1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
17 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
18 buffer overrun for (non-chunking) other transports.
20 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
21 TLS1.3, means that a server rejecting a client certificate is not visible
22 to the client until the first read of encrypted data (typically the
23 response to EHLO). Add detection for that case and treat it as a failed
24 TLS connection attempt, so that the normal retry-in-clear can work (if
27 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
28 and/or domain. Found and fixed by Jason Betts.
30 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
31 configuration). If a CNAME target was not a wellformed name pattern, a
34 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
35 the OS reports them interleaved with other addresses.
37 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
38 used both for input and for a verify callout, both encrypted, SMTP
39 responses being sent by the server could be lost. This resulted in
40 dropped connections and sometimes bounces generated by a peer sending
43 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
44 string. Previously it was possible to cause undefined behaviour in a
45 library routine (usually a crash). Found by "zerons".
47 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
50 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
51 API was removed, so update to use the newer ones.
54 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
55 to changes apparently associated with TLS1.3 handling some of the APIs
56 previously used were either nonfunctional or inappropriate. Strings
57 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
58 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
59 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
60 This affects log line X= elements, the $tls_{in,out}_cipher variables,
61 and the use of specific cipher names in the encrypted= ACL condition.
67 JH/01 Remove code calling the customisable local_scan function, unless a new
68 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
70 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
71 non-signal-safe functions being used.
73 JH/03 Bug 2269: When presented with a received message having a stupidly large
74 number of DKIM-Signature headers, disable DKIM verification to avoid
75 a resource-consumption attack. The limit is set at twenty.
77 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
78 report of oldest_pass in ${authres } in consequence, and separate out
79 some descriptions of reasons for verification fail.
81 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
82 files in the spool were present and unlocked. A queue-runner could spot
83 them, resulting in a duplicate delivery. Fix that by doing the unlock
84 after the unlink. Investigation by Tim Stewart. Take the opportunity to
85 add more error-checking on spoolfile handling while that code is being
88 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
89 No known attacks, no CVE, this is defensive hardening.
91 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
92 a queue-runner could start a delivery while other operations were ongoing.
93 Cutthrough delivery was a common victim, resulting in duplicate delivery.
94 Found and investigated by Tim Stewart. Fix by using the open message data
95 file handle rather than opening another, and not locally closing it (which
96 releases a lock) for that case, while creating the temporary .eml format
97 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
99 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
100 $sender_verify_failure/$recipient_verify_failure to "random".
102 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
105 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
106 Previously this would segfault.
108 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
111 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
112 like zero, since the resolver should be doing this for us, But we need one
113 as a CNAME but no MX presence gets the CNAME returned; we need to check
114 that doesn't point to an MX to declare it "no MX returned" rather than
115 "error, loop". A new main option is added so the older capability of
116 following some limited number of chain links is maintained.
118 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
120 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
121 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
122 now-deprecated earlier definitions used only specified the range up to TLS
123 1.2 (in the older-version library docs).
125 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
127 JH/15 Rework TLS client-side context management. Stop using a global, and
128 explicitly pass a context around. This enables future use of TLS for
129 connections to service-daemons (eg. malware scanning) while a client smtp
130 connection is using TLS; with cutthrough connections this is quite likely.
132 JH/16 Fix ARC verification to do AS checks in reverse order.
134 JH/17 Support a "tls" option on the ${readsocket } expansion item.
136 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
137 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
138 Previously the "utf8" would be re-prepended for every additional message.
140 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
141 Previously thery were accepted, resulting in issues when attempting to
142 forward messages to a non-supporting MTA.
144 PP/02 Let -n work with printing macros too, not just options.
146 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
147 one parent address was copied, and bogus data was used at delivery-logging
148 time. Either a crash (after delivery) or bogus log data could result.
149 Discovery and analysis by Tim Stewart.
151 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
152 Previously if the string ended mid-character, we did not insert the
153 promised '?' replacement.
155 PP/04 Documentation: current string operators work on bytes, not codepoints.
157 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
158 should pack well giving a smaller memory footprint so better caching and
159 therefore performance. Group the declarations where this can't be done so
160 that the byte-sized flag variables are not interspersed among pointer
161 variables, giving a better chance of good packing by the compiler.
163 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
164 non-null, to avoid issues with sites running BATV. Previously reports were
165 sent with an empty envelope sender so looked like bounces.
167 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
168 The ignore_error flag wasn't being returned from the filter subprocess so
169 was not set for later routers. Investigation and fix by Matthias Kurz.
171 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
172 and a msg:complete for the whole, when a message is manually removed using
173 -Mrm. Developement by Matthias Kurz, hacked on by JH.
175 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
176 a "Gnu special" function, asprintf() in the DB utility binary builds; I
177 hope that is portable enough.
179 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
180 requiring a known-CA anchor certificate; make it now rely entirely on the
181 TLSA as an anchor. Checking the name on the leaf cert against the name
182 on the A-record for the host is still done for TA (but not for EE mode).
184 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
185 included in delivery lines for non-proxied connections, when compiled with
186 SUPPORT_SOCKS and running with proxy logging enabled.
188 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
189 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
190 move the existing event to fire before the normal logging of message
191 failure so that custom logging is bracketed by normal logging.
193 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
194 msg:fail:internal event. Developement by Matthias Kurz.
196 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
197 far too small for todays use of crypto signatures stored there. Go all
198 the way to the max DNS message size of 64kB, even though this might be
199 overmuch for IOT constrained device use.
201 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
202 copy a string over itself. The library routine is documented as not
203 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
205 JH/32 For main options check_spool_space and check_inode_space, where the
206 platform supports 64b integers, support more than the previous 2^31 kB
207 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
208 the previous G, M, k.
210 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
211 $authenticated_fail_id variable on authentication failure. Previously
214 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
215 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
216 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
217 GNUTLS_SEC_PARAM_MEDIUM.
219 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
220 side. Previously we would continue as if no SNI had been received.
222 JH/36 Harden the handling of string-lists. When a list consisted of a sole
223 "<" character, which should be a list-separator specification, we walked
224 off past the nul-terimation.
226 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
227 causes) even when the retry time is not yet met. Previously they were
228 not, meaning that when (say) an account was over-quota and temp-rejecting,
229 and multiple senders' messages were queued, only one sender would get
230 notified on each configured delay_warning cycle.
232 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
234 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
235 cipher-suites, an error can be left on the stack even for a succeeding
236 accept; this results in impossible error messages when a later operation
239 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
240 return error codes indicating retry. Under TLS1.3 this becomes required.
242 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
243 it only wrote the new authenticators, resulting in a lack of tracking of
244 peer changes of ESMTP extensions until the next cache flush.
246 JH/41 Fix the loop reading a message header line to check for integer overflow,
247 and more-often against header_maxsize. Previously a crafted message could
248 induce a crash of the recive process; now the message is cleanly rejected.
250 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
251 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
257 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
258 When redis_servers is set to a list of > 1 element, and the Redis servers
259 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
260 case of MOVED into a DEFER case instead, thus moving the query onto the
261 next server in the list. For a cluster of N elements, all N servers must
262 be defined in redis_servers.
264 GF/02 Catch and remove uninitialized value warning in exiqsumm
265 Check for existence of @ARGV before looking at $ARGV[0]
267 JH/01 Replace the store_release() internal interface with store_newblock(),
268 which internalises the check required to safely use the old one, plus
269 the allocate and data copy operations duplicated in both (!) of the
270 extant use locations.
272 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
273 modifier. This matches the restriction on the commandline.
275 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
276 Previously only the last row was returned.
278 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
279 we assumed that tags in the header were well-formed, and parsed the
280 element content after inspecting only the first char of the tag.
281 Assumptions at that stage could crash the receive process on malformed
284 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
285 While running the DKIM ACL we operate on the Permanent memory pool so that
286 variables created with "set" persist to the DATA ACL. Also (at any time)
287 DNS lookups that fail create cache records using the Permanent pool. But
288 expansions release any allocations made on the current pool - so a dnsdb
289 lookup expansion done in the DKIM ACL releases the memory used for the
290 DNS negative-cache, and bad things result. Solution is to switch to the
291 Main pool for expansions.
292 While we're in that code, add checks on the DNS cache during store_reset,
293 active in the testsuite.
294 Problem spotted, and debugging aided, by Wolfgang Breyha.
296 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
297 When none of the hosts presented to a transport match an already-open
298 connection, close it and proceed with the list. Previously we would
299 queue the message. Spotted by Lena with Yahoo, probably involving
302 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
303 Previously a spurious "250 OK id=" response was appended to the proper
306 JH/08 The "support for" informational output now, which built with Content
307 Scanning support, has a line for the malware scanner interfaces compiled
308 in. Interface can be individually included or not at build time.
310 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
311 by the template makefile "src/EDITME". The "STREAM" support for an older
312 ClamAV interface method is removed.
314 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
315 rows affected is given instead).
317 JH/11 The runtime Berkeley DB library version is now additionally output by
318 "exim -d -bV". Previously only the compile-time version was shown.
320 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
321 SMTP connection. Previously, when one had more receipients than the
322 first, an abortive onward connection was made. Move to full support for
323 multiple onward connections in sequence, handling cutthrough connection
324 for all multi-message initiating connections.
326 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
327 routers. Previously, a multi-recipient message would fail to match the
328 onward-connection opened for the first recipient, and cause its closure.
330 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
331 a timeout on read on a GnuTLS initiating connection, resulting in the
332 initiating connection being dropped. This mattered most when the callout
333 was marked defer_ok. Fix to keep the two timeout-detection methods
336 JH/15 Relax results from ACL control request to enable cutthrough, in
337 unsupported situations, from error to silently (except under debug)
338 ignoring. This covers use with PRDR, frozen messages, queue-only and
341 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
343 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
344 metadata, resulting in a crash in free().
346 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
347 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
348 Broken also in d185889f4, with init system revamp.
350 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
351 Previously we abruptly closed the connection after reading a malware-
352 found indication; now we go on to read the "scan ok" response line,
355 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
356 ACL. Previously, a crash would result.
358 JH/19 Speed up macro lookups during configuration file read, by skipping non-
359 macro text after a replacement (previously it was only once per line) and
360 by skipping builtin macros when searching for an uppercase lead character.
362 JH/20 DANE support moved from Experimental to mainline. The Makefile control
363 for the build is renamed.
365 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
366 was allocated for every new TLS startup, meaning one per message. Fix
367 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
369 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
370 reported the original. Fix to report (as far as possible) the ACL
371 result replacing the original.
373 JH/23 Fix memory leak during multi-message connections using STARTTLS under
374 OpenSSL. Certificate information is loaded for every new TLS startup,
375 and the resources needed to be freed.
377 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
379 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
382 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
383 DATA response info to the (existing) per-recipient response info for
384 the "C=" log element. It can have useful tracking info from the
385 destination system. Patch from Simon Arlott.
387 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
388 length value. Previously this would segfault.
390 HS/02 Support Avast multiline protoocol, this allows passing flags to
391 newer versions of the scanner.
393 JH/28 Ensure that variables possibly set during message acceptance are marked
394 dead before release of memory in the daemon loop. This stops complaints
395 about them when the debug_store option is enabled. Discovered specifically
396 for sender_rate_period, but applies to a whole set of variables.
397 Do the same for the queue-runner and queue-list loops, for variables set
398 from spool message files. Do the same for the SMTP per-message loop, for
399 certain variables indirectly set in ACL operations.
401 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
402 as a multi-recipient message from a mailinglist manager). The coding had
403 an arbitrary cutoff number of characters while checking for more input;
404 enforced by writing a NUL into the buffer. This corrupted long / fast
405 input. The problem was exposed more widely when more pipelineing of SMTP
406 responses was introduced, and one Exim system was feeding another.
407 The symptom is log complaints of SMTP syntax error (NUL chars) on the
408 receiving system, and refused recipients seen by the sending system
409 (propating to people being dropped from mailing lists).
410 Discovered and pinpointed by David Carter.
412 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
413 replaced by the ${authresults } expansion.
415 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
417 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
418 allows proper process termination in container environments.
420 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
421 Previously the "final dot" had a newline after it; ensure it is CR,LF.
423 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
424 and "err_perm", deprecated since 4.83 when the RFC-defined words
425 "temperror" and "permerror" were introduced.
427 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
428 transport-filters or DKIM-signing. The restriction was lost in the
429 consolidation of verify-callout and delivery SMTP handling.
430 Extend the restriction to also cover ARC-signing.
432 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
433 in defer=pass mode supply a 450 to the initiator. Previously the message
436 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
437 tls_require_ciphers is used as before.
439 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
440 "pass_unscanned". Only tmpfails from the scanner are written to
441 the paniclog, as they may require admin intervention (permission
442 denied, license issues). Other scanner errors (like decompression
443 bombs) do not cause a paniclog entry.
445 JH/36 Fix reinitialisation of DKIM logging variable between messages.
446 Previously it was possible to log spurious information in receive log
449 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
450 triggered odd behaviour from Outlook Express clients.
452 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
455 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
456 since the IETF WG has not yet settled on that versus the original
457 "bare" representation.
459 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
460 Previously the millisecond value corrupted the output.
461 Fix also for syslog_pid=no and log_selector +pid, for which the pid
462 corrupted the output.
468 JH/01 Rework error string handling in TLS interface so that the caller in
469 more cases is responsible for logging. This permits library-sourced
470 string to be attached to addresses during delivery, and collapses
471 pairs of long lines into single ones.
473 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
474 during configuration. Wildcards are allowed and expanded.
476 JH/02 Rework error string handling in DKIM to pass more info back to callers.
477 This permits better logging.
479 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
480 do not close it down and have the child transport start it up again on
481 the passed-on TCP connection. Instead, proxy the child (and any
482 subsequent ones) for TLS via a unix-domain socket channel. Logging is
483 affected: the continued delivery log lines do not have any DNSSEC, TLS
484 Certificate or OCSP information. TLS cipher information is still logged.
486 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
487 identical IP addresses on different listening ports. Will also affect
490 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
491 add noisy ifdef guards to special-case this sillyness.
492 Patch from Bernd Kuhls.
494 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
495 than 255 are no longer allowed.
497 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
498 Disable the session-cache too, which might reduce our load. Since we
499 currrectly use a new context for every connection, both as server and
500 client, there is no benefit for these.
501 GnuTLS appears to not support tickets server-side by default (we don't
502 call gnutls_session_ticket_enable_server()) but client side is enabled
503 by default on recent versions (3.1.3 +) unless the PFS priority string
506 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
507 <https://reproducible-builds.org/specs/source-date-epoch/>.
509 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
510 the check for any unsuccessful recipients did not notice the limit, and
511 erroneously found still-pending ones.
513 JH/08 Pipeline CHUNKING command and data together, on kernels that support
514 MSG_MORE. Only in-clear (not on TLS connections).
516 JH/09 Avoid using a temporary file during transport using dkim. Unless a
517 transport-filter is involved we can buffer the headers in memory for
518 creating the signature, and read the spool data file once for the
519 signature and again for transmission.
521 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
522 4.77 as the kernel support then wasn't solid, having issues in 64bit
523 mode. Now, it's been long enough. Add support for FreeBSD also.
525 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
526 case where the routing stage had gathered several addresses to send to
527 a host before calling the transport for the first, we previously failed
528 to close down TLS in the old transport process before passing the TCP
529 connection to the new process. The new one sent a STARTTLS command
530 which naturally failed, giving a failed delivery and bloating the retry
531 database. Investigation and fix prototype from Wolfgang Breyha.
533 JH/12 Fix check on SMTP command input synchronisation. Previously there were
534 false-negatives in the check that the sender had not preempted a response
535 or prompt from Exim (running as a server), due to that code's lack of
536 awareness of the SMTP input buffering.
538 PP/04 Add commandline_checks_require_admin option.
539 Exim drops privileges sanely, various checks such as -be aren't a
540 security problem, as long as you trust local users with access to their
541 own account. When invoked by services which pass untrusted data to
542 Exim, this might be an issue. Set this option in main configuration
543 AND make fixes to the calling application, such as using `--` to stop
546 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
547 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
548 responses to those, into a single TLS record each way (this usually means
549 a single packet). As a side issue, smtp_enforce_sync now works on TLS
552 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
553 affects you only if you're dancing at the edge of the param size limits.
554 If you are, and this message makes sense to you, then: raise the
555 configured limit or use OpenSSL 1.1. Nothing we can do for older
558 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
559 cmdline element to get the documented default one. Previously it was
562 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
563 are unsuable for non-message-specific reasons - eg. connection timeout,
564 banner-time rejection.
566 JH/16 Fix logging of delivery remote port, when specified by router, under
569 PP/06 Repair manualroute's ability to take options in any order, even if one
570 is the name of a transport.
573 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
575 JH/17 Change the list-building routines interface to use the expanding-string
576 triplet model, for better allocation and copying behaviour.
578 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
579 Previously it was constructed the first time a possibly-matching string
580 was met in the configuration file input during startup; now it is done
583 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
584 compatible one, to avoid the (poorly documented) possibility of a config
585 file in the working directory redirecting the DB files, possibly correpting
586 some existing file. CVE-2017-10140 assigned for BDB.
588 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
589 cache-hot. Previously, although the result was properly cached, the
590 initial verify call returned a defer.
592 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
593 the main verify for receipient in uncached-mode.
595 JH/22 Retire historical build files to an "unsupported" subdir. These are
596 defined as "ones for which we have no current evidence of testing".
598 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
599 if present. Previously it was ignored.
601 JH/24 Start using specified-initialisers in C structure init coding. This is
602 a C99 feature (it's 2017, so now considered safe).
604 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
605 if was a fixed-sized field and bitmask ops via macros; it is now more
608 PP/07 GitHub PR 56: Apply MariaDB build fix.
609 Patch provided by Jaroslav Škarvada.
611 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
612 during Coverity cleanups [4.87 JH/47]
613 Diagnosis and fix provided by Michael Fischer v. Mollard.
615 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
616 the right size to place the terminating semicolon on its own folded
617 line, the header hash was calculated to an incorrect value thanks to
618 the (relaxed) space the fold became.
620 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
621 and confused the parent.
623 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
624 which could crash as a result. This could lead to undeliverable messages.
626 JH/28 Logging: "next input sent too soon" now shows where input was truncated
629 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
630 matters on fast-turnover and PID-randomising systems, which were getting
631 out-of-order delivery.
633 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
634 a possibly-overlapping copy. The symptom was that "Remote host closed
635 connection in response to HELO" was logged instead of the actual 4xx
638 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
639 Previously only that bufferd was discarded, resulting in SYMTP command
642 JH/32 DKIM: when a message has multiple signatures matching an identity given
643 in dkim_verify_signers, run the dkim acl once for each. Previously only
644 one run was done. Bug 2189.
646 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
647 "panic the current process" to "deliberately defer". The panic log is
648 still written with the problem list name; the mail and reject logs now
649 get a temp-reject line for the message that was being handled, saying
650 something like "domains check lookup or other defer". The SMTP 451
651 message is still "Temporary local problem".
653 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
654 A crafted sequence of BDAT commands could result in in-use memory beeing
655 freed. CVE-2017-16943.
657 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
658 from SMTP input. Previously it was always done; now only done for DATA
659 and not BDAT commands. CVE-2017-16944.
661 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
662 to the message (such as an overlong header line). Previously this was
663 not done and we did not exit BDAT mode. Followon from the previous item
664 though a different problem.
670 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
671 than -2003 did; needs libidn2 in addition to libidn.
673 JH/02 The path option on a pipe transport is now expanded before use.
675 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
676 Patch provided by "Björn", documentation fix added too.
678 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
679 missing a wire-to-host endian conversion.
681 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
682 close after a BDAT command line could be taken as a following command,
683 giving a synch failure. Fix by only checking for synch immediately
684 before acknowledging the chunk.
686 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
687 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
688 macro. Patches provided by Josh Soref.
690 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
691 Previously we did not; the RFC seems ambiguous and VRFY is not listed
692 by IANA as a service extension. However, John Klensin suggests that we
695 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
696 the dkim code may be unix-mode line endings rather than smtp wire-format
697 CRLF, so prepend a CR to any bare LF.
699 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
700 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
702 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
703 the first were themselves being wrongly included in the feed into dkim
704 processing; with most chunk sizes in use this resulted in an incorrect
705 body hash calculated value.
707 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
708 DKIM signature block, for verification. Although advised against by
709 standards it is specifically not ruled illegal.
711 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
713 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
714 missing a body hash (the bh= tag).
716 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
717 It seems that HAProxy sends the Proxy Protocol information in clear and
718 only then does a TLS startup, so do the same.
720 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
721 TCP connections (such as for Spamd) unless the daemon successfully set
722 Fast Open mode on its listening sockets. This fixes breakage seen on
723 too-old kernels or those not configured for Fast Open, at the cost of
724 requiring both directions being enabled for TFO, and TFO never being used
725 by non-daemon-related Exim processes.
727 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
728 endings, at least on the first header line. Try to canonify any that get
729 past that check, despite the cost.
731 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
732 now limited to an arbitrary five deep, while parsing addresses with the
733 strip_excess_angle_brackets option enabled.
735 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
736 instead leave the unprompted TLS handshake in socket buffer for the
737 TLS library to consume.
739 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
741 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
743 JH/16 Drop variables when they go out of scope. Memory management drops a whole
744 region in one operation, for speed, and this leaves assigned pointers
745 dangling. Add checks run only under the testsuite which checks all
746 variables at a store-reset and panics on a dangling pointer; add code
747 explicitly nulling out all the variables discovered. Fixes one known
748 bug: a transport crash, where a dangling pointer for $sending_ip_address
749 originally assigned in a verify callout, is re-used.
751 PP/06 Drop '.' from @INC in various Perl scripts.
753 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
755 PP/08 Reduce a number of compilation warnings under clang; building with
756 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
757 should be warning-free.
759 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
761 HS/01 Fix portability problems introduced by PP/08 for platforms where
762 realloc(NULL) is not equivalent to malloc() [SunOS et al].
764 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
765 chunk. This allows us to accept broken chunked messages. We need a more
766 general solution here.
768 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
769 already-broken messages in the queue.
771 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
773 JH/19 Fix reference counting bug in routing-generated-address tracking.
779 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
780 supports it and a size is available (ie. the sending peer gave us one).
782 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
783 years of being deprecated). The replacements are the ACLs
784 acl_smtp_mime and acl_not_smtp_mime.
786 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
787 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
788 or even an in-clear connection were permitted. Now, if the host lookup
789 was dnssec and dane was requested then the host is only used if the
790 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
791 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
792 if one fails this test.
793 This means that a poorly-configured remote DNS will make it incommunicado;
794 but it protects against a DNS-interception attack on it.
796 JH/04 Bug 1810: make continued-use of an open smtp transport connection
797 non-noisy when a race steals the message being considered.
799 JH/05 If main configuration option tls_certificate is unset, generate a
800 self-signed certificate for inbound TLS connections.
802 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
803 in rewrites and routers.
805 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
806 and logged a warning sing 4.83; now they are a configuration file error.
808 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
809 (lacking @domain). Apply the same qualification processing as RCPT.
811 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
813 JH/10 Support ${sha256:} applied to a string (as well as the previous
816 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
817 a cutthrough deliver is pending, as we always want to make a connection.
818 This also avoids re-routing the message when later placing the cutthrough
819 connection after a verify cache hit.
820 Do not update it with the verify result either.
822 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
823 when routing results in more than one destination address.
825 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
826 signing (which inhibits the cutthrough capability). Previously only
827 the presence of an option was tested; now an expansion evaluating as
828 empty is permissible (obviously it should depend only on data available
829 when the cutthrough connection is made).
831 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
832 the relevant preceding SMTP command did not note the pipelining mode.
834 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
835 Previously they were not counted.
837 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
838 as one having no matching records. Previously we deferred the message
839 that needed the lookup.
841 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
842 distinguished as "(=".
844 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
845 for missing MX records. Previously it only worked for missing A records.
847 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
849 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
850 after the data-go-ahead and data-ack. Patch from Jason Betts.
852 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
853 even for a "none" policy. Patch from Tony Meyer.
855 JH/22 Fix continued use of a connection for further deliveries. If a port was
856 specified by a router, it must also match for the delivery to be
859 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
860 When one of the recipients of a message was unsuitable for the connection
861 (has no matching addresses), we lost track of needing to mark it
862 deferred. As a result mail would be lost.
864 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
866 JH/25 Decoding ACL controls is now done using a binary search; the source code
867 takes up less space and should be simpler to maintain. Merge the ACL
868 condition decode tables also, with similar effect.
870 JH/26 Fix problem with one_time used on a redirect router which returned the
871 parent address unchanged. A retry would see the parent address marked as
872 delivered, so not attempt the (identical) child. As a result mail would
875 JH/27 Fix a possible security hole, wherein a process operating with the Exim
876 UID can gain a root shell. Credit to http://www.halfdog.net/ for
877 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
880 JH/28 Enable {spool,log} filesystem space and inode checks as default.
881 Main config options check_{log,spool}_{inodes,space} are now
882 100 inodes, 10MB unless set otherwise in the configuration.
884 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
885 Previously it only applied to the main-section connection policy
888 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
890 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
891 by me. Added RFC7919 DH primes as an alternative.
893 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
894 are not in the system include path.
896 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
897 GnuTLS, when a session startup failed (eg because the client disconnected)
898 Exim did stdio operations after fclose. This was exposed by a recent
899 change which nulled out the file handle after the fclose.
901 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
902 signed directly by the cert-signing cert, rather than an intermediate
903 OCSP-signing cert. This is the model used by LetsEncrypt.
905 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
907 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
908 an incoming connection.
910 HS/02 Bug 1802: Do not half-close the connection after sending a request
913 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
914 fallback to "prime256v1".
916 JH/34 SECURITY: Use proper copy of DATA command in error message.
917 Could leak key material. Remotely exploitable. CVE-2016-9963.
923 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
924 and 3.4.4 - once the server is enabled to respond to an OCSP request
925 it does even when not requested, resulting in a stapling non-aware
926 client dropping the TLS connection.
928 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
929 support variable-length bit vectors. No functional change.
931 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
932 The I= interface field on outgoing lines is now after the H= remote
933 host field, same as incoming lines. There is a separate
934 outgoing_interface log selector which allows you to disable the
937 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
938 If not running log_selector +smtp_connection the mainlog would be held
939 open indefinitely after a "too many connections" event, including to a
940 deleted file after a log rotate. Leave the per net connection logging
941 leaving it open for efficiency as that will be quickly detected by the
942 check on the next write.
944 HS/01 Bug 1671: Fix post transport crash.
945 Processing the wait-<transport> messages could crash the delivery
946 process if the message IDs didn't exist for some reason. When
947 using 'split_spool_directory=yes' the construction of the spool
948 file name failed already, exposing the same netto behaviour.
950 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
951 mime_regex ACL conditions.
953 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
954 to DSN fail messages (bounces): remote IP, remote greeting, remote response
955 to HELO, local diagnostic string.
957 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
958 log line to debug. Even when configured with a tls authenticator many
959 client connections are expected to not authenticate in this way, so
960 an authenticate fail is not an error.
962 HS/02 Add the Exim version string to the process info. This way exiwhat
963 gives some more detail about the running daemon.
965 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
966 matter for fast-change records such as DNSBLs.
968 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
969 retry record, even if constant. There may be multiple transports with
970 different interface settings and the retry behaviour needs to be kept
973 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
975 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
977 JH/10 Bug 840: fix log_defer_output option of pipe transport
979 JH/11 Bug 830: use same host for all RCPTS of a message, even under
980 hosts_randomize. This matters a lot when combined with mua_wrapper.
982 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
983 ${quote_pgsql:<string>} operator.
985 JH/13 Bug 1708: avoid misaligned access in cached lookup.
987 JH/14 Change header file name for freeradius-client. Relevant if compiling
988 with Radius support; from the Gentoo tree and checked under Fedora.
990 JH/15 Bug 1712: Introduce $prdr_requested flag variable
992 JH/16 Bug 1714: Permit an empty string as expansion result for transport
993 option transport_filter, meaning no filtering.
995 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
997 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
998 defaults to "*" (all hosts). The variable is now available when not built
999 with TLS, default unset, mainly to enable keeping the testsuite sane.
1000 If a server certificate is not supplied (via tls_certificate) an error is
1001 logged, and clients will find TLS connections fail on startup. Presumably
1002 they will retry in-clear.
1003 Packagers of Exim are strongly encouraged to create a server certificate
1004 at installation time.
1006 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1007 with the $config_file variable.
1009 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1010 in transport context, after the attempt, and per-recipient. The latter type
1011 is per host attempted. The event data is the error message, and the errno
1012 information encodes the lookup type (A vs. MX) used for the (first) host,
1013 and the trailing two digits of the smtp 4xx response.
1015 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1016 to write to mainlog (or rejectlog, paniclog) in the window between file
1017 creation and permissions/ownership being changed. Particularly affects
1018 installations where exicyclog is run as root, rather than exim user;
1019 result is that the running daemon panics and dies.
1021 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1023 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1024 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1025 "pri" and "weight". Note that the previous implicit priority given by the
1026 list order is no longer honoured.
1028 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1029 for DKIM processing.
1031 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1032 by defining SUPPORT_SOCKS.
1034 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1035 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1036 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1037 variables are renamed to proxy_{local,external}_{address,port}.
1039 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1040 for a build by defining SUPPORT_I18N
1042 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1043 of the query string, and make ${quote_redis:} do that quoting.
1045 JH/29 Move Events support from Experimental to mainline, enabled by default
1046 and removable for a build by defining DISABLE_EVENT.
1048 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1050 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1051 cached by the daemon.
1053 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1054 by defining LOOKUP_REDIS. The libhiredis library is required.
1056 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1057 keys are given for lookup.
1059 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1060 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1061 only supported when built with TLS support. The PolarSSL SHA routines
1062 are still used when the TLS library is too old for convenient support.
1064 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1065 openssl_options), for security. OpenSSL forces this from version 1.1.0
1066 server-side so match that on older versions.
1068 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1069 allocation for $value could be released as the expansion processing
1070 concluded, but leaving the global pointer active for it.
1072 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1073 and to use the domains and local_parts ACL conditions.
1075 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1076 incorrectly not doubled on cutthrough transmission, hence seen as a
1077 body-termination at the receiving system - resulting in truncated mails.
1078 Commonly the sender saw a TCP-level error, and retransmitted the message
1079 via the normal store-and-forward channel. This could result in duplicates
1080 received - but deduplicating mailstores were liable to retain only the
1081 initial truncated version.
1083 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1085 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1087 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1088 we're in there, support oversigning also; bug 1309.
1090 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1092 HS/04 Add support for keep_environment and add_environment options.
1094 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1095 either intentional arithmetic overflow during PRNG, or testing config-
1098 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1099 delivery resulted in actual delivery. Cancel cutthrough before DATA
1102 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1103 rejects a recipient: pass the reject to the originator.
1105 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1106 Many were false-positives and ignorable, but it's worth fixing the
1109 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1110 for the new environment-manipulation done at startup. Move the routines
1111 from being local to tls.c to being global via the os.c file.
1113 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1114 an extract embedded as result-arg for a map, the first arg for extract
1115 is unavailable so we cannot tell if this is a numbered or keyed
1116 extraction. Accept either.
1122 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1125 JH/02 The smtp transport option "multi_domain" is now expanded.
1127 JH/03 The smtp transport now requests PRDR by default, if the server offers
1130 JH/04 Certificate name checking on server certificates, when exim is a client,
1131 is now done by default. The transport option tls_verify_cert_hostnames
1132 can be used to disable this per-host. The build option
1133 EXPERIMENTAL_CERTNAMES is withdrawn.
1135 JH/05 The value of the tls_verify_certificates smtp transport and main options
1136 default to the word "system" to access the system default CA bundle.
1137 For GnuTLS, only version 3.0.20 or later.
1139 JH/06 Verification of the server certificate for a TLS connection is now tried
1140 (but not required) by default. The verification status is now logged by
1141 default, for both outbound TLS and client-certificate supplying inbound
1144 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1147 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1148 Status Notification (bounce) messages are now MIME format per RFC 3464.
1149 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1150 under the control of the dsn_advertise_hosts option, and routers may
1151 have a dsn_lasthop option.
1153 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1154 default, modifiable by a malware= option. The list separator for
1155 the options can now be changed in the usual way. Bug 68.
1157 JH/10 The smtp_receive_timeout main option is now expanded before use.
1159 JH/11 The incoming_interface log option now also enables logging of the
1160 local interface on delivery outgoing connections.
1162 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1163 if the interface and destination host and port all match.
1165 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1168 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1169 Patch from Andrew Lewis.
1171 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1172 now supports optional time-restrictions, weighting, and priority
1173 modifiers per server. Patch originally by <rommer@active.by>.
1175 JH/16 The spamd_address main option now supports a mixed list of local
1176 and remote servers. Remote servers can be IPv6 addresses, and
1177 specify a port-range.
1179 JH/17 Bug 68: The spamd_address main option now supports an optional
1180 timeout value per server.
1182 JH/18 Bug 1581: Router and transport options headers_add/remove can
1183 now have the list separator specified.
1185 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1188 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1191 JH/21 Support for the A6 type of dns record is withdrawn.
1193 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1194 rather than the verbs used.
1196 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1197 from 255 to 1024 chars.
1199 JH/24 Verification callouts now attempt to use TLS by default.
1201 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1202 are generic router options now. The defaults didn't change.
1204 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1205 Original patch from Alexander Shikoff, worked over by JH.
1207 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1208 files if ZCAT_COMMAND is not executable.
1210 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1212 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1214 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1215 Normally benign, it bites when the pair was led to by a CNAME;
1216 modern usage is to not canonicalize the domain to a CNAME target
1217 (and we were inconsistent anyway for A-only vs AAAA+A).
1219 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1221 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1222 when evaluating $sender_host_dnssec.
1224 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1225 $sender_helo_dnssec variable.
1227 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1229 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1231 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1233 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1234 documented as working, but never had. Support all but $spam_report.
1236 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1237 added for tls authenticator.
1239 HS/03 Add perl_taintmode main config option
1245 TL/01 When running the test suite, the README says that variables such as
1246 no_msglog_check are global and can be placed anywhere in a specific
1247 test's script, however it was observed that placement needed to be near
1248 the beginning for it to behave that way. Changed the runtest perl
1249 script to read through the entire script once to detect and set these
1250 variables, reset to the beginning of the script, and then run through
1251 the script parsing/test process like normal.
1253 TL/02 The BSD's have an arc4random API. One of the functions to induce
1254 adding randomness was arc4random_stir(), but it has been removed in
1255 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1256 function when detected.
1258 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1259 cause callback expansion.
1261 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1262 syntax errors in an expansion can be treated as a string instead of
1263 logging or causing an error, due to the internal use of bool_lax
1264 instead of bool when processing it.
1266 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1267 server certificates when making smtp deliveries.
1269 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1271 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1273 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1275 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1276 Merged patch from Sebastian Wiedenroth.
1278 JH/05 Fix results-pipe from transport process. Several recipients, combined
1279 with certificate use, exposed issues where response data items split
1280 over buffer boundaries were not parsed properly. This eventually
1281 resulted in duplicates being sent. This issue only became common enough
1282 to notice due to the introduction of connection certificate information,
1283 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1285 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1286 size buffer was used, resulting in syntax errors when an expansion
1289 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1290 version 3.3.6 or later.
1292 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1293 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1294 both become "event_action", the variables become $event_name, $event_data
1295 and $event_defer_errno. There is a new variable $verify_mode, usable in
1296 routers, transports and related events. The tls:cert event is now also
1297 raised for inbound connections, if the main configuration event_action
1300 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1301 early OCSP support, but no stapling (appears to be less than 1.0.0).
1303 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1304 server certificate names available under the smtp transport option
1305 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1308 JH/10 Time-related extraction expansions from certificates now use the main
1309 option "timezone" setting for output formatting, and are consistent
1310 between OpenSSL and GnuTLS compilations. Bug 1541.
1312 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1313 encoded parameter in the incoming message. Bug 1558.
1315 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1316 include certificate info, eximon was claiming there were spoolfile
1319 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1321 JH/14 Log delivery-related information more consistently, using the sequence
1322 "H=<name> [<ip>]" wherever possible.
1324 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1325 are problematic for Debian distribution, omit them from the release
1328 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1330 JH/16 Fix string representation of time values on 64bit time_t architectures.
1333 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1334 output list separator was used.
1339 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1340 checkers that were complaining about end of non-void function with no
1343 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1344 This was a regression introduced in 4.83 by another bugfix.
1346 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1348 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1349 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1355 TF/01 Correctly close the server side of TLS when forking for delivery.
1357 When a message was received over SMTP with TLS, Exim failed to clear up
1358 the incoming connection properly after forking off the child process to
1359 deliver the message. In some situations the subsequent outgoing
1360 delivery connection happened to have the same fd number as the incoming
1361 connection previously had. Exim would try to use TLS and fail, logging
1362 a "Bad file descriptor" error.
1364 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1365 utilities have not been installed.
1367 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1368 temporary space as the ACL may create new global variables.
1370 TL/01 LDAP support uses per connection or global context settings, depending
1371 upon the detected version of the libraries at build time.
1373 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1374 to extract and use the src ip:port in logging and expansions as if it
1375 were a direct connection from the outside internet. PPv2 support was
1376 updated based on HAProxy spec change in May 2014.
1378 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1380 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1381 Properly escape header and check for NULL return.
1383 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1386 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1388 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1389 characters in header names, implemented as a verify condition.
1390 Contributed by Michael Fischer v. Mollard.
1392 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1393 results permerror and temperror. Previous values are deprecated but
1394 still accepted. In a future release, err_perm and err_temp will be
1395 completely removed, which will be a backward incompatibility if the
1396 ACL tests for either of these two old results. Patch contributed by
1397 user bes-internal on the mailing list.
1399 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1401 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1402 selectors, in both main and reject logs.
1404 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1407 JH/07 Add malware type "sock" for talking to simple daemon.
1409 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1411 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1412 routers/transports under cutthrough routing.
1414 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1415 numbers. Touch up "bool" conditional to keep the same definition.
1417 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1419 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1421 JH/12 Expand items in router/transport headers_add or headers_remove lists
1422 individually rather than the list as a whole. Bug 1452.
1424 Required for reasonable handling of multiple headers_ options when
1425 they may be empty; requires that headers_remove items with embedded
1426 colons must have them doubled (or the list-separator changed).
1428 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1429 view the policy declared in the DMARC record. Currently, $dmarc_status
1430 is a combined value of both the record presence and the result of the
1433 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1435 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1436 dnslookup router and the smtp transport (applying to the forward
1439 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1440 of ldap servers used for a specific lookup. Patch provided by Heiko
1443 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1444 New variable $lookup_dnssec_authenticated for observability.
1446 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1447 Patch submitted by Lars Timman.
1449 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1451 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1452 Requires trusted mode and valid format message id, aborts otherwise.
1453 Patch contributed by Heiko Schlichting.
1455 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1456 certextract with support for various fields. Bug 1358.
1458 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1459 is requested by default, modifiable by smtp transport option
1462 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1463 operate on certificate variables to give certificate fingerprints
1464 Also new ${sha256:cert_variable}.
1466 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1468 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1469 Christian Aistleitner.
1471 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1473 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1474 file. Patch from Wolfgang Breyha.
1476 JH/25 Expand the coverage of the delivery $host and $host_address to
1477 client authenticators run in verify callout. Bug 1476.
1479 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1480 align with daemon_smtp_ports. Bug 72.
1482 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1483 support and error reporting did not work properly.
1485 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1486 and is readable. Patch from Andrew Colin Kissa.
1488 TL/14 Enhance documentation of ${run expansion and how it parses the
1489 commandline after expansion, particularly in the case when an
1490 unquoted variable expansion results in an empty value.
1492 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1494 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1495 by renaming away from it. Addresses GH issue 15, reported by
1498 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1500 TL/15 SECURITY: prevent double expansion in math comparison functions
1501 (can expand unsanitized data). Not remotely exploitable.
1508 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1510 PP/02 Make -n do something, by making it not do something.
1511 When combined with -bP, the name of an option is not output.
1513 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1516 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1517 $sender_host_name and config options to manage this, and basic check
1520 PP/05 DSCP support for outbound connections and control modifier for inbound.
1522 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1523 (Only plugin which currently uses this is kerberos4, which nobody should
1524 be using, but we should make it available and other future plugins might
1525 conceivably use it, even though it would break NAT; stuff *should* be
1526 using channel bindings instead).
1528 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1529 name; added for Sendmail compatibility; requires admin caller.
1530 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1531 just ignore it); requires trusted caller.
1532 Also parse but ignore: -Ac -Am -X<logfile>
1535 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1537 TL/02 Add +smtp_confirmation as a default logging option.
1539 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1540 Patch by Magnus Holmgren from 2007-02-20.
1542 TL/04 Bugzilla 1281 - Spec typo.
1543 Bugzilla 1283 - Spec typo.
1544 Bugzilla 1290 - Spec grammar fixes.
1546 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1548 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1550 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1551 mailing list by by Dmitry Isaikin.
1553 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1555 JH/02 Support "G" suffix to numbers in ${if comparisons.
1557 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1559 NM/01 Bugzilla 1197 - Spec typo
1560 Bugzilla 1196 - Spec examples corrections
1562 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1564 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1565 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1568 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1569 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1571 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1572 "acl {{name}{arg}...}", and optional args on acl condition
1575 JH/05 Permit multiple router/transport headers_add/remove lines.
1577 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1579 JH/07 Avoid using a waiting database for a single-message-only transport.
1580 Performance patch from Paul Fisher. Bugzilla 1262.
1582 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1585 JH/09 Add $headers_added variable, with content from use of ACL modifier
1586 add_header (but not yet added to the message). Bugzilla 199.
1588 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1589 Pulled from Bugzilla 817 by Wolfgang Breyha.
1591 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1593 (nb: this is the same fix as in Exim 4.80.1)
1595 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1598 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1601 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1603 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1604 advertise SMTP AUTH mechanism to us, instead of a generic
1605 protocol violation error. Also, make Exim more robust to bad
1606 data from the Dovecot auth socket.
1608 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1610 When a queue runner is handling a message, Exim first routes the
1611 recipient addresses, during which it prunes them based on the retry
1612 hints database. After that it attempts to deliver the message to
1613 any remaining recipients. It then updates the hints database using
1616 So if a recipient address works intermittently, it can get repeatedly
1617 deferred at routing time. The retry hints record remains fresh so the
1618 address never reaches the final cutoff time.
1620 This is a fairly common occurrence when a user is bumping up against
1621 their storage quota. Exim had some logic in its local delivery code
1622 to deal with this. However it did not apply to per-recipient defers
1623 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1625 This change adds a proper retry rule check during routing so that the
1626 final cutoff time is checked against the message's age. We only do
1627 this check if there is an address retry record and there is not a
1628 domain retry record; this implies that previous attempts to handle
1629 the address had the retry_use_local_parts option turned on. We use
1630 this as an approximation for the destination being like a local
1631 delivery, as in LMTP.
1633 I suspect this new check makes the old local delivery cutoff check
1634 redundant, but I have not verified this so I left the code in place.
1636 TF/02 Correct gecos expansion when From: is a prefix of the username.
1638 Test 0254 submits a message to Exim with the header
1642 When I ran the test suite under the user fanf2, Exim expanded
1643 the header to contain my full name, whereas it should have added
1644 a Resent-Sender: header. It erroneously treats any prefix of the
1645 username as equal to the username.
1647 This change corrects that bug.
1649 GF/01 DCC debug and logging tidyup
1650 Error conditions log to paniclog rather than rejectlog.
1651 Debug lines prefixed by "DCC: " to remove any ambiguity.
1653 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1655 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1656 Bug spotted by Jeremy Harris; was flawed since initial commit.
1657 Would have resulted in OCSP responses post-SNI triggering an Exim
1658 NULL dereference and crash.
1660 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1662 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1663 Bug detection, analysis and fix by Samuel Thibault.
1664 Bugzilla 1331, Debian bug #698092.
1666 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1668 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1669 Server implementation by Todd Lyons, client by JH.
1670 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1671 config variable "prdr_enable" controls whether the server
1672 advertises the facility. If the client requests PRDR a new
1673 acl_data_smtp_prdr ACL is called once for each recipient, after
1674 the body content is received and before the acl_smtp_data ACL.
1675 The client is controlled by both of: a hosts_try_prdr option
1676 on the smtp transport, and the server advertisement.
1677 Default client logging of deliveries and rejections involving
1678 PRDR are flagged with the string "PRDR".
1680 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1681 fclose(). Diagnosis by Todd Lyons.
1683 PP/17 Update configure.default to handle IPv6 localhost better.
1684 Patch by Alain Williams (plus minor tweaks).
1687 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1688 This is now consistent with GnuTLS, and is now documented: the
1689 previous undocumented portable approach to treating the option as
1690 unset was to force an expansion failure. That still works, and
1691 an empty string is now equivalent.
1693 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1694 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1695 not performing validation itself.
1697 PP/20 Added force_command boolean option to pipe transport.
1698 Patch from Nick Koston, of cPanel Inc.
1700 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1703 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1705 PP/21 Fix eximon continuous updating with timestamped log-files.
1706 Broken in a format-string cleanup in 4.80, missed when I repaired the
1707 other false fix of the same issue.
1708 Report and fix from Heiko Schlichting.
1711 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1712 Report from Prashanth Katuri.
1714 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1715 It's SecureTransport, so affects any MacOS clients which use the
1716 system-integrated TLS libraries, including email clients.
1718 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1719 using a MIME ACL for non-SMTP local injection.
1720 Report and assistance in diagnosis by Warren Baker.
1722 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1724 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1726 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1727 last id that failed so it may be referenced in subsequent ACL's.
1729 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1732 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1733 ldap library initialization, allowing self-signed CA's to be
1734 used. Also properly sets require_cert option later in code by
1735 using NULL (global ldap config) instead of ldap handle (per
1736 session). Bug diagnosis and testing by alxgomz.
1738 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1739 the src/util/ subdirectory.
1741 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1742 renamed to Transport Post Delivery Action by Jeremy Harris, as
1745 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1746 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1747 redis_servers = needs to be configured which will be used by the redis
1748 lookup. Patch from Warren Baker, of The Packet Hub.
1750 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1752 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1753 hostname or reverse DNS when processing a host list. Used suggestions
1754 from multiple comments on this bug.
1756 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1758 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1759 Missed a few lines, added it to make the runtest require no keyboard
1762 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1763 contains upper case chars. Make router use caseful_local_part.
1765 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1766 support when GnuTLS has been built with p11-kit.
1772 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1774 This, or similar/improved, will also be change PP/11 of 4.82.
1780 PP/01 Handle short writes when writing local log-files.
1781 In practice, only affects FreeBSD (8 onwards).
1782 Bugzilla 1053, with thanks to Dmitry Isaikin.
1784 NM/01 Bugzilla 949 - Documentation tweak
1786 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1789 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1791 PP/02 Implemented gsasl authenticator.
1793 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1795 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1796 `pkg-config foo` for cflags/libs.
1798 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1799 with rest of GSASL and with heimdal_gssapi.
1801 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1802 `pkg-config foo` for cflags/libs for the TLS implementation.
1804 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1805 properties get this fed in as external SSF. A number of robustness
1806 and debugging improvements to the cyrus_sasl authenticator.
1808 PP/08 cyrus_sasl server now expands the server_realm option.
1810 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1811 Patch by Jeremy Harris.
1813 PP/10 Added dbmjz lookup type.
1815 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1817 PP/12 MAIL args handles TAB as well as SP, for better interop with
1818 non-compliant senders.
1819 Analysis and variant patch by Todd Lyons.
1821 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1822 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1823 Patch from Dirk Mueller <dmueller@suse.com>
1825 PP/13 tls_peerdn now print-escaped for spool files.
1826 Observed some $tls_peerdn in wild which contained \n, which resulted
1827 in spool file corruption.
1829 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1830 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1831 or write after TLS renegotiation, which otherwise led to messages
1834 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1835 as a tracking header (ie: a signed header comes before the signature).
1836 Patch from Wolfgang Breyha.
1838 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1839 comma-sep list; embedded commas doubled.
1841 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1843 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1845 Report and patch from Dmitry Banschikov.
1847 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1848 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1849 failures. We appear to now support TLS1.1+ with Exim.
1851 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1852 lets Exim select keys and certificates based upon TLS SNI from client.
1853 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1854 before an outbound SMTP session. New log_selector, +tls_sni.
1856 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1857 NULL dereference. Report and patch from Alun Jones.
1859 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1860 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1861 Not seeing resolver debug output on NetBSD, but suspect this is a
1862 resolver implementation change.
1864 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1865 Left warnings. Added "eximon gdb" invocation mode.
1867 PP/21 Defaulting "accept_8bitmime" to true, not false.
1869 PP/22 Added -bw for inetd wait mode support.
1871 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1872 locate the relevant includes and libraries. Made this the default.
1874 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1875 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1877 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1878 This may cause build issues on older platforms.
1880 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1881 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1882 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1883 Added SNI support via GnuTLS too.
1884 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1886 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1888 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1889 Applied second patch from Janne, implementing suggestion to default
1890 multiple-strings-in-record handling to match SPF spec.
1892 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1894 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1895 read-only, out of scope).
1896 Patch from Wolfgang Breyha, report from Stuart Northfield.
1898 PP/29 Fix three issues highlighted by clang analyser static analysis.
1899 Only crash-plausible issue would require the Cambridge-specific
1900 iplookup router and a misconfiguration.
1901 Report from Marcin Mirosław.
1903 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1905 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1906 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1907 As part of this, removing so much warning spew let me fix some minor
1908 real issues in debug logging.
1910 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1911 assignment on my part. Fixed.
1913 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1914 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1915 Janne Snabb (who went above and beyond: thank you).
1917 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1918 string otherwise requires a connection and a bunch more work and it's
1919 relatively easy to get wrong. Should also expose TLS library linkage
1922 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1923 64-bit ${eval} (JH/03).
1925 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1926 GNU libc to support some of the 64-bit stuff, should not lead to
1927 conflicts. Defined before os.h is pulled in, so if a given platform
1928 needs to override this, it can.
1930 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1931 protection layer was required, which is not implemented.
1932 Bugzilla 1254, patch from Wolfgang Breyha.
1934 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1935 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1936 tls_dhparam take prime identifiers. Also unbreak combination of
1937 OpenSSL+DH_params+TLSSNI.
1939 PP/39 Disable SSLv2 by default in OpenSSL support.
1945 PP/01 Solaris build fix for Oracle's LDAP libraries.
1946 Bugzilla 1109, patch from Stephen Usher.
1948 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1950 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1953 TF/02 Fix a couple more cases where we did not log the error message
1954 when unlink() failed. See also change 4.74-TF/03.
1956 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1957 lock up or crash if it happened to be inside a call to libc when it
1958 got a SIGUSR1 from exiwhat.
1960 The SIGUSR1 handler appends the current process status to the process
1961 log which is later printed by exiwhat. It used to use the general
1962 purpose logging code to do this, but several functions it calls are
1963 not safe for signals.
1965 The new output code in the SIGUSR1 handler is specific to the process
1966 log, and simple enough that it's easy to inspect for signal safety.
1967 Removing some special cases also simplifies the general logging code.
1968 Removing the spurious timestamps from the process log simplifies
1971 TF/04 Improved ratelimit ACL condition.
1973 The /noupdate option has been deprecated in favour of /readonly which
1974 has clearer semantics. The /leaky, /strict, and /readonly update modes
1975 are mutually exclusive. The update mode is no longer included in the
1976 database key; it just determines when the database is updated. (This
1977 means that when you upgrade Exim will forget old rate measurements.)
1979 Exim now checks that the per_* options are used with an update mode that
1980 makes sense for the current ACL. For example, when Exim is processing a
1981 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1982 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1983 must specify per_mail/readonly. If you omit the update mode it defaults to
1984 /leaky where that makes sense (as before) or /readonly where required.
1986 The /noupdate option is now undocumented but still supported for
1987 backwards compatibility. It is equivalent to /readonly except that in
1988 ACLs where /readonly is required you may specify /leaky/noupdate or
1989 /strict/noupdate which are treated the same as /readonly.
1991 A useful new feature is the /count= option. This is a generalization
1992 of the per_byte option, so that you can measure the throughput of other
1993 aggregate values. For example, the per_byte option is now equivalent
1994 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1996 The per_rcpt option has been generalized using the /count= mechanism
1997 (though it's more complicated than the per_byte equivalence). When it is
1998 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1999 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2000 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2001 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2002 Note that using per_rcpt with a non-readonly update mode in more than
2003 one ACL will cause the recipients to be double-counted. (The per_mail
2004 and per_byte options don't have this problem.)
2006 The handling of very low rates has changed slightly. If the computed rate
2007 is less than the event's count (usually one) then this event is the first
2008 after a long gap. In this case the rate is set to the same as this event's
2009 count, so that the first message of a spam run is counted properly.
2011 The major new feature is a mechanism for counting the rate of unique
2012 events. The new per_addr option counts the number of different
2013 recipients that someone has sent messages to in the last time period. It
2014 behaves like per_rcpt if all the recipient addresses are different, but
2015 duplicate recipient addresses do not increase the measured rate. Like
2016 the /count= option this is a general mechanism, so the per_addr option
2017 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2018 example, measure the rate that a client uses different sender addresses
2019 with the options per_mail/unique=$sender_address. There are further
2020 details in the main documentation.
2022 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2024 TF/06 Removed a few PCRE remnants.
2026 TF/07 Automatically extract Exim's version number from tags in the git
2027 repository when doing development or release builds.
2029 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2030 Bugzilla 879. Patch from Paul Fisher.
2032 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2033 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2036 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2038 PP/05 Variable $av_failed, true if the AV scanner deferred.
2039 Bugzilla 1078. Patch from John Horne.
2041 PP/06 Stop make process more reliably on build failure.
2042 Bugzilla 1087. Patch from Heiko Schlittermann.
2044 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2045 Bugzilla 1089. Patch from Heiko Schlittermann.
2047 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2048 Bugzilla 1131. Patch from Holger Weiß.
2050 PP/09 Handle IPv6 addresses with SPF.
2051 Bugzilla 860. Patch from Wolfgang Breyha.
2053 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2055 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2058 PP/11 match_* no longer expand right-hand-side by default.
2059 New compile-time build option, EXPAND_LISTMATCH_RHS.
2060 New expansion conditions, "inlist", "inlisti".
2062 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2064 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2066 PP/14 fix log_write() format string regression from TF/03.
2067 Bugzilla 1152. Patch from Dmitry Isaikin.
2073 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2075 PP/02 Harmonised TLS library version reporting; only show if debugging.
2076 Layout now matches that introduced for other libraries in 4.74 PP/03.
2078 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2080 PP/04 New "dns_use_edns0" global option.
2082 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2085 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2086 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2088 TK/01 Updated PolarSSL code to 0.14.2.
2089 Bugzilla 1097. Patch from Andreas Metzler.
2091 PP/07 Catch divide-by-zero in ${eval:...}.
2092 Fixes bugzilla 1102.
2094 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2097 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2098 format-string attack -- SECURITY: remote arbitrary code execution.
2100 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2101 time unintentionally subject to list matching rules, letting the header
2102 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2103 arbitrary string expansion). This allowed for information disclosure.
2105 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2106 INT_MIN/-1 -- value coerced to INT_MAX.
2112 NM/01 Workaround for PCRE version dependency in version reporting
2115 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2116 This fixes portability to compilers other than gcc, notably
2117 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2119 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2120 makefiles for portability to HP-UX and POSIX correctness.
2122 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2123 Also via indented variable definition in the Makefile.
2124 (Debugging by Oliver Heesakkers).
2126 PP/02 Restore caching of spamd results with expanded spamd_address.
2127 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2129 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2130 Improves build reliability. Fix from: Frank Elsner
2132 NM/02 Fix wide character breakage in the rfc2047 coding
2133 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2135 NM/03 Allow underscore in dnslist lookups
2136 Fixes bug 1026. Patch from Graeme Fowler
2138 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2139 Code patches from Adam Ciarcinski of NetBSD.
2141 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2144 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2145 is logged, to avoid truncation. Patch from John Horne.
2147 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2148 Patch from Jakob Hirsch.
2150 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2151 SQL string expansion failure details.
2152 Patch from Andrey Oktyabrski.
2154 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2155 Patch from Simon Arlott.
2157 PP/09 New lookups functionality failed to compile on old gcc which rejects
2158 extern declarations in function scope.
2159 Patch from Oliver Fleischmann
2161 PP/10 Use sig_atomic_t for flags set from signal handlers.
2162 Check getgroups() return and improve debugging.
2163 Fixed developed for diagnosis in bug 927 (which turned out to be
2166 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2167 Patch from Mark Zealey.
2169 PP/12 Bugzilla 1056: Improved spamd server selection.
2170 Patch from Mark Zealey.
2172 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2173 Based on patch from Heiko Schlittermann.
2175 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2176 Patch from Uwe Doering, sign-off by Michael Haardt.
2178 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2179 variable declaration deep within a block. Bug and patch from
2182 PP/15 lookups-Makefile IRIX compatibility coercion.
2184 PP/16 Make DISABLE_DKIM build knob functional.
2186 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2187 Patch by Simon Arlott
2189 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2190 variable argument macros. Our copy now differs from upstream.
2196 TF/01 Failure to get a lock on a hints database can have serious
2197 consequences so log it to the panic log.
2199 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2200 controlled using the smtp_confirmation log selector.
2202 TF/03 Include the error message when we fail to unlink a spool file.
2204 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2205 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2206 for maintaining out-of-tree patches for some time.
2208 PP/01 Bugzilla 139: Documentation and portability issues.
2209 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2210 Handle per-OS dynamic-module compilation flags.
2212 PP/02 Let /dev/null have normal permissions.
2213 The 4.73 fixes were a little too stringent and complained about the
2214 permissions on /dev/null. Exempt it from some checks.
2215 Reported by Andreas M. Kirchwitz.
2217 PP/03 Report version information for many libraries, including
2218 Exim version information for dynamically loaded libraries. Created
2219 version.h, now support a version extension string for distributors
2220 who patch heavily. Dynamic module ABI change.
2222 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2223 privilege escalation vulnerability whereby the Exim run-time user
2224 can cause root to append content of the attacker's choosing to
2227 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2230 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2231 If dropping privileges for untrusted macros, we disabled normal logging
2232 on the basis that it would fail; for the Exim run-time user, this is not
2233 the case, and it resulted in successful deliveries going unlogged.
2234 Fixed. Reported by Andreas Metzler.
2240 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2241 only prepend for the Resent-* case. Fixes regression introduced in
2242 Exim 4.70 by NM/22 for Bugzilla 607.
2244 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2245 increasing numbers of administrators be bitten by this.
2247 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2249 PP/03 Bugzilla 994: added openssl_options main configuration option.
2251 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2253 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2255 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2257 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2258 without a peer certificate, leading to a segfault because of an
2259 assumption that peers always have certificates. Be a little more
2260 paranoid. Problem reported by Martin Tscholak.
2262 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2263 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2264 NB: ClamAV planning to remove STREAM in "middle of 2010".
2265 CL also introduces -bmalware, various -d+acl logging additions and
2266 more caution in buffer sizes.
2268 PP/09 Implemented reverse_ip expansion operator.
2270 PP/10 Bugzilla 937: provide a "debug" ACL control.
2272 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2274 PP/12 Bugzilla 973: Implement --version.
2276 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2278 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2280 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2282 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2283 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2284 ignore trailing whitespace.
2286 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2288 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2291 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2292 Notification from Dr Andrew Aitchison.
2294 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2295 ExtendedDetectionInfo response format.
2296 Notification from John Horne.
2298 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2301 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2302 XSL and documented dependency on system catalogs, with examples of how
2305 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2308 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2309 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2310 configuration file which is writeable by the Exim user or group.
2312 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2313 of configuration files to cover files specified with the -C option if
2314 they are going to be used with root privileges, not just the default
2317 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2318 option (effectively making it always true).
2320 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2321 files to be used while preserving root privileges.
2323 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2324 that rogue child processes cannot use them.
2326 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2327 run-time user, instead of root.
2329 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2330 Exim run-time user without dropping privileges.
2332 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2333 result string, instead of calling string_vformat() twice with the same
2336 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2337 for other users. Others should always drop root privileges if they use
2338 -C on the command line, even for a whitelisted configure file.
2340 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2342 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2348 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2349 $data_path, and $header_path variables; fixed documentation bugs and
2352 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2353 exipick to access non-standard spools, including the "frozen" queue
2356 NM/01 Bugzilla 965: Support mysql stored procedures.
2357 Patch from Alain Williams
2359 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2361 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2362 Patch from Andreas Metzler
2364 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2365 Patch from Kirill Miazine
2367 NM/05 Bugzilla 671: Added umask to procmail example.
2369 JJ/03 installed exipick 20100323.0, fixing doc bug
2371 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2372 directory. Notification and patch from Dan Rosenberg.
2374 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2376 TK/02 Improve log output when DKIM signing operation fails.
2378 MH/01 Treat the transport option dkim_domain as a colon separated
2379 list, not as a single string, and sign the message with each element,
2380 omitting multiple occurences of the same signer.
2382 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2383 Bugzilla 985, 986. Patch by Simon Arlott
2385 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2386 Patch by Simon Arlott
2388 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2389 MBX locking. Notification from Dan Rosenberg.
2395 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2397 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2399 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2401 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2403 NM/04 Bugzilla 915: Flag broken perl installation during build.
2409 TK/01 Added patch by Johannes Berg that expands the main option
2410 "spamd_address" if it starts with a dollar sign.
2412 TK/02 Write list of recipients to X-Envelope-Sender header when building
2413 the mbox-format spool file for content scanning (suggested by Jakob
2416 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2417 (http://www.dcc-servers.net/) support via dccifd. Activated by
2418 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2420 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2421 by Mark Daniel Reidel <mr@df.eu>.
2423 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2424 When building exim an external PCRE library is now needed -
2425 PCRE is a system library on the majority of modern systems.
2426 See entry on PCRE_LIBS in EDITME file.
2428 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2429 conversation. Added nologin parameter to request.
2430 Patch contributed by Kirill Miazine.
2432 TF/01 Do not log submission mode rewrites if they do not change the address.
2434 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2436 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2437 log files in place. Contributed by Roberto Lima.
2439 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2441 TF/03 Bugzilla 615: When checking the local_parts router precondition
2442 after a local_part_suffix or local_part_prefix option, Exim now
2443 does not use the address's named list lookup cache, since this
2444 contains cached lookups for the whole local part.
2446 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2447 Robert Millan. Documentation is in experimental-spec.txt.
2449 TF/04 Bugzilla 668: Fix parallel build (make -j).
2451 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2453 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2454 Patch provided by Jan Srzednicki.
2456 TF/05 Leading white space used to be stripped from $spam_report which
2457 wrecked the formatting. Now it is preserved.
2459 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2460 that they are available at delivery time.
2462 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2464 TF/08 TLS error reporting now respects the incoming_interface and
2465 incoming_port log selectors.
2467 TF/09 Produce a more useful error message if an SMTP transport's hosts
2468 setting expands to an empty string.
2470 NM/06 Bugzilla 744: EXPN did not work under TLS.
2471 Patch provided by Phil Pennock.
2473 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2474 Patch provided by Richard Godbee.
2476 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2477 acl_smtp_notquit, added index entry.
2479 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2480 Patch provided by Eugene Bujak.
2482 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2483 accept(). Patch provided by Maxim Dounin.
2485 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2486 Patch provided by Phil Pennock.
2488 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2490 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2491 Patch provided by Brad "anomie" Jorsch.
2493 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2494 Patch provided by Dean Brooks.
2496 TK/05 Add native DKIM support (does not depend on external libraries).
2498 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2499 Patch provided by Graeme Fowler.
2501 NM/16 Bugzilla 851: Documentation example syntax fix.
2503 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2505 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2508 NM/19 Bugzilla 745: TLS version reporting.
2509 Patch provided by Phil Pennock.
2511 NM/20 Bugzilla 167: bool: condition support.
2512 Patch provided by Phil Pennock.
2514 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2515 clients. Patch provided by Phil Pennock.
2517 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2518 Patch provided by Brad "anomie" Jorsch.
2520 NM/23 Bugzilla 687: Fix misparses in eximstats.
2521 Patch provided by Heiko Schlittermann.
2523 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2524 Patch provided by Heiko Schlittermann.
2526 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2527 plus update to original patch.
2529 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2531 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2532 Patch provided by David Brownlee.
2534 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2536 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2538 NM/30 Bugzilla 888: TLS documentation bugfixes.
2540 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2542 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2543 Unlike the original bugzilla I have changed all shell scripts in src tree.
2545 NM/33 Bugzilla 898: Transport filter timeout fix.
2546 Patch by Todd Rinaldo.
2548 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2549 Patch by Serge Demonchaux.
2551 NM/35 Bugzilla 39: Base64 decode bug fixes.
2552 Patch by Jakob Hirsch.
2554 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2556 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2558 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2560 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2566 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2567 ALT-N's libdkim that I have put here:
2568 http://duncanthrax.net/exim-experimental/
2570 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2571 were called 'true' and it seems that C99 defines that as a reserved
2572 keyword to be used with 'bool' variable types. That means you could
2573 not include C99-style headers which use bools without triggering
2574 build errors in sieve.c.
2576 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2577 as mailq or other aliases. Changed the --help handling significantly
2578 to do whats expected. exim_usage() emits usage/help information.
2580 SC/01 Added the -bylocaldomain option to eximstats.
2582 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2584 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2586 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2592 PH/01 Another patch from the Sieve maintainer.
2594 PH/02 When an IPv6 address is converted to a string for single-key lookup
2595 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2596 dots are used instead of colons so that keys in lsearch files need not
2597 contain colons. This was done some time before quoting was made available
2598 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2599 (notated using the quote facility) so as to distinguish them from IPv4
2600 keys. This meant that lookups for IP addresses in host lists did not work
2601 for iplsearch lookups.
2603 This has been fixed by arranging for IPv6 addresses to be expressed with
2604 colons if the lookup type is iplsearch. This is not incompatible, because
2605 previously such lookups could never work.
2607 The situation is now rather anomalous, since one *can* have colons in
2608 ordinary lsearch keys. However, making the change in all cases is
2609 incompatible and would probably break a number of configurations.
2611 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2614 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2615 conversion specification without a maximum field width, thereby enabling
2616 a rogue spamd server to cause a buffer overflow. While nobody in their
2617 right mind would setup Exim to query an untrusted spamd server, an
2618 attacker that gains access to a server running spamd could potentially
2619 exploit this vulnerability to run arbitrary code as the Exim user.
2621 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2622 $primary_hostname instead of what libspf2 thinks the hosts name is.
2624 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2625 a directory entry by the name of the lookup key. Previously, if a
2626 symlink pointed to a non-existing file or a file in a directory that
2627 Exim lacked permissions to read, a lookup for a key matching that
2628 symlink would fail. Now it is enough that a matching directory entry
2629 exists, symlink or not. (Bugzilla 503.)
2631 PH/03 The body_linecount and body_zerocount variables are now exported in the
2634 PH/04 Added the $dnslist_matched variable.
2636 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2637 This means they are set thereafter only if the connection becomes
2640 PH/06 Added the client_condition to authenticators so that some can be skipped
2641 by clients under certain conditions.
2643 PH/07 The error message for a badly-placed control=no_multiline_responses left
2644 "_responses" off the end of the name.
2646 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2648 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2649 (without spaces) instead of just copying the configuration text.
2651 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2653 PH/11 Added $max_received_linelength.
2655 PH/12 Added +ignore_defer and +include_defer to host lists.
2657 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2658 way in which PCRE > 7.0 is built.
2660 PH/14 Implemented queue_only_load_latch.
2662 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2663 MAIL command. The effect was to mangle the value on 64-bit systems.
2665 PH/16 Another patch from the Sieve maintainer.
2667 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2669 PH/18 If a system quota error occurred while trying to create the file for
2670 a maildir delivery, the message "Mailbox is full" was not appended to the
2671 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2672 only to a quota excession during the actual writing of the file.
2674 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2675 characters?) which causes problems in log lines. The DN values are now
2676 passed through string_printing() before being added to log lines.
2678 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2679 and InterBase are left for another time.)
2681 PH/21 Added message_body_newlines option.
2683 PH/22 Guard against possible overflow in moan_check_errorcopy().
2685 PH/23 POSIX allows open() to be a macro; guard against that.
2687 PH/24 If the recipient of an error message contained an @ in the local part
2688 (suitably quoted, of course), incorrect values were put in $domain and
2689 $local_part during the evaluation of errors_copy.
2695 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2696 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2699 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2700 issue a MAIL command.
2702 PH/02 In an ACL statement such as
2704 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2706 if a client was not listed at all, or was listed with a value other than
2707 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2708 the condition was not true (as it should be), so access was not denied.
2709 The bug was that the ! inversion was incorrectly passed on to the second
2710 item. This has been fixed.
2712 PH/03 Added additional dnslists conditions == and =& which are different from
2713 = and & when the dns lookup returns more than one IP address.
2715 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2716 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2718 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2719 FSYNC, which compiles an option called disable_fsync that allows for
2720 bypassing fsync(). The documentation is heavily laced with warnings.
2722 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2724 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2725 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2726 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2727 including adding "make clean"; (3) Added -fPIC when compiling the test
2728 dynamically loaded module, to get rid of a warning.
2730 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2731 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2732 = 0s. The bug is otherwise harmless.
2734 PH/07 There was a bug in the dovecot authenticator such that the value of
2735 $auth1 could be overwritten, and so not correctly preserved, after a
2736 successful authentication. This usually meant that the value preserved by
2737 the server_setid option was incorrect.
2739 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2741 PH/09 Installed PCRE release 7.0.
2743 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2744 run for batched SMTP input. It is now run at the start of every message
2745 in the batch. While fixing this I discovered that the process information
2746 (output by running exiwhat) was not always getting set for -bs and -bS
2747 input. This is fixed, and it now also says "batched" for BSMTP.
2749 PH/11 Added control=no_pipelining.
2751 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2752 patch, slightly modified), and move the expansion of helo_data till after
2753 the connection is made in the smtp transport (so it can use these
2756 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2758 PH/14 Added log_selector = +pid.
2760 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2762 PH/16 Add ${if forany and ${if forall.
2764 PH/17 Added dsn_from option to vary the From: line in DSNs.
2766 PH/18 Flush SMTP output before performing a callout, unless control =
2767 no_callout_flush is set.
2769 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2770 was true (the default) a successful delivery failed to delete the retry
2771 item, thus causing premature timeout of the address. The bug is now
2774 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2776 PH/21 Long custom messages for fakedefer and fakereject are now split up
2777 into multiline responses in the same way that messages for "deny" and
2778 other ACL rejections are.
2780 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2781 with slight modification.
2783 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2784 draft, changing the syntax and factoring some duplicate code".
2786 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2787 for deliveries of the second and subsequent messages over the same SMTP
2790 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2791 ${reduce, with only minor "tidies".
2793 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2795 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2796 expansion side effects.
2798 PH/27 When a message times out after an over-quota error from an Exim-imposed
2799 quota, the bounce message says "mailbox is full". This message was not
2800 being given when it was a system quota that was exceeded. It now should
2803 MH/03 Made $recipients available in local_scan(). local_scan() already has
2804 better access to the recipient list through recipients_list[], but
2805 $recipients can be useful in postmaster-provided expansion strings.
2807 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2808 in the case of a MAIL command with additional options following the
2809 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2810 were accidentally chopped off.
2812 PH/29 SMTP synchronization checks are implemented when a command is read -
2813 there is a check that no more input is waiting when there shouldn't be
2814 any. However, for some commands, a delay in an ACL can mean that it is
2815 some time before the response is written. In this time, more input might
2816 arrive, invalidly. So now there are extra checks after an ACL has run for
2817 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2818 pipelining has not been advertised.
2820 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2822 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2823 returned in the SMTP response when smtp_return_error_details was false.
2824 This has been fixed.
2826 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2827 instead of the C I/O that was originally supplied, because problems were
2828 reported on Solaris.
2830 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2831 Exim which did not show up earlier: it was assuming that a call to
2832 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2833 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2834 was a macro that became an assignment, so it seemed to work. This has
2835 changed to a proper function call with a void return, hence the compile
2836 error. Exim's code has been fixed.
2838 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2841 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2843 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2845 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2846 because it turns out to be too big or there is a timeout) there is no
2847 "Completed" line in the log. When some messages of this type were
2848 selected by exigrep, they were listed as "not completed". Others were
2849 picked up by some special patterns. I have improved the selection
2850 criteria to be more general.
2852 PH/38 The host_find_failed option in the manualroute router can now be set
2853 to "ignore", to completely ignore a host whose IP address cannot be
2854 found. If all hosts are ignored, the behaviour is controlled by the new
2855 host_all_ignored option.
2857 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2858 homing or because of multiple MX records with /mx) generated more than
2859 one IP address, and the following item turned out to be the local host,
2860 all the secondary addresses of the first item were incorrectly removed
2861 from the list, along with the local host and any following hosts (which
2862 is what is supposed to happen).
2864 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2865 whoever called Exim into the -H file. In the case of the daemon it was
2866 behaving confusingly. When first started, it used values for whoever
2867 started the daemon, but after a SIGHUP it used the Exim user (because it
2868 calls itself on a restart). I have changed the code so that it now always
2871 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2872 message are rejected with the same error (e.g. no authentication or bad
2873 sender address), and a DATA command is nevertheless sent (as can happen
2874 with PIPELINING or a stupid MUA), the error message that was given to the
2875 RCPT commands is included in the rejection of the DATA command. This is
2876 intended to be helpful for MUAs that show only the final error to their
2879 PH/42 Another patch from the Sieve maintainer.
2881 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2882 Eximstats - Fixed some broken HTML links and added missing column headers
2884 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2885 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2887 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2889 PH/43 Yet another patch from the Sieve maintainer.
2891 PH/44 I found a way to check for a TCP/IP connection going away before sending
2892 the response to the final '.' that terminates a message, but only in the
2893 case where the client has not sent further data following the '.'
2894 (unfortunately, this is allowed). However, in many cases there won't be
2895 any further data because there won't be any more messages to send. A call
2896 to select() can be used: if it shows that the input is "ready", there is
2897 either input waiting, or the socket has been closed. An attempt to read
2898 the next input character can distinguish the two cases. Previously, Exim
2899 would have sent an OK response which the client would never have see.
2900 This could lead to message repetition. This fix should cure that, at
2901 least in a lot of common cases.
2903 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2904 advertised in response to EHLO.
2910 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2911 fixed by 4.65/MH/01 (is this a record?) are fixed:
2913 (i) An empty string was always treated as zero by the numeric comparison
2914 operators. This behaviour has been restored.
2916 (ii) It is documented that the numeric comparison operators always treat
2917 their arguments as decimal numbers. This was broken in that numbers
2918 starting with 0 were being interpreted as octal.
2920 While fixing these problems I realized that there was another issue that
2921 hadn't been noticed. Values of message_size_limit (both the global option
2922 and the transport option) were treated as octal if they started with 0.
2923 The documentation was vague. These values are now always treated as
2924 decimal, and I will make that clear in the documentation.
2930 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2931 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2934 MH/01 Don't check that the operands of numeric comparison operators are
2935 integers when their expansion is in "skipping" mode (fixes bug
2936 introduced by 4.64-PH/07).
2938 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2939 child addresses, Exim now panics and dies. Previously, because the count
2940 is held in a short int, deliveries were likely to be lost. As such a
2941 large number of recipients for a single message is ridiculous
2942 (performance will be very, very poor), I have chosen to impose a limit
2943 rather than extend the field.
2949 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2950 leftover -K file (the existence of which was triggered by #402).
2951 While we were at it, introduced process PID as part of the -K
2952 filename. This should rule out race conditions when creating
2955 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2956 processing considerably. Previous code took too long for large mails,
2957 triggering a timeout which in turn triggers #401.
2959 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2960 in the DK code in transports.c. sendfile() is not really portable,
2961 hence the _LINUX specificness.
2963 TF/01 In the add_headers option to the mail command in an Exim filter,
2964 there was a bug that Exim would claim a syntax error in any
2965 header after the first one which had an odd number of characters
2968 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2969 callout verification, Exim cached a "reject" for the entire domain. This
2970 is correct for most verifications, but it is not correct for a recipient
2971 verification with use_sender or use_postmaster set, because in that case
2972 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2973 case of MAIL FROM:<> rejection from other early rejections (e.g.
2974 rejection of HELO). When verifying a recipient using a non-null MAIL
2975 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2976 Whatever the result of the callout, the value of the domain cache is
2977 left unchanged (for any other kind of callout, getting as far as trying
2978 RCPT means that the domain itself is ok).
2980 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2983 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2984 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2985 session, the daemon ignores ECONNECT errors and logs others; it now
2986 ignores EPIPE as well.
2988 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2989 (quoted-printable decoding).
2991 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2992 later the small subsequent patch to fix an introduced bug.
2994 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2996 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2998 PH/08 An error is now given if message_size_limit is specified negative.
3000 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3001 to be given (somewhat) arbitrary names.
3003 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3006 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3007 miscellaneous code fixes
3009 PH/10 Added the log_reject_target ACL modifier to specify where to log
3012 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3013 hostname. This is wrong, because it relates to the incoming message (and
3014 probably the interface on which it is arriving) and not to the outgoing
3015 callout (which could be using a different interface). This has been
3016 changed to use the value of the helo_data option from the smtp transport
3017 instead - this is what is used when a message is actually being sent. If
3018 there is no remote transport (possible with a router that sets up host
3019 addresses), $smtp_active_hostname is used.
3021 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3022 tweaks were necessary in order to get it to work (see also 21 below):
3023 (a) The code assumed that strncpy() returns a negative number on buffer
3024 overflow, which isn't the case. Replaced with Exim's string_format()
3026 (b) There were several signed/unsigned issues. I just did the minimum
3027 hacking in of casts. There is scope for a larger refactoring.
3028 (c) The code used strcasecmp() which is not a standard C function.
3029 Replaced with Exim's strcmpic() function.
3030 (d) The code set only $1; it now sets $auth1 as well.
3031 (e) A simple test gave the error "authentication client didn't specify
3032 service in request". It would seem that Dovecot has changed its
3033 interface. Fortunately there's a specification; I followed it and
3034 changed what the client sends and it appears to be working now.
3036 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3039 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3040 address A is aliased to B and C, where B exists and C does not. Without
3041 -v the output is "A verified" because verification stops after a
3042 successful redirection if more than one address is generated. However,
3043 with -v the child addresses are also verified. Exim was outputting "A
3044 failed to verify" and then showing the successful verification for C,
3045 with its parentage. It now outputs "B failed to verify", showing B's
3046 parentage before showing the successful verification of C.
3048 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3049 look up a TXT record in a specific list after matching in a combined
3052 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3053 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3054 they consult the DNS. I had assumed they would set it the way they
3055 wanted; and indeed my experiments on Linux seem to show that in some
3056 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3057 To be on the safe side, however, I have now made the interface to
3058 host_find_byname() similar to host_find_bydns(), with an argument
3059 containing the DNS resolver options. The host_find_byname() function now
3060 sets these options at its start, just as host_find_bydns() does. The smtp
3061 transport options dns_qualify_single and dns_search_parents are passed to
3062 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3063 of host_find_byname() use the default settings of RES_DEFNAMES
3064 (qualify_single) but not RES_DNSRCH (search_parents).
3066 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3067 spool_read_header() do less string testing, by means of a preliminary
3068 switch on the second character of optional "-foo" lines. (This is
3069 overdue, caused by the large number of possibilities that now exist.
3070 Originally there were few.) While I was there, I also converted the
3071 str(n)cmp tests so they don't re-test the leading "-" and the first
3072 character, in the hope this might squeeze out yet more improvement.
3074 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3075 flag allowing group syntax was set by the header_syntax check but not
3076 turned off, possible causing trouble later; (2) The flag was not being
3077 set at all for the header_verify test, causing "group"-style headers to
3078 be rejected. I have now set it in this case, and also caused header_
3079 verify to ignore an empty address taken from a group. While doing this, I
3080 came across some other cases where the code for allowing group syntax
3081 while scanning a header line wasn't quite right (mostly, not resetting
3082 the flag correctly in the right place). These bugs could have caused
3083 trouble for malformed header lines. I hope it is now all correct.
3085 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3086 with the "reply" argument non-NULL. The code, however (which originally
3087 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3088 but it didn't always do it. This confused somebody who was copying the
3089 code for some other use. I have removed all the tests.
3091 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3092 feature that was used to support insecure browsers during the U.S. crypto
3093 embargo. It requires special client support, and Exim is probably the
3094 only MTA that supported it -- and would never use it because real RSA is
3095 always available. This code has been removed, because it had the bad
3096 effect of slowing Exim down by computing (never used) parameters for the
3097 RSA_EXPORT functionality.
3099 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3100 authenticator to fail if there's a tab character in the incoming data
3101 (there should never be unless someone is messing about, as it's supposed
3102 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3103 if the connection is using TLS or if the remote IP is the same as the
3104 local IP, and the "valid-client-cert option" if a client certificate has
3107 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3108 authenticators. This can be used for authorization after authentication
3109 succeeds. (In the case of plaintext, it servers for both authentication
3112 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3113 if any retry times were supplied.
3115 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3116 connection, where there is no client IP address to check. In this
3117 situation, the verify now always succeeds.
3119 PH/25 Applied John Jetmore's -Mset patch.
3121 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3123 PH/27 In a string expansion for a processed (not raw) header when multiple
3124 headers of the same name were present, leading whitespace was being
3125 removed from all of them, but trailing whitespace was being removed only
3126 from the last one. Now trailing whitespace is removed from each header
3127 before concatenation. Completely empty headers in a concatenation (as
3128 before) are ignored.
3130 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3131 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3133 PH/29 [Removed. This was a change that I later backed out, and forgot to
3134 correct the ChangeLog entry (that I had efficiently created) before
3135 committing the later change.]
3137 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3138 address errors (4xx response to RCPT) over the same connection as other
3139 messages routed to the same hosts. Such deliveries are always "forced",
3140 so retry times are not inspected. This resulted in far too many retries
3141 for the affected addresses. The effect occurred only when there were more
3142 hosts than the hosts_max_try setting in the smtp transport when it had
3143 the 4xx errors. Those hosts that it had tried were not added to the list
3144 of hosts for which the message was waiting, so if all were tried, there
3145 was no problem. Two fixes have been applied:
3147 (i) If there are any address or message errors in an SMTP delivery, none
3148 of the hosts (tried or untried) are now added to the list of hosts
3149 for which the message is waiting, so the message should not be a
3150 candidate for sending over the same connection that was used for a
3151 successful delivery of some other message. This seems entirely
3152 reasonable: after all the message is NOT "waiting for some host".
3153 This is so "obvious" that I'm not sure why it wasn't done
3154 previously. Hope I haven't missed anything, but it can't do any
3155 harm, as the worst effect is to miss an optimization.
3157 (ii) If, despite (i), such a delivery is accidentally attempted, the
3158 routing retry time is respected, so at least it doesn't keep
3159 hammering the server.
3161 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3162 in ${readsocket because some servers need this prod.
3164 PH/32 Added some extra debug output when updating a wait-xxx database.
3166 PH/33 The hint "could be header name not terminated by colon", which has been
3167 given for certain expansion errors for a long time, was not being given
3168 for the ${if def:h_colon_omitted{... case.
3170 PH/34 The spec says: "With one important exception, whenever a domain list is
3171 being scanned, $domain contains the subject domain." There was at least
3172 one case where this was not true.
3174 PH/35 The error "getsockname() failed: connection reset by peer" was being
3175 written to the panic log as well as the main log, but it isn't really
3176 panic-worthy as it just means the connection died rather early on. I have
3177 removed the panic log writing for the ECONNRESET error when getsockname()
3180 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3181 runs only) independently of the message's sender address. This meant
3182 that, if the 4xx error was in fact related to the sender, a different
3183 message to the same recipient with a different sender could confuse
3184 things. In particular, this can happen when sending to a greylisting
3185 server, but other circumstances could also provoke similar problems.
3186 I have changed the default so that the retry time for these errors is now
3187 based a combination of the sender and recipient addresses. This change
3188 can be overridden by setting address_retry_include_sender=false in the
3191 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3192 remote server are returned as part of bounce messages. This was not
3193 happening for LMTP over a pipe (the lmtp transport), but now it is the
3194 same for both kinds of LMTP.
3196 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3197 in header lines that were in fact CNAMEs. This is no longer the case.
3199 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3200 and queue runs started by the daemon processed all messages. This has
3201 been fixed so that -R and -S can now usefully be given with -q<time>.
3203 PH/40 Import PCRE release 6.7 (fixes some bugs).
3205 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3207 PH/42 Give an error if -q is specified more than once.
3209 PH/43 Renamed the variables $interface_address and $interface_port as
3210 $received_ip_address and $received_port, to make it clear that these
3211 values apply to message reception, and not to the outgoing interface when
3212 a message is delivered. (The old names remain recognized, of course.)
3214 PH/44 There was no timeout on the connect() call when using a Unix domain
3215 socket in the ${readsocket expansion. There now is.
3217 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3218 be meaningful with "accept".
3220 SC/01 Eximstats V1.43
3221 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3223 SC/02 Eximstats V1.44
3224 Use a glob alias rather than an array ref in the generated
3225 parser. This improves both readability and performance.
3227 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3228 Collect SpamAssassin and rejection statistics.
3229 Don't display local sender or destination tables unless
3230 there is data to show.
3231 Added average volumes into the top table text output.
3233 SC/04 Eximstats V1.46
3234 Collect data on the number of addresses (recipients)
3235 as well as the number of messages.
3237 SC/05 Eximstats V1.47
3238 Added 'Message too big' to the list of mail rejection
3239 reasons (thanks to Marco Gaiarin).
3241 SC/06 Eximstats V1.48
3242 Mainlog lines which have GMT offsets and are too short to
3243 have a flag are now skipped.
3245 SC/07 Eximstats V1.49 (Alain Williams)
3246 Added the -emptyok flag.
3248 SC/08 Eximstats V1.50
3249 Fixes for obtaining the IP address from reject messages.
3251 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3252 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3253 whitespace changes from 4.64-PH/27
3255 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3258 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3259 are found, allow negative numbers in numeric criteria)
3261 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3263 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3264 to match changes made in 4.64-PH/43
3266 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3268 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3269 "domain" is actually an IP address, and force a failure. This locks out
3270 those revolvers/nameservers that support "A-for-A" lookups, in
3271 contravention of the specifications.
3273 PH/48 When a host name was looked up from an IP address, and the subsequent
3274 forward lookup of the name timed out, the host name was left in
3275 $sender_host_name, contrary to the specification.
3277 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3278 restricted to single-key lookups, Exim was not diagnosing an error if
3279 * or *@ was used with a query-style lookup.
3281 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3283 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3284 long ago, but noone interested enough thought of it. Let's just say that
3285 the "1.1" means that there are some new functions that weren't there at
3286 some point in the past.
3288 PH/51 Error processing for expansion failure of helo_data from an smtp
3289 transport during callout processing was broken.
3291 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3292 tested/used via the -bh/-bhc/-bs options.
3294 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3295 bug, fixed in subsequent PCRE releases).
3297 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3298 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3300 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3306 SC/01 Use a glob alias rather than an array ref in eximstats generated
3307 parser. This improves both readability and performance.
3309 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3310 Don't display local sender or destination tables in eximstats unless
3311 there is data to show.
3312 Added average volumes into the eximstats top table text output.
3314 SC/03 Collect data on the number of addresses (recipients) as well
3315 as the number of messages in eximstats.
3317 TF/01 Correct an error in the documentation for the redirect router. Exim
3318 does (usually) call initgroups() when daemonizing.
3320 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3321 with consistent privilege compared to when running as a daemon.
3323 TF/03 Note in the spec that $authenticated_id is not set for local
3324 submissions from trusted users.
3326 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3327 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3329 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3330 by adding some example configuration directives to the default
3331 configuration file. A little bit of work is required to uncomment the
3332 directives and define how usernames and passwords are checked, but
3333 there is now a framework to start from.
3335 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3336 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3337 without this. I don't know how relevant this is to other LDAP libraries.
3339 PH/02 Add the verb name to the "unknown ACL verb" error.
3341 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3343 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3345 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3346 directory not expanded when it should be if an expanded home directory
3347 was set for the address (which is overridden by the transport).
3349 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3352 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3353 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3354 because it is too late at that time, and has no effect.
3356 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3357 security issue with \' (bugzilla #107). I could not use the
3358 PQescapeStringConn() function, because it needs a PGconn value as one of
3361 PH/08 When testing addresses using -bt, indicate those final addresses that
3362 are duplicates that would not cause an additional delivery. At least one
3363 person was confused, thinking that -bt output corresponded to deliveries.
3364 (Suppressing duplicates isn't a good idea as you lose the information
3365 about possibly different redirections that led to the duplicates.)
3367 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3368 systems where poll() doesn't work, in particular OS X.
3370 PH/10 Added more information to debugging output for retry time not reached.
3372 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3373 operations in malware.c.
3375 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3378 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3379 syslog_duplication set false, log lines that would normally be written
3380 both the the main log and to the reject log were not written to syslog at
3383 PH/14 In the default configuration, change the use of "message" in ACL warn
3384 statements to "add_header".
3386 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3387 not followed by a command (e.g. "seen endif").
3389 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3390 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3393 PH/17 Added extra conditions to the default value of delay_warning_condition
3397 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3398 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3399 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3402 The Auto-Submitted: and various List- headers are standardised, whereas I
3403 don't think Precedence: ever was.
3405 PH/18 Refactored debugging code in route_finduser() to show more information,
3406 in particular, the error code if getpwnam() issues one.
3408 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3409 This is apparently needed in addition to the PH/07 change above to avoid
3410 any possible encoding problems.
3412 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3413 but not after initializing Perl.
3415 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3416 output them only if debugging. By default they are written stderr,
3417 apparently, which is not desirable.
3419 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3422 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3425 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3427 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3428 authenticated or an ident call has been made. Suppress the default
3429 values for $authenticated_id and $authenticated_sender (but permit -oMai
3430 and -oMas) when testing with -bh.
3432 PH/24 Re-jigged the order of the tests in the default configuration so that the
3433 tests for valid domains and recipients precede the DNS black list and CSA
3434 tests, on the grounds that those ones are more expensive.
3436 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3437 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3438 This bug exists in every version of Exim that I still have, right back to
3441 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3442 However, an attempt to turn on case-sensitivity in a regex key by
3443 including (?-i) didn't work because the subject string was already
3444 lowercased, and the effects were non-intuitive. It turns out that a
3445 one-line patch can be used to allow (?-i) to work as expected.
3451 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3452 other effects) broke the use of negated acl sub-conditions.
3454 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3457 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3458 "Deny" causes Exim to reject the incoming connection with a 554 error.
3459 Unfortunately, if there is a major crisis, such as a disk failure,
3460 tcp-wrappers gives "deny", whereas what one would like would be some
3461 kind of temporary error. A kludge has been added to help with this.
3462 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3463 554 error is used if errno is still zero or contains ENOENT (which occurs
3464 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3467 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3469 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3470 errors. Otherwise a message that provokes a temporary error (when other
3471 messages do not) can cause a whole host to time out.
3473 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3474 addresses were routed directly to files or pipes from a redirect router.
3475 File deliveries just didn't batch; pipe deliveries might have suffered
3478 PH/06 A failure to get a lock for a hints database would erroneously always say
3479 "Failed to get write lock", even when it was really a read lock.
3481 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3482 of 0600. This has been changed to use the value of the lockfile_mode
3483 option (which defaults to 0600).
3485 PH/08 Applied small patch from the Sieve maintainer.
3487 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3488 folder from quota calculations, a direct delivery into this folder messed
3489 up the contents of the maildirsize file. This was because the regex was
3490 used only to exclude .Trash (or whatever) when the size of the mailbox
3491 was calculated. There was no check that a delivery was happening into an
3492 excluded directory. This bug has been fixed by ignoring all quota
3493 processing for deliveries into excluded directories.
3495 PH/10 Added the maildirfolder_create_regex option to appendfile.
3501 PH/01 The code for finding all the local interface addresses on a FreeBSD
3502 system running IPv6 was broken. This may well have applied to all BSD
3503 systems, as well as to others that have similar system calls. The broken
3504 code found IPv4 interfaces correctly, but gave incorrect values for the
3505 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3506 that it would not match correctly against @[] and not recognize the IPv6
3509 PH/02 The ipliteral router was not recognizing addresses of the form user@
3510 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3512 PH/03 Added disable_ipv6.
3514 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3515 decoded form, because it is most often used to construct To: headers
3516 lines in autoreplies, and the decoded form may well be syntactically
3517 invalid. However, $reply_address has leading white space removed, and all
3518 newlines turned into spaces so that the autoreply transport does not
3521 PH/05 If group was specified without a user on a router, and no group or user
3522 was specified on a transport, the group from the router was ignored.
3524 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3525 for visible compile-time settings that can be used to change these
3526 numbers, for those that want even more. Backwards compatibility with old
3527 spool files has been maintained. However, going back to a previous Exim
3528 release will lost any variables that are in spool files.
3530 PH/07 Two small changes when running in the test harness: increase delay when
3531 passing a TCP/IP connection to a new process, in case the original
3532 process has to generate a bounce, and remove special handling of
3533 127.0.0.2 (sic), which is no longer necessary.
3535 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3536 be the same on different OS.
3538 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3541 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3542 whether --show-vars was specified or not
3544 JJ/02 exipick: Added support for new ACL variable spool format introduced
3547 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3548 syntactically invalid From: or Reply-to: line, and a filter used this to
3549 generate an autoreply, and therefore failed to obtain an address for the
3550 autoreply, Exim could try to deliver to a non-existent relative file
3551 name, causing unrelated and misleading errors. What now happens is that
3552 it logs this as a hard delivery error, but does not attempt to create a
3555 PH/11 The exinext utility has a -C option for testing purposes, but although
3556 the given file was scanned by exinext itself; it wasn't being passed on
3557 when Exim was called.
3559 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3560 an end-of-file indication when reading a command response.
3562 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3563 compiled. In many other places in Exim, IPv6 addresses are always
3564 recognized, so I have changed this. It also means that IPv4 domain
3565 literals of the form [IPV4:n.n.n.n] are now always recognized.
3567 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3568 used if the router is not running as root, for example, when verifying at
3569 ACL time, or when using -bh. The debugging output from this situation was
3570 non-existent - all you got was a failure to exec. I have made two
3573 (a) Failures to set uid/gid, the current directory, or a process leader
3574 in a subprocess such as that created by queryprogram now generate
3575 suitable debugging output when -d is set.
3577 (b) The queryprogram router detects when it is not running as root,
3578 outputs suitable debugging information if -d is set, and then runs
3579 the subprocess without attempting to change uid/gid.
3581 PH/15 Minor change to Makefile for building test_host (undocumented testing
3584 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3585 additional section of a DNS packet that returns MX or SRV records.
3586 Instead, it always explicitly searches for A/AAAA records. This avoids
3587 major problems that occur when a DNS server includes only records of one
3588 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3589 fixed another bug: if SRV records were looked up and the corresponding
3590 address records were *not* found in the additional section, the port
3591 values from the SRV records were lost.
3593 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3594 using the correct key (the original address) when searching the retry
3595 rules in order to find which one to use for generating the retry hint.
3597 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3598 adding the default one. Similarly, if it contains a Reply-To: header, the
3599 errors_reply_to option, if set, is not used.
3601 PH/19 When calculating a retry time, Exim used to measure the "time since
3602 failure" by looking at the "first failed" field in the retry record. Now
3603 it does not use this if it is later than than the arrival time of the
3604 message. Instead it uses the arrival time. This makes for better
3605 behaviour in cases where some deliveries succeed, thus re-setting the
3606 "first failed" field. An example is a quota failure for a huge message
3607 when small messages continue to be delivered. Without this change, the
3608 "time since failure" will always be short, possible causing more frequent
3609 delivery attempts for the huge message than are intended.
3610 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3612 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3613 $1, $2, $3) because the numerical variables can be reset during some
3614 expansion items (e.g. "match"), thereby losing the authentication data.
3616 PH/21 Make -bV show the size of off_t variables so that the test suite can
3617 decide whether to run tests for quotas > 2G.
3619 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3620 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3621 filecount value is greater than 2G or if a quota value is greater than 2G
3622 on a system where the size of off_t is not greater than 4, a panic error
3625 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3626 never match. The debug and -bh output now contains an explicit error
3627 message indicating a malformed IPv4 address or mask.
3629 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3630 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3631 PH/23 above applies.
3633 PH/25 Do not write to syslog when running in the test harness. The only
3634 occasion when this arises is a failure to open the main or panic logs
3635 (for which there is an explicit test).
3637 PH/26 Added the /no_tell option to "control=freeze".
3639 PH/27 If a host name lookup failed very early in a connection, for example, if
3640 the IP address matched host_lookup and the reverse lookup yielded a name
3641 that did not have a forward lookup, an error message of the form "no IP
3642 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3643 could be logged. Now it outputs the IP address instead of "NULL".
3645 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3646 allows the sender and the authenticated sender to be set when
3647 submitting a message from within Exim. Since child_open_exim() is
3648 documented for local_scan(), the new function should be too.
3650 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3651 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3652 results in an empty string is now treated as unset.
3654 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3656 PH/31 Added sender_verify_fail logging option.
3658 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3659 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3660 tidied the source and removed it altogether.
3662 PH/33 When a queue run was abandoned because the load average was too high, a
3663 log line was always written; now it is written only if the queue_run log
3664 selector is set. In addition, the log line for abandonment now contains
3665 information about the queue run such as the pid. This is always present
3666 in "start" and "stop" lines but was omitted from the "abandon" line.
3668 PH/34 Omit spaces between a header name and the colon in the error message that
3669 is given when verify = headers_syntax fails (if there are lots of them,
3670 the message gets confusing).
3672 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3673 names, as there are now some PTR records that contain slashes. This check
3674 is only to protect against broken name servers that fall over on strange
3675 characters, so the fact that it applies to all lookups doesn't matter.
3677 PH/36 Now that the new test suite is complete, we can remove some of the
3678 special code in Exim that was needed for the old test suite. For example,
3679 sorting DNS records because real resolvers return them in an arbitrary
3680 order. The new test suite's fake resolver always returns records in the
3683 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3684 bounces) except when queue_only is set, to avoid logging races between
3685 the different processes.
3687 PH/38 Panic-die if .include specifies a non-absolute path.
3689 PH/39 A tweak to the "H" retry rule from its user.
3691 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3692 a label. They prevented compilation on older perls.
3694 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3695 a warning to be raised on newish perls.
3697 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3698 on queue. Changes to match documented behaviour of showing count of
3699 messages matching specified criteria.
3701 PH/40 Changed the default ident timeout from 30s to 5s.
3703 PH/41 Added support for the use of login_cap features, on those BSD systems
3704 that have them, for controlling the resources used by pipe deliveries.
3706 PH/42 The content-scanning code uses fopen() to create files in which to put
3707 message data. Previously it was not paying any attention to the mode of
3708 the files. Exim runs with umask(0) because the rest of the code creates
3709 files with open(), and sets the required mode explicitly. Thus, these
3710 files were ending up world-writeable. This was not a big issue, because,
3711 being within the spool directory, they were not world-accessible. I have
3712 created a function called modefopen, which takes an additional mode
3713 argument. It sets umask(777), creates the file, chmods it to the required
3714 mode, then resets the umask. All the relevant calls to fopen() in the
3715 content scanning code have been changed to use this function.
3717 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3718 to 24 hours. This avoids potential overflow problems when processing G
3719 and H retry rules. I suspect nobody ever tinkers with this value.
3721 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3723 PH/45 When the plaintext authenticator is running as a client, the server's
3724 challenges are checked to ensure they are valid base64 strings. By
3725 default, the authentication attempt is cancelled if an invalid string is
3726 received. Setting client_ignore_invalid_base64 true ignores these errors.
3727 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3728 they are received. Thus, the responses can be made to depend on the
3729 challenges. If an invalid string is ignored, an empty string is placed in
3732 PH/46 Messages that are created by the autoreply transport now contains a
3733 References: header, in accordance with RFCs 2822 and 3834.
3735 PH/47 Added authenticated_sender_force to the smtp transport.
3737 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3739 PH/49 Installed latest patch from the Sieve maintainer.
3741 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3742 was also set, the appendfile transport was unnecessarily scanning a
3743 directory of message files (e.g. for maildir delivery) to find the count
3744 of files (along with the size), even though it did not need this
3745 information. It now does the scan only if it needs to find either the
3746 size of the count of files.
3748 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3750 PH/52 Two bugs concerned with error handling when the smtp transport is
3753 (i) Exim was not creating retry information for temporary errors given
3754 for individual recipients after the DATA command when the smtp transport
3755 was used in LMTP mode. This meant that they could be retried too
3756 frequently, and not timed out correctly.
3758 (ii) Exim was setting the flag that allows error details to be returned
3759 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3760 recipients that were returned after the DATA command.
3762 PH/53 This is related to PH/52, but is more general: for any failing address,
3763 when detailed error information was permitted to be returned to the
3764 sender, but the error was temporary, then after the final timeout, only
3765 "retry timeout exceeded" was returned. Now it returns the full error as
3766 well as "retry timeout exceeded".
3768 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3769 do this, and (what is worse) MTAs that accept it.
3771 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3772 will now be deprecated.
3774 PH/56 New os.c-cygwin from the Cygwin maintainer.
3776 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3777 formats (previously only available in exim formats via -bpr, -bpru,
3778 and -bpra. Now also available in native and exiqgrep formats)
3780 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3781 with very large, slow to parse queues
3783 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3785 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3787 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3788 responses to authentication challenges, though it was showing the
3789 challenges; (ii) I've removed the CR characters from the debug output for
3792 PH/58 Allow for the insertion of a newline as well as a space when a string
3793 is turned into more than one encoded-word during RFC 2047 encoding. The
3794 Sieve code now uses this.
3796 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3797 data_4xx, lost_connection, tls_required.
3799 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3800 message was being sent as an SMTP response.
3802 PH/61 Add -l and -k options to exicyclog.
3804 PH/62 When verifying, if an address was redirected to one new address, so that
3805 verification continued, and the new address failed or deferred after
3806 having set something in $address_data, the value of $address_data was not
3807 passed back to the ACL. This was different to the case when no
3808 redirection occurred. The value is now passed back in both cases.
3810 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3811 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3812 use login_cap.h, so on its own it isn't the distinguishing feature. The
3813 new name refers directly to the setclassresources() function.
3815 PH/65 Added configuration files for NetBSD3.
3817 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3819 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3820 is preferred over IPv4.
3822 PH/68 The bounce_return_message and bounce_return_body options were not being
3823 honoured for bounces generated during the reception of non-SMTP messages.
3824 In particular, this applied to messages rejected by the ACL. This bug has
3825 been fixed. However, if bounce_return_message is true and bounce_return_
3826 body is false, the headers that are returned for a non-SMTP message
3827 include only those that have been read before the error was detected.
3828 (In the case of an ACL rejection, they have all been read.)
3830 PH/69 The HTML version of the specification is now built in a directory called
3831 spec_html instead of spec.html, because the latter looks like a path with
3832 a MIME-type, and this confuses some software.
3834 PH/70 Catch two compiler warnings in sieve.c.
3836 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3837 function verify_get_ident() calls ip_connect() to connect a socket, but
3838 if the "connect()" function timed out, ip_connect() used to close the
3839 socket. However, verify_get_ident() also closes the socket later, and in
3840 between Exim writes to the log, which may get opened at this point. When
3841 the socket was closed in ip_connect(), the log could get the same file
3842 descriptor number as the socket. This naturally causes chaos. The fix is
3843 not to close the socket in ip_connect(); the socket should be closed by
3844 the function that creates it. There was only one place in the code where
3845 this was missing, in the iplookup router, which I don't think anybody now
3846 uses, but I've fixed it anyway.
3848 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3849 well as to direct DNS lookups. Otherwise the handling of names in host
3850 lists is inconsistent and therefore confusing.
3856 PH/01 Two changes to the default runtime configuration:
3858 (1) Move the checks for relay_from_hosts and authenticated clients from
3859 after to before the (commented out) DNS black list checks.
3861 (2) Add control=submission to the relay_from_hosts and authenticated
3862 clients checks, on the grounds that messages accepted by these
3863 statements are most likely to be submissions.
3865 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3867 (1) Generate an error if the third argument for the ${prvs expansion is
3870 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3873 (3) Reset the variables that are obtained from the first argument of
3874 ${prvscheck and used in the second argument before leaving the code,
3875 because their memory is reclaimed, so using them afterwards may do
3878 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3879 one (it's much easier than Tom thought :-).
3881 (5) Because of (4), we can now allow for the use of $prvscheck_result
3882 inside the third argument.
3884 PH/03 For some reason, the default setting of PATH when running a command from
3885 a pipe transport was just "/usr/bin". I have changed it to
3888 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3889 anything to be listed in the output from -bV.
3891 PH/05 When a filter generated an autoreply, the entire To: header line was
3892 quoted in the delivery log line, like this:
3894 => >A.N.Other <ano@some.domain> <original@ddress> ...
3896 This has been changed so that it extracts the operative address. There
3897 may be more than one such address. If so, they are comma-separated, like
3900 => >ano@some.domain,ona@other.domain <original@ddress> ...
3902 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3903 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3904 not being looked up in the rDNS to get a host name, Exim was showing the
3905 IP address twice in Received: lines, even though the IP addresses were
3906 identical. For example:
3908 Received: from [1.2.3.4] (helo=[1.2.3.4])
3910 However, if the real host name was known, it was omitting the HELO data
3911 if it matched the actual IP address. This has been tidied up so that it
3912 doesn't show the same IP address twice.
3914 PH/07 When both +timestamp and +memory debugging was on, the value given by
3915 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3916 called by the debug printing, thereby overwriting the timestamp buffer.
3917 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3919 PH/08 When the original message was included in an autoreply transport, it
3920 always said "this is a copy of the message, including all the headers",
3921 even if body_only or headers_only was set. It now gives an appropriate
3924 PH/09 Applied a patch from the Sieve maintainer which:
3926 o fixes some comments
3927 o adds the (disabled) notify extension core
3928 o adds some debug output for the result of if/elsif tests
3929 o points to the current vacation draft in the documentation
3930 and documents the missing references header update
3934 o fixes a bug in processing the envelope test (when testing
3935 multiple envelope elements, the last element determined the
3938 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3939 Electronic Mail") by including:
3941 Auto-submitted: auto-generated
3943 in the messages that it generates (bounce messages and others, such as
3944 warnings). In the case of bounce messages for non-SMTP messages, there was
3945 also a typo: it was using "Auto_submitted" (underscore instead of
3946 hyphen). Since every message generated by Exim is necessarily in response
3947 to another message, thes have all been changed to:
3949 Auto-Submitted: auto-replied
3951 in accordance with these statements in the RFC:
3953 The auto-replied keyword:
3955 - SHOULD be used on messages sent in direct response to another
3956 message by an automatic process,
3958 - MUST NOT be used on manually-generated messages,
3960 - MAY be used on Delivery Status Notifications (DSNs) and Message
3961 Disposition Notifications (MDNs),
3963 - MUST NOT be used on messages generated by automatic or periodic
3964 processes, except for messages which are automatic responses to
3967 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3968 to the default Received: header definition.
3970 PH/12 Added log selector acl_warn_skipped (default on).
3972 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3973 variables because (a) they are in the wrong storage pool and (b) even if
3974 they were copied, it wouldn't work properly because of the caching.
3976 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3977 checking when decoding. Apparently there are clients that generate
3978 overlong encoded strings. Why am I not surprised?
3980 PH/15 If the first argument of "${if match_address" was not empty, but did not
3981 contain an "@" character, Exim crashed. Now it writes a panic log message
3982 and treats the condition as false.
3984 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3986 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3987 extension "envelope-auth". The code is finished and in agreement with
3988 other implementations, but there is no documentation so far and in fact,
3989 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3990 not changing the active code.
3992 Print executed "if" and "elsif" statements when debugging is used. This
3993 helps a great deal to understand what a filter does.
3995 Document more things not specified clearly in RFC3028. I had all this
3996 sorted out, when out of a sudden new issues came to my mind. Oops."
3998 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4001 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4002 canonical form (as documented). However, after a host name lookup from
4003 the IP address, check_host() was doing a simple string comparison with
4004 addresses acquired from the DNS when checking that the found name did
4005 have the original IP as one of its addresses. Since any found IPv6
4006 addresses are likely to be in abbreviated form, the comparison could
4007 fail. Luckily, there already exists a function for doing the comparison
4008 by converting both addresses to binary, so now that is used instead of
4009 the text comparison.
4011 PH/20 There was another similar case to PH/19, when a complete host name was
4012 given in a host list; looking up its IP address could give an abbreviated
4013 form, whereas the current host's name might or might not be abbreviated.
4014 The same fix has been applied.
4020 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4021 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4024 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4025 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4027 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4029 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4030 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4031 Also, for "Auto-Submitted", treat anything other than "no" as
4032 non-personal, in accordance with RFC 3834. (Previously it treated
4033 anything starting "auto-" as non-personal.)
4035 TF/01 The control=submission/name=... option had a problem with syntax
4036 errors if the name included a slash character. The /name= option
4037 now slurps the rest of the string, so it can include any characters
4038 but it must come last in the list of options (after /sender_retain
4041 PH/05 Some modifications to the interface to the fake nameserver for the new
4049 TK/01 Added the "success_on_redirect" address verification option. See
4050 NewStuff for rationale and an example.
4052 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4054 PH/02 Patch to exigrep to allow it to work on syslog lines.
4056 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4057 fread() to skip over the body file's header line, because in Cygwin the
4058 header line is locked and is inaccessible.
4060 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4061 co-exist for some time) to make it clear that it is the Exim ID that is
4062 referenced, not the Message-ID: header line.
4064 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4065 string_format() function, because snprintf() does not exist on all
4068 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4069 ${stat: expansion item.
4071 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4072 protocol synchronization error", to keep the pedants happy.
4074 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4075 well as for IRIX systems, when gcc is being used. See the host.c source
4078 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4080 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4083 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4084 transport and to the smtp transport in LMTP mode.
4086 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4088 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4089 run a filter in a subprocess. This could lead to confusion in subsequent
4090 lookups in the parent process. There should also be a search_tidyup() at
4091 the end of the subprocess.
4093 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4094 only if the host matched helo_try_verify_hosts, which caused the
4095 verification to occur when the EHLO/HELO command was issued. The ACL just
4096 tested the remembered result. Now, if a previous verification attempt has
4097 not happened, "verify = helo" does it there and then.
4099 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4101 TK/03 Fix log output including CR from clamd.
4103 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4104 exist provoked a memory error which could cause a segfault.
4106 PH/15 Installed PCRE 6.2
4108 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4110 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4111 of the problem. Specifically, suggested +O2 rather than +O1 for the
4114 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4116 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4117 record, the port was not correctly logged when the outgoing_port log
4118 selector was set (it logged the transort's default port).
4120 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4121 fallback_hosts, and "hosts" in the smtp transport.
4123 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4124 host errors such as "Connection refused".
4126 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4127 authentication with radiusclient 0.4.9:
4129 - Error returned from rc_read_config was caught wrongly
4130 - Username/password not passed on to radius server due to wrong length.
4132 The presumption is that some radiusclient API changes for 4.51/PH/17
4133 were not taken care of correctly. The code is still untested by me (my
4134 Linux distribution still has 0.3.2 of radiusclient), but it was
4135 contributed by a Radius user.
4137 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4138 expanding the "port" option of the smtp transport.
4140 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4141 while reading a MIME header. Thanks to Tom Hughes for a patch.
4143 PH/24 Include config.h inside local_scan.h so that configuration settings are
4146 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4147 that in an ACL for RCPT (for example), you can examine exactly what was
4150 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4151 commands, but it was not correctly comparing the address with the actual
4152 client host address. Thus, it would show the EHLO address in Received:
4153 header lines when this was not necessary.
4155 PH/27 Added the % operator to ${eval:}.
4157 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4158 it should be ignoring failures (because with -C, for example, it has lost
4159 privilege). It wasn't ignoring creation failures other than "already
4162 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4165 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4166 because an input line was too long, either on its own, or by virtue of
4167 too many continuations, the temporary file was not being removed, and the
4168 return code was incorrect.
4170 PH/31 Missing "BOOL" in function definition in filtertest.c.
4172 PH/32 Applied Sieve patches from the maintainer.
4174 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4176 PH/33 Added "verify = not_blind".
4178 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4179 Local/Makefile (with some defaults set). These are used in built scripts
4180 such as exicyclog, but they have never been used in the exim_install
4181 script (though there are many overriding facilities there). I have
4182 arranged that the exim_install script now takes note of these two
4185 PH/35 Installed configuration files for Dragonfly.
4187 PH/36 When a locally submitted message by a trusted user did not contain a
4188 From: header, and the sender address was obtained from -f or from an SMTP
4189 MAIL command, and the trusted user did not use -F to supply a sender
4190 name, $originator_name was incorrectly used when constructing a From:
4191 header. Furthermore, $originator_name was used for submission mode
4192 messages from external hosts without From: headers in a similar way,
4193 which is clearly wrong.
4195 PH/37 Added control=suppress_local_fixups.
4197 PH/38 When log_selector = +received_sender was set, and the addition of the
4198 sender made the log line's construction buffer exactly full, or one byte
4199 less than full, an overflow happened when the terminating "\n" was
4202 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4203 when the result of a list match is failure because a DNS lookup failed.
4205 PH/40 RM_COMMAND is now used in the building process.
4207 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4208 the "build-* directories that it finds.
4210 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4211 address in a domain literal was a prefix of an interface address.
4213 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4214 when verifying a sender address, unless rewrite_headers is false.
4216 PH/44 Wrote a long comment about why errors_to addresses are verified as
4217 recipients, not senders.
4219 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4220 the ratelimit ACL was added.
4222 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4224 PH/46 Added extra information about PostgreSQL errors to the error string.
4226 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4227 avoiding the need to install special zones in a real server. This is
4228 backwards compatible; if it can't find the fake resolver, it drops back.
4229 Thus, both old and new test suites can be run.
4231 TF/02 Added util/ratelimit.pl
4233 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4234 clock is set back in time.
4236 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4237 Candler <B.Candler@pobox.com>.
4239 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4240 OK for addresses that are the result of redirections.
4242 PH/48 A number of further additions for the benefit of the new test suite,
4243 including a fake gethostbyname() that interfaces to the fake DNS resolver
4246 TF/06 The fix for widen_domains has also been applied to qualify_single and
4247 search_parents which are the other dnslookup options that can cause
4250 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4253 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4255 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4256 service" if it encountered an MX record with an empty target hostname.
4257 The message is now "an MX or SRV record indicated no SMTP service".
4259 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4260 if the DNS of the sending site is misconfigured. This is quite a
4261 common situation. This change restores the behaviour of treating a
4262 helo verification defer as a failure.
4264 PH/51 If self=fail was set on a router, the bounce message did not include the
4265 actual error message.
4271 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4273 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4274 command itself ended in error, the underlying message about the transport
4275 filter timeout was being overwritten with the pipe command error. Now the
4276 underlying error message should be appended to the second error message.
4278 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4280 PH/02 Reduce the amount of output that "make" produces by default. Full output
4281 can still be requested.
4283 PH/03 The warning log line about a condition test deferring for a "warn" verb
4284 was being output only once per connection, rather than after each
4285 occurrence (because it was using the same function as for successful
4286 "warn" verbs). This seems wrong, so I have changed it.
4288 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4289 it should not have, which might have caused a crash in the right
4290 circumstances, but probably never did.
4292 PH/04 Installed a modified version of Tony Finch's patch to make submission
4293 mode fix the return path as well as the Sender: header line, and to
4294 add a /name= option so that you can make the user's friendly name appear
4297 TF/03 Added the control = fakedefer ACL modifier.
4299 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4300 Mark Lowes for thorough testing.
4302 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4304 TK/03 Merged latest SRS patch from Miles Wilton.
4306 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4307 with the definition in sysexits.h (which is #included earlier).
4308 Fortunately, Exim does not actually use EX_OK. The code used to try to
4309 preserve the sysexits.h value, by assuming that macro definitions were
4310 scanned for macro replacements. I have been disabused of this notion,
4311 so now the code just undefines EX_OK before #including unistd.h.
4313 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4314 in the smtp transport. When a block could not be written in a single
4315 write() function, the timeout was being re-applied to each part-write.
4316 This seems wrong - if the receiver was accepting one byte at a time it
4317 would take for ever. The timeout is now adjusted when this happens. It
4318 doesn't have to be particularly precise.
4320 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4321 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4323 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4324 without a domain if the check to <postmaster@domain> fails.
4326 SC/01 Eximstats: added -xls and the ability to specify output files
4327 (patch written by Frank Heydlauf).
4329 SC/02 Eximstats: use FileHandles for outputting results.
4331 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4333 SC/04 Eximstats: fixed display of large numbers with -nvr option
4335 SC/05 Eximstats: fixed merging of reports with empty tables.
4337 SC/06 Eximstats: added the -include_original_destination flag
4339 SC/07 Eximstats: removed tabs and trailing whitespace.
4341 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4343 TK/06 MBOX spool code: Add real "From " MBOX separator line
4344 so the .eml file is really in mbox format (even though
4345 most programs do not really care). Patch from Alex Miller.
4347 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4348 The latter is generated from $received_to and is only set if the
4349 message has one envelope recipient. SA can use these headers,
4350 obviously out-of-the-box. Patch from Alex Miller.
4352 PH/08 The ${def test on a variable was returning false if the variable's
4353 value was "0", contrary to what the specification has always said!
4354 The result should be true unless the variable is empty.
4356 PH/09 The syntax error of a character other than { following "${if
4357 def:variable_name" (after optional whitespace) was not being diagnosed.
4358 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4359 accidental colon was present, for example, could give incorrect results.
4361 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4362 result is used (not including appendfile, where other changes are about
4365 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4366 This involved changing a lot of size variables from int to off_t. It
4367 should work with maildirs and everything.
4369 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4370 spamd dying while we are connected to it.
4372 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4375 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4376 function for BDB 4.3.
4378 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4380 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4381 the sources for PCRE have been re-arranged and more files are now
4384 PH/15 The code I had for printing potentially long long variables in PH/11
4385 above was not the best (it lost precision). The length of off_t variables
4386 is now inspected at build time, and an appropriate printing format (%ld
4387 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4388 to be "long long int" or "long int". This is needed for the internal
4389 formatting function string_vformat().
4391 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4392 the configuration file to be ":syslog", then the script "guesses" where
4393 the logs files are, rather than using the compiled in default. In our
4394 case the guess is not the same as the compiled default, so the script
4395 suddenly stopped working when I started to use syslog. The patch checks
4396 to see if log_file_path is "". If so, it attempts to read it from exim
4397 with no configuration file to get the compiled in version, before it
4398 falls back to the previous guessing code."
4400 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4401 implementing BATV in an Exim configuration. See NewStuff for the gory
4404 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4405 Makefile that are specific to HP-UX.
4407 PH/18 If the "use_postmaster" option was set for a recipient callout together
4408 with the "random" option, the postmaster address was used as the MAIL
4409 FROM address for the random test, but not for the subsequent recipient
4410 test. It is now used for both.
4412 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4413 patch removes a few documentation additions to RFC 3028, because the
4414 latest draft now contains them. It adds the new en;ascii-case comparator
4415 and a new error check for 8bit text in MIME parts. Comparator and
4416 require names are now matched exactly. I enabled the subaddress
4417 extension, but it is not well tested yet (read: it works for me)."
4419 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4420 rework some of the code of TK/09 above to avoid the hardwired use of
4421 "%lld" and "long long". Replaced the call to snprintf() with a call to
4424 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4425 records point to non-existent hosts", "retry timeout exceeded", and
4426 "retry time not reached for any host after a long failure period".
4428 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4429 experimental DomainKeys support:
4431 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4432 (2) On an error such as an illegally used "control", the wrong name for
4433 the control was given.
4435 These problems did NOT occur unless DomainKeys support was compiled.
4437 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4439 PH/24 Added ${if match_ip condition.
4441 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4442 databases so that it will be absolutely obvious if a crash occurs in the
4443 DB library. This is a regular occurrence (often caused by mis-matched
4446 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4447 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4448 picked up on a user's system that detects such things. There doesn't seem
4449 to be a gcc warning option for this - only an attribute that has to be
4450 put on the function's prototype. It seems that in Fedora Core 4 they have
4451 set this on a number of new functions. No doubt there will be more in due
4454 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4455 specify a transport. However, if an address that was verified by such a
4456 router was the subject of a callout, Exim crashed because it tried to
4457 read the rcpt_include_affixes from the non-existent transport. Now it
4458 just assumes that the setting of that option is false. This bug was
4459 introduced by 4.51/PH/31.
4461 PH/28 Changed -d+all to exclude +memory, because that information is very
4462 rarely of interest, but it makes the output a lot bigger. People tend to
4463 do -d+all out of habit.
4465 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4466 code in os-type was giving problems when libc.so lives in lib64, like on
4469 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4470 aren't the modern standard, and it seems that some systems' include files
4471 don't always have them. Exim was already checking for some of the newer
4472 ones like T_AAAA, and defining it itself. I've added checks for all the
4473 record types that Exim uses.
4475 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4476 not automatically generating a new one, as it is supposed to. This
4477 prevented TLS from working. If the file did exist, but contained invalid
4478 data, a new version was generated, as expected. It was only the case of a
4479 non-existent file that was broken.
4481 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4482 with a change in libdomainkeys > 0.64.
4484 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4485 from DNS. If the selector record carries the flag, it now has
4486 precedence over the domain-wide flag.
4488 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4490 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4491 the use of a port name that isn't defined in /etc/services) occurred, the
4492 message was deferred as in a normal delivery, and thus remained on the
4493 spool, instead of being failed because of the mua_wrapper setting. This
4494 is now fixed, and I tidied up some of the mua_wrapper messages at the
4497 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4498 the messages in a hash of arrays rather than using individual hashes.
4499 This is a bit cleaner and results in dramatic memory savings, albeit
4500 at a slight CPU cost.
4502 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4503 as requested by Marc Sherman.
4505 SC/10 Eximstats: added histograms for user specified patterns as requested
4508 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4510 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4511 fopen() in the content-scanning modules that did not already have it.
4517 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4518 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4520 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4522 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4524 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4525 to test Sieve filters that use "vacation".
4527 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4528 that changes the way the GnuTLS parameters are stored in the cache file.
4529 The new format can be generated externally. For backward compatibility,
4530 if the data in the cache doesn't make sense, Exim assumes it has read an
4531 old-format file, and it generates new data and writes a new file. This
4532 means that you can't go back to an older release without removing the
4535 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4536 work if there are any delivery delays because "one_time" forces the
4537 parent to be marked "delivered", so its unseen clone is never tried
4538 again. For this reason, Exim now forbids the simultaneous setting of
4541 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4542 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4543 entry if you want to know the details. The fix, however, neglected to
4544 consider the case when local delivery batching is involved. The test for
4545 "previously delivered" was not happening when checking to see if an
4546 address could be batched with a previous (undelivered) one; under
4547 certain circumstances this could lead to multiple deliveries to the same
4550 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4551 in its include files, and this causes problems building Exim.
4553 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4554 header_syntax) but Exim was just ignoring anything given after a slash.
4555 In particular, this caused confusion with an attempt to use "verify =
4556 reverse_host_lookup/defer_ok". An error is now given when options are
4557 supplied for verify items that do not have them. (Maybe reverse_host_
4558 lookup should have a defer_ok option, but that's a different point.)
4560 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4561 defined by RFC 821) to 2048, because there were problems with some AUTH
4562 commands, and RFC 1869 says the size should be increased for extended
4563 SMTP commands that take arguments.
4565 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4568 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4569 "unknown" error; now it says that the functionality isn't in the binary.
4571 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4572 an address' error message when a string expansion fails (syntax or
4573 whatever). Otherwise the password may appear in the log. Following change
4574 PH/42 below, there is no longer a chance of it appearing in a bounce
4577 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4579 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4580 of its addresses was ever tried. (Bugzilla bug #2.)
4582 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4583 the result incorrectly in the debug output. (It correctly added a newline
4584 to what was transported.)
4586 TF/01 Added $received_time.
4588 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4589 commented out examples of how to interface to a virus scanner and to
4590 SpamAssassin. Also added commented examples of av_scanner and
4591 spamd_address settings.
4593 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4594 and controls are allowed in which ACLs. There were a couple of minor
4595 errors. Some of the entries in the conditions table (which is a table of
4596 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4597 negation of where the condition IS allowed.
4599 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4601 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4602 header file does not have a version number, so I've had to invent a new
4603 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4604 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4605 radiusclient), but it was contributed by a Radius user.
4607 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4608 files or directories, for OpenSSL.
4610 PH/19 When an Exim process that is running as root has to create an Exim log
4611 file, it does so in a subprocess that runs as exim:exim so as to get the
4612 ownership right at creation (otherwise, other Exim processes might see
4613 the file with the wrong ownership). There was no test for failure of this
4614 fork() call, which would lead to the process getting stuck as it waited
4615 for a non-existent subprocess. Forks do occasionally fail when resources
4616 run out. I reviewed all the other calls to fork(); they all seem to check
4619 PH/20 When checking for unexpected SMTP input at connect time (before writing
4620 the banner), Exim was not dealing correctly with a non-positive return
4621 from the read() function. If the client had disconnected by this time,
4622 the result was a log entry for a synchronization error with an empty
4623 string after "input=" when read() returned zero. If read() returned -1
4624 (an event I could not check), uninitialized data bytes were printed.
4625 There were reports of junk text (parts of files, etc) appearing after
4628 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4630 PH/22 Added support for macro redefinition, and (re)definition in between
4631 driver and ACL definitions.
4633 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4634 forgetting to use the resulting value; it was using the unexpanded value.
4636 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4637 hadn't been configured. The fix is from Juergen Kreileder, who
4638 understands it better than I do:
4640 "Here's what I see happening with three configured cyrus_sasl
4641 authenticators configured (plain, login, cram-md5):
4643 On startup auth_cyrus_sasl_init() gets called for each of these.
4644 This means three calls to sasl_listmech() without a specified mech_list.
4645 => SASL tests which mechs of all available mechs actually work
4646 => three warnings about OTP not working
4647 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4649 With the patch, sasl_listmech() also gets called three times. But now
4650 SASL's mech_list option is set to the server_mech specified in the the
4651 authenticator. Or in other words, the answer from sasl_listmech()
4652 gets limited to just the mech you're testing for (which is different
4654 => the return list contains just 'plain' or 'login', 'cram-md5' or
4655 nothing depending on the value of ob->server_mech.
4657 I've just tested the patch: Authentication still works fine,
4658 unavailable mechs specified in the exim configuration are still
4659 caught, and the auth.log warnings about OTP are gone."
4661 PH/25 When debugging is enabled, the contents of the command line are added
4662 to the debugging output, even when log_selector=+arguments is not
4665 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4666 answer is "GNU", and only if the return is "GNU/something" is the answer
4669 PH/27 $acl_verify_message is now set immediately after the failure of a
4670 verification in an ACL, and so is available in subsequent modifiers. In
4671 particular, the message can be preserved by coding like this:
4673 warn !verify = sender
4674 set acl_m0 = $acl_verify_message
4676 Previously, $acl_verify_message was set only while expanding "message"
4677 and "log_message" when a very denied access.
4679 PH/28 Modified OS/os.c-Linux with
4681 -#ifndef OS_LOAD_AVERAGE
4682 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4684 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4685 nomenclature these days.)
4687 PH/29 Installed patch from the Sieve maintainer that adds the options
4688 sieve_useraddress and sieve_subaddress to the redirect router.
4690 PH/30 In these circumstances:
4691 . Two addresses routed to the same list of hosts;
4692 . First host does not offer TLS;
4693 . First host accepts first address;
4694 . First host gives temporary error to second address;
4695 . Second host offers TLS and a TLS session is established;
4696 . Second host accepts second address.
4697 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4698 and peerdn, if requested) that were in fact used only for the second
4701 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4702 attention to any local part prefix or suffix that was matched by the
4703 router that accepted the address. It now behaves in the same way as it
4704 does for delivery: the affixes are removed from the local part unless
4705 rcpt_include_affixes is set on the transport.
4707 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4708 timeout during the DATA phase of an incoming message.
4710 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4711 applied a patch sanctioned by the Sieve maintainer.
4713 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4714 the uid or gid is negative. A case of a negative gid caused this to be
4715 noticed. The fix allows for either to be negative.
4717 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4718 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4721 PH/36 The change PH/12 above was broken. Fixed it.
4723 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4724 the grounds that routing the same address twice would always produce the
4725 same answer. This might have been true once, but it is certainly no
4726 longer true now. Routing a child address may depend on the previous
4727 routing that produced that child. Some complicated redirection strategies
4728 went wrong when messages had multiple recipients, and made Exim's
4729 behaviour dependent on the order in which the addresses were given.
4731 I have moved the duplicate checking until after the routing is complete.
4732 Exim scans the addresses that are assigned to local and remote
4733 transports, and removes any duplicates. This means that more work will be
4734 done, as duplicates will always all be routed, but duplicates are
4735 presumably rare, so I don't expect this is of any significance.
4737 For deliveries to pipes, files, and autoreplies, the duplicate checking
4738 still happens during the routing process, since they are not going to be
4741 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4742 It corrects a timeout issue with spamd. This is Ian's comment: "The
4743 background is that sometimes spamd either never reads data from a
4744 connection it has accepted, or it never writes response data. The exiscan
4745 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4746 blindly assumes that writes won't block so it may never time out."
4748 PH/39 Allow G after quota size as well as K and M.
4750 PH/40 The value set for $authenticated_id in an authenticator may not contain
4751 binary zeroes or newlines because the value is written to log lines and
4752 to spool files. There was no check on this. Now the value is run through
4753 the string_printing() function so that such characters are converted to
4754 printable escape sequences.
4756 PH/41 $message_linecount is a new variable that contains the total number of
4757 lines in the message. Compare $body_linecount, which is the count for the
4760 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4761 bounce and delay warning messages, except in certain special cases, which
4764 (a) An SMTP error message from a remote host;
4765 (b) A message specified in a :fail: redirection;
4766 (c) A message specified in a "fail" command in a system filter;
4767 (d) A message specified in a FAIL return from the queryprogram router;
4768 (e) A message specified by the cannot_route_message router option.
4770 In these cases only, Exim does include the error details in bounce and
4771 warning messages. There are also a few cases where bland messages such
4772 as "unrouteable address" or "local delivery error" are given.
4774 PH/43 $value is now also set for the "else" part of a ${run expansion.
4776 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4777 being worked on, but at least Exim now implements the latest version to
4780 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4781 process to complete was treated as a delivery failure, a timeout while
4782 writing the message to the pipe was logged, but erroneously treated as a
4783 successful delivery. Such timeouts include transport filter timeouts. For
4784 consistency with the overall process timeout, these timeouts are now
4785 treated as errors, giving rise to delivery failures by default. However,
4786 there is now a new Boolean option for the pipe transport called
4787 timeout_defer, which, if set TRUE, converts the failures into defers for
4788 both kinds of timeout. A transport filter timeout is now identified in
4791 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4792 systems where "make" and "gmake" are different, calling "gmake" at top
4793 level broke things. I've arranged for the value of $(MAKE) to be passed
4794 from the Makefile to this script so that it can call the same version of
4798 A note about Exim versions 4.44 and 4.50
4799 ----------------------------------------
4801 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4802 changes of various kinds. As a consequence, a big documentation update was
4803 needed. This delayed the release for rather longer than seemed good, especially
4804 in the light of a couple of (minor) security issues. Therefore, the changes
4805 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4806 release. So 4.44 and 4.50 are in effect two different branches that both start
4809 I have left the 4.50 change log unchanged; it contains all the changes since
4810 4.43. The change log for 4.44 is below; many of its items are identical to
4811 those for 4.50. This seems to be the most sensible way to preserve the
4812 historical information.
4818 1. Minor wording change to the doc/README.SIEVE file.
4820 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4821 computation of the current number of files was incorrect.
4823 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4824 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4827 4. Give more explanation in the error message when the command for a transport
4828 filter fails to execute.
4830 5. There are several places where Exim runs a non-Exim command in a
4831 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4832 was being done only for the command run by the queryprogram router. It is
4833 now done for all such subprocesses. The other cases are: ${run, transport
4834 filters, and the commands run by the lmtp and pipe transports.
4836 6. Added CONFIGURE_GROUP build-time option.
4838 7. Some older OS have a limit of 256 on the maximum number of file
4839 descriptors. Exim was using setrlimit() to set 1000 as a large value
4840 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4841 systems. I've change it so that if it can't get 1000, it tries for 256.
4843 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4844 was an oversight, and furthermore, ever since the addition of extra
4845 controls (e.g. 4.43/32), the checks on when to allow different forms of
4846 "control" were broken. There should now be diagnostics for all cases when a
4847 control that does not make sense is encountered.
4849 9. Added the /retain_sender option to "control=submission".
4851 10. $recipients is now available in the predata ACL (oversight).
4853 11. Tidy the search cache before the fork to do a delivery from a message
4854 received from the command line. Otherwise the child will trigger a lookup
4855 failure and thereby defer the delivery if it tries to use (for example) a
4856 cached ldap connection that the parent has called unbind on.
4858 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4859 of $address_data from the recipient verification was clobbered by the
4860 sender verification.
4862 13. The value of address_data from a sender verification is now available in
4863 $sender_address_data in subsequent conditions in the ACL statement.
4865 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4867 15. Added a new option "connect=<time>" to callout options, to set a different
4870 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4871 was its contents. (It was OK if the option was not defined at all.)
4873 17. A "Completed" log line is now written for messages that are removed from
4874 the spool by the -Mrm option.
4876 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4877 information about exactly what failed.
4879 19. Added -dd to debug only the daemon process.
4881 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4882 handles timeouts, both on the server side and network timeouts. Renamed the
4883 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4885 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4886 It is now set to "smtps".
4888 22. $host_address is now set to the target address during the checking of
4889 ignore_target_hosts.
4891 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4892 being passed; this would have caused $sender_host_name to have been used if
4893 matching the list had actually called for a host name (not very likely,
4894 since this list is usually IP addresses). A host name is now passed as
4897 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4898 code that specifies a non-restarting handler (typically sigaction() in
4899 modern systems) in an attempt to fix a rare and obscure crash bug.
4901 25. Narrowed the window for a race in the daemon that could cause it to ignore
4902 SIGCHLD signals. This is not a major problem, because they are used only to
4903 wake it up if nothing else does.
4905 26. A malformed maildirsize file could cause Exim to calculate negative values
4906 for the mailbox size or file count. Odd effects could occur as a result.
4907 The maildirsize information is now recalculated if the size or filecount
4910 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4911 support for a long time. Removed HAVE_SYS_VFS_H.
4913 28. Installed the latest version of exipick from John Jetmore.
4915 29. In an address list, if the pattern was not a regular expression, an empty
4916 subject address (from a bounce message) matched only if the pattern was an
4917 empty string. Non-empty patterns were not even tested. This was the wrong
4918 because it is perfectly reasonable to use an empty address as part of a
4919 database query. An empty address is now tested by patterns that are
4920 lookups. However, all the other forms of pattern expect the subject to
4921 contain a local part and a domain, and therefore, for them, an empty
4922 address still always fails if the pattern is not itself empty.
4924 30. Exim went into a mad DNS loop when attempting to do a callout where the
4925 host was specified on an smtp transport, and looking it up yielded more
4926 than one IP address.
4928 31. Re-factored the code for checking spool and log partition space into a
4929 function that finds that data and another that does the check. The former
4930 is then used to implement four new variables: $spool_space, $log_space,
4931 $spool_inodes, and $log_inodes.
4933 32. The RFC2047 encoding function was originally intended for short strings
4934 such as real names; it was not keeping to the 75-character limit for
4935 encoded words that the RFC imposes. It now respects the limit, and
4936 generates multiple encoded words if necessary. To be on the safe side, I
4937 have increased the buffer size for the ${rfc2047: expansion operator from
4940 33. It is now permitted to omit both strings after an "if" condition; if the
4941 condition is true, the result is "true". As before, when the second string
4942 is omitted, a false condition yields an empty string. This makes it less
4943 cumbersome to write custom ACL and router conditions.
4945 34. Failure to deliver a bounce message always caused it to be frozen, even if
4946 there was an errors_to setting on the router. The errors_to setting is now
4949 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4950 canonical form (fully expanded) before being placed in
4951 $sender_host_address.
4953 36. The table in the code that translates DNS record types into text (T_A to
4954 "A" for instance) was missing entries for NS and CNAME. It is just possible
4955 that this could have caused confusion if both these types were looked up
4956 for the same domain, because the text type is used as part of Exim's
4957 per-process caching. But the chance of anyone hitting this buglet seems
4960 37. The dnsdb lookup has been extended in a number of ways.
4962 (1) There is a new type, "zns", which walks up the domain tree until it
4963 finds some nameserver records. It should be used with care.
4965 (2) There is a new type, "mxh", which is like "mx" except that it returns
4966 just the host names, not the priorities.
4968 (3) It is now possible to give a list of domains (or IP addresses) to be
4969 looked up. The behaviour when one of the lookups defers can be
4970 controlled by a keyword.
4972 (4) It is now possible to specify the separator character for use when
4973 multiple records are returned.
4975 38. The dnslists ACL condition has been extended: it is now possible to supply
4976 a list of IP addresses and/or domains to be looked up in a particular DNS
4979 39. Added log_selector=+queue_time_overall.
4981 40. When running the queue in the test harness, wait just a tad after forking a
4982 delivery process, to get repeatability of debugging output.
4984 41. Include certificate and key file names in error message when GnuTLS fails
4985 to set them up, because the GnuTLS error message doesn't include the name
4986 of the failing file when there is a problem reading it.
4988 42. Allow both -bf and -bF in the same test run.
4990 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4992 44. The "Exiscan patch" is now merged into the mainline Exim source.
4994 45. Sometimes the final signoff response after QUIT could fail to get
4995 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4996 < 0 before doing a fflush(). This bug looks as though it goes back to the
4997 introduction of TLS in release 3.20, but "sometimes" must have been rare
4998 because the tests only now provoked it.
5000 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5001 (this can affect the format of dates).
5003 47. exim_tidydb, when checking for the continued existence of a message for
5004 which it has found a message-specific retry record, was not finding
5005 messages that were in split spool directories. Consequently, it was
5006 deleting retry records that should have stayed in existence.
5008 48. Steve fixed some bugs in eximstats.
5010 49. The SPA authentication driver was not abandoning authentication and moving
5011 on to the next authenticator when an expansion was forced to fail,
5012 contradicting the general specification for all authenticators. Instead it
5013 was generating a temporary error. It now behaves as specified.
5015 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5016 (the order specifies the preference for clients). The order is now AES256,
5017 AES128, 3DES, ARCFOUR128.
5019 51. Small patch to Sieve code - explicitly set From: when generating an
5022 52. Exim crashed if a remote delivery caused a very long error message to be
5023 recorded - for instance if somebody sent an entire SpamAssassin report back
5024 as a large number of 550 error lines. This bug was coincidentally fixed by
5025 increasing the size of one of Exim's internal buffers (big_buffer) that
5026 happened as part of the Exiscan merge. However, to be on the safe side, I
5027 have made the code more robust (and fixed the comments that describe what
5030 53. Now that there can be additional text after "Completed" in log lines (if
5031 the queue_time_overall log selector is set), a one-byte patch to exigrep
5032 was needed to allow it to recognize "Completed" as not the last thing in
5035 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5036 patch that reportedly fixes this has been added. I am not expert enough to
5037 create a test for it. This is what the patch creator wrote:
5039 "I found a little strange behaviour of ldap code when working with
5040 Windows 2003 AD Domain, where users was placed in more than one
5041 Organization Units. When I tried to give exim partial DN, the exit code
5042 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5043 But simultaneously result of request was absolutely normal ldap result,
5044 so I produce this patch..."
5046 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5047 REFERENCE, so I have modified the code to exclude the patch when that macro
5050 55. Some experimental protocols are using DNS PTR records for new purposes. The
5051 keys for these records are domain names, not reversed IP addresses. The
5052 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5053 leaves it alone. Component reversal etc. now happens only for IP addresses.
5056 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5058 57. Double the size of the debug message buffer (to 2048) so that more of very
5059 long debug lines gets shown.
5061 58. The exicyclog utility now does better if the number of log files to keep
5062 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5064 59. Two changes related to the smtp_active_hostname option:
5066 (1) $smtp_active_hostname is now available as a variable.
5067 (2) The default for smtp_banner uses $smtp_active_hostname instead
5068 of $primary_hostname.
5070 60. The host_aton() function is supposed to be passed a string that is known
5071 to be a valid IP address. However, in the case of IPv6 addresses, it was
5072 not checking this. This is a hostage to fortune. Exim now panics and dies
5073 if the condition is not met. A case was found where this could be provoked
5074 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5075 components; fortuitously, this particular loophole had already been fixed
5076 by change 4.50/55 above.
5078 If there are any other similar loopholes, the new check in host_aton()
5079 itself should stop them being exploited. The report I received stated that
5080 data on the command line could provoke the exploit when Exim was running as
5081 exim, but did not say which command line option was involved. All I could
5082 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5083 running as the user.
5086 61. There was a buffer overflow vulnerability in the SPA authentication code
5087 (which came originally from the Samba project). I have added a test to the
5088 spa_base64_to_bits() function which I hope fixes it.
5091 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5092 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5094 63. The daemon start-up calls getloadavg() while still root for those OS that
5095 need the first call to be done as root, but it missed one case: when
5096 deliver_queue_load_max is set with deliver_drop_privilege. This is
5097 necessary for the benefit of the queue runner, because there is no re-exec
5098 when deliver_drop_privilege is set.
5100 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5101 This has been fixed.
5103 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5104 was in use, was not putting the data itself into the right store pool;
5105 consequently, it could be overwritten for a subsequent message in the same
5106 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5109 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5111 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5112 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5113 the function were treating the return as a boolean value, which happened to
5114 work because 0=false and not-0=true, but is not correct code.
5116 68. The host_aton() function was not handling scoped IPv6 addresses (those
5117 with, for example, "%eth0" on the end) correctly.
5119 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5120 negated items (that is, ~something) in unsigned ints. Some compilers
5121 apparently mutter when there is no cast.
5123 70. If an address verification called from an ACL failed, and did not produce a
5124 user-specific message (i.e. there was only a "system" message), nothing was
5125 put in $acl_verify_message. In this situation, it now puts the system
5128 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5129 session; change 4.31/43 added the unwanted input to the log line - except
5130 that it did not do this in the start of session case. It now does.
5132 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5133 This is wrong and can cause the other end to generate a synchronization
5134 error if it is another Exim or anything else that does the synchronization
5135 check. A QUIT command is no longer sent after a timeout.
5137 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5138 during host lookups.
5140 74. The defer_ok option of callout verification was not working if it was used
5141 when verifying addresses in header lines, that is, for this case:
5143 verify = header_sender/callout=defer_ok
5145 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5146 those file descriptors could be used for SMTP connections. If anything
5147 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5148 could be sent to the SMTP client, causing chaos. The daemon now opens
5149 stdin, stdout, and stderr to /dev/null when it puts itself into the
5152 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5153 log by default. The user can override this with suitable Perl magic.
5155 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5156 the log message when discard triggers, was not working for the DATA ACL or
5157 for the non-SMTP ACL.
5159 78. Error message wording change in sieve.c.
5161 79. If smtp_accept_max_per_host was set, the number of connections could be
5162 restricted to fewer than expected, because the daemon was trying to set up
5163 a new connection before checking whether the processes handling previous
5164 connections had finished. The check for completed processes is now done
5165 earlier. On busy systems, this bug wouldn't be noticed because something
5166 else would have woken the daemon, and it would have reaped the completed
5169 80. If a message was submitted locally by a user whose login name contained one
5170 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5171 It caused a spool format error. I have fixed the spool reading code. A
5172 related problem was that the "from" clause in the Received: line became
5173 illegal because of the space(s). It is now covered by ${quote_local_part.
5175 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5178 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5180 83. Patch from Sieve maintainer to fix unterminated string problem in
5181 "vacation" handling.
5183 84. Some minor changes to the Linux configuration files to help with other
5184 OS variants using glibc.
5186 85. One more patch for Sieve to update vacation handling to latest spec.
5189 ----------------------------------------------------
5190 See the note above about the 4.44 and 4.50 releases.
5191 ----------------------------------------------------
5197 1. Change 4.43/35 introduced a bug that caused file counts to be
5198 incorrectly computed when quota_filecount was set in an appendfile
5201 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5202 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5205 3. Give more explanation in the error message when the command for a transport
5206 filter fails to execute.
5208 4. There are several places where Exim runs a non-Exim command in a
5209 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5210 was being done only for the command run by the queryprogram router. It is
5211 now done for all such subprocesses. The other cases are: ${run, transport
5212 filters, and the commands run by the lmtp and pipe transports.
5214 5. Some older OS have a limit of 256 on the maximum number of file
5215 descriptors. Exim was using setrlimit() to set 1000 as a large value
5216 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5217 systems. I've change it so that if it can't get 1000, it tries for 256.
5219 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5220 was an oversight, and furthermore, ever since the addition of extra
5221 controls (e.g. 4.43/32), the checks on when to allow different forms of
5222 "control" were broken. There should now be diagnostics for all cases when a
5223 control that does not make sense is encountered.
5225 7. $recipients is now available in the predata ACL (oversight).
5227 8. Tidy the search cache before the fork to do a delivery from a message
5228 received from the command line. Otherwise the child will trigger a lookup
5229 failure and thereby defer the delivery if it tries to use (for example) a
5230 cached ldap connection that the parent has called unbind on.
5232 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5233 of $address_data from the recipient verification was clobbered by the
5234 sender verification.
5236 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5237 was its contents. (It was OK if the option was not defined at all.)
5239 11. A "Completed" log line is now written for messages that are removed from
5240 the spool by the -Mrm option.
5242 12. $host_address is now set to the target address during the checking of
5243 ignore_target_hosts.
5245 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5246 being passed; this would have caused $sender_host_name to have been used if
5247 matching the list had actually called for a host name (not very likely,
5248 since this list is usually IP addresses). A host name is now passed as
5251 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5252 code that specifies a non-restarting handler (typically sigaction() in
5253 modern systems) in an attempt to fix a rare and obscure crash bug.
5255 15. Narrowed the window for a race in the daemon that could cause it to ignore
5256 SIGCHLD signals. This is not a major problem, because they are used only to
5257 wake it up if nothing else does.
5259 16. A malformed maildirsize file could cause Exim to calculate negative values
5260 for the mailbox size or file count. Odd effects could occur as a result.
5261 The maildirsize information is now recalculated if the size or filecount
5264 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5265 support for a long time. Removed HAVE_SYS_VFS_H.
5267 18. Updated exipick to current release from John Jetmore.
5269 19. Allow an empty sender to be matched against a lookup in an address list.
5270 Previously the only cases considered were a regular expression, or an
5273 20. Exim went into a mad DNS lookup loop when doing a callout where the
5274 host was specified on the transport, if the DNS lookup yielded more than
5277 21. The RFC2047 encoding function was originally intended for short strings
5278 such as real names; it was not keeping to the 75-character limit for
5279 encoded words that the RFC imposes. It now respects the limit, and
5280 generates multiple encoded words if necessary. To be on the safe side, I
5281 have increased the buffer size for the ${rfc2047: expansion operator from
5284 22. Failure to deliver a bounce message always caused it to be frozen, even if
5285 there was an errors_to setting on the router. The errors_to setting is now
5288 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5289 canonical form (fully expanded) before being placed in
5290 $sender_host_address.
5292 24. Updated eximstats to version 1.33
5294 25. Include certificate and key file names in error message when GnuTLS fails
5295 to set them up, because the GnuTLS error message doesn't include the name
5296 of the failing file when there is a problem reading it.
5298 26. Expand error message when OpenSSL has problems setting up cert/key files.
5301 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5302 (this can affect the format of dates).
5304 28. exim_tidydb, when checking for the continued existence of a message for
5305 which it has found a message-specific retry record, was not finding
5306 messages that were in split spool directories. Consequently, it was
5307 deleting retry records that should have stayed in existence.
5309 29. eximstats updated to version 1.35
5310 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5311 1.35 - bugfix such that pie charts by volume are generated correctly
5313 30. The SPA authentication driver was not abandoning authentication and moving
5314 on to the next authenticator when an expansion was forced to fail,
5315 contradicting the general specification for all authenticators. Instead it
5316 was generating a temporary error. It now behaves as specified.
5318 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5319 (the order specifies the preference for clients). The order is now AES256,
5320 AES128, 3DES, ARCFOUR128.
5322 31. Small patch to Sieve code - explicitly set From: when generating an
5325 32. Exim crashed if a remote delivery caused a very long error message to be
5326 recorded - for instance if somebody sent an entire SpamAssassin report back
5327 as a large number of 550 error lines. This bug was coincidentally fixed by
5328 increasing the size of one of Exim's internal buffers (big_buffer) that
5329 happened as part of the Exiscan merge. However, to be on the safe side, I
5330 have made the code more robust (and fixed the comments that describe what
5333 33. Some experimental protocols are using DNS PTR records for new purposes. The
5334 keys for these records are domain names, not reversed IP addresses. The
5335 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5336 leaves it alone. Component reversal etc. now happens only for IP addresses.
5339 34. The host_aton() function is supposed to be passed a string that is known
5340 to be a valid IP address. However, in the case of IPv6 addresses, it was
5341 not checking this. This is a hostage to fortune. Exim now panics and dies
5342 if the condition is not met. A case was found where this could be provoked
5343 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5344 components; fortuitously, this particular loophole had already been fixed
5345 by change 4.50/55 or 4.44/33 above.
5347 If there are any other similar loopholes, the new check in host_aton()
5348 itself should stop them being exploited. The report I received stated that
5349 data on the command line could provoke the exploit when Exim was running as
5350 exim, but did not say which command line option was involved. All I could
5351 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5352 running as the user.
5355 35. There was a buffer overflow vulnerability in the SPA authentication code
5356 (which came originally from the Samba project). I have added a test to the
5357 spa_base64_to_bits() function which I hope fixes it.
5360 36. The daemon start-up calls getloadavg() while still root for those OS that
5361 need the first call to be done as root, but it missed one case: when
5362 deliver_queue_load_max is set with deliver_drop_privilege. This is
5363 necessary for the benefit of the queue runner, because there is no re-exec
5364 when deliver_drop_privilege is set.
5366 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5367 was in use, was not putting the data itself into the right store pool;
5368 consequently, it could be overwritten for a subsequent message in the same
5369 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5372 38. Sometimes the final signoff response after QUIT could fail to get
5373 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5374 < 0 before doing a fflush(). This bug looks as though it goes back to the
5375 introduction of TLS in release 3.20, but "sometimes" must have been rare
5376 because the tests only now provoked it.
5382 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5383 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5384 Now it returns an integer. A number of calls were still expecting a T/F
5385 return. Fortuitously, in all cases, the tests worked in OK situations,
5386 which is the norm. However, things would have gone wrong on any write
5387 failures on the smtp file descriptor. This function is used when sending
5388 messages over SMTP and also when doing verify callouts.
5390 2. When Exim is called to do synchronous delivery of a locally submitted
5391 message (the -odf or -odi options), it no longer closes stderr before doing
5394 3. Implemented the mua_wrapper option.
5396 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5398 5. Implemented the functions header_remove(), header_testname(),
5399 header_add_at_position(), and receive_remove_recipient(), and exported them
5402 6. If an ACL "warn" statement specified the addition of headers, Exim already
5403 inserted X-ACL-Warn: at the start if there was no header name. However, it
5404 was not making this test for the second and subsequent header lines if
5405 there were newlines in the string. This meant that an invalid header could
5406 be inserted if Exim was badly configured.
5408 7. Allow an ACL "warn" statement to add header lines at the start or after all
5409 the Received: headers, as well as at the end.
5411 8. Added the rcpt_4xx retry error code.
5413 9. Added postmaster_mailfrom=xxx to callout verification option.
5415 10. Added mailfrom=xxxx to the callout verification option, for verify=
5418 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5419 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5421 12. Inserted some casts to stop certain compilers warning when using pointer
5422 differences as field lengths or precisions in printf-type calls (mostly
5423 affecting debugging statements).
5425 13. Added optional readline() support for -be (dynamically loaded).
5427 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5428 same clock tick as a message's arrival, so that its received time was the
5429 same as the "first fail" time on the retry record, and that message
5430 remained on the queue past the ultimate address timeout, every queue runner
5431 would try a delivery (because it was past the ultimate address timeout) but
5432 after another failure, the ultimate address timeout, which should have then
5433 bounced the address, did not kick in. This was a "< instead of <=" error;
5434 in most cases the first failure would have been in the next clock tick
5435 after the received time, and all would be well.
5437 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5438 being recognized when the domain list was tested by the match_domain
5439 condition in an expansion string.
5441 16. Added the ${str2b64: operator.
5443 17. Exim was always calling setrlimit() to set a large limit for the number of
5444 processes, without checking whether the existing limit was already
5445 adequate. (It did check for the limit on file descriptors.) Furthermore,
5446 errors from getrlimit() and setrlimit() were being ignored. Now they are
5447 logged to the main and panic logs, but Exim does carry on, to try to do its
5448 job under whatever limits there are.
5450 18. Imported PCRE 5.0.
5452 19. Trivial typo in log message " temporarily refused connection" (the leading
5455 20. If the log selector return_path_on_delivery was set and an address was
5456 redirected to /dev/null, the delivery process crashed because it assumed
5457 that a return path would always be set for a "successful" delivery. In this
5458 case, the whole delivery is bypassed as an optimization, and therefore no
5461 21. Internal re-arrangement: the function for sending a challenge and reading
5462 a response while authentication was assuming a zero-terminated challenge
5463 string. It's now changed to take a pointer and a length, to allow for
5464 binary data in such strings.
5466 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5468 23. Exim was not respecting finduser_retries when seeking the login of the
5469 uid under which it was called; it was always trying 10 times. (The default
5470 setting of finduser_retries is zero.) Also, it was sleeping after the final
5471 failure, which is pointless.
5473 24. Implemented tls_on_connect_ports.
5475 25. Implemented acl_smtp_predata.
5477 26. If the domain in control=submission is set empty, Exim assumes that the
5478 authenticated id is a complete email address when it generates From: or
5479 Sender: header lines.
5481 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5482 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5483 chown and chgrp in /bin and hostname in /usr/bin.
5485 28. Exim was keeping the "process log" file open after each use, just as it
5486 does for the main log. This opens the possibility of it remaining open for
5487 long periods when the USR1 signal hits a daemon. Occasional processlog
5488 errors were reported, that could have been caused by this. Anyway, it seems
5489 much more sensible not to leave this file open at all, so that is what now
5492 29. The long-running daemon process does not normally write to the log once it
5493 has entered its main loop, and it closes the log before doing so. This is
5494 so that log files can straightforwardly be renamed and moved. However,
5495 there are a couple of unusual error situations where the daemon does write
5496 log entries, and I had neglected to close the log afterwards.
5498 30. The text of an SMTP error response that was received during a remote
5499 delivery was being truncated at 512 bytes. This is too short for some of
5500 the long messages that one sometimes sees. I've increased the limit to
5503 31. It is now possible to make retry rules that apply only when a message has a
5504 specific sender, in particular, an empty sender.
5506 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5507 it possible to be selective about when SMTP synchronization is enforced.
5509 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5511 32. Implemented hosts_connection_nolog.
5513 33. Added an ACL for QUIT.
5515 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5518 35. Added mailbox_size and mailbox_filecount to appendfile.
5520 36. Added control = no_multiline_responses to ACLs.
5522 37. There was a bug in the logic of the code that waits for the clock to tick
5523 in the case where the clock went backwards by a substantial amount such
5524 that the microsecond fraction of "now" was more than the microsecond
5525 fraction of "then" (but the whole seconds number was less).
5527 38. Added support for the libradius Radius client library this is found on
5528 FreeBSD (previously only the radiusclient library was supported).
5534 1. When certain lookups returned multiple values in the form name=value, the
5535 quoting of the values was not always being done properly. Specifically:
5536 (a) If the value started with a double quote, but contained no whitespace,
5538 (b) If the value contained whitespace other than a space character (i.e.
5539 tabs or newlines or carriage returns) it was not quoted.
5540 This fix has been applied to the mysql and pgsql lookups by writing a
5541 separate quoting function and calling it from the lookup code. The fix
5542 should probably also be applied to nisplus, ibase and oracle lookups, but
5543 since I cannot test any of those, I have not disturbed their existing code.
5545 2. A hit in the callout cache for a specific address caused a log line with no
5546 reason for rejecting RCPT. Now it says "Previous (cached) callout
5547 verification failure".
5549 3. There was an off-by-one bug in the queryprogram router. An over-long
5550 return line was truncated at 256 instead of 255 characters, thereby
5551 overflowing its buffer with the terminating zero. As well as fixing this, I
5552 have increased the buffer size to 1024 (and made a note to document this).
5554 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5555 when Exim is waiting for an SMTP response from a remote server, Exim
5556 restarts its select() call on the socket, thereby resetting its timeout.
5557 This is not a problem when such interrupts are rare. Somebody set up a cron
5558 job to run exiwhat every 2 minutes, which is less than the normal select()
5559 timeout (5 or 10 minutes). This meant that the select() timeout never
5560 kicked in because it was always reset. I have fixed this by comparing the
5561 time when an interrupt arrives with the time at the start of the first call
5562 to select(). If more time than the timeout has elapsed, the interrupt is
5563 treated as a timeout.
5565 5. Some internal re-factoring in preparation for the addition of Sieve
5566 extensions (by MH). In particular, the "personal" test is moved to a
5567 separate function, and given an option for scanning Cc: and Bcc: (which is
5568 not set for Exim filters).
5570 6. When Exim created an email address using the login of the caller as the
5571 local part (e.g. when creating a From: or Sender: header line), it was not
5572 quoting the local part when it contained special characters such as @.
5574 7. Installed new OpenBSD configuration files.
5576 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5577 try to make them clearer.
5579 9. Callout options, other than the timeout value, were being ignored when
5580 verifying sender addresses in header lines. For example, when using
5582 verify = header_sender/callout=no_cache
5584 the cache was (incorrectly) being used.
5586 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5587 only the Cygwin environment.
5589 11. When return_path_on_delivery was set as a log selector, if different remote
5590 addresses in the same message used different return paths and parallel
5591 remote delivery occurred, the wrong values would sometimes be logged.
5592 (Whenever a remote delivery process finished, the return path value from
5593 the most recently started remote delivery process was logged.)
5595 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5596 lines when AUTH and/or TLS are in use. This is the "received protocol"
5597 field. Exim used to use "asmtp" for authenticated SMTP, without any
5598 indication (in the protocol name) for TLS use. Now it follows the RFC and
5599 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5600 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5601 names appear in log lines as well as in Received: header lines.
5603 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5604 extensions, and comparison tests, and to fix some bugs.
5606 14. Changes to the "personal" filter test:
5608 (1) The test was buggy in that it was just doing the equivalent of
5609 "contains" tests on header lines. For example, if a user's address was
5610 anne@some.where, the "personal" test would incorrectly be true for
5612 To: susanne@some.where
5614 This test is now done by extracting each address from the header in turn,
5615 and checking the entire address. Other tests that are part of "personal"
5616 are now done using regular expressions (for example, to check local parts
5617 of addresses in From: header lines).
5619 (2) The list of non-personal local parts in From: addresses has been
5620 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5621 taken from the Sieve specification recommendations.
5623 (3) If the message contains any header line starting with "List-" it is
5624 treated as non-personal.
5626 (4) The test for "circular" in the Subject: header line has been removed
5627 because it now seems ill-conceived.
5629 15. Minor typos in src/EDITME comments corrected.
5631 16. Installed latest exipick from John Jetmore.
5633 17. If headers_add on a router specified a text string that was too long for
5634 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5635 of string_sprintf() is now avoided.
5637 18. $message_body_size was not set (it was always zero) when running the DATA
5638 ACL and the local_scan() function.
5640 19. For the "mail" command in an Exim filter, no default was being set for
5641 the once_repeat time, causing a random time value to be used if "once" was
5642 specified. (If the value happened to be <= 0, no repeat happened.) The
5643 default is now 0s, meaning "never repeat". The "vacation" command was OK
5644 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5645 (I found it when inspecting the code).
5647 20. There is now an overall timeout for performing a callout verification. It
5648 defaults to 4 times the callout timeout, which applies to individual SMTP
5649 commands during the callout. The overall timeout applies when there is more
5650 than one host that can be tried. The timeout is checked before trying the
5651 next host. This prevents very long delays if there are a large number of
5652 hosts and all are timing out (e.g. when the network connections are timing
5653 out). The value of the overall timeout can be changed by specifying an
5654 additional sub-option for "callout", called "maxwait". For example:
5656 verify = sender/callout=5s,maxwait=20s
5658 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5659 to the end before writing, but this should make it even safer).
5661 22. Exim was forgetting that it had advertised PIPELINING for the second and
5662 subsequent messages on an SMTP connection. It was also not resetting its
5663 memory on STARTTLS and an internal HELO.
5665 23. When Exim logs an SMTP synchronization error within a session, it now
5666 records whether PIPELINING has been advertised or not.
5668 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5669 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5670 rather than long int.
5672 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5674 26. Added the never_mail option to autoreply.
5680 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5681 crash if the getsockname() call failed; this can happen if a connection is
5682 closed very soon after it is established. The problem was simply in the
5683 order in which certain operations were done, causing Exim to try to write
5684 to the SMTP stream before it had set up the file descriptor. The bug has
5685 been fixed by making things happen in the correct order.
5691 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5692 before the connection was closed, thus losing the rejection response.
5694 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5695 some early Solaris releases, but causes trouble in current releases where
5696 socklen_t is defined.
5698 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5701 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5704 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5705 that releasing the top of it at the end releases what was used for sub-
5706 expansions (unless the block got too big). However, discard this block if
5707 the first thing is a variable or header, so that we can use its block when
5708 it is dynamic (useful for very large $message_headers, for example).
5710 6. Lookups now cache *every* query, not just the most recent. A new, separate
5711 store pool is used for this. It can be recovered when all lookup caches are
5712 flushed. Lookups now release memory at the end of their result strings.
5713 This has involved some general refactoring of the lookup sources.
5715 7. Some code has been added to the store_xxx() functions to reduce the amount
5716 of flapping under certain conditions.
5718 8. log_incoming_interface used to affect only the <= reception log lines. Now
5719 it causes the local interface and port to be added to several more SMTP log
5720 lines, for example "SMTP connection from", and rejection lines.
5722 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5724 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5726 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5727 could be overwritten at the end of the current message (or the start of a
5728 new message if it was set in a HELO ACL). The value is now preserved for
5729 the duration of the SMTP connection.
5731 12. If a transport had a headers_rewrite setting, and a matching header line
5732 contained an unqualified address, that address was qualified, even if it
5733 did not match any rewriting rules. The underlying bug was that the values
5734 of the flags that permit the existence of unqualified sender and recipient
5735 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5736 non-local messages, and by -bnq for local messages) were not being
5737 preserved with the message after it was received.
5739 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5740 "next input=" as part of the text comprising the host identity instead of
5741 the correct text. The code was using the same buffer for two different
5742 strings. However, depending on which order the printing function evaluated
5743 its arguments, the bug did not always show up. Under Linux, for example, my
5744 test suite worked just fine.
5746 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5747 doesn't work with some older versions of Perl. It has been changed to "my",
5748 which in any case is probably the better facility to use.
5750 15. A really picky compiler found some instances of statements for creating
5751 error messages that either had too many or two few arguments for the format
5754 16. The size of the buffer for calls to the DNS resolver has been increased
5755 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5756 for addresses that have a lot of PTR records. This alleviates a problem; it
5757 does not fully solve it.
5759 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5760 buffer now truncates the list and logs the incident, which is the same
5761 action as happens when Exim is looking up a host name and its aliases.
5762 Previously in this situation something unpredictable would happen;
5763 sometimes it was "internal error: store_reset failed".
5765 18. If a server dropped the connection unexpectedly when an Exim client was
5766 using GnuTLS and trying to read a response, the client delivery process
5767 crashed while trying to generate an error log message.
5769 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5770 string, for example:
5772 warn message = H1: something\nH2: something
5774 the text was added as a single header line from Exim's point of view
5775 though it ended up OK in the delivered message. However, searching for the
5776 second and subsequent header lines using $h_h2: did not work. This has been
5777 fixed. Similarly, if a system filter added multiple headers in this way,
5778 the routers could not see them.
5780 20. Expanded the error message when iplsearch is called with an invalid key to
5781 suggest using net-iplsearch in a host list.
5783 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5784 ACLs are no longer actually imposed (and a message to that effect is
5787 22. If a "gecos" field in a passwd entry contained escaped characters, in
5788 particular, if it contained a \" sequence, Exim got it wrong when building
5789 a From: or a Sender: header from that name. A second bug also caused
5790 incorrect handling when an unquoted " was present following a character
5791 that needed quoting.
5793 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5794 was not being matched caselessly.
5796 24. Arranged for all hyphens in the exim.8 source to be escaped with
5799 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5800 properly. Recipient callout cache records were still being keyed to include
5801 the sender, even when use_sender was set false. This led to far more
5802 callouts that were necessary. The sender is no longer included in the key
5803 when use_sender is false.
5805 26. Added "control = submission" modifier to ACLs.
5807 27. Added the ${base62d: operator to decode base 62 numbers.
5809 28. dnsdb lookups can now access SRV records.
5811 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5812 the configuration file.
5814 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5815 (-v) mode. This makes the output for a verbose queue run more intelligible.
5817 31. Added a use_postmaster feature to recipient callouts.
5819 32. Added the $body_zerocount variable, containing the number of binary zero
5820 bytes in the message body.
5822 33. The time of last modification of the "new" subdirectory is now used as the
5823 "mailbox time last read" when there is a quota error for a maildir
5826 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5828 35. Added +ignore_unknown as a special item in host lists.
5830 36. Code for decoding IPv6 addresses in host lists is now included, even if
5831 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5832 address was recognized as an IP address, but was then not correctly decoded
5833 into binary, causing unexpected and incorrect effects when compared with
5840 1. Very minor rewording of debugging text in manualroute to say "list of
5841 hosts" instead of "hostlist".
5843 2. If verify=header_syntax was set, and a header line with an unqualified
5844 address (no domain) and a large number of spaces between the end of the
5845 name and the colon was received, the reception process suffered a buffer
5846 overflow, and (when I tested it) crashed. This was caused by some obsolete
5847 code that should have been removed. The fix is to remove it!
5849 3. When running in the test harness, delay a bit after writing a bounce
5850 message to get a bit more predictability in the log output.
5852 4. Added a call to search_tidyup() just before forking a reception process. In
5853 theory, someone could use a lookup in the expansion of smtp_accept_max_
5854 per_host which, without the tidyup, could leave open a database connection.
5856 5. Added the variables $recipient_data and $sender_data which get set from a
5857 lookup success in an ACL "recipients" or "senders" condition, or a router
5858 "senders" option, similar to $domain_data and $local_part_data.
5860 6. Moved the writing of debug_print from before to after the "senders" test
5863 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5864 problems for message scanning, either using a data ACL, or using
5865 local_scan() because the Received: header was not generated till after they
5866 were called (in order to set the time as the time of reception completion).
5867 I have revised the way this works. The header is now generated after the
5868 body is received, but before the ACL or local_scan() are called. After they
5869 are run, the timestamp in the header is updated.
5875 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5876 before starting a queue runner without re-exec. This happened only when
5877 deliver_drop_privilege was set or when the Exim user was set to root. The
5878 effect of the bug was that timeouts during subsequent deliveries caused
5879 crashes instead of being properly handled. The handler is now left at its
5880 default (and expected) setting.
5882 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5883 message, again when deliver_drop_privilege is set or Exim is run as root.
5884 The bug described in (1) was not present in this case, but the tidying up
5885 of the other signals was missing. I have made the two cases consistent.
5887 3. The ignore_target_hosts setting on a manualroute router was being ignored
5888 for hosts that were looked up using the /MX notation.
5890 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5893 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5894 operated on the sender address. After changing the $sender_address to <>
5895 for the sender address verify, Exim was re-instated it as the original
5896 (before rewriting) address, but remembering that it had rewritten it, so it
5897 wasn't rewriting it again. This bug also had the effect of breaking the
5898 sender address verification caching when the sender address was rewritten.
5900 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5901 This has been changed so that if the ip literal address matches
5902 ignore_target_hosts, the router declines.
5904 7. Added expansion conditions match_domain, match_address, and match_local_
5905 part (NOT match_host).
5907 8. The placeholder for the Received: header didn't have a length field set.
5909 9. Added code to Exim itself and to exim_lock to test for a specific race
5910 condition that could lead to file corruption when using MBX delivery. The
5911 issue is with the lockfile that is created in /tmp. If this file is removed
5912 after a process has opened it but before that process has acquired a lock,
5913 there is the potential for a second process to recreate the file and also
5914 acquire a lock. This could lead to two Exim processes writing to the file
5915 at the same time. The added code performs the same test as UW imapd; it
5916 checks after acquiring the lock that its file descriptor still refers to
5917 the same named file.
5919 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5920 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5923 11. Added the smtp_active_hostname option. If used, this will typically be made
5924 to depend on the incoming interface address. Because $interface_address is
5925 not set up until the daemon has forked a reception process, error responses
5926 that can happen earlier (such as "too many connections") no longer contain
5929 12. If an expansion in a condition on a "warn" statement fails because a lookup
5930 defers, the "warn" statement is abandoned, and the next ACL statement is
5931 processed. Previously this caused the whole ACL to be aborted.
5933 13. Added the iplsearch lookup type.
5935 14. Added ident_timeout as a log selector.
5937 15. Added tls_certificate_verified as a log selector.
5939 16. Added a global option tls_require_ciphers (compare the smtp transport
5940 option of the same name). This controls incoming TLS connections.
5942 17. I finally figured out how to make tls_require_ciphers do a similar thing
5943 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5944 before starting the TLS session.
5946 18. Tabs are now shown as \t in -bP output.
5948 19. If the log selector return_path_on_delivery was set, Exim crashed when
5949 bouncing a message because it had too many Received: header lines.
5951 20. If two routers both had headers_remove settings, and the first one included
5952 a superfluous trailing colon, the final name in the first list and the
5953 first name in the second list were incorrectly joined into one item (with a
5954 colon in the middle).
5960 1. Added -C and -D options to the exinext utility, mainly to make it easier
5961 to include in the automated testing, but these could be helpful when
5962 multiple configurations are in use.
5964 2. The exinext utility was not formatting the output nicely when there was
5965 an alternate port involved in the retry record key, nor when there was a
5966 message id as well (for retries that were specific to a specific message
5967 and a specific host). It was also confused by IPv6 addresses, because of
5968 the additional colons they contain. I have fixed the IPv4 problem, and
5969 patched it up to do a reasonable job for IPv6.
5971 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5972 delivery, the log line now contains "pipelined" if PIPELINING was used.
5974 4. An SMTP transport process used to panic and die if the bind() call to set
5975 an explicit outgoing interface failed. This has been changed; it is now
5976 treated in the same way as a connect() failure.
5978 5. A reference to $sender_host_name in the part of a conditional expansion
5979 that was being skipped was still causing a DNS lookup. This no longer
5982 6. The def: expansion condition was not recognizing references to header lines
5983 that used bh_ and bheader_.
5985 7. Added the _cache feature to named lists.
5987 8. The code for checking quota_filecount in the appendfile transport was
5988 allowing one more file than it should have been.
5990 9. For compatibility with Sendmail, the command line option
5998 and sets the incoming protocol and host name (for trusted callers). The
5999 host name and its colon can be omitted when only the protocol is to be set.
6000 Note the Exim already has two private options, -pd and -ps, that refer to
6001 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6002 "s", but I don't think that's a major issue.
6004 10. A number of refactoring changes to the code, none of which should affect
6007 (a) The number of logging options was getting close to filling up the
6008 32-bit word that was used as a bit map. I have split them into two classes:
6009 those that are passed in the argument to log_write(), and those that are
6010 only ever tested independently outside of that function. These are now in
6011 separate 32-bit words, so there is plenty of room for expansion again.
6012 There is no change in the user interface or the logging behaviour.
6014 (b) When building, for example, log lines, the code previously used a
6015 macro that called string_cat() twice, in order to add two strings. This is
6016 not really sufficiently general. Furthermore, there was one instance where
6017 it was actually wrong because one of the argument was used twice, and in
6018 one call a function was used. (As it happened, calling the function twice
6019 did not affect the overall behaviour.) The macro has been replaced by a
6020 function that can join an arbitrary number of extra strings onto a growing
6023 (c) The code for expansion conditions now uses a table and a binary chop
6024 instead of a serial search (which was left over from when there were very
6025 few conditions). Also, it now recognizes conditions like "pam" even when
6026 the relevant support is not compiled in: a suitably worded error message is
6027 given if an attempt is made to use such a condition.
6029 11. Added ${time_interval:xxxxx}.
6031 12. A bug was causing one of the ddress fields not to be passed back correctly
6032 from remote delivery subprocesses. The field in question was not being
6033 subsequently used, so this caused to problems in practice.
6035 13. Added new log selectors queue_time and deliver_time.
6037 14. Might have fixed a bug in maildirsizefile handling that threw up
6038 "unexpected character" debug warnings, and recalculated the data
6039 unnecessarily. In any case, I expanded the warning message to give more
6042 15. Added the message "Restricted characters in address" to the statements in
6043 the default ACL that block characters like @ and % in local parts.
6045 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6046 Three changes have been made:
6048 (a) There was a serious bug; a negative response to MAIL caused the whole
6049 recipient domain to be cached as invalid, thereby blocking all messages
6050 to all local parts at the same domain, from all senders. This bug has
6051 been fixed. The domain is no longer cached after a negative response to
6052 MAIL if the sender used is not empty.
6054 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6057 (c) A new callout option, "use_sender" has been added for people who want
6058 the modified behaviour.
6064 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6067 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6068 indeed breaks things for older releases.
6070 3. Added additional logging to the case where there is a problem reading data
6071 from a filter that is running in a subprocess using a pipe, in order to
6072 try to track down a specific problem.
6074 4. Testing facility fudge: when running in the test harness and attempting
6075 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6076 getting "No route to host". Convert this to a timeout.
6078 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6081 6. Some OS don't have socklen_t but use size_t instead. This affects the
6082 fifth argument of getsockopt() amongst other things. This is now
6083 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6084 can be set for individual OS. I have set it for SunOS5, OSF1, and
6085 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6086 some earlier ones do not.
6088 7. Change 4.30/15 was not doing the test caselessly.
6090 8. The standard form for an IPv6 address literal was being rejected by address
6091 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6092 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6093 this, as well as the form without the "IPv6" on the front (but only when
6094 address literals are enabled, of course).
6096 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6098 10. Exim crashed if a message with an empty sender address specified by -f
6099 encountered a router with an errors_to setting. This could be provoked only
6100 by a command such as
6104 where an empty string was supplied; "<>" did not hit this bug.
6106 11. Installed PCRE release 4.5.
6108 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6109 remained set. It is now erased.
6111 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6112 times from message ids (which are base 36 rather than the normal 62).
6114 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6115 were being counted as actual protocol errors, and logged if the log
6116 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6117 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6118 and DATA following a set of rejected RCPTs do not count as protocol errors.
6119 In other words, Exim assumes they were pipelined, though this may not
6120 actually be the case. Of course, in all cases the client gets an
6121 appropriate error code.
6123 15. If a lookup fails in an ACL condition, a message about the failure may
6124 be available; it is used if testing the ACL cannot continue, because most
6125 such messages specify what the cause of the deferral is. However, some
6126 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6127 that caused an old message to be retained and used if a later statement
6128 caused a defer, replacing the real cause of the deferral.
6130 16. If an IP address had so many PTR records that the DNS lookup buffer
6131 was not large enough to hold them, Exim could crash while trying to process
6132 the truncated data. It now detects and logs this case.
6134 17. Further to 4.21/58, another change has been made: if (and only if) the
6135 first line of a message (the first header line) ends with CRLF, a bare LF
6136 in a subsequent header line has a space inserted after it, so as not to
6137 terminate the header.
6139 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6140 unnecessarily, used atoi() instead of strtol(), and didn't check the
6141 termination when getting file sizes from file names by regex.
6143 19. Completely re-implemented the support for maildirsize files, in the light
6144 of a number of problems with the previous contributed implementation
6145 (4.30/29). In particular:
6147 . If the quota is zero, the maildirsize file is maintained, but no quota is
6150 . If the maildir directory does not exist, it is created before any attempt
6151 to write a maildirsize file.
6153 . The quota value in the file is just a cache; if the quota is changed in
6154 the transport, the new value overrides.
6156 . A regular expression is available for excluding directories from the
6159 20. The autoreply transport checks the characters in options that define the
6160 message's headers; it allows continued headers, but it was checking with
6161 isspace() after an embedded newline instead of explicitly looking for a
6164 21. If all the "regular" hosts to which an address was routed had passed their
6165 expiry times, and had not reached their retry times, the address was
6166 bounced, even if fallback hosts were defined. Now Exim should go on to try
6169 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6170 equivalent code in the SMTP transport. Some hosts send humungous responses
6171 to HELO/EHLO, more than 1024 it seems.
6173 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6174 gives compiler warnings in some environments. I've now done it "properly",
6177 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6178 (because of problems with the built-in one) was declared to return uschar *
6179 instead of char *, causing compiler failure.
6181 25. Fixed a file descriptor leak when processing alias/forward files.
6183 26. Fixed a minor format string issue in dbfn.c.
6185 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6187 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6188 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6191 29. When a sender address is verified, it is cached, to save repeating the test
6192 when there is more than one recipient in a message. However, when the
6193 verification involves a callout, it is possible for different callout
6194 options to be set for different recipients. It is too complicated to keep
6195 track of this in the cache, so now Exim always runs a verification when a
6196 callout is required, relying on the callout cache for the optimization.
6197 The overhead is duplication of the address routing, but this should not be
6200 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6201 to be verified with callout=postmaster, and the main callout worked but the
6202 postmaster check failed, the verification correctly failed. However, if a
6203 subsequent RCPT command asked for sender verification *without* the
6204 postmaster check, incorrect caching caused this verification also to fail,
6207 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6208 it was not caching the DNS options (qualify_single, search_parents) that
6209 were used when the lookup failed. A subsequent lookup with different
6210 options therefore always gave the same answer, though there were cases
6211 where it should not have. (Example: a "domains = !$mx_any" option on a
6212 dnslookup router: the "domains" option is always processed without any
6213 widening, but the router might have qualify_single set.) Now Exim uses the
6214 cached value only when the same options are set.
6216 32. Added John Jetmore's "exipick" utility to the distribution.
6218 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6219 than a timeout (e.g. a certificate is required, and is not provided), an
6220 Exim server now closes the connection immediately. Previously it waited for
6221 the client to close - but if the client is SSL, it seems that they each
6222 wait for each other, leading to a delay before one of them times out.
6224 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6225 maintained 0.8.x compatibility because I don't think many are using it, and
6226 it is clearly obsolete.
6228 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6231 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6232 client certificate was expired. A simple patch fixes this, though I don't
6233 understand the full logic of why the verify callback is called multiple
6236 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6237 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6238 which causes problems with some clients (such as the Certicom SSL Plus
6239 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6240 disables the coutermeasure allowing Eudora to connect."
6242 38. Exim was not checking that a write() to a log file succeeded. This could
6243 lead to Bad Things if a log got too big, in particular if it hit a file
6244 size limit. Exim now panics and dies if it cannot write to a log file, just
6245 as it does if it cannot open a log file.
6247 39. Modified OS/Makefile-Linux so that it now contains
6249 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6251 The two -D definitions ensure that Exim is compiled with large file
6252 support, which makes it possible to handle log files that are bigger than
6255 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6256 instance) a domain was checked against a named list that involved a lookup,
6257 causing $domain_data to be set, then another domain was checked against the
6258 same list, then the first domain was re-checked, the value of $domain_data
6259 after the final check could be wrong. In particular, if the second check
6260 failed, it could be set empty. This bug probably also applied to
6263 41. The strip_trailing_dot option was not being applied to the address given
6264 with the -f command-line option.
6266 42. The code for reading a message's header from the spool was incrementing
6267 $received_count, but never initializing it. This meant that the value was
6268 incorrect (doubled) while delivering a message in the same process in which
6269 it was received. In the most common configuration of Exim, this never
6270 happens - a fresh exec is done - but it can happen when
6271 deliver_drop_privilege is set.
6273 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6274 it now includes up to 150 characters of the unexpected data in the log
6277 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6278 and building data strings. The size of both of these buffers was 10 000
6279 bytes - far larger than anybody would *ever* want, thought I. Needless to
6280 say, somebody hit the limit. I have increased the maximum line length to
6281 20 000 and the maximum data length of concatenated lines to 100 000. I have
6282 also fixed two bugs, because there was no checking on these buffers. Tsk,
6283 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6284 buffer is too small.
6286 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6287 lsearch lookups. Now it does.
6289 46. When parsing a route_list item in a manualroute router, a fixed-length
6290 buffer was used for the list of hosts. I made this 1024 bytes long,
6291 thinking that nobody would ever have a list of hosts that long. Wrong.
6292 Somebody had a whole pile of complicated expansion conditions, and the
6293 string was silently truncated, leading to an expansion error. It turns out
6294 that it is easier to change to an unlimited length (owing to other changes
6295 that have happened since this code was originally written) than to build
6296 structure for giving a limitation error. The length of the item that
6297 expands into the list of hosts is now unlimited.
6299 47. The lsearch lookup could not handle data where the length of text line was
6300 more than 4095 characters. Such lines were truncated, leading to shortened
6301 data being returned. It should now handle lines of any length.
6303 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6304 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6307 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6308 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6309 no longer happens in comment lines. A list of replacements is now placed
6310 at the head of all of the source files, except those whose only change is
6311 to replace PERL_COMMAND in the very first #! line.
6313 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6314 messages on the queue, with a bottom-up merge sort, using code contributed
6315 by Michael Haardt. This should make operations like -bp somewhat faster on
6316 large queues. It won't affect queue runners, except when queue_run_in_order
6319 51. Installed eximstats 1.31 in the distribution.
6321 52. Added support for SRV lookups to the dnslookup router.
6323 53. If an ACL referred to $message_body or $message_body_end, the value was not
6324 reset for any messages that followed in the same SMTP session.
6326 54. The store-handling optimization for building very long strings was not
6327 differentiating between the different store pools. I don't think this
6328 actually made any difference in practice, but I've tidied it.
6330 55. While running the routers to verify a sender address, $sender_address
6331 was still set to the sender address. This is wrong, because when routing to
6332 send a bounce to the sender, it would be empty. Therefore, I have changed
6333 it so that, while verifying a sender address, $sender_address is set to <>.
6334 (There is no change to what happens when verifying a recipient address.)
6336 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6337 target A or AAAA records (if not already returned) without resetting the
6338 qualify_single or search_parents options of the DNS resolver. These are
6339 inappropriate in this case because the targets of MX and SRV records must
6340 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6341 target that, when qualified, matched something in the local domain. These
6342 two options are now turned off when doing these lookups.
6344 57. It seems that at least some releases of Reiserfs (which does not have the
6345 concept of a fixed number of inodes) returns zero and not -1 for the
6346 number of available inodes. This interacted badly with check_spool_inodes,
6347 which assumed that -1 was the "no such thing" setting. What I have done is
6348 to check that the total number of inodes is greater than zero before doing
6349 the test of how many are available.
6351 58. When a "warn" ACL statement has a log_message modifier, the message is
6352 remembered, and not repeated. This is to avoid a lot of repetition when a
6353 message has many recipients that cause the same warning to be written.
6354 However, Exim was preserving the list of already written lines for an
6355 entire SMTP session, which doesn't seem right. The memory is now reset if a
6356 new message is started.
6358 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6359 debugging output unless log_rewrite was also set.
6361 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6362 of (int)(handle) when we know that handle contains (void *)(-1).
6364 61. The Exim daemon panic-logs an error return when it closes the incoming
6365 connection. However "connection reset by peer" seems to be common, and
6366 isn't really an error worthy of noting specially, so that particular error
6369 62. When Exim is trying to find all the local interfaces, it used to panic and
6370 die if the ioctl to get the interface flags failed. However, it seems that
6371 on at least one OS (Solaris 9) it is possible to have an interface that is
6372 included in the list of interfaces, but for which you get a failure error
6373 for this call. This happens when the interface is not "plumbed" into a
6374 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6375 failure of the "get flags" call assumes that the interface is down.
6377 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6378 makes life easier for people who are doing arithmetic on fields extracted
6379 from dates, where you often get leading zeros that should not be
6380 interpreted as octal.
6382 64. Added qualify_domain to the redirect router, to override the global
6385 65. If a pathologically long header line contained very many addresses (the
6386 report of this problem mentioned 10 000) and each of them was rewritten,
6387 Exim could use up a very large amount of memory. (It kept on making new
6388 copies of the header line as it rewrote, and never released the old ones.)
6389 At the expense of a bit more processing, the header rewriting function has
6390 been changed so that it no longer eats memory in this way.
6392 66. The generation of the Received: header has been moved from the time that a
6393 message starts to be received, to the time that it finishes. The timestamp
6394 in the Received: header should now be very close to that of the <= log
6395 line. There are two side-effects of this change:
6397 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6398 logged header lines no longer include the local Received: line, because
6399 it has not yet been created. The same applies to a copy of the message
6400 that is returned to a non-SMTP sender when a message is rejected.
6402 (b) When a filter file is tested using -bf, no additional Received: header
6403 is added to the test message. After some thought, I decided that this
6406 This change does not affect the value of $received_for. It is still set
6407 after address rewriting, but before local_scan() is called.
6409 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6411 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6412 gave an unhelpful panic error message, and a defer error. I have managed to
6413 change this behaviour so that it now rejects any supplied certificate,
6414 which seems right, as the list of acceptable certificates is empty.
6416 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6417 gave an unhelpful defer error. I have not managed to make this reject any
6418 supplied certificates, but the error message it gives is "no certificate
6419 supplied", which is not helpful.
6421 70. exigrep's output now also includes lines that are not associated with any
6422 message, but which match the given pattern. Implemented by a patch from
6423 Martin Sluka, which also tidied up the Perl a bit.
6425 71. Recipient callout verification, like sender verification, was using <> in
6426 the MAIL FROM command. This isn't really the right thing, since the actual
6427 sender may affect whether the remote host accepts the recipient or not. I
6428 have changed it to use the actual sender in the callout; this means that
6429 the cache record is now keyed on a recipient/sender pair, not just the
6430 recipient address. There doesn't seem to be a real danger of callout loops,
6431 since a callout by the remote host to check the sender would use <>.
6432 [SEE ABOVE: changed after hitting problems.]
6434 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6435 temporary errors. However, in the case of such a code being given after
6436 the end of a data transmission (i.e. after ".") Exim was failing to write
6437 a retry record for the message. (Yes, there was some broken host that was
6438 actually sending 8xx at this point.)
6440 73. An unknown lookup type in a host list could cause Exim to panic-die when
6441 the list was checked. (An example that provoked this was putting <; in the
6442 middle of a list instead of at the start.) If this happened during a DATA
6443 ACL check, a -D file could be left lying around. This kind of configuration
6444 error no longer causes Exim to die; instead it causes a defer error. The
6445 incident is still logged to the main and panic logs.
6447 74. Buglet left over from Exim 3 conversion. The message "too many messages
6448 in one connection" was written to the rejectlog but not the mainlog, except
6449 when address rewriting (yes!) was being logged.
6451 75. Added write_rejectlog option.
6453 76. When a system filter was run not as root (that is, when system_filter_user
6454 was set), the values of the $n variables were not being returned to the
6455 main process; thus, they were not subsequently available in the $sn
6458 77. Added +return_path_on_delivery log selector.
6460 78. A connection timeout was being treated differently from recipients deferred
6461 when testing hosts_max_try with a message that was older than the host's
6462 retry timeout. (The host should not be counted, thus allowing all hosts to
6463 be tried at least once before bouncing.) This may have been the cause of an
6464 occasionally reported bug whereby a message would remain on the queue
6465 longer than the retry timeout, but would be bounced if a delivery was
6466 forced. I say "may" because I never totally pinned down the problem;
6467 setting up timeout/retry tests is difficult. See also the next item.
6469 79. The ultimate address timeout was not being applied to errors that involved
6470 a combination of host plus message (for example, a timeout on a MAIL
6471 command). When an address resolved to a number of possible hosts, and they
6472 were not all tried for each delivery (e.g. because of hosts_max_try), a
6473 message could remain on the queue longer than the retry timeout.
6475 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6478 81. Fixed an obscure SMTP outgoing bug which required at least the following
6479 conditions: (a) there was another message waiting for the same server;
6480 (b) the server returned 5xx to all RCPT commands in the first message so
6481 that the message was not completed; (c) the server dropped the connection
6482 or gave a negative response to the RSET that Exim sends to abort the
6483 transaction. The observed case was a dropped connection after DATA that had
6484 been sent in pipelining mode. That is, the server had advertised PIPELINING
6485 but was not implementing it correctly. The effect of the bug was incorrect
6486 behaviour, such as trying another host, and this could lead to a crash.
6492 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6493 and daemon.c were passed as pointers to ints; they should have been
6494 pointers to socklen_t variables (which are typically unsigned ints).
6496 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6499 3. Fixed a really odd bug that affected only the testing scheme; patching a
6500 certain fixed string in the binary changed the value of another string that
6501 happened to be identical to the end of the original first string.
6503 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6504 name", it returns that address as the IP address. On some operating
6505 systems (e.g. Solaris), it also passes back the IP address string as the
6506 "host name". However, on others (e.g. Linux), it passes back an empty
6507 string. Exim wasn't checking for this, and was changing the host name to an
6508 empty string, assuming it had been canonicalized.
6510 5. Although rare, it is permitted to have more than one PTR record for a given
6511 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6512 all the names associated with an address, because they do in Solaris.
6513 However, it seems that they do not in Linux for data that comes from the
6514 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6515 I found this out when I moved to a new Linux workstation and tried to run
6516 the Exim test suite.
6518 To get round this problem I have changed the code so that it now does its
6519 own call to the DNS to look up PTR records when searching for a host name.
6520 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6521 addresses that are only in /etc/hosts are still found.
6523 This behaviour is, however, controlled by an option called host_lookup_
6524 order, which defaults to "bydns:byaddr". If people want to use the other
6525 order, or indeed, just use one or the other means of lookup, they can
6526 specify it in this variable.
6528 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6529 some operating systems, this comes back from gethostbyaddr() as an empty
6530 string, and this is what Exim used to test for. However, it seems that in
6531 other systems, "." is yielded. Exim now tests for this case too.
6533 7. The values of check_spool_space and check_log_space are now held internally
6534 as a number of kilobytes instead of an absolute number of bytes. If a
6535 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6536 kilobyte. This means that much larger values can be stored.
6538 8. Exim monitor: an attempt to get the action menu when not actually pointing
6539 at a message produces an empty menu entitled "No message selected". This
6540 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6541 no entries in it ("Shell widget menu has zero width and/or height"). So I
6542 have added a single, blank menu entry in this case.
6544 9. Added ${quote_local_part.
6546 10. MIME decoding is now applied to the contents of Subject: header lines when
6549 11. Now that a reference to $sender_host_address automatically causes a reverse
6550 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6551 host lookup before query-style lookups in lists that might use this
6552 variable. This has therefore been abolished, and the "net-" prefix is no
6553 longer necessary for query-style lookups.
6555 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6556 have been a typo for LFLAGS, so it has been changed.
6558 13. The install script calls Exim with "-C /dev/null" in order to find the
6559 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6560 to be output. However, since Exim outputs its version number before the
6561 error, it didn't break the script. It just looked ugly. I fixed this by
6562 always allowing "-C /dev/null" if the caller is root.
6564 14. Ignore overlarge ACL variable number when reading spool file - insurance
6565 against a later release with more variables having written the file.
6567 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6568 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6569 this, as well as the form without the "IPv6" on the front.
6571 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6572 OS/Makefile-Darwin file.
6574 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6575 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6577 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6578 variable. However, some OS use ints for inodes. I've added cast to long int
6579 to get rid of the compiler warning.
6581 19. I had forgotten to lock out "/../" in configuration file names when
6582 ALT_CONFIG_PREFIX was set.
6584 20. Routers used for verification do not need to specify transports. However,
6585 if such a router generated a host list, and callout was configured, Exim
6586 crashed, because it could not find a port number from the (non-existent)
6587 transport. It now assumes port 25 in this circumstance.
6589 21. Added the -t option to exigrep.
6591 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6592 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6593 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6594 them is set, LOOKUP_LSEARCH is forced.
6596 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6598 24. Added sender and host information to the "rejected by local_scan()" log
6599 line; previously there was no indication of these.
6601 25. Added .include_if_exists.
6603 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6604 Linux. It turns out that not all file systems support this. Apparently some
6605 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6606 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6607 not supported on the file descriptor, is now ignored when Exim is trying to
6608 sync a directory. This applies only to Linux.
6610 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6612 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6613 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6616 29. Added support for maildirsize files from supplied patch (modified a bit).
6618 30. The use of :fail: followed by an empty string could lead Exim to respond to
6619 sender verification failures with (e.g.):
6621 550 Verification failed for <xxx>
6622 550 Sender verify failed
6624 where the first response line was missing the '-' that indicates it is not
6625 the final line of the response.
6627 31. The loop for finding the name of the user that called Exim had a hardwired
6628 limit of 10; it now uses the value of finduser_retries, which is used for
6629 all other user lookups.
6631 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6634 33. Exim was neglecting to zero errno before one call of strtol() when
6635 expanding a string and expecting an integer value. On some systems this
6636 resulted in spurious "integer overflow" errors. Also, it was casting the
6637 result into an int without checking.
6639 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6640 did not work. The code looks as if it has *never* worked, though it appears
6641 to have been documented since at least release 1.62. I have made it work.
6643 35. The "timeout_DNS" error in retry rules, also documented since at least
6644 1.62, also never worked. As it isn't clear exactly what this means, and
6645 clearly it isn't a major issue, I have abolished the feature by treating it
6646 as "timeout", and writing a warning to the main and panic logs.
6648 36. The display of retry rules for -brt wasn't always showing the error code
6651 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6652 timeout_connect_A, timeout_connect_MX.
6654 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6655 to the empty sender.
6657 39. The daemon was not analysing the content of -oX till after it had closed
6658 stderr and disconnected from the controlling terminal. This meant that any
6659 syntax errors were only noted on the panic log, and the return code from
6660 the command was 0. By re-arranging the code a little, I've made the
6661 decoding happen first, so such errors now appear on stderr, and the return
6662 code is 1. However, the actual setting up of the sockets still happens in
6663 the disconnected process, so errors there are still only recorded on the
6666 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6667 connections (as happens on some IP stacks) was logged at start up time as
6668 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6669 it from "IPv6 and IPv4", which means that two separate sockets are being
6672 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6673 says whether AF_INET or AF_INET6 was passed as an argument.
6675 42. Exiwhat output was messed up when time zones were included in log
6678 43. Exiwhat now gives more information about the daemon's listening ports,
6679 and whether -tls-on-connect was used.
6681 44. The "port" option of the smtp transport is now expanded.
6683 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6684 silently ignored. Now an error message is written to the main and panic
6687 46. There's a new ACL modifier called "logwrite" which writes to a log file
6688 as soon as it is encountered.
6690 47. Added $local_user_uid and $local_user_gid at routing time.
6692 48. Exim crashed when trying to verify a sender address that was being
6695 49. Exim was recognizing only a space character after ".include". It now also
6696 recognizes a tab character.
6698 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6699 extracting the relevant information from the specification. The man page no
6700 longer contains scrambled data for the -d option, and I've added a section
6701 at the front about calling Exim under different names.
6703 51. Added "extra_headers" argument to the "mail" command in filter files.
6705 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6708 53. Installed eximstats 1.29.
6710 54. Added transport_filter_timeout as a generic transport option.
6712 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6713 Cc: header lines. This was required by RFC 822, but it not required by RFC
6716 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6717 incoming messages that did not have them. Now it does so only if the
6718 message originates locally, that is, if there is no associated remote host
6719 address. When Resent- header lines are present, this applies to the Resent-
6720 lines rather than the non-Resent- lines.
6722 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6723 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6725 58. Messages for configuration errors now include the name of the main
6726 configuration file - useful now that there may be more than one file in a
6727 list (.included file names were always shown).
6729 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6730 for those rare installations that do not start the daemon as root or run it
6731 setuid root. I've cut out the call to initgroups() if the daemon is not
6734 60. The Exim user and group can now be bound into the binary as text strings
6735 that are looked up at the start of Exim's processing.
6737 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6739 62. Added $mailstore_basename variable.
6741 63. Installed patch to sieve.c from Michael Haardt.
6743 64. When Exim failed to open the panic log after failing to open the main log,
6744 the original message it was trying to log was written to stderr and debug
6745 output, but if they were not available (the usual case in production), it
6746 was lost. Now it is written to syslog before the two lines that record the
6747 failures to open the logs.
6749 65. Users' Exim filters run in subprocesses under the user's uid. It is
6750 possible for a "deliver" command or an alias in a "personal" command to
6751 provoke an address rewrite. If logging of address rewriting is configured,
6752 this fails because the process is not running as root or exim. There may be
6753 a better way of dealing with this, but for the moment (because 4.30 needs
6754 to be released), I have disabled address rewrite logging when running a
6755 filter in a non-root, non-exim process.
6761 1. The buildconfig auxiliary program wasn't quoting the value set for
6762 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6763 not defined. This bug was masked in 4.22 by the effect that was fixed in
6766 2. Some messages that were rejected after a message id was allocated were
6767 shown as "incomplete" by exigrep. It no longer does this for messages that
6768 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6770 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6771 have allow_domain_literals set, the ID did not get logged in the <= line.
6772 Domain literals are now always recognized in Message-ID: header lines.
6774 4. The first argument for a ${extract expansion item is the key name or field
6775 number. Leading and trailing spaces in this item were not being ignored,
6776 causing some misleading effects.
6778 5. When deliver_drop_privilege was set, single queue runner processes started
6779 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6780 same command in the process it spins off) were not dropping privilege.
6782 6. When the daemon running as "exim" started a queue runner, it always
6783 re-executed Exim in the spun-off process. This is a waste of effort when
6784 deliver_drop_privilege is set. The new process now just calls the
6785 queue-runner function directly.
6791 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6794 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6795 ignored. Though the use of -oP was forcing the writing of a pid file, it
6796 was always written to the default place.
6798 3. If the message "no IP address found for host xxxx" is generated during
6799 incoming verification, it is now followed by identification of the incoming
6800 connection (so you can more easily find what provoked it).
6802 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6804 5. Added some features to "harden" Exim a bit more against certain attacks:
6806 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6807 be put in Local/Makefile. This is like the never_users runtime option,
6808 but it cannot be overridden. The default setting is "root".
6810 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6811 prefix string with which any file named in a -C command line option
6814 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6815 is retained for -C and -D only if the caller of Exim is root. Without
6816 it, the exim user may also use -C and -D and retain privilege.
6818 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6819 command line option is disabled.
6821 6. Macro names set by the -D option must start with an upper case letter, just
6822 like macro names defined in the configuration file.
6824 7. Added "dereference=" facility to LDAP.
6826 8. Two instances of the typo "uknown" in the source files are fixed.
6828 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6829 the Configure-Makefile script screwed up while processing it.
6831 10. Incorporated PCRE 4.4.
6833 11. The SMTP synchronization check was not operating right at the start of an
6834 SMTP session. For example, it could not catch a HELO sent before the client
6835 waited for the greeting. There is now a check for outstanding input at the
6836 point when the greeting is written. Because of the duplex, asynchronous
6837 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6838 way, but not yet received, when the check is performed.
6840 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6841 on TCP/IP sockets, because this apparently causes some broken clients to
6844 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6845 unchanged) from the Cygwin maintainer.
6847 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6848 was supported instead of testing for mbx. Effectively a typo.
6850 15. The spa authenticator server code was not checking that the input it
6851 received was valid base64.
6853 16. The debug output line for the "set" modifier in ACLs was not showing the
6854 name of the variable that was being set.
6856 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6858 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6859 lookup on its own. Something else was needed to trigger the lookup. For
6860 example, a match in host_lookup or the need for a host name in a host list.
6861 Now, if $sender_host_name is referenced and the host name has not yet been
6862 looked up, a lookup is performed. If the lookup fails, the variable remains
6863 empty, and $host_lookup_failed is set to "1".
6865 19. Added "eqi" as a case-independent comparison operator.
6867 20. The saslauthd authentication condition could segfault if neither service
6868 nor realm was specified.
6870 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6871 error message that was logged was misleading, and incoming SMTP
6872 connections were dropped. The message is now more accurate, and temporary
6873 errors are given to SMTP connections.
6875 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6876 (except RSET) with a 421 error, until QUIT is received. However, it was
6877 failing to send a response to QUIT.
6879 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6880 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6881 ACL is now run after the helo_try_verify_hosts code.
6883 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6884 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6885 case-independent, so other case variants are also recognized). Apparently
6886 some systems use these upper case variants.
6888 25. If more than two messages were waiting for the same host, and a transport
6889 filter was specified for the transport, Exim sent two messages over the
6890 same TCP/IP connection, and then failed with "socket operation on non-
6891 socket" when it tried to send the third.
6893 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6895 27. The extern definition of crypt16() in expand.c was not being excluded when
6896 the OS had its own crypt16() function.
6898 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6899 as a preferred synonym for return_size_limit, both as an option and as an
6902 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6904 30. Changed the default configuration ACL to relax the local part checking rule
6905 for addresses that are not in any local domains. For these addresses,
6906 slashes and pipe symbols are allowed within local parts, but the sequence
6907 /../ is explicitly forbidden.
6909 31. SPA server authentication was not clearing the challenge buffer before
6912 32. log_message in a "warn" ACL statement was writing to the reject log as
6913 well as to the main log, which contradicts the documentation and doesn't
6914 seem right (because no rejection is happening). So I have stopped it.
6916 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6917 However, I am unable to do any testing of this.
6919 34. Fixed an infelicity in the appendfile transport. When checking directories
6920 for a mailbox, to see if any needed to be created, it was accidentally
6921 using path names with one or more superfluous leading slashes; tracing
6922 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6924 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6925 contents are added to the log line that is written for every discarded
6926 recipient. (Previously a log_message setting was ignored.)
6928 36. The ${quote: operator now quotes the string if it is empty.
6930 37. The install script runs exim in order to find its version number. If for
6931 some reason other than non-existence or emptiness, which it checks, it
6932 could not run './exim', it was installing it with an empty version number,
6933 i.e. as "exim-". This error state is now caught, and the installation is
6936 38. An argument was missing from the function that creates an error message
6937 when Exim fails to connect to the socket for saslauthd authentication.
6938 This could cause Exim to crash, or give a corrupted message.
6940 39. Added isip, isip4, and isip6 to ${if conditions.
6942 40. The ACL variables $acl_xx are now saved with the message, and can be
6943 accessed later in routers, transports, and filters.
6945 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6946 strings in the file are not string-expanded.
6948 42. If a MAIL command specified a SIZE value that was too large to fit into an
6949 int variable, the check against message_size_limit failed. Such values are
6950 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6951 day this will have to be increased, but I don't think I want to be around
6952 when emails are that large.
6959 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6960 iconv() is not standard in FreeBSD.
6962 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6963 IPv6 enabled. The observed symptom was a segmentation fault on return from
6964 the function os_common_find_running_interfaces() in src/os.c.
6966 3. In the check_special_case() function in daemon.c I had used "errno" as an
6967 argument name, which causes warnings on some systems. This was basically a
6968 typo, since it was named "eno" in the comments!
6970 4. The code that waits for the clock to tick (at a resolution of some fraction
6971 of a second) so as to ensure message-id uniqueness was always waiting for
6972 at least one whole tick, when it could have waited for less. [This is
6973 almost certainly not relevant at current processor speeds, where it is
6974 unlikely to ever wait at all. But we try to future-proof.]
6976 5. The function that sleeps for a time interval that includes fractions of a
6977 second contained a race. It did not block SIGALRM between setting the
6978 timer, and suspending (a couple of lines later). If the interval was short
6979 and the sigsuspend() was delayed until after it had expired, the suspension
6980 never ended. On busy systems this could lead to processes getting stuck for
6983 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6984 process, before it forks any delivery processes. The open lookup caching
6985 mechanism meant that the open file or database connection was passed into
6986 the delivery process. The problem was that delivery processes always tidy
6987 up cached lookup data. This could cause a problem for the next delivery
6988 process started by the queue runner, because the external queue runner
6989 process does not know about the closure. So the next delivery process
6990 still has data in the lookup cache. In the case of a file lookup, there was
6991 no problem because closing a file descriptor in a subprocess doesn't affect
6992 the parent. However, if the lookup was caching a connection to a database,
6993 the connection was closed, and the second delivery process was likely to
6994 see errors such as "PGSQL: query failed: server closed the connection
6995 unexpectedly". The problem has been fixed by closing all cached lookups
6996 in a queue runner before running a delivery process.
6998 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6999 seem to have the "const" qualifier which it has on other OS. I've
7002 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7003 *of the same type* (client or server) with the same public name that an
7004 error should be diagnosed.
7006 9. When Exim looked up a host name for an IP address, but failed to find the
7007 original IP address when looking up the host name (a safety check), it
7008 output the message "<ip address> does not match any IP for NULL", which was
7009 confusing, to say the least. The bug was that the host name should have
7010 appeared instead of "NULL".
7012 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7013 user that is built into the binary, and the -C or -D options is used, root
7014 privilege is dropped before the configuration file is read. In addition,
7015 logging is switched to stderr instead of the normal log files. If the
7016 configuration then re-defines the Exim user, the unprivileged environment
7017 is probably not what is expected, so Exim logs a panic warning message (but
7020 However, if deliver_drop_privilege is set, the unprivileged state may well
7021 be exactly what is intended, so the warning has been cut out in that case,
7022 and Exim is allowed to try to write to its normal log files.
7028 1. smtp_return_error_details was not giving details for temporary sender
7029 or receiver verification errors.
7031 2. Diagnose a configuration error if two authenticators have the same public
7034 3. Exim used not to create the message log file for a message until the first
7035 delivery attempt. This could be confusing when incoming messages were held
7036 for policy or load reasons. The message log file is now created at the time
7037 the message is received, and an initial "Received" line is written to it.
7039 4. The automatically generated man page for command line options had a minor
7040 bug that caused no ill effects; however, a more serious problem was that
7041 the procedure for building the man page automatically didn't always
7042 operate. Consequently, release 4.20 contains an out-of-date version. This
7043 shouldn't happen again.
7045 5. When building Exim with embedded Perl support, the script that builds the
7046 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7047 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7049 6. The freeze_tell option was not being used for messages that were frozen on
7050 arrival, either by an ACL or by local_scan().
7052 7. Added the smtp_incomplete_transaction log selector.
7054 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7055 was accepting AUTH without a new EHLO.
7057 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7058 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7061 10. Logging of TCP/IP connections (when configured) now happens in the main
7062 daemon process instead of the child process, so that the TCP/IP connection
7063 count is more accurate (but it can never be perfect).
7065 11. The use of "drop" in a nested ACL was not being handled correctly in the
7066 outer ACL. Now, if condition failure induced by the nested "drop" causes
7067 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7068 or "require"), the connection is dropped.
7070 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7071 that yield "discard" can now be used with an "accept" or a "discard" verb,
7072 but an error is generated for any others (because I can't see a useful way
7073 to define what should happen).
7075 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7076 are now processed in the same way as lines in the Exim configuration file.
7077 In particular, continuation lines are supported.
7079 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7081 15. Added -ti meaning -t -i.
7083 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7084 domains, and warn by logging if others are found.
7086 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7087 returned from GIFCONF when Exim is trying to find the list of interfaces on
7088 a host. The code in os.c has been modified to copy each ifreq to an aligned
7089 structure in all cases.
7091 Also, in some cases, the returned ifreq's were being copied to a 'struct
7092 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7093 means the last couple of bytes of an IPv6 address could be chopped if the
7094 ifreq contained only a normal sockaddr (14 bytes storage).
7096 18. Named domain lists were not supported in the hosts_treat_as_local option.
7097 An entry such as +xxxx was not recognized, and was treated as a literal
7100 19. Ensure that header lines added by a DATA ACL are included in the reject log
7101 if the ACL subsequently rejects the message.
7103 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7104 MD5 (which is deprecated).
7106 21. When testing a filter file using -bf, Exim was writing a message when it
7107 took the sender from a "From " line in the message, but it was not doing so
7108 when it took $return_path from a Return-Path: header line. It now does.
7110 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7111 with a valid header line field name (a series of printing characters
7112 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7114 23. Changed "disc" in the source to "disk" to conform to the documentation and
7115 the book and for uniformity.
7117 24. Ignore Sendmail's -Ooption=value command line item.
7119 25. When execve() failed while trying to run a command in a pipe transport,
7120 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7121 could be confused with a return value of 69 from the command itself. This
7122 has been changed to 127, the value the shell returns if it is asked to run
7123 a non-existent command. The wording for the related log line suggests a
7124 non-existent command as the problem.
7126 26. If received_header_text expands to an empty string, do not add a Received:
7127 header line to the message. (Well, it adds a token one on the spool, but
7128 marks it "old" so that it doesn't get used or transmitted.)
7130 27. Installed eximstats 1.28 (addition of -nt option).
7132 28. There was no check for failure on the call to getsockname() in the daemon
7133 code. This can fail if there is a shortage of resources on the system, with
7134 ENOMEM, for example. A temporary error is now given on failure.
7136 29. Contrary to the C standard, it seems that in some environments, the
7137 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7138 program. Exim now does this explicitly; it affects the formatting of
7139 timestamps using strftime().
7141 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7142 complaints. I've now initialized all the variables, to avoid this.
7144 32. Header lines added by a system filter were not being "seen" during
7145 transport-time rewrites.
7147 33. The info_callback() function passed to OpenSSL is set up with type void
7148 (*)(SSL *, int, int), as described somewhere. However, when calling the
7149 function (actually a macro) that sets it up, the type void(*)() is
7150 expected. I've put in a cast to prevent warnings from picky compilers.
7152 34. If a DNS black list lookup found a CNAME record, but there were no A
7153 records associated with the domain it pointed at, Exim crashed.
7155 35. If a DNS black list lookup returned more than one A record, Exim ignored
7156 all but the first. It now scans all returned addresses if a particular IP
7157 value is being sought. In this situation, the contents of the
7158 $dnslist_value variable are a list of all the addresses, separated by a
7161 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7162 to accept a host name and all its aliases if the forward lookup for any of
7163 them yielded the IP address of the incoming connection. Now it accepts only
7164 those names whose forward lookup yields the correct IP address. Any other
7165 names are discarded. This closes a loophole whereby a rogue DNS
7166 administrator could create reverse DNS records to break through a
7167 wildcarded host restriction in an ACL.
7169 37. If a user filter or a system filter that ran in a subprocess used any of
7170 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7171 the wrong values were passed to the pipe command ($thisaddress had the
7172 value of $0, $0 had the value of $1, etc). This bug was introduced by
7173 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7175 38. Improved the line breaking for long SMTP error messages from ACLs.
7176 Previously, if there was no break point between 40 and 75 characters, Exim
7177 left the rest of the message alone. Two changes have been made: (a) I've
7178 reduced the minimum length to 35 characters; (b) if it can't find a break
7179 point between 35 and 75 characters, it looks ahead and uses the first one
7180 that it finds. This may give the occasional overlong line, but at least the
7181 remaining text gets split now.
7183 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7184 file descriptors might be low, and that setting 1000 would always raise it.
7185 It turns out that in some environments, the limit is already over 1000 and
7186 that lowering it causes trouble. So now Exim takes care not to decrease it.
7188 40. When delivering a message, the value of $return_path is set to $sender_
7189 address at the start of routing (routers may change the value). By an
7190 oversight, this default was not being set up when an address was tested by
7191 -bt or -bv, which affected the outcome if any router or filter referred to
7194 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7195 log only when "message" or "log_message" are set. However, if one of the
7196 conditions was an address verification, or a call to a nested ACL, the
7197 messages generated by the underlying test were being passed through. This
7198 no longer happens. The underlying message is available in $acl_verify_
7199 message for both "message" and "log_message" expansions, so it can be
7200 passed through if needed.
7202 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7203 new expansion $bh_ to give the encoded byte string without charset
7204 translation. Translation happens only if iconv() is available; HAVE_ICONV
7205 indicates this at build time. HEADERS_CHARSET gives the charset to
7206 translate to; headers_charset can change it in the configuration, and
7207 "headers charset" can change it in an individual filter file.
7209 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7210 that creates RFC 2047 encoded "words" labels them as that charset instead
7211 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7212 expansion operator; (ii) when Exim creates a From: line for a local
7213 message; (iii) when a header line is rewritten to include a "phrase" part.
7215 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7216 buggy, causing it to skip the first lines of messages whose message ID
7217 ended in 'D'. This would not have bitten before Exim release 4.14, because
7218 message IDs were unlikely to end in 'D' before then. The effect was to have
7219 incorrect size information for certain domains.
7221 45. #include "config.h" was missing at the start of the crypt16.c module. This
7222 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7225 46. If there was a timeout during a "random" callout check, Exim treated it as
7226 a failure of the random address, and carried on sending RSET and the real
7227 address. If the delay was just some slowness somewhere, the response to the
7228 original RCPT would be taken as a response to RSET and so on, causing
7229 mayhem of various kinds.
7231 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7232 when I implemented it. It didn't allow for the fact that some option values
7233 may legitimately be negative (e.g. size_addition), and it didn't even do
7234 the right test for positive values.
7236 48. Domain names in DNS records are case-independent. Exim always looks them up
7237 in lower case. Some resolvers return domain names in exactly the case they
7238 appear in the zone file, that is, they may contain uppercase letters. Not
7239 all resolvers do this - some return always lower case. Exim was treating a
7240 change of case by a resolver as a change of domain, similar to a widening
7241 of a domain abbreviation. This triggered its re-routing code and so it was
7242 trying to route what was effectively the same domain again. This normally
7243 caused routing to fail (because the router wouldn't handle the domain
7244 twice). Now Exim checks for this case specially, and just changes the
7245 casing of the domain that it ultimately uses when it transmits the message
7248 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7251 50. If a filter generated a file delivery with a non-absolute name (possible if
7252 no home directory exists for the router), the forbid_file option was not
7255 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7256 the existing equality matching.
7258 52. Exim was using ints instead of ino_t variables in some places where it was
7259 dealing with inode numbers.
7261 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7262 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7263 called TMPDIR, and if it finds it is different, it changes its value.
7265 54. The smtp_printf() function is now made available to local_scan() so
7266 additional output lines can be written before returning. There is also an
7267 smtp_fflush() function to enable the detection of a dropped connection.
7268 The variables smtp_input and smtp_batched_input are exported to
7271 55. Changed the default runtime configuration: the message "Unknown user"
7272 has been removed from the ACL, and instead placed on the localuser router,
7273 using the cannot_route_message feature. This means that any verification
7274 failures that generate their own messages won't get overridden. Similarly,
7275 the "Unrouteable address" message that was in the ACL for unverifiable
7276 relay addresses has also been removed.
7278 56. Added hosts_avoid_esmtp to the smtp transport.
7280 57. The exicyclog script was not checking for the esoteric option
7281 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7282 will work only if exicyclog is run under the appropriate euid.
7284 58. Following a discussion on the list, the rules by which Exim recognises line
7285 endings on incoming messages have been changed. The -dropcr and drop_cr
7286 options are now no-ops, retained only for backwards compatibility. The
7287 following line terminators are recognized: LF CRLF CR. However, special
7288 processing applies to CR:
7290 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7291 nor a local message in the state where . is a terminator.
7293 (ii) If a bare CR is encountered in a header line, an extra space is added
7294 after the line terminator so as not to end the header. The reasoning
7295 behind this is that bare CRs in header lines are most likely either
7296 to be mistakes, or people trying to play silly games.
7298 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7299 was being incorrectly given as 18 bytes larger than it should have been.
7300 This is a VOB (very old bug).
7302 60. This may never have affected anything current, but just in case it has:
7303 When the local host is found other than at the start of a list of hosts,
7304 the local host, those with the same MX, and any that follow, are discarded.
7305 When the list in question was part of a longer list of hosts, the following
7306 hosts (not currently being processed) were also being discarded. This no
7307 longer happens. I'm not sure if this situation could ever has previously
7310 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7313 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7314 header. This is something that is recommended in a new Internet Draft, and
7315 is something that is documented as being done by Sendmail. There are two
7316 possible values. For messages generated by the autoreply transport, Exim
7319 Auto-Submitted: auto-replied
7321 whereas for all other generated messages (e.g. bounces) it adds
7323 Auto-Submitted: auto-generated
7325 63. The "personal" condition in filters now includes a test for the
7326 Auto-Submitted: header. If it contains the string "auto-" the message it
7327 not considered personal.
7329 64. Added rcpt_include_affixes as a generic transport option.
7331 65. Added queue_only_override (default true).
7333 66. Added the syslog_duplication option.
7335 67. If what should have been the first header line of a message consisted of
7336 a space followed by a colon, Exim was mis-interpreting it as a header line.
7337 It isn't of course - it is syntactically invalid and should therefore be
7338 treated as the start of the message body. The misbehaviour could have
7339 caused a number of strange effects, including loss of data in subsequent
7340 header lines, and spool format errors.
7342 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7343 client host had authenticated. This control can now be exercised by an ACL
7344 for more flexibility.
7346 69. By default, callouts do not happen when testing with -bh. There is now a
7347 variant, -bhc, which does actually run the callout code, including
7348 consulting and updating the callout cache.
7350 70. Added support for saslauthd authentication, courtesy of Alexander
7353 71. If statvfs() failed on the spool or log directories while checking their
7354 size for availability, Exim confusingly gave the error "space shortage".
7355 Furthermore, in debugging mode it crashed with a floating point exception.
7356 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7357 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7358 serious problem, Exim now writes to the main and panic logs when this
7359 happens, with details of the failure. It then refuses to accept the
7360 incoming message, giving the message "spool directory problem" or "log
7361 directory problem" with a 421 code for SMTP messages.
7363 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7364 0, 1, and 2 exist, because some OS complain for execs without them (see
7365 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7366 descriptors. However, the code omitted to check that the open succeeded,
7367 causing mysterious errors if for some reason the permissions on /dev/null
7368 got screwed. Now Exim writes a message to the main and panic logs, and
7369 bombs out if it can't open /dev/null.
7371 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7372 interact so that it is all more flexible. It is supposed to remain
7373 backwards compatible. Also added extra_local_interfaces.
7375 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7376 to bomb out with an assertion failure - to the client this appears as a
7377 connection drop. This problem occurs in the part of the code that was taken
7378 from the Samba project. Fortunately, the assertion is in a very simple
7379 function, so I have fixed this by reproducing the function inline in the
7380 one place where it is called, and arranging for authentication to fail
7381 instead of killing the process with assert().
7383 75. The SPA client code was not working when the server requested OEM rather
7384 than Unicode encoding.
7386 76. Added code to make require_files with a specific uid setting more usable in
7387 the case where statting the file as root fails - usually a non-root-mounted
7388 NFS file system. When this happens and the failure is EACCES, Exim now
7389 forks a subprocess and does the per-uid checking as the relevant uid.
7391 77. Added process_log_path.
7393 78. If log_file_path was not explicitly set, a setting of check_log_space or
7394 check_log_inodes was ignored.
7396 79. If a space check for the spool or log partitions fails, the incident is now
7397 logged. Of course, in the latter case the data may get lost...
7399 80. Added the %p formatting code to string_format() so that it can be used to
7400 print addresses in debug_print(). Adjusted all the address printing in the
7401 debugging in store.c to use %p rather than %d.
7403 81. There was a concern that a line of code in smtp_in.c could overflow a
7404 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7405 initially expressed, the concern was not well-founded, because trailing
7406 spaces are removed early. However, if the trailing spaces were followed by
7407 a NULL, they did not get removed, so the overflow was possible. Two fixes
7410 (a) I re-wrote the offending code in a cleaner fashion.
7411 (b) If an incoming SMTP command contains a NULL character, it is rejected
7414 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7415 runs initgroups(), so that if the Exim user is in any additional groups,
7416 they will be used during message reception.
7422 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob