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.
10 HS/01 Handle trailing backslash gracefully. (CVE-2019-15846)
16 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
22 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
23 buffer overrun for (non-chunking) other transports.
25 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
26 TLS1.3, means that a server rejecting a client certificate is not visible
27 to the client until the first read of encrypted data (typically the
28 response to EHLO). Add detection for that case and treat it as a failed
29 TLS connection attempt, so that the normal retry-in-clear can work (if
32 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
33 and/or domain. Found and fixed by Jason Betts.
35 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
36 configuration). If a CNAME target was not a wellformed name pattern, a
39 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
40 the OS reports them interleaved with other addresses.
42 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
43 used both for input and for a verify callout, both encrypted, SMTP
44 responses being sent by the server could be lost. This resulted in
45 dropped connections and sometimes bounces generated by a peer sending
48 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
49 string. Previously it was possible to cause undefined behaviour in a
50 library routine (usually a crash). Found by "zerons".
52 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
60 JH/01 Remove code calling the customisable local_scan function, unless a new
61 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
63 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
64 non-signal-safe functions being used.
66 JH/03 Bug 2269: When presented with a received message having a stupidly large
67 number of DKIM-Signature headers, disable DKIM verification to avoid
68 a resource-consumption attack. The limit is set at twenty.
70 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
71 report of oldest_pass in ${authres } in consequence, and separate out
72 some descriptions of reasons for verification fail.
74 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
75 files in the spool were present and unlocked. A queue-runner could spot
76 them, resulting in a duplicate delivery. Fix that by doing the unlock
77 after the unlink. Investigation by Tim Stewart. Take the opportunity to
78 add more error-checking on spoolfile handling while that code is being
81 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
82 No known attacks, no CVE, this is defensive hardening.
84 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
85 a queue-runner could start a delivery while other operations were ongoing.
86 Cutthrough delivery was a common victim, resulting in duplicate delivery.
87 Found and investigated by Tim Stewart. Fix by using the open message data
88 file handle rather than opening another, and not locally closing it (which
89 releases a lock) for that case, while creating the temporary .eml format
90 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
92 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
93 $sender_verify_failure/$recipient_verify_failure to "random".
95 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
98 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
99 Previously this would segfault.
101 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
104 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
105 like zero, since the resolver should be doing this for us, But we need one
106 as a CNAME but no MX presence gets the CNAME returned; we need to check
107 that doesn't point to an MX to declare it "no MX returned" rather than
108 "error, loop". A new main option is added so the older capability of
109 following some limited number of chain links is maintained.
111 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
113 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
114 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
115 now-deprecated earlier definitions used only specified the range up to TLS
116 1.2 (in the older-version library docs).
118 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
120 JH/15 Rework TLS client-side context management. Stop using a global, and
121 explicitly pass a context around. This enables future use of TLS for
122 connections to service-daemons (eg. malware scanning) while a client smtp
123 connection is using TLS; with cutthrough connections this is quite likely.
125 JH/16 Fix ARC verification to do AS checks in reverse order.
127 JH/17 Support a "tls" option on the ${readsocket } expansion item.
129 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
130 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
131 Previously the "utf8" would be re-prepended for every additional message.
133 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
134 Previously thery were accepted, resulting in issues when attempting to
135 forward messages to a non-supporting MTA.
137 PP/02 Let -n work with printing macros too, not just options.
139 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
140 one parent address was copied, and bogus data was used at delivery-logging
141 time. Either a crash (after delivery) or bogus log data could result.
142 Discovery and analysis by Tim Stewart.
144 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
145 Previously if the string ended mid-character, we did not insert the
146 promised '?' replacement.
148 PP/04 Documentation: current string operators work on bytes, not codepoints.
150 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
151 should pack well giving a smaller memory footprint so better caching and
152 therefore performance. Group the declarations where this can't be done so
153 that the byte-sized flag variables are not interspersed among pointer
154 variables, giving a better chance of good packing by the compiler.
156 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
157 non-null, to avoid issues with sites running BATV. Previously reports were
158 sent with an empty envelope sender so looked like bounces.
160 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
161 The ignore_error flag wasn't being returned from the filter subprocess so
162 was not set for later routers. Investigation and fix by Matthias Kurz.
164 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
165 and a msg:complete for the whole, when a message is manually removed using
166 -Mrm. Developement by Matthias Kurz, hacked on by JH.
168 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
169 a "Gnu special" function, asprintf() in the DB utility binary builds; I
170 hope that is portable enough.
172 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
173 requiring a known-CA anchor certificate; make it now rely entirely on the
174 TLSA as an anchor. Checking the name on the leaf cert against the name
175 on the A-record for the host is still done for TA (but not for EE mode).
177 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
178 included in delivery lines for non-proxied connections, when compiled with
179 SUPPORT_SOCKS and running with proxy logging enabled.
181 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
182 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
183 move the existing event to fire before the normal logging of message
184 failure so that custom logging is bracketed by normal logging.
186 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
187 msg:fail:internal event. Developement by Matthias Kurz.
189 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
190 far too small for todays use of crypto signatures stored there. Go all
191 the way to the max DNS message size of 64kB, even though this might be
192 overmuch for IOT constrained device use.
194 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
195 copy a string over itself. The library routine is documented as not
196 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
198 JH/32 For main options check_spool_space and check_inode_space, where the
199 platform supports 64b integers, support more than the previous 2^31 kB
200 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
201 the previous G, M, k.
203 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
204 $authenticated_fail_id variable on authentication failure. Previously
207 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
208 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
209 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
210 GNUTLS_SEC_PARAM_MEDIUM.
212 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
213 side. Previously we would continue as if no SNI had been received.
215 JH/36 Harden the handling of string-lists. When a list consisted of a sole
216 "<" character, which should be a list-separator specification, we walked
217 off past the nul-terimation.
219 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
220 causes) even when the retry time is not yet met. Previously they were
221 not, meaning that when (say) an account was over-quota and temp-rejecting,
222 and multiple senders' messages were queued, only one sender would get
223 notified on each configured delay_warning cycle.
225 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
227 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
228 cipher-suites, an error can be left on the stack even for a succeeding
229 accept; this results in impossible error messages when a later operation
232 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
233 return error codes indicating retry. Under TLS1.3 this becomes required.
235 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
236 it only wrote the new authenticators, resulting in a lack of tracking of
237 peer changes of ESMTP extensions until the next cache flush.
239 JH/41 Fix the loop reading a message header line to check for integer overflow,
240 and more-often against header_maxsize. Previously a crafted message could
241 induce a crash of the recive process; now the message is cleanly rejected.
243 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
244 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
250 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
251 When redis_servers is set to a list of > 1 element, and the Redis servers
252 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
253 case of MOVED into a DEFER case instead, thus moving the query onto the
254 next server in the list. For a cluster of N elements, all N servers must
255 be defined in redis_servers.
257 GF/02 Catch and remove uninitialized value warning in exiqsumm
258 Check for existence of @ARGV before looking at $ARGV[0]
260 JH/01 Replace the store_release() internal interface with store_newblock(),
261 which internalises the check required to safely use the old one, plus
262 the allocate and data copy operations duplicated in both (!) of the
263 extant use locations.
265 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
266 modifier. This matches the restriction on the commandline.
268 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
269 Previously only the last row was returned.
271 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
272 we assumed that tags in the header were well-formed, and parsed the
273 element content after inspecting only the first char of the tag.
274 Assumptions at that stage could crash the receive process on malformed
277 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
278 While running the DKIM ACL we operate on the Permanent memory pool so that
279 variables created with "set" persist to the DATA ACL. Also (at any time)
280 DNS lookups that fail create cache records using the Permanent pool. But
281 expansions release any allocations made on the current pool - so a dnsdb
282 lookup expansion done in the DKIM ACL releases the memory used for the
283 DNS negative-cache, and bad things result. Solution is to switch to the
284 Main pool for expansions.
285 While we're in that code, add checks on the DNS cache during store_reset,
286 active in the testsuite.
287 Problem spotted, and debugging aided, by Wolfgang Breyha.
289 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
290 When none of the hosts presented to a transport match an already-open
291 connection, close it and proceed with the list. Previously we would
292 queue the message. Spotted by Lena with Yahoo, probably involving
295 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
296 Previously a spurious "250 OK id=" response was appended to the proper
299 JH/08 The "support for" informational output now, which built with Content
300 Scanning support, has a line for the malware scanner interfaces compiled
301 in. Interface can be individually included or not at build time.
303 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
304 by the template makefile "src/EDITME". The "STREAM" support for an older
305 ClamAV interface method is removed.
307 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
308 rows affected is given instead).
310 JH/11 The runtime Berkeley DB library version is now additionally output by
311 "exim -d -bV". Previously only the compile-time version was shown.
313 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
314 SMTP connection. Previously, when one had more receipients than the
315 first, an abortive onward connection was made. Move to full support for
316 multiple onward connections in sequence, handling cutthrough connection
317 for all multi-message initiating connections.
319 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
320 routers. Previously, a multi-recipient message would fail to match the
321 onward-connection opened for the first recipient, and cause its closure.
323 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
324 a timeout on read on a GnuTLS initiating connection, resulting in the
325 initiating connection being dropped. This mattered most when the callout
326 was marked defer_ok. Fix to keep the two timeout-detection methods
329 JH/15 Relax results from ACL control request to enable cutthrough, in
330 unsupported situations, from error to silently (except under debug)
331 ignoring. This covers use with PRDR, frozen messages, queue-only and
334 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
336 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
337 metadata, resulting in a crash in free().
339 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
340 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
341 Broken also in d185889f4, with init system revamp.
343 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
344 Previously we abruptly closed the connection after reading a malware-
345 found indication; now we go on to read the "scan ok" response line,
348 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
349 ACL. Previously, a crash would result.
351 JH/19 Speed up macro lookups during configuration file read, by skipping non-
352 macro text after a replacement (previously it was only once per line) and
353 by skipping builtin macros when searching for an uppercase lead character.
355 JH/20 DANE support moved from Experimental to mainline. The Makefile control
356 for the build is renamed.
358 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
359 was allocated for every new TLS startup, meaning one per message. Fix
360 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
362 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
363 reported the original. Fix to report (as far as possible) the ACL
364 result replacing the original.
366 JH/23 Fix memory leak during multi-message connections using STARTTLS under
367 OpenSSL. Certificate information is loaded for every new TLS startup,
368 and the resources needed to be freed.
370 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
372 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
375 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
376 DATA response info to the (existing) per-recipient response info for
377 the "C=" log element. It can have useful tracking info from the
378 destination system. Patch from Simon Arlott.
380 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
381 length value. Previously this would segfault.
383 HS/02 Support Avast multiline protoocol, this allows passing flags to
384 newer versions of the scanner.
386 JH/28 Ensure that variables possibly set during message acceptance are marked
387 dead before release of memory in the daemon loop. This stops complaints
388 about them when the debug_store option is enabled. Discovered specifically
389 for sender_rate_period, but applies to a whole set of variables.
390 Do the same for the queue-runner and queue-list loops, for variables set
391 from spool message files. Do the same for the SMTP per-message loop, for
392 certain variables indirectly set in ACL operations.
394 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
395 as a multi-recipient message from a mailinglist manager). The coding had
396 an arbitrary cutoff number of characters while checking for more input;
397 enforced by writing a NUL into the buffer. This corrupted long / fast
398 input. The problem was exposed more widely when more pipelineing of SMTP
399 responses was introduced, and one Exim system was feeding another.
400 The symptom is log complaints of SMTP syntax error (NUL chars) on the
401 receiving system, and refused recipients seen by the sending system
402 (propating to people being dropped from mailing lists).
403 Discovered and pinpointed by David Carter.
405 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
406 replaced by the ${authresults } expansion.
408 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
410 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
411 allows proper process termination in container environments.
413 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
414 Previously the "final dot" had a newline after it; ensure it is CR,LF.
416 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
417 and "err_perm", deprecated since 4.83 when the RFC-defined words
418 "temperror" and "permerror" were introduced.
420 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
421 transport-filters or DKIM-signing. The restriction was lost in the
422 consolidation of verify-callout and delivery SMTP handling.
423 Extend the restriction to also cover ARC-signing.
425 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
426 in defer=pass mode supply a 450 to the initiator. Previously the message
429 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
430 tls_require_ciphers is used as before.
432 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
433 "pass_unscanned". Only tmpfails from the scanner are written to
434 the paniclog, as they may require admin intervention (permission
435 denied, license issues). Other scanner errors (like decompression
436 bombs) do not cause a paniclog entry.
438 JH/36 Fix reinitialisation of DKIM logging variable between messages.
439 Previously it was possible to log spurious information in receive log
442 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
443 triggered odd behaviour from Outlook Express clients.
445 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
448 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
449 since the IETF WG has not yet settled on that versus the original
450 "bare" representation.
452 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
453 Previously the millisecond value corrupted the output.
454 Fix also for syslog_pid=no and log_selector +pid, for which the pid
455 corrupted the output.
461 JH/01 Rework error string handling in TLS interface so that the caller in
462 more cases is responsible for logging. This permits library-sourced
463 string to be attached to addresses during delivery, and collapses
464 pairs of long lines into single ones.
466 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
467 during configuration. Wildcards are allowed and expanded.
469 JH/02 Rework error string handling in DKIM to pass more info back to callers.
470 This permits better logging.
472 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
473 do not close it down and have the child transport start it up again on
474 the passed-on TCP connection. Instead, proxy the child (and any
475 subsequent ones) for TLS via a unix-domain socket channel. Logging is
476 affected: the continued delivery log lines do not have any DNSSEC, TLS
477 Certificate or OCSP information. TLS cipher information is still logged.
479 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
480 identical IP addresses on different listening ports. Will also affect
483 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
484 add noisy ifdef guards to special-case this sillyness.
485 Patch from Bernd Kuhls.
487 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
488 than 255 are no longer allowed.
490 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
491 Disable the session-cache too, which might reduce our load. Since we
492 currrectly use a new context for every connection, both as server and
493 client, there is no benefit for these.
494 GnuTLS appears to not support tickets server-side by default (we don't
495 call gnutls_session_ticket_enable_server()) but client side is enabled
496 by default on recent versions (3.1.3 +) unless the PFS priority string
499 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
500 <https://reproducible-builds.org/specs/source-date-epoch/>.
502 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
503 the check for any unsuccessful recipients did not notice the limit, and
504 erroneously found still-pending ones.
506 JH/08 Pipeline CHUNKING command and data together, on kernels that support
507 MSG_MORE. Only in-clear (not on TLS connections).
509 JH/09 Avoid using a temporary file during transport using dkim. Unless a
510 transport-filter is involved we can buffer the headers in memory for
511 creating the signature, and read the spool data file once for the
512 signature and again for transmission.
514 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
515 4.77 as the kernel support then wasn't solid, having issues in 64bit
516 mode. Now, it's been long enough. Add support for FreeBSD also.
518 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
519 case where the routing stage had gathered several addresses to send to
520 a host before calling the transport for the first, we previously failed
521 to close down TLS in the old transport process before passing the TCP
522 connection to the new process. The new one sent a STARTTLS command
523 which naturally failed, giving a failed delivery and bloating the retry
524 database. Investigation and fix prototype from Wolfgang Breyha.
526 JH/12 Fix check on SMTP command input synchronisation. Previously there were
527 false-negatives in the check that the sender had not preempted a response
528 or prompt from Exim (running as a server), due to that code's lack of
529 awareness of the SMTP input buffering.
531 PP/04 Add commandline_checks_require_admin option.
532 Exim drops privileges sanely, various checks such as -be aren't a
533 security problem, as long as you trust local users with access to their
534 own account. When invoked by services which pass untrusted data to
535 Exim, this might be an issue. Set this option in main configuration
536 AND make fixes to the calling application, such as using `--` to stop
539 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
540 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
541 responses to those, into a single TLS record each way (this usually means
542 a single packet). As a side issue, smtp_enforce_sync now works on TLS
545 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
546 affects you only if you're dancing at the edge of the param size limits.
547 If you are, and this message makes sense to you, then: raise the
548 configured limit or use OpenSSL 1.1. Nothing we can do for older
551 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
552 cmdline element to get the documented default one. Previously it was
555 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
556 are unsuable for non-message-specific reasons - eg. connection timeout,
557 banner-time rejection.
559 JH/16 Fix logging of delivery remote port, when specified by router, under
562 PP/06 Repair manualroute's ability to take options in any order, even if one
563 is the name of a transport.
566 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
568 JH/17 Change the list-building routines interface to use the expanding-string
569 triplet model, for better allocation and copying behaviour.
571 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
572 Previously it was constructed the first time a possibly-matching string
573 was met in the configuration file input during startup; now it is done
576 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
577 compatible one, to avoid the (poorly documented) possibility of a config
578 file in the working directory redirecting the DB files, possibly correpting
579 some existing file. CVE-2017-10140 assigned for BDB.
581 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
582 cache-hot. Previously, although the result was properly cached, the
583 initial verify call returned a defer.
585 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
586 the main verify for receipient in uncached-mode.
588 JH/22 Retire historical build files to an "unsupported" subdir. These are
589 defined as "ones for which we have no current evidence of testing".
591 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
592 if present. Previously it was ignored.
594 JH/24 Start using specified-initialisers in C structure init coding. This is
595 a C99 feature (it's 2017, so now considered safe).
597 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
598 if was a fixed-sized field and bitmask ops via macros; it is now more
601 PP/07 GitHub PR 56: Apply MariaDB build fix.
602 Patch provided by Jaroslav Škarvada.
604 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
605 during Coverity cleanups [4.87 JH/47]
606 Diagnosis and fix provided by Michael Fischer v. Mollard.
608 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
609 the right size to place the terminating semicolon on its own folded
610 line, the header hash was calculated to an incorrect value thanks to
611 the (relaxed) space the fold became.
613 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
614 and confused the parent.
616 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
617 which could crash as a result. This could lead to undeliverable messages.
619 JH/28 Logging: "next input sent too soon" now shows where input was truncated
622 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
623 matters on fast-turnover and PID-randomising systems, which were getting
624 out-of-order delivery.
626 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
627 a possibly-overlapping copy. The symptom was that "Remote host closed
628 connection in response to HELO" was logged instead of the actual 4xx
631 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
632 Previously only that bufferd was discarded, resulting in SYMTP command
635 JH/32 DKIM: when a message has multiple signatures matching an identity given
636 in dkim_verify_signers, run the dkim acl once for each. Previously only
637 one run was done. Bug 2189.
639 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
640 "panic the current process" to "deliberately defer". The panic log is
641 still written with the problem list name; the mail and reject logs now
642 get a temp-reject line for the message that was being handled, saying
643 something like "domains check lookup or other defer". The SMTP 451
644 message is still "Temporary local problem".
646 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
647 A crafted sequence of BDAT commands could result in in-use memory beeing
648 freed. CVE-2017-16943.
650 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
651 from SMTP input. Previously it was always done; now only done for DATA
652 and not BDAT commands. CVE-2017-16944.
654 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
655 to the message (such as an overlong header line). Previously this was
656 not done and we did not exit BDAT mode. Followon from the previous item
657 though a different problem.
663 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
664 than -2003 did; needs libidn2 in addition to libidn.
666 JH/02 The path option on a pipe transport is now expanded before use.
668 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
669 Patch provided by "Björn", documentation fix added too.
671 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
672 missing a wire-to-host endian conversion.
674 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
675 close after a BDAT command line could be taken as a following command,
676 giving a synch failure. Fix by only checking for synch immediately
677 before acknowledging the chunk.
679 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
680 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
681 macro. Patches provided by Josh Soref.
683 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
684 Previously we did not; the RFC seems ambiguous and VRFY is not listed
685 by IANA as a service extension. However, John Klensin suggests that we
688 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
689 the dkim code may be unix-mode line endings rather than smtp wire-format
690 CRLF, so prepend a CR to any bare LF.
692 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
693 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
695 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
696 the first were themselves being wrongly included in the feed into dkim
697 processing; with most chunk sizes in use this resulted in an incorrect
698 body hash calculated value.
700 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
701 DKIM signature block, for verification. Although advised against by
702 standards it is specifically not ruled illegal.
704 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
706 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
707 missing a body hash (the bh= tag).
709 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
710 It seems that HAProxy sends the Proxy Protocol information in clear and
711 only then does a TLS startup, so do the same.
713 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
714 TCP connections (such as for Spamd) unless the daemon successfully set
715 Fast Open mode on its listening sockets. This fixes breakage seen on
716 too-old kernels or those not configured for Fast Open, at the cost of
717 requiring both directions being enabled for TFO, and TFO never being used
718 by non-daemon-related Exim processes.
720 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
721 endings, at least on the first header line. Try to canonify any that get
722 past that check, despite the cost.
724 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
725 now limited to an arbitrary five deep, while parsing addresses with the
726 strip_excess_angle_brackets option enabled.
728 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
729 instead leave the unprompted TLS handshake in socket buffer for the
730 TLS library to consume.
732 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
734 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
736 JH/16 Drop variables when they go out of scope. Memory management drops a whole
737 region in one operation, for speed, and this leaves assigned pointers
738 dangling. Add checks run only under the testsuite which checks all
739 variables at a store-reset and panics on a dangling pointer; add code
740 explicitly nulling out all the variables discovered. Fixes one known
741 bug: a transport crash, where a dangling pointer for $sending_ip_address
742 originally assigned in a verify callout, is re-used.
744 PP/06 Drop '.' from @INC in various Perl scripts.
746 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
748 PP/08 Reduce a number of compilation warnings under clang; building with
749 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
750 should be warning-free.
752 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
754 HS/01 Fix portability problems introduced by PP/08 for platforms where
755 realloc(NULL) is not equivalent to malloc() [SunOS et al].
757 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
758 chunk. This allows us to accept broken chunked messages. We need a more
759 general solution here.
761 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
762 already-broken messages in the queue.
764 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
766 JH/19 Fix reference counting bug in routing-generated-address tracking.
772 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
773 supports it and a size is available (ie. the sending peer gave us one).
775 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
776 years of being deprecated). The replacements are the ACLs
777 acl_smtp_mime and acl_not_smtp_mime.
779 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
780 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
781 or even an in-clear connection were permitted. Now, if the host lookup
782 was dnssec and dane was requested then the host is only used if the
783 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
784 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
785 if one fails this test.
786 This means that a poorly-configured remote DNS will make it incommunicado;
787 but it protects against a DNS-interception attack on it.
789 JH/04 Bug 1810: make continued-use of an open smtp transport connection
790 non-noisy when a race steals the message being considered.
792 JH/05 If main configuration option tls_certificate is unset, generate a
793 self-signed certificate for inbound TLS connections.
795 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
796 in rewrites and routers.
798 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
799 and logged a warning sing 4.83; now they are a configuration file error.
801 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
802 (lacking @domain). Apply the same qualification processing as RCPT.
804 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
806 JH/10 Support ${sha256:} applied to a string (as well as the previous
809 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
810 a cutthrough deliver is pending, as we always want to make a connection.
811 This also avoids re-routing the message when later placing the cutthrough
812 connection after a verify cache hit.
813 Do not update it with the verify result either.
815 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
816 when routing results in more than one destination address.
818 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
819 signing (which inhibits the cutthrough capability). Previously only
820 the presence of an option was tested; now an expansion evaluating as
821 empty is permissible (obviously it should depend only on data available
822 when the cutthrough connection is made).
824 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
825 the relevant preceding SMTP command did not note the pipelining mode.
827 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
828 Previously they were not counted.
830 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
831 as one having no matching records. Previously we deferred the message
832 that needed the lookup.
834 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
835 distinguished as "(=".
837 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
838 for missing MX records. Previously it only worked for missing A records.
840 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
842 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
843 after the data-go-ahead and data-ack. Patch from Jason Betts.
845 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
846 even for a "none" policy. Patch from Tony Meyer.
848 JH/22 Fix continued use of a connection for further deliveries. If a port was
849 specified by a router, it must also match for the delivery to be
852 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
853 When one of the recipients of a message was unsuitable for the connection
854 (has no matching addresses), we lost track of needing to mark it
855 deferred. As a result mail would be lost.
857 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
859 JH/25 Decoding ACL controls is now done using a binary search; the source code
860 takes up less space and should be simpler to maintain. Merge the ACL
861 condition decode tables also, with similar effect.
863 JH/26 Fix problem with one_time used on a redirect router which returned the
864 parent address unchanged. A retry would see the parent address marked as
865 delivered, so not attempt the (identical) child. As a result mail would
868 JH/27 Fix a possible security hole, wherein a process operating with the Exim
869 UID can gain a root shell. Credit to http://www.halfdog.net/ for
870 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
873 JH/28 Enable {spool,log} filesystem space and inode checks as default.
874 Main config options check_{log,spool}_{inodes,space} are now
875 100 inodes, 10MB unless set otherwise in the configuration.
877 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
878 Previously it only applied to the main-section connection policy
881 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
883 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
884 by me. Added RFC7919 DH primes as an alternative.
886 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
887 are not in the system include path.
889 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
890 GnuTLS, when a session startup failed (eg because the client disconnected)
891 Exim did stdio operations after fclose. This was exposed by a recent
892 change which nulled out the file handle after the fclose.
894 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
895 signed directly by the cert-signing cert, rather than an intermediate
896 OCSP-signing cert. This is the model used by LetsEncrypt.
898 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
900 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
901 an incoming connection.
903 HS/02 Bug 1802: Do not half-close the connection after sending a request
906 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
907 fallback to "prime256v1".
909 JH/34 SECURITY: Use proper copy of DATA command in error message.
910 Could leak key material. Remotely exploitable. CVE-2016-9963.
916 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
917 and 3.4.4 - once the server is enabled to respond to an OCSP request
918 it does even when not requested, resulting in a stapling non-aware
919 client dropping the TLS connection.
921 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
922 support variable-length bit vectors. No functional change.
924 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
925 The I= interface field on outgoing lines is now after the H= remote
926 host field, same as incoming lines. There is a separate
927 outgoing_interface log selector which allows you to disable the
930 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
931 If not running log_selector +smtp_connection the mainlog would be held
932 open indefinitely after a "too many connections" event, including to a
933 deleted file after a log rotate. Leave the per net connection logging
934 leaving it open for efficiency as that will be quickly detected by the
935 check on the next write.
937 HS/01 Bug 1671: Fix post transport crash.
938 Processing the wait-<transport> messages could crash the delivery
939 process if the message IDs didn't exist for some reason. When
940 using 'split_spool_directory=yes' the construction of the spool
941 file name failed already, exposing the same netto behaviour.
943 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
944 mime_regex ACL conditions.
946 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
947 to DSN fail messages (bounces): remote IP, remote greeting, remote response
948 to HELO, local diagnostic string.
950 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
951 log line to debug. Even when configured with a tls authenticator many
952 client connections are expected to not authenticate in this way, so
953 an authenticate fail is not an error.
955 HS/02 Add the Exim version string to the process info. This way exiwhat
956 gives some more detail about the running daemon.
958 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
959 matter for fast-change records such as DNSBLs.
961 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
962 retry record, even if constant. There may be multiple transports with
963 different interface settings and the retry behaviour needs to be kept
966 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
968 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
970 JH/10 Bug 840: fix log_defer_output option of pipe transport
972 JH/11 Bug 830: use same host for all RCPTS of a message, even under
973 hosts_randomize. This matters a lot when combined with mua_wrapper.
975 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
976 ${quote_pgsql:<string>} operator.
978 JH/13 Bug 1708: avoid misaligned access in cached lookup.
980 JH/14 Change header file name for freeradius-client. Relevant if compiling
981 with Radius support; from the Gentoo tree and checked under Fedora.
983 JH/15 Bug 1712: Introduce $prdr_requested flag variable
985 JH/16 Bug 1714: Permit an empty string as expansion result for transport
986 option transport_filter, meaning no filtering.
988 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
990 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
991 defaults to "*" (all hosts). The variable is now available when not built
992 with TLS, default unset, mainly to enable keeping the testsuite sane.
993 If a server certificate is not supplied (via tls_certificate) an error is
994 logged, and clients will find TLS connections fail on startup. Presumably
995 they will retry in-clear.
996 Packagers of Exim are strongly encouraged to create a server certificate
997 at installation time.
999 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1000 with the $config_file variable.
1002 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1003 in transport context, after the attempt, and per-recipient. The latter type
1004 is per host attempted. The event data is the error message, and the errno
1005 information encodes the lookup type (A vs. MX) used for the (first) host,
1006 and the trailing two digits of the smtp 4xx response.
1008 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1009 to write to mainlog (or rejectlog, paniclog) in the window between file
1010 creation and permissions/ownership being changed. Particularly affects
1011 installations where exicyclog is run as root, rather than exim user;
1012 result is that the running daemon panics and dies.
1014 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1016 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1017 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1018 "pri" and "weight". Note that the previous implicit priority given by the
1019 list order is no longer honoured.
1021 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1022 for DKIM processing.
1024 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1025 by defining SUPPORT_SOCKS.
1027 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1028 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1029 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1030 variables are renamed to proxy_{local,external}_{address,port}.
1032 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1033 for a build by defining SUPPORT_I18N
1035 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1036 of the query string, and make ${quote_redis:} do that quoting.
1038 JH/29 Move Events support from Experimental to mainline, enabled by default
1039 and removable for a build by defining DISABLE_EVENT.
1041 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1043 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1044 cached by the daemon.
1046 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1047 by defining LOOKUP_REDIS. The libhiredis library is required.
1049 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1050 keys are given for lookup.
1052 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1053 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1054 only supported when built with TLS support. The PolarSSL SHA routines
1055 are still used when the TLS library is too old for convenient support.
1057 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1058 openssl_options), for security. OpenSSL forces this from version 1.1.0
1059 server-side so match that on older versions.
1061 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1062 allocation for $value could be released as the expansion processing
1063 concluded, but leaving the global pointer active for it.
1065 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1066 and to use the domains and local_parts ACL conditions.
1068 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1069 incorrectly not doubled on cutthrough transmission, hence seen as a
1070 body-termination at the receiving system - resulting in truncated mails.
1071 Commonly the sender saw a TCP-level error, and retransmitted the message
1072 via the normal store-and-forward channel. This could result in duplicates
1073 received - but deduplicating mailstores were liable to retain only the
1074 initial truncated version.
1076 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1078 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1080 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1081 we're in there, support oversigning also; bug 1309.
1083 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1085 HS/04 Add support for keep_environment and add_environment options.
1087 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1088 either intentional arithmetic overflow during PRNG, or testing config-
1091 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1092 delivery resulted in actual delivery. Cancel cutthrough before DATA
1095 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1096 rejects a recipient: pass the reject to the originator.
1098 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1099 Many were false-positives and ignorable, but it's worth fixing the
1102 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1103 for the new environment-manipulation done at startup. Move the routines
1104 from being local to tls.c to being global via the os.c file.
1106 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1107 an extract embedded as result-arg for a map, the first arg for extract
1108 is unavailable so we cannot tell if this is a numbered or keyed
1109 extraction. Accept either.
1115 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1118 JH/02 The smtp transport option "multi_domain" is now expanded.
1120 JH/03 The smtp transport now requests PRDR by default, if the server offers
1123 JH/04 Certificate name checking on server certificates, when exim is a client,
1124 is now done by default. The transport option tls_verify_cert_hostnames
1125 can be used to disable this per-host. The build option
1126 EXPERIMENTAL_CERTNAMES is withdrawn.
1128 JH/05 The value of the tls_verify_certificates smtp transport and main options
1129 default to the word "system" to access the system default CA bundle.
1130 For GnuTLS, only version 3.0.20 or later.
1132 JH/06 Verification of the server certificate for a TLS connection is now tried
1133 (but not required) by default. The verification status is now logged by
1134 default, for both outbound TLS and client-certificate supplying inbound
1137 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1140 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1141 Status Notification (bounce) messages are now MIME format per RFC 3464.
1142 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1143 under the control of the dsn_advertise_hosts option, and routers may
1144 have a dsn_lasthop option.
1146 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1147 default, modifiable by a malware= option. The list separator for
1148 the options can now be changed in the usual way. Bug 68.
1150 JH/10 The smtp_receive_timeout main option is now expanded before use.
1152 JH/11 The incoming_interface log option now also enables logging of the
1153 local interface on delivery outgoing connections.
1155 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1156 if the interface and destination host and port all match.
1158 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1161 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1162 Patch from Andrew Lewis.
1164 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1165 now supports optional time-restrictions, weighting, and priority
1166 modifiers per server. Patch originally by <rommer@active.by>.
1168 JH/16 The spamd_address main option now supports a mixed list of local
1169 and remote servers. Remote servers can be IPv6 addresses, and
1170 specify a port-range.
1172 JH/17 Bug 68: The spamd_address main option now supports an optional
1173 timeout value per server.
1175 JH/18 Bug 1581: Router and transport options headers_add/remove can
1176 now have the list separator specified.
1178 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1181 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1184 JH/21 Support for the A6 type of dns record is withdrawn.
1186 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1187 rather than the verbs used.
1189 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1190 from 255 to 1024 chars.
1192 JH/24 Verification callouts now attempt to use TLS by default.
1194 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1195 are generic router options now. The defaults didn't change.
1197 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1198 Original patch from Alexander Shikoff, worked over by JH.
1200 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1201 files if ZCAT_COMMAND is not executable.
1203 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1205 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1207 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1208 Normally benign, it bites when the pair was led to by a CNAME;
1209 modern usage is to not canonicalize the domain to a CNAME target
1210 (and we were inconsistent anyway for A-only vs AAAA+A).
1212 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1214 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1215 when evaluating $sender_host_dnssec.
1217 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1218 $sender_helo_dnssec variable.
1220 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1222 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1224 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1226 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1227 documented as working, but never had. Support all but $spam_report.
1229 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1230 added for tls authenticator.
1232 HS/03 Add perl_taintmode main config option
1238 TL/01 When running the test suite, the README says that variables such as
1239 no_msglog_check are global and can be placed anywhere in a specific
1240 test's script, however it was observed that placement needed to be near
1241 the beginning for it to behave that way. Changed the runtest perl
1242 script to read through the entire script once to detect and set these
1243 variables, reset to the beginning of the script, and then run through
1244 the script parsing/test process like normal.
1246 TL/02 The BSD's have an arc4random API. One of the functions to induce
1247 adding randomness was arc4random_stir(), but it has been removed in
1248 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1249 function when detected.
1251 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1252 cause callback expansion.
1254 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1255 syntax errors in an expansion can be treated as a string instead of
1256 logging or causing an error, due to the internal use of bool_lax
1257 instead of bool when processing it.
1259 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1260 server certificates when making smtp deliveries.
1262 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1264 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1266 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1268 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1269 Merged patch from Sebastian Wiedenroth.
1271 JH/05 Fix results-pipe from transport process. Several recipients, combined
1272 with certificate use, exposed issues where response data items split
1273 over buffer boundaries were not parsed properly. This eventually
1274 resulted in duplicates being sent. This issue only became common enough
1275 to notice due to the introduction of connection certificate information,
1276 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1278 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1279 size buffer was used, resulting in syntax errors when an expansion
1282 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1283 version 3.3.6 or later.
1285 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1286 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1287 both become "event_action", the variables become $event_name, $event_data
1288 and $event_defer_errno. There is a new variable $verify_mode, usable in
1289 routers, transports and related events. The tls:cert event is now also
1290 raised for inbound connections, if the main configuration event_action
1293 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1294 early OCSP support, but no stapling (appears to be less than 1.0.0).
1296 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1297 server certificate names available under the smtp transport option
1298 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1301 JH/10 Time-related extraction expansions from certificates now use the main
1302 option "timezone" setting for output formatting, and are consistent
1303 between OpenSSL and GnuTLS compilations. Bug 1541.
1305 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1306 encoded parameter in the incoming message. Bug 1558.
1308 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1309 include certificate info, eximon was claiming there were spoolfile
1312 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1314 JH/14 Log delivery-related information more consistently, using the sequence
1315 "H=<name> [<ip>]" wherever possible.
1317 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1318 are problematic for Debian distribution, omit them from the release
1321 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1323 JH/16 Fix string representation of time values on 64bit time_t architectures.
1326 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1327 output list separator was used.
1332 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1333 checkers that were complaining about end of non-void function with no
1336 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1337 This was a regression introduced in 4.83 by another bugfix.
1339 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1341 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1342 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1348 TF/01 Correctly close the server side of TLS when forking for delivery.
1350 When a message was received over SMTP with TLS, Exim failed to clear up
1351 the incoming connection properly after forking off the child process to
1352 deliver the message. In some situations the subsequent outgoing
1353 delivery connection happened to have the same fd number as the incoming
1354 connection previously had. Exim would try to use TLS and fail, logging
1355 a "Bad file descriptor" error.
1357 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1358 utilities have not been installed.
1360 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1361 temporary space as the ACL may create new global variables.
1363 TL/01 LDAP support uses per connection or global context settings, depending
1364 upon the detected version of the libraries at build time.
1366 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1367 to extract and use the src ip:port in logging and expansions as if it
1368 were a direct connection from the outside internet. PPv2 support was
1369 updated based on HAProxy spec change in May 2014.
1371 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1373 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1374 Properly escape header and check for NULL return.
1376 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1379 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1381 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1382 characters in header names, implemented as a verify condition.
1383 Contributed by Michael Fischer v. Mollard.
1385 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1386 results permerror and temperror. Previous values are deprecated but
1387 still accepted. In a future release, err_perm and err_temp will be
1388 completely removed, which will be a backward incompatibility if the
1389 ACL tests for either of these two old results. Patch contributed by
1390 user bes-internal on the mailing list.
1392 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1394 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1395 selectors, in both main and reject logs.
1397 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1400 JH/07 Add malware type "sock" for talking to simple daemon.
1402 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1404 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1405 routers/transports under cutthrough routing.
1407 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1408 numbers. Touch up "bool" conditional to keep the same definition.
1410 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1412 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1414 JH/12 Expand items in router/transport headers_add or headers_remove lists
1415 individually rather than the list as a whole. Bug 1452.
1417 Required for reasonable handling of multiple headers_ options when
1418 they may be empty; requires that headers_remove items with embedded
1419 colons must have them doubled (or the list-separator changed).
1421 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1422 view the policy declared in the DMARC record. Currently, $dmarc_status
1423 is a combined value of both the record presence and the result of the
1426 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1428 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1429 dnslookup router and the smtp transport (applying to the forward
1432 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1433 of ldap servers used for a specific lookup. Patch provided by Heiko
1436 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1437 New variable $lookup_dnssec_authenticated for observability.
1439 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1440 Patch submitted by Lars Timman.
1442 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1444 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1445 Requires trusted mode and valid format message id, aborts otherwise.
1446 Patch contributed by Heiko Schlichting.
1448 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1449 certextract with support for various fields. Bug 1358.
1451 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1452 is requested by default, modifiable by smtp transport option
1455 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1456 operate on certificate variables to give certificate fingerprints
1457 Also new ${sha256:cert_variable}.
1459 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1461 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1462 Christian Aistleitner.
1464 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1466 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1467 file. Patch from Wolfgang Breyha.
1469 JH/25 Expand the coverage of the delivery $host and $host_address to
1470 client authenticators run in verify callout. Bug 1476.
1472 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1473 align with daemon_smtp_ports. Bug 72.
1475 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1476 support and error reporting did not work properly.
1478 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1479 and is readable. Patch from Andrew Colin Kissa.
1481 TL/14 Enhance documentation of ${run expansion and how it parses the
1482 commandline after expansion, particularly in the case when an
1483 unquoted variable expansion results in an empty value.
1485 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1487 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1488 by renaming away from it. Addresses GH issue 15, reported by
1491 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1493 TL/15 SECURITY: prevent double expansion in math comparison functions
1494 (can expand unsanitized data). Not remotely exploitable.
1501 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1503 PP/02 Make -n do something, by making it not do something.
1504 When combined with -bP, the name of an option is not output.
1506 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1509 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1510 $sender_host_name and config options to manage this, and basic check
1513 PP/05 DSCP support for outbound connections and control modifier for inbound.
1515 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1516 (Only plugin which currently uses this is kerberos4, which nobody should
1517 be using, but we should make it available and other future plugins might
1518 conceivably use it, even though it would break NAT; stuff *should* be
1519 using channel bindings instead).
1521 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1522 name; added for Sendmail compatibility; requires admin caller.
1523 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1524 just ignore it); requires trusted caller.
1525 Also parse but ignore: -Ac -Am -X<logfile>
1528 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1530 TL/02 Add +smtp_confirmation as a default logging option.
1532 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1533 Patch by Magnus Holmgren from 2007-02-20.
1535 TL/04 Bugzilla 1281 - Spec typo.
1536 Bugzilla 1283 - Spec typo.
1537 Bugzilla 1290 - Spec grammar fixes.
1539 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1541 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1543 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1544 mailing list by by Dmitry Isaikin.
1546 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1548 JH/02 Support "G" suffix to numbers in ${if comparisons.
1550 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1552 NM/01 Bugzilla 1197 - Spec typo
1553 Bugzilla 1196 - Spec examples corrections
1555 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1557 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1558 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1561 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1562 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1564 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1565 "acl {{name}{arg}...}", and optional args on acl condition
1568 JH/05 Permit multiple router/transport headers_add/remove lines.
1570 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1572 JH/07 Avoid using a waiting database for a single-message-only transport.
1573 Performance patch from Paul Fisher. Bugzilla 1262.
1575 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1578 JH/09 Add $headers_added variable, with content from use of ACL modifier
1579 add_header (but not yet added to the message). Bugzilla 199.
1581 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1582 Pulled from Bugzilla 817 by Wolfgang Breyha.
1584 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1586 (nb: this is the same fix as in Exim 4.80.1)
1588 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1591 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1594 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1596 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1597 advertise SMTP AUTH mechanism to us, instead of a generic
1598 protocol violation error. Also, make Exim more robust to bad
1599 data from the Dovecot auth socket.
1601 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1603 When a queue runner is handling a message, Exim first routes the
1604 recipient addresses, during which it prunes them based on the retry
1605 hints database. After that it attempts to deliver the message to
1606 any remaining recipients. It then updates the hints database using
1609 So if a recipient address works intermittently, it can get repeatedly
1610 deferred at routing time. The retry hints record remains fresh so the
1611 address never reaches the final cutoff time.
1613 This is a fairly common occurrence when a user is bumping up against
1614 their storage quota. Exim had some logic in its local delivery code
1615 to deal with this. However it did not apply to per-recipient defers
1616 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1618 This change adds a proper retry rule check during routing so that the
1619 final cutoff time is checked against the message's age. We only do
1620 this check if there is an address retry record and there is not a
1621 domain retry record; this implies that previous attempts to handle
1622 the address had the retry_use_local_parts option turned on. We use
1623 this as an approximation for the destination being like a local
1624 delivery, as in LMTP.
1626 I suspect this new check makes the old local delivery cutoff check
1627 redundant, but I have not verified this so I left the code in place.
1629 TF/02 Correct gecos expansion when From: is a prefix of the username.
1631 Test 0254 submits a message to Exim with the header
1635 When I ran the test suite under the user fanf2, Exim expanded
1636 the header to contain my full name, whereas it should have added
1637 a Resent-Sender: header. It erroneously treats any prefix of the
1638 username as equal to the username.
1640 This change corrects that bug.
1642 GF/01 DCC debug and logging tidyup
1643 Error conditions log to paniclog rather than rejectlog.
1644 Debug lines prefixed by "DCC: " to remove any ambiguity.
1646 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1648 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1649 Bug spotted by Jeremy Harris; was flawed since initial commit.
1650 Would have resulted in OCSP responses post-SNI triggering an Exim
1651 NULL dereference and crash.
1653 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1655 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1656 Bug detection, analysis and fix by Samuel Thibault.
1657 Bugzilla 1331, Debian bug #698092.
1659 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1661 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1662 Server implementation by Todd Lyons, client by JH.
1663 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1664 config variable "prdr_enable" controls whether the server
1665 advertises the facility. If the client requests PRDR a new
1666 acl_data_smtp_prdr ACL is called once for each recipient, after
1667 the body content is received and before the acl_smtp_data ACL.
1668 The client is controlled by both of: a hosts_try_prdr option
1669 on the smtp transport, and the server advertisement.
1670 Default client logging of deliveries and rejections involving
1671 PRDR are flagged with the string "PRDR".
1673 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1674 fclose(). Diagnosis by Todd Lyons.
1676 PP/17 Update configure.default to handle IPv6 localhost better.
1677 Patch by Alain Williams (plus minor tweaks).
1680 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1681 This is now consistent with GnuTLS, and is now documented: the
1682 previous undocumented portable approach to treating the option as
1683 unset was to force an expansion failure. That still works, and
1684 an empty string is now equivalent.
1686 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1687 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1688 not performing validation itself.
1690 PP/20 Added force_command boolean option to pipe transport.
1691 Patch from Nick Koston, of cPanel Inc.
1693 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1696 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1698 PP/21 Fix eximon continuous updating with timestamped log-files.
1699 Broken in a format-string cleanup in 4.80, missed when I repaired the
1700 other false fix of the same issue.
1701 Report and fix from Heiko Schlichting.
1704 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1705 Report from Prashanth Katuri.
1707 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1708 It's SecureTransport, so affects any MacOS clients which use the
1709 system-integrated TLS libraries, including email clients.
1711 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1712 using a MIME ACL for non-SMTP local injection.
1713 Report and assistance in diagnosis by Warren Baker.
1715 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1717 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1719 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1720 last id that failed so it may be referenced in subsequent ACL's.
1722 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1725 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1726 ldap library initialization, allowing self-signed CA's to be
1727 used. Also properly sets require_cert option later in code by
1728 using NULL (global ldap config) instead of ldap handle (per
1729 session). Bug diagnosis and testing by alxgomz.
1731 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1732 the src/util/ subdirectory.
1734 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1735 renamed to Transport Post Delivery Action by Jeremy Harris, as
1738 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1739 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1740 redis_servers = needs to be configured which will be used by the redis
1741 lookup. Patch from Warren Baker, of The Packet Hub.
1743 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1745 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1746 hostname or reverse DNS when processing a host list. Used suggestions
1747 from multiple comments on this bug.
1749 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1751 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1752 Missed a few lines, added it to make the runtest require no keyboard
1755 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1756 contains upper case chars. Make router use caseful_local_part.
1758 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1759 support when GnuTLS has been built with p11-kit.
1765 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1767 This, or similar/improved, will also be change PP/11 of 4.82.
1773 PP/01 Handle short writes when writing local log-files.
1774 In practice, only affects FreeBSD (8 onwards).
1775 Bugzilla 1053, with thanks to Dmitry Isaikin.
1777 NM/01 Bugzilla 949 - Documentation tweak
1779 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1782 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1784 PP/02 Implemented gsasl authenticator.
1786 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1788 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1789 `pkg-config foo` for cflags/libs.
1791 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1792 with rest of GSASL and with heimdal_gssapi.
1794 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1795 `pkg-config foo` for cflags/libs for the TLS implementation.
1797 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1798 properties get this fed in as external SSF. A number of robustness
1799 and debugging improvements to the cyrus_sasl authenticator.
1801 PP/08 cyrus_sasl server now expands the server_realm option.
1803 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1804 Patch by Jeremy Harris.
1806 PP/10 Added dbmjz lookup type.
1808 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1810 PP/12 MAIL args handles TAB as well as SP, for better interop with
1811 non-compliant senders.
1812 Analysis and variant patch by Todd Lyons.
1814 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1815 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1816 Patch from Dirk Mueller <dmueller@suse.com>
1818 PP/13 tls_peerdn now print-escaped for spool files.
1819 Observed some $tls_peerdn in wild which contained \n, which resulted
1820 in spool file corruption.
1822 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1823 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1824 or write after TLS renegotiation, which otherwise led to messages
1827 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1828 as a tracking header (ie: a signed header comes before the signature).
1829 Patch from Wolfgang Breyha.
1831 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1832 comma-sep list; embedded commas doubled.
1834 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1836 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1838 Report and patch from Dmitry Banschikov.
1840 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1841 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1842 failures. We appear to now support TLS1.1+ with Exim.
1844 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1845 lets Exim select keys and certificates based upon TLS SNI from client.
1846 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1847 before an outbound SMTP session. New log_selector, +tls_sni.
1849 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1850 NULL dereference. Report and patch from Alun Jones.
1852 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1853 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1854 Not seeing resolver debug output on NetBSD, but suspect this is a
1855 resolver implementation change.
1857 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1858 Left warnings. Added "eximon gdb" invocation mode.
1860 PP/21 Defaulting "accept_8bitmime" to true, not false.
1862 PP/22 Added -bw for inetd wait mode support.
1864 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1865 locate the relevant includes and libraries. Made this the default.
1867 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1868 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1870 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1871 This may cause build issues on older platforms.
1873 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1874 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1875 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1876 Added SNI support via GnuTLS too.
1877 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1879 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1881 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1882 Applied second patch from Janne, implementing suggestion to default
1883 multiple-strings-in-record handling to match SPF spec.
1885 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1887 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1888 read-only, out of scope).
1889 Patch from Wolfgang Breyha, report from Stuart Northfield.
1891 PP/29 Fix three issues highlighted by clang analyser static analysis.
1892 Only crash-plausible issue would require the Cambridge-specific
1893 iplookup router and a misconfiguration.
1894 Report from Marcin Mirosław.
1896 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1898 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1899 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1900 As part of this, removing so much warning spew let me fix some minor
1901 real issues in debug logging.
1903 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1904 assignment on my part. Fixed.
1906 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1907 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1908 Janne Snabb (who went above and beyond: thank you).
1910 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1911 string otherwise requires a connection and a bunch more work and it's
1912 relatively easy to get wrong. Should also expose TLS library linkage
1915 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1916 64-bit ${eval} (JH/03).
1918 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1919 GNU libc to support some of the 64-bit stuff, should not lead to
1920 conflicts. Defined before os.h is pulled in, so if a given platform
1921 needs to override this, it can.
1923 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1924 protection layer was required, which is not implemented.
1925 Bugzilla 1254, patch from Wolfgang Breyha.
1927 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1928 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1929 tls_dhparam take prime identifiers. Also unbreak combination of
1930 OpenSSL+DH_params+TLSSNI.
1932 PP/39 Disable SSLv2 by default in OpenSSL support.
1938 PP/01 Solaris build fix for Oracle's LDAP libraries.
1939 Bugzilla 1109, patch from Stephen Usher.
1941 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1943 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1946 TF/02 Fix a couple more cases where we did not log the error message
1947 when unlink() failed. See also change 4.74-TF/03.
1949 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1950 lock up or crash if it happened to be inside a call to libc when it
1951 got a SIGUSR1 from exiwhat.
1953 The SIGUSR1 handler appends the current process status to the process
1954 log which is later printed by exiwhat. It used to use the general
1955 purpose logging code to do this, but several functions it calls are
1956 not safe for signals.
1958 The new output code in the SIGUSR1 handler is specific to the process
1959 log, and simple enough that it's easy to inspect for signal safety.
1960 Removing some special cases also simplifies the general logging code.
1961 Removing the spurious timestamps from the process log simplifies
1964 TF/04 Improved ratelimit ACL condition.
1966 The /noupdate option has been deprecated in favour of /readonly which
1967 has clearer semantics. The /leaky, /strict, and /readonly update modes
1968 are mutually exclusive. The update mode is no longer included in the
1969 database key; it just determines when the database is updated. (This
1970 means that when you upgrade Exim will forget old rate measurements.)
1972 Exim now checks that the per_* options are used with an update mode that
1973 makes sense for the current ACL. For example, when Exim is processing a
1974 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1975 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1976 must specify per_mail/readonly. If you omit the update mode it defaults to
1977 /leaky where that makes sense (as before) or /readonly where required.
1979 The /noupdate option is now undocumented but still supported for
1980 backwards compatibility. It is equivalent to /readonly except that in
1981 ACLs where /readonly is required you may specify /leaky/noupdate or
1982 /strict/noupdate which are treated the same as /readonly.
1984 A useful new feature is the /count= option. This is a generalization
1985 of the per_byte option, so that you can measure the throughput of other
1986 aggregate values. For example, the per_byte option is now equivalent
1987 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1989 The per_rcpt option has been generalized using the /count= mechanism
1990 (though it's more complicated than the per_byte equivalence). When it is
1991 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1992 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1993 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1994 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1995 Note that using per_rcpt with a non-readonly update mode in more than
1996 one ACL will cause the recipients to be double-counted. (The per_mail
1997 and per_byte options don't have this problem.)
1999 The handling of very low rates has changed slightly. If the computed rate
2000 is less than the event's count (usually one) then this event is the first
2001 after a long gap. In this case the rate is set to the same as this event's
2002 count, so that the first message of a spam run is counted properly.
2004 The major new feature is a mechanism for counting the rate of unique
2005 events. The new per_addr option counts the number of different
2006 recipients that someone has sent messages to in the last time period. It
2007 behaves like per_rcpt if all the recipient addresses are different, but
2008 duplicate recipient addresses do not increase the measured rate. Like
2009 the /count= option this is a general mechanism, so the per_addr option
2010 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2011 example, measure the rate that a client uses different sender addresses
2012 with the options per_mail/unique=$sender_address. There are further
2013 details in the main documentation.
2015 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2017 TF/06 Removed a few PCRE remnants.
2019 TF/07 Automatically extract Exim's version number from tags in the git
2020 repository when doing development or release builds.
2022 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2023 Bugzilla 879. Patch from Paul Fisher.
2025 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2026 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2029 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2031 PP/05 Variable $av_failed, true if the AV scanner deferred.
2032 Bugzilla 1078. Patch from John Horne.
2034 PP/06 Stop make process more reliably on build failure.
2035 Bugzilla 1087. Patch from Heiko Schlittermann.
2037 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2038 Bugzilla 1089. Patch from Heiko Schlittermann.
2040 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2041 Bugzilla 1131. Patch from Holger Weiß.
2043 PP/09 Handle IPv6 addresses with SPF.
2044 Bugzilla 860. Patch from Wolfgang Breyha.
2046 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2048 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2051 PP/11 match_* no longer expand right-hand-side by default.
2052 New compile-time build option, EXPAND_LISTMATCH_RHS.
2053 New expansion conditions, "inlist", "inlisti".
2055 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2057 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2059 PP/14 fix log_write() format string regression from TF/03.
2060 Bugzilla 1152. Patch from Dmitry Isaikin.
2066 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2068 PP/02 Harmonised TLS library version reporting; only show if debugging.
2069 Layout now matches that introduced for other libraries in 4.74 PP/03.
2071 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2073 PP/04 New "dns_use_edns0" global option.
2075 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2078 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2079 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2081 TK/01 Updated PolarSSL code to 0.14.2.
2082 Bugzilla 1097. Patch from Andreas Metzler.
2084 PP/07 Catch divide-by-zero in ${eval:...}.
2085 Fixes bugzilla 1102.
2087 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2090 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2091 format-string attack -- SECURITY: remote arbitrary code execution.
2093 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2094 time unintentionally subject to list matching rules, letting the header
2095 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2096 arbitrary string expansion). This allowed for information disclosure.
2098 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2099 INT_MIN/-1 -- value coerced to INT_MAX.
2105 NM/01 Workaround for PCRE version dependency in version reporting
2108 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2109 This fixes portability to compilers other than gcc, notably
2110 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2112 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2113 makefiles for portability to HP-UX and POSIX correctness.
2115 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2116 Also via indented variable definition in the Makefile.
2117 (Debugging by Oliver Heesakkers).
2119 PP/02 Restore caching of spamd results with expanded spamd_address.
2120 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2122 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2123 Improves build reliability. Fix from: Frank Elsner
2125 NM/02 Fix wide character breakage in the rfc2047 coding
2126 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2128 NM/03 Allow underscore in dnslist lookups
2129 Fixes bug 1026. Patch from Graeme Fowler
2131 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2132 Code patches from Adam Ciarcinski of NetBSD.
2134 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2137 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2138 is logged, to avoid truncation. Patch from John Horne.
2140 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2141 Patch from Jakob Hirsch.
2143 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2144 SQL string expansion failure details.
2145 Patch from Andrey Oktyabrski.
2147 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2148 Patch from Simon Arlott.
2150 PP/09 New lookups functionality failed to compile on old gcc which rejects
2151 extern declarations in function scope.
2152 Patch from Oliver Fleischmann
2154 PP/10 Use sig_atomic_t for flags set from signal handlers.
2155 Check getgroups() return and improve debugging.
2156 Fixed developed for diagnosis in bug 927 (which turned out to be
2159 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2160 Patch from Mark Zealey.
2162 PP/12 Bugzilla 1056: Improved spamd server selection.
2163 Patch from Mark Zealey.
2165 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2166 Based on patch from Heiko Schlittermann.
2168 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2169 Patch from Uwe Doering, sign-off by Michael Haardt.
2171 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2172 variable declaration deep within a block. Bug and patch from
2175 PP/15 lookups-Makefile IRIX compatibility coercion.
2177 PP/16 Make DISABLE_DKIM build knob functional.
2179 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2180 Patch by Simon Arlott
2182 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2183 variable argument macros. Our copy now differs from upstream.
2189 TF/01 Failure to get a lock on a hints database can have serious
2190 consequences so log it to the panic log.
2192 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2193 controlled using the smtp_confirmation log selector.
2195 TF/03 Include the error message when we fail to unlink a spool file.
2197 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2198 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2199 for maintaining out-of-tree patches for some time.
2201 PP/01 Bugzilla 139: Documentation and portability issues.
2202 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2203 Handle per-OS dynamic-module compilation flags.
2205 PP/02 Let /dev/null have normal permissions.
2206 The 4.73 fixes were a little too stringent and complained about the
2207 permissions on /dev/null. Exempt it from some checks.
2208 Reported by Andreas M. Kirchwitz.
2210 PP/03 Report version information for many libraries, including
2211 Exim version information for dynamically loaded libraries. Created
2212 version.h, now support a version extension string for distributors
2213 who patch heavily. Dynamic module ABI change.
2215 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2216 privilege escalation vulnerability whereby the Exim run-time user
2217 can cause root to append content of the attacker's choosing to
2220 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2223 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2224 If dropping privileges for untrusted macros, we disabled normal logging
2225 on the basis that it would fail; for the Exim run-time user, this is not
2226 the case, and it resulted in successful deliveries going unlogged.
2227 Fixed. Reported by Andreas Metzler.
2233 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2234 only prepend for the Resent-* case. Fixes regression introduced in
2235 Exim 4.70 by NM/22 for Bugzilla 607.
2237 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2238 increasing numbers of administrators be bitten by this.
2240 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2242 PP/03 Bugzilla 994: added openssl_options main configuration option.
2244 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2246 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2248 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2250 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2251 without a peer certificate, leading to a segfault because of an
2252 assumption that peers always have certificates. Be a little more
2253 paranoid. Problem reported by Martin Tscholak.
2255 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2256 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2257 NB: ClamAV planning to remove STREAM in "middle of 2010".
2258 CL also introduces -bmalware, various -d+acl logging additions and
2259 more caution in buffer sizes.
2261 PP/09 Implemented reverse_ip expansion operator.
2263 PP/10 Bugzilla 937: provide a "debug" ACL control.
2265 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2267 PP/12 Bugzilla 973: Implement --version.
2269 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2271 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2273 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2275 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2276 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2277 ignore trailing whitespace.
2279 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2281 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2284 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2285 Notification from Dr Andrew Aitchison.
2287 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2288 ExtendedDetectionInfo response format.
2289 Notification from John Horne.
2291 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2294 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2295 XSL and documented dependency on system catalogs, with examples of how
2298 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2301 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2302 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2303 configuration file which is writeable by the Exim user or group.
2305 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2306 of configuration files to cover files specified with the -C option if
2307 they are going to be used with root privileges, not just the default
2310 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2311 option (effectively making it always true).
2313 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2314 files to be used while preserving root privileges.
2316 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2317 that rogue child processes cannot use them.
2319 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2320 run-time user, instead of root.
2322 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2323 Exim run-time user without dropping privileges.
2325 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2326 result string, instead of calling string_vformat() twice with the same
2329 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2330 for other users. Others should always drop root privileges if they use
2331 -C on the command line, even for a whitelisted configure file.
2333 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2335 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2341 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2342 $data_path, and $header_path variables; fixed documentation bugs and
2345 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2346 exipick to access non-standard spools, including the "frozen" queue
2349 NM/01 Bugzilla 965: Support mysql stored procedures.
2350 Patch from Alain Williams
2352 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2354 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2355 Patch from Andreas Metzler
2357 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2358 Patch from Kirill Miazine
2360 NM/05 Bugzilla 671: Added umask to procmail example.
2362 JJ/03 installed exipick 20100323.0, fixing doc bug
2364 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2365 directory. Notification and patch from Dan Rosenberg.
2367 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2369 TK/02 Improve log output when DKIM signing operation fails.
2371 MH/01 Treat the transport option dkim_domain as a colon separated
2372 list, not as a single string, and sign the message with each element,
2373 omitting multiple occurences of the same signer.
2375 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2376 Bugzilla 985, 986. Patch by Simon Arlott
2378 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2379 Patch by Simon Arlott
2381 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2382 MBX locking. Notification from Dan Rosenberg.
2388 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2390 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2392 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2394 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2396 NM/04 Bugzilla 915: Flag broken perl installation during build.
2402 TK/01 Added patch by Johannes Berg that expands the main option
2403 "spamd_address" if it starts with a dollar sign.
2405 TK/02 Write list of recipients to X-Envelope-Sender header when building
2406 the mbox-format spool file for content scanning (suggested by Jakob
2409 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2410 (http://www.dcc-servers.net/) support via dccifd. Activated by
2411 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2413 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2414 by Mark Daniel Reidel <mr@df.eu>.
2416 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2417 When building exim an external PCRE library is now needed -
2418 PCRE is a system library on the majority of modern systems.
2419 See entry on PCRE_LIBS in EDITME file.
2421 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2422 conversation. Added nologin parameter to request.
2423 Patch contributed by Kirill Miazine.
2425 TF/01 Do not log submission mode rewrites if they do not change the address.
2427 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2429 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2430 log files in place. Contributed by Roberto Lima.
2432 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2434 TF/03 Bugzilla 615: When checking the local_parts router precondition
2435 after a local_part_suffix or local_part_prefix option, Exim now
2436 does not use the address's named list lookup cache, since this
2437 contains cached lookups for the whole local part.
2439 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2440 Robert Millan. Documentation is in experimental-spec.txt.
2442 TF/04 Bugzilla 668: Fix parallel build (make -j).
2444 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2446 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2447 Patch provided by Jan Srzednicki.
2449 TF/05 Leading white space used to be stripped from $spam_report which
2450 wrecked the formatting. Now it is preserved.
2452 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2453 that they are available at delivery time.
2455 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2457 TF/08 TLS error reporting now respects the incoming_interface and
2458 incoming_port log selectors.
2460 TF/09 Produce a more useful error message if an SMTP transport's hosts
2461 setting expands to an empty string.
2463 NM/06 Bugzilla 744: EXPN did not work under TLS.
2464 Patch provided by Phil Pennock.
2466 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2467 Patch provided by Richard Godbee.
2469 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2470 acl_smtp_notquit, added index entry.
2472 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2473 Patch provided by Eugene Bujak.
2475 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2476 accept(). Patch provided by Maxim Dounin.
2478 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2479 Patch provided by Phil Pennock.
2481 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2483 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2484 Patch provided by Brad "anomie" Jorsch.
2486 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2487 Patch provided by Dean Brooks.
2489 TK/05 Add native DKIM support (does not depend on external libraries).
2491 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2492 Patch provided by Graeme Fowler.
2494 NM/16 Bugzilla 851: Documentation example syntax fix.
2496 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2498 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2501 NM/19 Bugzilla 745: TLS version reporting.
2502 Patch provided by Phil Pennock.
2504 NM/20 Bugzilla 167: bool: condition support.
2505 Patch provided by Phil Pennock.
2507 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2508 clients. Patch provided by Phil Pennock.
2510 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2511 Patch provided by Brad "anomie" Jorsch.
2513 NM/23 Bugzilla 687: Fix misparses in eximstats.
2514 Patch provided by Heiko Schlittermann.
2516 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2517 Patch provided by Heiko Schlittermann.
2519 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2520 plus update to original patch.
2522 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2524 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2525 Patch provided by David Brownlee.
2527 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2529 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2531 NM/30 Bugzilla 888: TLS documentation bugfixes.
2533 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2535 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2536 Unlike the original bugzilla I have changed all shell scripts in src tree.
2538 NM/33 Bugzilla 898: Transport filter timeout fix.
2539 Patch by Todd Rinaldo.
2541 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2542 Patch by Serge Demonchaux.
2544 NM/35 Bugzilla 39: Base64 decode bug fixes.
2545 Patch by Jakob Hirsch.
2547 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2549 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2551 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2553 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2559 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2560 ALT-N's libdkim that I have put here:
2561 http://duncanthrax.net/exim-experimental/
2563 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2564 were called 'true' and it seems that C99 defines that as a reserved
2565 keyword to be used with 'bool' variable types. That means you could
2566 not include C99-style headers which use bools without triggering
2567 build errors in sieve.c.
2569 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2570 as mailq or other aliases. Changed the --help handling significantly
2571 to do whats expected. exim_usage() emits usage/help information.
2573 SC/01 Added the -bylocaldomain option to eximstats.
2575 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2577 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2579 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2585 PH/01 Another patch from the Sieve maintainer.
2587 PH/02 When an IPv6 address is converted to a string for single-key lookup
2588 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2589 dots are used instead of colons so that keys in lsearch files need not
2590 contain colons. This was done some time before quoting was made available
2591 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2592 (notated using the quote facility) so as to distinguish them from IPv4
2593 keys. This meant that lookups for IP addresses in host lists did not work
2594 for iplsearch lookups.
2596 This has been fixed by arranging for IPv6 addresses to be expressed with
2597 colons if the lookup type is iplsearch. This is not incompatible, because
2598 previously such lookups could never work.
2600 The situation is now rather anomalous, since one *can* have colons in
2601 ordinary lsearch keys. However, making the change in all cases is
2602 incompatible and would probably break a number of configurations.
2604 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2607 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2608 conversion specification without a maximum field width, thereby enabling
2609 a rogue spamd server to cause a buffer overflow. While nobody in their
2610 right mind would setup Exim to query an untrusted spamd server, an
2611 attacker that gains access to a server running spamd could potentially
2612 exploit this vulnerability to run arbitrary code as the Exim user.
2614 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2615 $primary_hostname instead of what libspf2 thinks the hosts name is.
2617 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2618 a directory entry by the name of the lookup key. Previously, if a
2619 symlink pointed to a non-existing file or a file in a directory that
2620 Exim lacked permissions to read, a lookup for a key matching that
2621 symlink would fail. Now it is enough that a matching directory entry
2622 exists, symlink or not. (Bugzilla 503.)
2624 PH/03 The body_linecount and body_zerocount variables are now exported in the
2627 PH/04 Added the $dnslist_matched variable.
2629 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2630 This means they are set thereafter only if the connection becomes
2633 PH/06 Added the client_condition to authenticators so that some can be skipped
2634 by clients under certain conditions.
2636 PH/07 The error message for a badly-placed control=no_multiline_responses left
2637 "_responses" off the end of the name.
2639 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2641 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2642 (without spaces) instead of just copying the configuration text.
2644 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2646 PH/11 Added $max_received_linelength.
2648 PH/12 Added +ignore_defer and +include_defer to host lists.
2650 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2651 way in which PCRE > 7.0 is built.
2653 PH/14 Implemented queue_only_load_latch.
2655 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2656 MAIL command. The effect was to mangle the value on 64-bit systems.
2658 PH/16 Another patch from the Sieve maintainer.
2660 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2662 PH/18 If a system quota error occurred while trying to create the file for
2663 a maildir delivery, the message "Mailbox is full" was not appended to the
2664 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2665 only to a quota excession during the actual writing of the file.
2667 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2668 characters?) which causes problems in log lines. The DN values are now
2669 passed through string_printing() before being added to log lines.
2671 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2672 and InterBase are left for another time.)
2674 PH/21 Added message_body_newlines option.
2676 PH/22 Guard against possible overflow in moan_check_errorcopy().
2678 PH/23 POSIX allows open() to be a macro; guard against that.
2680 PH/24 If the recipient of an error message contained an @ in the local part
2681 (suitably quoted, of course), incorrect values were put in $domain and
2682 $local_part during the evaluation of errors_copy.
2688 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2689 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2692 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2693 issue a MAIL command.
2695 PH/02 In an ACL statement such as
2697 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2699 if a client was not listed at all, or was listed with a value other than
2700 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2701 the condition was not true (as it should be), so access was not denied.
2702 The bug was that the ! inversion was incorrectly passed on to the second
2703 item. This has been fixed.
2705 PH/03 Added additional dnslists conditions == and =& which are different from
2706 = and & when the dns lookup returns more than one IP address.
2708 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2709 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2711 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2712 FSYNC, which compiles an option called disable_fsync that allows for
2713 bypassing fsync(). The documentation is heavily laced with warnings.
2715 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2717 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2718 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2719 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2720 including adding "make clean"; (3) Added -fPIC when compiling the test
2721 dynamically loaded module, to get rid of a warning.
2723 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2724 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2725 = 0s. The bug is otherwise harmless.
2727 PH/07 There was a bug in the dovecot authenticator such that the value of
2728 $auth1 could be overwritten, and so not correctly preserved, after a
2729 successful authentication. This usually meant that the value preserved by
2730 the server_setid option was incorrect.
2732 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2734 PH/09 Installed PCRE release 7.0.
2736 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2737 run for batched SMTP input. It is now run at the start of every message
2738 in the batch. While fixing this I discovered that the process information
2739 (output by running exiwhat) was not always getting set for -bs and -bS
2740 input. This is fixed, and it now also says "batched" for BSMTP.
2742 PH/11 Added control=no_pipelining.
2744 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2745 patch, slightly modified), and move the expansion of helo_data till after
2746 the connection is made in the smtp transport (so it can use these
2749 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2751 PH/14 Added log_selector = +pid.
2753 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2755 PH/16 Add ${if forany and ${if forall.
2757 PH/17 Added dsn_from option to vary the From: line in DSNs.
2759 PH/18 Flush SMTP output before performing a callout, unless control =
2760 no_callout_flush is set.
2762 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2763 was true (the default) a successful delivery failed to delete the retry
2764 item, thus causing premature timeout of the address. The bug is now
2767 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2769 PH/21 Long custom messages for fakedefer and fakereject are now split up
2770 into multiline responses in the same way that messages for "deny" and
2771 other ACL rejections are.
2773 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2774 with slight modification.
2776 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2777 draft, changing the syntax and factoring some duplicate code".
2779 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2780 for deliveries of the second and subsequent messages over the same SMTP
2783 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2784 ${reduce, with only minor "tidies".
2786 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2788 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2789 expansion side effects.
2791 PH/27 When a message times out after an over-quota error from an Exim-imposed
2792 quota, the bounce message says "mailbox is full". This message was not
2793 being given when it was a system quota that was exceeded. It now should
2796 MH/03 Made $recipients available in local_scan(). local_scan() already has
2797 better access to the recipient list through recipients_list[], but
2798 $recipients can be useful in postmaster-provided expansion strings.
2800 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2801 in the case of a MAIL command with additional options following the
2802 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2803 were accidentally chopped off.
2805 PH/29 SMTP synchronization checks are implemented when a command is read -
2806 there is a check that no more input is waiting when there shouldn't be
2807 any. However, for some commands, a delay in an ACL can mean that it is
2808 some time before the response is written. In this time, more input might
2809 arrive, invalidly. So now there are extra checks after an ACL has run for
2810 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2811 pipelining has not been advertised.
2813 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2815 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2816 returned in the SMTP response when smtp_return_error_details was false.
2817 This has been fixed.
2819 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2820 instead of the C I/O that was originally supplied, because problems were
2821 reported on Solaris.
2823 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2824 Exim which did not show up earlier: it was assuming that a call to
2825 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2826 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2827 was a macro that became an assignment, so it seemed to work. This has
2828 changed to a proper function call with a void return, hence the compile
2829 error. Exim's code has been fixed.
2831 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2834 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2836 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2838 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2839 because it turns out to be too big or there is a timeout) there is no
2840 "Completed" line in the log. When some messages of this type were
2841 selected by exigrep, they were listed as "not completed". Others were
2842 picked up by some special patterns. I have improved the selection
2843 criteria to be more general.
2845 PH/38 The host_find_failed option in the manualroute router can now be set
2846 to "ignore", to completely ignore a host whose IP address cannot be
2847 found. If all hosts are ignored, the behaviour is controlled by the new
2848 host_all_ignored option.
2850 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2851 homing or because of multiple MX records with /mx) generated more than
2852 one IP address, and the following item turned out to be the local host,
2853 all the secondary addresses of the first item were incorrectly removed
2854 from the list, along with the local host and any following hosts (which
2855 is what is supposed to happen).
2857 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2858 whoever called Exim into the -H file. In the case of the daemon it was
2859 behaving confusingly. When first started, it used values for whoever
2860 started the daemon, but after a SIGHUP it used the Exim user (because it
2861 calls itself on a restart). I have changed the code so that it now always
2864 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2865 message are rejected with the same error (e.g. no authentication or bad
2866 sender address), and a DATA command is nevertheless sent (as can happen
2867 with PIPELINING or a stupid MUA), the error message that was given to the
2868 RCPT commands is included in the rejection of the DATA command. This is
2869 intended to be helpful for MUAs that show only the final error to their
2872 PH/42 Another patch from the Sieve maintainer.
2874 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2875 Eximstats - Fixed some broken HTML links and added missing column headers
2877 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2878 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2880 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2882 PH/43 Yet another patch from the Sieve maintainer.
2884 PH/44 I found a way to check for a TCP/IP connection going away before sending
2885 the response to the final '.' that terminates a message, but only in the
2886 case where the client has not sent further data following the '.'
2887 (unfortunately, this is allowed). However, in many cases there won't be
2888 any further data because there won't be any more messages to send. A call
2889 to select() can be used: if it shows that the input is "ready", there is
2890 either input waiting, or the socket has been closed. An attempt to read
2891 the next input character can distinguish the two cases. Previously, Exim
2892 would have sent an OK response which the client would never have see.
2893 This could lead to message repetition. This fix should cure that, at
2894 least in a lot of common cases.
2896 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2897 advertised in response to EHLO.
2903 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2904 fixed by 4.65/MH/01 (is this a record?) are fixed:
2906 (i) An empty string was always treated as zero by the numeric comparison
2907 operators. This behaviour has been restored.
2909 (ii) It is documented that the numeric comparison operators always treat
2910 their arguments as decimal numbers. This was broken in that numbers
2911 starting with 0 were being interpreted as octal.
2913 While fixing these problems I realized that there was another issue that
2914 hadn't been noticed. Values of message_size_limit (both the global option
2915 and the transport option) were treated as octal if they started with 0.
2916 The documentation was vague. These values are now always treated as
2917 decimal, and I will make that clear in the documentation.
2923 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2924 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2927 MH/01 Don't check that the operands of numeric comparison operators are
2928 integers when their expansion is in "skipping" mode (fixes bug
2929 introduced by 4.64-PH/07).
2931 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2932 child addresses, Exim now panics and dies. Previously, because the count
2933 is held in a short int, deliveries were likely to be lost. As such a
2934 large number of recipients for a single message is ridiculous
2935 (performance will be very, very poor), I have chosen to impose a limit
2936 rather than extend the field.
2942 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2943 leftover -K file (the existence of which was triggered by #402).
2944 While we were at it, introduced process PID as part of the -K
2945 filename. This should rule out race conditions when creating
2948 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2949 processing considerably. Previous code took too long for large mails,
2950 triggering a timeout which in turn triggers #401.
2952 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2953 in the DK code in transports.c. sendfile() is not really portable,
2954 hence the _LINUX specificness.
2956 TF/01 In the add_headers option to the mail command in an Exim filter,
2957 there was a bug that Exim would claim a syntax error in any
2958 header after the first one which had an odd number of characters
2961 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2962 callout verification, Exim cached a "reject" for the entire domain. This
2963 is correct for most verifications, but it is not correct for a recipient
2964 verification with use_sender or use_postmaster set, because in that case
2965 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2966 case of MAIL FROM:<> rejection from other early rejections (e.g.
2967 rejection of HELO). When verifying a recipient using a non-null MAIL
2968 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2969 Whatever the result of the callout, the value of the domain cache is
2970 left unchanged (for any other kind of callout, getting as far as trying
2971 RCPT means that the domain itself is ok).
2973 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2976 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2977 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2978 session, the daemon ignores ECONNECT errors and logs others; it now
2979 ignores EPIPE as well.
2981 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2982 (quoted-printable decoding).
2984 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2985 later the small subsequent patch to fix an introduced bug.
2987 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2989 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2991 PH/08 An error is now given if message_size_limit is specified negative.
2993 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2994 to be given (somewhat) arbitrary names.
2996 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2999 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3000 miscellaneous code fixes
3002 PH/10 Added the log_reject_target ACL modifier to specify where to log
3005 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3006 hostname. This is wrong, because it relates to the incoming message (and
3007 probably the interface on which it is arriving) and not to the outgoing
3008 callout (which could be using a different interface). This has been
3009 changed to use the value of the helo_data option from the smtp transport
3010 instead - this is what is used when a message is actually being sent. If
3011 there is no remote transport (possible with a router that sets up host
3012 addresses), $smtp_active_hostname is used.
3014 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3015 tweaks were necessary in order to get it to work (see also 21 below):
3016 (a) The code assumed that strncpy() returns a negative number on buffer
3017 overflow, which isn't the case. Replaced with Exim's string_format()
3019 (b) There were several signed/unsigned issues. I just did the minimum
3020 hacking in of casts. There is scope for a larger refactoring.
3021 (c) The code used strcasecmp() which is not a standard C function.
3022 Replaced with Exim's strcmpic() function.
3023 (d) The code set only $1; it now sets $auth1 as well.
3024 (e) A simple test gave the error "authentication client didn't specify
3025 service in request". It would seem that Dovecot has changed its
3026 interface. Fortunately there's a specification; I followed it and
3027 changed what the client sends and it appears to be working now.
3029 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3032 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3033 address A is aliased to B and C, where B exists and C does not. Without
3034 -v the output is "A verified" because verification stops after a
3035 successful redirection if more than one address is generated. However,
3036 with -v the child addresses are also verified. Exim was outputting "A
3037 failed to verify" and then showing the successful verification for C,
3038 with its parentage. It now outputs "B failed to verify", showing B's
3039 parentage before showing the successful verification of C.
3041 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3042 look up a TXT record in a specific list after matching in a combined
3045 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3046 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3047 they consult the DNS. I had assumed they would set it the way they
3048 wanted; and indeed my experiments on Linux seem to show that in some
3049 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3050 To be on the safe side, however, I have now made the interface to
3051 host_find_byname() similar to host_find_bydns(), with an argument
3052 containing the DNS resolver options. The host_find_byname() function now
3053 sets these options at its start, just as host_find_bydns() does. The smtp
3054 transport options dns_qualify_single and dns_search_parents are passed to
3055 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3056 of host_find_byname() use the default settings of RES_DEFNAMES
3057 (qualify_single) but not RES_DNSRCH (search_parents).
3059 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3060 spool_read_header() do less string testing, by means of a preliminary
3061 switch on the second character of optional "-foo" lines. (This is
3062 overdue, caused by the large number of possibilities that now exist.
3063 Originally there were few.) While I was there, I also converted the
3064 str(n)cmp tests so they don't re-test the leading "-" and the first
3065 character, in the hope this might squeeze out yet more improvement.
3067 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3068 flag allowing group syntax was set by the header_syntax check but not
3069 turned off, possible causing trouble later; (2) The flag was not being
3070 set at all for the header_verify test, causing "group"-style headers to
3071 be rejected. I have now set it in this case, and also caused header_
3072 verify to ignore an empty address taken from a group. While doing this, I
3073 came across some other cases where the code for allowing group syntax
3074 while scanning a header line wasn't quite right (mostly, not resetting
3075 the flag correctly in the right place). These bugs could have caused
3076 trouble for malformed header lines. I hope it is now all correct.
3078 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3079 with the "reply" argument non-NULL. The code, however (which originally
3080 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3081 but it didn't always do it. This confused somebody who was copying the
3082 code for some other use. I have removed all the tests.
3084 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3085 feature that was used to support insecure browsers during the U.S. crypto
3086 embargo. It requires special client support, and Exim is probably the
3087 only MTA that supported it -- and would never use it because real RSA is
3088 always available. This code has been removed, because it had the bad
3089 effect of slowing Exim down by computing (never used) parameters for the
3090 RSA_EXPORT functionality.
3092 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3093 authenticator to fail if there's a tab character in the incoming data
3094 (there should never be unless someone is messing about, as it's supposed
3095 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3096 if the connection is using TLS or if the remote IP is the same as the
3097 local IP, and the "valid-client-cert option" if a client certificate has
3100 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3101 authenticators. This can be used for authorization after authentication
3102 succeeds. (In the case of plaintext, it servers for both authentication
3105 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3106 if any retry times were supplied.
3108 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3109 connection, where there is no client IP address to check. In this
3110 situation, the verify now always succeeds.
3112 PH/25 Applied John Jetmore's -Mset patch.
3114 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3116 PH/27 In a string expansion for a processed (not raw) header when multiple
3117 headers of the same name were present, leading whitespace was being
3118 removed from all of them, but trailing whitespace was being removed only
3119 from the last one. Now trailing whitespace is removed from each header
3120 before concatenation. Completely empty headers in a concatenation (as
3121 before) are ignored.
3123 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3124 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3126 PH/29 [Removed. This was a change that I later backed out, and forgot to
3127 correct the ChangeLog entry (that I had efficiently created) before
3128 committing the later change.]
3130 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3131 address errors (4xx response to RCPT) over the same connection as other
3132 messages routed to the same hosts. Such deliveries are always "forced",
3133 so retry times are not inspected. This resulted in far too many retries
3134 for the affected addresses. The effect occurred only when there were more
3135 hosts than the hosts_max_try setting in the smtp transport when it had
3136 the 4xx errors. Those hosts that it had tried were not added to the list
3137 of hosts for which the message was waiting, so if all were tried, there
3138 was no problem. Two fixes have been applied:
3140 (i) If there are any address or message errors in an SMTP delivery, none
3141 of the hosts (tried or untried) are now added to the list of hosts
3142 for which the message is waiting, so the message should not be a
3143 candidate for sending over the same connection that was used for a
3144 successful delivery of some other message. This seems entirely
3145 reasonable: after all the message is NOT "waiting for some host".
3146 This is so "obvious" that I'm not sure why it wasn't done
3147 previously. Hope I haven't missed anything, but it can't do any
3148 harm, as the worst effect is to miss an optimization.
3150 (ii) If, despite (i), such a delivery is accidentally attempted, the
3151 routing retry time is respected, so at least it doesn't keep
3152 hammering the server.
3154 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3155 in ${readsocket because some servers need this prod.
3157 PH/32 Added some extra debug output when updating a wait-xxx database.
3159 PH/33 The hint "could be header name not terminated by colon", which has been
3160 given for certain expansion errors for a long time, was not being given
3161 for the ${if def:h_colon_omitted{... case.
3163 PH/34 The spec says: "With one important exception, whenever a domain list is
3164 being scanned, $domain contains the subject domain." There was at least
3165 one case where this was not true.
3167 PH/35 The error "getsockname() failed: connection reset by peer" was being
3168 written to the panic log as well as the main log, but it isn't really
3169 panic-worthy as it just means the connection died rather early on. I have
3170 removed the panic log writing for the ECONNRESET error when getsockname()
3173 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3174 runs only) independently of the message's sender address. This meant
3175 that, if the 4xx error was in fact related to the sender, a different
3176 message to the same recipient with a different sender could confuse
3177 things. In particular, this can happen when sending to a greylisting
3178 server, but other circumstances could also provoke similar problems.
3179 I have changed the default so that the retry time for these errors is now
3180 based a combination of the sender and recipient addresses. This change
3181 can be overridden by setting address_retry_include_sender=false in the
3184 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3185 remote server are returned as part of bounce messages. This was not
3186 happening for LMTP over a pipe (the lmtp transport), but now it is the
3187 same for both kinds of LMTP.
3189 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3190 in header lines that were in fact CNAMEs. This is no longer the case.
3192 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3193 and queue runs started by the daemon processed all messages. This has
3194 been fixed so that -R and -S can now usefully be given with -q<time>.
3196 PH/40 Import PCRE release 6.7 (fixes some bugs).
3198 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3200 PH/42 Give an error if -q is specified more than once.
3202 PH/43 Renamed the variables $interface_address and $interface_port as
3203 $received_ip_address and $received_port, to make it clear that these
3204 values apply to message reception, and not to the outgoing interface when
3205 a message is delivered. (The old names remain recognized, of course.)
3207 PH/44 There was no timeout on the connect() call when using a Unix domain
3208 socket in the ${readsocket expansion. There now is.
3210 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3211 be meaningful with "accept".
3213 SC/01 Eximstats V1.43
3214 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3216 SC/02 Eximstats V1.44
3217 Use a glob alias rather than an array ref in the generated
3218 parser. This improves both readability and performance.
3220 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3221 Collect SpamAssassin and rejection statistics.
3222 Don't display local sender or destination tables unless
3223 there is data to show.
3224 Added average volumes into the top table text output.
3226 SC/04 Eximstats V1.46
3227 Collect data on the number of addresses (recipients)
3228 as well as the number of messages.
3230 SC/05 Eximstats V1.47
3231 Added 'Message too big' to the list of mail rejection
3232 reasons (thanks to Marco Gaiarin).
3234 SC/06 Eximstats V1.48
3235 Mainlog lines which have GMT offsets and are too short to
3236 have a flag are now skipped.
3238 SC/07 Eximstats V1.49 (Alain Williams)
3239 Added the -emptyok flag.
3241 SC/08 Eximstats V1.50
3242 Fixes for obtaining the IP address from reject messages.
3244 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3245 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3246 whitespace changes from 4.64-PH/27
3248 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3251 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3252 are found, allow negative numbers in numeric criteria)
3254 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3256 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3257 to match changes made in 4.64-PH/43
3259 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3261 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3262 "domain" is actually an IP address, and force a failure. This locks out
3263 those revolvers/nameservers that support "A-for-A" lookups, in
3264 contravention of the specifications.
3266 PH/48 When a host name was looked up from an IP address, and the subsequent
3267 forward lookup of the name timed out, the host name was left in
3268 $sender_host_name, contrary to the specification.
3270 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3271 restricted to single-key lookups, Exim was not diagnosing an error if
3272 * or *@ was used with a query-style lookup.
3274 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3276 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3277 long ago, but noone interested enough thought of it. Let's just say that
3278 the "1.1" means that there are some new functions that weren't there at
3279 some point in the past.
3281 PH/51 Error processing for expansion failure of helo_data from an smtp
3282 transport during callout processing was broken.
3284 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3285 tested/used via the -bh/-bhc/-bs options.
3287 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3288 bug, fixed in subsequent PCRE releases).
3290 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3291 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3293 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3299 SC/01 Use a glob alias rather than an array ref in eximstats generated
3300 parser. This improves both readability and performance.
3302 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3303 Don't display local sender or destination tables in eximstats unless
3304 there is data to show.
3305 Added average volumes into the eximstats top table text output.
3307 SC/03 Collect data on the number of addresses (recipients) as well
3308 as the number of messages in eximstats.
3310 TF/01 Correct an error in the documentation for the redirect router. Exim
3311 does (usually) call initgroups() when daemonizing.
3313 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3314 with consistent privilege compared to when running as a daemon.
3316 TF/03 Note in the spec that $authenticated_id is not set for local
3317 submissions from trusted users.
3319 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3320 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3322 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3323 by adding some example configuration directives to the default
3324 configuration file. A little bit of work is required to uncomment the
3325 directives and define how usernames and passwords are checked, but
3326 there is now a framework to start from.
3328 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3329 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3330 without this. I don't know how relevant this is to other LDAP libraries.
3332 PH/02 Add the verb name to the "unknown ACL verb" error.
3334 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3336 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3338 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3339 directory not expanded when it should be if an expanded home directory
3340 was set for the address (which is overridden by the transport).
3342 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3345 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3346 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3347 because it is too late at that time, and has no effect.
3349 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3350 security issue with \' (bugzilla #107). I could not use the
3351 PQescapeStringConn() function, because it needs a PGconn value as one of
3354 PH/08 When testing addresses using -bt, indicate those final addresses that
3355 are duplicates that would not cause an additional delivery. At least one
3356 person was confused, thinking that -bt output corresponded to deliveries.
3357 (Suppressing duplicates isn't a good idea as you lose the information
3358 about possibly different redirections that led to the duplicates.)
3360 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3361 systems where poll() doesn't work, in particular OS X.
3363 PH/10 Added more information to debugging output for retry time not reached.
3365 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3366 operations in malware.c.
3368 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3371 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3372 syslog_duplication set false, log lines that would normally be written
3373 both the the main log and to the reject log were not written to syslog at
3376 PH/14 In the default configuration, change the use of "message" in ACL warn
3377 statements to "add_header".
3379 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3380 not followed by a command (e.g. "seen endif").
3382 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3383 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3386 PH/17 Added extra conditions to the default value of delay_warning_condition
3390 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3391 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3392 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3395 The Auto-Submitted: and various List- headers are standardised, whereas I
3396 don't think Precedence: ever was.
3398 PH/18 Refactored debugging code in route_finduser() to show more information,
3399 in particular, the error code if getpwnam() issues one.
3401 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3402 This is apparently needed in addition to the PH/07 change above to avoid
3403 any possible encoding problems.
3405 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3406 but not after initializing Perl.
3408 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3409 output them only if debugging. By default they are written stderr,
3410 apparently, which is not desirable.
3412 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3415 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3418 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3420 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3421 authenticated or an ident call has been made. Suppress the default
3422 values for $authenticated_id and $authenticated_sender (but permit -oMai
3423 and -oMas) when testing with -bh.
3425 PH/24 Re-jigged the order of the tests in the default configuration so that the
3426 tests for valid domains and recipients precede the DNS black list and CSA
3427 tests, on the grounds that those ones are more expensive.
3429 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3430 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3431 This bug exists in every version of Exim that I still have, right back to
3434 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3435 However, an attempt to turn on case-sensitivity in a regex key by
3436 including (?-i) didn't work because the subject string was already
3437 lowercased, and the effects were non-intuitive. It turns out that a
3438 one-line patch can be used to allow (?-i) to work as expected.
3444 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3445 other effects) broke the use of negated acl sub-conditions.
3447 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3450 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3451 "Deny" causes Exim to reject the incoming connection with a 554 error.
3452 Unfortunately, if there is a major crisis, such as a disk failure,
3453 tcp-wrappers gives "deny", whereas what one would like would be some
3454 kind of temporary error. A kludge has been added to help with this.
3455 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3456 554 error is used if errno is still zero or contains ENOENT (which occurs
3457 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3460 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3462 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3463 errors. Otherwise a message that provokes a temporary error (when other
3464 messages do not) can cause a whole host to time out.
3466 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3467 addresses were routed directly to files or pipes from a redirect router.
3468 File deliveries just didn't batch; pipe deliveries might have suffered
3471 PH/06 A failure to get a lock for a hints database would erroneously always say
3472 "Failed to get write lock", even when it was really a read lock.
3474 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3475 of 0600. This has been changed to use the value of the lockfile_mode
3476 option (which defaults to 0600).
3478 PH/08 Applied small patch from the Sieve maintainer.
3480 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3481 folder from quota calculations, a direct delivery into this folder messed
3482 up the contents of the maildirsize file. This was because the regex was
3483 used only to exclude .Trash (or whatever) when the size of the mailbox
3484 was calculated. There was no check that a delivery was happening into an
3485 excluded directory. This bug has been fixed by ignoring all quota
3486 processing for deliveries into excluded directories.
3488 PH/10 Added the maildirfolder_create_regex option to appendfile.
3494 PH/01 The code for finding all the local interface addresses on a FreeBSD
3495 system running IPv6 was broken. This may well have applied to all BSD
3496 systems, as well as to others that have similar system calls. The broken
3497 code found IPv4 interfaces correctly, but gave incorrect values for the
3498 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3499 that it would not match correctly against @[] and not recognize the IPv6
3502 PH/02 The ipliteral router was not recognizing addresses of the form user@
3503 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3505 PH/03 Added disable_ipv6.
3507 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3508 decoded form, because it is most often used to construct To: headers
3509 lines in autoreplies, and the decoded form may well be syntactically
3510 invalid. However, $reply_address has leading white space removed, and all
3511 newlines turned into spaces so that the autoreply transport does not
3514 PH/05 If group was specified without a user on a router, and no group or user
3515 was specified on a transport, the group from the router was ignored.
3517 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3518 for visible compile-time settings that can be used to change these
3519 numbers, for those that want even more. Backwards compatibility with old
3520 spool files has been maintained. However, going back to a previous Exim
3521 release will lost any variables that are in spool files.
3523 PH/07 Two small changes when running in the test harness: increase delay when
3524 passing a TCP/IP connection to a new process, in case the original
3525 process has to generate a bounce, and remove special handling of
3526 127.0.0.2 (sic), which is no longer necessary.
3528 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3529 be the same on different OS.
3531 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3534 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3535 whether --show-vars was specified or not
3537 JJ/02 exipick: Added support for new ACL variable spool format introduced
3540 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3541 syntactically invalid From: or Reply-to: line, and a filter used this to
3542 generate an autoreply, and therefore failed to obtain an address for the
3543 autoreply, Exim could try to deliver to a non-existent relative file
3544 name, causing unrelated and misleading errors. What now happens is that
3545 it logs this as a hard delivery error, but does not attempt to create a
3548 PH/11 The exinext utility has a -C option for testing purposes, but although
3549 the given file was scanned by exinext itself; it wasn't being passed on
3550 when Exim was called.
3552 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3553 an end-of-file indication when reading a command response.
3555 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3556 compiled. In many other places in Exim, IPv6 addresses are always
3557 recognized, so I have changed this. It also means that IPv4 domain
3558 literals of the form [IPV4:n.n.n.n] are now always recognized.
3560 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3561 used if the router is not running as root, for example, when verifying at
3562 ACL time, or when using -bh. The debugging output from this situation was
3563 non-existent - all you got was a failure to exec. I have made two
3566 (a) Failures to set uid/gid, the current directory, or a process leader
3567 in a subprocess such as that created by queryprogram now generate
3568 suitable debugging output when -d is set.
3570 (b) The queryprogram router detects when it is not running as root,
3571 outputs suitable debugging information if -d is set, and then runs
3572 the subprocess without attempting to change uid/gid.
3574 PH/15 Minor change to Makefile for building test_host (undocumented testing
3577 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3578 additional section of a DNS packet that returns MX or SRV records.
3579 Instead, it always explicitly searches for A/AAAA records. This avoids
3580 major problems that occur when a DNS server includes only records of one
3581 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3582 fixed another bug: if SRV records were looked up and the corresponding
3583 address records were *not* found in the additional section, the port
3584 values from the SRV records were lost.
3586 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3587 using the correct key (the original address) when searching the retry
3588 rules in order to find which one to use for generating the retry hint.
3590 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3591 adding the default one. Similarly, if it contains a Reply-To: header, the
3592 errors_reply_to option, if set, is not used.
3594 PH/19 When calculating a retry time, Exim used to measure the "time since
3595 failure" by looking at the "first failed" field in the retry record. Now
3596 it does not use this if it is later than than the arrival time of the
3597 message. Instead it uses the arrival time. This makes for better
3598 behaviour in cases where some deliveries succeed, thus re-setting the
3599 "first failed" field. An example is a quota failure for a huge message
3600 when small messages continue to be delivered. Without this change, the
3601 "time since failure" will always be short, possible causing more frequent
3602 delivery attempts for the huge message than are intended.
3603 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3605 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3606 $1, $2, $3) because the numerical variables can be reset during some
3607 expansion items (e.g. "match"), thereby losing the authentication data.
3609 PH/21 Make -bV show the size of off_t variables so that the test suite can
3610 decide whether to run tests for quotas > 2G.
3612 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3613 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3614 filecount value is greater than 2G or if a quota value is greater than 2G
3615 on a system where the size of off_t is not greater than 4, a panic error
3618 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3619 never match. The debug and -bh output now contains an explicit error
3620 message indicating a malformed IPv4 address or mask.
3622 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3623 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3624 PH/23 above applies.
3626 PH/25 Do not write to syslog when running in the test harness. The only
3627 occasion when this arises is a failure to open the main or panic logs
3628 (for which there is an explicit test).
3630 PH/26 Added the /no_tell option to "control=freeze".
3632 PH/27 If a host name lookup failed very early in a connection, for example, if
3633 the IP address matched host_lookup and the reverse lookup yielded a name
3634 that did not have a forward lookup, an error message of the form "no IP
3635 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3636 could be logged. Now it outputs the IP address instead of "NULL".
3638 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3639 allows the sender and the authenticated sender to be set when
3640 submitting a message from within Exim. Since child_open_exim() is
3641 documented for local_scan(), the new function should be too.
3643 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3644 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3645 results in an empty string is now treated as unset.
3647 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3649 PH/31 Added sender_verify_fail logging option.
3651 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3652 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3653 tidied the source and removed it altogether.
3655 PH/33 When a queue run was abandoned because the load average was too high, a
3656 log line was always written; now it is written only if the queue_run log
3657 selector is set. In addition, the log line for abandonment now contains
3658 information about the queue run such as the pid. This is always present
3659 in "start" and "stop" lines but was omitted from the "abandon" line.
3661 PH/34 Omit spaces between a header name and the colon in the error message that
3662 is given when verify = headers_syntax fails (if there are lots of them,
3663 the message gets confusing).
3665 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3666 names, as there are now some PTR records that contain slashes. This check
3667 is only to protect against broken name servers that fall over on strange
3668 characters, so the fact that it applies to all lookups doesn't matter.
3670 PH/36 Now that the new test suite is complete, we can remove some of the
3671 special code in Exim that was needed for the old test suite. For example,
3672 sorting DNS records because real resolvers return them in an arbitrary
3673 order. The new test suite's fake resolver always returns records in the
3676 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3677 bounces) except when queue_only is set, to avoid logging races between
3678 the different processes.
3680 PH/38 Panic-die if .include specifies a non-absolute path.
3682 PH/39 A tweak to the "H" retry rule from its user.
3684 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3685 a label. They prevented compilation on older perls.
3687 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3688 a warning to be raised on newish perls.
3690 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3691 on queue. Changes to match documented behaviour of showing count of
3692 messages matching specified criteria.
3694 PH/40 Changed the default ident timeout from 30s to 5s.
3696 PH/41 Added support for the use of login_cap features, on those BSD systems
3697 that have them, for controlling the resources used by pipe deliveries.
3699 PH/42 The content-scanning code uses fopen() to create files in which to put
3700 message data. Previously it was not paying any attention to the mode of
3701 the files. Exim runs with umask(0) because the rest of the code creates
3702 files with open(), and sets the required mode explicitly. Thus, these
3703 files were ending up world-writeable. This was not a big issue, because,
3704 being within the spool directory, they were not world-accessible. I have
3705 created a function called modefopen, which takes an additional mode
3706 argument. It sets umask(777), creates the file, chmods it to the required
3707 mode, then resets the umask. All the relevant calls to fopen() in the
3708 content scanning code have been changed to use this function.
3710 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3711 to 24 hours. This avoids potential overflow problems when processing G
3712 and H retry rules. I suspect nobody ever tinkers with this value.
3714 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3716 PH/45 When the plaintext authenticator is running as a client, the server's
3717 challenges are checked to ensure they are valid base64 strings. By
3718 default, the authentication attempt is cancelled if an invalid string is
3719 received. Setting client_ignore_invalid_base64 true ignores these errors.
3720 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3721 they are received. Thus, the responses can be made to depend on the
3722 challenges. If an invalid string is ignored, an empty string is placed in
3725 PH/46 Messages that are created by the autoreply transport now contains a
3726 References: header, in accordance with RFCs 2822 and 3834.
3728 PH/47 Added authenticated_sender_force to the smtp transport.
3730 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3732 PH/49 Installed latest patch from the Sieve maintainer.
3734 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3735 was also set, the appendfile transport was unnecessarily scanning a
3736 directory of message files (e.g. for maildir delivery) to find the count
3737 of files (along with the size), even though it did not need this
3738 information. It now does the scan only if it needs to find either the
3739 size of the count of files.
3741 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3743 PH/52 Two bugs concerned with error handling when the smtp transport is
3746 (i) Exim was not creating retry information for temporary errors given
3747 for individual recipients after the DATA command when the smtp transport
3748 was used in LMTP mode. This meant that they could be retried too
3749 frequently, and not timed out correctly.
3751 (ii) Exim was setting the flag that allows error details to be returned
3752 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3753 recipients that were returned after the DATA command.
3755 PH/53 This is related to PH/52, but is more general: for any failing address,
3756 when detailed error information was permitted to be returned to the
3757 sender, but the error was temporary, then after the final timeout, only
3758 "retry timeout exceeded" was returned. Now it returns the full error as
3759 well as "retry timeout exceeded".
3761 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3762 do this, and (what is worse) MTAs that accept it.
3764 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3765 will now be deprecated.
3767 PH/56 New os.c-cygwin from the Cygwin maintainer.
3769 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3770 formats (previously only available in exim formats via -bpr, -bpru,
3771 and -bpra. Now also available in native and exiqgrep formats)
3773 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3774 with very large, slow to parse queues
3776 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3778 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3780 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3781 responses to authentication challenges, though it was showing the
3782 challenges; (ii) I've removed the CR characters from the debug output for
3785 PH/58 Allow for the insertion of a newline as well as a space when a string
3786 is turned into more than one encoded-word during RFC 2047 encoding. The
3787 Sieve code now uses this.
3789 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3790 data_4xx, lost_connection, tls_required.
3792 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3793 message was being sent as an SMTP response.
3795 PH/61 Add -l and -k options to exicyclog.
3797 PH/62 When verifying, if an address was redirected to one new address, so that
3798 verification continued, and the new address failed or deferred after
3799 having set something in $address_data, the value of $address_data was not
3800 passed back to the ACL. This was different to the case when no
3801 redirection occurred. The value is now passed back in both cases.
3803 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3804 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3805 use login_cap.h, so on its own it isn't the distinguishing feature. The
3806 new name refers directly to the setclassresources() function.
3808 PH/65 Added configuration files for NetBSD3.
3810 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3812 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3813 is preferred over IPv4.
3815 PH/68 The bounce_return_message and bounce_return_body options were not being
3816 honoured for bounces generated during the reception of non-SMTP messages.
3817 In particular, this applied to messages rejected by the ACL. This bug has
3818 been fixed. However, if bounce_return_message is true and bounce_return_
3819 body is false, the headers that are returned for a non-SMTP message
3820 include only those that have been read before the error was detected.
3821 (In the case of an ACL rejection, they have all been read.)
3823 PH/69 The HTML version of the specification is now built in a directory called
3824 spec_html instead of spec.html, because the latter looks like a path with
3825 a MIME-type, and this confuses some software.
3827 PH/70 Catch two compiler warnings in sieve.c.
3829 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3830 function verify_get_ident() calls ip_connect() to connect a socket, but
3831 if the "connect()" function timed out, ip_connect() used to close the
3832 socket. However, verify_get_ident() also closes the socket later, and in
3833 between Exim writes to the log, which may get opened at this point. When
3834 the socket was closed in ip_connect(), the log could get the same file
3835 descriptor number as the socket. This naturally causes chaos. The fix is
3836 not to close the socket in ip_connect(); the socket should be closed by
3837 the function that creates it. There was only one place in the code where
3838 this was missing, in the iplookup router, which I don't think anybody now
3839 uses, but I've fixed it anyway.
3841 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3842 well as to direct DNS lookups. Otherwise the handling of names in host
3843 lists is inconsistent and therefore confusing.
3849 PH/01 Two changes to the default runtime configuration:
3851 (1) Move the checks for relay_from_hosts and authenticated clients from
3852 after to before the (commented out) DNS black list checks.
3854 (2) Add control=submission to the relay_from_hosts and authenticated
3855 clients checks, on the grounds that messages accepted by these
3856 statements are most likely to be submissions.
3858 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3860 (1) Generate an error if the third argument for the ${prvs expansion is
3863 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3866 (3) Reset the variables that are obtained from the first argument of
3867 ${prvscheck and used in the second argument before leaving the code,
3868 because their memory is reclaimed, so using them afterwards may do
3871 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3872 one (it's much easier than Tom thought :-).
3874 (5) Because of (4), we can now allow for the use of $prvscheck_result
3875 inside the third argument.
3877 PH/03 For some reason, the default setting of PATH when running a command from
3878 a pipe transport was just "/usr/bin". I have changed it to
3881 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3882 anything to be listed in the output from -bV.
3884 PH/05 When a filter generated an autoreply, the entire To: header line was
3885 quoted in the delivery log line, like this:
3887 => >A.N.Other <ano@some.domain> <original@ddress> ...
3889 This has been changed so that it extracts the operative address. There
3890 may be more than one such address. If so, they are comma-separated, like
3893 => >ano@some.domain,ona@other.domain <original@ddress> ...
3895 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3896 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3897 not being looked up in the rDNS to get a host name, Exim was showing the
3898 IP address twice in Received: lines, even though the IP addresses were
3899 identical. For example:
3901 Received: from [1.2.3.4] (helo=[1.2.3.4])
3903 However, if the real host name was known, it was omitting the HELO data
3904 if it matched the actual IP address. This has been tidied up so that it
3905 doesn't show the same IP address twice.
3907 PH/07 When both +timestamp and +memory debugging was on, the value given by
3908 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3909 called by the debug printing, thereby overwriting the timestamp buffer.
3910 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3912 PH/08 When the original message was included in an autoreply transport, it
3913 always said "this is a copy of the message, including all the headers",
3914 even if body_only or headers_only was set. It now gives an appropriate
3917 PH/09 Applied a patch from the Sieve maintainer which:
3919 o fixes some comments
3920 o adds the (disabled) notify extension core
3921 o adds some debug output for the result of if/elsif tests
3922 o points to the current vacation draft in the documentation
3923 and documents the missing references header update
3927 o fixes a bug in processing the envelope test (when testing
3928 multiple envelope elements, the last element determined the
3931 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3932 Electronic Mail") by including:
3934 Auto-submitted: auto-generated
3936 in the messages that it generates (bounce messages and others, such as
3937 warnings). In the case of bounce messages for non-SMTP messages, there was
3938 also a typo: it was using "Auto_submitted" (underscore instead of
3939 hyphen). Since every message generated by Exim is necessarily in response
3940 to another message, thes have all been changed to:
3942 Auto-Submitted: auto-replied
3944 in accordance with these statements in the RFC:
3946 The auto-replied keyword:
3948 - SHOULD be used on messages sent in direct response to another
3949 message by an automatic process,
3951 - MUST NOT be used on manually-generated messages,
3953 - MAY be used on Delivery Status Notifications (DSNs) and Message
3954 Disposition Notifications (MDNs),
3956 - MUST NOT be used on messages generated by automatic or periodic
3957 processes, except for messages which are automatic responses to
3960 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3961 to the default Received: header definition.
3963 PH/12 Added log selector acl_warn_skipped (default on).
3965 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3966 variables because (a) they are in the wrong storage pool and (b) even if
3967 they were copied, it wouldn't work properly because of the caching.
3969 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3970 checking when decoding. Apparently there are clients that generate
3971 overlong encoded strings. Why am I not surprised?
3973 PH/15 If the first argument of "${if match_address" was not empty, but did not
3974 contain an "@" character, Exim crashed. Now it writes a panic log message
3975 and treats the condition as false.
3977 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3979 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3980 extension "envelope-auth". The code is finished and in agreement with
3981 other implementations, but there is no documentation so far and in fact,
3982 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3983 not changing the active code.
3985 Print executed "if" and "elsif" statements when debugging is used. This
3986 helps a great deal to understand what a filter does.
3988 Document more things not specified clearly in RFC3028. I had all this
3989 sorted out, when out of a sudden new issues came to my mind. Oops."
3991 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3994 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3995 canonical form (as documented). However, after a host name lookup from
3996 the IP address, check_host() was doing a simple string comparison with
3997 addresses acquired from the DNS when checking that the found name did
3998 have the original IP as one of its addresses. Since any found IPv6
3999 addresses are likely to be in abbreviated form, the comparison could
4000 fail. Luckily, there already exists a function for doing the comparison
4001 by converting both addresses to binary, so now that is used instead of
4002 the text comparison.
4004 PH/20 There was another similar case to PH/19, when a complete host name was
4005 given in a host list; looking up its IP address could give an abbreviated
4006 form, whereas the current host's name might or might not be abbreviated.
4007 The same fix has been applied.
4013 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4014 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4017 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4018 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4020 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4022 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4023 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4024 Also, for "Auto-Submitted", treat anything other than "no" as
4025 non-personal, in accordance with RFC 3834. (Previously it treated
4026 anything starting "auto-" as non-personal.)
4028 TF/01 The control=submission/name=... option had a problem with syntax
4029 errors if the name included a slash character. The /name= option
4030 now slurps the rest of the string, so it can include any characters
4031 but it must come last in the list of options (after /sender_retain
4034 PH/05 Some modifications to the interface to the fake nameserver for the new
4042 TK/01 Added the "success_on_redirect" address verification option. See
4043 NewStuff for rationale and an example.
4045 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4047 PH/02 Patch to exigrep to allow it to work on syslog lines.
4049 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4050 fread() to skip over the body file's header line, because in Cygwin the
4051 header line is locked and is inaccessible.
4053 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4054 co-exist for some time) to make it clear that it is the Exim ID that is
4055 referenced, not the Message-ID: header line.
4057 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4058 string_format() function, because snprintf() does not exist on all
4061 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4062 ${stat: expansion item.
4064 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4065 protocol synchronization error", to keep the pedants happy.
4067 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4068 well as for IRIX systems, when gcc is being used. See the host.c source
4071 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4073 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4076 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4077 transport and to the smtp transport in LMTP mode.
4079 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4081 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4082 run a filter in a subprocess. This could lead to confusion in subsequent
4083 lookups in the parent process. There should also be a search_tidyup() at
4084 the end of the subprocess.
4086 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4087 only if the host matched helo_try_verify_hosts, which caused the
4088 verification to occur when the EHLO/HELO command was issued. The ACL just
4089 tested the remembered result. Now, if a previous verification attempt has
4090 not happened, "verify = helo" does it there and then.
4092 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4094 TK/03 Fix log output including CR from clamd.
4096 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4097 exist provoked a memory error which could cause a segfault.
4099 PH/15 Installed PCRE 6.2
4101 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4103 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4104 of the problem. Specifically, suggested +O2 rather than +O1 for the
4107 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4109 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4110 record, the port was not correctly logged when the outgoing_port log
4111 selector was set (it logged the transort's default port).
4113 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4114 fallback_hosts, and "hosts" in the smtp transport.
4116 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4117 host errors such as "Connection refused".
4119 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4120 authentication with radiusclient 0.4.9:
4122 - Error returned from rc_read_config was caught wrongly
4123 - Username/password not passed on to radius server due to wrong length.
4125 The presumption is that some radiusclient API changes for 4.51/PH/17
4126 were not taken care of correctly. The code is still untested by me (my
4127 Linux distribution still has 0.3.2 of radiusclient), but it was
4128 contributed by a Radius user.
4130 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4131 expanding the "port" option of the smtp transport.
4133 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4134 while reading a MIME header. Thanks to Tom Hughes for a patch.
4136 PH/24 Include config.h inside local_scan.h so that configuration settings are
4139 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4140 that in an ACL for RCPT (for example), you can examine exactly what was
4143 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4144 commands, but it was not correctly comparing the address with the actual
4145 client host address. Thus, it would show the EHLO address in Received:
4146 header lines when this was not necessary.
4148 PH/27 Added the % operator to ${eval:}.
4150 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4151 it should be ignoring failures (because with -C, for example, it has lost
4152 privilege). It wasn't ignoring creation failures other than "already
4155 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4158 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4159 because an input line was too long, either on its own, or by virtue of
4160 too many continuations, the temporary file was not being removed, and the
4161 return code was incorrect.
4163 PH/31 Missing "BOOL" in function definition in filtertest.c.
4165 PH/32 Applied Sieve patches from the maintainer.
4167 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4169 PH/33 Added "verify = not_blind".
4171 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4172 Local/Makefile (with some defaults set). These are used in built scripts
4173 such as exicyclog, but they have never been used in the exim_install
4174 script (though there are many overriding facilities there). I have
4175 arranged that the exim_install script now takes note of these two
4178 PH/35 Installed configuration files for Dragonfly.
4180 PH/36 When a locally submitted message by a trusted user did not contain a
4181 From: header, and the sender address was obtained from -f or from an SMTP
4182 MAIL command, and the trusted user did not use -F to supply a sender
4183 name, $originator_name was incorrectly used when constructing a From:
4184 header. Furthermore, $originator_name was used for submission mode
4185 messages from external hosts without From: headers in a similar way,
4186 which is clearly wrong.
4188 PH/37 Added control=suppress_local_fixups.
4190 PH/38 When log_selector = +received_sender was set, and the addition of the
4191 sender made the log line's construction buffer exactly full, or one byte
4192 less than full, an overflow happened when the terminating "\n" was
4195 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4196 when the result of a list match is failure because a DNS lookup failed.
4198 PH/40 RM_COMMAND is now used in the building process.
4200 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4201 the "build-* directories that it finds.
4203 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4204 address in a domain literal was a prefix of an interface address.
4206 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4207 when verifying a sender address, unless rewrite_headers is false.
4209 PH/44 Wrote a long comment about why errors_to addresses are verified as
4210 recipients, not senders.
4212 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4213 the ratelimit ACL was added.
4215 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4217 PH/46 Added extra information about PostgreSQL errors to the error string.
4219 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4220 avoiding the need to install special zones in a real server. This is
4221 backwards compatible; if it can't find the fake resolver, it drops back.
4222 Thus, both old and new test suites can be run.
4224 TF/02 Added util/ratelimit.pl
4226 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4227 clock is set back in time.
4229 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4230 Candler <B.Candler@pobox.com>.
4232 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4233 OK for addresses that are the result of redirections.
4235 PH/48 A number of further additions for the benefit of the new test suite,
4236 including a fake gethostbyname() that interfaces to the fake DNS resolver
4239 TF/06 The fix for widen_domains has also been applied to qualify_single and
4240 search_parents which are the other dnslookup options that can cause
4243 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4246 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4248 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4249 service" if it encountered an MX record with an empty target hostname.
4250 The message is now "an MX or SRV record indicated no SMTP service".
4252 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4253 if the DNS of the sending site is misconfigured. This is quite a
4254 common situation. This change restores the behaviour of treating a
4255 helo verification defer as a failure.
4257 PH/51 If self=fail was set on a router, the bounce message did not include the
4258 actual error message.
4264 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4266 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4267 command itself ended in error, the underlying message about the transport
4268 filter timeout was being overwritten with the pipe command error. Now the
4269 underlying error message should be appended to the second error message.
4271 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4273 PH/02 Reduce the amount of output that "make" produces by default. Full output
4274 can still be requested.
4276 PH/03 The warning log line about a condition test deferring for a "warn" verb
4277 was being output only once per connection, rather than after each
4278 occurrence (because it was using the same function as for successful
4279 "warn" verbs). This seems wrong, so I have changed it.
4281 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4282 it should not have, which might have caused a crash in the right
4283 circumstances, but probably never did.
4285 PH/04 Installed a modified version of Tony Finch's patch to make submission
4286 mode fix the return path as well as the Sender: header line, and to
4287 add a /name= option so that you can make the user's friendly name appear
4290 TF/03 Added the control = fakedefer ACL modifier.
4292 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4293 Mark Lowes for thorough testing.
4295 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4297 TK/03 Merged latest SRS patch from Miles Wilton.
4299 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4300 with the definition in sysexits.h (which is #included earlier).
4301 Fortunately, Exim does not actually use EX_OK. The code used to try to
4302 preserve the sysexits.h value, by assuming that macro definitions were
4303 scanned for macro replacements. I have been disabused of this notion,
4304 so now the code just undefines EX_OK before #including unistd.h.
4306 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4307 in the smtp transport. When a block could not be written in a single
4308 write() function, the timeout was being re-applied to each part-write.
4309 This seems wrong - if the receiver was accepting one byte at a time it
4310 would take for ever. The timeout is now adjusted when this happens. It
4311 doesn't have to be particularly precise.
4313 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4314 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4316 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4317 without a domain if the check to <postmaster@domain> fails.
4319 SC/01 Eximstats: added -xls and the ability to specify output files
4320 (patch written by Frank Heydlauf).
4322 SC/02 Eximstats: use FileHandles for outputting results.
4324 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4326 SC/04 Eximstats: fixed display of large numbers with -nvr option
4328 SC/05 Eximstats: fixed merging of reports with empty tables.
4330 SC/06 Eximstats: added the -include_original_destination flag
4332 SC/07 Eximstats: removed tabs and trailing whitespace.
4334 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4336 TK/06 MBOX spool code: Add real "From " MBOX separator line
4337 so the .eml file is really in mbox format (even though
4338 most programs do not really care). Patch from Alex Miller.
4340 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4341 The latter is generated from $received_to and is only set if the
4342 message has one envelope recipient. SA can use these headers,
4343 obviously out-of-the-box. Patch from Alex Miller.
4345 PH/08 The ${def test on a variable was returning false if the variable's
4346 value was "0", contrary to what the specification has always said!
4347 The result should be true unless the variable is empty.
4349 PH/09 The syntax error of a character other than { following "${if
4350 def:variable_name" (after optional whitespace) was not being diagnosed.
4351 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4352 accidental colon was present, for example, could give incorrect results.
4354 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4355 result is used (not including appendfile, where other changes are about
4358 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4359 This involved changing a lot of size variables from int to off_t. It
4360 should work with maildirs and everything.
4362 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4363 spamd dying while we are connected to it.
4365 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4368 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4369 function for BDB 4.3.
4371 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4373 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4374 the sources for PCRE have been re-arranged and more files are now
4377 PH/15 The code I had for printing potentially long long variables in PH/11
4378 above was not the best (it lost precision). The length of off_t variables
4379 is now inspected at build time, and an appropriate printing format (%ld
4380 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4381 to be "long long int" or "long int". This is needed for the internal
4382 formatting function string_vformat().
4384 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4385 the configuration file to be ":syslog", then the script "guesses" where
4386 the logs files are, rather than using the compiled in default. In our
4387 case the guess is not the same as the compiled default, so the script
4388 suddenly stopped working when I started to use syslog. The patch checks
4389 to see if log_file_path is "". If so, it attempts to read it from exim
4390 with no configuration file to get the compiled in version, before it
4391 falls back to the previous guessing code."
4393 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4394 implementing BATV in an Exim configuration. See NewStuff for the gory
4397 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4398 Makefile that are specific to HP-UX.
4400 PH/18 If the "use_postmaster" option was set for a recipient callout together
4401 with the "random" option, the postmaster address was used as the MAIL
4402 FROM address for the random test, but not for the subsequent recipient
4403 test. It is now used for both.
4405 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4406 patch removes a few documentation additions to RFC 3028, because the
4407 latest draft now contains them. It adds the new en;ascii-case comparator
4408 and a new error check for 8bit text in MIME parts. Comparator and
4409 require names are now matched exactly. I enabled the subaddress
4410 extension, but it is not well tested yet (read: it works for me)."
4412 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4413 rework some of the code of TK/09 above to avoid the hardwired use of
4414 "%lld" and "long long". Replaced the call to snprintf() with a call to
4417 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4418 records point to non-existent hosts", "retry timeout exceeded", and
4419 "retry time not reached for any host after a long failure period".
4421 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4422 experimental DomainKeys support:
4424 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4425 (2) On an error such as an illegally used "control", the wrong name for
4426 the control was given.
4428 These problems did NOT occur unless DomainKeys support was compiled.
4430 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4432 PH/24 Added ${if match_ip condition.
4434 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4435 databases so that it will be absolutely obvious if a crash occurs in the
4436 DB library. This is a regular occurrence (often caused by mis-matched
4439 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4440 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4441 picked up on a user's system that detects such things. There doesn't seem
4442 to be a gcc warning option for this - only an attribute that has to be
4443 put on the function's prototype. It seems that in Fedora Core 4 they have
4444 set this on a number of new functions. No doubt there will be more in due
4447 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4448 specify a transport. However, if an address that was verified by such a
4449 router was the subject of a callout, Exim crashed because it tried to
4450 read the rcpt_include_affixes from the non-existent transport. Now it
4451 just assumes that the setting of that option is false. This bug was
4452 introduced by 4.51/PH/31.
4454 PH/28 Changed -d+all to exclude +memory, because that information is very
4455 rarely of interest, but it makes the output a lot bigger. People tend to
4456 do -d+all out of habit.
4458 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4459 code in os-type was giving problems when libc.so lives in lib64, like on
4462 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4463 aren't the modern standard, and it seems that some systems' include files
4464 don't always have them. Exim was already checking for some of the newer
4465 ones like T_AAAA, and defining it itself. I've added checks for all the
4466 record types that Exim uses.
4468 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4469 not automatically generating a new one, as it is supposed to. This
4470 prevented TLS from working. If the file did exist, but contained invalid
4471 data, a new version was generated, as expected. It was only the case of a
4472 non-existent file that was broken.
4474 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4475 with a change in libdomainkeys > 0.64.
4477 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4478 from DNS. If the selector record carries the flag, it now has
4479 precedence over the domain-wide flag.
4481 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4483 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4484 the use of a port name that isn't defined in /etc/services) occurred, the
4485 message was deferred as in a normal delivery, and thus remained on the
4486 spool, instead of being failed because of the mua_wrapper setting. This
4487 is now fixed, and I tidied up some of the mua_wrapper messages at the
4490 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4491 the messages in a hash of arrays rather than using individual hashes.
4492 This is a bit cleaner and results in dramatic memory savings, albeit
4493 at a slight CPU cost.
4495 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4496 as requested by Marc Sherman.
4498 SC/10 Eximstats: added histograms for user specified patterns as requested
4501 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4503 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4504 fopen() in the content-scanning modules that did not already have it.
4510 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4511 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4513 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4515 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4517 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4518 to test Sieve filters that use "vacation".
4520 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4521 that changes the way the GnuTLS parameters are stored in the cache file.
4522 The new format can be generated externally. For backward compatibility,
4523 if the data in the cache doesn't make sense, Exim assumes it has read an
4524 old-format file, and it generates new data and writes a new file. This
4525 means that you can't go back to an older release without removing the
4528 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4529 work if there are any delivery delays because "one_time" forces the
4530 parent to be marked "delivered", so its unseen clone is never tried
4531 again. For this reason, Exim now forbids the simultaneous setting of
4534 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4535 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4536 entry if you want to know the details. The fix, however, neglected to
4537 consider the case when local delivery batching is involved. The test for
4538 "previously delivered" was not happening when checking to see if an
4539 address could be batched with a previous (undelivered) one; under
4540 certain circumstances this could lead to multiple deliveries to the same
4543 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4544 in its include files, and this causes problems building Exim.
4546 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4547 header_syntax) but Exim was just ignoring anything given after a slash.
4548 In particular, this caused confusion with an attempt to use "verify =
4549 reverse_host_lookup/defer_ok". An error is now given when options are
4550 supplied for verify items that do not have them. (Maybe reverse_host_
4551 lookup should have a defer_ok option, but that's a different point.)
4553 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4554 defined by RFC 821) to 2048, because there were problems with some AUTH
4555 commands, and RFC 1869 says the size should be increased for extended
4556 SMTP commands that take arguments.
4558 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4561 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4562 "unknown" error; now it says that the functionality isn't in the binary.
4564 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4565 an address' error message when a string expansion fails (syntax or
4566 whatever). Otherwise the password may appear in the log. Following change
4567 PH/42 below, there is no longer a chance of it appearing in a bounce
4570 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4572 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4573 of its addresses was ever tried. (Bugzilla bug #2.)
4575 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4576 the result incorrectly in the debug output. (It correctly added a newline
4577 to what was transported.)
4579 TF/01 Added $received_time.
4581 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4582 commented out examples of how to interface to a virus scanner and to
4583 SpamAssassin. Also added commented examples of av_scanner and
4584 spamd_address settings.
4586 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4587 and controls are allowed in which ACLs. There were a couple of minor
4588 errors. Some of the entries in the conditions table (which is a table of
4589 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4590 negation of where the condition IS allowed.
4592 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4594 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4595 header file does not have a version number, so I've had to invent a new
4596 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4597 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4598 radiusclient), but it was contributed by a Radius user.
4600 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4601 files or directories, for OpenSSL.
4603 PH/19 When an Exim process that is running as root has to create an Exim log
4604 file, it does so in a subprocess that runs as exim:exim so as to get the
4605 ownership right at creation (otherwise, other Exim processes might see
4606 the file with the wrong ownership). There was no test for failure of this
4607 fork() call, which would lead to the process getting stuck as it waited
4608 for a non-existent subprocess. Forks do occasionally fail when resources
4609 run out. I reviewed all the other calls to fork(); they all seem to check
4612 PH/20 When checking for unexpected SMTP input at connect time (before writing
4613 the banner), Exim was not dealing correctly with a non-positive return
4614 from the read() function. If the client had disconnected by this time,
4615 the result was a log entry for a synchronization error with an empty
4616 string after "input=" when read() returned zero. If read() returned -1
4617 (an event I could not check), uninitialized data bytes were printed.
4618 There were reports of junk text (parts of files, etc) appearing after
4621 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4623 PH/22 Added support for macro redefinition, and (re)definition in between
4624 driver and ACL definitions.
4626 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4627 forgetting to use the resulting value; it was using the unexpanded value.
4629 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4630 hadn't been configured. The fix is from Juergen Kreileder, who
4631 understands it better than I do:
4633 "Here's what I see happening with three configured cyrus_sasl
4634 authenticators configured (plain, login, cram-md5):
4636 On startup auth_cyrus_sasl_init() gets called for each of these.
4637 This means three calls to sasl_listmech() without a specified mech_list.
4638 => SASL tests which mechs of all available mechs actually work
4639 => three warnings about OTP not working
4640 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4642 With the patch, sasl_listmech() also gets called three times. But now
4643 SASL's mech_list option is set to the server_mech specified in the the
4644 authenticator. Or in other words, the answer from sasl_listmech()
4645 gets limited to just the mech you're testing for (which is different
4647 => the return list contains just 'plain' or 'login', 'cram-md5' or
4648 nothing depending on the value of ob->server_mech.
4650 I've just tested the patch: Authentication still works fine,
4651 unavailable mechs specified in the exim configuration are still
4652 caught, and the auth.log warnings about OTP are gone."
4654 PH/25 When debugging is enabled, the contents of the command line are added
4655 to the debugging output, even when log_selector=+arguments is not
4658 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4659 answer is "GNU", and only if the return is "GNU/something" is the answer
4662 PH/27 $acl_verify_message is now set immediately after the failure of a
4663 verification in an ACL, and so is available in subsequent modifiers. In
4664 particular, the message can be preserved by coding like this:
4666 warn !verify = sender
4667 set acl_m0 = $acl_verify_message
4669 Previously, $acl_verify_message was set only while expanding "message"
4670 and "log_message" when a very denied access.
4672 PH/28 Modified OS/os.c-Linux with
4674 -#ifndef OS_LOAD_AVERAGE
4675 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4677 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4678 nomenclature these days.)
4680 PH/29 Installed patch from the Sieve maintainer that adds the options
4681 sieve_useraddress and sieve_subaddress to the redirect router.
4683 PH/30 In these circumstances:
4684 . Two addresses routed to the same list of hosts;
4685 . First host does not offer TLS;
4686 . First host accepts first address;
4687 . First host gives temporary error to second address;
4688 . Second host offers TLS and a TLS session is established;
4689 . Second host accepts second address.
4690 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4691 and peerdn, if requested) that were in fact used only for the second
4694 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4695 attention to any local part prefix or suffix that was matched by the
4696 router that accepted the address. It now behaves in the same way as it
4697 does for delivery: the affixes are removed from the local part unless
4698 rcpt_include_affixes is set on the transport.
4700 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4701 timeout during the DATA phase of an incoming message.
4703 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4704 applied a patch sanctioned by the Sieve maintainer.
4706 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4707 the uid or gid is negative. A case of a negative gid caused this to be
4708 noticed. The fix allows for either to be negative.
4710 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4711 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4714 PH/36 The change PH/12 above was broken. Fixed it.
4716 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4717 the grounds that routing the same address twice would always produce the
4718 same answer. This might have been true once, but it is certainly no
4719 longer true now. Routing a child address may depend on the previous
4720 routing that produced that child. Some complicated redirection strategies
4721 went wrong when messages had multiple recipients, and made Exim's
4722 behaviour dependent on the order in which the addresses were given.
4724 I have moved the duplicate checking until after the routing is complete.
4725 Exim scans the addresses that are assigned to local and remote
4726 transports, and removes any duplicates. This means that more work will be
4727 done, as duplicates will always all be routed, but duplicates are
4728 presumably rare, so I don't expect this is of any significance.
4730 For deliveries to pipes, files, and autoreplies, the duplicate checking
4731 still happens during the routing process, since they are not going to be
4734 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4735 It corrects a timeout issue with spamd. This is Ian's comment: "The
4736 background is that sometimes spamd either never reads data from a
4737 connection it has accepted, or it never writes response data. The exiscan
4738 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4739 blindly assumes that writes won't block so it may never time out."
4741 PH/39 Allow G after quota size as well as K and M.
4743 PH/40 The value set for $authenticated_id in an authenticator may not contain
4744 binary zeroes or newlines because the value is written to log lines and
4745 to spool files. There was no check on this. Now the value is run through
4746 the string_printing() function so that such characters are converted to
4747 printable escape sequences.
4749 PH/41 $message_linecount is a new variable that contains the total number of
4750 lines in the message. Compare $body_linecount, which is the count for the
4753 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4754 bounce and delay warning messages, except in certain special cases, which
4757 (a) An SMTP error message from a remote host;
4758 (b) A message specified in a :fail: redirection;
4759 (c) A message specified in a "fail" command in a system filter;
4760 (d) A message specified in a FAIL return from the queryprogram router;
4761 (e) A message specified by the cannot_route_message router option.
4763 In these cases only, Exim does include the error details in bounce and
4764 warning messages. There are also a few cases where bland messages such
4765 as "unrouteable address" or "local delivery error" are given.
4767 PH/43 $value is now also set for the "else" part of a ${run expansion.
4769 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4770 being worked on, but at least Exim now implements the latest version to
4773 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4774 process to complete was treated as a delivery failure, a timeout while
4775 writing the message to the pipe was logged, but erroneously treated as a
4776 successful delivery. Such timeouts include transport filter timeouts. For
4777 consistency with the overall process timeout, these timeouts are now
4778 treated as errors, giving rise to delivery failures by default. However,
4779 there is now a new Boolean option for the pipe transport called
4780 timeout_defer, which, if set TRUE, converts the failures into defers for
4781 both kinds of timeout. A transport filter timeout is now identified in
4784 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4785 systems where "make" and "gmake" are different, calling "gmake" at top
4786 level broke things. I've arranged for the value of $(MAKE) to be passed
4787 from the Makefile to this script so that it can call the same version of
4791 A note about Exim versions 4.44 and 4.50
4792 ----------------------------------------
4794 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4795 changes of various kinds. As a consequence, a big documentation update was
4796 needed. This delayed the release for rather longer than seemed good, especially
4797 in the light of a couple of (minor) security issues. Therefore, the changes
4798 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4799 release. So 4.44 and 4.50 are in effect two different branches that both start
4802 I have left the 4.50 change log unchanged; it contains all the changes since
4803 4.43. The change log for 4.44 is below; many of its items are identical to
4804 those for 4.50. This seems to be the most sensible way to preserve the
4805 historical information.
4811 1. Minor wording change to the doc/README.SIEVE file.
4813 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4814 computation of the current number of files was incorrect.
4816 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4817 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4820 4. Give more explanation in the error message when the command for a transport
4821 filter fails to execute.
4823 5. There are several places where Exim runs a non-Exim command in a
4824 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4825 was being done only for the command run by the queryprogram router. It is
4826 now done for all such subprocesses. The other cases are: ${run, transport
4827 filters, and the commands run by the lmtp and pipe transports.
4829 6. Added CONFIGURE_GROUP build-time option.
4831 7. Some older OS have a limit of 256 on the maximum number of file
4832 descriptors. Exim was using setrlimit() to set 1000 as a large value
4833 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4834 systems. I've change it so that if it can't get 1000, it tries for 256.
4836 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4837 was an oversight, and furthermore, ever since the addition of extra
4838 controls (e.g. 4.43/32), the checks on when to allow different forms of
4839 "control" were broken. There should now be diagnostics for all cases when a
4840 control that does not make sense is encountered.
4842 9. Added the /retain_sender option to "control=submission".
4844 10. $recipients is now available in the predata ACL (oversight).
4846 11. Tidy the search cache before the fork to do a delivery from a message
4847 received from the command line. Otherwise the child will trigger a lookup
4848 failure and thereby defer the delivery if it tries to use (for example) a
4849 cached ldap connection that the parent has called unbind on.
4851 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4852 of $address_data from the recipient verification was clobbered by the
4853 sender verification.
4855 13. The value of address_data from a sender verification is now available in
4856 $sender_address_data in subsequent conditions in the ACL statement.
4858 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4860 15. Added a new option "connect=<time>" to callout options, to set a different
4863 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4864 was its contents. (It was OK if the option was not defined at all.)
4866 17. A "Completed" log line is now written for messages that are removed from
4867 the spool by the -Mrm option.
4869 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4870 information about exactly what failed.
4872 19. Added -dd to debug only the daemon process.
4874 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4875 handles timeouts, both on the server side and network timeouts. Renamed the
4876 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4878 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4879 It is now set to "smtps".
4881 22. $host_address is now set to the target address during the checking of
4882 ignore_target_hosts.
4884 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4885 being passed; this would have caused $sender_host_name to have been used if
4886 matching the list had actually called for a host name (not very likely,
4887 since this list is usually IP addresses). A host name is now passed as
4890 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4891 code that specifies a non-restarting handler (typically sigaction() in
4892 modern systems) in an attempt to fix a rare and obscure crash bug.
4894 25. Narrowed the window for a race in the daemon that could cause it to ignore
4895 SIGCHLD signals. This is not a major problem, because they are used only to
4896 wake it up if nothing else does.
4898 26. A malformed maildirsize file could cause Exim to calculate negative values
4899 for the mailbox size or file count. Odd effects could occur as a result.
4900 The maildirsize information is now recalculated if the size or filecount
4903 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4904 support for a long time. Removed HAVE_SYS_VFS_H.
4906 28. Installed the latest version of exipick from John Jetmore.
4908 29. In an address list, if the pattern was not a regular expression, an empty
4909 subject address (from a bounce message) matched only if the pattern was an
4910 empty string. Non-empty patterns were not even tested. This was the wrong
4911 because it is perfectly reasonable to use an empty address as part of a
4912 database query. An empty address is now tested by patterns that are
4913 lookups. However, all the other forms of pattern expect the subject to
4914 contain a local part and a domain, and therefore, for them, an empty
4915 address still always fails if the pattern is not itself empty.
4917 30. Exim went into a mad DNS loop when attempting to do a callout where the
4918 host was specified on an smtp transport, and looking it up yielded more
4919 than one IP address.
4921 31. Re-factored the code for checking spool and log partition space into a
4922 function that finds that data and another that does the check. The former
4923 is then used to implement four new variables: $spool_space, $log_space,
4924 $spool_inodes, and $log_inodes.
4926 32. The RFC2047 encoding function was originally intended for short strings
4927 such as real names; it was not keeping to the 75-character limit for
4928 encoded words that the RFC imposes. It now respects the limit, and
4929 generates multiple encoded words if necessary. To be on the safe side, I
4930 have increased the buffer size for the ${rfc2047: expansion operator from
4933 33. It is now permitted to omit both strings after an "if" condition; if the
4934 condition is true, the result is "true". As before, when the second string
4935 is omitted, a false condition yields an empty string. This makes it less
4936 cumbersome to write custom ACL and router conditions.
4938 34. Failure to deliver a bounce message always caused it to be frozen, even if
4939 there was an errors_to setting on the router. The errors_to setting is now
4942 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4943 canonical form (fully expanded) before being placed in
4944 $sender_host_address.
4946 36. The table in the code that translates DNS record types into text (T_A to
4947 "A" for instance) was missing entries for NS and CNAME. It is just possible
4948 that this could have caused confusion if both these types were looked up
4949 for the same domain, because the text type is used as part of Exim's
4950 per-process caching. But the chance of anyone hitting this buglet seems
4953 37. The dnsdb lookup has been extended in a number of ways.
4955 (1) There is a new type, "zns", which walks up the domain tree until it
4956 finds some nameserver records. It should be used with care.
4958 (2) There is a new type, "mxh", which is like "mx" except that it returns
4959 just the host names, not the priorities.
4961 (3) It is now possible to give a list of domains (or IP addresses) to be
4962 looked up. The behaviour when one of the lookups defers can be
4963 controlled by a keyword.
4965 (4) It is now possible to specify the separator character for use when
4966 multiple records are returned.
4968 38. The dnslists ACL condition has been extended: it is now possible to supply
4969 a list of IP addresses and/or domains to be looked up in a particular DNS
4972 39. Added log_selector=+queue_time_overall.
4974 40. When running the queue in the test harness, wait just a tad after forking a
4975 delivery process, to get repeatability of debugging output.
4977 41. Include certificate and key file names in error message when GnuTLS fails
4978 to set them up, because the GnuTLS error message doesn't include the name
4979 of the failing file when there is a problem reading it.
4981 42. Allow both -bf and -bF in the same test run.
4983 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4985 44. The "Exiscan patch" is now merged into the mainline Exim source.
4987 45. Sometimes the final signoff response after QUIT could fail to get
4988 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4989 < 0 before doing a fflush(). This bug looks as though it goes back to the
4990 introduction of TLS in release 3.20, but "sometimes" must have been rare
4991 because the tests only now provoked it.
4993 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4994 (this can affect the format of dates).
4996 47. exim_tidydb, when checking for the continued existence of a message for
4997 which it has found a message-specific retry record, was not finding
4998 messages that were in split spool directories. Consequently, it was
4999 deleting retry records that should have stayed in existence.
5001 48. Steve fixed some bugs in eximstats.
5003 49. The SPA authentication driver was not abandoning authentication and moving
5004 on to the next authenticator when an expansion was forced to fail,
5005 contradicting the general specification for all authenticators. Instead it
5006 was generating a temporary error. It now behaves as specified.
5008 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5009 (the order specifies the preference for clients). The order is now AES256,
5010 AES128, 3DES, ARCFOUR128.
5012 51. Small patch to Sieve code - explicitly set From: when generating an
5015 52. Exim crashed if a remote delivery caused a very long error message to be
5016 recorded - for instance if somebody sent an entire SpamAssassin report back
5017 as a large number of 550 error lines. This bug was coincidentally fixed by
5018 increasing the size of one of Exim's internal buffers (big_buffer) that
5019 happened as part of the Exiscan merge. However, to be on the safe side, I
5020 have made the code more robust (and fixed the comments that describe what
5023 53. Now that there can be additional text after "Completed" in log lines (if
5024 the queue_time_overall log selector is set), a one-byte patch to exigrep
5025 was needed to allow it to recognize "Completed" as not the last thing in
5028 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5029 patch that reportedly fixes this has been added. I am not expert enough to
5030 create a test for it. This is what the patch creator wrote:
5032 "I found a little strange behaviour of ldap code when working with
5033 Windows 2003 AD Domain, where users was placed in more than one
5034 Organization Units. When I tried to give exim partial DN, the exit code
5035 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5036 But simultaneously result of request was absolutely normal ldap result,
5037 so I produce this patch..."
5039 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5040 REFERENCE, so I have modified the code to exclude the patch when that macro
5043 55. Some experimental protocols are using DNS PTR records for new purposes. The
5044 keys for these records are domain names, not reversed IP addresses. The
5045 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5046 leaves it alone. Component reversal etc. now happens only for IP addresses.
5049 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5051 57. Double the size of the debug message buffer (to 2048) so that more of very
5052 long debug lines gets shown.
5054 58. The exicyclog utility now does better if the number of log files to keep
5055 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5057 59. Two changes related to the smtp_active_hostname option:
5059 (1) $smtp_active_hostname is now available as a variable.
5060 (2) The default for smtp_banner uses $smtp_active_hostname instead
5061 of $primary_hostname.
5063 60. The host_aton() function is supposed to be passed a string that is known
5064 to be a valid IP address. However, in the case of IPv6 addresses, it was
5065 not checking this. This is a hostage to fortune. Exim now panics and dies
5066 if the condition is not met. A case was found where this could be provoked
5067 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5068 components; fortuitously, this particular loophole had already been fixed
5069 by change 4.50/55 above.
5071 If there are any other similar loopholes, the new check in host_aton()
5072 itself should stop them being exploited. The report I received stated that
5073 data on the command line could provoke the exploit when Exim was running as
5074 exim, but did not say which command line option was involved. All I could
5075 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5076 running as the user.
5079 61. There was a buffer overflow vulnerability in the SPA authentication code
5080 (which came originally from the Samba project). I have added a test to the
5081 spa_base64_to_bits() function which I hope fixes it.
5084 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5085 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5087 63. The daemon start-up calls getloadavg() while still root for those OS that
5088 need the first call to be done as root, but it missed one case: when
5089 deliver_queue_load_max is set with deliver_drop_privilege. This is
5090 necessary for the benefit of the queue runner, because there is no re-exec
5091 when deliver_drop_privilege is set.
5093 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5094 This has been fixed.
5096 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5097 was in use, was not putting the data itself into the right store pool;
5098 consequently, it could be overwritten for a subsequent message in the same
5099 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5102 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5104 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5105 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5106 the function were treating the return as a boolean value, which happened to
5107 work because 0=false and not-0=true, but is not correct code.
5109 68. The host_aton() function was not handling scoped IPv6 addresses (those
5110 with, for example, "%eth0" on the end) correctly.
5112 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5113 negated items (that is, ~something) in unsigned ints. Some compilers
5114 apparently mutter when there is no cast.
5116 70. If an address verification called from an ACL failed, and did not produce a
5117 user-specific message (i.e. there was only a "system" message), nothing was
5118 put in $acl_verify_message. In this situation, it now puts the system
5121 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5122 session; change 4.31/43 added the unwanted input to the log line - except
5123 that it did not do this in the start of session case. It now does.
5125 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5126 This is wrong and can cause the other end to generate a synchronization
5127 error if it is another Exim or anything else that does the synchronization
5128 check. A QUIT command is no longer sent after a timeout.
5130 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5131 during host lookups.
5133 74. The defer_ok option of callout verification was not working if it was used
5134 when verifying addresses in header lines, that is, for this case:
5136 verify = header_sender/callout=defer_ok
5138 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5139 those file descriptors could be used for SMTP connections. If anything
5140 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5141 could be sent to the SMTP client, causing chaos. The daemon now opens
5142 stdin, stdout, and stderr to /dev/null when it puts itself into the
5145 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5146 log by default. The user can override this with suitable Perl magic.
5148 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5149 the log message when discard triggers, was not working for the DATA ACL or
5150 for the non-SMTP ACL.
5152 78. Error message wording change in sieve.c.
5154 79. If smtp_accept_max_per_host was set, the number of connections could be
5155 restricted to fewer than expected, because the daemon was trying to set up
5156 a new connection before checking whether the processes handling previous
5157 connections had finished. The check for completed processes is now done
5158 earlier. On busy systems, this bug wouldn't be noticed because something
5159 else would have woken the daemon, and it would have reaped the completed
5162 80. If a message was submitted locally by a user whose login name contained one
5163 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5164 It caused a spool format error. I have fixed the spool reading code. A
5165 related problem was that the "from" clause in the Received: line became
5166 illegal because of the space(s). It is now covered by ${quote_local_part.
5168 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5171 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5173 83. Patch from Sieve maintainer to fix unterminated string problem in
5174 "vacation" handling.
5176 84. Some minor changes to the Linux configuration files to help with other
5177 OS variants using glibc.
5179 85. One more patch for Sieve to update vacation handling to latest spec.
5182 ----------------------------------------------------
5183 See the note above about the 4.44 and 4.50 releases.
5184 ----------------------------------------------------
5190 1. Change 4.43/35 introduced a bug that caused file counts to be
5191 incorrectly computed when quota_filecount was set in an appendfile
5194 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5195 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5198 3. Give more explanation in the error message when the command for a transport
5199 filter fails to execute.
5201 4. There are several places where Exim runs a non-Exim command in a
5202 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5203 was being done only for the command run by the queryprogram router. It is
5204 now done for all such subprocesses. The other cases are: ${run, transport
5205 filters, and the commands run by the lmtp and pipe transports.
5207 5. Some older OS have a limit of 256 on the maximum number of file
5208 descriptors. Exim was using setrlimit() to set 1000 as a large value
5209 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5210 systems. I've change it so that if it can't get 1000, it tries for 256.
5212 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5213 was an oversight, and furthermore, ever since the addition of extra
5214 controls (e.g. 4.43/32), the checks on when to allow different forms of
5215 "control" were broken. There should now be diagnostics for all cases when a
5216 control that does not make sense is encountered.
5218 7. $recipients is now available in the predata ACL (oversight).
5220 8. Tidy the search cache before the fork to do a delivery from a message
5221 received from the command line. Otherwise the child will trigger a lookup
5222 failure and thereby defer the delivery if it tries to use (for example) a
5223 cached ldap connection that the parent has called unbind on.
5225 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5226 of $address_data from the recipient verification was clobbered by the
5227 sender verification.
5229 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5230 was its contents. (It was OK if the option was not defined at all.)
5232 11. A "Completed" log line is now written for messages that are removed from
5233 the spool by the -Mrm option.
5235 12. $host_address is now set to the target address during the checking of
5236 ignore_target_hosts.
5238 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5239 being passed; this would have caused $sender_host_name to have been used if
5240 matching the list had actually called for a host name (not very likely,
5241 since this list is usually IP addresses). A host name is now passed as
5244 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5245 code that specifies a non-restarting handler (typically sigaction() in
5246 modern systems) in an attempt to fix a rare and obscure crash bug.
5248 15. Narrowed the window for a race in the daemon that could cause it to ignore
5249 SIGCHLD signals. This is not a major problem, because they are used only to
5250 wake it up if nothing else does.
5252 16. A malformed maildirsize file could cause Exim to calculate negative values
5253 for the mailbox size or file count. Odd effects could occur as a result.
5254 The maildirsize information is now recalculated if the size or filecount
5257 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5258 support for a long time. Removed HAVE_SYS_VFS_H.
5260 18. Updated exipick to current release from John Jetmore.
5262 19. Allow an empty sender to be matched against a lookup in an address list.
5263 Previously the only cases considered were a regular expression, or an
5266 20. Exim went into a mad DNS lookup loop when doing a callout where the
5267 host was specified on the transport, if the DNS lookup yielded more than
5270 21. The RFC2047 encoding function was originally intended for short strings
5271 such as real names; it was not keeping to the 75-character limit for
5272 encoded words that the RFC imposes. It now respects the limit, and
5273 generates multiple encoded words if necessary. To be on the safe side, I
5274 have increased the buffer size for the ${rfc2047: expansion operator from
5277 22. Failure to deliver a bounce message always caused it to be frozen, even if
5278 there was an errors_to setting on the router. The errors_to setting is now
5281 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5282 canonical form (fully expanded) before being placed in
5283 $sender_host_address.
5285 24. Updated eximstats to version 1.33
5287 25. Include certificate and key file names in error message when GnuTLS fails
5288 to set them up, because the GnuTLS error message doesn't include the name
5289 of the failing file when there is a problem reading it.
5291 26. Expand error message when OpenSSL has problems setting up cert/key files.
5294 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5295 (this can affect the format of dates).
5297 28. exim_tidydb, when checking for the continued existence of a message for
5298 which it has found a message-specific retry record, was not finding
5299 messages that were in split spool directories. Consequently, it was
5300 deleting retry records that should have stayed in existence.
5302 29. eximstats updated to version 1.35
5303 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5304 1.35 - bugfix such that pie charts by volume are generated correctly
5306 30. The SPA authentication driver was not abandoning authentication and moving
5307 on to the next authenticator when an expansion was forced to fail,
5308 contradicting the general specification for all authenticators. Instead it
5309 was generating a temporary error. It now behaves as specified.
5311 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5312 (the order specifies the preference for clients). The order is now AES256,
5313 AES128, 3DES, ARCFOUR128.
5315 31. Small patch to Sieve code - explicitly set From: when generating an
5318 32. Exim crashed if a remote delivery caused a very long error message to be
5319 recorded - for instance if somebody sent an entire SpamAssassin report back
5320 as a large number of 550 error lines. This bug was coincidentally fixed by
5321 increasing the size of one of Exim's internal buffers (big_buffer) that
5322 happened as part of the Exiscan merge. However, to be on the safe side, I
5323 have made the code more robust (and fixed the comments that describe what
5326 33. Some experimental protocols are using DNS PTR records for new purposes. The
5327 keys for these records are domain names, not reversed IP addresses. The
5328 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5329 leaves it alone. Component reversal etc. now happens only for IP addresses.
5332 34. The host_aton() function is supposed to be passed a string that is known
5333 to be a valid IP address. However, in the case of IPv6 addresses, it was
5334 not checking this. This is a hostage to fortune. Exim now panics and dies
5335 if the condition is not met. A case was found where this could be provoked
5336 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5337 components; fortuitously, this particular loophole had already been fixed
5338 by change 4.50/55 or 4.44/33 above.
5340 If there are any other similar loopholes, the new check in host_aton()
5341 itself should stop them being exploited. The report I received stated that
5342 data on the command line could provoke the exploit when Exim was running as
5343 exim, but did not say which command line option was involved. All I could
5344 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5345 running as the user.
5348 35. There was a buffer overflow vulnerability in the SPA authentication code
5349 (which came originally from the Samba project). I have added a test to the
5350 spa_base64_to_bits() function which I hope fixes it.
5353 36. The daemon start-up calls getloadavg() while still root for those OS that
5354 need the first call to be done as root, but it missed one case: when
5355 deliver_queue_load_max is set with deliver_drop_privilege. This is
5356 necessary for the benefit of the queue runner, because there is no re-exec
5357 when deliver_drop_privilege is set.
5359 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5360 was in use, was not putting the data itself into the right store pool;
5361 consequently, it could be overwritten for a subsequent message in the same
5362 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5365 38. Sometimes the final signoff response after QUIT could fail to get
5366 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5367 < 0 before doing a fflush(). This bug looks as though it goes back to the
5368 introduction of TLS in release 3.20, but "sometimes" must have been rare
5369 because the tests only now provoked it.
5375 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5376 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5377 Now it returns an integer. A number of calls were still expecting a T/F
5378 return. Fortuitously, in all cases, the tests worked in OK situations,
5379 which is the norm. However, things would have gone wrong on any write
5380 failures on the smtp file descriptor. This function is used when sending
5381 messages over SMTP and also when doing verify callouts.
5383 2. When Exim is called to do synchronous delivery of a locally submitted
5384 message (the -odf or -odi options), it no longer closes stderr before doing
5387 3. Implemented the mua_wrapper option.
5389 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5391 5. Implemented the functions header_remove(), header_testname(),
5392 header_add_at_position(), and receive_remove_recipient(), and exported them
5395 6. If an ACL "warn" statement specified the addition of headers, Exim already
5396 inserted X-ACL-Warn: at the start if there was no header name. However, it
5397 was not making this test for the second and subsequent header lines if
5398 there were newlines in the string. This meant that an invalid header could
5399 be inserted if Exim was badly configured.
5401 7. Allow an ACL "warn" statement to add header lines at the start or after all
5402 the Received: headers, as well as at the end.
5404 8. Added the rcpt_4xx retry error code.
5406 9. Added postmaster_mailfrom=xxx to callout verification option.
5408 10. Added mailfrom=xxxx to the callout verification option, for verify=
5411 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5412 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5414 12. Inserted some casts to stop certain compilers warning when using pointer
5415 differences as field lengths or precisions in printf-type calls (mostly
5416 affecting debugging statements).
5418 13. Added optional readline() support for -be (dynamically loaded).
5420 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5421 same clock tick as a message's arrival, so that its received time was the
5422 same as the "first fail" time on the retry record, and that message
5423 remained on the queue past the ultimate address timeout, every queue runner
5424 would try a delivery (because it was past the ultimate address timeout) but
5425 after another failure, the ultimate address timeout, which should have then
5426 bounced the address, did not kick in. This was a "< instead of <=" error;
5427 in most cases the first failure would have been in the next clock tick
5428 after the received time, and all would be well.
5430 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5431 being recognized when the domain list was tested by the match_domain
5432 condition in an expansion string.
5434 16. Added the ${str2b64: operator.
5436 17. Exim was always calling setrlimit() to set a large limit for the number of
5437 processes, without checking whether the existing limit was already
5438 adequate. (It did check for the limit on file descriptors.) Furthermore,
5439 errors from getrlimit() and setrlimit() were being ignored. Now they are
5440 logged to the main and panic logs, but Exim does carry on, to try to do its
5441 job under whatever limits there are.
5443 18. Imported PCRE 5.0.
5445 19. Trivial typo in log message " temporarily refused connection" (the leading
5448 20. If the log selector return_path_on_delivery was set and an address was
5449 redirected to /dev/null, the delivery process crashed because it assumed
5450 that a return path would always be set for a "successful" delivery. In this
5451 case, the whole delivery is bypassed as an optimization, and therefore no
5454 21. Internal re-arrangement: the function for sending a challenge and reading
5455 a response while authentication was assuming a zero-terminated challenge
5456 string. It's now changed to take a pointer and a length, to allow for
5457 binary data in such strings.
5459 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5461 23. Exim was not respecting finduser_retries when seeking the login of the
5462 uid under which it was called; it was always trying 10 times. (The default
5463 setting of finduser_retries is zero.) Also, it was sleeping after the final
5464 failure, which is pointless.
5466 24. Implemented tls_on_connect_ports.
5468 25. Implemented acl_smtp_predata.
5470 26. If the domain in control=submission is set empty, Exim assumes that the
5471 authenticated id is a complete email address when it generates From: or
5472 Sender: header lines.
5474 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5475 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5476 chown and chgrp in /bin and hostname in /usr/bin.
5478 28. Exim was keeping the "process log" file open after each use, just as it
5479 does for the main log. This opens the possibility of it remaining open for
5480 long periods when the USR1 signal hits a daemon. Occasional processlog
5481 errors were reported, that could have been caused by this. Anyway, it seems
5482 much more sensible not to leave this file open at all, so that is what now
5485 29. The long-running daemon process does not normally write to the log once it
5486 has entered its main loop, and it closes the log before doing so. This is
5487 so that log files can straightforwardly be renamed and moved. However,
5488 there are a couple of unusual error situations where the daemon does write
5489 log entries, and I had neglected to close the log afterwards.
5491 30. The text of an SMTP error response that was received during a remote
5492 delivery was being truncated at 512 bytes. This is too short for some of
5493 the long messages that one sometimes sees. I've increased the limit to
5496 31. It is now possible to make retry rules that apply only when a message has a
5497 specific sender, in particular, an empty sender.
5499 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5500 it possible to be selective about when SMTP synchronization is enforced.
5502 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5504 32. Implemented hosts_connection_nolog.
5506 33. Added an ACL for QUIT.
5508 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5511 35. Added mailbox_size and mailbox_filecount to appendfile.
5513 36. Added control = no_multiline_responses to ACLs.
5515 37. There was a bug in the logic of the code that waits for the clock to tick
5516 in the case where the clock went backwards by a substantial amount such
5517 that the microsecond fraction of "now" was more than the microsecond
5518 fraction of "then" (but the whole seconds number was less).
5520 38. Added support for the libradius Radius client library this is found on
5521 FreeBSD (previously only the radiusclient library was supported).
5527 1. When certain lookups returned multiple values in the form name=value, the
5528 quoting of the values was not always being done properly. Specifically:
5529 (a) If the value started with a double quote, but contained no whitespace,
5531 (b) If the value contained whitespace other than a space character (i.e.
5532 tabs or newlines or carriage returns) it was not quoted.
5533 This fix has been applied to the mysql and pgsql lookups by writing a
5534 separate quoting function and calling it from the lookup code. The fix
5535 should probably also be applied to nisplus, ibase and oracle lookups, but
5536 since I cannot test any of those, I have not disturbed their existing code.
5538 2. A hit in the callout cache for a specific address caused a log line with no
5539 reason for rejecting RCPT. Now it says "Previous (cached) callout
5540 verification failure".
5542 3. There was an off-by-one bug in the queryprogram router. An over-long
5543 return line was truncated at 256 instead of 255 characters, thereby
5544 overflowing its buffer with the terminating zero. As well as fixing this, I
5545 have increased the buffer size to 1024 (and made a note to document this).
5547 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5548 when Exim is waiting for an SMTP response from a remote server, Exim
5549 restarts its select() call on the socket, thereby resetting its timeout.
5550 This is not a problem when such interrupts are rare. Somebody set up a cron
5551 job to run exiwhat every 2 minutes, which is less than the normal select()
5552 timeout (5 or 10 minutes). This meant that the select() timeout never
5553 kicked in because it was always reset. I have fixed this by comparing the
5554 time when an interrupt arrives with the time at the start of the first call
5555 to select(). If more time than the timeout has elapsed, the interrupt is
5556 treated as a timeout.
5558 5. Some internal re-factoring in preparation for the addition of Sieve
5559 extensions (by MH). In particular, the "personal" test is moved to a
5560 separate function, and given an option for scanning Cc: and Bcc: (which is
5561 not set for Exim filters).
5563 6. When Exim created an email address using the login of the caller as the
5564 local part (e.g. when creating a From: or Sender: header line), it was not
5565 quoting the local part when it contained special characters such as @.
5567 7. Installed new OpenBSD configuration files.
5569 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5570 try to make them clearer.
5572 9. Callout options, other than the timeout value, were being ignored when
5573 verifying sender addresses in header lines. For example, when using
5575 verify = header_sender/callout=no_cache
5577 the cache was (incorrectly) being used.
5579 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5580 only the Cygwin environment.
5582 11. When return_path_on_delivery was set as a log selector, if different remote
5583 addresses in the same message used different return paths and parallel
5584 remote delivery occurred, the wrong values would sometimes be logged.
5585 (Whenever a remote delivery process finished, the return path value from
5586 the most recently started remote delivery process was logged.)
5588 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5589 lines when AUTH and/or TLS are in use. This is the "received protocol"
5590 field. Exim used to use "asmtp" for authenticated SMTP, without any
5591 indication (in the protocol name) for TLS use. Now it follows the RFC and
5592 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5593 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5594 names appear in log lines as well as in Received: header lines.
5596 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5597 extensions, and comparison tests, and to fix some bugs.
5599 14. Changes to the "personal" filter test:
5601 (1) The test was buggy in that it was just doing the equivalent of
5602 "contains" tests on header lines. For example, if a user's address was
5603 anne@some.where, the "personal" test would incorrectly be true for
5605 To: susanne@some.where
5607 This test is now done by extracting each address from the header in turn,
5608 and checking the entire address. Other tests that are part of "personal"
5609 are now done using regular expressions (for example, to check local parts
5610 of addresses in From: header lines).
5612 (2) The list of non-personal local parts in From: addresses has been
5613 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5614 taken from the Sieve specification recommendations.
5616 (3) If the message contains any header line starting with "List-" it is
5617 treated as non-personal.
5619 (4) The test for "circular" in the Subject: header line has been removed
5620 because it now seems ill-conceived.
5622 15. Minor typos in src/EDITME comments corrected.
5624 16. Installed latest exipick from John Jetmore.
5626 17. If headers_add on a router specified a text string that was too long for
5627 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5628 of string_sprintf() is now avoided.
5630 18. $message_body_size was not set (it was always zero) when running the DATA
5631 ACL and the local_scan() function.
5633 19. For the "mail" command in an Exim filter, no default was being set for
5634 the once_repeat time, causing a random time value to be used if "once" was
5635 specified. (If the value happened to be <= 0, no repeat happened.) The
5636 default is now 0s, meaning "never repeat". The "vacation" command was OK
5637 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5638 (I found it when inspecting the code).
5640 20. There is now an overall timeout for performing a callout verification. It
5641 defaults to 4 times the callout timeout, which applies to individual SMTP
5642 commands during the callout. The overall timeout applies when there is more
5643 than one host that can be tried. The timeout is checked before trying the
5644 next host. This prevents very long delays if there are a large number of
5645 hosts and all are timing out (e.g. when the network connections are timing
5646 out). The value of the overall timeout can be changed by specifying an
5647 additional sub-option for "callout", called "maxwait". For example:
5649 verify = sender/callout=5s,maxwait=20s
5651 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5652 to the end before writing, but this should make it even safer).
5654 22. Exim was forgetting that it had advertised PIPELINING for the second and
5655 subsequent messages on an SMTP connection. It was also not resetting its
5656 memory on STARTTLS and an internal HELO.
5658 23. When Exim logs an SMTP synchronization error within a session, it now
5659 records whether PIPELINING has been advertised or not.
5661 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5662 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5663 rather than long int.
5665 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5667 26. Added the never_mail option to autoreply.
5673 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5674 crash if the getsockname() call failed; this can happen if a connection is
5675 closed very soon after it is established. The problem was simply in the
5676 order in which certain operations were done, causing Exim to try to write
5677 to the SMTP stream before it had set up the file descriptor. The bug has
5678 been fixed by making things happen in the correct order.
5684 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5685 before the connection was closed, thus losing the rejection response.
5687 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5688 some early Solaris releases, but causes trouble in current releases where
5689 socklen_t is defined.
5691 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5694 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5697 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5698 that releasing the top of it at the end releases what was used for sub-
5699 expansions (unless the block got too big). However, discard this block if
5700 the first thing is a variable or header, so that we can use its block when
5701 it is dynamic (useful for very large $message_headers, for example).
5703 6. Lookups now cache *every* query, not just the most recent. A new, separate
5704 store pool is used for this. It can be recovered when all lookup caches are
5705 flushed. Lookups now release memory at the end of their result strings.
5706 This has involved some general refactoring of the lookup sources.
5708 7. Some code has been added to the store_xxx() functions to reduce the amount
5709 of flapping under certain conditions.
5711 8. log_incoming_interface used to affect only the <= reception log lines. Now
5712 it causes the local interface and port to be added to several more SMTP log
5713 lines, for example "SMTP connection from", and rejection lines.
5715 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5717 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5719 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5720 could be overwritten at the end of the current message (or the start of a
5721 new message if it was set in a HELO ACL). The value is now preserved for
5722 the duration of the SMTP connection.
5724 12. If a transport had a headers_rewrite setting, and a matching header line
5725 contained an unqualified address, that address was qualified, even if it
5726 did not match any rewriting rules. The underlying bug was that the values
5727 of the flags that permit the existence of unqualified sender and recipient
5728 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5729 non-local messages, and by -bnq for local messages) were not being
5730 preserved with the message after it was received.
5732 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5733 "next input=" as part of the text comprising the host identity instead of
5734 the correct text. The code was using the same buffer for two different
5735 strings. However, depending on which order the printing function evaluated
5736 its arguments, the bug did not always show up. Under Linux, for example, my
5737 test suite worked just fine.
5739 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5740 doesn't work with some older versions of Perl. It has been changed to "my",
5741 which in any case is probably the better facility to use.
5743 15. A really picky compiler found some instances of statements for creating
5744 error messages that either had too many or two few arguments for the format
5747 16. The size of the buffer for calls to the DNS resolver has been increased
5748 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5749 for addresses that have a lot of PTR records. This alleviates a problem; it
5750 does not fully solve it.
5752 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5753 buffer now truncates the list and logs the incident, which is the same
5754 action as happens when Exim is looking up a host name and its aliases.
5755 Previously in this situation something unpredictable would happen;
5756 sometimes it was "internal error: store_reset failed".
5758 18. If a server dropped the connection unexpectedly when an Exim client was
5759 using GnuTLS and trying to read a response, the client delivery process
5760 crashed while trying to generate an error log message.
5762 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5763 string, for example:
5765 warn message = H1: something\nH2: something
5767 the text was added as a single header line from Exim's point of view
5768 though it ended up OK in the delivered message. However, searching for the
5769 second and subsequent header lines using $h_h2: did not work. This has been
5770 fixed. Similarly, if a system filter added multiple headers in this way,
5771 the routers could not see them.
5773 20. Expanded the error message when iplsearch is called with an invalid key to
5774 suggest using net-iplsearch in a host list.
5776 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5777 ACLs are no longer actually imposed (and a message to that effect is
5780 22. If a "gecos" field in a passwd entry contained escaped characters, in
5781 particular, if it contained a \" sequence, Exim got it wrong when building
5782 a From: or a Sender: header from that name. A second bug also caused
5783 incorrect handling when an unquoted " was present following a character
5784 that needed quoting.
5786 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5787 was not being matched caselessly.
5789 24. Arranged for all hyphens in the exim.8 source to be escaped with
5792 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5793 properly. Recipient callout cache records were still being keyed to include
5794 the sender, even when use_sender was set false. This led to far more
5795 callouts that were necessary. The sender is no longer included in the key
5796 when use_sender is false.
5798 26. Added "control = submission" modifier to ACLs.
5800 27. Added the ${base62d: operator to decode base 62 numbers.
5802 28. dnsdb lookups can now access SRV records.
5804 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5805 the configuration file.
5807 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5808 (-v) mode. This makes the output for a verbose queue run more intelligible.
5810 31. Added a use_postmaster feature to recipient callouts.
5812 32. Added the $body_zerocount variable, containing the number of binary zero
5813 bytes in the message body.
5815 33. The time of last modification of the "new" subdirectory is now used as the
5816 "mailbox time last read" when there is a quota error for a maildir
5819 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5821 35. Added +ignore_unknown as a special item in host lists.
5823 36. Code for decoding IPv6 addresses in host lists is now included, even if
5824 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5825 address was recognized as an IP address, but was then not correctly decoded
5826 into binary, causing unexpected and incorrect effects when compared with
5833 1. Very minor rewording of debugging text in manualroute to say "list of
5834 hosts" instead of "hostlist".
5836 2. If verify=header_syntax was set, and a header line with an unqualified
5837 address (no domain) and a large number of spaces between the end of the
5838 name and the colon was received, the reception process suffered a buffer
5839 overflow, and (when I tested it) crashed. This was caused by some obsolete
5840 code that should have been removed. The fix is to remove it!
5842 3. When running in the test harness, delay a bit after writing a bounce
5843 message to get a bit more predictability in the log output.
5845 4. Added a call to search_tidyup() just before forking a reception process. In
5846 theory, someone could use a lookup in the expansion of smtp_accept_max_
5847 per_host which, without the tidyup, could leave open a database connection.
5849 5. Added the variables $recipient_data and $sender_data which get set from a
5850 lookup success in an ACL "recipients" or "senders" condition, or a router
5851 "senders" option, similar to $domain_data and $local_part_data.
5853 6. Moved the writing of debug_print from before to after the "senders" test
5856 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5857 problems for message scanning, either using a data ACL, or using
5858 local_scan() because the Received: header was not generated till after they
5859 were called (in order to set the time as the time of reception completion).
5860 I have revised the way this works. The header is now generated after the
5861 body is received, but before the ACL or local_scan() are called. After they
5862 are run, the timestamp in the header is updated.
5868 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5869 before starting a queue runner without re-exec. This happened only when
5870 deliver_drop_privilege was set or when the Exim user was set to root. The
5871 effect of the bug was that timeouts during subsequent deliveries caused
5872 crashes instead of being properly handled. The handler is now left at its
5873 default (and expected) setting.
5875 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5876 message, again when deliver_drop_privilege is set or Exim is run as root.
5877 The bug described in (1) was not present in this case, but the tidying up
5878 of the other signals was missing. I have made the two cases consistent.
5880 3. The ignore_target_hosts setting on a manualroute router was being ignored
5881 for hosts that were looked up using the /MX notation.
5883 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5886 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5887 operated on the sender address. After changing the $sender_address to <>
5888 for the sender address verify, Exim was re-instated it as the original
5889 (before rewriting) address, but remembering that it had rewritten it, so it
5890 wasn't rewriting it again. This bug also had the effect of breaking the
5891 sender address verification caching when the sender address was rewritten.
5893 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5894 This has been changed so that if the ip literal address matches
5895 ignore_target_hosts, the router declines.
5897 7. Added expansion conditions match_domain, match_address, and match_local_
5898 part (NOT match_host).
5900 8. The placeholder for the Received: header didn't have a length field set.
5902 9. Added code to Exim itself and to exim_lock to test for a specific race
5903 condition that could lead to file corruption when using MBX delivery. The
5904 issue is with the lockfile that is created in /tmp. If this file is removed
5905 after a process has opened it but before that process has acquired a lock,
5906 there is the potential for a second process to recreate the file and also
5907 acquire a lock. This could lead to two Exim processes writing to the file
5908 at the same time. The added code performs the same test as UW imapd; it
5909 checks after acquiring the lock that its file descriptor still refers to
5910 the same named file.
5912 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5913 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5916 11. Added the smtp_active_hostname option. If used, this will typically be made
5917 to depend on the incoming interface address. Because $interface_address is
5918 not set up until the daemon has forked a reception process, error responses
5919 that can happen earlier (such as "too many connections") no longer contain
5922 12. If an expansion in a condition on a "warn" statement fails because a lookup
5923 defers, the "warn" statement is abandoned, and the next ACL statement is
5924 processed. Previously this caused the whole ACL to be aborted.
5926 13. Added the iplsearch lookup type.
5928 14. Added ident_timeout as a log selector.
5930 15. Added tls_certificate_verified as a log selector.
5932 16. Added a global option tls_require_ciphers (compare the smtp transport
5933 option of the same name). This controls incoming TLS connections.
5935 17. I finally figured out how to make tls_require_ciphers do a similar thing
5936 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5937 before starting the TLS session.
5939 18. Tabs are now shown as \t in -bP output.
5941 19. If the log selector return_path_on_delivery was set, Exim crashed when
5942 bouncing a message because it had too many Received: header lines.
5944 20. If two routers both had headers_remove settings, and the first one included
5945 a superfluous trailing colon, the final name in the first list and the
5946 first name in the second list were incorrectly joined into one item (with a
5947 colon in the middle).
5953 1. Added -C and -D options to the exinext utility, mainly to make it easier
5954 to include in the automated testing, but these could be helpful when
5955 multiple configurations are in use.
5957 2. The exinext utility was not formatting the output nicely when there was
5958 an alternate port involved in the retry record key, nor when there was a
5959 message id as well (for retries that were specific to a specific message
5960 and a specific host). It was also confused by IPv6 addresses, because of
5961 the additional colons they contain. I have fixed the IPv4 problem, and
5962 patched it up to do a reasonable job for IPv6.
5964 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5965 delivery, the log line now contains "pipelined" if PIPELINING was used.
5967 4. An SMTP transport process used to panic and die if the bind() call to set
5968 an explicit outgoing interface failed. This has been changed; it is now
5969 treated in the same way as a connect() failure.
5971 5. A reference to $sender_host_name in the part of a conditional expansion
5972 that was being skipped was still causing a DNS lookup. This no longer
5975 6. The def: expansion condition was not recognizing references to header lines
5976 that used bh_ and bheader_.
5978 7. Added the _cache feature to named lists.
5980 8. The code for checking quota_filecount in the appendfile transport was
5981 allowing one more file than it should have been.
5983 9. For compatibility with Sendmail, the command line option
5991 and sets the incoming protocol and host name (for trusted callers). The
5992 host name and its colon can be omitted when only the protocol is to be set.
5993 Note the Exim already has two private options, -pd and -ps, that refer to
5994 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5995 "s", but I don't think that's a major issue.
5997 10. A number of refactoring changes to the code, none of which should affect
6000 (a) The number of logging options was getting close to filling up the
6001 32-bit word that was used as a bit map. I have split them into two classes:
6002 those that are passed in the argument to log_write(), and those that are
6003 only ever tested independently outside of that function. These are now in
6004 separate 32-bit words, so there is plenty of room for expansion again.
6005 There is no change in the user interface or the logging behaviour.
6007 (b) When building, for example, log lines, the code previously used a
6008 macro that called string_cat() twice, in order to add two strings. This is
6009 not really sufficiently general. Furthermore, there was one instance where
6010 it was actually wrong because one of the argument was used twice, and in
6011 one call a function was used. (As it happened, calling the function twice
6012 did not affect the overall behaviour.) The macro has been replaced by a
6013 function that can join an arbitrary number of extra strings onto a growing
6016 (c) The code for expansion conditions now uses a table and a binary chop
6017 instead of a serial search (which was left over from when there were very
6018 few conditions). Also, it now recognizes conditions like "pam" even when
6019 the relevant support is not compiled in: a suitably worded error message is
6020 given if an attempt is made to use such a condition.
6022 11. Added ${time_interval:xxxxx}.
6024 12. A bug was causing one of the ddress fields not to be passed back correctly
6025 from remote delivery subprocesses. The field in question was not being
6026 subsequently used, so this caused to problems in practice.
6028 13. Added new log selectors queue_time and deliver_time.
6030 14. Might have fixed a bug in maildirsizefile handling that threw up
6031 "unexpected character" debug warnings, and recalculated the data
6032 unnecessarily. In any case, I expanded the warning message to give more
6035 15. Added the message "Restricted characters in address" to the statements in
6036 the default ACL that block characters like @ and % in local parts.
6038 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6039 Three changes have been made:
6041 (a) There was a serious bug; a negative response to MAIL caused the whole
6042 recipient domain to be cached as invalid, thereby blocking all messages
6043 to all local parts at the same domain, from all senders. This bug has
6044 been fixed. The domain is no longer cached after a negative response to
6045 MAIL if the sender used is not empty.
6047 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6050 (c) A new callout option, "use_sender" has been added for people who want
6051 the modified behaviour.
6057 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6060 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6061 indeed breaks things for older releases.
6063 3. Added additional logging to the case where there is a problem reading data
6064 from a filter that is running in a subprocess using a pipe, in order to
6065 try to track down a specific problem.
6067 4. Testing facility fudge: when running in the test harness and attempting
6068 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6069 getting "No route to host". Convert this to a timeout.
6071 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6074 6. Some OS don't have socklen_t but use size_t instead. This affects the
6075 fifth argument of getsockopt() amongst other things. This is now
6076 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6077 can be set for individual OS. I have set it for SunOS5, OSF1, and
6078 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6079 some earlier ones do not.
6081 7. Change 4.30/15 was not doing the test caselessly.
6083 8. The standard form for an IPv6 address literal was being rejected by address
6084 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6085 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6086 this, as well as the form without the "IPv6" on the front (but only when
6087 address literals are enabled, of course).
6089 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6091 10. Exim crashed if a message with an empty sender address specified by -f
6092 encountered a router with an errors_to setting. This could be provoked only
6093 by a command such as
6097 where an empty string was supplied; "<>" did not hit this bug.
6099 11. Installed PCRE release 4.5.
6101 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6102 remained set. It is now erased.
6104 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6105 times from message ids (which are base 36 rather than the normal 62).
6107 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6108 were being counted as actual protocol errors, and logged if the log
6109 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6110 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6111 and DATA following a set of rejected RCPTs do not count as protocol errors.
6112 In other words, Exim assumes they were pipelined, though this may not
6113 actually be the case. Of course, in all cases the client gets an
6114 appropriate error code.
6116 15. If a lookup fails in an ACL condition, a message about the failure may
6117 be available; it is used if testing the ACL cannot continue, because most
6118 such messages specify what the cause of the deferral is. However, some
6119 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6120 that caused an old message to be retained and used if a later statement
6121 caused a defer, replacing the real cause of the deferral.
6123 16. If an IP address had so many PTR records that the DNS lookup buffer
6124 was not large enough to hold them, Exim could crash while trying to process
6125 the truncated data. It now detects and logs this case.
6127 17. Further to 4.21/58, another change has been made: if (and only if) the
6128 first line of a message (the first header line) ends with CRLF, a bare LF
6129 in a subsequent header line has a space inserted after it, so as not to
6130 terminate the header.
6132 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6133 unnecessarily, used atoi() instead of strtol(), and didn't check the
6134 termination when getting file sizes from file names by regex.
6136 19. Completely re-implemented the support for maildirsize files, in the light
6137 of a number of problems with the previous contributed implementation
6138 (4.30/29). In particular:
6140 . If the quota is zero, the maildirsize file is maintained, but no quota is
6143 . If the maildir directory does not exist, it is created before any attempt
6144 to write a maildirsize file.
6146 . The quota value in the file is just a cache; if the quota is changed in
6147 the transport, the new value overrides.
6149 . A regular expression is available for excluding directories from the
6152 20. The autoreply transport checks the characters in options that define the
6153 message's headers; it allows continued headers, but it was checking with
6154 isspace() after an embedded newline instead of explicitly looking for a
6157 21. If all the "regular" hosts to which an address was routed had passed their
6158 expiry times, and had not reached their retry times, the address was
6159 bounced, even if fallback hosts were defined. Now Exim should go on to try
6162 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6163 equivalent code in the SMTP transport. Some hosts send humungous responses
6164 to HELO/EHLO, more than 1024 it seems.
6166 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6167 gives compiler warnings in some environments. I've now done it "properly",
6170 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6171 (because of problems with the built-in one) was declared to return uschar *
6172 instead of char *, causing compiler failure.
6174 25. Fixed a file descriptor leak when processing alias/forward files.
6176 26. Fixed a minor format string issue in dbfn.c.
6178 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6180 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6181 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6184 29. When a sender address is verified, it is cached, to save repeating the test
6185 when there is more than one recipient in a message. However, when the
6186 verification involves a callout, it is possible for different callout
6187 options to be set for different recipients. It is too complicated to keep
6188 track of this in the cache, so now Exim always runs a verification when a
6189 callout is required, relying on the callout cache for the optimization.
6190 The overhead is duplication of the address routing, but this should not be
6193 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6194 to be verified with callout=postmaster, and the main callout worked but the
6195 postmaster check failed, the verification correctly failed. However, if a
6196 subsequent RCPT command asked for sender verification *without* the
6197 postmaster check, incorrect caching caused this verification also to fail,
6200 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6201 it was not caching the DNS options (qualify_single, search_parents) that
6202 were used when the lookup failed. A subsequent lookup with different
6203 options therefore always gave the same answer, though there were cases
6204 where it should not have. (Example: a "domains = !$mx_any" option on a
6205 dnslookup router: the "domains" option is always processed without any
6206 widening, but the router might have qualify_single set.) Now Exim uses the
6207 cached value only when the same options are set.
6209 32. Added John Jetmore's "exipick" utility to the distribution.
6211 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6212 than a timeout (e.g. a certificate is required, and is not provided), an
6213 Exim server now closes the connection immediately. Previously it waited for
6214 the client to close - but if the client is SSL, it seems that they each
6215 wait for each other, leading to a delay before one of them times out.
6217 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6218 maintained 0.8.x compatibility because I don't think many are using it, and
6219 it is clearly obsolete.
6221 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6224 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6225 client certificate was expired. A simple patch fixes this, though I don't
6226 understand the full logic of why the verify callback is called multiple
6229 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6230 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6231 which causes problems with some clients (such as the Certicom SSL Plus
6232 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6233 disables the coutermeasure allowing Eudora to connect."
6235 38. Exim was not checking that a write() to a log file succeeded. This could
6236 lead to Bad Things if a log got too big, in particular if it hit a file
6237 size limit. Exim now panics and dies if it cannot write to a log file, just
6238 as it does if it cannot open a log file.
6240 39. Modified OS/Makefile-Linux so that it now contains
6242 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6244 The two -D definitions ensure that Exim is compiled with large file
6245 support, which makes it possible to handle log files that are bigger than
6248 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6249 instance) a domain was checked against a named list that involved a lookup,
6250 causing $domain_data to be set, then another domain was checked against the
6251 same list, then the first domain was re-checked, the value of $domain_data
6252 after the final check could be wrong. In particular, if the second check
6253 failed, it could be set empty. This bug probably also applied to
6256 41. The strip_trailing_dot option was not being applied to the address given
6257 with the -f command-line option.
6259 42. The code for reading a message's header from the spool was incrementing
6260 $received_count, but never initializing it. This meant that the value was
6261 incorrect (doubled) while delivering a message in the same process in which
6262 it was received. In the most common configuration of Exim, this never
6263 happens - a fresh exec is done - but it can happen when
6264 deliver_drop_privilege is set.
6266 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6267 it now includes up to 150 characters of the unexpected data in the log
6270 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6271 and building data strings. The size of both of these buffers was 10 000
6272 bytes - far larger than anybody would *ever* want, thought I. Needless to
6273 say, somebody hit the limit. I have increased the maximum line length to
6274 20 000 and the maximum data length of concatenated lines to 100 000. I have
6275 also fixed two bugs, because there was no checking on these buffers. Tsk,
6276 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6277 buffer is too small.
6279 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6280 lsearch lookups. Now it does.
6282 46. When parsing a route_list item in a manualroute router, a fixed-length
6283 buffer was used for the list of hosts. I made this 1024 bytes long,
6284 thinking that nobody would ever have a list of hosts that long. Wrong.
6285 Somebody had a whole pile of complicated expansion conditions, and the
6286 string was silently truncated, leading to an expansion error. It turns out
6287 that it is easier to change to an unlimited length (owing to other changes
6288 that have happened since this code was originally written) than to build
6289 structure for giving a limitation error. The length of the item that
6290 expands into the list of hosts is now unlimited.
6292 47. The lsearch lookup could not handle data where the length of text line was
6293 more than 4095 characters. Such lines were truncated, leading to shortened
6294 data being returned. It should now handle lines of any length.
6296 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6297 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6300 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6301 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6302 no longer happens in comment lines. A list of replacements is now placed
6303 at the head of all of the source files, except those whose only change is
6304 to replace PERL_COMMAND in the very first #! line.
6306 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6307 messages on the queue, with a bottom-up merge sort, using code contributed
6308 by Michael Haardt. This should make operations like -bp somewhat faster on
6309 large queues. It won't affect queue runners, except when queue_run_in_order
6312 51. Installed eximstats 1.31 in the distribution.
6314 52. Added support for SRV lookups to the dnslookup router.
6316 53. If an ACL referred to $message_body or $message_body_end, the value was not
6317 reset for any messages that followed in the same SMTP session.
6319 54. The store-handling optimization for building very long strings was not
6320 differentiating between the different store pools. I don't think this
6321 actually made any difference in practice, but I've tidied it.
6323 55. While running the routers to verify a sender address, $sender_address
6324 was still set to the sender address. This is wrong, because when routing to
6325 send a bounce to the sender, it would be empty. Therefore, I have changed
6326 it so that, while verifying a sender address, $sender_address is set to <>.
6327 (There is no change to what happens when verifying a recipient address.)
6329 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6330 target A or AAAA records (if not already returned) without resetting the
6331 qualify_single or search_parents options of the DNS resolver. These are
6332 inappropriate in this case because the targets of MX and SRV records must
6333 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6334 target that, when qualified, matched something in the local domain. These
6335 two options are now turned off when doing these lookups.
6337 57. It seems that at least some releases of Reiserfs (which does not have the
6338 concept of a fixed number of inodes) returns zero and not -1 for the
6339 number of available inodes. This interacted badly with check_spool_inodes,
6340 which assumed that -1 was the "no such thing" setting. What I have done is
6341 to check that the total number of inodes is greater than zero before doing
6342 the test of how many are available.
6344 58. When a "warn" ACL statement has a log_message modifier, the message is
6345 remembered, and not repeated. This is to avoid a lot of repetition when a
6346 message has many recipients that cause the same warning to be written.
6347 However, Exim was preserving the list of already written lines for an
6348 entire SMTP session, which doesn't seem right. The memory is now reset if a
6349 new message is started.
6351 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6352 debugging output unless log_rewrite was also set.
6354 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6355 of (int)(handle) when we know that handle contains (void *)(-1).
6357 61. The Exim daemon panic-logs an error return when it closes the incoming
6358 connection. However "connection reset by peer" seems to be common, and
6359 isn't really an error worthy of noting specially, so that particular error
6362 62. When Exim is trying to find all the local interfaces, it used to panic and
6363 die if the ioctl to get the interface flags failed. However, it seems that
6364 on at least one OS (Solaris 9) it is possible to have an interface that is
6365 included in the list of interfaces, but for which you get a failure error
6366 for this call. This happens when the interface is not "plumbed" into a
6367 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6368 failure of the "get flags" call assumes that the interface is down.
6370 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6371 makes life easier for people who are doing arithmetic on fields extracted
6372 from dates, where you often get leading zeros that should not be
6373 interpreted as octal.
6375 64. Added qualify_domain to the redirect router, to override the global
6378 65. If a pathologically long header line contained very many addresses (the
6379 report of this problem mentioned 10 000) and each of them was rewritten,
6380 Exim could use up a very large amount of memory. (It kept on making new
6381 copies of the header line as it rewrote, and never released the old ones.)
6382 At the expense of a bit more processing, the header rewriting function has
6383 been changed so that it no longer eats memory in this way.
6385 66. The generation of the Received: header has been moved from the time that a
6386 message starts to be received, to the time that it finishes. The timestamp
6387 in the Received: header should now be very close to that of the <= log
6388 line. There are two side-effects of this change:
6390 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6391 logged header lines no longer include the local Received: line, because
6392 it has not yet been created. The same applies to a copy of the message
6393 that is returned to a non-SMTP sender when a message is rejected.
6395 (b) When a filter file is tested using -bf, no additional Received: header
6396 is added to the test message. After some thought, I decided that this
6399 This change does not affect the value of $received_for. It is still set
6400 after address rewriting, but before local_scan() is called.
6402 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6404 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6405 gave an unhelpful panic error message, and a defer error. I have managed to
6406 change this behaviour so that it now rejects any supplied certificate,
6407 which seems right, as the list of acceptable certificates is empty.
6409 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6410 gave an unhelpful defer error. I have not managed to make this reject any
6411 supplied certificates, but the error message it gives is "no certificate
6412 supplied", which is not helpful.
6414 70. exigrep's output now also includes lines that are not associated with any
6415 message, but which match the given pattern. Implemented by a patch from
6416 Martin Sluka, which also tidied up the Perl a bit.
6418 71. Recipient callout verification, like sender verification, was using <> in
6419 the MAIL FROM command. This isn't really the right thing, since the actual
6420 sender may affect whether the remote host accepts the recipient or not. I
6421 have changed it to use the actual sender in the callout; this means that
6422 the cache record is now keyed on a recipient/sender pair, not just the
6423 recipient address. There doesn't seem to be a real danger of callout loops,
6424 since a callout by the remote host to check the sender would use <>.
6425 [SEE ABOVE: changed after hitting problems.]
6427 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6428 temporary errors. However, in the case of such a code being given after
6429 the end of a data transmission (i.e. after ".") Exim was failing to write
6430 a retry record for the message. (Yes, there was some broken host that was
6431 actually sending 8xx at this point.)
6433 73. An unknown lookup type in a host list could cause Exim to panic-die when
6434 the list was checked. (An example that provoked this was putting <; in the
6435 middle of a list instead of at the start.) If this happened during a DATA
6436 ACL check, a -D file could be left lying around. This kind of configuration
6437 error no longer causes Exim to die; instead it causes a defer error. The
6438 incident is still logged to the main and panic logs.
6440 74. Buglet left over from Exim 3 conversion. The message "too many messages
6441 in one connection" was written to the rejectlog but not the mainlog, except
6442 when address rewriting (yes!) was being logged.
6444 75. Added write_rejectlog option.
6446 76. When a system filter was run not as root (that is, when system_filter_user
6447 was set), the values of the $n variables were not being returned to the
6448 main process; thus, they were not subsequently available in the $sn
6451 77. Added +return_path_on_delivery log selector.
6453 78. A connection timeout was being treated differently from recipients deferred
6454 when testing hosts_max_try with a message that was older than the host's
6455 retry timeout. (The host should not be counted, thus allowing all hosts to
6456 be tried at least once before bouncing.) This may have been the cause of an
6457 occasionally reported bug whereby a message would remain on the queue
6458 longer than the retry timeout, but would be bounced if a delivery was
6459 forced. I say "may" because I never totally pinned down the problem;
6460 setting up timeout/retry tests is difficult. See also the next item.
6462 79. The ultimate address timeout was not being applied to errors that involved
6463 a combination of host plus message (for example, a timeout on a MAIL
6464 command). When an address resolved to a number of possible hosts, and they
6465 were not all tried for each delivery (e.g. because of hosts_max_try), a
6466 message could remain on the queue longer than the retry timeout.
6468 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6471 81. Fixed an obscure SMTP outgoing bug which required at least the following
6472 conditions: (a) there was another message waiting for the same server;
6473 (b) the server returned 5xx to all RCPT commands in the first message so
6474 that the message was not completed; (c) the server dropped the connection
6475 or gave a negative response to the RSET that Exim sends to abort the
6476 transaction. The observed case was a dropped connection after DATA that had
6477 been sent in pipelining mode. That is, the server had advertised PIPELINING
6478 but was not implementing it correctly. The effect of the bug was incorrect
6479 behaviour, such as trying another host, and this could lead to a crash.
6485 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6486 and daemon.c were passed as pointers to ints; they should have been
6487 pointers to socklen_t variables (which are typically unsigned ints).
6489 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6492 3. Fixed a really odd bug that affected only the testing scheme; patching a
6493 certain fixed string in the binary changed the value of another string that
6494 happened to be identical to the end of the original first string.
6496 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6497 name", it returns that address as the IP address. On some operating
6498 systems (e.g. Solaris), it also passes back the IP address string as the
6499 "host name". However, on others (e.g. Linux), it passes back an empty
6500 string. Exim wasn't checking for this, and was changing the host name to an
6501 empty string, assuming it had been canonicalized.
6503 5. Although rare, it is permitted to have more than one PTR record for a given
6504 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6505 all the names associated with an address, because they do in Solaris.
6506 However, it seems that they do not in Linux for data that comes from the
6507 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6508 I found this out when I moved to a new Linux workstation and tried to run
6509 the Exim test suite.
6511 To get round this problem I have changed the code so that it now does its
6512 own call to the DNS to look up PTR records when searching for a host name.
6513 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6514 addresses that are only in /etc/hosts are still found.
6516 This behaviour is, however, controlled by an option called host_lookup_
6517 order, which defaults to "bydns:byaddr". If people want to use the other
6518 order, or indeed, just use one or the other means of lookup, they can
6519 specify it in this variable.
6521 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6522 some operating systems, this comes back from gethostbyaddr() as an empty
6523 string, and this is what Exim used to test for. However, it seems that in
6524 other systems, "." is yielded. Exim now tests for this case too.
6526 7. The values of check_spool_space and check_log_space are now held internally
6527 as a number of kilobytes instead of an absolute number of bytes. If a
6528 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6529 kilobyte. This means that much larger values can be stored.
6531 8. Exim monitor: an attempt to get the action menu when not actually pointing
6532 at a message produces an empty menu entitled "No message selected". This
6533 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6534 no entries in it ("Shell widget menu has zero width and/or height"). So I
6535 have added a single, blank menu entry in this case.
6537 9. Added ${quote_local_part.
6539 10. MIME decoding is now applied to the contents of Subject: header lines when
6542 11. Now that a reference to $sender_host_address automatically causes a reverse
6543 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6544 host lookup before query-style lookups in lists that might use this
6545 variable. This has therefore been abolished, and the "net-" prefix is no
6546 longer necessary for query-style lookups.
6548 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6549 have been a typo for LFLAGS, so it has been changed.
6551 13. The install script calls Exim with "-C /dev/null" in order to find the
6552 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6553 to be output. However, since Exim outputs its version number before the
6554 error, it didn't break the script. It just looked ugly. I fixed this by
6555 always allowing "-C /dev/null" if the caller is root.
6557 14. Ignore overlarge ACL variable number when reading spool file - insurance
6558 against a later release with more variables having written the file.
6560 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6561 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6562 this, as well as the form without the "IPv6" on the front.
6564 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6565 OS/Makefile-Darwin file.
6567 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6568 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6570 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6571 variable. However, some OS use ints for inodes. I've added cast to long int
6572 to get rid of the compiler warning.
6574 19. I had forgotten to lock out "/../" in configuration file names when
6575 ALT_CONFIG_PREFIX was set.
6577 20. Routers used for verification do not need to specify transports. However,
6578 if such a router generated a host list, and callout was configured, Exim
6579 crashed, because it could not find a port number from the (non-existent)
6580 transport. It now assumes port 25 in this circumstance.
6582 21. Added the -t option to exigrep.
6584 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6585 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6586 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6587 them is set, LOOKUP_LSEARCH is forced.
6589 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6591 24. Added sender and host information to the "rejected by local_scan()" log
6592 line; previously there was no indication of these.
6594 25. Added .include_if_exists.
6596 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6597 Linux. It turns out that not all file systems support this. Apparently some
6598 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6599 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6600 not supported on the file descriptor, is now ignored when Exim is trying to
6601 sync a directory. This applies only to Linux.
6603 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6605 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6606 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6609 29. Added support for maildirsize files from supplied patch (modified a bit).
6611 30. The use of :fail: followed by an empty string could lead Exim to respond to
6612 sender verification failures with (e.g.):
6614 550 Verification failed for <xxx>
6615 550 Sender verify failed
6617 where the first response line was missing the '-' that indicates it is not
6618 the final line of the response.
6620 31. The loop for finding the name of the user that called Exim had a hardwired
6621 limit of 10; it now uses the value of finduser_retries, which is used for
6622 all other user lookups.
6624 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6627 33. Exim was neglecting to zero errno before one call of strtol() when
6628 expanding a string and expecting an integer value. On some systems this
6629 resulted in spurious "integer overflow" errors. Also, it was casting the
6630 result into an int without checking.
6632 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6633 did not work. The code looks as if it has *never* worked, though it appears
6634 to have been documented since at least release 1.62. I have made it work.
6636 35. The "timeout_DNS" error in retry rules, also documented since at least
6637 1.62, also never worked. As it isn't clear exactly what this means, and
6638 clearly it isn't a major issue, I have abolished the feature by treating it
6639 as "timeout", and writing a warning to the main and panic logs.
6641 36. The display of retry rules for -brt wasn't always showing the error code
6644 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6645 timeout_connect_A, timeout_connect_MX.
6647 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6648 to the empty sender.
6650 39. The daemon was not analysing the content of -oX till after it had closed
6651 stderr and disconnected from the controlling terminal. This meant that any
6652 syntax errors were only noted on the panic log, and the return code from
6653 the command was 0. By re-arranging the code a little, I've made the
6654 decoding happen first, so such errors now appear on stderr, and the return
6655 code is 1. However, the actual setting up of the sockets still happens in
6656 the disconnected process, so errors there are still only recorded on the
6659 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6660 connections (as happens on some IP stacks) was logged at start up time as
6661 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6662 it from "IPv6 and IPv4", which means that two separate sockets are being
6665 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6666 says whether AF_INET or AF_INET6 was passed as an argument.
6668 42. Exiwhat output was messed up when time zones were included in log
6671 43. Exiwhat now gives more information about the daemon's listening ports,
6672 and whether -tls-on-connect was used.
6674 44. The "port" option of the smtp transport is now expanded.
6676 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6677 silently ignored. Now an error message is written to the main and panic
6680 46. There's a new ACL modifier called "logwrite" which writes to a log file
6681 as soon as it is encountered.
6683 47. Added $local_user_uid and $local_user_gid at routing time.
6685 48. Exim crashed when trying to verify a sender address that was being
6688 49. Exim was recognizing only a space character after ".include". It now also
6689 recognizes a tab character.
6691 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6692 extracting the relevant information from the specification. The man page no
6693 longer contains scrambled data for the -d option, and I've added a section
6694 at the front about calling Exim under different names.
6696 51. Added "extra_headers" argument to the "mail" command in filter files.
6698 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6701 53. Installed eximstats 1.29.
6703 54. Added transport_filter_timeout as a generic transport option.
6705 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6706 Cc: header lines. This was required by RFC 822, but it not required by RFC
6709 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6710 incoming messages that did not have them. Now it does so only if the
6711 message originates locally, that is, if there is no associated remote host
6712 address. When Resent- header lines are present, this applies to the Resent-
6713 lines rather than the non-Resent- lines.
6715 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6716 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6718 58. Messages for configuration errors now include the name of the main
6719 configuration file - useful now that there may be more than one file in a
6720 list (.included file names were always shown).
6722 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6723 for those rare installations that do not start the daemon as root or run it
6724 setuid root. I've cut out the call to initgroups() if the daemon is not
6727 60. The Exim user and group can now be bound into the binary as text strings
6728 that are looked up at the start of Exim's processing.
6730 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6732 62. Added $mailstore_basename variable.
6734 63. Installed patch to sieve.c from Michael Haardt.
6736 64. When Exim failed to open the panic log after failing to open the main log,
6737 the original message it was trying to log was written to stderr and debug
6738 output, but if they were not available (the usual case in production), it
6739 was lost. Now it is written to syslog before the two lines that record the
6740 failures to open the logs.
6742 65. Users' Exim filters run in subprocesses under the user's uid. It is
6743 possible for a "deliver" command or an alias in a "personal" command to
6744 provoke an address rewrite. If logging of address rewriting is configured,
6745 this fails because the process is not running as root or exim. There may be
6746 a better way of dealing with this, but for the moment (because 4.30 needs
6747 to be released), I have disabled address rewrite logging when running a
6748 filter in a non-root, non-exim process.
6754 1. The buildconfig auxiliary program wasn't quoting the value set for
6755 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6756 not defined. This bug was masked in 4.22 by the effect that was fixed in
6759 2. Some messages that were rejected after a message id was allocated were
6760 shown as "incomplete" by exigrep. It no longer does this for messages that
6761 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6763 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6764 have allow_domain_literals set, the ID did not get logged in the <= line.
6765 Domain literals are now always recognized in Message-ID: header lines.
6767 4. The first argument for a ${extract expansion item is the key name or field
6768 number. Leading and trailing spaces in this item were not being ignored,
6769 causing some misleading effects.
6771 5. When deliver_drop_privilege was set, single queue runner processes started
6772 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6773 same command in the process it spins off) were not dropping privilege.
6775 6. When the daemon running as "exim" started a queue runner, it always
6776 re-executed Exim in the spun-off process. This is a waste of effort when
6777 deliver_drop_privilege is set. The new process now just calls the
6778 queue-runner function directly.
6784 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6787 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6788 ignored. Though the use of -oP was forcing the writing of a pid file, it
6789 was always written to the default place.
6791 3. If the message "no IP address found for host xxxx" is generated during
6792 incoming verification, it is now followed by identification of the incoming
6793 connection (so you can more easily find what provoked it).
6795 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6797 5. Added some features to "harden" Exim a bit more against certain attacks:
6799 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6800 be put in Local/Makefile. This is like the never_users runtime option,
6801 but it cannot be overridden. The default setting is "root".
6803 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6804 prefix string with which any file named in a -C command line option
6807 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6808 is retained for -C and -D only if the caller of Exim is root. Without
6809 it, the exim user may also use -C and -D and retain privilege.
6811 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6812 command line option is disabled.
6814 6. Macro names set by the -D option must start with an upper case letter, just
6815 like macro names defined in the configuration file.
6817 7. Added "dereference=" facility to LDAP.
6819 8. Two instances of the typo "uknown" in the source files are fixed.
6821 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6822 the Configure-Makefile script screwed up while processing it.
6824 10. Incorporated PCRE 4.4.
6826 11. The SMTP synchronization check was not operating right at the start of an
6827 SMTP session. For example, it could not catch a HELO sent before the client
6828 waited for the greeting. There is now a check for outstanding input at the
6829 point when the greeting is written. Because of the duplex, asynchronous
6830 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6831 way, but not yet received, when the check is performed.
6833 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6834 on TCP/IP sockets, because this apparently causes some broken clients to
6837 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6838 unchanged) from the Cygwin maintainer.
6840 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6841 was supported instead of testing for mbx. Effectively a typo.
6843 15. The spa authenticator server code was not checking that the input it
6844 received was valid base64.
6846 16. The debug output line for the "set" modifier in ACLs was not showing the
6847 name of the variable that was being set.
6849 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6851 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6852 lookup on its own. Something else was needed to trigger the lookup. For
6853 example, a match in host_lookup or the need for a host name in a host list.
6854 Now, if $sender_host_name is referenced and the host name has not yet been
6855 looked up, a lookup is performed. If the lookup fails, the variable remains
6856 empty, and $host_lookup_failed is set to "1".
6858 19. Added "eqi" as a case-independent comparison operator.
6860 20. The saslauthd authentication condition could segfault if neither service
6861 nor realm was specified.
6863 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6864 error message that was logged was misleading, and incoming SMTP
6865 connections were dropped. The message is now more accurate, and temporary
6866 errors are given to SMTP connections.
6868 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6869 (except RSET) with a 421 error, until QUIT is received. However, it was
6870 failing to send a response to QUIT.
6872 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6873 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6874 ACL is now run after the helo_try_verify_hosts code.
6876 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6877 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6878 case-independent, so other case variants are also recognized). Apparently
6879 some systems use these upper case variants.
6881 25. If more than two messages were waiting for the same host, and a transport
6882 filter was specified for the transport, Exim sent two messages over the
6883 same TCP/IP connection, and then failed with "socket operation on non-
6884 socket" when it tried to send the third.
6886 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6888 27. The extern definition of crypt16() in expand.c was not being excluded when
6889 the OS had its own crypt16() function.
6891 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6892 as a preferred synonym for return_size_limit, both as an option and as an
6895 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6897 30. Changed the default configuration ACL to relax the local part checking rule
6898 for addresses that are not in any local domains. For these addresses,
6899 slashes and pipe symbols are allowed within local parts, but the sequence
6900 /../ is explicitly forbidden.
6902 31. SPA server authentication was not clearing the challenge buffer before
6905 32. log_message in a "warn" ACL statement was writing to the reject log as
6906 well as to the main log, which contradicts the documentation and doesn't
6907 seem right (because no rejection is happening). So I have stopped it.
6909 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6910 However, I am unable to do any testing of this.
6912 34. Fixed an infelicity in the appendfile transport. When checking directories
6913 for a mailbox, to see if any needed to be created, it was accidentally
6914 using path names with one or more superfluous leading slashes; tracing
6915 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6917 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6918 contents are added to the log line that is written for every discarded
6919 recipient. (Previously a log_message setting was ignored.)
6921 36. The ${quote: operator now quotes the string if it is empty.
6923 37. The install script runs exim in order to find its version number. If for
6924 some reason other than non-existence or emptiness, which it checks, it
6925 could not run './exim', it was installing it with an empty version number,
6926 i.e. as "exim-". This error state is now caught, and the installation is
6929 38. An argument was missing from the function that creates an error message
6930 when Exim fails to connect to the socket for saslauthd authentication.
6931 This could cause Exim to crash, or give a corrupted message.
6933 39. Added isip, isip4, and isip6 to ${if conditions.
6935 40. The ACL variables $acl_xx are now saved with the message, and can be
6936 accessed later in routers, transports, and filters.
6938 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6939 strings in the file are not string-expanded.
6941 42. If a MAIL command specified a SIZE value that was too large to fit into an
6942 int variable, the check against message_size_limit failed. Such values are
6943 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6944 day this will have to be increased, but I don't think I want to be around
6945 when emails are that large.
6952 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6953 iconv() is not standard in FreeBSD.
6955 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6956 IPv6 enabled. The observed symptom was a segmentation fault on return from
6957 the function os_common_find_running_interfaces() in src/os.c.
6959 3. In the check_special_case() function in daemon.c I had used "errno" as an
6960 argument name, which causes warnings on some systems. This was basically a
6961 typo, since it was named "eno" in the comments!
6963 4. The code that waits for the clock to tick (at a resolution of some fraction
6964 of a second) so as to ensure message-id uniqueness was always waiting for
6965 at least one whole tick, when it could have waited for less. [This is
6966 almost certainly not relevant at current processor speeds, where it is
6967 unlikely to ever wait at all. But we try to future-proof.]
6969 5. The function that sleeps for a time interval that includes fractions of a
6970 second contained a race. It did not block SIGALRM between setting the
6971 timer, and suspending (a couple of lines later). If the interval was short
6972 and the sigsuspend() was delayed until after it had expired, the suspension
6973 never ended. On busy systems this could lead to processes getting stuck for
6976 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6977 process, before it forks any delivery processes. The open lookup caching
6978 mechanism meant that the open file or database connection was passed into
6979 the delivery process. The problem was that delivery processes always tidy
6980 up cached lookup data. This could cause a problem for the next delivery
6981 process started by the queue runner, because the external queue runner
6982 process does not know about the closure. So the next delivery process
6983 still has data in the lookup cache. In the case of a file lookup, there was
6984 no problem because closing a file descriptor in a subprocess doesn't affect
6985 the parent. However, if the lookup was caching a connection to a database,
6986 the connection was closed, and the second delivery process was likely to
6987 see errors such as "PGSQL: query failed: server closed the connection
6988 unexpectedly". The problem has been fixed by closing all cached lookups
6989 in a queue runner before running a delivery process.
6991 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6992 seem to have the "const" qualifier which it has on other OS. I've
6995 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6996 *of the same type* (client or server) with the same public name that an
6997 error should be diagnosed.
6999 9. When Exim looked up a host name for an IP address, but failed to find the
7000 original IP address when looking up the host name (a safety check), it
7001 output the message "<ip address> does not match any IP for NULL", which was
7002 confusing, to say the least. The bug was that the host name should have
7003 appeared instead of "NULL".
7005 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7006 user that is built into the binary, and the -C or -D options is used, root
7007 privilege is dropped before the configuration file is read. In addition,
7008 logging is switched to stderr instead of the normal log files. If the
7009 configuration then re-defines the Exim user, the unprivileged environment
7010 is probably not what is expected, so Exim logs a panic warning message (but
7013 However, if deliver_drop_privilege is set, the unprivileged state may well
7014 be exactly what is intended, so the warning has been cut out in that case,
7015 and Exim is allowed to try to write to its normal log files.
7021 1. smtp_return_error_details was not giving details for temporary sender
7022 or receiver verification errors.
7024 2. Diagnose a configuration error if two authenticators have the same public
7027 3. Exim used not to create the message log file for a message until the first
7028 delivery attempt. This could be confusing when incoming messages were held
7029 for policy or load reasons. The message log file is now created at the time
7030 the message is received, and an initial "Received" line is written to it.
7032 4. The automatically generated man page for command line options had a minor
7033 bug that caused no ill effects; however, a more serious problem was that
7034 the procedure for building the man page automatically didn't always
7035 operate. Consequently, release 4.20 contains an out-of-date version. This
7036 shouldn't happen again.
7038 5. When building Exim with embedded Perl support, the script that builds the
7039 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7040 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7042 6. The freeze_tell option was not being used for messages that were frozen on
7043 arrival, either by an ACL or by local_scan().
7045 7. Added the smtp_incomplete_transaction log selector.
7047 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7048 was accepting AUTH without a new EHLO.
7050 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7051 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7054 10. Logging of TCP/IP connections (when configured) now happens in the main
7055 daemon process instead of the child process, so that the TCP/IP connection
7056 count is more accurate (but it can never be perfect).
7058 11. The use of "drop" in a nested ACL was not being handled correctly in the
7059 outer ACL. Now, if condition failure induced by the nested "drop" causes
7060 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7061 or "require"), the connection is dropped.
7063 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7064 that yield "discard" can now be used with an "accept" or a "discard" verb,
7065 but an error is generated for any others (because I can't see a useful way
7066 to define what should happen).
7068 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7069 are now processed in the same way as lines in the Exim configuration file.
7070 In particular, continuation lines are supported.
7072 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7074 15. Added -ti meaning -t -i.
7076 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7077 domains, and warn by logging if others are found.
7079 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7080 returned from GIFCONF when Exim is trying to find the list of interfaces on
7081 a host. The code in os.c has been modified to copy each ifreq to an aligned
7082 structure in all cases.
7084 Also, in some cases, the returned ifreq's were being copied to a 'struct
7085 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7086 means the last couple of bytes of an IPv6 address could be chopped if the
7087 ifreq contained only a normal sockaddr (14 bytes storage).
7089 18. Named domain lists were not supported in the hosts_treat_as_local option.
7090 An entry such as +xxxx was not recognized, and was treated as a literal
7093 19. Ensure that header lines added by a DATA ACL are included in the reject log
7094 if the ACL subsequently rejects the message.
7096 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7097 MD5 (which is deprecated).
7099 21. When testing a filter file using -bf, Exim was writing a message when it
7100 took the sender from a "From " line in the message, but it was not doing so
7101 when it took $return_path from a Return-Path: header line. It now does.
7103 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7104 with a valid header line field name (a series of printing characters
7105 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7107 23. Changed "disc" in the source to "disk" to conform to the documentation and
7108 the book and for uniformity.
7110 24. Ignore Sendmail's -Ooption=value command line item.
7112 25. When execve() failed while trying to run a command in a pipe transport,
7113 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7114 could be confused with a return value of 69 from the command itself. This
7115 has been changed to 127, the value the shell returns if it is asked to run
7116 a non-existent command. The wording for the related log line suggests a
7117 non-existent command as the problem.
7119 26. If received_header_text expands to an empty string, do not add a Received:
7120 header line to the message. (Well, it adds a token one on the spool, but
7121 marks it "old" so that it doesn't get used or transmitted.)
7123 27. Installed eximstats 1.28 (addition of -nt option).
7125 28. There was no check for failure on the call to getsockname() in the daemon
7126 code. This can fail if there is a shortage of resources on the system, with
7127 ENOMEM, for example. A temporary error is now given on failure.
7129 29. Contrary to the C standard, it seems that in some environments, the
7130 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7131 program. Exim now does this explicitly; it affects the formatting of
7132 timestamps using strftime().
7134 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7135 complaints. I've now initialized all the variables, to avoid this.
7137 32. Header lines added by a system filter were not being "seen" during
7138 transport-time rewrites.
7140 33. The info_callback() function passed to OpenSSL is set up with type void
7141 (*)(SSL *, int, int), as described somewhere. However, when calling the
7142 function (actually a macro) that sets it up, the type void(*)() is
7143 expected. I've put in a cast to prevent warnings from picky compilers.
7145 34. If a DNS black list lookup found a CNAME record, but there were no A
7146 records associated with the domain it pointed at, Exim crashed.
7148 35. If a DNS black list lookup returned more than one A record, Exim ignored
7149 all but the first. It now scans all returned addresses if a particular IP
7150 value is being sought. In this situation, the contents of the
7151 $dnslist_value variable are a list of all the addresses, separated by a
7154 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7155 to accept a host name and all its aliases if the forward lookup for any of
7156 them yielded the IP address of the incoming connection. Now it accepts only
7157 those names whose forward lookup yields the correct IP address. Any other
7158 names are discarded. This closes a loophole whereby a rogue DNS
7159 administrator could create reverse DNS records to break through a
7160 wildcarded host restriction in an ACL.
7162 37. If a user filter or a system filter that ran in a subprocess used any of
7163 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7164 the wrong values were passed to the pipe command ($thisaddress had the
7165 value of $0, $0 had the value of $1, etc). This bug was introduced by
7166 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7168 38. Improved the line breaking for long SMTP error messages from ACLs.
7169 Previously, if there was no break point between 40 and 75 characters, Exim
7170 left the rest of the message alone. Two changes have been made: (a) I've
7171 reduced the minimum length to 35 characters; (b) if it can't find a break
7172 point between 35 and 75 characters, it looks ahead and uses the first one
7173 that it finds. This may give the occasional overlong line, but at least the
7174 remaining text gets split now.
7176 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7177 file descriptors might be low, and that setting 1000 would always raise it.
7178 It turns out that in some environments, the limit is already over 1000 and
7179 that lowering it causes trouble. So now Exim takes care not to decrease it.
7181 40. When delivering a message, the value of $return_path is set to $sender_
7182 address at the start of routing (routers may change the value). By an
7183 oversight, this default was not being set up when an address was tested by
7184 -bt or -bv, which affected the outcome if any router or filter referred to
7187 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7188 log only when "message" or "log_message" are set. However, if one of the
7189 conditions was an address verification, or a call to a nested ACL, the
7190 messages generated by the underlying test were being passed through. This
7191 no longer happens. The underlying message is available in $acl_verify_
7192 message for both "message" and "log_message" expansions, so it can be
7193 passed through if needed.
7195 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7196 new expansion $bh_ to give the encoded byte string without charset
7197 translation. Translation happens only if iconv() is available; HAVE_ICONV
7198 indicates this at build time. HEADERS_CHARSET gives the charset to
7199 translate to; headers_charset can change it in the configuration, and
7200 "headers charset" can change it in an individual filter file.
7202 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7203 that creates RFC 2047 encoded "words" labels them as that charset instead
7204 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7205 expansion operator; (ii) when Exim creates a From: line for a local
7206 message; (iii) when a header line is rewritten to include a "phrase" part.
7208 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7209 buggy, causing it to skip the first lines of messages whose message ID
7210 ended in 'D'. This would not have bitten before Exim release 4.14, because
7211 message IDs were unlikely to end in 'D' before then. The effect was to have
7212 incorrect size information for certain domains.
7214 45. #include "config.h" was missing at the start of the crypt16.c module. This
7215 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7218 46. If there was a timeout during a "random" callout check, Exim treated it as
7219 a failure of the random address, and carried on sending RSET and the real
7220 address. If the delay was just some slowness somewhere, the response to the
7221 original RCPT would be taken as a response to RSET and so on, causing
7222 mayhem of various kinds.
7224 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7225 when I implemented it. It didn't allow for the fact that some option values
7226 may legitimately be negative (e.g. size_addition), and it didn't even do
7227 the right test for positive values.
7229 48. Domain names in DNS records are case-independent. Exim always looks them up
7230 in lower case. Some resolvers return domain names in exactly the case they
7231 appear in the zone file, that is, they may contain uppercase letters. Not
7232 all resolvers do this - some return always lower case. Exim was treating a
7233 change of case by a resolver as a change of domain, similar to a widening
7234 of a domain abbreviation. This triggered its re-routing code and so it was
7235 trying to route what was effectively the same domain again. This normally
7236 caused routing to fail (because the router wouldn't handle the domain
7237 twice). Now Exim checks for this case specially, and just changes the
7238 casing of the domain that it ultimately uses when it transmits the message
7241 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7244 50. If a filter generated a file delivery with a non-absolute name (possible if
7245 no home directory exists for the router), the forbid_file option was not
7248 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7249 the existing equality matching.
7251 52. Exim was using ints instead of ino_t variables in some places where it was
7252 dealing with inode numbers.
7254 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7255 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7256 called TMPDIR, and if it finds it is different, it changes its value.
7258 54. The smtp_printf() function is now made available to local_scan() so
7259 additional output lines can be written before returning. There is also an
7260 smtp_fflush() function to enable the detection of a dropped connection.
7261 The variables smtp_input and smtp_batched_input are exported to
7264 55. Changed the default runtime configuration: the message "Unknown user"
7265 has been removed from the ACL, and instead placed on the localuser router,
7266 using the cannot_route_message feature. This means that any verification
7267 failures that generate their own messages won't get overridden. Similarly,
7268 the "Unrouteable address" message that was in the ACL for unverifiable
7269 relay addresses has also been removed.
7271 56. Added hosts_avoid_esmtp to the smtp transport.
7273 57. The exicyclog script was not checking for the esoteric option
7274 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7275 will work only if exicyclog is run under the appropriate euid.
7277 58. Following a discussion on the list, the rules by which Exim recognises line
7278 endings on incoming messages have been changed. The -dropcr and drop_cr
7279 options are now no-ops, retained only for backwards compatibility. The
7280 following line terminators are recognized: LF CRLF CR. However, special
7281 processing applies to CR:
7283 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7284 nor a local message in the state where . is a terminator.
7286 (ii) If a bare CR is encountered in a header line, an extra space is added
7287 after the line terminator so as not to end the header. The reasoning
7288 behind this is that bare CRs in header lines are most likely either
7289 to be mistakes, or people trying to play silly games.
7291 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7292 was being incorrectly given as 18 bytes larger than it should have been.
7293 This is a VOB (very old bug).
7295 60. This may never have affected anything current, but just in case it has:
7296 When the local host is found other than at the start of a list of hosts,
7297 the local host, those with the same MX, and any that follow, are discarded.
7298 When the list in question was part of a longer list of hosts, the following
7299 hosts (not currently being processed) were also being discarded. This no
7300 longer happens. I'm not sure if this situation could ever has previously
7303 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7306 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7307 header. This is something that is recommended in a new Internet Draft, and
7308 is something that is documented as being done by Sendmail. There are two
7309 possible values. For messages generated by the autoreply transport, Exim
7312 Auto-Submitted: auto-replied
7314 whereas for all other generated messages (e.g. bounces) it adds
7316 Auto-Submitted: auto-generated
7318 63. The "personal" condition in filters now includes a test for the
7319 Auto-Submitted: header. If it contains the string "auto-" the message it
7320 not considered personal.
7322 64. Added rcpt_include_affixes as a generic transport option.
7324 65. Added queue_only_override (default true).
7326 66. Added the syslog_duplication option.
7328 67. If what should have been the first header line of a message consisted of
7329 a space followed by a colon, Exim was mis-interpreting it as a header line.
7330 It isn't of course - it is syntactically invalid and should therefore be
7331 treated as the start of the message body. The misbehaviour could have
7332 caused a number of strange effects, including loss of data in subsequent
7333 header lines, and spool format errors.
7335 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7336 client host had authenticated. This control can now be exercised by an ACL
7337 for more flexibility.
7339 69. By default, callouts do not happen when testing with -bh. There is now a
7340 variant, -bhc, which does actually run the callout code, including
7341 consulting and updating the callout cache.
7343 70. Added support for saslauthd authentication, courtesy of Alexander
7346 71. If statvfs() failed on the spool or log directories while checking their
7347 size for availability, Exim confusingly gave the error "space shortage".
7348 Furthermore, in debugging mode it crashed with a floating point exception.
7349 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7350 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7351 serious problem, Exim now writes to the main and panic logs when this
7352 happens, with details of the failure. It then refuses to accept the
7353 incoming message, giving the message "spool directory problem" or "log
7354 directory problem" with a 421 code for SMTP messages.
7356 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7357 0, 1, and 2 exist, because some OS complain for execs without them (see
7358 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7359 descriptors. However, the code omitted to check that the open succeeded,
7360 causing mysterious errors if for some reason the permissions on /dev/null
7361 got screwed. Now Exim writes a message to the main and panic logs, and
7362 bombs out if it can't open /dev/null.
7364 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7365 interact so that it is all more flexible. It is supposed to remain
7366 backwards compatible. Also added extra_local_interfaces.
7368 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7369 to bomb out with an assertion failure - to the client this appears as a
7370 connection drop. This problem occurs in the part of the code that was taken
7371 from the Samba project. Fortunately, the assertion is in a very simple
7372 function, so I have fixed this by reproducing the function inline in the
7373 one place where it is called, and arranging for authentication to fail
7374 instead of killing the process with assert().
7376 75. The SPA client code was not working when the server requested OEM rather
7377 than Unicode encoding.
7379 76. Added code to make require_files with a specific uid setting more usable in
7380 the case where statting the file as root fails - usually a non-root-mounted
7381 NFS file system. When this happens and the failure is EACCES, Exim now
7382 forks a subprocess and does the per-uid checking as the relevant uid.
7384 77. Added process_log_path.
7386 78. If log_file_path was not explicitly set, a setting of check_log_space or
7387 check_log_inodes was ignored.
7389 79. If a space check for the spool or log partitions fails, the incident is now
7390 logged. Of course, in the latter case the data may get lost...
7392 80. Added the %p formatting code to string_format() so that it can be used to
7393 print addresses in debug_print(). Adjusted all the address printing in the
7394 debugging in store.c to use %p rather than %d.
7396 81. There was a concern that a line of code in smtp_in.c could overflow a
7397 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7398 initially expressed, the concern was not well-founded, because trailing
7399 spaces are removed early. However, if the trailing spaces were followed by
7400 a NULL, they did not get removed, so the overflow was possible. Two fixes
7403 (a) I re-wrote the offending code in a cleaner fashion.
7404 (b) If an incoming SMTP command contains a NULL character, it is rejected
7407 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7408 runs initgroups(), so that if the Exim user is in any additional groups,
7409 they will be used during message reception.
7415 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob