memory on STARTTLS and an internal HELO.
5653 23. When Exim logs an SMTP synchronization error within a session, it now
5654 records whether PIPELINING has been advertised or not.
5656 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5657 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5658 rather than long int.
5660 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5662 26. Added the never_mail option to autoreply.
5668 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5669 crash if the getsockname() call failed; this can happen if a connection is
5670 closed very soon after it is established. The problem was simply in the
5671 order in which certain operations were done, causing Exim to try to write
5672 to the SMTP stream before it had set up the file descriptor. The bug has
5673 been fixed by making things happen in the correct order.
5679 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5680 before the connection was closed, thus losing the rejection response.
5682 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5683 some early Solaris releases, but causes trouble in current releases where
5684 socklen_t is defined.
5686 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5689 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5692 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5693 that releasing the top of it at the end releases what was used for sub-
5694 expansions (unless the block got too big). However, discard this block if
5695 the first thing is a variable or header, so that we can use its block when
5696 it is dynamic (useful for very large $message_headers, for example).
5698 6. Lookups now cache *every* query, not just the most recent. A new, separate
5699 store pool is used for this. It can be recovered when all lookup caches are
5700 flushed. Lookups now release memory at the end of their result strings.
5701 This has involved some general refactoring of the lookup sources.
5703 7. Some code has been added to the store_xxx() functions to reduce the amount
5704 of flapping under certain conditions.
5706 8. log_incoming_interface used to affect only the <= reception log lines. Now
5707 it causes the local interface and port to be added to several more SMTP log
5708 lines, for example "SMTP connection from", and rejection lines.
5710 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5712 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5714 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5715 could be overwritten at the end of the current message (or the start of a
5716 new message if it was set in a HELO ACL). The value is now preserved for
5717 the duration of the SMTP connection.
5719 12. If a transport had a headers_rewrite setting, and a matching header line
5720 contained an unqualified address, that address was qualified, even if it
5721 did not match any rewriting rules. The underlying bug was that the values
5722 of the flags that permit the existence of unqualified sender and recipient
5723 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5724 non-local messages, and by -bnq for local messages) were not being
5725 preserved with the message after it was received.
5727 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5728 "next input=" as part of the text comprising the host identity instead of
5729 the correct text. The code was using the same buffer for two different
5730 strings. However, depending on which order the printing function evaluated
5731 its arguments, the bug did not always show up. Under Linux, for example, my
5732 test suite worked just fine.
5734 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5735 doesn't work with some older versions of Perl. It has been changed to "my",
5736 which in any case is probably the better facility to use.
5738 15. A really picky compiler found some instances of statements for creating
5739 error messages that either had too many or two few arguments for the format
5742 16. The size of the buffer for calls to the DNS resolver has been increased
5743 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5744 for addresses that have a lot of PTR records. This alleviates a problem; it
5745 does not fully solve it.
5747 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5748 buffer now truncates the list and logs the incident, which is the same
5749 action as happens when Exim is looking up a host name and its aliases.
5750 Previously in this situation something unpredictable would happen;
5751 sometimes it was "internal error: store_reset failed".
5753 18. If a server dropped the connection unexpectedly when an Exim client was
5754 using GnuTLS and trying to read a response, the client delivery process
5755 crashed while trying to generate an error log message.
5757 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5758 string, for example:
5760 warn message = H1: something\nH2: something
5762 the text was added as a single header line from Exim's point of view
5763 though it ended up OK in the delivered message. However, searching for the
5764 second and subsequent header lines using $h_h2: did not work. This has been
5765 fixed. Similarly, if a system filter added multiple headers in this way,
5766 the routers could not see them.
5768 20. Expanded the error message when iplsearch is called with an invalid key to
5769 suggest using net-iplsearch in a host list.
5771 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5772 ACLs are no longer actually imposed (and a message to that effect is
5775 22. If a "gecos" field in a passwd entry contained escaped characters, in
5776 particular, if it contained a \" sequence, Exim got it wrong when building
5777 a From: or a Sender: header from that name. A second bug also caused
5778 incorrect handling when an unquoted " was present following a character
5779 that needed quoting.
5781 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5782 was not being matched caselessly.
5784 24. Arranged for all hyphens in the exim.8 source to be escaped with
5787 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5788 properly. Recipient callout cache records were still being keyed to include
5789 the sender, even when use_sender was set false. This led to far more
5790 callouts that were necessary. The sender is no longer included in the key
5791 when use_sender is false.
5793 26. Added "control = submission" modifier to ACLs.
5795 27. Added the ${base62d: operator to decode base 62 numbers.
5797 28. dnsdb lookups can now access SRV records.
5799 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5800 the configuration file.
5802 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5803 (-v) mode. This makes the output for a verbose queue run more intelligible.
5805 31. Added a use_postmaster feature to recipient callouts.
5807 32. Added the $body_zerocount variable, containing the number of binary zero
5808 bytes in the message body.
5810 33. The time of last modification of the "new" subdirectory is now used as the
5811 "mailbox time last read" when there is a quota error for a maildir
5814 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5816 35. Added +ignore_unknown as a special item in host lists.
5818 36. Code for decoding IPv6 addresses in host lists is now included, even if
5819 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5820 address was recognized as an IP address, but was then not correctly decoded
5821 into binary, causing unexpected and incorrect effects when compared with
5828 1. Very minor rewording of debugging text in manualroute to say "list of
5829 hosts" instead of "hostlist".
5831 2. If verify=header_syntax was set, and a header line with an unqualified
5832 address (no domain) and a large number of spaces between the end of the
5833 name and the colon was received, the reception process suffered a buffer
5834 overflow, and (when I tested it) crashed. This was caused by some obsolete
5835 code that should have been removed. The fix is to remove it!
5837 3. When running in the test harness, delay a bit after writing a bounce
5838 message to get a bit more predictability in the log output.
5840 4. Added a call to search_tidyup() just before forking a reception process. In
5841 theory, someone could use a lookup in the expansion of smtp_accept_max_
5842 per_host which, without the tidyup, could leave open a database connection.
5844 5. Added the variables $recipient_data and $sender_data which get set from a
5845 lookup success in an ACL "recipients" or "senders" condition, or a router
5846 "senders" option, similar to $domain_data and $local_part_data.
5848 6. Moved the writing of debug_print from before to after the "senders" test
5851 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5852 problems for message scanning, either using a data ACL, or using
5853 local_scan() because the Received: header was not generated till after they
5854 were called (in order to set the time as the time of reception completion).
5855 I have revised the way this works. The header is now generated after the
5856 body is received, but before the ACL or local_scan() are called. After they
5857 are run, the timestamp in the header is updated.
5863 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5864 before starting a queue runner without re-exec. This happened only when
5865 deliver_drop_privilege was set or when the Exim user was set to root. The
5866 effect of the bug was that timeouts during subsequent deliveries caused
5867 crashes instead of being properly handled. The handler is now left at its
5868 default (and expected) setting.
5870 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5871 message, again when deliver_drop_privilege is set or Exim is run as root.
5872 The bug described in (1) was not present in this case, but the tidying up
5873 of the other signals was missing. I have made the two cases consistent.
5875 3. The ignore_target_hosts setting on a manualroute router was being ignored
5876 for hosts that were looked up using the /MX notation.
5878 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5881 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5882 operated on the sender address. After changing the $sender_address to <>
5883 for the sender address verify, Exim was re-instated it as the original
5884 (before rewriting) address, but remembering that it had rewritten it, so it
5885 wasn't rewriting it again. This bug also had the effect of breaking the
5886 sender address verification caching when the sender address was rewritten.
5888 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5889 This has been changed so that if the ip literal address matches
5890 ignore_target_hosts, the router declines.
5892 7. Added expansion conditions match_domain, match_address, and match_local_
5893 part (NOT match_host).
5895 8. The placeholder for the Received: header didn't have a length field set.
5897 9. Added code to Exim itself and to exim_lock to test for a specific race
5898 condition that could lead to file corruption when using MBX delivery. The
5899 issue is with the lockfile that is created in /tmp. If this file is removed
5900 after a process has opened it but before that process has acquired a lock,
5901 there is the potential for a second process to recreate the file and also
5902 acquire a lock. This could lead to two Exim processes writing to the file
5903 at the same time. The added code performs the same test as UW imapd; it
5904 checks after acquiring the lock that its file descriptor still refers to
5905 the same named file.
5907 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5908 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5911 11. Added the smtp_active_hostname option. If used, this will typically be made
5912 to depend on the incoming interface address. Because $interface_address is
5913 not set up until the daemon has forked a reception process, error responses
5914 that can happen earlier (such as "too many connections") no longer contain
5917 12. If an expansion in a condition on a "warn" statement fails because a lookup
5918 defers, the "warn" statement is abandoned, and the next ACL statement is
5919 processed. Previously this caused the whole ACL to be aborted.
5921 13. Added the iplsearch lookup type.
5923 14. Added ident_timeout as a log selector.
5925 15. Added tls_certificate_verified as a log selector.
5927 16. Added a global option tls_require_ciphers (compare the smtp transport
5928 option of the same name). This controls incoming TLS connections.
5930 17. I finally figured out how to make tls_require_ciphers do a similar thing
5931 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5932 before starting the TLS session.
5934 18. Tabs are now shown as \t in -bP output.
5936 19. If the log selector return_path_on_delivery was set, Exim crashed when
5937 bouncing a message because it had too many Received: header lines.
5939 20. If two routers both had headers_remove settings, and the first one included
5940 a superfluous trailing colon, the final name in the first list and the
5941 first name in the second list were incorrectly joined into one item (with a
5942 colon in the middle).
5948 1. Added -C and -D options to the exinext utility, mainly to make it easier
5949 to include in the automated testing, but these could be helpful when
5950 multiple configurations are in use.
5952 2. The exinext utility was not formatting the output nicely when there was
5953 an alternate port involved in the retry record key, nor when there was a
5954 message id as well (for retries that were specific to a specific message
5955 and a specific host). It was also confused by IPv6 addresses, because of
5956 the additional colons they contain. I have fixed the IPv4 problem, and
5957 patched it up to do a reasonable job for IPv6.
5959 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5960 delivery, the log line now contains "pipelined" if PIPELINING was used.
5962 4. An SMTP transport process used to panic and die if the bind() call to set
5963 an explicit outgoing interface failed. This has been changed; it is now
5964 treated in the same way as a connect() failure.
5966 5. A reference to $sender_host_name in the part of a conditional expansion
5967 that was being skipped was still causing a DNS lookup. This no longer
5970 6. The def: expansion condition was not recognizing references to header lines
5971 that used bh_ and bheader_.
5973 7. Added the _cache feature to named lists.
5975 8. The code for checking quota_filecount in the appendfile transport was
5976 allowing one more file than it should have been.
5978 9. For compatibility with Sendmail, the command line option
5986 and sets the incoming protocol and host name (for trusted callers). The
5987 host name and its colon can be omitted when only the protocol is to be set.
5988 Note the Exim already has two private options, -pd and -ps, that refer to
5989 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5990 "s", but I don't think that's a major issue.
5992 10. A number of refactoring changes to the code, none of which should affect
5995 (a) The number of logging options was getting close to filling up the
5996 32-bit word that was used as a bit map. I have split them into two classes:
5997 those that are passed in the argument to log_write(), and those that are
5998 only ever tested independently outside of that function. These are now in
5999 separate 32-bit words, so there is plenty of room for expansion again.
6000 There is no change in the user interface or the logging behaviour.
6002 (b) When building, for example, log lines, the code previously used a
6003 macro that called string_cat() twice, in order to add two strings. This is
6004 not really sufficiently general. Furthermore, there was one instance where
6005 it was actually wrong because one of the argument was used twice, and in
6006 one call a function was used. (As it happened, calling the function twice
6007 did not affect the overall behaviour.) The macro has been replaced by a
6008 function that can join an arbitrary number of extra strings onto a growing
6011 (c) The code for expansion conditions now uses a table and a binary chop
6012 instead of a serial search (which was left over from when there were very
6013 few conditions). Also, it now recognizes conditions like "pam" even when
6014 the relevant support is not compiled in: a suitably worded error message is
6015 given if an attempt is made to use such a condition.
6017 11. Added ${time_interval:xxxxx}.
6019 12. A bug was causing one of the ddress fields not to be passed back correctly
6020 from remote delivery subprocesses. The field in question was not being
6021 subsequently used, so this caused to problems in practice.
6023 13. Added new log selectors queue_time and deliver_time.
6025 14. Might have fixed a bug in maildirsizefile handling that threw up
6026 "unexpected character" debug warnings, and recalculated the data
6027 unnecessarily. In any case, I expanded the warning message to give more
6030 15. Added the message "Restricted characters in address" to the statements in
6031 the default ACL that block characters like @ and % in local parts.
6033 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6034 Three changes have been made:
6036 (a) There was a serious bug; a negative response to MAIL caused the whole
6037 recipient domain to be cached as invalid, thereby blocking all messages
6038 to all local parts at the same domain, from all senders. This bug has
6039 been fixed. The domain is no longer cached after a negative response to
6040 MAIL if the sender used is not empty.
6042 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6045 (c) A new callout option, "use_sender" has been added for people who want
6046 the modified behaviour.
6052 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6055 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6056 indeed breaks things for older releases.
6058 3. Added additional logging to the case where there is a problem reading data
6059 from a filter that is running in a subprocess using a pipe, in order to
6060 try to track down a specific problem.
6062 4. Testing facility fudge: when running in the test harness and attempting
6063 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6064 getting "No route to host". Convert this to a timeout.
6066 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6069 6. Some OS don't have socklen_t but use size_t instead. This affects the
6070 fifth argument of getsockopt() amongst other things. This is now
6071 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6072 can be set for individual OS. I have set it for SunOS5, OSF1, and
6073 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6074 some earlier ones do not.
6076 7. Change 4.30/15 was not doing the test caselessly.
6078 8. The standard form for an IPv6 address literal was being rejected by address
6079 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6080 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6081 this, as well as the form without the "IPv6" on the front (but only when
6082 address literals are enabled, of course).
6084 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6086 10. Exim crashed if a message with an empty sender address specified by -f
6087 encountered a router with an errors_to setting. This could be provoked only
6088 by a command such as
6092 where an empty string was supplied; "<>" did not hit this bug.
6094 11. Installed PCRE release 4.5.
6096 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6097 remained set. It is now erased.
6099 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6100 times from message ids (which are base 36 rather than the normal 62).
6102 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6103 were being counted as actual protocol errors, and logged if the log
6104 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6105 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6106 and DATA following a set of rejected RCPTs do not count as protocol errors.
6107 In other words, Exim assumes they were pipelined, though this may not
6108 actually be the case. Of course, in all cases the client gets an
6109 appropriate error code.
6111 15. If a lookup fails in an ACL condition, a message about the failure may
6112 be available; it is used if testing the ACL cannot continue, because most
6113 such messages specify what the cause of the deferral is. However, some
6114 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6115 that caused an old message to be retained and used if a later statement
6116 caused a defer, replacing the real cause of the deferral.
6118 16. If an IP address had so many PTR records that the DNS lookup buffer
6119 was not large enough to hold them, Exim could crash while trying to process
6120 the truncated data. It now detects and logs this case.
6122 17. Further to 4.21/58, another change has been made: if (and only if) the
6123 first line of a message (the first header line) ends with CRLF, a bare LF
6124 in a subsequent header line has a space inserted after it, so as not to
6125 terminate the header.
6127 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6128 unnecessarily, used atoi() instead of strtol(), and didn't check the
6129 termination when getting file sizes from file names by regex.
6131 19. Completely re-implemented the support for maildirsize files, in the light
6132 of a number of problems with the previous contributed implementation
6133 (4.30/29). In particular:
6135 . If the quota is zero, the maildirsize file is maintained, but no quota is
6138 . If the maildir directory does not exist, it is created before any attempt
6139 to write a maildirsize file.
6141 . The quota value in the file is just a cache; if the quota is changed in
6142 the transport, the new value overrides.
6144 . A regular expression is available for excluding directories from the
6147 20. The autoreply transport checks the characters in options that define the
6148 message's headers; it allows continued headers, but it was checking with
6149 isspace() after an embedded newline instead of explicitly looking for a
6152 21. If all the "regular" hosts to which an address was routed had passed their
6153 expiry times, and had not reached their retry times, the address was
6154 bounced, even if fallback hosts were defined. Now Exim should go on to try
6157 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6158 equivalent code in the SMTP transport. Some hosts send humungous responses
6159 to HELO/EHLO, more than 1024 it seems.
6161 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6162 gives compiler warnings in some environments. I've now done it "properly",
6165 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6166 (because of problems with the built-in one) was declared to return uschar *
6167 instead of char *, causing compiler failure.
6169 25. Fixed a file descriptor leak when processing alias/forward files.
6171 26. Fixed a minor format string issue in dbfn.c.
6173 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6175 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6176 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6179 29. When a sender address is verified, it is cached, to save repeating the test
6180 when there is more than one recipient in a message. However, when the
6181 verification involves a callout, it is possible for different callout
6182 options to be set for different recipients. It is too complicated to keep
6183 track of this in the cache, so now Exim always runs a verification when a
6184 callout is required, relying on the callout cache for the optimization.
6185 The overhead is duplication of the address routing, but this should not be
6188 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6189 to be verified with callout=postmaster, and the main callout worked but the
6190 postmaster check failed, the verification correctly failed. However, if a
6191 subsequent RCPT command asked for sender verification *without* the
6192 postmaster check, incorrect caching caused this verification also to fail,
6195 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6196 it was not caching the DNS options (qualify_single, search_parents) that
6197 were used when the lookup failed. A subsequent lookup with different
6198 options therefore always gave the same answer, though there were cases
6199 where it should not have. (Example: a "domains = !$mx_any" option on a
6200 dnslookup router: the "domains" option is always processed without any
6201 widening, but the router might have qualify_single set.) Now Exim uses the
6202 cached value only when the same options are set.
6204 32. Added John Jetmore's "exipick" utility to the distribution.
6206 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6207 than a timeout (e.g. a certificate is required, and is not provided), an
6208 Exim server now closes the connection immediately. Previously it waited for
6209 the client to close - but if the client is SSL, it seems that they each
6210 wait for each other, leading to a delay before one of them times out.
6212 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6213 maintained 0.8.x compatibility because I don't think many are using it, and
6214 it is clearly obsolete.
6216 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6219 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6220 client certificate was expired. A simple patch fixes this, though I don't
6221 understand the full logic of why the verify callback is called multiple
6224 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6225 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6226 which causes problems with some clients (such as the Certicom SSL Plus
6227 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6228 disables the coutermeasure allowing Eudora to connect."
6230 38. Exim was not checking that a write() to a log file succeeded. This could
6231 lead to Bad Things if a log got too big, in particular if it hit a file
6232 size limit. Exim now panics and dies if it cannot write to a log file, just
6233 as it does if it cannot open a log file.
6235 39. Modified OS/Makefile-Linux so that it now contains
6237 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6239 The two -D definitions ensure that Exim is compiled with large file
6240 support, which makes it possible to handle log files that are bigger than
6243 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6244 instance) a domain was checked against a named list that involved a lookup,
6245 causing $domain_data to be set, then another domain was checked against the
6246 same list, then the first domain was re-checked, the value of $domain_data
6247 after the final check could be wrong. In particular, if the second check
6248 failed, it could be set empty. This bug probably also applied to
6251 41. The strip_trailing_dot option was not being applied to the address given
6252 with the -f command-line option.
6254 42. The code for reading a message's header from the spool was incrementing
6255 $received_count, but never initializing it. This meant that the value was
6256 incorrect (doubled) while delivering a message in the same process in which
6257 it was received. In the most common configuration of Exim, this never
6258 happens - a fresh exec is done - but it can happen when
6259 deliver_drop_privilege is set.
6261 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6262 it now includes up to 150 characters of the unexpected data in the log
6265 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6266 and building data strings. The size of both of these buffers was 10 000
6267 bytes - far larger than anybody would *ever* want, thought I. Needless to
6268 say, somebody hit the limit. I have increased the maximum line length to
6269 20 000 and the maximum data length of concatenated lines to 100 000. I have
6270 also fixed two bugs, because there was no checking on these buffers. Tsk,
6271 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6272 buffer is too small.
6274 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6275 lsearch lookups. Now it does.
6277 46. When parsing a route_list item in a manualroute router, a fixed-length
6278 buffer was used for the list of hosts. I made this 1024 bytes long,
6279 thinking that nobody would ever have a list of hosts that long. Wrong.
6280 Somebody had a whole pile of complicated expansion conditions, and the
6281 string was silently truncated, leading to an expansion error. It turns out
6282 that it is easier to change to an unlimited length (owing to other changes
6283 that have happened since this code was originally written) than to build
6284 structure for giving a limitation error. The length of the item that
6285 expands into the list of hosts is now unlimited.
6287 47. The lsearch lookup could not handle data where the length of text line was
6288 more than 4095 characters. Such lines were truncated, leading to shortened
6289 data being returned. It should now handle lines of any length.
6291 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6292 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6295 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6296 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6297 no longer happens in comment lines. A list of replacements is now placed
6298 at the head of all of the source files, except those whose only change is
6299 to replace PERL_COMMAND in the very first #! line.
6301 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6302 messages on the queue, with a bottom-up merge sort, using code contributed
6303 by Michael Haardt. This should make operations like -bp somewhat faster on
6304 large queues. It won't affect queue runners, except when queue_run_in_order
6307 51. Installed eximstats 1.31 in the distribution.
6309 52. Added support for SRV lookups to the dnslookup router.
6311 53. If an ACL referred to $message_body or $message_body_end, the value was not
6312 reset for any messages that followed in the same SMTP session.
6314 54. The store-handling optimization for building very long strings was not
6315 differentiating between the different store pools. I don't think this
6316 actually made any difference in practice, but I've tidied it.
6318 55. While running the routers to verify a sender address, $sender_address
6319 was still set to the sender address. This is wrong, because when routing to
6320 send a bounce to the sender, it would be empty. Therefore, I have changed
6321 it so that, while verifying a sender address, $sender_address is set to <>.
6322 (There is no change to what happens when verifying a recipient address.)
6324 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6325 target A or AAAA records (if not already returned) without resetting the
6326 qualify_single or search_parents options of the DNS resolver. These are
6327 inappropriate in this case because the targets of MX and SRV records must
6328 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6329 target that, when qualified, matched something in the local domain. These
6330 two options are now turned off when doing these lookups.
6332 57. It seems that at least some releases of Reiserfs (which does not have the
6333 concept of a fixed number of inodes) returns zero and not -1 for the
6334 number of available inodes. This interacted badly with check_spool_inodes,
6335 which assumed that -1 was the "no such thing" setting. What I have done is
6336 to check that the total number of inodes is greater than zero before doing
6337 the test of how many are available.
6339 58. When a "warn" ACL statement has a log_message modifier, the message is
6340 remembered, and not repeated. This is to avoid a lot of repetition when a
6341 message has many recipients that cause the same warning to be written.
6342 However, Exim was preserving the list of already written lines for an
6343 entire SMTP session, which doesn't seem right. The memory is now reset if a
6344 new message is started.
6346 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6347 debugging output unless log_rewrite was also set.
6349 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6350 of (int)(handle) when we know that handle contains (void *)(-1).
6352 61. The Exim daemon panic-logs an error return when it closes the incoming
6353 connection. However "connection reset by peer" seems to be common, and
6354 isn't really an error worthy of noting specially, so that particular error
6357 62. When Exim is trying to find all the local interfaces, it used to panic and
6358 die if the ioctl to get the interface flags failed. However, it seems that
6359 on at least one OS (Solaris 9) it is possible to have an interface that is
6360 included in the list of interfaces, but for which you get a failure error
6361 for this call. This happens when the interface is not "plumbed" into a
6362 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6363 failure of the "get flags" call assumes that the interface is down.
6365 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6366 makes life easier for people who are doing arithmetic on fields extracted
6367 from dates, where you often get leading zeros that should not be
6368 interpreted as octal.
6370 64. Added qualify_domain to the redirect router, to override the global
6373 65. If a pathologically long header line contained very many addresses (the
6374 report of this problem mentioned 10 000) and each of them was rewritten,
6375 Exim could use up a very large amount of memory. (It kept on making new
6376 copies of the header line as it rewrote, and never released the old ones.)
6377 At the expense of a bit more processing, the header rewriting function has
6378 been changed so that it no longer eats memory in this way.
6380 66. The generation of the Received: header has been moved from the time that a
6381 message starts to be received, to the time that it finishes. The timestamp
6382 in the Received: header should now be very close to that of the <= log
6383 line. There are two side-effects of this change:
6385 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6386 logged header lines no longer include the local Received: line, because
6387 it has not yet been created. The same applies to a copy of the message
6388 that is returned to a non-SMTP sender when a message is rejected.
6390 (b) When a filter file is tested using -bf, no additional Received: header
6391 is added to the test message. After some thought, I decided that this
6394 This change does not affect the value of $received_for. It is still set
6395 after address rewriting, but before local_scan() is called.
6397 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6399 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6400 gave an unhelpful panic error message, and a defer error. I have managed to
6401 change this behaviour so that it now rejects any supplied certificate,
6402 which seems right, as the list of acceptable certificates is empty.
6404 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6405 gave an unhelpful defer error. I have not managed to make this reject any
6406 supplied certificates, but the error message it gives is "no certificate
6407 supplied", which is not helpful.
6409 70. exigrep's output now also includes lines that are not associated with any
6410 message, but which match the given pattern. Implemented by a patch from
6411 Martin Sluka, which also tidied up the Perl a bit.
6413 71. Recipient callout verification, like sender verification, was using <> in
6414 the MAIL FROM command. This isn't really the right thing, since the actual
6415 sender may affect whether the remote host accepts the recipient or not. I
6416 have changed it to use the actual sender in the callout; this means that
6417 the cache record is now keyed on a recipient/sender pair, not just the
6418 recipient address. There doesn't seem to be a real danger of callout loops,
6419 since a callout by the remote host to check the sender would use <>.
6420 [SEE ABOVE: changed after hitting problems.]
6422 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6423 temporary errors. However, in the case of such a code being given after
6424 the end of a data transmission (i.e. after ".") Exim was failing to write
6425 a retry record for the message. (Yes, there was some broken host that was
6426 actually sending 8xx at this point.)
6428 73. An unknown lookup type in a host list could cause Exim to panic-die when
6429 the list was checked. (An example that provoked this was putting <; in the
6430 middle of a list instead of at the start.) If this happened during a DATA
6431 ACL check, a -D file could be left lying around. This kind of configuration
6432 error no longer causes Exim to die; instead it causes a defer error. The
6433 incident is still logged to the main and panic logs.
6435 74. Buglet left over from Exim 3 conversion. The message "too many messages
6436 in one connection" was written to the rejectlog but not the mainlog, except
6437 when address rewriting (yes!) was being logged.
6439 75. Added write_rejectlog option.
6441 76. When a system filter was run not as root (that is, when system_filter_user
6442 was set), the values of the $n variables were not being returned to the
6443 main process; thus, they were not subsequently available in the $sn
6446 77. Added +return_path_on_delivery log selector.
6448 78. A connection timeout was being treated differently from recipients deferred
6449 when testing hosts_max_try with a message that was older than the host's
6450 retry timeout. (The host should not be counted, thus allowing all hosts to
6451 be tried at least once before bouncing.) This may have been the cause of an
6452 occasionally reported bug whereby a message would remain on the queue
6453 longer than the retry timeout, but would be bounced if a delivery was
6454 forced. I say "may" because I never totally pinned down the problem;
6455 setting up timeout/retry tests is difficult. See also the next item.
6457 79. The ultimate address timeout was not being applied to errors that involved
6458 a combination of host plus message (for example, a timeout on a MAIL
6459 command). When an address resolved to a number of possible hosts, and they
6460 were not all tried for each delivery (e.g. because of hosts_max_try), a
6461 message could remain on the queue longer than the retry timeout.
6463 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6466 81. Fixed an obscure SMTP outgoing bug which required at least the following
6467 conditions: (a) there was another message waiting for the same server;
6468 (b) the server returned 5xx to all RCPT commands in the first message so
6469 that the message was not completed; (c) the server dropped the connection
6470 or gave a negative response to the RSET that Exim sends to abort the
6471 transaction. The observed case was a dropped connection after DATA that had
6472 been sent in pipelining mode. That is, the server had advertised PIPELINING
6473 but was not implementing it correctly. The effect of the bug was incorrect
6474 behaviour, such as trying another host, and this could lead to a crash.
6480 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6481 and daemon.c were passed as pointers to ints; they should have been
6482 pointers to socklen_t variables (which are typically unsigned ints).
6484 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6487 3. Fixed a really odd bug that affected only the testing scheme; patching a
6488 certain fixed string in the binary changed the value of another string that
6489 happened to be identical to the end of the original first string.
6491 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6492 name", it returns that address as the IP address. On some operating
6493 systems (e.g. Solaris), it also passes back the IP address string as the
6494 "host name". However, on others (e.g. Linux), it passes back an empty
6495 string. Exim wasn't checking for this, and was changing the host name to an
6496 empty string, assuming it had been canonicalized.
6498 5. Although rare, it is permitted to have more than one PTR record for a given
6499 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6500 all the names associated with an address, because they do in Solaris.
6501 However, it seems that they do not in Linux for data that comes from the
6502 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6503 I found this out when I moved to a new Linux workstation and tried to run
6504 the Exim test suite.
6506 To get round this problem I have changed the code so that it now does its
6507 own call to the DNS to look up PTR records when searching for a host name.
6508 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6509 addresses that are only in /etc/hosts are still found.
6511 This behaviour is, however, controlled by an option called host_lookup_
6512 order, which defaults to "bydns:byaddr". If people want to use the other
6513 order, or indeed, just use one or the other means of lookup, they can
6514 specify it in this variable.
6516 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6517 some operating systems, this comes back from gethostbyaddr() as an empty
6518 string, and this is what Exim used to test for. However, it seems that in
6519 other systems, "." is yielded. Exim now tests for this case too.
6521 7. The values of check_spool_space and check_log_space are now held internally
6522 as a number of kilobytes instead of an absolute number of bytes. If a
6523 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6524 kilobyte. This means that much larger values can be stored.
6526 8. Exim monitor: an attempt to get the action menu when not actually pointing
6527 at a message produces an empty menu entitled "No message selected". This
6528 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6529 no entries in it ("Shell widget menu has zero width and/or height"). So I
6530 have added a single, blank menu entry in this case.
6532 9. Added ${quote_local_part.
6534 10. MIME decoding is now applied to the contents of Subject: header lines when
6537 11. Now that a reference to $sender_host_address automatically causes a reverse
6538 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6539 host lookup before query-style lookups in lists that might use this
6540 variable. This has therefore been abolished, and the "net-" prefix is no
6541 longer necessary for query-style lookups.
6543 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6544 have been a typo for LFLAGS, so it has been changed.
6546 13. The install script calls Exim with "-C /dev/null" in order to find the
6547 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6548 to be output. However, since Exim outputs its version number before the
6549 error, it didn't break the script. It just looked ugly. I fixed this by
6550 always allowing "-C /dev/null" if the caller is root.
6552 14. Ignore overlarge ACL variable number when reading spool file - insurance
6553 against a later release with more variables having written the file.
6555 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6556 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6557 this, as well as the form without the "IPv6" on the front.
6559 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6560 OS/Makefile-Darwin file.
6562 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6563 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6565 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6566 variable. However, some OS use ints for inodes. I've added cast to long int
6567 to get rid of the compiler warning.
6569 19. I had forgotten to lock out "/../" in configuration file names when
6570 ALT_CONFIG_PREFIX was set.
6572 20. Routers used for verification do not need to specify transports. However,
6573 if such a router generated a host list, and callout was configured, Exim
6574 crashed, because it could not find a port number from the (non-existent)
6575 transport. It now assumes port 25 in this circumstance.
6577 21. Added the -t option to exigrep.
6579 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6580 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6581 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6582 them is set, LOOKUP_LSEARCH is forced.
6584 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6586 24. Added sender and host information to the "rejected by local_scan()" log
6587 line; previously there was no indication of these.
6589 25. Added .include_if_exists.
6591 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6592 Linux. It turns out that not all file systems support this. Apparently some
6593 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6594 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6595 not supported on the file descriptor, is now ignored when Exim is trying to
6596 sync a directory. This applies only to Linux.
6598 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6600 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6601 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6604 29. Added support for maildirsize files from supplied patch (modified a bit).
6606 30. The use of :fail: followed by an empty string could lead Exim to respond to
6607 sender verification failures with (e.g.):
6609 550 Verification failed for <xxx>
6610 550 Sender verify failed
6612 where the first response line was missing the '-' that indicates it is not
6613 the final line of the response.
6615 31. The loop for finding the name of the user that called Exim had a hardwired
6616 limit of 10; it now uses the value of finduser_retries, which is used for
6617 all other user lookups.
6619 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6622 33. Exim was neglecting to zero errno before one call of strtol() when
6623 expanding a string and expecting an integer value. On some systems this
6624 resulted in spurious "integer overflow" errors. Also, it was casting the
6625 result into an int without checking.
6627 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6628 did not work. The code looks as if it has *never* worked, though it appears
6629 to have been documented since at least release 1.62. I have made it work.
6631 35. The "timeout_DNS" error in retry rules, also documented since at least
6632 1.62, also never worked. As it isn't clear exactly what this means, and
6633 clearly it isn't a major issue, I have abolished the feature by treating it
6634 as "timeout", and writing a warning to the main and panic logs.
6636 36. The display of retry rules for -brt wasn't always showing the error code
6639 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6640 timeout_connect_A, timeout_connect_MX.
6642 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6643 to the empty sender.
6645 39. The daemon was not analysing the content of -oX till after it had closed
6646 stderr and disconnected from the controlling terminal. This meant that any
6647 syntax errors were only noted on the panic log, and the return code from
6648 the command was 0. By re-arranging the code a little, I've made the
6649 decoding happen first, so such errors now appear on stderr, and the return
6650 code is 1. However, the actual setting up of the sockets still happens in
6651 the disconnected process, so errors there are still only recorded on the
6654 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6655 connections (as happens on some IP stacks) was logged at start up time as
6656 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6657 it from "IPv6 and IPv4", which means that two separate sockets are being
6660 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6661 says whether AF_INET or AF_INET6 was passed as an argument.
6663 42. Exiwhat output was messed up when time zones were included in log
6666 43. Exiwhat now gives more information about the daemon's listening ports,
6667 and whether -tls-on-connect was used.
6669 44. The "port" option of the smtp transport is now expanded.
6671 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6672 silently ignored. Now an error message is written to the main and panic
6675 46. There's a new ACL modifier called "logwrite" which writes to a log file
6676 as soon as it is encountered.
6678 47. Added $local_user_uid and $local_user_gid at routing time.
6680 48. Exim crashed when trying to verify a sender address that was being
6683 49. Exim was recognizing only a space character after ".include". It now also
6684 recognizes a tab character.
6686 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6687 extracting the relevant information from the specification. The man page no
6688 longer contains scrambled data for the -d option, and I've added a section
6689 at the front about calling Exim under different names.
6691 51. Added "extra_headers" argument to the "mail" command in filter files.
6693 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6696 53. Installed eximstats 1.29.
6698 54. Added transport_filter_timeout as a generic transport option.
6700 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6701 Cc: header lines. This was required by RFC 822, but it not required by RFC
6704 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6705 incoming messages that did not have them. Now it does so only if the
6706 message originates locally, that is, if there is no associated remote host
6707 address. When Resent- header lines are present, this applies to the Resent-
6708 lines rather than the non-Resent- lines.
6710 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6711 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6713 58. Messages for configuration errors now include the name of the main
6714 configuration file - useful now that there may be more than one file in a
6715 list (.included file names were always shown).
6717 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6718 for those rare installations that do not start the daemon as root or run it
6719 setuid root. I've cut out the call to initgroups() if the daemon is not
6722 60. The Exim user and group can now be bound into the binary as text strings
6723 that are looked up at the start of Exim's processing.
6725 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6727 62. Added $mailstore_basename variable.
6729 63. Installed patch to sieve.c from Michael Haardt.
6731 64. When Exim failed to open the panic log after failing to open the main log,
6732 the original message it was trying to log was written to stderr and debug
6733 output, but if they were not available (the usual case in production), it
6734 was lost. Now it is written to syslog before the two lines that record the
6735 failures to open the logs.
6737 65. Users' Exim filters run in subprocesses under the user's uid. It is
6738 possible for a "deliver" command or an alias in a "personal" command to
6739 provoke an address rewrite. If logging of address rewriting is configured,
6740 this fails because the process is not running as root or exim. There may be
6741 a better way of dealing with this, but for the moment (because 4.30 needs
6742 to be released), I have disabled address rewrite logging when running a
6743 filter in a non-root, non-exim process.
6749 1. The buildconfig auxiliary program wasn't quoting the value set for
6750 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6751 not defined. This bug was masked in 4.22 by the effect that was fixed in
6754 2. Some messages that were rejected after a message id was allocated were
6755 shown as "incomplete" by exigrep. It no longer does this for messages that
6756 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6758 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6759 have allow_domain_literals set, the ID did not get logged in the <= line.
6760 Domain literals are now always recognized in Message-ID: header lines.
6762 4. The first argument for a ${extract expansion item is the key name or field
6763 number. Leading and trailing spaces in this item were not being ignored,
6764 causing some misleading effects.
6766 5. When deliver_drop_privilege was set, single queue runner processes started
6767 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6768 same command in the process it spins off) were not dropping privilege.
6770 6. When the daemon running as "exim" started a queue runner, it always
6771 re-executed Exim in the spun-off process. This is a waste of effort when
6772 deliver_drop_privilege is set. The new process now just calls the
6773 queue-runner function directly.
6779 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6782 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6783 ignored. Though the use of -oP was forcing the writing of a pid file, it
6784 was always written to the default place.
6786 3. If the message "no IP address found for host xxxx" is generated during
6787 incoming verification, it is now followed by identification of the incoming
6788 connection (so you can more easily find what provoked it).
6790 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6792 5. Added some features to "harden" Exim a bit more against certain attacks:
6794 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6795 be put in Local/Makefile. This is like the never_users runtime option,
6796 but it cannot be overridden. The default setting is "root".
6798 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6799 prefix string with which any file named in a -C command line option
6802 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6803 is retained for -C and -D only if the caller of Exim is root. Without
6804 it, the exim user may also use -C and -D and retain privilege.
6806 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6807 command line option is disabled.
6809 6. Macro names set by the -D option must start with an upper case letter, just
6810 like macro names defined in the configuration file.
6812 7. Added "dereference=" facility to LDAP.
6814 8. Two instances of the typo "uknown" in the source files are fixed.
6816 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6817 the Configure-Makefile script screwed up while processing it.
6819 10. Incorporated PCRE 4.4.
6821 11. The SMTP synchronization check was not operating right at the start of an
6822 SMTP session. For example, it could not catch a HELO sent before the client
6823 waited for the greeting. There is now a check for outstanding input at the
6824 point when the greeting is written. Because of the duplex, asynchronous
6825 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6826 way, but not yet received, when the check is performed.
6828 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6829 on TCP/IP sockets, because this apparently causes some broken clients to
6832 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6833 unchanged) from the Cygwin maintainer.
6835 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6836 was supported instead of testing for mbx. Effectively a typo.
6838 15. The spa authenticator server code was not checking that the input it
6839 received was valid base64.
6841 16. The debug output line for the "set" modifier in ACLs was not showing the
6842 name of the variable that was being set.
6844 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6846 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6847 lookup on its own. Something else was needed to trigger the lookup. For
6848 example, a match in host_lookup or the need for a host name in a host list.
6849 Now, if $sender_host_name is referenced and the host name has not yet been
6850 looked up, a lookup is performed. If the lookup fails, the variable remains
6851 empty, and $host_lookup_failed is set to "1".
6853 19. Added "eqi" as a case-independent comparison operator.
6855 20. The saslauthd authentication condition could segfault if neither service
6856 nor realm was specified.
6858 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6859 error message that was logged was misleading, and incoming SMTP
6860 connections were dropped. The message is now more accurate, and temporary
6861 errors are given to SMTP connections.
6863 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6864 (except RSET) with a 421 error, until QUIT is received. However, it was
6865 failing to send a response to QUIT.
6867 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6868 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6869 ACL is now run after the helo_try_verify_hosts code.
6871 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6872 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6873 case-independent, so other case variants are also recognized). Apparently
6874 some systems use these upper case variants.
6876 25. If more than two messages were waiting for the same host, and a transport
6877 filter was specified for the transport, Exim sent two messages over the
6878 same TCP/IP connection, and then failed with "socket operation on non-
6879 socket" when it tried to send the third.
6881 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6883 27. The extern definition of crypt16() in expand.c was not being excluded when
6884 the OS had its own crypt16() function.
6886 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6887 as a preferred synonym for return_size_limit, both as an option and as an
6890 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6892 30. Changed the default configuration ACL to relax the local part checking rule
6893 for addresses that are not in any local domains. For these addresses,
6894 slashes and pipe symbols are allowed within local parts, but the sequence
6895 /../ is explicitly forbidden.
6897 31. SPA server authentication was not clearing the challenge buffer before
6900 32. log_message in a "warn" ACL statement was writing to the reject log as
6901 well as to the main log, which contradicts the documentation and doesn't
6902 seem right (because no rejection is happening). So I have stopped it.
6904 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6905 However, I am unable to do any testing of this.
6907 34. Fixed an infelicity in the appendfile transport. When checking directories
6908 for a mailbox, to see if any needed to be created, it was accidentally
6909 using path names with one or more superfluous leading slashes; tracing
6910 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6912 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6913 contents are added to the log line that is written for every discarded
6914 recipient. (Previously a log_message setting was ignored.)
6916 36. The ${quote: operator now quotes the string if it is empty.
6918 37. The install script runs exim in order to find its version number. If for
6919 some reason other than non-existence or emptiness, which it checks, it
6920 could not run './exim', it was installing it with an empty version number,
6921 i.e. as "exim-". This error state is now caught, and the installation is
6924 38. An argument was missing from the function that creates an error message
6925 when Exim fails to connect to the socket for saslauthd authentication.
6926 This could cause Exim to crash, or give a corrupted message.
6928 39. Added isip, isip4, and isip6 to ${if conditions.
6930 40. The ACL variables $acl_xx are now saved with the message, and can be
6931 accessed later in routers, transports, and filters.
6933 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6934 strings in the file are not string-expanded.
6936 42. If a MAIL command specified a SIZE value that was too large to fit into an
6937 int variable, the check against message_size_limit failed. Such values are
6938 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6939 day this will have to be increased, but I don't think I want to be around
6940 when emails are that large.
6947 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6948 iconv() is not standard in FreeBSD.
6950 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6951 IPv6 enabled. The observed symptom was a segmentation fault on return from
6952 the function os_common_find_running_interfaces() in src/os.c.
6954 3. In the check_special_case() function in daemon.c I had used "errno" as an
6955 argument name, which causes warnings on some systems. This was basically a
6956 typo, since it was named "eno" in the comments!
6958 4. The code that waits for the clock to tick (at a resolution of some fraction
6959 of a second) so as to ensure message-id uniqueness was always waiting for
6960 at least one whole tick, when it could have waited for less. [This is
6961 almost certainly not relevant at current processor speeds, where it is
6962 unlikely to ever wait at all. But we try to future-proof.]
6964 5. The function that sleeps for a time interval that includes fractions of a
6965 second contained a race. It did not block SIGALRM between setting the
6966 timer, and suspending (a couple of lines later). If the interval was short
6967 and the sigsuspend() was delayed until after it had expired, the suspension
6968 never ended. On busy systems this could lead to processes getting stuck for
6971 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6972 process, before it forks any delivery processes. The open lookup caching
6973 mechanism meant that the open file or database connection was passed into
6974 the delivery process. The problem was that delivery processes always tidy
6975 up cached lookup data. This could cause a problem for the next delivery
6976 process started by the queue runner, because the external queue runner
6977 process does not know about the closure. So the next delivery process
6978 still has data in the lookup cache. In the case of a file lookup, there was
6979 no problem because closing a file descriptor in a subprocess doesn't affect
6980 the parent. However, if the lookup was caching a connection to a database,
6981 the connection was closed, and the second delivery process was likely to
6982 see errors such as "PGSQL: query failed: server closed the connection
6983 unexpectedly". The problem has been fixed by closing all cached lookups
6984 in a queue runner before running a delivery process.
6986 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6987 seem to have the "const" qualifier which it has on other OS. I've
6990 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6991 *of the same type* (client or server) with the same public name that an
6992 error should be diagnosed.
6994 9. When Exim looked up a host name for an IP address, but failed to find the
6995 original IP address when looking up the host name (a safety check), it
6996 output the message "<ip address> does not match any IP for NULL", which was
6997 confusing, to say the least. The bug was that the host name should have
6998 appeared instead of "NULL".
7000 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7001 user that is built into the binary, and the -C or -D options is used, root
7002 privilege is dropped before the configuration file is read. In addition,
7003 logging is switched to stderr instead of the normal log files. If the
7004 configuration then re-defines the Exim user, the unprivileged environment
7005 is probably not what is expected, so Exim logs a panic warning message (but
7008 However, if deliver_drop_privilege is set, the unprivileged state may well
7009 be exactly what is intended, so the warning has been cut out in that case,
7010 and Exim is allowed to try to write to its normal log files.
7016 1. smtp_return_error_details was not giving details for temporary sender
7017 or receiver verification errors.
7019 2. Diagnose a configuration error if two authenticators have the same public
7022 3. Exim used not to create the message log file for a message until the first
7023 delivery attempt. This could be confusing when incoming messages were held
7024 for policy or load reasons. The message log file is now created at the time
7025 the message is received, and an initial "Received" line is written to it.
7027 4. The automatically generated man page for command line options had a minor
7028 bug that caused no ill effects; however, a more serious problem was that
7029 the procedure for building the man page automatically didn't always
7030 operate. Consequently, release 4.20 contains an out-of-date version. This
7031 shouldn't happen again.
7033 5. When building Exim with embedded Perl support, the script that builds the
7034 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7035 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7037 6. The freeze_tell option was not being used for messages that were frozen on
7038 arrival, either by an ACL or by local_scan().
7040 7. Added the smtp_incomplete_transaction log selector.
7042 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7043 was accepting AUTH without a new EHLO.
7045 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7046 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7049 10. Logging of TCP/IP connections (when configured) now happens in the main
7050 daemon process instead of the child process, so that the TCP/IP connection
7051 count is more accurate (but it can never be perfect).
7053 11. The use of "drop" in a nested ACL was not being handled correctly in the
7054 outer ACL. Now, if condition failure induced by the nested "drop" causes
7055 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7056 or "require"), the connection is dropped.
7058 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7059 that yield "discard" can now be used with an "accept" or a "discard" verb,
7060 but an error is generated for any others (because I can't see a useful way
7061 to define what should happen).
7063 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7064 are now processed in the same way as lines in the Exim configuration file.
7065 In particular, continuation lines are supported.
7067 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7069 15. Added -ti meaning -t -i.
7071 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7072 domains, and warn by logging if others are found.
7074 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7075 returned from GIFCONF when Exim is trying to find the list of interfaces on
7076 a host. The code in os.c has been modified to copy each ifreq to an aligned
7077 structure in all cases.
7079 Also, in some cases, the returned ifreq's were being copied to a 'struct
7080 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7081 means the last couple of bytes of an IPv6 address could be chopped if the
7082 ifreq contained only a normal sockaddr (14 bytes storage).
7084 18. Named domain lists were not supported in the hosts_treat_as_local option.
7085 An entry such as +xxxx was not recognized, and was treated as a literal
7088 19. Ensure that header lines added by a DATA ACL are included in the reject log
7089 if the ACL subsequently rejects the message.
7091 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7092 MD5 (which is deprecated).
7094 21. When testing a filter file using -bf, Exim was writing a message when it
7095 took the sender from a "From " line in the message, but it was not doing so
7096 when it took $return_path from a Return-Path: header line. It now does.
7098 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7099 with a valid header line field name (a series of printing characters
7100 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7102 23. Changed "disc" in the source to "disk" to conform to the documentation and
7103 the book and for uniformity.
7105 24. Ignore Sendmail's -Ooption=value command line item.
7107 25. When execve() failed while trying to run a command in a pipe transport,
7108 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7109 could be confused with a return value of 69 from the command itself. This
7110 has been changed to 127, the value the shell returns if it is asked to run
7111 a non-existent command. The wording for the related log line suggests a
7112 non-existent command as the problem.
7114 26. If received_header_text expands to an empty string, do not add a Received:
7115 header line to the message. (Well, it adds a token one on the spool, but
7116 marks it "old" so that it doesn't get used or transmitted.)
7118 27. Installed eximstats 1.28 (addition of -nt option).
7120 28. There was no check for failure on the call to getsockname() in the daemon
7121 code. This can fail if there is a shortage of resources on the system, with
7122 ENOMEM, for example. A temporary error is now given on failure.
7124 29. Contrary to the C standard, it seems that in some environments, the
7125 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7126 program. Exim now does this explicitly; it affects the formatting of
7127 timestamps using strftime().
7129 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7130 complaints. I've now initialized all the variables, to avoid this.
7132 32. Header lines added by a system filter were not being "seen" during
7133 transport-time rewrites.
7135 33. The info_callback() function passed to OpenSSL is set up with type void
7136 (*)(SSL *, int, int), as described somewhere. However, when calling the
7137 function (actually a macro) that sets it up, the type void(*)() is
7138 expected. I've put in a cast to prevent warnings from picky compilers.
7140 34. If a DNS black list lookup found a CNAME record, but there were no A
7141 records associated with the domain it pointed at, Exim crashed.
7143 35. If a DNS black list lookup returned more than one A record, Exim ignored
7144 all but the first. It now scans all returned addresses if a particular IP
7145 value is being sought. In this situation, the contents of the
7146 $dnslist_value variable are a list of all the addresses, separated by a
7149 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7150 to accept a host name and all its aliases if the forward lookup for any of
7151 them yielded the IP address of the incoming connection. Now it accepts only
7152 those names whose forward lookup yields the correct IP address. Any other
7153 names are discarded. This closes a loophole whereby a rogue DNS
7154 administrator could create reverse DNS records to break through a
7155 wildcarded host restriction in an ACL.
7157 37. If a user filter or a system filter that ran in a subprocess used any of
7158 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7159 the wrong values were passed to the pipe command ($thisaddress had the
7160 value of $0, $0 had the value of $1, etc). This bug was introduced by
7161 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7163 38. Improved the line breaking for long SMTP error messages from ACLs.
7164 Previously, if there was no break point between 40 and 75 characters, Exim
7165 left the rest of the message alone. Two changes have been made: (a) I've
7166 reduced the minimum length to 35 characters; (b) if it can't find a break
7167 point between 35 and 75 characters, it looks ahead and uses the first one
7168 that it finds. This may give the occasional overlong line, but at least the
7169 remaining text gets split now.
7171 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7172 file descriptors might be low, and that setting 1000 would always raise it.
7173 It turns out that in some environments, the limit is already over 1000 and
7174 that lowering it causes trouble. So now Exim takes care not to decrease it.
7176 40. When delivering a message, the value of $return_path is set to $sender_
7177 address at the start of routing (routers may change the value). By an
7178 oversight, this default was not being set up when an address was tested by
7179 -bt or -bv, which affected the outcome if any router or filter referred to
7182 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7183 log only when "message" or "log_message" are set. However, if one of the
7184 conditions was an address verification, or a call to a nested ACL, the
7185 messages generated by the underlying test were being passed through. This
7186 no longer happens. The underlying message is available in $acl_verify_
7187 message for both "message" and "log_message" expansions, so it can be
7188 passed through if needed.
7190 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7191 new expansion $bh_ to give the encoded byte string without charset
7192 translation. Translation happens only if iconv() is available; HAVE_ICONV
7193 indicates this at build time. HEADERS_CHARSET gives the charset to
7194 translate to; headers_charset can change it in the configuration, and
7195 "headers charset" can change it in an individual filter file.
7197 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7198 that creates RFC 2047 encoded "words" labels them as that charset instead
7199 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7200 expansion operator; (ii) when Exim creates a From: line for a local
7201 message; (iii) when a header line is rewritten to include a "phrase" part.
7203 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7204 buggy, causing it to skip the first lines of messages whose message ID
7205 ended in 'D'. This would not have bitten before Exim release 4.14, because
7206 message IDs were unlikely to end in 'D' before then. The effect was to have
7207 incorrect size information for certain domains.
7209 45. #include "config.h" was missing at the start of the crypt16.c module. This
7210 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7213 46. If there was a timeout during a "random" callout check, Exim treated it as
7214 a failure of the random address, and carried on sending RSET and the real
7215 address. If the delay was just some slowness somewhere, the response to the
7216 original RCPT would be taken as a response to RSET and so on, causing
7217 mayhem of various kinds.
7219 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7220 when I implemented it. It didn't allow for the fact that some option values
7221 may legitimately be negative (e.g. size_addition), and it didn't even do
7222 the right test for positive values.
7224 48. Domain names in DNS records are case-independent. Exim always looks them up
7225 in lower case. Some resolvers return domain names in exactly the case they
7226 appear in the zone file, that is, they may contain uppercase letters. Not
7227 all resolvers do this - some return always lower case. Exim was treating a
7228 change of case by a resolver as a change of domain, similar to a widening
7229 of a domain abbreviation. This triggered its re-routing code and so it was
7230 trying to route what was effectively the same domain again. This normally
7231 caused routing to fail (because the router wouldn't handle the domain
7232 twice). Now Exim checks for this case specially, and just changes the
7233 casing of the domain that it ultimately uses when it transmits the message
7236 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7239 50. If a filter generated a file delivery with a non-absolute name (possible if
7240 no home directory exists for the router), the forbid_file option was not
7243 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7244 the existing equality matching.
7246 52. Exim was using ints instead of ino_t variables in some places where it was
7247 dealing with inode numbers.
7249 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7250 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7251 called TMPDIR, and if it finds it is different, it changes its value.
7253 54. The smtp_printf() function is now made available to local_scan() so
7254 additional output lines can be written before returning. There is also an
7255 smtp_fflush() function to enable the detection of a dropped connection.
7256 The variables smtp_input and smtp_batched_input are exported to
7259 55. Changed the default runtime configuration: the message "Unknown user"
7260 has been removed from the ACL, and instead placed on the localuser router,
7261 using the cannot_route_message feature. This means that any verification
7262 failures that generate their own messages won't get overridden. Similarly,
7263 the "Unrouteable address" message that was in the ACL for unverifiable
7264 relay addresses has also been removed.
7266 56. Added hosts_avoid_esmtp to the smtp transport.
7268 57. The exicyclog script was not checking for the esoteric option
7269 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7270 will work only if exicyclog is run under the appropriate euid.
7272 58. Following a discussion on the list, the rules by which Exim recognises line
7273 endings on incoming messages have been changed. The -dropcr and drop_cr
7274 options are now no-ops, retained only for backwards compatibility. The
7275 following line terminators are recognized: LF CRLF CR. However, special
7276 processing applies to CR:
7278 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7279 nor a local message in the state where . is a terminator.
7281 (ii) If a bare CR is encountered in a header line, an extra space is added
7282 after the line terminator so as not to end the header. The reasoning
7283 behind this is that bare CRs in header lines are most likely either
7284 to be mistakes, or people trying to play silly games.
7286 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7287 was being incorrectly given as 18 bytes larger than it should have been.
7288 This is a VOB (very old bug).
7290 60. This may never have affected anything current, but just in case it has:
7291 When the local host is found other than at the start of a list of hosts,
7292 the local host, those with the same MX, and any that follow, are discarded.
7293 When the list in question was part of a longer list of hosts, the following
7294 hosts (not currently being processed) were also being discarded. This no
7295 longer happens. I'm not sure if this situation could ever has previously
7298 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7301 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7302 header. This is something that is recommended in a new Internet Draft, and
7303 is something that is documented as being done by Sendmail. There are two
7304 possible values. For messages generated by the autoreply transport, Exim
7307 Auto-Submitted: auto-replied
7309 whereas for all other generated messages (e.g. bounces) it adds
7311 Auto-Submitted: auto-generated
7313 63. The "personal" condition in filters now includes a test for the
7314 Auto-Submitted: header. If it contains the string "auto-" the message it
7315 not considered personal.
7317 64. Added rcpt_include_affixes as a generic transport option.
7319 65. Added queue_only_override (default true).
7321 66. Added the syslog_duplication option.
7323 67. If what should have been the first header line of a message consisted of
7324 a space followed by a colon, Exim was mis-interpreting it as a header line.
7325 It isn't of course - it is syntactically invalid and should therefore be
7326 treated as the start of the message body. The misbehaviour could have
7327 caused a number of strange effects, including loss of data in subsequent
7328 header lines, and spool format errors.
7330 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7331 client host had authenticated. This control can now be exercised by an ACL
7332 for more flexibility.
7334 69. By default, callouts do not happen when testing with -bh. There is now a
7335 variant, -bhc, which does actually run the callout code, including
7336 consulting and updating the callout cache.
7338 70. Added support for saslauthd authentication, courtesy of Alexander
7341 71. If statvfs() failed on the spool or log directories while checking their
7342 size for availability, Exim confusingly gave the error "space shortage".
7343 Furthermore, in debugging mode it crashed with a floating point exception.
7344 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7345 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7346 serious problem, Exim now writes to the main and panic logs when this
7347 happens, with details of the failure. It then refuses to accept the
7348 incoming message, giving the message "spool directory problem" or "log
7349 directory problem" with a 421 code for SMTP messages.
7351 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7352 0, 1, and 2 exist, because some OS complain for execs without them (see
7353 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7354 descriptors. However, the code omitted to check that the open succeeded,
7355 causing mysterious errors if for some reason the permissions on /dev/null
7356 got screwed. Now Exim writes a message to the main and panic logs, and
7357 bombs out if it can't open /dev/null.
7359 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7360 interact so that it is all more flexible. It is supposed to remain
7361 backwards compatible. Also added extra_local_interfaces.
7363 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7364 to bomb out with an assertion failure - to the client this appears as a
7365 connection drop. This problem occurs in the part of the code that was taken
7366 from the Samba project. Fortunately, the assertion is in a very simple
7367 function, so I have fixed this by reproducing the function inline in the
7368 one place where it is called, and arranging for authentication to fail
7369 instead of killing the process with assert().
7371 75. The SPA client code was not working when the server requested OEM rather
7372 than Unicode encoding.
7374 76. Added code to make require_files with a specific uid setting more usable in
7375 the case where statting the file as root fails - usually a non-root-mounted
7376 NFS file system. When this happens and the failure is EACCES, Exim now
7377 forks a subprocess and does the per-uid checking as the relevant uid.
7379 77. Added process_log_path.
7381 78. If log_file_path was not explicitly set, a setting of check_log_space or
7382 check_log_inodes was ignored.
7384 79. If a space check for the spool or log partitions fails, the incident is now
7385 logged. Of course, in the latter case the data may get lost...
7387 80. Added the %p formatting code to string_format() so that it can be used to
7388 print addresses in debug_print(). Adjusted all the address printing in the
7389 debugging in store.c to use %p rather than %d.
7391 81. There was a concern that a line of code in smtp_in.c could overflow a
7392 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7393 initially expressed, the concern was not well-founded, because trailing
7394 spaces are removed early. However, if the trailing spaces were followed by
7395 a NULL, they did not get removed, so the overflow was possible. Two fixes
7398 (a) I re-wrote the offending code in a cleaner fashion.
7399 (b) If an incoming SMTP command contains a NULL character, it is rejected
7402 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7403 runs initgroups(), so that if the Exim user is in any additional groups,
7404 they will be used during message reception.
7410 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob