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.
63 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
64 verification result was not updated unless hosts_require_ocsp applied.
66 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
67 queue_list_requires_admin set to false, non-admin users were denied the
70 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
71 directory-of-certs mode. Previously they were advertised despite the
78 JH/01 Remove code calling the customisable local_scan function, unless a new
79 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
81 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
82 non-signal-safe functions being used.
84 JH/03 Bug 2269: When presented with a received message having a stupidly large
85 number of DKIM-Signature headers, disable DKIM verification to avoid
86 a resource-consumption attack. The limit is set at twenty.
88 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
89 report of oldest_pass in ${authres } in consequence, and separate out
90 some descriptions of reasons for verification fail.
92 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
93 files in the spool were present and unlocked. A queue-runner could spot
94 them, resulting in a duplicate delivery. Fix that by doing the unlock
95 after the unlink. Investigation by Tim Stewart. Take the opportunity to
96 add more error-checking on spoolfile handling while that code is being
99 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
100 No known attacks, no CVE, this is defensive hardening.
102 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
103 a queue-runner could start a delivery while other operations were ongoing.
104 Cutthrough delivery was a common victim, resulting in duplicate delivery.
105 Found and investigated by Tim Stewart. Fix by using the open message data
106 file handle rather than opening another, and not locally closing it (which
107 releases a lock) for that case, while creating the temporary .eml format
108 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
110 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
111 $sender_verify_failure/$recipient_verify_failure to "random".
113 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
116 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
117 Previously this would segfault.
119 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
122 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
123 like zero, since the resolver should be doing this for us, But we need one
124 as a CNAME but no MX presence gets the CNAME returned; we need to check
125 that doesn't point to an MX to declare it "no MX returned" rather than
126 "error, loop". A new main option is added so the older capability of
127 following some limited number of chain links is maintained.
129 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
131 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
132 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
133 now-deprecated earlier definitions used only specified the range up to TLS
134 1.2 (in the older-version library docs).
136 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
138 JH/15 Rework TLS client-side context management. Stop using a global, and
139 explicitly pass a context around. This enables future use of TLS for
140 connections to service-daemons (eg. malware scanning) while a client smtp
141 connection is using TLS; with cutthrough connections this is quite likely.
143 JH/16 Fix ARC verification to do AS checks in reverse order.
145 JH/17 Support a "tls" option on the ${readsocket } expansion item.
147 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
148 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
149 Previously the "utf8" would be re-prepended for every additional message.
151 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
152 Previously thery were accepted, resulting in issues when attempting to
153 forward messages to a non-supporting MTA.
155 PP/02 Let -n work with printing macros too, not just options.
157 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
158 one parent address was copied, and bogus data was used at delivery-logging
159 time. Either a crash (after delivery) or bogus log data could result.
160 Discovery and analysis by Tim Stewart.
162 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
163 Previously if the string ended mid-character, we did not insert the
164 promised '?' replacement.
166 PP/04 Documentation: current string operators work on bytes, not codepoints.
168 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
169 should pack well giving a smaller memory footprint so better caching and
170 therefore performance. Group the declarations where this can't be done so
171 that the byte-sized flag variables are not interspersed among pointer
172 variables, giving a better chance of good packing by the compiler.
174 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
175 non-null, to avoid issues with sites running BATV. Previously reports were
176 sent with an empty envelope sender so looked like bounces.
178 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
179 The ignore_error flag wasn't being returned from the filter subprocess so
180 was not set for later routers. Investigation and fix by Matthias Kurz.
182 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
183 and a msg:complete for the whole, when a message is manually removed using
184 -Mrm. Developement by Matthias Kurz, hacked on by JH.
186 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
187 a "Gnu special" function, asprintf() in the DB utility binary builds; I
188 hope that is portable enough.
190 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
191 requiring a known-CA anchor certificate; make it now rely entirely on the
192 TLSA as an anchor. Checking the name on the leaf cert against the name
193 on the A-record for the host is still done for TA (but not for EE mode).
195 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
196 included in delivery lines for non-proxied connections, when compiled with
197 SUPPORT_SOCKS and running with proxy logging enabled.
199 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
200 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
201 move the existing event to fire before the normal logging of message
202 failure so that custom logging is bracketed by normal logging.
204 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
205 msg:fail:internal event. Developement by Matthias Kurz.
207 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
208 far too small for todays use of crypto signatures stored there. Go all
209 the way to the max DNS message size of 64kB, even though this might be
210 overmuch for IOT constrained device use.
212 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
213 copy a string over itself. The library routine is documented as not
214 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
216 JH/32 For main options check_spool_space and check_inode_space, where the
217 platform supports 64b integers, support more than the previous 2^31 kB
218 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
219 the previous G, M, k.
221 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
222 $authenticated_fail_id variable on authentication failure. Previously
225 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
226 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
227 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
228 GNUTLS_SEC_PARAM_MEDIUM.
230 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
231 side. Previously we would continue as if no SNI had been received.
233 JH/36 Harden the handling of string-lists. When a list consisted of a sole
234 "<" character, which should be a list-separator specification, we walked
235 off past the nul-terimation.
237 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
238 causes) even when the retry time is not yet met. Previously they were
239 not, meaning that when (say) an account was over-quota and temp-rejecting,
240 and multiple senders' messages were queued, only one sender would get
241 notified on each configured delay_warning cycle.
243 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
245 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
246 cipher-suites, an error can be left on the stack even for a succeeding
247 accept; this results in impossible error messages when a later operation
250 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
251 return error codes indicating retry. Under TLS1.3 this becomes required.
253 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
254 it only wrote the new authenticators, resulting in a lack of tracking of
255 peer changes of ESMTP extensions until the next cache flush.
257 JH/41 Fix the loop reading a message header line to check for integer overflow,
258 and more-often against header_maxsize. Previously a crafted message could
259 induce a crash of the recive process; now the message is cleanly rejected.
261 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
262 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
268 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
269 When redis_servers is set to a list of > 1 element, and the Redis servers
270 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
271 case of MOVED into a DEFER case instead, thus moving the query onto the
272 next server in the list. For a cluster of N elements, all N servers must
273 be defined in redis_servers.
275 GF/02 Catch and remove uninitialized value warning in exiqsumm
276 Check for existence of @ARGV before looking at $ARGV[0]
278 JH/01 Replace the store_release() internal interface with store_newblock(),
279 which internalises the check required to safely use the old one, plus
280 the allocate and data copy operations duplicated in both (!) of the
281 extant use locations.
283 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
284 modifier. This matches the restriction on the commandline.
286 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
287 Previously only the last row was returned.
289 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
290 we assumed that tags in the header were well-formed, and parsed the
291 element content after inspecting only the first char of the tag.
292 Assumptions at that stage could crash the receive process on malformed
295 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
296 While running the DKIM ACL we operate on the Permanent memory pool so that
297 variables created with "set" persist to the DATA ACL. Also (at any time)
298 DNS lookups that fail create cache records using the Permanent pool. But
299 expansions release any allocations made on the current pool - so a dnsdb
300 lookup expansion done in the DKIM ACL releases the memory used for the
301 DNS negative-cache, and bad things result. Solution is to switch to the
302 Main pool for expansions.
303 While we're in that code, add checks on the DNS cache during store_reset,
304 active in the testsuite.
305 Problem spotted, and debugging aided, by Wolfgang Breyha.
307 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
308 When none of the hosts presented to a transport match an already-open
309 connection, close it and proceed with the list. Previously we would
310 queue the message. Spotted by Lena with Yahoo, probably involving
313 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
314 Previously a spurious "250 OK id=" response was appended to the proper
317 JH/08 The "support for" informational output now, which built with Content
318 Scanning support, has a line for the malware scanner interfaces compiled
319 in. Interface can be individually included or not at build time.
321 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
322 by the template makefile "src/EDITME". The "STREAM" support for an older
323 ClamAV interface method is removed.
325 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
326 rows affected is given instead).
328 JH/11 The runtime Berkeley DB library version is now additionally output by
329 "exim -d -bV". Previously only the compile-time version was shown.
331 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
332 SMTP connection. Previously, when one had more receipients than the
333 first, an abortive onward connection was made. Move to full support for
334 multiple onward connections in sequence, handling cutthrough connection
335 for all multi-message initiating connections.
337 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
338 routers. Previously, a multi-recipient message would fail to match the
339 onward-connection opened for the first recipient, and cause its closure.
341 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
342 a timeout on read on a GnuTLS initiating connection, resulting in the
343 initiating connection being dropped. This mattered most when the callout
344 was marked defer_ok. Fix to keep the two timeout-detection methods
347 JH/15 Relax results from ACL control request to enable cutthrough, in
348 unsupported situations, from error to silently (except under debug)
349 ignoring. This covers use with PRDR, frozen messages, queue-only and
352 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
354 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
355 metadata, resulting in a crash in free().
357 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
358 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
359 Broken also in d185889f4, with init system revamp.
361 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
362 Previously we abruptly closed the connection after reading a malware-
363 found indication; now we go on to read the "scan ok" response line,
366 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
367 ACL. Previously, a crash would result.
369 JH/19 Speed up macro lookups during configuration file read, by skipping non-
370 macro text after a replacement (previously it was only once per line) and
371 by skipping builtin macros when searching for an uppercase lead character.
373 JH/20 DANE support moved from Experimental to mainline. The Makefile control
374 for the build is renamed.
376 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
377 was allocated for every new TLS startup, meaning one per message. Fix
378 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
380 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
381 reported the original. Fix to report (as far as possible) the ACL
382 result replacing the original.
384 JH/23 Fix memory leak during multi-message connections using STARTTLS under
385 OpenSSL. Certificate information is loaded for every new TLS startup,
386 and the resources needed to be freed.
388 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
390 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
393 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
394 DATA response info to the (existing) per-recipient response info for
395 the "C=" log element. It can have useful tracking info from the
396 destination system. Patch from Simon Arlott.
398 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
399 length value. Previously this would segfault.
401 HS/02 Support Avast multiline protoocol, this allows passing flags to
402 newer versions of the scanner.
404 JH/28 Ensure that variables possibly set during message acceptance are marked
405 dead before release of memory in the daemon loop. This stops complaints
406 about them when the debug_store option is enabled. Discovered specifically
407 for sender_rate_period, but applies to a whole set of variables.
408 Do the same for the queue-runner and queue-list loops, for variables set
409 from spool message files. Do the same for the SMTP per-message loop, for
410 certain variables indirectly set in ACL operations.
412 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
413 as a multi-recipient message from a mailinglist manager). The coding had
414 an arbitrary cutoff number of characters while checking for more input;
415 enforced by writing a NUL into the buffer. This corrupted long / fast
416 input. The problem was exposed more widely when more pipelineing of SMTP
417 responses was introduced, and one Exim system was feeding another.
418 The symptom is log complaints of SMTP syntax error (NUL chars) on the
419 receiving system, and refused recipients seen by the sending system
420 (propating to people being dropped from mailing lists).
421 Discovered and pinpointed by David Carter.
423 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
424 replaced by the ${authresults } expansion.
426 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
428 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
429 allows proper process termination in container environments.
431 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
432 Previously the "final dot" had a newline after it; ensure it is CR,LF.
434 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
435 and "err_perm", deprecated since 4.83 when the RFC-defined words
436 "temperror" and "permerror" were introduced.
438 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
439 transport-filters or DKIM-signing. The restriction was lost in the
440 consolidation of verify-callout and delivery SMTP handling.
441 Extend the restriction to also cover ARC-signing.
443 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
444 in defer=pass mode supply a 450 to the initiator. Previously the message
447 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
448 tls_require_ciphers is used as before.
450 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
451 "pass_unscanned". Only tmpfails from the scanner are written to
452 the paniclog, as they may require admin intervention (permission
453 denied, license issues). Other scanner errors (like decompression
454 bombs) do not cause a paniclog entry.
456 JH/36 Fix reinitialisation of DKIM logging variable between messages.
457 Previously it was possible to log spurious information in receive log
460 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
461 triggered odd behaviour from Outlook Express clients.
463 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
466 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
467 since the IETF WG has not yet settled on that versus the original
468 "bare" representation.
470 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
471 Previously the millisecond value corrupted the output.
472 Fix also for syslog_pid=no and log_selector +pid, for which the pid
473 corrupted the output.
479 JH/01 Rework error string handling in TLS interface so that the caller in
480 more cases is responsible for logging. This permits library-sourced
481 string to be attached to addresses during delivery, and collapses
482 pairs of long lines into single ones.
484 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
485 during configuration. Wildcards are allowed and expanded.
487 JH/02 Rework error string handling in DKIM to pass more info back to callers.
488 This permits better logging.
490 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
491 do not close it down and have the child transport start it up again on
492 the passed-on TCP connection. Instead, proxy the child (and any
493 subsequent ones) for TLS via a unix-domain socket channel. Logging is
494 affected: the continued delivery log lines do not have any DNSSEC, TLS
495 Certificate or OCSP information. TLS cipher information is still logged.
497 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
498 identical IP addresses on different listening ports. Will also affect
501 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
502 add noisy ifdef guards to special-case this sillyness.
503 Patch from Bernd Kuhls.
505 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
506 than 255 are no longer allowed.
508 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
509 Disable the session-cache too, which might reduce our load. Since we
510 currrectly use a new context for every connection, both as server and
511 client, there is no benefit for these.
512 GnuTLS appears to not support tickets server-side by default (we don't
513 call gnutls_session_ticket_enable_server()) but client side is enabled
514 by default on recent versions (3.1.3 +) unless the PFS priority string
517 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
518 <https://reproducible-builds.org/specs/source-date-epoch/>.
520 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
521 the check for any unsuccessful recipients did not notice the limit, and
522 erroneously found still-pending ones.
524 JH/08 Pipeline CHUNKING command and data together, on kernels that support
525 MSG_MORE. Only in-clear (not on TLS connections).
527 JH/09 Avoid using a temporary file during transport using dkim. Unless a
528 transport-filter is involved we can buffer the headers in memory for
529 creating the signature, and read the spool data file once for the
530 signature and again for transmission.
532 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
533 4.77 as the kernel support then wasn't solid, having issues in 64bit
534 mode. Now, it's been long enough. Add support for FreeBSD also.
536 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
537 case where the routing stage had gathered several addresses to send to
538 a host before calling the transport for the first, we previously failed
539 to close down TLS in the old transport process before passing the TCP
540 connection to the new process. The new one sent a STARTTLS command
541 which naturally failed, giving a failed delivery and bloating the retry
542 database. Investigation and fix prototype from Wolfgang Breyha.
544 JH/12 Fix check on SMTP command input synchronisation. Previously there were
545 false-negatives in the check that the sender had not preempted a response
546 or prompt from Exim (running as a server), due to that code's lack of
547 awareness of the SMTP input buffering.
549 PP/04 Add commandline_checks_require_admin option.
550 Exim drops privileges sanely, various checks such as -be aren't a
551 security problem, as long as you trust local users with access to their
552 own account. When invoked by services which pass untrusted data to
553 Exim, this might be an issue. Set this option in main configuration
554 AND make fixes to the calling application, such as using `--` to stop
557 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
558 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
559 responses to those, into a single TLS record each way (this usually means
560 a single packet). As a side issue, smtp_enforce_sync now works on TLS
563 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
564 affects you only if you're dancing at the edge of the param size limits.
565 If you are, and this message makes sense to you, then: raise the
566 configured limit or use OpenSSL 1.1. Nothing we can do for older
569 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
570 cmdline element to get the documented default one. Previously it was
573 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
574 are unsuable for non-message-specific reasons - eg. connection timeout,
575 banner-time rejection.
577 JH/16 Fix logging of delivery remote port, when specified by router, under
580 PP/06 Repair manualroute's ability to take options in any order, even if one
581 is the name of a transport.
584 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
586 JH/17 Change the list-building routines interface to use the expanding-string
587 triplet model, for better allocation and copying behaviour.
589 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
590 Previously it was constructed the first time a possibly-matching string
591 was met in the configuration file input during startup; now it is done
594 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
595 compatible one, to avoid the (poorly documented) possibility of a config
596 file in the working directory redirecting the DB files, possibly correpting
597 some existing file. CVE-2017-10140 assigned for BDB.
599 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
600 cache-hot. Previously, although the result was properly cached, the
601 initial verify call returned a defer.
603 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
604 the main verify for receipient in uncached-mode.
606 JH/22 Retire historical build files to an "unsupported" subdir. These are
607 defined as "ones for which we have no current evidence of testing".
609 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
610 if present. Previously it was ignored.
612 JH/24 Start using specified-initialisers in C structure init coding. This is
613 a C99 feature (it's 2017, so now considered safe).
615 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
616 if was a fixed-sized field and bitmask ops via macros; it is now more
619 PP/07 GitHub PR 56: Apply MariaDB build fix.
620 Patch provided by Jaroslav Škarvada.
622 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
623 during Coverity cleanups [4.87 JH/47]
624 Diagnosis and fix provided by Michael Fischer v. Mollard.
626 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
627 the right size to place the terminating semicolon on its own folded
628 line, the header hash was calculated to an incorrect value thanks to
629 the (relaxed) space the fold became.
631 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
632 and confused the parent.
634 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
635 which could crash as a result. This could lead to undeliverable messages.
637 JH/28 Logging: "next input sent too soon" now shows where input was truncated
640 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
641 matters on fast-turnover and PID-randomising systems, which were getting
642 out-of-order delivery.
644 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
645 a possibly-overlapping copy. The symptom was that "Remote host closed
646 connection in response to HELO" was logged instead of the actual 4xx
649 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
650 Previously only that bufferd was discarded, resulting in SYMTP command
653 JH/32 DKIM: when a message has multiple signatures matching an identity given
654 in dkim_verify_signers, run the dkim acl once for each. Previously only
655 one run was done. Bug 2189.
657 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
658 "panic the current process" to "deliberately defer". The panic log is
659 still written with the problem list name; the mail and reject logs now
660 get a temp-reject line for the message that was being handled, saying
661 something like "domains check lookup or other defer". The SMTP 451
662 message is still "Temporary local problem".
664 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
665 A crafted sequence of BDAT commands could result in in-use memory beeing
666 freed. CVE-2017-16943.
668 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
669 from SMTP input. Previously it was always done; now only done for DATA
670 and not BDAT commands. CVE-2017-16944.
672 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
673 to the message (such as an overlong header line). Previously this was
674 not done and we did not exit BDAT mode. Followon from the previous item
675 though a different problem.
681 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
682 than -2003 did; needs libidn2 in addition to libidn.
684 JH/02 The path option on a pipe transport is now expanded before use.
686 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
687 Patch provided by "Björn", documentation fix added too.
689 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
690 missing a wire-to-host endian conversion.
692 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
693 close after a BDAT command line could be taken as a following command,
694 giving a synch failure. Fix by only checking for synch immediately
695 before acknowledging the chunk.
697 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
698 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
699 macro. Patches provided by Josh Soref.
701 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
702 Previously we did not; the RFC seems ambiguous and VRFY is not listed
703 by IANA as a service extension. However, John Klensin suggests that we
706 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
707 the dkim code may be unix-mode line endings rather than smtp wire-format
708 CRLF, so prepend a CR to any bare LF.
710 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
711 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
713 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
714 the first were themselves being wrongly included in the feed into dkim
715 processing; with most chunk sizes in use this resulted in an incorrect
716 body hash calculated value.
718 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
719 DKIM signature block, for verification. Although advised against by
720 standards it is specifically not ruled illegal.
722 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
724 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
725 missing a body hash (the bh= tag).
727 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
728 It seems that HAProxy sends the Proxy Protocol information in clear and
729 only then does a TLS startup, so do the same.
731 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
732 TCP connections (such as for Spamd) unless the daemon successfully set
733 Fast Open mode on its listening sockets. This fixes breakage seen on
734 too-old kernels or those not configured for Fast Open, at the cost of
735 requiring both directions being enabled for TFO, and TFO never being used
736 by non-daemon-related Exim processes.
738 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
739 endings, at least on the first header line. Try to canonify any that get
740 past that check, despite the cost.
742 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
743 now limited to an arbitrary five deep, while parsing addresses with the
744 strip_excess_angle_brackets option enabled.
746 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
747 instead leave the unprompted TLS handshake in socket buffer for the
748 TLS library to consume.
750 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
752 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
754 JH/16 Drop variables when they go out of scope. Memory management drops a whole
755 region in one operation, for speed, and this leaves assigned pointers
756 dangling. Add checks run only under the testsuite which checks all
757 variables at a store-reset and panics on a dangling pointer; add code
758 explicitly nulling out all the variables discovered. Fixes one known
759 bug: a transport crash, where a dangling pointer for $sending_ip_address
760 originally assigned in a verify callout, is re-used.
762 PP/06 Drop '.' from @INC in various Perl scripts.
764 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
766 PP/08 Reduce a number of compilation warnings under clang; building with
767 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
768 should be warning-free.
770 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
772 HS/01 Fix portability problems introduced by PP/08 for platforms where
773 realloc(NULL) is not equivalent to malloc() [SunOS et al].
775 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
776 chunk. This allows us to accept broken chunked messages. We need a more
777 general solution here.
779 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
780 already-broken messages in the queue.
782 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
784 JH/19 Fix reference counting bug in routing-generated-address tracking.
790 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
791 supports it and a size is available (ie. the sending peer gave us one).
793 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
794 years of being deprecated). The replacements are the ACLs
795 acl_smtp_mime and acl_not_smtp_mime.
797 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
798 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
799 or even an in-clear connection were permitted. Now, if the host lookup
800 was dnssec and dane was requested then the host is only used if the
801 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
802 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
803 if one fails this test.
804 This means that a poorly-configured remote DNS will make it incommunicado;
805 but it protects against a DNS-interception attack on it.
807 JH/04 Bug 1810: make continued-use of an open smtp transport connection
808 non-noisy when a race steals the message being considered.
810 JH/05 If main configuration option tls_certificate is unset, generate a
811 self-signed certificate for inbound TLS connections.
813 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
814 in rewrites and routers.
816 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
817 and logged a warning sing 4.83; now they are a configuration file error.
819 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
820 (lacking @domain). Apply the same qualification processing as RCPT.
822 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
824 JH/10 Support ${sha256:} applied to a string (as well as the previous
827 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
828 a cutthrough deliver is pending, as we always want to make a connection.
829 This also avoids re-routing the message when later placing the cutthrough
830 connection after a verify cache hit.
831 Do not update it with the verify result either.
833 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
834 when routing results in more than one destination address.
836 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
837 signing (which inhibits the cutthrough capability). Previously only
838 the presence of an option was tested; now an expansion evaluating as
839 empty is permissible (obviously it should depend only on data available
840 when the cutthrough connection is made).
842 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
843 the relevant preceding SMTP command did not note the pipelining mode.
845 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
846 Previously they were not counted.
848 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
849 as one having no matching records. Previously we deferred the message
850 that needed the lookup.
852 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
853 distinguished as "(=".
855 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
856 for missing MX records. Previously it only worked for missing A records.
858 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
860 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
861 after the data-go-ahead and data-ack. Patch from Jason Betts.
863 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
864 even for a "none" policy. Patch from Tony Meyer.
866 JH/22 Fix continued use of a connection for further deliveries. If a port was
867 specified by a router, it must also match for the delivery to be
870 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
871 When one of the recipients of a message was unsuitable for the connection
872 (has no matching addresses), we lost track of needing to mark it
873 deferred. As a result mail would be lost.
875 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
877 JH/25 Decoding ACL controls is now done using a binary search; the source code
878 takes up less space and should be simpler to maintain. Merge the ACL
879 condition decode tables also, with similar effect.
881 JH/26 Fix problem with one_time used on a redirect router which returned the
882 parent address unchanged. A retry would see the parent address marked as
883 delivered, so not attempt the (identical) child. As a result mail would
886 JH/27 Fix a possible security hole, wherein a process operating with the Exim
887 UID can gain a root shell. Credit to http://www.halfdog.net/ for
888 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
891 JH/28 Enable {spool,log} filesystem space and inode checks as default.
892 Main config options check_{log,spool}_{inodes,space} are now
893 100 inodes, 10MB unless set otherwise in the configuration.
895 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
896 Previously it only applied to the main-section connection policy
899 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
901 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
902 by me. Added RFC7919 DH primes as an alternative.
904 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
905 are not in the system include path.
907 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
908 GnuTLS, when a session startup failed (eg because the client disconnected)
909 Exim did stdio operations after fclose. This was exposed by a recent
910 change which nulled out the file handle after the fclose.
912 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
913 signed directly by the cert-signing cert, rather than an intermediate
914 OCSP-signing cert. This is the model used by LetsEncrypt.
916 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
918 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
919 an incoming connection.
921 HS/02 Bug 1802: Do not half-close the connection after sending a request
924 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
925 fallback to "prime256v1".
927 JH/34 SECURITY: Use proper copy of DATA command in error message.
928 Could leak key material. Remotely exploitable. CVE-2016-9963.
934 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
935 and 3.4.4 - once the server is enabled to respond to an OCSP request
936 it does even when not requested, resulting in a stapling non-aware
937 client dropping the TLS connection.
939 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
940 support variable-length bit vectors. No functional change.
942 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
943 The I= interface field on outgoing lines is now after the H= remote
944 host field, same as incoming lines. There is a separate
945 outgoing_interface log selector which allows you to disable the
948 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
949 If not running log_selector +smtp_connection the mainlog would be held
950 open indefinitely after a "too many connections" event, including to a
951 deleted file after a log rotate. Leave the per net connection logging
952 leaving it open for efficiency as that will be quickly detected by the
953 check on the next write.
955 HS/01 Bug 1671: Fix post transport crash.
956 Processing the wait-<transport> messages could crash the delivery
957 process if the message IDs didn't exist for some reason. When
958 using 'split_spool_directory=yes' the construction of the spool
959 file name failed already, exposing the same netto behaviour.
961 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
962 mime_regex ACL conditions.
964 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
965 to DSN fail messages (bounces): remote IP, remote greeting, remote response
966 to HELO, local diagnostic string.
968 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
969 log line to debug. Even when configured with a tls authenticator many
970 client connections are expected to not authenticate in this way, so
971 an authenticate fail is not an error.
973 HS/02 Add the Exim version string to the process info. This way exiwhat
974 gives some more detail about the running daemon.
976 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
977 matter for fast-change records such as DNSBLs.
979 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
980 retry record, even if constant. There may be multiple transports with
981 different interface settings and the retry behaviour needs to be kept
984 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
986 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
988 JH/10 Bug 840: fix log_defer_output option of pipe transport
990 JH/11 Bug 830: use same host for all RCPTS of a message, even under
991 hosts_randomize. This matters a lot when combined with mua_wrapper.
993 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
994 ${quote_pgsql:<string>} operator.
996 JH/13 Bug 1708: avoid misaligned access in cached lookup.
998 JH/14 Change header file name for freeradius-client. Relevant if compiling
999 with Radius support; from the Gentoo tree and checked under Fedora.
1001 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1003 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1004 option transport_filter, meaning no filtering.
1006 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1008 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1009 defaults to "*" (all hosts). The variable is now available when not built
1010 with TLS, default unset, mainly to enable keeping the testsuite sane.
1011 If a server certificate is not supplied (via tls_certificate) an error is
1012 logged, and clients will find TLS connections fail on startup. Presumably
1013 they will retry in-clear.
1014 Packagers of Exim are strongly encouraged to create a server certificate
1015 at installation time.
1017 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1018 with the $config_file variable.
1020 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1021 in transport context, after the attempt, and per-recipient. The latter type
1022 is per host attempted. The event data is the error message, and the errno
1023 information encodes the lookup type (A vs. MX) used for the (first) host,
1024 and the trailing two digits of the smtp 4xx response.
1026 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1027 to write to mainlog (or rejectlog, paniclog) in the window between file
1028 creation and permissions/ownership being changed. Particularly affects
1029 installations where exicyclog is run as root, rather than exim user;
1030 result is that the running daemon panics and dies.
1032 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1034 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1035 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1036 "pri" and "weight". Note that the previous implicit priority given by the
1037 list order is no longer honoured.
1039 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1040 for DKIM processing.
1042 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1043 by defining SUPPORT_SOCKS.
1045 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1046 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1047 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1048 variables are renamed to proxy_{local,external}_{address,port}.
1050 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1051 for a build by defining SUPPORT_I18N
1053 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1054 of the query string, and make ${quote_redis:} do that quoting.
1056 JH/29 Move Events support from Experimental to mainline, enabled by default
1057 and removable for a build by defining DISABLE_EVENT.
1059 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1061 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1062 cached by the daemon.
1064 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1065 by defining LOOKUP_REDIS. The libhiredis library is required.
1067 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1068 keys are given for lookup.
1070 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1071 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1072 only supported when built with TLS support. The PolarSSL SHA routines
1073 are still used when the TLS library is too old for convenient support.
1075 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1076 openssl_options), for security. OpenSSL forces this from version 1.1.0
1077 server-side so match that on older versions.
1079 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1080 allocation for $value could be released as the expansion processing
1081 concluded, but leaving the global pointer active for it.
1083 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1084 and to use the domains and local_parts ACL conditions.
1086 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1087 incorrectly not doubled on cutthrough transmission, hence seen as a
1088 body-termination at the receiving system - resulting in truncated mails.
1089 Commonly the sender saw a TCP-level error, and retransmitted the message
1090 via the normal store-and-forward channel. This could result in duplicates
1091 received - but deduplicating mailstores were liable to retain only the
1092 initial truncated version.
1094 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1096 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1098 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1099 we're in there, support oversigning also; bug 1309.
1101 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1103 HS/04 Add support for keep_environment and add_environment options.
1105 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1106 either intentional arithmetic overflow during PRNG, or testing config-
1109 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1110 delivery resulted in actual delivery. Cancel cutthrough before DATA
1113 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1114 rejects a recipient: pass the reject to the originator.
1116 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1117 Many were false-positives and ignorable, but it's worth fixing the
1120 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1121 for the new environment-manipulation done at startup. Move the routines
1122 from being local to tls.c to being global via the os.c file.
1124 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1125 an extract embedded as result-arg for a map, the first arg for extract
1126 is unavailable so we cannot tell if this is a numbered or keyed
1127 extraction. Accept either.
1133 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1136 JH/02 The smtp transport option "multi_domain" is now expanded.
1138 JH/03 The smtp transport now requests PRDR by default, if the server offers
1141 JH/04 Certificate name checking on server certificates, when exim is a client,
1142 is now done by default. The transport option tls_verify_cert_hostnames
1143 can be used to disable this per-host. The build option
1144 EXPERIMENTAL_CERTNAMES is withdrawn.
1146 JH/05 The value of the tls_verify_certificates smtp transport and main options
1147 default to the word "system" to access the system default CA bundle.
1148 For GnuTLS, only version 3.0.20 or later.
1150 JH/06 Verification of the server certificate for a TLS connection is now tried
1151 (but not required) by default. The verification status is now logged by
1152 default, for both outbound TLS and client-certificate supplying inbound
1155 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1158 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1159 Status Notification (bounce) messages are now MIME format per RFC 3464.
1160 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1161 under the control of the dsn_advertise_hosts option, and routers may
1162 have a dsn_lasthop option.
1164 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1165 default, modifiable by a malware= option. The list separator for
1166 the options can now be changed in the usual way. Bug 68.
1168 JH/10 The smtp_receive_timeout main option is now expanded before use.
1170 JH/11 The incoming_interface log option now also enables logging of the
1171 local interface on delivery outgoing connections.
1173 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1174 if the interface and destination host and port all match.
1176 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1179 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1180 Patch from Andrew Lewis.
1182 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1183 now supports optional time-restrictions, weighting, and priority
1184 modifiers per server. Patch originally by <rommer@active.by>.
1186 JH/16 The spamd_address main option now supports a mixed list of local
1187 and remote servers. Remote servers can be IPv6 addresses, and
1188 specify a port-range.
1190 JH/17 Bug 68: The spamd_address main option now supports an optional
1191 timeout value per server.
1193 JH/18 Bug 1581: Router and transport options headers_add/remove can
1194 now have the list separator specified.
1196 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1199 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1202 JH/21 Support for the A6 type of dns record is withdrawn.
1204 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1205 rather than the verbs used.
1207 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1208 from 255 to 1024 chars.
1210 JH/24 Verification callouts now attempt to use TLS by default.
1212 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1213 are generic router options now. The defaults didn't change.
1215 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1216 Original patch from Alexander Shikoff, worked over by JH.
1218 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1219 files if ZCAT_COMMAND is not executable.
1221 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1223 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1225 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1226 Normally benign, it bites when the pair was led to by a CNAME;
1227 modern usage is to not canonicalize the domain to a CNAME target
1228 (and we were inconsistent anyway for A-only vs AAAA+A).
1230 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1232 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1233 when evaluating $sender_host_dnssec.
1235 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1236 $sender_helo_dnssec variable.
1238 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1240 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1242 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1244 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1245 documented as working, but never had. Support all but $spam_report.
1247 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1248 added for tls authenticator.
1250 HS/03 Add perl_taintmode main config option
1256 TL/01 When running the test suite, the README says that variables such as
1257 no_msglog_check are global and can be placed anywhere in a specific
1258 test's script, however it was observed that placement needed to be near
1259 the beginning for it to behave that way. Changed the runtest perl
1260 script to read through the entire script once to detect and set these
1261 variables, reset to the beginning of the script, and then run through
1262 the script parsing/test process like normal.
1264 TL/02 The BSD's have an arc4random API. One of the functions to induce
1265 adding randomness was arc4random_stir(), but it has been removed in
1266 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1267 function when detected.
1269 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1270 cause callback expansion.
1272 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1273 syntax errors in an expansion can be treated as a string instead of
1274 logging or causing an error, due to the internal use of bool_lax
1275 instead of bool when processing it.
1277 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1278 server certificates when making smtp deliveries.
1280 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1282 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1284 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1286 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1287 Merged patch from Sebastian Wiedenroth.
1289 JH/05 Fix results-pipe from transport process. Several recipients, combined
1290 with certificate use, exposed issues where response data items split
1291 over buffer boundaries were not parsed properly. This eventually
1292 resulted in duplicates being sent. This issue only became common enough
1293 to notice due to the introduction of connection certificate information,
1294 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1296 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1297 size buffer was used, resulting in syntax errors when an expansion
1300 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1301 version 3.3.6 or later.
1303 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1304 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1305 both become "event_action", the variables become $event_name, $event_data
1306 and $event_defer_errno. There is a new variable $verify_mode, usable in
1307 routers, transports and related events. The tls:cert event is now also
1308 raised for inbound connections, if the main configuration event_action
1311 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1312 early OCSP support, but no stapling (appears to be less than 1.0.0).
1314 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1315 server certificate names available under the smtp transport option
1316 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1319 JH/10 Time-related extraction expansions from certificates now use the main
1320 option "timezone" setting for output formatting, and are consistent
1321 between OpenSSL and GnuTLS compilations. Bug 1541.
1323 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1324 encoded parameter in the incoming message. Bug 1558.
1326 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1327 include certificate info, eximon was claiming there were spoolfile
1330 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1332 JH/14 Log delivery-related information more consistently, using the sequence
1333 "H=<name> [<ip>]" wherever possible.
1335 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1336 are problematic for Debian distribution, omit them from the release
1339 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1341 JH/16 Fix string representation of time values on 64bit time_t architectures.
1344 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1345 output list separator was used.
1350 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1351 checkers that were complaining about end of non-void function with no
1354 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1355 This was a regression introduced in 4.83 by another bugfix.
1357 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1359 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1360 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1366 TF/01 Correctly close the server side of TLS when forking for delivery.
1368 When a message was received over SMTP with TLS, Exim failed to clear up
1369 the incoming connection properly after forking off the child process to
1370 deliver the message. In some situations the subsequent outgoing
1371 delivery connection happened to have the same fd number as the incoming
1372 connection previously had. Exim would try to use TLS and fail, logging
1373 a "Bad file descriptor" error.
1375 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1376 utilities have not been installed.
1378 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1379 temporary space as the ACL may create new global variables.
1381 TL/01 LDAP support uses per connection or global context settings, depending
1382 upon the detected version of the libraries at build time.
1384 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1385 to extract and use the src ip:port in logging and expansions as if it
1386 were a direct connection from the outside internet. PPv2 support was
1387 updated based on HAProxy spec change in May 2014.
1389 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1391 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1392 Properly escape header and check for NULL return.
1394 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1397 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1399 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1400 characters in header names, implemented as a verify condition.
1401 Contributed by Michael Fischer v. Mollard.
1403 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1404 results permerror and temperror. Previous values are deprecated but
1405 still accepted. In a future release, err_perm and err_temp will be
1406 completely removed, which will be a backward incompatibility if the
1407 ACL tests for either of these two old results. Patch contributed by
1408 user bes-internal on the mailing list.
1410 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1412 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1413 selectors, in both main and reject logs.
1415 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1418 JH/07 Add malware type "sock" for talking to simple daemon.
1420 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1422 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1423 routers/transports under cutthrough routing.
1425 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1426 numbers. Touch up "bool" conditional to keep the same definition.
1428 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1430 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1432 JH/12 Expand items in router/transport headers_add or headers_remove lists
1433 individually rather than the list as a whole. Bug 1452.
1435 Required for reasonable handling of multiple headers_ options when
1436 they may be empty; requires that headers_remove items with embedded
1437 colons must have them doubled (or the list-separator changed).
1439 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1440 view the policy declared in the DMARC record. Currently, $dmarc_status
1441 is a combined value of both the record presence and the result of the
1444 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1446 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1447 dnslookup router and the smtp transport (applying to the forward
1450 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1451 of ldap servers used for a specific lookup. Patch provided by Heiko
1454 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1455 New variable $lookup_dnssec_authenticated for observability.
1457 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1458 Patch submitted by Lars Timman.
1460 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1462 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1463 Requires trusted mode and valid format message id, aborts otherwise.
1464 Patch contributed by Heiko Schlichting.
1466 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1467 certextract with support for various fields. Bug 1358.
1469 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1470 is requested by default, modifiable by smtp transport option
1473 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1474 operate on certificate variables to give certificate fingerprints
1475 Also new ${sha256:cert_variable}.
1477 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1479 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1480 Christian Aistleitner.
1482 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1484 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1485 file. Patch from Wolfgang Breyha.
1487 JH/25 Expand the coverage of the delivery $host and $host_address to
1488 client authenticators run in verify callout. Bug 1476.
1490 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1491 align with daemon_smtp_ports. Bug 72.
1493 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1494 support and error reporting did not work properly.
1496 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1497 and is readable. Patch from Andrew Colin Kissa.
1499 TL/14 Enhance documentation of ${run expansion and how it parses the
1500 commandline after expansion, particularly in the case when an
1501 unquoted variable expansion results in an empty value.
1503 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1505 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1506 by renaming away from it. Addresses GH issue 15, reported by
1509 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1511 TL/15 SECURITY: prevent double expansion in math comparison functions
1512 (can expand unsanitized data). Not remotely exploitable.
1519 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1521 PP/02 Make -n do something, by making it not do something.
1522 When combined with -bP, the name of an option is not output.
1524 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1527 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1528 $sender_host_name and config options to manage this, and basic check
1531 PP/05 DSCP support for outbound connections and control modifier for inbound.
1533 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1534 (Only plugin which currently uses this is kerberos4, which nobody should
1535 be using, but we should make it available and other future plugins might
1536 conceivably use it, even though it would break NAT; stuff *should* be
1537 using channel bindings instead).
1539 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1540 name; added for Sendmail compatibility; requires admin caller.
1541 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1542 just ignore it); requires trusted caller.
1543 Also parse but ignore: -Ac -Am -X<logfile>
1546 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1548 TL/02 Add +smtp_confirmation as a default logging option.
1550 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1551 Patch by Magnus Holmgren from 2007-02-20.
1553 TL/04 Bugzilla 1281 - Spec typo.
1554 Bugzilla 1283 - Spec typo.
1555 Bugzilla 1290 - Spec grammar fixes.
1557 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1559 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1561 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1562 mailing list by by Dmitry Isaikin.
1564 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1566 JH/02 Support "G" suffix to numbers in ${if comparisons.
1568 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1570 NM/01 Bugzilla 1197 - Spec typo
1571 Bugzilla 1196 - Spec examples corrections
1573 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1575 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1576 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1579 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1580 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1582 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1583 "acl {{name}{arg}...}", and optional args on acl condition
1586 JH/05 Permit multiple router/transport headers_add/remove lines.
1588 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1590 JH/07 Avoid using a waiting database for a single-message-only transport.
1591 Performance patch from Paul Fisher. Bugzilla 1262.
1593 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1596 JH/09 Add $headers_added variable, with content from use of ACL modifier
1597 add_header (but not yet added to the message). Bugzilla 199.
1599 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1600 Pulled from Bugzilla 817 by Wolfgang Breyha.
1602 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1604 (nb: this is the same fix as in Exim 4.80.1)
1606 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1609 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1612 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1614 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1615 advertise SMTP AUTH mechanism to us, instead of a generic
1616 protocol violation error. Also, make Exim more robust to bad
1617 data from the Dovecot auth socket.
1619 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1621 When a queue runner is handling a message, Exim first routes the
1622 recipient addresses, during which it prunes them based on the retry
1623 hints database. After that it attempts to deliver the message to
1624 any remaining recipients. It then updates the hints database using
1627 So if a recipient address works intermittently, it can get repeatedly
1628 deferred at routing time. The retry hints record remains fresh so the
1629 address never reaches the final cutoff time.
1631 This is a fairly common occurrence when a user is bumping up against
1632 their storage quota. Exim had some logic in its local delivery code
1633 to deal with this. However it did not apply to per-recipient defers
1634 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1636 This change adds a proper retry rule check during routing so that the
1637 final cutoff time is checked against the message's age. We only do
1638 this check if there is an address retry record and there is not a
1639 domain retry record; this implies that previous attempts to handle
1640 the address had the retry_use_local_parts option turned on. We use
1641 this as an approximation for the destination being like a local
1642 delivery, as in LMTP.
1644 I suspect this new check makes the old local delivery cutoff check
1645 redundant, but I have not verified this so I left the code in place.
1647 TF/02 Correct gecos expansion when From: is a prefix of the username.
1649 Test 0254 submits a message to Exim with the header
1653 When I ran the test suite under the user fanf2, Exim expanded
1654 the header to contain my full name, whereas it should have added
1655 a Resent-Sender: header. It erroneously treats any prefix of the
1656 username as equal to the username.
1658 This change corrects that bug.
1660 GF/01 DCC debug and logging tidyup
1661 Error conditions log to paniclog rather than rejectlog.
1662 Debug lines prefixed by "DCC: " to remove any ambiguity.
1664 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1666 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1667 Bug spotted by Jeremy Harris; was flawed since initial commit.
1668 Would have resulted in OCSP responses post-SNI triggering an Exim
1669 NULL dereference and crash.
1671 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1673 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1674 Bug detection, analysis and fix by Samuel Thibault.
1675 Bugzilla 1331, Debian bug #698092.
1677 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1679 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1680 Server implementation by Todd Lyons, client by JH.
1681 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1682 config variable "prdr_enable" controls whether the server
1683 advertises the facility. If the client requests PRDR a new
1684 acl_data_smtp_prdr ACL is called once for each recipient, after
1685 the body content is received and before the acl_smtp_data ACL.
1686 The client is controlled by both of: a hosts_try_prdr option
1687 on the smtp transport, and the server advertisement.
1688 Default client logging of deliveries and rejections involving
1689 PRDR are flagged with the string "PRDR".
1691 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1692 fclose(). Diagnosis by Todd Lyons.
1694 PP/17 Update configure.default to handle IPv6 localhost better.
1695 Patch by Alain Williams (plus minor tweaks).
1698 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1699 This is now consistent with GnuTLS, and is now documented: the
1700 previous undocumented portable approach to treating the option as
1701 unset was to force an expansion failure. That still works, and
1702 an empty string is now equivalent.
1704 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1705 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1706 not performing validation itself.
1708 PP/20 Added force_command boolean option to pipe transport.
1709 Patch from Nick Koston, of cPanel Inc.
1711 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1714 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1716 PP/21 Fix eximon continuous updating with timestamped log-files.
1717 Broken in a format-string cleanup in 4.80, missed when I repaired the
1718 other false fix of the same issue.
1719 Report and fix from Heiko Schlichting.
1722 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1723 Report from Prashanth Katuri.
1725 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1726 It's SecureTransport, so affects any MacOS clients which use the
1727 system-integrated TLS libraries, including email clients.
1729 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1730 using a MIME ACL for non-SMTP local injection.
1731 Report and assistance in diagnosis by Warren Baker.
1733 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1735 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1737 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1738 last id that failed so it may be referenced in subsequent ACL's.
1740 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1743 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1744 ldap library initialization, allowing self-signed CA's to be
1745 used. Also properly sets require_cert option later in code by
1746 using NULL (global ldap config) instead of ldap handle (per
1747 session). Bug diagnosis and testing by alxgomz.
1749 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1750 the src/util/ subdirectory.
1752 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1753 renamed to Transport Post Delivery Action by Jeremy Harris, as
1756 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1757 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1758 redis_servers = needs to be configured which will be used by the redis
1759 lookup. Patch from Warren Baker, of The Packet Hub.
1761 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1763 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1764 hostname or reverse DNS when processing a host list. Used suggestions
1765 from multiple comments on this bug.
1767 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1769 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1770 Missed a few lines, added it to make the runtest require no keyboard
1773 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1774 contains upper case chars. Make router use caseful_local_part.
1776 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1777 support when GnuTLS has been built with p11-kit.
1783 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1785 This, or similar/improved, will also be change PP/11 of 4.82.
1791 PP/01 Handle short writes when writing local log-files.
1792 In practice, only affects FreeBSD (8 onwards).
1793 Bugzilla 1053, with thanks to Dmitry Isaikin.
1795 NM/01 Bugzilla 949 - Documentation tweak
1797 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1800 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1802 PP/02 Implemented gsasl authenticator.
1804 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1806 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1807 `pkg-config foo` for cflags/libs.
1809 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1810 with rest of GSASL and with heimdal_gssapi.
1812 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1813 `pkg-config foo` for cflags/libs for the TLS implementation.
1815 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1816 properties get this fed in as external SSF. A number of robustness
1817 and debugging improvements to the cyrus_sasl authenticator.
1819 PP/08 cyrus_sasl server now expands the server_realm option.
1821 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1822 Patch by Jeremy Harris.
1824 PP/10 Added dbmjz lookup type.
1826 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1828 PP/12 MAIL args handles TAB as well as SP, for better interop with
1829 non-compliant senders.
1830 Analysis and variant patch by Todd Lyons.
1832 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1833 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1834 Patch from Dirk Mueller <dmueller@suse.com>
1836 PP/13 tls_peerdn now print-escaped for spool files.
1837 Observed some $tls_peerdn in wild which contained \n, which resulted
1838 in spool file corruption.
1840 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1841 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1842 or write after TLS renegotiation, which otherwise led to messages
1845 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1846 as a tracking header (ie: a signed header comes before the signature).
1847 Patch from Wolfgang Breyha.
1849 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1850 comma-sep list; embedded commas doubled.
1852 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1854 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1856 Report and patch from Dmitry Banschikov.
1858 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1859 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1860 failures. We appear to now support TLS1.1+ with Exim.
1862 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1863 lets Exim select keys and certificates based upon TLS SNI from client.
1864 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1865 before an outbound SMTP session. New log_selector, +tls_sni.
1867 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1868 NULL dereference. Report and patch from Alun Jones.
1870 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1871 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1872 Not seeing resolver debug output on NetBSD, but suspect this is a
1873 resolver implementation change.
1875 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1876 Left warnings. Added "eximon gdb" invocation mode.
1878 PP/21 Defaulting "accept_8bitmime" to true, not false.
1880 PP/22 Added -bw for inetd wait mode support.
1882 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1883 locate the relevant includes and libraries. Made this the default.
1885 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1886 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1888 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1889 This may cause build issues on older platforms.
1891 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1892 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1893 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1894 Added SNI support via GnuTLS too.
1895 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1897 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1899 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1900 Applied second patch from Janne, implementing suggestion to default
1901 multiple-strings-in-record handling to match SPF spec.
1903 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1905 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1906 read-only, out of scope).
1907 Patch from Wolfgang Breyha, report from Stuart Northfield.
1909 PP/29 Fix three issues highlighted by clang analyser static analysis.
1910 Only crash-plausible issue would require the Cambridge-specific
1911 iplookup router and a misconfiguration.
1912 Report from Marcin Mirosław.
1914 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1916 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1917 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1918 As part of this, removing so much warning spew let me fix some minor
1919 real issues in debug logging.
1921 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1922 assignment on my part. Fixed.
1924 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1925 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1926 Janne Snabb (who went above and beyond: thank you).
1928 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1929 string otherwise requires a connection and a bunch more work and it's
1930 relatively easy to get wrong. Should also expose TLS library linkage
1933 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1934 64-bit ${eval} (JH/03).
1936 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1937 GNU libc to support some of the 64-bit stuff, should not lead to
1938 conflicts. Defined before os.h is pulled in, so if a given platform
1939 needs to override this, it can.
1941 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1942 protection layer was required, which is not implemented.
1943 Bugzilla 1254, patch from Wolfgang Breyha.
1945 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1946 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1947 tls_dhparam take prime identifiers. Also unbreak combination of
1948 OpenSSL+DH_params+TLSSNI.
1950 PP/39 Disable SSLv2 by default in OpenSSL support.
1956 PP/01 Solaris build fix for Oracle's LDAP libraries.
1957 Bugzilla 1109, patch from Stephen Usher.
1959 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1961 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1964 TF/02 Fix a couple more cases where we did not log the error message
1965 when unlink() failed. See also change 4.74-TF/03.
1967 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1968 lock up or crash if it happened to be inside a call to libc when it
1969 got a SIGUSR1 from exiwhat.
1971 The SIGUSR1 handler appends the current process status to the process
1972 log which is later printed by exiwhat. It used to use the general
1973 purpose logging code to do this, but several functions it calls are
1974 not safe for signals.
1976 The new output code in the SIGUSR1 handler is specific to the process
1977 log, and simple enough that it's easy to inspect for signal safety.
1978 Removing some special cases also simplifies the general logging code.
1979 Removing the spurious timestamps from the process log simplifies
1982 TF/04 Improved ratelimit ACL condition.
1984 The /noupdate option has been deprecated in favour of /readonly which
1985 has clearer semantics. The /leaky, /strict, and /readonly update modes
1986 are mutually exclusive. The update mode is no longer included in the
1987 database key; it just determines when the database is updated. (This
1988 means that when you upgrade Exim will forget old rate measurements.)
1990 Exim now checks that the per_* options are used with an update mode that
1991 makes sense for the current ACL. For example, when Exim is processing a
1992 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1993 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1994 must specify per_mail/readonly. If you omit the update mode it defaults to
1995 /leaky where that makes sense (as before) or /readonly where required.
1997 The /noupdate option is now undocumented but still supported for
1998 backwards compatibility. It is equivalent to /readonly except that in
1999 ACLs where /readonly is required you may specify /leaky/noupdate or
2000 /strict/noupdate which are treated the same as /readonly.
2002 A useful new feature is the /count= option. This is a generalization
2003 of the per_byte option, so that you can measure the throughput of other
2004 aggregate values. For example, the per_byte option is now equivalent
2005 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2007 The per_rcpt option has been generalized using the /count= mechanism
2008 (though it's more complicated than the per_byte equivalence). When it is
2009 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2010 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2011 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2012 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2013 Note that using per_rcpt with a non-readonly update mode in more than
2014 one ACL will cause the recipients to be double-counted. (The per_mail
2015 and per_byte options don't have this problem.)
2017 The handling of very low rates has changed slightly. If the computed rate
2018 is less than the event's count (usually one) then this event is the first
2019 after a long gap. In this case the rate is set to the same as this event's
2020 count, so that the first message of a spam run is counted properly.
2022 The major new feature is a mechanism for counting the rate of unique
2023 events. The new per_addr option counts the number of different
2024 recipients that someone has sent messages to in the last time period. It
2025 behaves like per_rcpt if all the recipient addresses are different, but
2026 duplicate recipient addresses do not increase the measured rate. Like
2027 the /count= option this is a general mechanism, so the per_addr option
2028 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2029 example, measure the rate that a client uses different sender addresses
2030 with the options per_mail/unique=$sender_address. There are further
2031 details in the main documentation.
2033 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2035 TF/06 Removed a few PCRE remnants.
2037 TF/07 Automatically extract Exim's version number from tags in the git
2038 repository when doing development or release builds.
2040 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2041 Bugzilla 879. Patch from Paul Fisher.
2043 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2044 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2047 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2049 PP/05 Variable $av_failed, true if the AV scanner deferred.
2050 Bugzilla 1078. Patch from John Horne.
2052 PP/06 Stop make process more reliably on build failure.
2053 Bugzilla 1087. Patch from Heiko Schlittermann.
2055 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2056 Bugzilla 1089. Patch from Heiko Schlittermann.
2058 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2059 Bugzilla 1131. Patch from Holger Weiß.
2061 PP/09 Handle IPv6 addresses with SPF.
2062 Bugzilla 860. Patch from Wolfgang Breyha.
2064 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2066 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2069 PP/11 match_* no longer expand right-hand-side by default.
2070 New compile-time build option, EXPAND_LISTMATCH_RHS.
2071 New expansion conditions, "inlist", "inlisti".
2073 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2075 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2077 PP/14 fix log_write() format string regression from TF/03.
2078 Bugzilla 1152. Patch from Dmitry Isaikin.
2084 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2086 PP/02 Harmonised TLS library version reporting; only show if debugging.
2087 Layout now matches that introduced for other libraries in 4.74 PP/03.
2089 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2091 PP/04 New "dns_use_edns0" global option.
2093 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2096 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2097 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2099 TK/01 Updated PolarSSL code to 0.14.2.
2100 Bugzilla 1097. Patch from Andreas Metzler.
2102 PP/07 Catch divide-by-zero in ${eval:...}.
2103 Fixes bugzilla 1102.
2105 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2108 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2109 format-string attack -- SECURITY: remote arbitrary code execution.
2111 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2112 time unintentionally subject to list matching rules, letting the header
2113 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2114 arbitrary string expansion). This allowed for information disclosure.
2116 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2117 INT_MIN/-1 -- value coerced to INT_MAX.
2123 NM/01 Workaround for PCRE version dependency in version reporting
2126 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2127 This fixes portability to compilers other than gcc, notably
2128 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2130 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2131 makefiles for portability to HP-UX and POSIX correctness.
2133 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2134 Also via indented variable definition in the Makefile.
2135 (Debugging by Oliver Heesakkers).
2137 PP/02 Restore caching of spamd results with expanded spamd_address.
2138 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2140 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2141 Improves build reliability. Fix from: Frank Elsner
2143 NM/02 Fix wide character breakage in the rfc2047 coding
2144 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2146 NM/03 Allow underscore in dnslist lookups
2147 Fixes bug 1026. Patch from Graeme Fowler
2149 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2150 Code patches from Adam Ciarcinski of NetBSD.
2152 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2155 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2156 is logged, to avoid truncation. Patch from John Horne.
2158 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2159 Patch from Jakob Hirsch.
2161 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2162 SQL string expansion failure details.
2163 Patch from Andrey Oktyabrski.
2165 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2166 Patch from Simon Arlott.
2168 PP/09 New lookups functionality failed to compile on old gcc which rejects
2169 extern declarations in function scope.
2170 Patch from Oliver Fleischmann
2172 PP/10 Use sig_atomic_t for flags set from signal handlers.
2173 Check getgroups() return and improve debugging.
2174 Fixed developed for diagnosis in bug 927 (which turned out to be
2177 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2178 Patch from Mark Zealey.
2180 PP/12 Bugzilla 1056: Improved spamd server selection.
2181 Patch from Mark Zealey.
2183 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2184 Based on patch from Heiko Schlittermann.
2186 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2187 Patch from Uwe Doering, sign-off by Michael Haardt.
2189 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2190 variable declaration deep within a block. Bug and patch from
2193 PP/15 lookups-Makefile IRIX compatibility coercion.
2195 PP/16 Make DISABLE_DKIM build knob functional.
2197 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2198 Patch by Simon Arlott
2200 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2201 variable argument macros. Our copy now differs from upstream.
2207 TF/01 Failure to get a lock on a hints database can have serious
2208 consequences so log it to the panic log.
2210 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2211 controlled using the smtp_confirmation log selector.
2213 TF/03 Include the error message when we fail to unlink a spool file.
2215 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2216 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2217 for maintaining out-of-tree patches for some time.
2219 PP/01 Bugzilla 139: Documentation and portability issues.
2220 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2221 Handle per-OS dynamic-module compilation flags.
2223 PP/02 Let /dev/null have normal permissions.
2224 The 4.73 fixes were a little too stringent and complained about the
2225 permissions on /dev/null. Exempt it from some checks.
2226 Reported by Andreas M. Kirchwitz.
2228 PP/03 Report version information for many libraries, including
2229 Exim version information for dynamically loaded libraries. Created
2230 version.h, now support a version extension string for distributors
2231 who patch heavily. Dynamic module ABI change.
2233 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2234 privilege escalation vulnerability whereby the Exim run-time user
2235 can cause root to append content of the attacker's choosing to
2238 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2241 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2242 If dropping privileges for untrusted macros, we disabled normal logging
2243 on the basis that it would fail; for the Exim run-time user, this is not
2244 the case, and it resulted in successful deliveries going unlogged.
2245 Fixed. Reported by Andreas Metzler.
2251 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2252 only prepend for the Resent-* case. Fixes regression introduced in
2253 Exim 4.70 by NM/22 for Bugzilla 607.
2255 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2256 increasing numbers of administrators be bitten by this.
2258 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2260 PP/03 Bugzilla 994: added openssl_options main configuration option.
2262 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2264 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2266 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2268 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2269 without a peer certificate, leading to a segfault because of an
2270 assumption that peers always have certificates. Be a little more
2271 paranoid. Problem reported by Martin Tscholak.
2273 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2274 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2275 NB: ClamAV planning to remove STREAM in "middle of 2010".
2276 CL also introduces -bmalware, various -d+acl logging additions and
2277 more caution in buffer sizes.
2279 PP/09 Implemented reverse_ip expansion operator.
2281 PP/10 Bugzilla 937: provide a "debug" ACL control.
2283 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2285 PP/12 Bugzilla 973: Implement --version.
2287 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2289 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2291 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2293 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2294 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2295 ignore trailing whitespace.
2297 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2299 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2302 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2303 Notification from Dr Andrew Aitchison.
2305 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2306 ExtendedDetectionInfo response format.
2307 Notification from John Horne.
2309 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2312 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2313 XSL and documented dependency on system catalogs, with examples of how
2316 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2319 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2320 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2321 configuration file which is writeable by the Exim user or group.
2323 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2324 of configuration files to cover files specified with the -C option if
2325 they are going to be used with root privileges, not just the default
2328 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2329 option (effectively making it always true).
2331 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2332 files to be used while preserving root privileges.
2334 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2335 that rogue child processes cannot use them.
2337 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2338 run-time user, instead of root.
2340 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2341 Exim run-time user without dropping privileges.
2343 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2344 result string, instead of calling string_vformat() twice with the same
2347 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2348 for other users. Others should always drop root privileges if they use
2349 -C on the command line, even for a whitelisted configure file.
2351 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2353 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2359 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2360 $data_path, and $header_path variables; fixed documentation bugs and
2363 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2364 exipick to access non-standard spools, including the "frozen" queue
2367 NM/01 Bugzilla 965: Support mysql stored procedures.
2368 Patch from Alain Williams
2370 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2372 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2373 Patch from Andreas Metzler
2375 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2376 Patch from Kirill Miazine
2378 NM/05 Bugzilla 671: Added umask to procmail example.
2380 JJ/03 installed exipick 20100323.0, fixing doc bug
2382 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2383 directory. Notification and patch from Dan Rosenberg.
2385 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2387 TK/02 Improve log output when DKIM signing operation fails.
2389 MH/01 Treat the transport option dkim_domain as a colon separated
2390 list, not as a single string, and sign the message with each element,
2391 omitting multiple occurences of the same signer.
2393 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2394 Bugzilla 985, 986. Patch by Simon Arlott
2396 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2397 Patch by Simon Arlott
2399 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2400 MBX locking. Notification from Dan Rosenberg.
2406 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2408 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2410 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2412 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2414 NM/04 Bugzilla 915: Flag broken perl installation during build.
2420 TK/01 Added patch by Johannes Berg that expands the main option
2421 "spamd_address" if it starts with a dollar sign.
2423 TK/02 Write list of recipients to X-Envelope-Sender header when building
2424 the mbox-format spool file for content scanning (suggested by Jakob
2427 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2428 (http://www.dcc-servers.net/) support via dccifd. Activated by
2429 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2431 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2432 by Mark Daniel Reidel <mr@df.eu>.
2434 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2435 When building exim an external PCRE library is now needed -
2436 PCRE is a system library on the majority of modern systems.
2437 See entry on PCRE_LIBS in EDITME file.
2439 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2440 conversation. Added nologin parameter to request.
2441 Patch contributed by Kirill Miazine.
2443 TF/01 Do not log submission mode rewrites if they do not change the address.
2445 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2447 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2448 log files in place. Contributed by Roberto Lima.
2450 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2452 TF/03 Bugzilla 615: When checking the local_parts router precondition
2453 after a local_part_suffix or local_part_prefix option, Exim now
2454 does not use the address's named list lookup cache, since this
2455 contains cached lookups for the whole local part.
2457 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2458 Robert Millan. Documentation is in experimental-spec.txt.
2460 TF/04 Bugzilla 668: Fix parallel build (make -j).
2462 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2464 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2465 Patch provided by Jan Srzednicki.
2467 TF/05 Leading white space used to be stripped from $spam_report which
2468 wrecked the formatting. Now it is preserved.
2470 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2471 that they are available at delivery time.
2473 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2475 TF/08 TLS error reporting now respects the incoming_interface and
2476 incoming_port log selectors.
2478 TF/09 Produce a more useful error message if an SMTP transport's hosts
2479 setting expands to an empty string.
2481 NM/06 Bugzilla 744: EXPN did not work under TLS.
2482 Patch provided by Phil Pennock.
2484 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2485 Patch provided by Richard Godbee.
2487 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2488 acl_smtp_notquit, added index entry.
2490 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2491 Patch provided by Eugene Bujak.
2493 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2494 accept(). Patch provided by Maxim Dounin.
2496 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2497 Patch provided by Phil Pennock.
2499 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2501 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2502 Patch provided by Brad "anomie" Jorsch.
2504 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2505 Patch provided by Dean Brooks.
2507 TK/05 Add native DKIM support (does not depend on external libraries).
2509 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2510 Patch provided by Graeme Fowler.
2512 NM/16 Bugzilla 851: Documentation example syntax fix.
2514 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2516 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2519 NM/19 Bugzilla 745: TLS version reporting.
2520 Patch provided by Phil Pennock.
2522 NM/20 Bugzilla 167: bool: condition support.
2523 Patch provided by Phil Pennock.
2525 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2526 clients. Patch provided by Phil Pennock.
2528 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2529 Patch provided by Brad "anomie" Jorsch.
2531 NM/23 Bugzilla 687: Fix misparses in eximstats.
2532 Patch provided by Heiko Schlittermann.
2534 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2535 Patch provided by Heiko Schlittermann.
2537 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2538 plus update to original patch.
2540 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2542 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2543 Patch provided by David Brownlee.
2545 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2547 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2549 NM/30 Bugzilla 888: TLS documentation bugfixes.
2551 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2553 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2554 Unlike the original bugzilla I have changed all shell scripts in src tree.
2556 NM/33 Bugzilla 898: Transport filter timeout fix.
2557 Patch by Todd Rinaldo.
2559 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2560 Patch by Serge Demonchaux.
2562 NM/35 Bugzilla 39: Base64 decode bug fixes.
2563 Patch by Jakob Hirsch.
2565 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2567 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2569 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2571 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2577 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2578 ALT-N's libdkim that I have put here:
2579 http://duncanthrax.net/exim-experimental/
2581 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2582 were called 'true' and it seems that C99 defines that as a reserved
2583 keyword to be used with 'bool' variable types. That means you could
2584 not include C99-style headers which use bools without triggering
2585 build errors in sieve.c.
2587 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2588 as mailq or other aliases. Changed the --help handling significantly
2589 to do whats expected. exim_usage() emits usage/help information.
2591 SC/01 Added the -bylocaldomain option to eximstats.
2593 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2595 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2597 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2603 PH/01 Another patch from the Sieve maintainer.
2605 PH/02 When an IPv6 address is converted to a string for single-key lookup
2606 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2607 dots are used instead of colons so that keys in lsearch files need not
2608 contain colons. This was done some time before quoting was made available
2609 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2610 (notated using the quote facility) so as to distinguish them from IPv4
2611 keys. This meant that lookups for IP addresses in host lists did not work
2612 for iplsearch lookups.
2614 This has been fixed by arranging for IPv6 addresses to be expressed with
2615 colons if the lookup type is iplsearch. This is not incompatible, because
2616 previously such lookups could never work.
2618 The situation is now rather anomalous, since one *can* have colons in
2619 ordinary lsearch keys. However, making the change in all cases is
2620 incompatible and would probably break a number of configurations.
2622 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2625 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2626 conversion specification without a maximum field width, thereby enabling
2627 a rogue spamd server to cause a buffer overflow. While nobody in their
2628 right mind would setup Exim to query an untrusted spamd server, an
2629 attacker that gains access to a server running spamd could potentially
2630 exploit this vulnerability to run arbitrary code as the Exim user.
2632 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2633 $primary_hostname instead of what libspf2 thinks the hosts name is.
2635 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2636 a directory entry by the name of the lookup key. Previously, if a
2637 symlink pointed to a non-existing file or a file in a directory that
2638 Exim lacked permissions to read, a lookup for a key matching that
2639 symlink would fail. Now it is enough that a matching directory entry
2640 exists, symlink or not. (Bugzilla 503.)
2642 PH/03 The body_linecount and body_zerocount variables are now exported in the
2645 PH/04 Added the $dnslist_matched variable.
2647 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2648 This means they are set thereafter only if the connection becomes
2651 PH/06 Added the client_condition to authenticators so that some can be skipped
2652 by clients under certain conditions.
2654 PH/07 The error message for a badly-placed control=no_multiline_responses left
2655 "_responses" off the end of the name.
2657 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2659 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2660 (without spaces) instead of just copying the configuration text.
2662 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2664 PH/11 Added $max_received_linelength.
2666 PH/12 Added +ignore_defer and +include_defer to host lists.
2668 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2669 way in which PCRE > 7.0 is built.
2671 PH/14 Implemented queue_only_load_latch.
2673 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2674 MAIL command. The effect was to mangle the value on 64-bit systems.
2676 PH/16 Another patch from the Sieve maintainer.
2678 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2680 PH/18 If a system quota error occurred while trying to create the file for
2681 a maildir delivery, the message "Mailbox is full" was not appended to the
2682 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2683 only to a quota excession during the actual writing of the file.
2685 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2686 characters?) which causes problems in log lines. The DN values are now
2687 passed through string_printing() before being added to log lines.
2689 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2690 and InterBase are left for another time.)
2692 PH/21 Added message_body_newlines option.
2694 PH/22 Guard against possible overflow in moan_check_errorcopy().
2696 PH/23 POSIX allows open() to be a macro; guard against that.
2698 PH/24 If the recipient of an error message contained an @ in the local part
2699 (suitably quoted, of course), incorrect values were put in $domain and
2700 $local_part during the evaluation of errors_copy.
2706 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2707 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2710 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2711 issue a MAIL command.
2713 PH/02 In an ACL statement such as
2715 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2717 if a client was not listed at all, or was listed with a value other than
2718 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2719 the condition was not true (as it should be), so access was not denied.
2720 The bug was that the ! inversion was incorrectly passed on to the second
2721 item. This has been fixed.
2723 PH/03 Added additional dnslists conditions == and =& which are different from
2724 = and & when the dns lookup returns more than one IP address.
2726 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2727 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2729 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2730 FSYNC, which compiles an option called disable_fsync that allows for
2731 bypassing fsync(). The documentation is heavily laced with warnings.
2733 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2735 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2736 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2737 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2738 including adding "make clean"; (3) Added -fPIC when compiling the test
2739 dynamically loaded module, to get rid of a warning.
2741 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2742 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2743 = 0s. The bug is otherwise harmless.
2745 PH/07 There was a bug in the dovecot authenticator such that the value of
2746 $auth1 could be overwritten, and so not correctly preserved, after a
2747 successful authentication. This usually meant that the value preserved by
2748 the server_setid option was incorrect.
2750 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2752 PH/09 Installed PCRE release 7.0.
2754 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2755 run for batched SMTP input. It is now run at the start of every message
2756 in the batch. While fixing this I discovered that the process information
2757 (output by running exiwhat) was not always getting set for -bs and -bS
2758 input. This is fixed, and it now also says "batched" for BSMTP.
2760 PH/11 Added control=no_pipelining.
2762 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2763 patch, slightly modified), and move the expansion of helo_data till after
2764 the connection is made in the smtp transport (so it can use these
2767 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2769 PH/14 Added log_selector = +pid.
2771 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2773 PH/16 Add ${if forany and ${if forall.
2775 PH/17 Added dsn_from option to vary the From: line in DSNs.
2777 PH/18 Flush SMTP output before performing a callout, unless control =
2778 no_callout_flush is set.
2780 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2781 was true (the default) a successful delivery failed to delete the retry
2782 item, thus causing premature timeout of the address. The bug is now
2785 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2787 PH/21 Long custom messages for fakedefer and fakereject are now split up
2788 into multiline responses in the same way that messages for "deny" and
2789 other ACL rejections are.
2791 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2792 with slight modification.
2794 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2795 draft, changing the syntax and factoring some duplicate code".
2797 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2798 for deliveries of the second and subsequent messages over the same SMTP
2801 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2802 ${reduce, with only minor "tidies".
2804 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2806 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2807 expansion side effects.
2809 PH/27 When a message times out after an over-quota error from an Exim-imposed
2810 quota, the bounce message says "mailbox is full". This message was not
2811 being given when it was a system quota that was exceeded. It now should
2814 MH/03 Made $recipients available in local_scan(). local_scan() already has
2815 better access to the recipient list through recipients_list[], but
2816 $recipients can be useful in postmaster-provided expansion strings.
2818 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2819 in the case of a MAIL command with additional options following the
2820 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2821 were accidentally chopped off.
2823 PH/29 SMTP synchronization checks are implemented when a command is read -
2824 there is a check that no more input is waiting when there shouldn't be
2825 any. However, for some commands, a delay in an ACL can mean that it is
2826 some time before the response is written. In this time, more input might
2827 arrive, invalidly. So now there are extra checks after an ACL has run for
2828 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2829 pipelining has not been advertised.
2831 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2833 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2834 returned in the SMTP response when smtp_return_error_details was false.
2835 This has been fixed.
2837 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2838 instead of the C I/O that was originally supplied, because problems were
2839 reported on Solaris.
2841 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2842 Exim which did not show up earlier: it was assuming that a call to
2843 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2844 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2845 was a macro that became an assignment, so it seemed to work. This has
2846 changed to a proper function call with a void return, hence the compile
2847 error. Exim's code has been fixed.
2849 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2852 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2854 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2856 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2857 because it turns out to be too big or there is a timeout) there is no
2858 "Completed" line in the log. When some messages of this type were
2859 selected by exigrep, they were listed as "not completed". Others were
2860 picked up by some special patterns. I have improved the selection
2861 criteria to be more general.
2863 PH/38 The host_find_failed option in the manualroute router can now be set
2864 to "ignore", to completely ignore a host whose IP address cannot be
2865 found. If all hosts are ignored, the behaviour is controlled by the new
2866 host_all_ignored option.
2868 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2869 homing or because of multiple MX records with /mx) generated more than
2870 one IP address, and the following item turned out to be the local host,
2871 all the secondary addresses of the first item were incorrectly removed
2872 from the list, along with the local host and any following hosts (which
2873 is what is supposed to happen).
2875 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2876 whoever called Exim into the -H file. In the case of the daemon it was
2877 behaving confusingly. When first started, it used values for whoever
2878 started the daemon, but after a SIGHUP it used the Exim user (because it
2879 calls itself on a restart). I have changed the code so that it now always
2882 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2883 message are rejected with the same error (e.g. no authentication or bad
2884 sender address), and a DATA command is nevertheless sent (as can happen
2885 with PIPELINING or a stupid MUA), the error message that was given to the
2886 RCPT commands is included in the rejection of the DATA command. This is
2887 intended to be helpful for MUAs that show only the final error to their
2890 PH/42 Another patch from the Sieve maintainer.
2892 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2893 Eximstats - Fixed some broken HTML links and added missing column headers
2895 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2896 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2898 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2900 PH/43 Yet another patch from the Sieve maintainer.
2902 PH/44 I found a way to check for a TCP/IP connection going away before sending
2903 the response to the final '.' that terminates a message, but only in the
2904 case where the client has not sent further data following the '.'
2905 (unfortunately, this is allowed). However, in many cases there won't be
2906 any further data because there won't be any more messages to send. A call
2907 to select() can be used: if it shows that the input is "ready", there is
2908 either input waiting, or the socket has been closed. An attempt to read
2909 the next input character can distinguish the two cases. Previously, Exim
2910 would have sent an OK response which the client would never have see.
2911 This could lead to message repetition. This fix should cure that, at
2912 least in a lot of common cases.
2914 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2915 advertised in response to EHLO.
2921 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2922 fixed by 4.65/MH/01 (is this a record?) are fixed:
2924 (i) An empty string was always treated as zero by the numeric comparison
2925 operators. This behaviour has been restored.
2927 (ii) It is documented that the numeric comparison operators always treat
2928 their arguments as decimal numbers. This was broken in that numbers
2929 starting with 0 were being interpreted as octal.
2931 While fixing these problems I realized that there was another issue that
2932 hadn't been noticed. Values of message_size_limit (both the global option
2933 and the transport option) were treated as octal if they started with 0.
2934 The documentation was vague. These values are now always treated as
2935 decimal, and I will make that clear in the documentation.
2941 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2942 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2945 MH/01 Don't check that the operands of numeric comparison operators are
2946 integers when their expansion is in "skipping" mode (fixes bug
2947 introduced by 4.64-PH/07).
2949 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2950 child addresses, Exim now panics and dies. Previously, because the count
2951 is held in a short int, deliveries were likely to be lost. As such a
2952 large number of recipients for a single message is ridiculous
2953 (performance will be very, very poor), I have chosen to impose a limit
2954 rather than extend the field.
2960 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2961 leftover -K file (the existence of which was triggered by #402).
2962 While we were at it, introduced process PID as part of the -K
2963 filename. This should rule out race conditions when creating
2966 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2967 processing considerably. Previous code took too long for large mails,
2968 triggering a timeout which in turn triggers #401.
2970 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2971 in the DK code in transports.c. sendfile() is not really portable,
2972 hence the _LINUX specificness.
2974 TF/01 In the add_headers option to the mail command in an Exim filter,
2975 there was a bug that Exim would claim a syntax error in any
2976 header after the first one which had an odd number of characters
2979 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2980 callout verification, Exim cached a "reject" for the entire domain. This
2981 is correct for most verifications, but it is not correct for a recipient
2982 verification with use_sender or use_postmaster set, because in that case
2983 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2984 case of MAIL FROM:<> rejection from other early rejections (e.g.
2985 rejection of HELO). When verifying a recipient using a non-null MAIL
2986 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2987 Whatever the result of the callout, the value of the domain cache is
2988 left unchanged (for any other kind of callout, getting as far as trying
2989 RCPT means that the domain itself is ok).
2991 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2994 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2995 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2996 session, the daemon ignores ECONNECT errors and logs others; it now
2997 ignores EPIPE as well.
2999 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3000 (quoted-printable decoding).
3002 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3003 later the small subsequent patch to fix an introduced bug.
3005 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3007 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3009 PH/08 An error is now given if message_size_limit is specified negative.
3011 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3012 to be given (somewhat) arbitrary names.
3014 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3017 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3018 miscellaneous code fixes
3020 PH/10 Added the log_reject_target ACL modifier to specify where to log
3023 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3024 hostname. This is wrong, because it relates to the incoming message (and
3025 probably the interface on which it is arriving) and not to the outgoing
3026 callout (which could be using a different interface). This has been
3027 changed to use the value of the helo_data option from the smtp transport
3028 instead - this is what is used when a message is actually being sent. If
3029 there is no remote transport (possible with a router that sets up host
3030 addresses), $smtp_active_hostname is used.
3032 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3033 tweaks were necessary in order to get it to work (see also 21 below):
3034 (a) The code assumed that strncpy() returns a negative number on buffer
3035 overflow, which isn't the case. Replaced with Exim's string_format()
3037 (b) There were several signed/unsigned issues. I just did the minimum
3038 hacking in of casts. There is scope for a larger refactoring.
3039 (c) The code used strcasecmp() which is not a standard C function.
3040 Replaced with Exim's strcmpic() function.
3041 (d) The code set only $1; it now sets $auth1 as well.
3042 (e) A simple test gave the error "authentication client didn't specify
3043 service in request". It would seem that Dovecot has changed its
3044 interface. Fortunately there's a specification; I followed it and
3045 changed what the client sends and it appears to be working now.
3047 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3050 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3051 address A is aliased to B and C, where B exists and C does not. Without
3052 -v the output is "A verified" because verification stops after a
3053 successful redirection if more than one address is generated. However,
3054 with -v the child addresses are also verified. Exim was outputting "A
3055 failed to verify" and then showing the successful verification for C,
3056 with its parentage. It now outputs "B failed to verify", showing B's
3057 parentage before showing the successful verification of C.
3059 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3060 look up a TXT record in a specific list after matching in a combined
3063 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3064 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3065 they consult the DNS. I had assumed they would set it the way they
3066 wanted; and indeed my experiments on Linux seem to show that in some
3067 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3068 To be on the safe side, however, I have now made the interface to
3069 host_find_byname() similar to host_find_bydns(), with an argument
3070 containing the DNS resolver options. The host_find_byname() function now
3071 sets these options at its start, just as host_find_bydns() does. The smtp
3072 transport options dns_qualify_single and dns_search_parents are passed to
3073 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3074 of host_find_byname() use the default settings of RES_DEFNAMES
3075 (qualify_single) but not RES_DNSRCH (search_parents).
3077 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3078 spool_read_header() do less string testing, by means of a preliminary
3079 switch on the second character of optional "-foo" lines. (This is
3080 overdue, caused by the large number of possibilities that now exist.
3081 Originally there were few.) While I was there, I also converted the
3082 str(n)cmp tests so they don't re-test the leading "-" and the first
3083 character, in the hope this might squeeze out yet more improvement.
3085 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3086 flag allowing group syntax was set by the header_syntax check but not
3087 turned off, possible causing trouble later; (2) The flag was not being
3088 set at all for the header_verify test, causing "group"-style headers to
3089 be rejected. I have now set it in this case, and also caused header_
3090 verify to ignore an empty address taken from a group. While doing this, I
3091 came across some other cases where the code for allowing group syntax
3092 while scanning a header line wasn't quite right (mostly, not resetting
3093 the flag correctly in the right place). These bugs could have caused
3094 trouble for malformed header lines. I hope it is now all correct.
3096 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3097 with the "reply" argument non-NULL. The code, however (which originally
3098 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3099 but it didn't always do it. This confused somebody who was copying the
3100 code for some other use. I have removed all the tests.
3102 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3103 feature that was used to support insecure browsers during the U.S. crypto
3104 embargo. It requires special client support, and Exim is probably the
3105 only MTA that supported it -- and would never use it because real RSA is
3106 always available. This code has been removed, because it had the bad
3107 effect of slowing Exim down by computing (never used) parameters for the
3108 RSA_EXPORT functionality.
3110 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3111 authenticator to fail if there's a tab character in the incoming data
3112 (there should never be unless someone is messing about, as it's supposed
3113 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3114 if the connection is using TLS or if the remote IP is the same as the
3115 local IP, and the "valid-client-cert option" if a client certificate has
3118 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3119 authenticators. This can be used for authorization after authentication
3120 succeeds. (In the case of plaintext, it servers for both authentication
3123 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3124 if any retry times were supplied.
3126 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3127 connection, where there is no client IP address to check. In this
3128 situation, the verify now always succeeds.
3130 PH/25 Applied John Jetmore's -Mset patch.
3132 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3134 PH/27 In a string expansion for a processed (not raw) header when multiple
3135 headers of the same name were present, leading whitespace was being
3136 removed from all of them, but trailing whitespace was being removed only
3137 from the last one. Now trailing whitespace is removed from each header
3138 before concatenation. Completely empty headers in a concatenation (as
3139 before) are ignored.
3141 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3142 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3144 PH/29 [Removed. This was a change that I later backed out, and forgot to
3145 correct the ChangeLog entry (that I had efficiently created) before
3146 committing the later change.]
3148 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3149 address errors (4xx response to RCPT) over the same connection as other
3150 messages routed to the same hosts. Such deliveries are always "forced",
3151 so retry times are not inspected. This resulted in far too many retries
3152 for the affected addresses. The effect occurred only when there were more
3153 hosts than the hosts_max_try setting in the smtp transport when it had
3154 the 4xx errors. Those hosts that it had tried were not added to the list
3155 of hosts for which the message was waiting, so if all were tried, there
3156 was no problem. Two fixes have been applied:
3158 (i) If there are any address or message errors in an SMTP delivery, none
3159 of the hosts (tried or untried) are now added to the list of hosts
3160 for which the message is waiting, so the message should not be a
3161 candidate for sending over the same connection that was used for a
3162 successful delivery of some other message. This seems entirely
3163 reasonable: after all the message is NOT "waiting for some host".
3164 This is so "obvious" that I'm not sure why it wasn't done
3165 previously. Hope I haven't missed anything, but it can't do any
3166 harm, as the worst effect is to miss an optimization.
3168 (ii) If, despite (i), such a delivery is accidentally attempted, the
3169 routing retry time is respected, so at least it doesn't keep
3170 hammering the server.
3172 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3173 in ${readsocket because some servers need this prod.
3175 PH/32 Added some extra debug output when updating a wait-xxx database.
3177 PH/33 The hint "could be header name not terminated by colon", which has been
3178 given for certain expansion errors for a long time, was not being given
3179 for the ${if def:h_colon_omitted{... case.
3181 PH/34 The spec says: "With one important exception, whenever a domain list is
3182 being scanned, $domain contains the subject domain." There was at least
3183 one case where this was not true.
3185 PH/35 The error "getsockname() failed: connection reset by peer" was being
3186 written to the panic log as well as the main log, but it isn't really
3187 panic-worthy as it just means the connection died rather early on. I have
3188 removed the panic log writing for the ECONNRESET error when getsockname()
3191 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3192 runs only) independently of the message's sender address. This meant
3193 that, if the 4xx error was in fact related to the sender, a different
3194 message to the same recipient with a different sender could confuse
3195 things. In particular, this can happen when sending to a greylisting
3196 server, but other circumstances could also provoke similar problems.
3197 I have changed the default so that the retry time for these errors is now
3198 based a combination of the sender and recipient addresses. This change
3199 can be overridden by setting address_retry_include_sender=false in the
3202 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3203 remote server are returned as part of bounce messages. This was not
3204 happening for LMTP over a pipe (the lmtp transport), but now it is the
3205 same for both kinds of LMTP.
3207 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3208 in header lines that were in fact CNAMEs. This is no longer the case.
3210 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3211 and queue runs started by the daemon processed all messages. This has
3212 been fixed so that -R and -S can now usefully be given with -q<time>.
3214 PH/40 Import PCRE release 6.7 (fixes some bugs).
3216 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3218 PH/42 Give an error if -q is specified more than once.
3220 PH/43 Renamed the variables $interface_address and $interface_port as
3221 $received_ip_address and $received_port, to make it clear that these
3222 values apply to message reception, and not to the outgoing interface when
3223 a message is delivered. (The old names remain recognized, of course.)
3225 PH/44 There was no timeout on the connect() call when using a Unix domain
3226 socket in the ${readsocket expansion. There now is.
3228 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3229 be meaningful with "accept".
3231 SC/01 Eximstats V1.43
3232 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3234 SC/02 Eximstats V1.44
3235 Use a glob alias rather than an array ref in the generated
3236 parser. This improves both readability and performance.
3238 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3239 Collect SpamAssassin and rejection statistics.
3240 Don't display local sender or destination tables unless
3241 there is data to show.
3242 Added average volumes into the top table text output.
3244 SC/04 Eximstats V1.46
3245 Collect data on the number of addresses (recipients)
3246 as well as the number of messages.
3248 SC/05 Eximstats V1.47
3249 Added 'Message too big' to the list of mail rejection
3250 reasons (thanks to Marco Gaiarin).
3252 SC/06 Eximstats V1.48
3253 Mainlog lines which have GMT offsets and are too short to
3254 have a flag are now skipped.
3256 SC/07 Eximstats V1.49 (Alain Williams)
3257 Added the -emptyok flag.
3259 SC/08 Eximstats V1.50
3260 Fixes for obtaining the IP address from reject messages.
3262 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3263 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3264 whitespace changes from 4.64-PH/27
3266 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3269 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3270 are found, allow negative numbers in numeric criteria)
3272 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3274 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3275 to match changes made in 4.64-PH/43
3277 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3279 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3280 "domain" is actually an IP address, and force a failure. This locks out
3281 those revolvers/nameservers that support "A-for-A" lookups, in
3282 contravention of the specifications.
3284 PH/48 When a host name was looked up from an IP address, and the subsequent
3285 forward lookup of the name timed out, the host name was left in
3286 $sender_host_name, contrary to the specification.
3288 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3289 restricted to single-key lookups, Exim was not diagnosing an error if
3290 * or *@ was used with a query-style lookup.
3292 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3294 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3295 long ago, but noone interested enough thought of it. Let's just say that
3296 the "1.1" means that there are some new functions that weren't there at
3297 some point in the past.
3299 PH/51 Error processing for expansion failure of helo_data from an smtp
3300 transport during callout processing was broken.
3302 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3303 tested/used via the -bh/-bhc/-bs options.
3305 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3306 bug, fixed in subsequent PCRE releases).
3308 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3309 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3311 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3317 SC/01 Use a glob alias rather than an array ref in eximstats generated
3318 parser. This improves both readability and performance.
3320 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3321 Don't display local sender or destination tables in eximstats unless
3322 there is data to show.
3323 Added average volumes into the eximstats top table text output.
3325 SC/03 Collect data on the number of addresses (recipients) as well
3326 as the number of messages in eximstats.
3328 TF/01 Correct an error in the documentation for the redirect router. Exim
3329 does (usually) call initgroups() when daemonizing.
3331 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3332 with consistent privilege compared to when running as a daemon.
3334 TF/03 Note in the spec that $authenticated_id is not set for local
3335 submissions from trusted users.
3337 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3338 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3340 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3341 by adding some example configuration directives to the default
3342 configuration file. A little bit of work is required to uncomment the
3343 directives and define how usernames and passwords are checked, but
3344 there is now a framework to start from.
3346 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3347 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3348 without this. I don't know how relevant this is to other LDAP libraries.
3350 PH/02 Add the verb name to the "unknown ACL verb" error.
3352 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3354 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3356 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3357 directory not expanded when it should be if an expanded home directory
3358 was set for the address (which is overridden by the transport).
3360 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3363 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3364 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3365 because it is too late at that time, and has no effect.
3367 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3368 security issue with \' (bugzilla #107). I could not use the
3369 PQescapeStringConn() function, because it needs a PGconn value as one of
3372 PH/08 When testing addresses using -bt, indicate those final addresses that
3373 are duplicates that would not cause an additional delivery. At least one
3374 person was confused, thinking that -bt output corresponded to deliveries.
3375 (Suppressing duplicates isn't a good idea as you lose the information
3376 about possibly different redirections that led to the duplicates.)
3378 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3379 systems where poll() doesn't work, in particular OS X.
3381 PH/10 Added more information to debugging output for retry time not reached.
3383 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3384 operations in malware.c.
3386 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3389 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3390 syslog_duplication set false, log lines that would normally be written
3391 both the the main log and to the reject log were not written to syslog at
3394 PH/14 In the default configuration, change the use of "message" in ACL warn
3395 statements to "add_header".
3397 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3398 not followed by a command (e.g. "seen endif").
3400 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3401 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3404 PH/17 Added extra conditions to the default value of delay_warning_condition
3408 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3409 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3410 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3413 The Auto-Submitted: and various List- headers are standardised, whereas I
3414 don't think Precedence: ever was.
3416 PH/18 Refactored debugging code in route_finduser() to show more information,
3417 in particular, the error code if getpwnam() issues one.
3419 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3420 This is apparently needed in addition to the PH/07 change above to avoid
3421 any possible encoding problems.
3423 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3424 but not after initializing Perl.
3426 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3427 output them only if debugging. By default they are written stderr,
3428 apparently, which is not desirable.
3430 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3433 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3436 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3438 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3439 authenticated or an ident call has been made. Suppress the default
3440 values for $authenticated_id and $authenticated_sender (but permit -oMai
3441 and -oMas) when testing with -bh.
3443 PH/24 Re-jigged the order of the tests in the default configuration so that the
3444 tests for valid domains and recipients precede the DNS black list and CSA
3445 tests, on the grounds that those ones are more expensive.
3447 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3448 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3449 This bug exists in every version of Exim that I still have, right back to
3452 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3453 However, an attempt to turn on case-sensitivity in a regex key by
3454 including (?-i) didn't work because the subject string was already
3455 lowercased, and the effects were non-intuitive. It turns out that a
3456 one-line patch can be used to allow (?-i) to work as expected.
3462 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3463 other effects) broke the use of negated acl sub-conditions.
3465 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3468 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3469 "Deny" causes Exim to reject the incoming connection with a 554 error.
3470 Unfortunately, if there is a major crisis, such as a disk failure,
3471 tcp-wrappers gives "deny", whereas what one would like would be some
3472 kind of temporary error. A kludge has been added to help with this.
3473 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3474 554 error is used if errno is still zero or contains ENOENT (which occurs
3475 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3478 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3480 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3481 errors. Otherwise a message that provokes a temporary error (when other
3482 messages do not) can cause a whole host to time out.
3484 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3485 addresses were routed directly to files or pipes from a redirect router.
3486 File deliveries just didn't batch; pipe deliveries might have suffered
3489 PH/06 A failure to get a lock for a hints database would erroneously always say
3490 "Failed to get write lock", even when it was really a read lock.
3492 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3493 of 0600. This has been changed to use the value of the lockfile_mode
3494 option (which defaults to 0600).
3496 PH/08 Applied small patch from the Sieve maintainer.
3498 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3499 folder from quota calculations, a direct delivery into this folder messed
3500 up the contents of the maildirsize file. This was because the regex was
3501 used only to exclude .Trash (or whatever) when the size of the mailbox
3502 was calculated. There was no check that a delivery was happening into an
3503 excluded directory. This bug has been fixed by ignoring all quota
3504 processing for deliveries into excluded directories.
3506 PH/10 Added the maildirfolder_create_regex option to appendfile.
3512 PH/01 The code for finding all the local interface addresses on a FreeBSD
3513 system running IPv6 was broken. This may well have applied to all BSD
3514 systems, as well as to others that have similar system calls. The broken
3515 code found IPv4 interfaces correctly, but gave incorrect values for the
3516 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3517 that it would not match correctly against @[] and not recognize the IPv6
3520 PH/02 The ipliteral router was not recognizing addresses of the form user@
3521 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3523 PH/03 Added disable_ipv6.
3525 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3526 decoded form, because it is most often used to construct To: headers
3527 lines in autoreplies, and the decoded form may well be syntactically
3528 invalid. However, $reply_address has leading white space removed, and all
3529 newlines turned into spaces so that the autoreply transport does not
3532 PH/05 If group was specified without a user on a router, and no group or user
3533 was specified on a transport, the group from the router was ignored.
3535 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3536 for visible compile-time settings that can be used to change these
3537 numbers, for those that want even more. Backwards compatibility with old
3538 spool files has been maintained. However, going back to a previous Exim
3539 release will lost any variables that are in spool files.
3541 PH/07 Two small changes when running in the test harness: increase delay when
3542 passing a TCP/IP connection to a new process, in case the original
3543 process has to generate a bounce, and remove special handling of
3544 127.0.0.2 (sic), which is no longer necessary.
3546 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3547 be the same on different OS.
3549 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3552 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3553 whether --show-vars was specified or not
3555 JJ/02 exipick: Added support for new ACL variable spool format introduced
3558 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3559 syntactically invalid From: or Reply-to: line, and a filter used this to
3560 generate an autoreply, and therefore failed to obtain an address for the
3561 autoreply, Exim could try to deliver to a non-existent relative file
3562 name, causing unrelated and misleading errors. What now happens is that
3563 it logs this as a hard delivery error, but does not attempt to create a
3566 PH/11 The exinext utility has a -C option for testing purposes, but although
3567 the given file was scanned by exinext itself; it wasn't being passed on
3568 when Exim was called.
3570 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3571 an end-of-file indication when reading a command response.
3573 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3574 compiled. In many other places in Exim, IPv6 addresses are always
3575 recognized, so I have changed this. It also means that IPv4 domain
3576 literals of the form [IPV4:n.n.n.n] are now always recognized.
3578 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3579 used if the router is not running as root, for example, when verifying at
3580 ACL time, or when using -bh. The debugging output from this situation was
3581 non-existent - all you got was a failure to exec. I have made two
3584 (a) Failures to set uid/gid, the current directory, or a process leader
3585 in a subprocess such as that created by queryprogram now generate
3586 suitable debugging output when -d is set.
3588 (b) The queryprogram router detects when it is not running as root,
3589 outputs suitable debugging information if -d is set, and then runs
3590 the subprocess without attempting to change uid/gid.
3592 PH/15 Minor change to Makefile for building test_host (undocumented testing
3595 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3596 additional section of a DNS packet that returns MX or SRV records.
3597 Instead, it always explicitly searches for A/AAAA records. This avoids
3598 major problems that occur when a DNS server includes only records of one
3599 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3600 fixed another bug: if SRV records were looked up and the corresponding
3601 address records were *not* found in the additional section, the port
3602 values from the SRV records were lost.
3604 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3605 using the correct key (the original address) when searching the retry
3606 rules in order to find which one to use for generating the retry hint.
3608 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3609 adding the default one. Similarly, if it contains a Reply-To: header, the
3610 errors_reply_to option, if set, is not used.
3612 PH/19 When calculating a retry time, Exim used to measure the "time since
3613 failure" by looking at the "first failed" field in the retry record. Now
3614 it does not use this if it is later than than the arrival time of the
3615 message. Instead it uses the arrival time. This makes for better
3616 behaviour in cases where some deliveries succeed, thus re-setting the
3617 "first failed" field. An example is a quota failure for a huge message
3618 when small messages continue to be delivered. Without this change, the
3619 "time since failure" will always be short, possible causing more frequent
3620 delivery attempts for the huge message than are intended.
3621 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3623 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3624 $1, $2, $3) because the numerical variables can be reset during some
3625 expansion items (e.g. "match"), thereby losing the authentication data.
3627 PH/21 Make -bV show the size of off_t variables so that the test suite can
3628 decide whether to run tests for quotas > 2G.
3630 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3631 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3632 filecount value is greater than 2G or if a quota value is greater than 2G
3633 on a system where the size of off_t is not greater than 4, a panic error
3636 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3637 never match. The debug and -bh output now contains an explicit error
3638 message indicating a malformed IPv4 address or mask.
3640 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3641 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3642 PH/23 above applies.
3644 PH/25 Do not write to syslog when running in the test harness. The only
3645 occasion when this arises is a failure to open the main or panic logs
3646 (for which there is an explicit test).
3648 PH/26 Added the /no_tell option to "control=freeze".
3650 PH/27 If a host name lookup failed very early in a connection, for example, if
3651 the IP address matched host_lookup and the reverse lookup yielded a name
3652 that did not have a forward lookup, an error message of the form "no IP
3653 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3654 could be logged. Now it outputs the IP address instead of "NULL".
3656 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3657 allows the sender and the authenticated sender to be set when
3658 submitting a message from within Exim. Since child_open_exim() is
3659 documented for local_scan(), the new function should be too.
3661 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3662 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3663 results in an empty string is now treated as unset.
3665 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3667 PH/31 Added sender_verify_fail logging option.
3669 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3670 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3671 tidied the source and removed it altogether.
3673 PH/33 When a queue run was abandoned because the load average was too high, a
3674 log line was always written; now it is written only if the queue_run log
3675 selector is set. In addition, the log line for abandonment now contains
3676 information about the queue run such as the pid. This is always present
3677 in "start" and "stop" lines but was omitted from the "abandon" line.
3679 PH/34 Omit spaces between a header name and the colon in the error message that
3680 is given when verify = headers_syntax fails (if there are lots of them,
3681 the message gets confusing).
3683 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3684 names, as there are now some PTR records that contain slashes. This check
3685 is only to protect against broken name servers that fall over on strange
3686 characters, so the fact that it applies to all lookups doesn't matter.
3688 PH/36 Now that the new test suite is complete, we can remove some of the
3689 special code in Exim that was needed for the old test suite. For example,
3690 sorting DNS records because real resolvers return them in an arbitrary
3691 order. The new test suite's fake resolver always returns records in the
3694 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3695 bounces) except when queue_only is set, to avoid logging races between
3696 the different processes.
3698 PH/38 Panic-die if .include specifies a non-absolute path.
3700 PH/39 A tweak to the "H" retry rule from its user.
3702 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3703 a label. They prevented compilation on older perls.
3705 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3706 a warning to be raised on newish perls.
3708 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3709 on queue. Changes to match documented behaviour of showing count of
3710 messages matching specified criteria.
3712 PH/40 Changed the default ident timeout from 30s to 5s.
3714 PH/41 Added support for the use of login_cap features, on those BSD systems
3715 that have them, for controlling the resources used by pipe deliveries.
3717 PH/42 The content-scanning code uses fopen() to create files in which to put
3718 message data. Previously it was not paying any attention to the mode of
3719 the files. Exim runs with umask(0) because the rest of the code creates
3720 files with open(), and sets the required mode explicitly. Thus, these
3721 files were ending up world-writeable. This was not a big issue, because,
3722 being within the spool directory, they were not world-accessible. I have
3723 created a function called modefopen, which takes an additional mode
3724 argument. It sets umask(777), creates the file, chmods it to the required
3725 mode, then resets the umask. All the relevant calls to fopen() in the
3726 content scanning code have been changed to use this function.
3728 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3729 to 24 hours. This avoids potential overflow problems when processing G
3730 and H retry rules. I suspect nobody ever tinkers with this value.
3732 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3734 PH/45 When the plaintext authenticator is running as a client, the server's
3735 challenges are checked to ensure they are valid base64 strings. By
3736 default, the authentication attempt is cancelled if an invalid string is
3737 received. Setting client_ignore_invalid_base64 true ignores these errors.
3738 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3739 they are received. Thus, the responses can be made to depend on the
3740 challenges. If an invalid string is ignored, an empty string is placed in
3743 PH/46 Messages that are created by the autoreply transport now contains a
3744 References: header, in accordance with RFCs 2822 and 3834.
3746 PH/47 Added authenticated_sender_force to the smtp transport.
3748 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3750 PH/49 Installed latest patch from the Sieve maintainer.
3752 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3753 was also set, the appendfile transport was unnecessarily scanning a
3754 directory of message files (e.g. for maildir delivery) to find the count
3755 of files (along with the size), even though it did not need this
3756 information. It now does the scan only if it needs to find either the
3757 size of the count of files.
3759 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3761 PH/52 Two bugs concerned with error handling when the smtp transport is
3764 (i) Exim was not creating retry information for temporary errors given
3765 for individual recipients after the DATA command when the smtp transport
3766 was used in LMTP mode. This meant that they could be retried too
3767 frequently, and not timed out correctly.
3769 (ii) Exim was setting the flag that allows error details to be returned
3770 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3771 recipients that were returned after the DATA command.
3773 PH/53 This is related to PH/52, but is more general: for any failing address,
3774 when detailed error information was permitted to be returned to the
3775 sender, but the error was temporary, then after the final timeout, only
3776 "retry timeout exceeded" was returned. Now it returns the full error as
3777 well as "retry timeout exceeded".
3779 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3780 do this, and (what is worse) MTAs that accept it.
3782 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3783 will now be deprecated.
3785 PH/56 New os.c-cygwin from the Cygwin maintainer.
3787 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3788 formats (previously only available in exim formats via -bpr, -bpru,
3789 and -bpra. Now also available in native and exiqgrep formats)
3791 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3792 with very large, slow to parse queues
3794 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3796 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3798 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3799 responses to authentication challenges, though it was showing the
3800 challenges; (ii) I've removed the CR characters from the debug output for
3803 PH/58 Allow for the insertion of a newline as well as a space when a string
3804 is turned into more than one encoded-word during RFC 2047 encoding. The
3805 Sieve code now uses this.
3807 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3808 data_4xx, lost_connection, tls_required.
3810 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3811 message was being sent as an SMTP response.
3813 PH/61 Add -l and -k options to exicyclog.
3815 PH/62 When verifying, if an address was redirected to one new address, so that
3816 verification continued, and the new address failed or deferred after
3817 having set something in $address_data, the value of $address_data was not
3818 passed back to the ACL. This was different to the case when no
3819 redirection occurred. The value is now passed back in both cases.
3821 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3822 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3823 use login_cap.h, so on its own it isn't the distinguishing feature. The
3824 new name refers directly to the setclassresources() function.
3826 PH/65 Added configuration files for NetBSD3.
3828 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3830 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3831 is preferred over IPv4.
3833 PH/68 The bounce_return_message and bounce_return_body options were not being
3834 honoured for bounces generated during the reception of non-SMTP messages.
3835 In particular, this applied to messages rejected by the ACL. This bug has
3836 been fixed. However, if bounce_return_message is true and bounce_return_
3837 body is false, the headers that are returned for a non-SMTP message
3838 include only those that have been read before the error was detected.
3839 (In the case of an ACL rejection, they have all been read.)
3841 PH/69 The HTML version of the specification is now built in a directory called
3842 spec_html instead of spec.html, because the latter looks like a path with
3843 a MIME-type, and this confuses some software.
3845 PH/70 Catch two compiler warnings in sieve.c.
3847 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3848 function verify_get_ident() calls ip_connect() to connect a socket, but
3849 if the "connect()" function timed out, ip_connect() used to close the
3850 socket. However, verify_get_ident() also closes the socket later, and in
3851 between Exim writes to the log, which may get opened at this point. When
3852 the socket was closed in ip_connect(), the log could get the same file
3853 descriptor number as the socket. This naturally causes chaos. The fix is
3854 not to close the socket in ip_connect(); the socket should be closed by
3855 the function that creates it. There was only one place in the code where
3856 this was missing, in the iplookup router, which I don't think anybody now
3857 uses, but I've fixed it anyway.
3859 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3860 well as to direct DNS lookups. Otherwise the handling of names in host
3861 lists is inconsistent and therefore confusing.
3867 PH/01 Two changes to the default runtime configuration:
3869 (1) Move the checks for relay_from_hosts and authenticated clients from
3870 after to before the (commented out) DNS black list checks.
3872 (2) Add control=submission to the relay_from_hosts and authenticated
3873 clients checks, on the grounds that messages accepted by these
3874 statements are most likely to be submissions.
3876 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3878 (1) Generate an error if the third argument for the ${prvs expansion is
3881 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3884 (3) Reset the variables that are obtained from the first argument of
3885 ${prvscheck and used in the second argument before leaving the code,
3886 because their memory is reclaimed, so using them afterwards may do
3889 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3890 one (it's much easier than Tom thought :-).
3892 (5) Because of (4), we can now allow for the use of $prvscheck_result
3893 inside the third argument.
3895 PH/03 For some reason, the default setting of PATH when running a command from
3896 a pipe transport was just "/usr/bin". I have changed it to
3899 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3900 anything to be listed in the output from -bV.
3902 PH/05 When a filter generated an autoreply, the entire To: header line was
3903 quoted in the delivery log line, like this:
3905 => >A.N.Other <ano@some.domain> <original@ddress> ...
3907 This has been changed so that it extracts the operative address. There
3908 may be more than one such address. If so, they are comma-separated, like
3911 => >ano@some.domain,ona@other.domain <original@ddress> ...
3913 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3914 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3915 not being looked up in the rDNS to get a host name, Exim was showing the
3916 IP address twice in Received: lines, even though the IP addresses were
3917 identical. For example:
3919 Received: from [1.2.3.4] (helo=[1.2.3.4])
3921 However, if the real host name was known, it was omitting the HELO data
3922 if it matched the actual IP address. This has been tidied up so that it
3923 doesn't show the same IP address twice.
3925 PH/07 When both +timestamp and +memory debugging was on, the value given by
3926 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3927 called by the debug printing, thereby overwriting the timestamp buffer.
3928 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3930 PH/08 When the original message was included in an autoreply transport, it
3931 always said "this is a copy of the message, including all the headers",
3932 even if body_only or headers_only was set. It now gives an appropriate
3935 PH/09 Applied a patch from the Sieve maintainer which:
3937 o fixes some comments
3938 o adds the (disabled) notify extension core
3939 o adds some debug output for the result of if/elsif tests
3940 o points to the current vacation draft in the documentation
3941 and documents the missing references header update
3945 o fixes a bug in processing the envelope test (when testing
3946 multiple envelope elements, the last element determined the
3949 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3950 Electronic Mail") by including:
3952 Auto-submitted: auto-generated
3954 in the messages that it generates (bounce messages and others, such as
3955 warnings). In the case of bounce messages for non-SMTP messages, there was
3956 also a typo: it was using "Auto_submitted" (underscore instead of
3957 hyphen). Since every message generated by Exim is necessarily in response
3958 to another message, thes have all been changed to:
3960 Auto-Submitted: auto-replied
3962 in accordance with these statements in the RFC:
3964 The auto-replied keyword:
3966 - SHOULD be used on messages sent in direct response to another
3967 message by an automatic process,
3969 - MUST NOT be used on manually-generated messages,
3971 - MAY be used on Delivery Status Notifications (DSNs) and Message
3972 Disposition Notifications (MDNs),
3974 - MUST NOT be used on messages generated by automatic or periodic
3975 processes, except for messages which are automatic responses to
3978 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3979 to the default Received: header definition.
3981 PH/12 Added log selector acl_warn_skipped (default on).
3983 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3984 variables because (a) they are in the wrong storage pool and (b) even if
3985 they were copied, it wouldn't work properly because of the caching.
3987 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3988 checking when decoding. Apparently there are clients that generate
3989 overlong encoded strings. Why am I not surprised?
3991 PH/15 If the first argument of "${if match_address" was not empty, but did not
3992 contain an "@" character, Exim crashed. Now it writes a panic log message
3993 and treats the condition as false.
3995 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3997 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3998 extension "envelope-auth". The code is finished and in agreement with
3999 other implementations, but there is no documentation so far and in fact,
4000 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4001 not changing the active code.
4003 Print executed "if" and "elsif" statements when debugging is used. This
4004 helps a great deal to understand what a filter does.
4006 Document more things not specified clearly in RFC3028. I had all this
4007 sorted out, when out of a sudden new issues came to my mind. Oops."
4009 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4012 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4013 canonical form (as documented). However, after a host name lookup from
4014 the IP address, check_host() was doing a simple string comparison with
4015 addresses acquired from the DNS when checking that the found name did
4016 have the original IP as one of its addresses. Since any found IPv6
4017 addresses are likely to be in abbreviated form, the comparison could
4018 fail. Luckily, there already exists a function for doing the comparison
4019 by converting both addresses to binary, so now that is used instead of
4020 the text comparison.
4022 PH/20 There was another similar case to PH/19, when a complete host name was
4023 given in a host list; looking up its IP address could give an abbreviated
4024 form, whereas the current host's name might or might not be abbreviated.
4025 The same fix has been applied.
4031 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4032 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4035 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4036 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4038 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4040 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4041 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4042 Also, for "Auto-Submitted", treat anything other than "no" as
4043 non-personal, in accordance with RFC 3834. (Previously it treated
4044 anything starting "auto-" as non-personal.)
4046 TF/01 The control=submission/name=... option had a problem with syntax
4047 errors if the name included a slash character. The /name= option
4048 now slurps the rest of the string, so it can include any characters
4049 but it must come last in the list of options (after /sender_retain
4052 PH/05 Some modifications to the interface to the fake nameserver for the new
4060 TK/01 Added the "success_on_redirect" address verification option. See
4061 NewStuff for rationale and an example.
4063 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4065 PH/02 Patch to exigrep to allow it to work on syslog lines.
4067 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4068 fread() to skip over the body file's header line, because in Cygwin the
4069 header line is locked and is inaccessible.
4071 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4072 co-exist for some time) to make it clear that it is the Exim ID that is
4073 referenced, not the Message-ID: header line.
4075 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4076 string_format() function, because snprintf() does not exist on all
4079 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4080 ${stat: expansion item.
4082 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4083 protocol synchronization error", to keep the pedants happy.
4085 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4086 well as for IRIX systems, when gcc is being used. See the host.c source
4089 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4091 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4094 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4095 transport and to the smtp transport in LMTP mode.
4097 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4099 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4100 run a filter in a subprocess. This could lead to confusion in subsequent
4101 lookups in the parent process. There should also be a search_tidyup() at
4102 the end of the subprocess.
4104 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4105 only if the host matched helo_try_verify_hosts, which caused the
4106 verification to occur when the EHLO/HELO command was issued. The ACL just
4107 tested the remembered result. Now, if a previous verification attempt has
4108 not happened, "verify = helo" does it there and then.
4110 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4112 TK/03 Fix log output including CR from clamd.
4114 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4115 exist provoked a memory error which could cause a segfault.
4117 PH/15 Installed PCRE 6.2
4119 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4121 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4122 of the problem. Specifically, suggested +O2 rather than +O1 for the
4125 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4127 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4128 record, the port was not correctly logged when the outgoing_port log
4129 selector was set (it logged the transort's default port).
4131 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4132 fallback_hosts, and "hosts" in the smtp transport.
4134 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4135 host errors such as "Connection refused".
4137 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4138 authentication with radiusclient 0.4.9:
4140 - Error returned from rc_read_config was caught wrongly
4141 - Username/password not passed on to radius server due to wrong length.
4143 The presumption is that some radiusclient API changes for 4.51/PH/17
4144 were not taken care of correctly. The code is still untested by me (my
4145 Linux distribution still has 0.3.2 of radiusclient), but it was
4146 contributed by a Radius user.
4148 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4149 expanding the "port" option of the smtp transport.
4151 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4152 while reading a MIME header. Thanks to Tom Hughes for a patch.
4154 PH/24 Include config.h inside local_scan.h so that configuration settings are
4157 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4158 that in an ACL for RCPT (for example), you can examine exactly what was
4161 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4162 commands, but it was not correctly comparing the address with the actual
4163 client host address. Thus, it would show the EHLO address in Received:
4164 header lines when this was not necessary.
4166 PH/27 Added the % operator to ${eval:}.
4168 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4169 it should be ignoring failures (because with -C, for example, it has lost
4170 privilege). It wasn't ignoring creation failures other than "already
4173 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4176 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4177 because an input line was too long, either on its own, or by virtue of
4178 too many continuations, the temporary file was not being removed, and the
4179 return code was incorrect.
4181 PH/31 Missing "BOOL" in function definition in filtertest.c.
4183 PH/32 Applied Sieve patches from the maintainer.
4185 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4187 PH/33 Added "verify = not_blind".
4189 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4190 Local/Makefile (with some defaults set). These are used in built scripts
4191 such as exicyclog, but they have never been used in the exim_install
4192 script (though there are many overriding facilities there). I have
4193 arranged that the exim_install script now takes note of these two
4196 PH/35 Installed configuration files for Dragonfly.
4198 PH/36 When a locally submitted message by a trusted user did not contain a
4199 From: header, and the sender address was obtained from -f or from an SMTP
4200 MAIL command, and the trusted user did not use -F to supply a sender
4201 name, $originator_name was incorrectly used when constructing a From:
4202 header. Furthermore, $originator_name was used for submission mode
4203 messages from external hosts without From: headers in a similar way,
4204 which is clearly wrong.
4206 PH/37 Added control=suppress_local_fixups.
4208 PH/38 When log_selector = +received_sender was set, and the addition of the
4209 sender made the log line's construction buffer exactly full, or one byte
4210 less than full, an overflow happened when the terminating "\n" was
4213 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4214 when the result of a list match is failure because a DNS lookup failed.
4216 PH/40 RM_COMMAND is now used in the building process.
4218 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4219 the "build-* directories that it finds.
4221 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4222 address in a domain literal was a prefix of an interface address.
4224 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4225 when verifying a sender address, unless rewrite_headers is false.
4227 PH/44 Wrote a long comment about why errors_to addresses are verified as
4228 recipients, not senders.
4230 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4231 the ratelimit ACL was added.
4233 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4235 PH/46 Added extra information about PostgreSQL errors to the error string.
4237 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4238 avoiding the need to install special zones in a real server. This is
4239 backwards compatible; if it can't find the fake resolver, it drops back.
4240 Thus, both old and new test suites can be run.
4242 TF/02 Added util/ratelimit.pl
4244 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4245 clock is set back in time.
4247 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4248 Candler <B.Candler@pobox.com>.
4250 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4251 OK for addresses that are the result of redirections.
4253 PH/48 A number of further additions for the benefit of the new test suite,
4254 including a fake gethostbyname() that interfaces to the fake DNS resolver
4257 TF/06 The fix for widen_domains has also been applied to qualify_single and
4258 search_parents which are the other dnslookup options that can cause
4261 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4264 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4266 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4267 service" if it encountered an MX record with an empty target hostname.
4268 The message is now "an MX or SRV record indicated no SMTP service".
4270 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4271 if the DNS of the sending site is misconfigured. This is quite a
4272 common situation. This change restores the behaviour of treating a
4273 helo verification defer as a failure.
4275 PH/51 If self=fail was set on a router, the bounce message did not include the
4276 actual error message.
4282 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4284 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4285 command itself ended in error, the underlying message about the transport
4286 filter timeout was being overwritten with the pipe command error. Now the
4287 underlying error message should be appended to the second error message.
4289 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4291 PH/02 Reduce the amount of output that "make" produces by default. Full output
4292 can still be requested.
4294 PH/03 The warning log line about a condition test deferring for a "warn" verb
4295 was being output only once per connection, rather than after each
4296 occurrence (because it was using the same function as for successful
4297 "warn" verbs). This seems wrong, so I have changed it.
4299 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4300 it should not have, which might have caused a crash in the right
4301 circumstances, but probably never did.
4303 PH/04 Installed a modified version of Tony Finch's patch to make submission
4304 mode fix the return path as well as the Sender: header line, and to
4305 add a /name= option so that you can make the user's friendly name appear
4308 TF/03 Added the control = fakedefer ACL modifier.
4310 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4311 Mark Lowes for thorough testing.
4313 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4315 TK/03 Merged latest SRS patch from Miles Wilton.
4317 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4318 with the definition in sysexits.h (which is #included earlier).
4319 Fortunately, Exim does not actually use EX_OK. The code used to try to
4320 preserve the sysexits.h value, by assuming that macro definitions were
4321 scanned for macro replacements. I have been disabused of this notion,
4322 so now the code just undefines EX_OK before #including unistd.h.
4324 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4325 in the smtp transport. When a block could not be written in a single
4326 write() function, the timeout was being re-applied to each part-write.
4327 This seems wrong - if the receiver was accepting one byte at a time it
4328 would take for ever. The timeout is now adjusted when this happens. It
4329 doesn't have to be particularly precise.
4331 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4332 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4334 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4335 without a domain if the check to <postmaster@domain> fails.
4337 SC/01 Eximstats: added -xls and the ability to specify output files
4338 (patch written by Frank Heydlauf).
4340 SC/02 Eximstats: use FileHandles for outputting results.
4342 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4344 SC/04 Eximstats: fixed display of large numbers with -nvr option
4346 SC/05 Eximstats: fixed merging of reports with empty tables.
4348 SC/06 Eximstats: added the -include_original_destination flag
4350 SC/07 Eximstats: removed tabs and trailing whitespace.
4352 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4354 TK/06 MBOX spool code: Add real "From " MBOX separator line
4355 so the .eml file is really in mbox format (even though
4356 most programs do not really care). Patch from Alex Miller.
4358 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4359 The latter is generated from $received_to and is only set if the
4360 message has one envelope recipient. SA can use these headers,
4361 obviously out-of-the-box. Patch from Alex Miller.
4363 PH/08 The ${def test on a variable was returning false if the variable's
4364 value was "0", contrary to what the specification has always said!
4365 The result should be true unless the variable is empty.
4367 PH/09 The syntax error of a character other than { following "${if
4368 def:variable_name" (after optional whitespace) was not being diagnosed.
4369 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4370 accidental colon was present, for example, could give incorrect results.
4372 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4373 result is used (not including appendfile, where other changes are about
4376 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4377 This involved changing a lot of size variables from int to off_t. It
4378 should work with maildirs and everything.
4380 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4381 spamd dying while we are connected to it.
4383 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4386 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4387 function for BDB 4.3.
4389 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4391 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4392 the sources for PCRE have been re-arranged and more files are now
4395 PH/15 The code I had for printing potentially long long variables in PH/11
4396 above was not the best (it lost precision). The length of off_t variables
4397 is now inspected at build time, and an appropriate printing format (%ld
4398 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4399 to be "long long int" or "long int". This is needed for the internal
4400 formatting function string_vformat().
4402 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4403 the configuration file to be ":syslog", then the script "guesses" where
4404 the logs files are, rather than using the compiled in default. In our
4405 case the guess is not the same as the compiled default, so the script
4406 suddenly stopped working when I started to use syslog. The patch checks
4407 to see if log_file_path is "". If so, it attempts to read it from exim
4408 with no configuration file to get the compiled in version, before it
4409 falls back to the previous guessing code."
4411 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4412 implementing BATV in an Exim configuration. See NewStuff for the gory
4415 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4416 Makefile that are specific to HP-UX.
4418 PH/18 If the "use_postmaster" option was set for a recipient callout together
4419 with the "random" option, the postmaster address was used as the MAIL
4420 FROM address for the random test, but not for the subsequent recipient
4421 test. It is now used for both.
4423 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4424 patch removes a few documentation additions to RFC 3028, because the
4425 latest draft now contains them. It adds the new en;ascii-case comparator
4426 and a new error check for 8bit text in MIME parts. Comparator and
4427 require names are now matched exactly. I enabled the subaddress
4428 extension, but it is not well tested yet (read: it works for me)."
4430 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4431 rework some of the code of TK/09 above to avoid the hardwired use of
4432 "%lld" and "long long". Replaced the call to snprintf() with a call to
4435 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4436 records point to non-existent hosts", "retry timeout exceeded", and
4437 "retry time not reached for any host after a long failure period".
4439 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4440 experimental DomainKeys support:
4442 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4443 (2) On an error such as an illegally used "control", the wrong name for
4444 the control was given.
4446 These problems did NOT occur unless DomainKeys support was compiled.
4448 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4450 PH/24 Added ${if match_ip condition.
4452 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4453 databases so that it will be absolutely obvious if a crash occurs in the
4454 DB library. This is a regular occurrence (often caused by mis-matched
4457 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4458 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4459 picked up on a user's system that detects such things. There doesn't seem
4460 to be a gcc warning option for this - only an attribute that has to be
4461 put on the function's prototype. It seems that in Fedora Core 4 they have
4462 set this on a number of new functions. No doubt there will be more in due
4465 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4466 specify a transport. However, if an address that was verified by such a
4467 router was the subject of a callout, Exim crashed because it tried to
4468 read the rcpt_include_affixes from the non-existent transport. Now it
4469 just assumes that the setting of that option is false. This bug was
4470 introduced by 4.51/PH/31.
4472 PH/28 Changed -d+all to exclude +memory, because that information is very
4473 rarely of interest, but it makes the output a lot bigger. People tend to
4474 do -d+all out of habit.
4476 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4477 code in os-type was giving problems when libc.so lives in lib64, like on
4480 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4481 aren't the modern standard, and it seems that some systems' include files
4482 don't always have them. Exim was already checking for some of the newer
4483 ones like T_AAAA, and defining it itself. I've added checks for all the
4484 record types that Exim uses.
4486 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4487 not automatically generating a new one, as it is supposed to. This
4488 prevented TLS from working. If the file did exist, but contained invalid
4489 data, a new version was generated, as expected. It was only the case of a
4490 non-existent file that was broken.
4492 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4493 with a change in libdomainkeys > 0.64.
4495 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4496 from DNS. If the selector record carries the flag, it now has
4497 precedence over the domain-wide flag.
4499 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4501 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4502 the use of a port name that isn't defined in /etc/services) occurred, the
4503 message was deferred as in a normal delivery, and thus remained on the
4504 spool, instead of being failed because of the mua_wrapper setting. This
4505 is now fixed, and I tidied up some of the mua_wrapper messages at the
4508 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4509 the messages in a hash of arrays rather than using individual hashes.
4510 This is a bit cleaner and results in dramatic memory savings, albeit
4511 at a slight CPU cost.
4513 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4514 as requested by Marc Sherman.
4516 SC/10 Eximstats: added histograms for user specified patterns as requested
4519 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4521 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4522 fopen() in the content-scanning modules that did not already have it.
4528 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4529 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4531 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4533 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4535 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4536 to test Sieve filters that use "vacation".
4538 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4539 that changes the way the GnuTLS parameters are stored in the cache file.
4540 The new format can be generated externally. For backward compatibility,
4541 if the data in the cache doesn't make sense, Exim assumes it has read an
4542 old-format file, and it generates new data and writes a new file. This
4543 means that you can't go back to an older release without removing the
4546 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4547 work if there are any delivery delays because "one_time" forces the
4548 parent to be marked "delivered", so its unseen clone is never tried
4549 again. For this reason, Exim now forbids the simultaneous setting of
4552 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4553 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4554 entry if you want to know the details. The fix, however, neglected to
4555 consider the case when local delivery batching is involved. The test for
4556 "previously delivered" was not happening when checking to see if an
4557 address could be batched with a previous (undelivered) one; under
4558 certain circumstances this could lead to multiple deliveries to the same
4561 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4562 in its include files, and this causes problems building Exim.
4564 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4565 header_syntax) but Exim was just ignoring anything given after a slash.
4566 In particular, this caused confusion with an attempt to use "verify =
4567 reverse_host_lookup/defer_ok". An error is now given when options are
4568 supplied for verify items that do not have them. (Maybe reverse_host_
4569 lookup should have a defer_ok option, but that's a different point.)
4571 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4572 defined by RFC 821) to 2048, because there were problems with some AUTH
4573 commands, and RFC 1869 says the size should be increased for extended
4574 SMTP commands that take arguments.
4576 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4579 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4580 "unknown" error; now it says that the functionality isn't in the binary.
4582 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4583 an address' error message when a string expansion fails (syntax or
4584 whatever). Otherwise the password may appear in the log. Following change
4585 PH/42 below, there is no longer a chance of it appearing in a bounce
4588 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4590 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4591 of its addresses was ever tried. (Bugzilla bug #2.)
4593 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4594 the result incorrectly in the debug output. (It correctly added a newline
4595 to what was transported.)
4597 TF/01 Added $received_time.
4599 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4600 commented out examples of how to interface to a virus scanner and to
4601 SpamAssassin. Also added commented examples of av_scanner and
4602 spamd_address settings.
4604 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4605 and controls are allowed in which ACLs. There were a couple of minor
4606 errors. Some of the entries in the conditions table (which is a table of
4607 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4608 negation of where the condition IS allowed.
4610 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4612 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4613 header file does not have a version number, so I've had to invent a new
4614 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4615 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4616 radiusclient), but it was contributed by a Radius user.
4618 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4619 files or directories, for OpenSSL.
4621 PH/19 When an Exim process that is running as root has to create an Exim log
4622 file, it does so in a subprocess that runs as exim:exim so as to get the
4623 ownership right at creation (otherwise, other Exim processes might see
4624 the file with the wrong ownership). There was no test for failure of this
4625 fork() call, which would lead to the process getting stuck as it waited
4626 for a non-existent subprocess. Forks do occasionally fail when resources
4627 run out. I reviewed all the other calls to fork(); they all seem to check
4630 PH/20 When checking for unexpected SMTP input at connect time (before writing
4631 the banner), Exim was not dealing correctly with a non-positive return
4632 from the read() function. If the client had disconnected by this time,
4633 the result was a log entry for a synchronization error with an empty
4634 string after "input=" when read() returned zero. If read() returned -1
4635 (an event I could not check), uninitialized data bytes were printed.
4636 There were reports of junk text (parts of files, etc) appearing after
4639 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4641 PH/22 Added support for macro redefinition, and (re)definition in between
4642 driver and ACL definitions.
4644 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4645 forgetting to use the resulting value; it was using the unexpanded value.
4647 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4648 hadn't been configured. The fix is from Juergen Kreileder, who
4649 understands it better than I do:
4651 "Here's what I see happening with three configured cyrus_sasl
4652 authenticators configured (plain, login, cram-md5):
4654 On startup auth_cyrus_sasl_init() gets called for each of these.
4655 This means three calls to sasl_listmech() without a specified mech_list.
4656 => SASL tests which mechs of all available mechs actually work
4657 => three warnings about OTP not working
4658 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4660 With the patch, sasl_listmech() also gets called three times. But now
4661 SASL's mech_list option is set to the server_mech specified in the the
4662 authenticator. Or in other words, the answer from sasl_listmech()
4663 gets limited to just the mech you're testing for (which is different
4665 => the return list contains just 'plain' or 'login', 'cram-md5' or
4666 nothing depending on the value of ob->server_mech.
4668 I've just tested the patch: Authentication still works fine,
4669 unavailable mechs specified in the exim configuration are still
4670 caught, and the auth.log warnings about OTP are gone."
4672 PH/25 When debugging is enabled, the contents of the command line are added
4673 to the debugging output, even when log_selector=+arguments is not
4676 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4677 answer is "GNU", and only if the return is "GNU/something" is the answer
4680 PH/27 $acl_verify_message is now set immediately after the failure of a
4681 verification in an ACL, and so is available in subsequent modifiers. In
4682 particular, the message can be preserved by coding like this:
4684 warn !verify = sender
4685 set acl_m0 = $acl_verify_message
4687 Previously, $acl_verify_message was set only while expanding "message"
4688 and "log_message" when a very denied access.
4690 PH/28 Modified OS/os.c-Linux with
4692 -#ifndef OS_LOAD_AVERAGE
4693 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4695 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4696 nomenclature these days.)
4698 PH/29 Installed patch from the Sieve maintainer that adds the options
4699 sieve_useraddress and sieve_subaddress to the redirect router.
4701 PH/30 In these circumstances:
4702 . Two addresses routed to the same list of hosts;
4703 . First host does not offer TLS;
4704 . First host accepts first address;
4705 . First host gives temporary error to second address;
4706 . Second host offers TLS and a TLS session is established;
4707 . Second host accepts second address.
4708 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4709 and peerdn, if requested) that were in fact used only for the second
4712 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4713 attention to any local part prefix or suffix that was matched by the
4714 router that accepted the address. It now behaves in the same way as it
4715 does for delivery: the affixes are removed from the local part unless
4716 rcpt_include_affixes is set on the transport.
4718 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4719 timeout during the DATA phase of an incoming message.
4721 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4722 applied a patch sanctioned by the Sieve maintainer.
4724 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4725 the uid or gid is negative. A case of a negative gid caused this to be
4726 noticed. The fix allows for either to be negative.
4728 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4729 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4732 PH/36 The change PH/12 above was broken. Fixed it.
4734 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4735 the grounds that routing the same address twice would always produce the
4736 same answer. This might have been true once, but it is certainly no
4737 longer true now. Routing a child address may depend on the previous
4738 routing that produced that child. Some complicated redirection strategies
4739 went wrong when messages had multiple recipients, and made Exim's
4740 behaviour dependent on the order in which the addresses were given.
4742 I have moved the duplicate checking until after the routing is complete.
4743 Exim scans the addresses that are assigned to local and remote
4744 transports, and removes any duplicates. This means that more work will be
4745 done, as duplicates will always all be routed, but duplicates are
4746 presumably rare, so I don't expect this is of any significance.
4748 For deliveries to pipes, files, and autoreplies, the duplicate checking
4749 still happens during the routing process, since they are not going to be
4752 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4753 It corrects a timeout issue with spamd. This is Ian's comment: "The
4754 background is that sometimes spamd either never reads data from a
4755 connection it has accepted, or it never writes response data. The exiscan
4756 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4757 blindly assumes that writes won't block so it may never time out."
4759 PH/39 Allow G after quota size as well as K and M.
4761 PH/40 The value set for $authenticated_id in an authenticator may not contain
4762 binary zeroes or newlines because the value is written to log lines and
4763 to spool files. There was no check on this. Now the value is run through
4764 the string_printing() function so that such characters are converted to
4765 printable escape sequences.
4767 PH/41 $message_linecount is a new variable that contains the total number of
4768 lines in the message. Compare $body_linecount, which is the count for the
4771 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4772 bounce and delay warning messages, except in certain special cases, which
4775 (a) An SMTP error message from a remote host;
4776 (b) A message specified in a :fail: redirection;
4777 (c) A message specified in a "fail" command in a system filter;
4778 (d) A message specified in a FAIL return from the queryprogram router;
4779 (e) A message specified by the cannot_route_message router option.
4781 In these cases only, Exim does include the error details in bounce and
4782 warning messages. There are also a few cases where bland messages such
4783 as "unrouteable address" or "local delivery error" are given.
4785 PH/43 $value is now also set for the "else" part of a ${run expansion.
4787 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4788 being worked on, but at least Exim now implements the latest version to
4791 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4792 process to complete was treated as a delivery failure, a timeout while
4793 writing the message to the pipe was logged, but erroneously treated as a
4794 successful delivery. Such timeouts include transport filter timeouts. For
4795 consistency with the overall process timeout, these timeouts are now
4796 treated as errors, giving rise to delivery failures by default. However,
4797 there is now a new Boolean option for the pipe transport called
4798 timeout_defer, which, if set TRUE, converts the failures into defers for
4799 both kinds of timeout. A transport filter timeout is now identified in
4802 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4803 systems where "make" and "gmake" are different, calling "gmake" at top
4804 level broke things. I've arranged for the value of $(MAKE) to be passed
4805 from the Makefile to this script so that it can call the same version of
4809 A note about Exim versions 4.44 and 4.50
4810 ----------------------------------------
4812 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4813 changes of various kinds. As a consequence, a big documentation update was
4814 needed. This delayed the release for rather longer than seemed good, especially
4815 in the light of a couple of (minor) security issues. Therefore, the changes
4816 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4817 release. So 4.44 and 4.50 are in effect two different branches that both start
4820 I have left the 4.50 change log unchanged; it contains all the changes since
4821 4.43. The change log for 4.44 is below; many of its items are identical to
4822 those for 4.50. This seems to be the most sensible way to preserve the
4823 historical information.
4829 1. Minor wording change to the doc/README.SIEVE file.
4831 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4832 computation of the current number of files was incorrect.
4834 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4835 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4838 4. Give more explanation in the error message when the command for a transport
4839 filter fails to execute.
4841 5. There are several places where Exim runs a non-Exim command in a
4842 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4843 was being done only for the command run by the queryprogram router. It is
4844 now done for all such subprocesses. The other cases are: ${run, transport
4845 filters, and the commands run by the lmtp and pipe transports.
4847 6. Added CONFIGURE_GROUP build-time option.
4849 7. Some older OS have a limit of 256 on the maximum number of file
4850 descriptors. Exim was using setrlimit() to set 1000 as a large value
4851 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4852 systems. I've change it so that if it can't get 1000, it tries for 256.
4854 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4855 was an oversight, and furthermore, ever since the addition of extra
4856 controls (e.g. 4.43/32), the checks on when to allow different forms of
4857 "control" were broken. There should now be diagnostics for all cases when a
4858 control that does not make sense is encountered.
4860 9. Added the /retain_sender option to "control=submission".
4862 10. $recipients is now available in the predata ACL (oversight).
4864 11. Tidy the search cache before the fork to do a delivery from a message
4865 received from the command line. Otherwise the child will trigger a lookup
4866 failure and thereby defer the delivery if it tries to use (for example) a
4867 cached ldap connection that the parent has called unbind on.
4869 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4870 of $address_data from the recipient verification was clobbered by the
4871 sender verification.
4873 13. The value of address_data from a sender verification is now available in
4874 $sender_address_data in subsequent conditions in the ACL statement.
4876 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4878 15. Added a new option "connect=<time>" to callout options, to set a different
4881 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4882 was its contents. (It was OK if the option was not defined at all.)
4884 17. A "Completed" log line is now written for messages that are removed from
4885 the spool by the -Mrm option.
4887 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4888 information about exactly what failed.
4890 19. Added -dd to debug only the daemon process.
4892 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4893 handles timeouts, both on the server side and network timeouts. Renamed the
4894 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4896 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4897 It is now set to "smtps".
4899 22. $host_address is now set to the target address during the checking of
4900 ignore_target_hosts.
4902 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4903 being passed; this would have caused $sender_host_name to have been used if
4904 matching the list had actually called for a host name (not very likely,
4905 since this list is usually IP addresses). A host name is now passed as
4908 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4909 code that specifies a non-restarting handler (typically sigaction() in
4910 modern systems) in an attempt to fix a rare and obscure crash bug.
4912 25. Narrowed the window for a race in the daemon that could cause it to ignore
4913 SIGCHLD signals. This is not a major problem, because they are used only to
4914 wake it up if nothing else does.
4916 26. A malformed maildirsize file could cause Exim to calculate negative values
4917 for the mailbox size or file count. Odd effects could occur as a result.
4918 The maildirsize information is now recalculated if the size or filecount
4921 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4922 support for a long time. Removed HAVE_SYS_VFS_H.
4924 28. Installed the latest version of exipick from John Jetmore.
4926 29. In an address list, if the pattern was not a regular expression, an empty
4927 subject address (from a bounce message) matched only if the pattern was an
4928 empty string. Non-empty patterns were not even tested. This was the wrong
4929 because it is perfectly reasonable to use an empty address as part of a
4930 database query. An empty address is now tested by patterns that are
4931 lookups. However, all the other forms of pattern expect the subject to
4932 contain a local part and a domain, and therefore, for them, an empty
4933 address still always fails if the pattern is not itself empty.
4935 30. Exim went into a mad DNS loop when attempting to do a callout where the
4936 host was specified on an smtp transport, and looking it up yielded more
4937 than one IP address.
4939 31. Re-factored the code for checking spool and log partition space into a
4940 function that finds that data and another that does the check. The former
4941 is then used to implement four new variables: $spool_space, $log_space,
4942 $spool_inodes, and $log_inodes.
4944 32. The RFC2047 encoding function was originally intended for short strings
4945 such as real names; it was not keeping to the 75-character limit for
4946 encoded words that the RFC imposes. It now respects the limit, and
4947 generates multiple encoded words if necessary. To be on the safe side, I
4948 have increased the buffer size for the ${rfc2047: expansion operator from
4951 33. It is now permitted to omit both strings after an "if" condition; if the
4952 condition is true, the result is "true". As before, when the second string
4953 is omitted, a false condition yields an empty string. This makes it less
4954 cumbersome to write custom ACL and router conditions.
4956 34. Failure to deliver a bounce message always caused it to be frozen, even if
4957 there was an errors_to setting on the router. The errors_to setting is now
4960 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4961 canonical form (fully expanded) before being placed in
4962 $sender_host_address.
4964 36. The table in the code that translates DNS record types into text (T_A to
4965 "A" for instance) was missing entries for NS and CNAME. It is just possible
4966 that this could have caused confusion if both these types were looked up
4967 for the same domain, because the text type is used as part of Exim's
4968 per-process caching. But the chance of anyone hitting this buglet seems
4971 37. The dnsdb lookup has been extended in a number of ways.
4973 (1) There is a new type, "zns", which walks up the domain tree until it
4974 finds some nameserver records. It should be used with care.
4976 (2) There is a new type, "mxh", which is like "mx" except that it returns
4977 just the host names, not the priorities.
4979 (3) It is now possible to give a list of domains (or IP addresses) to be
4980 looked up. The behaviour when one of the lookups defers can be
4981 controlled by a keyword.
4983 (4) It is now possible to specify the separator character for use when
4984 multiple records are returned.
4986 38. The dnslists ACL condition has been extended: it is now possible to supply
4987 a list of IP addresses and/or domains to be looked up in a particular DNS
4990 39. Added log_selector=+queue_time_overall.
4992 40. When running the queue in the test harness, wait just a tad after forking a
4993 delivery process, to get repeatability of debugging output.
4995 41. Include certificate and key file names in error message when GnuTLS fails
4996 to set them up, because the GnuTLS error message doesn't include the name
4997 of the failing file when there is a problem reading it.
4999 42. Allow both -bf and -bF in the same test run.
5001 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5003 44. The "Exiscan patch" is now merged into the mainline Exim source.
5005 45. Sometimes the final signoff response after QUIT could fail to get
5006 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5007 < 0 before doing a fflush(). This bug looks as though it goes back to the
5008 introduction of TLS in release 3.20, but "sometimes" must have been rare
5009 because the tests only now provoked it.
5011 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5012 (this can affect the format of dates).
5014 47. exim_tidydb, when checking for the continued existence of a message for
5015 which it has found a message-specific retry record, was not finding
5016 messages that were in split spool directories. Consequently, it was
5017 deleting retry records that should have stayed in existence.
5019 48. Steve fixed some bugs in eximstats.
5021 49. The SPA authentication driver was not abandoning authentication and moving
5022 on to the next authenticator when an expansion was forced to fail,
5023 contradicting the general specification for all authenticators. Instead it
5024 was generating a temporary error. It now behaves as specified.
5026 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5027 (the order specifies the preference for clients). The order is now AES256,
5028 AES128, 3DES, ARCFOUR128.
5030 51. Small patch to Sieve code - explicitly set From: when generating an
5033 52. Exim crashed if a remote delivery caused a very long error message to be
5034 recorded - for instance if somebody sent an entire SpamAssassin report back
5035 as a large number of 550 error lines. This bug was coincidentally fixed by
5036 increasing the size of one of Exim's internal buffers (big_buffer) that
5037 happened as part of the Exiscan merge. However, to be on the safe side, I
5038 have made the code more robust (and fixed the comments that describe what
5041 53. Now that there can be additional text after "Completed" in log lines (if
5042 the queue_time_overall log selector is set), a one-byte patch to exigrep
5043 was needed to allow it to recognize "Completed" as not the last thing in
5046 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5047 patch that reportedly fixes this has been added. I am not expert enough to
5048 create a test for it. This is what the patch creator wrote:
5050 "I found a little strange behaviour of ldap code when working with
5051 Windows 2003 AD Domain, where users was placed in more than one
5052 Organization Units. When I tried to give exim partial DN, the exit code
5053 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5054 But simultaneously result of request was absolutely normal ldap result,
5055 so I produce this patch..."
5057 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5058 REFERENCE, so I have modified the code to exclude the patch when that macro
5061 55. Some experimental protocols are using DNS PTR records for new purposes. The
5062 keys for these records are domain names, not reversed IP addresses. The
5063 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5064 leaves it alone. Component reversal etc. now happens only for IP addresses.
5067 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5069 57. Double the size of the debug message buffer (to 2048) so that more of very
5070 long debug lines gets shown.
5072 58. The exicyclog utility now does better if the number of log files to keep
5073 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5075 59. Two changes related to the smtp_active_hostname option:
5077 (1) $smtp_active_hostname is now available as a variable.
5078 (2) The default for smtp_banner uses $smtp_active_hostname instead
5079 of $primary_hostname.
5081 60. The host_aton() function is supposed to be passed a string that is known
5082 to be a valid IP address. However, in the case of IPv6 addresses, it was
5083 not checking this. This is a hostage to fortune. Exim now panics and dies
5084 if the condition is not met. A case was found where this could be provoked
5085 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5086 components; fortuitously, this particular loophole had already been fixed
5087 by change 4.50/55 above.
5089 If there are any other similar loopholes, the new check in host_aton()
5090 itself should stop them being exploited. The report I received stated that
5091 data on the command line could provoke the exploit when Exim was running as
5092 exim, but did not say which command line option was involved. All I could
5093 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5094 running as the user.
5097 61. There was a buffer overflow vulnerability in the SPA authentication code
5098 (which came originally from the Samba project). I have added a test to the
5099 spa_base64_to_bits() function which I hope fixes it.
5102 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5103 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5105 63. The daemon start-up calls getloadavg() while still root for those OS that
5106 need the first call to be done as root, but it missed one case: when
5107 deliver_queue_load_max is set with deliver_drop_privilege. This is
5108 necessary for the benefit of the queue runner, because there is no re-exec
5109 when deliver_drop_privilege is set.
5111 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5112 This has been fixed.
5114 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5115 was in use, was not putting the data itself into the right store pool;
5116 consequently, it could be overwritten for a subsequent message in the same
5117 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5120 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5122 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5123 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5124 the function were treating the return as a boolean value, which happened to
5125 work because 0=false and not-0=true, but is not correct code.
5127 68. The host_aton() function was not handling scoped IPv6 addresses (those
5128 with, for example, "%eth0" on the end) correctly.
5130 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5131 negated items (that is, ~something) in unsigned ints. Some compilers
5132 apparently mutter when there is no cast.
5134 70. If an address verification called from an ACL failed, and did not produce a
5135 user-specific message (i.e. there was only a "system" message), nothing was
5136 put in $acl_verify_message. In this situation, it now puts the system
5139 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5140 session; change 4.31/43 added the unwanted input to the log line - except
5141 that it did not do this in the start of session case. It now does.
5143 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5144 This is wrong and can cause the other end to generate a synchronization
5145 error if it is another Exim or anything else that does the synchronization
5146 check. A QUIT command is no longer sent after a timeout.
5148 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5149 during host lookups.
5151 74. The defer_ok option of callout verification was not working if it was used
5152 when verifying addresses in header lines, that is, for this case:
5154 verify = header_sender/callout=defer_ok
5156 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5157 those file descriptors could be used for SMTP connections. If anything
5158 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5159 could be sent to the SMTP client, causing chaos. The daemon now opens
5160 stdin, stdout, and stderr to /dev/null when it puts itself into the
5163 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5164 log by default. The user can override this with suitable Perl magic.
5166 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5167 the log message when discard triggers, was not working for the DATA ACL or
5168 for the non-SMTP ACL.
5170 78. Error message wording change in sieve.c.
5172 79. If smtp_accept_max_per_host was set, the number of connections could be
5173 restricted to fewer than expected, because the daemon was trying to set up
5174 a new connection before checking whether the processes handling previous
5175 connections had finished. The check for completed processes is now done
5176 earlier. On busy systems, this bug wouldn't be noticed because something
5177 else would have woken the daemon, and it would have reaped the completed
5180 80. If a message was submitted locally by a user whose login name contained one
5181 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5182 It caused a spool format error. I have fixed the spool reading code. A
5183 related problem was that the "from" clause in the Received: line became
5184 illegal because of the space(s). It is now covered by ${quote_local_part.
5186 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5189 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5191 83. Patch from Sieve maintainer to fix unterminated string problem in
5192 "vacation" handling.
5194 84. Some minor changes to the Linux configuration files to help with other
5195 OS variants using glibc.
5197 85. One more patch for Sieve to update vacation handling to latest spec.
5200 ----------------------------------------------------
5201 See the note above about the 4.44 and 4.50 releases.
5202 ----------------------------------------------------
5208 1. Change 4.43/35 introduced a bug that caused file counts to be
5209 incorrectly computed when quota_filecount was set in an appendfile
5212 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5213 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5216 3. Give more explanation in the error message when the command for a transport
5217 filter fails to execute.
5219 4. There are several places where Exim runs a non-Exim command in a
5220 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5221 was being done only for the command run by the queryprogram router. It is
5222 now done for all such subprocesses. The other cases are: ${run, transport
5223 filters, and the commands run by the lmtp and pipe transports.
5225 5. Some older OS have a limit of 256 on the maximum number of file
5226 descriptors. Exim was using setrlimit() to set 1000 as a large value
5227 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5228 systems. I've change it so that if it can't get 1000, it tries for 256.
5230 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5231 was an oversight, and furthermore, ever since the addition of extra
5232 controls (e.g. 4.43/32), the checks on when to allow different forms of
5233 "control" were broken. There should now be diagnostics for all cases when a
5234 control that does not make sense is encountered.
5236 7. $recipients is now available in the predata ACL (oversight).
5238 8. Tidy the search cache before the fork to do a delivery from a message
5239 received from the command line. Otherwise the child will trigger a lookup
5240 failure and thereby defer the delivery if it tries to use (for example) a
5241 cached ldap connection that the parent has called unbind on.
5243 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5244 of $address_data from the recipient verification was clobbered by the
5245 sender verification.
5247 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5248 was its contents. (It was OK if the option was not defined at all.)
5250 11. A "Completed" log line is now written for messages that are removed from
5251 the spool by the -Mrm option.
5253 12. $host_address is now set to the target address during the checking of
5254 ignore_target_hosts.
5256 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5257 being passed; this would have caused $sender_host_name to have been used if
5258 matching the list had actually called for a host name (not very likely,
5259 since this list is usually IP addresses). A host name is now passed as
5262 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5263 code that specifies a non-restarting handler (typically sigaction() in
5264 modern systems) in an attempt to fix a rare and obscure crash bug.
5266 15. Narrowed the window for a race in the daemon that could cause it to ignore
5267 SIGCHLD signals. This is not a major problem, because they are used only to
5268 wake it up if nothing else does.
5270 16. A malformed maildirsize file could cause Exim to calculate negative values
5271 for the mailbox size or file count. Odd effects could occur as a result.
5272 The maildirsize information is now recalculated if the size or filecount
5275 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5276 support for a long time. Removed HAVE_SYS_VFS_H.
5278 18. Updated exipick to current release from John Jetmore.
5280 19. Allow an empty sender to be matched against a lookup in an address list.
5281 Previously the only cases considered were a regular expression, or an
5284 20. Exim went into a mad DNS lookup loop when doing a callout where the
5285 host was specified on the transport, if the DNS lookup yielded more than
5288 21. The RFC2047 encoding function was originally intended for short strings
5289 such as real names; it was not keeping to the 75-character limit for
5290 encoded words that the RFC imposes. It now respects the limit, and
5291 generates multiple encoded words if necessary. To be on the safe side, I
5292 have increased the buffer size for the ${rfc2047: expansion operator from
5295 22. Failure to deliver a bounce message always caused it to be frozen, even if
5296 there was an errors_to setting on the router. The errors_to setting is now
5299 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5300 canonical form (fully expanded) before being placed in
5301 $sender_host_address.
5303 24. Updated eximstats to version 1.33
5305 25. Include certificate and key file names in error message when GnuTLS fails
5306 to set them up, because the GnuTLS error message doesn't include the name
5307 of the failing file when there is a problem reading it.
5309 26. Expand error message when OpenSSL has problems setting up cert/key files.
5312 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5313 (this can affect the format of dates).
5315 28. exim_tidydb, when checking for the continued existence of a message for
5316 which it has found a message-specific retry record, was not finding
5317 messages that were in split spool directories. Consequently, it was
5318 deleting retry records that should have stayed in existence.
5320 29. eximstats updated to version 1.35
5321 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5322 1.35 - bugfix such that pie charts by volume are generated correctly
5324 30. The SPA authentication driver was not abandoning authentication and moving
5325 on to the next authenticator when an expansion was forced to fail,
5326 contradicting the general specification for all authenticators. Instead it
5327 was generating a temporary error. It now behaves as specified.
5329 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5330 (the order specifies the preference for clients). The order is now AES256,
5331 AES128, 3DES, ARCFOUR128.
5333 31. Small patch to Sieve code - explicitly set From: when generating an
5336 32. Exim crashed if a remote delivery caused a very long error message to be
5337 recorded - for instance if somebody sent an entire SpamAssassin report back
5338 as a large number of 550 error lines. This bug was coincidentally fixed by
5339 increasing the size of one of Exim's internal buffers (big_buffer) that
5340 happened as part of the Exiscan merge. However, to be on the safe side, I
5341 have made the code more robust (and fixed the comments that describe what
5344 33. Some experimental protocols are using DNS PTR records for new purposes. The
5345 keys for these records are domain names, not reversed IP addresses. The
5346 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5347 leaves it alone. Component reversal etc. now happens only for IP addresses.
5350 34. The host_aton() function is supposed to be passed a string that is known
5351 to be a valid IP address. However, in the case of IPv6 addresses, it was
5352 not checking this. This is a hostage to fortune. Exim now panics and dies
5353 if the condition is not met. A case was found where this could be provoked
5354 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5355 components; fortuitously, this particular loophole had already been fixed
5356 by change 4.50/55 or 4.44/33 above.
5358 If there are any other similar loopholes, the new check in host_aton()
5359 itself should stop them being exploited. The report I received stated that
5360 data on the command line could provoke the exploit when Exim was running as
5361 exim, but did not say which command line option was involved. All I could
5362 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5363 running as the user.
5366 35. There was a buffer overflow vulnerability in the SPA authentication code
5367 (which came originally from the Samba project). I have added a test to the
5368 spa_base64_to_bits() function which I hope fixes it.
5371 36. The daemon start-up calls getloadavg() while still root for those OS that
5372 need the first call to be done as root, but it missed one case: when
5373 deliver_queue_load_max is set with deliver_drop_privilege. This is
5374 necessary for the benefit of the queue runner, because there is no re-exec
5375 when deliver_drop_privilege is set.
5377 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5378 was in use, was not putting the data itself into the right store pool;
5379 consequently, it could be overwritten for a subsequent message in the same
5380 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5383 38. Sometimes the final signoff response after QUIT could fail to get
5384 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5385 < 0 before doing a fflush(). This bug looks as though it goes back to the
5386 introduction of TLS in release 3.20, but "sometimes" must have been rare
5387 because the tests only now provoked it.
5393 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5394 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5395 Now it returns an integer. A number of calls were still expecting a T/F
5396 return. Fortuitously, in all cases, the tests worked in OK situations,
5397 which is the norm. However, things would have gone wrong on any write
5398 failures on the smtp file descriptor. This function is used when sending
5399 messages over SMTP and also when doing verify callouts.
5401 2. When Exim is called to do synchronous delivery of a locally submitted
5402 message (the -odf or -odi options), it no longer closes stderr before doing
5405 3. Implemented the mua_wrapper option.
5407 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5409 5. Implemented the functions header_remove(), header_testname(),
5410 header_add_at_position(), and receive_remove_recipient(), and exported them
5413 6. If an ACL "warn" statement specified the addition of headers, Exim already
5414 inserted X-ACL-Warn: at the start if there was no header name. However, it
5415 was not making this test for the second and subsequent header lines if
5416 there were newlines in the string. This meant that an invalid header could
5417 be inserted if Exim was badly configured.
5419 7. Allow an ACL "warn" statement to add header lines at the start or after all
5420 the Received: headers, as well as at the end.
5422 8. Added the rcpt_4xx retry error code.
5424 9. Added postmaster_mailfrom=xxx to callout verification option.
5426 10. Added mailfrom=xxxx to the callout verification option, for verify=
5429 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5430 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5432 12. Inserted some casts to stop certain compilers warning when using pointer
5433 differences as field lengths or precisions in printf-type calls (mostly
5434 affecting debugging statements).
5436 13. Added optional readline() support for -be (dynamically loaded).
5438 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5439 same clock tick as a message's arrival, so that its received time was the
5440 same as the "first fail" time on the retry record, and that message
5441 remained on the queue past the ultimate address timeout, every queue runner
5442 would try a delivery (because it was past the ultimate address timeout) but
5443 after another failure, the ultimate address timeout, which should have then
5444 bounced the address, did not kick in. This was a "< instead of <=" error;
5445 in most cases the first failure would have been in the next clock tick
5446 after the received time, and all would be well.
5448 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5449 being recognized when the domain list was tested by the match_domain
5450 condition in an expansion string.
5452 16. Added the ${str2b64: operator.
5454 17. Exim was always calling setrlimit() to set a large limit for the number of
5455 processes, without checking whether the existing limit was already
5456 adequate. (It did check for the limit on file descriptors.) Furthermore,
5457 errors from getrlimit() and setrlimit() were being ignored. Now they are
5458 logged to the main and panic logs, but Exim does carry on, to try to do its
5459 job under whatever limits there are.
5461 18. Imported PCRE 5.0.
5463 19. Trivial typo in log message " temporarily refused connection" (the leading
5466 20. If the log selector return_path_on_delivery was set and an address was
5467 redirected to /dev/null, the delivery process crashed because it assumed
5468 that a return path would always be set for a "successful" delivery. In this
5469 case, the whole delivery is bypassed as an optimization, and therefore no
5472 21. Internal re-arrangement: the function for sending a challenge and reading
5473 a response while authentication was assuming a zero-terminated challenge
5474 string. It's now changed to take a pointer and a length, to allow for
5475 binary data in such strings.
5477 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5479 23. Exim was not respecting finduser_retries when seeking the login of the
5480 uid under which it was called; it was always trying 10 times. (The default
5481 setting of finduser_retries is zero.) Also, it was sleeping after the final
5482 failure, which is pointless.
5484 24. Implemented tls_on_connect_ports.
5486 25. Implemented acl_smtp_predata.
5488 26. If the domain in control=submission is set empty, Exim assumes that the
5489 authenticated id is a complete email address when it generates From: or
5490 Sender: header lines.
5492 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5493 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5494 chown and chgrp in /bin and hostname in /usr/bin.
5496 28. Exim was keeping the "process log" file open after each use, just as it
5497 does for the main log. This opens the possibility of it remaining open for
5498 long periods when the USR1 signal hits a daemon. Occasional processlog
5499 errors were reported, that could have been caused by this. Anyway, it seems
5500 much more sensible not to leave this file open at all, so that is what now
5503 29. The long-running daemon process does not normally write to the log once it
5504 has entered its main loop, and it closes the log before doing so. This is
5505 so that log files can straightforwardly be renamed and moved. However,
5506 there are a couple of unusual error situations where the daemon does write
5507 log entries, and I had neglected to close the log afterwards.
5509 30. The text of an SMTP error response that was received during a remote
5510 delivery was being truncated at 512 bytes. This is too short for some of
5511 the long messages that one sometimes sees. I've increased the limit to
5514 31. It is now possible to make retry rules that apply only when a message has a
5515 specific sender, in particular, an empty sender.
5517 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5518 it possible to be selective about when SMTP synchronization is enforced.
5520 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5522 32. Implemented hosts_connection_nolog.
5524 33. Added an ACL for QUIT.
5526 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5529 35. Added mailbox_size and mailbox_filecount to appendfile.
5531 36. Added control = no_multiline_responses to ACLs.
5533 37. There was a bug in the logic of the code that waits for the clock to tick
5534 in the case where the clock went backwards by a substantial amount such
5535 that the microsecond fraction of "now" was more than the microsecond
5536 fraction of "then" (but the whole seconds number was less).
5538 38. Added support for the libradius Radius client library this is found on
5539 FreeBSD (previously only the radiusclient library was supported).
5545 1. When certain lookups returned multiple values in the form name=value, the
5546 quoting of the values was not always being done properly. Specifically:
5547 (a) If the value started with a double quote, but contained no whitespace,
5549 (b) If the value contained whitespace other than a space character (i.e.
5550 tabs or newlines or carriage returns) it was not quoted.
5551 This fix has been applied to the mysql and pgsql lookups by writing a
5552 separate quoting function and calling it from the lookup code. The fix
5553 should probably also be applied to nisplus, ibase and oracle lookups, but
5554 since I cannot test any of those, I have not disturbed their existing code.
5556 2. A hit in the callout cache for a specific address caused a log line with no
5557 reason for rejecting RCPT. Now it says "Previous (cached) callout
5558 verification failure".
5560 3. There was an off-by-one bug in the queryprogram router. An over-long
5561 return line was truncated at 256 instead of 255 characters, thereby
5562 overflowing its buffer with the terminating zero. As well as fixing this, I
5563 have increased the buffer size to 1024 (and made a note to document this).
5565 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5566 when Exim is waiting for an SMTP response from a remote server, Exim
5567 restarts its select() call on the socket, thereby resetting its timeout.
5568 This is not a problem when such interrupts are rare. Somebody set up a cron
5569 job to run exiwhat every 2 minutes, which is less than the normal select()
5570 timeout (5 or 10 minutes). This meant that the select() timeout never
5571 kicked in because it was always reset. I have fixed this by comparing the
5572 time when an interrupt arrives with the time at the start of the first call
5573 to select(). If more time than the timeout has elapsed, the interrupt is
5574 treated as a timeout.
5576 5. Some internal re-factoring in preparation for the addition of Sieve
5577 extensions (by MH). In particular, the "personal" test is moved to a
5578 separate function, and given an option for scanning Cc: and Bcc: (which is
5579 not set for Exim filters).
5581 6. When Exim created an email address using the login of the caller as the
5582 local part (e.g. when creating a From: or Sender: header line), it was not
5583 quoting the local part when it contained special characters such as @.
5585 7. Installed new OpenBSD configuration files.
5587 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5588 try to make them clearer.
5590 9. Callout options, other than the timeout value, were being ignored when
5591 verifying sender addresses in header lines. For example, when using
5593 verify = header_sender/callout=no_cache
5595 the cache was (incorrectly) being used.
5597 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5598 only the Cygwin environment.
5600 11. When return_path_on_delivery was set as a log selector, if different remote
5601 addresses in the same message used different return paths and parallel
5602 remote delivery occurred, the wrong values would sometimes be logged.
5603 (Whenever a remote delivery process finished, the return path value from
5604 the most recently started remote delivery process was logged.)
5606 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5607 lines when AUTH and/or TLS are in use. This is the "received protocol"
5608 field. Exim used to use "asmtp" for authenticated SMTP, without any
5609 indication (in the protocol name) for TLS use. Now it follows the RFC and
5610 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5611 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5612 names appear in log lines as well as in Received: header lines.
5614 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5615 extensions, and comparison tests, and to fix some bugs.
5617 14. Changes to the "personal" filter test:
5619 (1) The test was buggy in that it was just doing the equivalent of
5620 "contains" tests on header lines. For example, if a user's address was
5621 anne@some.where, the "personal" test would incorrectly be true for
5623 To: susanne@some.where
5625 This test is now done by extracting each address from the header in turn,
5626 and checking the entire address. Other tests that are part of "personal"
5627 are now done using regular expressions (for example, to check local parts
5628 of addresses in From: header lines).
5630 (2) The list of non-personal local parts in From: addresses has been
5631 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5632 taken from the Sieve specification recommendations.
5634 (3) If the message contains any header line starting with "List-" it is
5635 treated as non-personal.
5637 (4) The test for "circular" in the Subject: header line has been removed
5638 because it now seems ill-conceived.
5640 15. Minor typos in src/EDITME comments corrected.
5642 16. Installed latest exipick from John Jetmore.
5644 17. If headers_add on a router specified a text string that was too long for
5645 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5646 of string_sprintf() is now avoided.
5648 18. $message_body_size was not set (it was always zero) when running the DATA
5649 ACL and the local_scan() function.
5651 19. For the "mail" command in an Exim filter, no default was being set for
5652 the once_repeat time, causing a random time value to be used if "once" was
5653 specified. (If the value happened to be <= 0, no repeat happened.) The
5654 default is now 0s, meaning "never repeat". The "vacation" command was OK
5655 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5656 (I found it when inspecting the code).
5658 20. There is now an overall timeout for performing a callout verification. It
5659 defaults to 4 times the callout timeout, which applies to individual SMTP
5660 commands during the callout. The overall timeout applies when there is more
5661 than one host that can be tried. The timeout is checked before trying the
5662 next host. This prevents very long delays if there are a large number of
5663 hosts and all are timing out (e.g. when the network connections are timing
5664 out). The value of the overall timeout can be changed by specifying an
5665 additional sub-option for "callout", called "maxwait". For example:
5667 verify = sender/callout=5s,maxwait=20s
5669 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5670 to the end before writing, but this should make it even safer).
5672 22. Exim was forgetting that it had advertised PIPELINING for the second and
5673 subsequent messages on an SMTP connection. It was also not resetting its
5674 memory on STARTTLS and an internal HELO.
5676 23. When Exim logs an SMTP synchronization error within a session, it now
5677 records whether PIPELINING has been advertised or not.
5679 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5680 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5681 rather than long int.
5683 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5685 26. Added the never_mail option to autoreply.
5691 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5692 crash if the getsockname() call failed; this can happen if a connection is
5693 closed very soon after it is established. The problem was simply in the
5694 order in which certain operations were done, causing Exim to try to write
5695 to the SMTP stream before it had set up the file descriptor. The bug has
5696 been fixed by making things happen in the correct order.
5702 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5703 before the connection was closed, thus losing the rejection response.
5705 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5706 some early Solaris releases, but causes trouble in current releases where
5707 socklen_t is defined.
5709 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5712 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5715 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5716 that releasing the top of it at the end releases what was used for sub-
5717 expansions (unless the block got too big). However, discard this block if
5718 the first thing is a variable or header, so that we can use its block when
5719 it is dynamic (useful for very large $message_headers, for example).
5721 6. Lookups now cache *every* query, not just the most recent. A new, separate
5722 store pool is used for this. It can be recovered when all lookup caches are
5723 flushed. Lookups now release memory at the end of their result strings.
5724 This has involved some general refactoring of the lookup sources.
5726 7. Some code has been added to the store_xxx() functions to reduce the amount
5727 of flapping under certain conditions.
5729 8. log_incoming_interface used to affect only the <= reception log lines. Now
5730 it causes the local interface and port to be added to several more SMTP log
5731 lines, for example "SMTP connection from", and rejection lines.
5733 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5735 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5737 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5738 could be overwritten at the end of the current message (or the start of a
5739 new message if it was set in a HELO ACL). The value is now preserved for
5740 the duration of the SMTP connection.
5742 12. If a transport had a headers_rewrite setting, and a matching header line
5743 contained an unqualified address, that address was qualified, even if it
5744 did not match any rewriting rules. The underlying bug was that the values
5745 of the flags that permit the existence of unqualified sender and recipient
5746 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5747 non-local messages, and by -bnq for local messages) were not being
5748 preserved with the message after it was received.
5750 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5751 "next input=" as part of the text comprising the host identity instead of
5752 the correct text. The code was using the same buffer for two different
5753 strings. However, depending on which order the printing function evaluated
5754 its arguments, the bug did not always show up. Under Linux, for example, my
5755 test suite worked just fine.
5757 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5758 doesn't work with some older versions of Perl. It has been changed to "my",
5759 which in any case is probably the better facility to use.
5761 15. A really picky compiler found some instances of statements for creating
5762 error messages that either had too many or two few arguments for the format
5765 16. The size of the buffer for calls to the DNS resolver has been increased
5766 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5767 for addresses that have a lot of PTR records. This alleviates a problem; it
5768 does not fully solve it.
5770 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5771 buffer now truncates the list and logs the incident, which is the same
5772 action as happens when Exim is looking up a host name and its aliases.
5773 Previously in this situation something unpredictable would happen;
5774 sometimes it was "internal error: store_reset failed".
5776 18. If a server dropped the connection unexpectedly when an Exim client was
5777 using GnuTLS and trying to read a response, the client delivery process
5778 crashed while trying to generate an error log message.
5780 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5781 string, for example:
5783 warn message = H1: something\nH2: something
5785 the text was added as a single header line from Exim's point of view
5786 though it ended up OK in the delivered message. However, searching for the
5787 second and subsequent header lines using $h_h2: did not work. This has been
5788 fixed. Similarly, if a system filter added multiple headers in this way,
5789 the routers could not see them.
5791 20. Expanded the error message when iplsearch is called with an invalid key to
5792 suggest using net-iplsearch in a host list.
5794 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5795 ACLs are no longer actually imposed (and a message to that effect is
5798 22. If a "gecos" field in a passwd entry contained escaped characters, in
5799 particular, if it contained a \" sequence, Exim got it wrong when building
5800 a From: or a Sender: header from that name. A second bug also caused
5801 incorrect handling when an unquoted " was present following a character
5802 that needed quoting.
5804 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5805 was not being matched caselessly.
5807 24. Arranged for all hyphens in the exim.8 source to be escaped with
5810 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5811 properly. Recipient callout cache records were still being keyed to include
5812 the sender, even when use_sender was set false. This led to far more
5813 callouts that were necessary. The sender is no longer included in the key
5814 when use_sender is false.
5816 26. Added "control = submission" modifier to ACLs.
5818 27. Added the ${base62d: operator to decode base 62 numbers.
5820 28. dnsdb lookups can now access SRV records.
5822 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5823 the configuration file.
5825 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5826 (-v) mode. This makes the output for a verbose queue run more intelligible.
5828 31. Added a use_postmaster feature to recipient callouts.
5830 32. Added the $body_zerocount variable, containing the number of binary zero
5831 bytes in the message body.
5833 33. The time of last modification of the "new" subdirectory is now used as the
5834 "mailbox time last read" when there is a quota error for a maildir
5837 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5839 35. Added +ignore_unknown as a special item in host lists.
5841 36. Code for decoding IPv6 addresses in host lists is now included, even if
5842 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5843 address was recognized as an IP address, but was then not correctly decoded
5844 into binary, causing unexpected and incorrect effects when compared with
5851 1. Very minor rewording of debugging text in manualroute to say "list of
5852 hosts" instead of "hostlist".
5854 2. If verify=header_syntax was set, and a header line with an unqualified
5855 address (no domain) and a large number of spaces between the end of the
5856 name and the colon was received, the reception process suffered a buffer
5857 overflow, and (when I tested it) crashed. This was caused by some obsolete
5858 code that should have been removed. The fix is to remove it!
5860 3. When running in the test harness, delay a bit after writing a bounce
5861 message to get a bit more predictability in the log output.
5863 4. Added a call to search_tidyup() just before forking a reception process. In
5864 theory, someone could use a lookup in the expansion of smtp_accept_max_
5865 per_host which, without the tidyup, could leave open a database connection.
5867 5. Added the variables $recipient_data and $sender_data which get set from a
5868 lookup success in an ACL "recipients" or "senders" condition, or a router
5869 "senders" option, similar to $domain_data and $local_part_data.
5871 6. Moved the writing of debug_print from before to after the "senders" test
5874 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5875 problems for message scanning, either using a data ACL, or using
5876 local_scan() because the Received: header was not generated till after they
5877 were called (in order to set the time as the time of reception completion).
5878 I have revised the way this works. The header is now generated after the
5879 body is received, but before the ACL or local_scan() are called. After they
5880 are run, the timestamp in the header is updated.
5886 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5887 before starting a queue runner without re-exec. This happened only when
5888 deliver_drop_privilege was set or when the Exim user was set to root. The
5889 effect of the bug was that timeouts during subsequent deliveries caused
5890 crashes instead of being properly handled. The handler is now left at its
5891 default (and expected) setting.
5893 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5894 message, again when deliver_drop_privilege is set or Exim is run as root.
5895 The bug described in (1) was not present in this case, but the tidying up
5896 of the other signals was missing. I have made the two cases consistent.
5898 3. The ignore_target_hosts setting on a manualroute router was being ignored
5899 for hosts that were looked up using the /MX notation.
5901 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5904 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5905 operated on the sender address. After changing the $sender_address to <>
5906 for the sender address verify, Exim was re-instated it as the original
5907 (before rewriting) address, but remembering that it had rewritten it, so it
5908 wasn't rewriting it again. This bug also had the effect of breaking the
5909 sender address verification caching when the sender address was rewritten.
5911 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5912 This has been changed so that if the ip literal address matches
5913 ignore_target_hosts, the router declines.
5915 7. Added expansion conditions match_domain, match_address, and match_local_
5916 part (NOT match_host).
5918 8. The placeholder for the Received: header didn't have a length field set.
5920 9. Added code to Exim itself and to exim_lock to test for a specific race
5921 condition that could lead to file corruption when using MBX delivery. The
5922 issue is with the lockfile that is created in /tmp. If this file is removed
5923 after a process has opened it but before that process has acquired a lock,
5924 there is the potential for a second process to recreate the file and also
5925 acquire a lock. This could lead to two Exim processes writing to the file
5926 at the same time. The added code performs the same test as UW imapd; it
5927 checks after acquiring the lock that its file descriptor still refers to
5928 the same named file.
5930 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5931 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5934 11. Added the smtp_active_hostname option. If used, this will typically be made
5935 to depend on the incoming interface address. Because $interface_address is
5936 not set up until the daemon has forked a reception process, error responses
5937 that can happen earlier (such as "too many connections") no longer contain
5940 12. If an expansion in a condition on a "warn" statement fails because a lookup
5941 defers, the "warn" statement is abandoned, and the next ACL statement is
5942 processed. Previously this caused the whole ACL to be aborted.
5944 13. Added the iplsearch lookup type.
5946 14. Added ident_timeout as a log selector.
5948 15. Added tls_certificate_verified as a log selector.
5950 16. Added a global option tls_require_ciphers (compare the smtp transport
5951 option of the same name). This controls incoming TLS connections.
5953 17. I finally figured out how to make tls_require_ciphers do a similar thing
5954 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5955 before starting the TLS session.
5957 18. Tabs are now shown as \t in -bP output.
5959 19. If the log selector return_path_on_delivery was set, Exim crashed when
5960 bouncing a message because it had too many Received: header lines.
5962 20. If two routers both had headers_remove settings, and the first one included
5963 a superfluous trailing colon, the final name in the first list and the
5964 first name in the second list were incorrectly joined into one item (with a
5965 colon in the middle).
5971 1. Added -C and -D options to the exinext utility, mainly to make it easier
5972 to include in the automated testing, but these could be helpful when
5973 multiple configurations are in use.
5975 2. The exinext utility was not formatting the output nicely when there was
5976 an alternate port involved in the retry record key, nor when there was a
5977 message id as well (for retries that were specific to a specific message
5978 and a specific host). It was also confused by IPv6 addresses, because of
5979 the additional colons they contain. I have fixed the IPv4 problem, and
5980 patched it up to do a reasonable job for IPv6.
5982 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5983 delivery, the log line now contains "pipelined" if PIPELINING was used.
5985 4. An SMTP transport process used to panic and die if the bind() call to set
5986 an explicit outgoing interface failed. This has been changed; it is now
5987 treated in the same way as a connect() failure.
5989 5. A reference to $sender_host_name in the part of a conditional expansion
5990 that was being skipped was still causing a DNS lookup. This no longer
5993 6. The def: expansion condition was not recognizing references to header lines
5994 that used bh_ and bheader_.
5996 7. Added the _cache feature to named lists.
5998 8. The code for checking quota_filecount in the appendfile transport was
5999 allowing one more file than it should have been.
6001 9. For compatibility with Sendmail, the command line option
6009 and sets the incoming protocol and host name (for trusted callers). The
6010 host name and its colon can be omitted when only the protocol is to be set.
6011 Note the Exim already has two private options, -pd and -ps, that refer to
6012 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6013 "s", but I don't think that's a major issue.
6015 10. A number of refactoring changes to the code, none of which should affect
6018 (a) The number of logging options was getting close to filling up the
6019 32-bit word that was used as a bit map. I have split them into two classes:
6020 those that are passed in the argument to log_write(), and those that are
6021 only ever tested independently outside of that function. These are now in
6022 separate 32-bit words, so there is plenty of room for expansion again.
6023 There is no change in the user interface or the logging behaviour.
6025 (b) When building, for example, log lines, the code previously used a
6026 macro that called string_cat() twice, in order to add two strings. This is
6027 not really sufficiently general. Furthermore, there was one instance where
6028 it was actually wrong because one of the argument was used twice, and in
6029 one call a function was used. (As it happened, calling the function twice
6030 did not affect the overall behaviour.) The macro has been replaced by a
6031 function that can join an arbitrary number of extra strings onto a growing
6034 (c) The code for expansion conditions now uses a table and a binary chop
6035 instead of a serial search (which was left over from when there were very
6036 few conditions). Also, it now recognizes conditions like "pam" even when
6037 the relevant support is not compiled in: a suitably worded error message is
6038 given if an attempt is made to use such a condition.
6040 11. Added ${time_interval:xxxxx}.
6042 12. A bug was causing one of the ddress fields not to be passed back correctly
6043 from remote delivery subprocesses. The field in question was not being
6044 subsequently used, so this caused to problems in practice.
6046 13. Added new log selectors queue_time and deliver_time.
6048 14. Might have fixed a bug in maildirsizefile handling that threw up
6049 "unexpected character" debug warnings, and recalculated the data
6050 unnecessarily. In any case, I expanded the warning message to give more
6053 15. Added the message "Restricted characters in address" to the statements in
6054 the default ACL that block characters like @ and % in local parts.
6056 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6057 Three changes have been made:
6059 (a) There was a serious bug; a negative response to MAIL caused the whole
6060 recipient domain to be cached as invalid, thereby blocking all messages
6061 to all local parts at the same domain, from all senders. This bug has
6062 been fixed. The domain is no longer cached after a negative response to
6063 MAIL if the sender used is not empty.
6065 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6068 (c) A new callout option, "use_sender" has been added for people who want
6069 the modified behaviour.
6075 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6078 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6079 indeed breaks things for older releases.
6081 3. Added additional logging to the case where there is a problem reading data
6082 from a filter that is running in a subprocess using a pipe, in order to
6083 try to track down a specific problem.
6085 4. Testing facility fudge: when running in the test harness and attempting
6086 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6087 getting "No route to host". Convert this to a timeout.
6089 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6092 6. Some OS don't have socklen_t but use size_t instead. This affects the
6093 fifth argument of getsockopt() amongst other things. This is now
6094 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6095 can be set for individual OS. I have set it for SunOS5, OSF1, and
6096 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6097 some earlier ones do not.
6099 7. Change 4.30/15 was not doing the test caselessly.
6101 8. The standard form for an IPv6 address literal was being rejected by address
6102 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6103 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6104 this, as well as the form without the "IPv6" on the front (but only when
6105 address literals are enabled, of course).
6107 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6109 10. Exim crashed if a message with an empty sender address specified by -f
6110 encountered a router with an errors_to setting. This could be provoked only
6111 by a command such as
6115 where an empty string was supplied; "<>" did not hit this bug.
6117 11. Installed PCRE release 4.5.
6119 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6120 remained set. It is now erased.
6122 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6123 times from message ids (which are base 36 rather than the normal 62).
6125 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6126 were being counted as actual protocol errors, and logged if the log
6127 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6128 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6129 and DATA following a set of rejected RCPTs do not count as protocol errors.
6130 In other words, Exim assumes they were pipelined, though this may not
6131 actually be the case. Of course, in all cases the client gets an
6132 appropriate error code.
6134 15. If a lookup fails in an ACL condition, a message about the failure may
6135 be available; it is used if testing the ACL cannot continue, because most
6136 such messages specify what the cause of the deferral is. However, some
6137 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6138 that caused an old message to be retained and used if a later statement
6139 caused a defer, replacing the real cause of the deferral.
6141 16. If an IP address had so many PTR records that the DNS lookup buffer
6142 was not large enough to hold them, Exim could crash while trying to process
6143 the truncated data. It now detects and logs this case.
6145 17. Further to 4.21/58, another change has been made: if (and only if) the
6146 first line of a message (the first header line) ends with CRLF, a bare LF
6147 in a subsequent header line has a space inserted after it, so as not to
6148 terminate the header.
6150 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6151 unnecessarily, used atoi() instead of strtol(), and didn't check the
6152 termination when getting file sizes from file names by regex.
6154 19. Completely re-implemented the support for maildirsize files, in the light
6155 of a number of problems with the previous contributed implementation
6156 (4.30/29). In particular:
6158 . If the quota is zero, the maildirsize file is maintained, but no quota is
6161 . If the maildir directory does not exist, it is created before any attempt
6162 to write a maildirsize file.
6164 . The quota value in the file is just a cache; if the quota is changed in
6165 the transport, the new value overrides.
6167 . A regular expression is available for excluding directories from the
6170 20. The autoreply transport checks the characters in options that define the
6171 message's headers; it allows continued headers, but it was checking with
6172 isspace() after an embedded newline instead of explicitly looking for a
6175 21. If all the "regular" hosts to which an address was routed had passed their
6176 expiry times, and had not reached their retry times, the address was
6177 bounced, even if fallback hosts were defined. Now Exim should go on to try
6180 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6181 equivalent code in the SMTP transport. Some hosts send humungous responses
6182 to HELO/EHLO, more than 1024 it seems.
6184 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6185 gives compiler warnings in some environments. I've now done it "properly",
6188 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6189 (because of problems with the built-in one) was declared to return uschar *
6190 instead of char *, causing compiler failure.
6192 25. Fixed a file descriptor leak when processing alias/forward files.
6194 26. Fixed a minor format string issue in dbfn.c.
6196 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6198 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6199 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6202 29. When a sender address is verified, it is cached, to save repeating the test
6203 when there is more than one recipient in a message. However, when the
6204 verification involves a callout, it is possible for different callout
6205 options to be set for different recipients. It is too complicated to keep
6206 track of this in the cache, so now Exim always runs a verification when a
6207 callout is required, relying on the callout cache for the optimization.
6208 The overhead is duplication of the address routing, but this should not be
6211 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6212 to be verified with callout=postmaster, and the main callout worked but the
6213 postmaster check failed, the verification correctly failed. However, if a
6214 subsequent RCPT command asked for sender verification *without* the
6215 postmaster check, incorrect caching caused this verification also to fail,
6218 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6219 it was not caching the DNS options (qualify_single, search_parents) that
6220 were used when the lookup failed. A subsequent lookup with different
6221 options therefore always gave the same answer, though there were cases
6222 where it should not have. (Example: a "domains = !$mx_any" option on a
6223 dnslookup router: the "domains" option is always processed without any
6224 widening, but the router might have qualify_single set.) Now Exim uses the
6225 cached value only when the same options are set.
6227 32. Added John Jetmore's "exipick" utility to the distribution.
6229 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6230 than a timeout (e.g. a certificate is required, and is not provided), an
6231 Exim server now closes the connection immediately. Previously it waited for
6232 the client to close - but if the client is SSL, it seems that they each
6233 wait for each other, leading to a delay before one of them times out.
6235 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6236 maintained 0.8.x compatibility because I don't think many are using it, and
6237 it is clearly obsolete.
6239 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6242 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6243 client certificate was expired. A simple patch fixes this, though I don't
6244 understand the full logic of why the verify callback is called multiple
6247 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6248 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6249 which causes problems with some clients (such as the Certicom SSL Plus
6250 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6251 disables the coutermeasure allowing Eudora to connect."
6253 38. Exim was not checking that a write() to a log file succeeded. This could
6254 lead to Bad Things if a log got too big, in particular if it hit a file
6255 size limit. Exim now panics and dies if it cannot write to a log file, just
6256 as it does if it cannot open a log file.
6258 39. Modified OS/Makefile-Linux so that it now contains
6260 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6262 The two -D definitions ensure that Exim is compiled with large file
6263 support, which makes it possible to handle log files that are bigger than
6266 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6267 instance) a domain was checked against a named list that involved a lookup,
6268 causing $domain_data to be set, then another domain was checked against the
6269 same list, then the first domain was re-checked, the value of $domain_data
6270 after the final check could be wrong. In particular, if the second check
6271 failed, it could be set empty. This bug probably also applied to
6274 41. The strip_trailing_dot option was not being applied to the address given
6275 with the -f command-line option.
6277 42. The code for reading a message's header from the spool was incrementing
6278 $received_count, but never initializing it. This meant that the value was
6279 incorrect (doubled) while delivering a message in the same process in which
6280 it was received. In the most common configuration of Exim, this never
6281 happens - a fresh exec is done - but it can happen when
6282 deliver_drop_privilege is set.
6284 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6285 it now includes up to 150 characters of the unexpected data in the log
6288 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6289 and building data strings. The size of both of these buffers was 10 000
6290 bytes - far larger than anybody would *ever* want, thought I. Needless to
6291 say, somebody hit the limit. I have increased the maximum line length to
6292 20 000 and the maximum data length of concatenated lines to 100 000. I have
6293 also fixed two bugs, because there was no checking on these buffers. Tsk,
6294 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6295 buffer is too small.
6297 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6298 lsearch lookups. Now it does.
6300 46. When parsing a route_list item in a manualroute router, a fixed-length
6301 buffer was used for the list of hosts. I made this 1024 bytes long,
6302 thinking that nobody would ever have a list of hosts that long. Wrong.
6303 Somebody had a whole pile of complicated expansion conditions, and the
6304 string was silently truncated, leading to an expansion error. It turns out
6305 that it is easier to change to an unlimited length (owing to other changes
6306 that have happened since this code was originally written) than to build
6307 structure for giving a limitation error. The length of the item that
6308 expands into the list of hosts is now unlimited.
6310 47. The lsearch lookup could not handle data where the length of text line was
6311 more than 4095 characters. Such lines were truncated, leading to shortened
6312 data being returned. It should now handle lines of any length.
6314 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6315 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6318 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6319 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6320 no longer happens in comment lines. A list of replacements is now placed
6321 at the head of all of the source files, except those whose only change is
6322 to replace PERL_COMMAND in the very first #! line.
6324 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6325 messages on the queue, with a bottom-up merge sort, using code contributed
6326 by Michael Haardt. This should make operations like -bp somewhat faster on
6327 large queues. It won't affect queue runners, except when queue_run_in_order
6330 51. Installed eximstats 1.31 in the distribution.
6332 52. Added support for SRV lookups to the dnslookup router.
6334 53. If an ACL referred to $message_body or $message_body_end, the value was not
6335 reset for any messages that followed in the same SMTP session.
6337 54. The store-handling optimization for building very long strings was not
6338 differentiating between the different store pools. I don't think this
6339 actually made any difference in practice, but I've tidied it.
6341 55. While running the routers to verify a sender address, $sender_address
6342 was still set to the sender address. This is wrong, because when routing to
6343 send a bounce to the sender, it would be empty. Therefore, I have changed
6344 it so that, while verifying a sender address, $sender_address is set to <>.
6345 (There is no change to what happens when verifying a recipient address.)
6347 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6348 target A or AAAA records (if not already returned) without resetting the
6349 qualify_single or search_parents options of the DNS resolver. These are
6350 inappropriate in this case because the targets of MX and SRV records must
6351 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6352 target that, when qualified, matched something in the local domain. These
6353 two options are now turned off when doing these lookups.
6355 57. It seems that at least some releases of Reiserfs (which does not have the
6356 concept of a fixed number of inodes) returns zero and not -1 for the
6357 number of available inodes. This interacted badly with check_spool_inodes,
6358 which assumed that -1 was the "no such thing" setting. What I have done is
6359 to check that the total number of inodes is greater than zero before doing
6360 the test of how many are available.
6362 58. When a "warn" ACL statement has a log_message modifier, the message is
6363 remembered, and not repeated. This is to avoid a lot of repetition when a
6364 message has many recipients that cause the same warning to be written.
6365 However, Exim was preserving the list of already written lines for an
6366 entire SMTP session, which doesn't seem right. The memory is now reset if a
6367 new message is started.
6369 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6370 debugging output unless log_rewrite was also set.
6372 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6373 of (int)(handle) when we know that handle contains (void *)(-1).
6375 61. The Exim daemon panic-logs an error return when it closes the incoming
6376 connection. However "connection reset by peer" seems to be common, and
6377 isn't really an error worthy of noting specially, so that particular error
6380 62. When Exim is trying to find all the local interfaces, it used to panic and
6381 die if the ioctl to get the interface flags failed. However, it seems that
6382 on at least one OS (Solaris 9) it is possible to have an interface that is
6383 included in the list of interfaces, but for which you get a failure error
6384 for this call. This happens when the interface is not "plumbed" into a
6385 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6386 failure of the "get flags" call assumes that the interface is down.
6388 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6389 makes life easier for people who are doing arithmetic on fields extracted
6390 from dates, where you often get leading zeros that should not be
6391 interpreted as octal.
6393 64. Added qualify_domain to the redirect router, to override the global
6396 65. If a pathologically long header line contained very many addresses (the
6397 report of this problem mentioned 10 000) and each of them was rewritten,
6398 Exim could use up a very large amount of memory. (It kept on making new
6399 copies of the header line as it rewrote, and never released the old ones.)
6400 At the expense of a bit more processing, the header rewriting function has
6401 been changed so that it no longer eats memory in this way.
6403 66. The generation of the Received: header has been moved from the time that a
6404 message starts to be received, to the time that it finishes. The timestamp
6405 in the Received: header should now be very close to that of the <= log
6406 line. There are two side-effects of this change:
6408 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6409 logged header lines no longer include the local Received: line, because
6410 it has not yet been created. The same applies to a copy of the message
6411 that is returned to a non-SMTP sender when a message is rejected.
6413 (b) When a filter file is tested using -bf, no additional Received: header
6414 is added to the test message. After some thought, I decided that this
6417 This change does not affect the value of $received_for. It is still set
6418 after address rewriting, but before local_scan() is called.
6420 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6422 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6423 gave an unhelpful panic error message, and a defer error. I have managed to
6424 change this behaviour so that it now rejects any supplied certificate,
6425 which seems right, as the list of acceptable certificates is empty.
6427 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6428 gave an unhelpful defer error. I have not managed to make this reject any
6429 supplied certificates, but the error message it gives is "no certificate
6430 supplied", which is not helpful.
6432 70. exigrep's output now also includes lines that are not associated with any
6433 message, but which match the given pattern. Implemented by a patch from
6434 Martin Sluka, which also tidied up the Perl a bit.
6436 71. Recipient callout verification, like sender verification, was using <> in
6437 the MAIL FROM command. This isn't really the right thing, since the actual
6438 sender may affect whether the remote host accepts the recipient or not. I
6439 have changed it to use the actual sender in the callout; this means that
6440 the cache record is now keyed on a recipient/sender pair, not just the
6441 recipient address. There doesn't seem to be a real danger of callout loops,
6442 since a callout by the remote host to check the sender would use <>.
6443 [SEE ABOVE: changed after hitting problems.]
6445 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6446 temporary errors. However, in the case of such a code being given after
6447 the end of a data transmission (i.e. after ".") Exim was failing to write
6448 a retry record for the message. (Yes, there was some broken host that was
6449 actually sending 8xx at this point.)
6451 73. An unknown lookup type in a host list could cause Exim to panic-die when
6452 the list was checked. (An example that provoked this was putting <; in the
6453 middle of a list instead of at the start.) If this happened during a DATA
6454 ACL check, a -D file could be left lying around. This kind of configuration
6455 error no longer causes Exim to die; instead it causes a defer error. The
6456 incident is still logged to the main and panic logs.
6458 74. Buglet left over from Exim 3 conversion. The message "too many messages
6459 in one connection" was written to the rejectlog but not the mainlog, except
6460 when address rewriting (yes!) was being logged.
6462 75. Added write_rejectlog option.
6464 76. When a system filter was run not as root (that is, when system_filter_user
6465 was set), the values of the $n variables were not being returned to the
6466 main process; thus, they were not subsequently available in the $sn
6469 77. Added +return_path_on_delivery log selector.
6471 78. A connection timeout was being treated differently from recipients deferred
6472 when testing hosts_max_try with a message that was older than the host's
6473 retry timeout. (The host should not be counted, thus allowing all hosts to
6474 be tried at least once before bouncing.) This may have been the cause of an
6475 occasionally reported bug whereby a message would remain on the queue
6476 longer than the retry timeout, but would be bounced if a delivery was
6477 forced. I say "may" because I never totally pinned down the problem;
6478 setting up timeout/retry tests is difficult. See also the next item.
6480 79. The ultimate address timeout was not being applied to errors that involved
6481 a combination of host plus message (for example, a timeout on a MAIL
6482 command). When an address resolved to a number of possible hosts, and they
6483 were not all tried for each delivery (e.g. because of hosts_max_try), a
6484 message could remain on the queue longer than the retry timeout.
6486 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6489 81. Fixed an obscure SMTP outgoing bug which required at least the following
6490 conditions: (a) there was another message waiting for the same server;
6491 (b) the server returned 5xx to all RCPT commands in the first message so
6492 that the message was not completed; (c) the server dropped the connection
6493 or gave a negative response to the RSET that Exim sends to abort the
6494 transaction. The observed case was a dropped connection after DATA that had
6495 been sent in pipelining mode. That is, the server had advertised PIPELINING
6496 but was not implementing it correctly. The effect of the bug was incorrect
6497 behaviour, such as trying another host, and this could lead to a crash.
6503 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6504 and daemon.c were passed as pointers to ints; they should have been
6505 pointers to socklen_t variables (which are typically unsigned ints).
6507 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6510 3. Fixed a really odd bug that affected only the testing scheme; patching a
6511 certain fixed string in the binary changed the value of another string that
6512 happened to be identical to the end of the original first string.
6514 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6515 name", it returns that address as the IP address. On some operating
6516 systems (e.g. Solaris), it also passes back the IP address string as the
6517 "host name". However, on others (e.g. Linux), it passes back an empty
6518 string. Exim wasn't checking for this, and was changing the host name to an
6519 empty string, assuming it had been canonicalized.
6521 5. Although rare, it is permitted to have more than one PTR record for a given
6522 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6523 all the names associated with an address, because they do in Solaris.
6524 However, it seems that they do not in Linux for data that comes from the
6525 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6526 I found this out when I moved to a new Linux workstation and tried to run
6527 the Exim test suite.
6529 To get round this problem I have changed the code so that it now does its
6530 own call to the DNS to look up PTR records when searching for a host name.
6531 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6532 addresses that are only in /etc/hosts are still found.
6534 This behaviour is, however, controlled by an option called host_lookup_
6535 order, which defaults to "bydns:byaddr". If people want to use the other
6536 order, or indeed, just use one or the other means of lookup, they can
6537 specify it in this variable.
6539 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6540 some operating systems, this comes back from gethostbyaddr() as an empty
6541 string, and this is what Exim used to test for. However, it seems that in
6542 other systems, "." is yielded. Exim now tests for this case too.
6544 7. The values of check_spool_space and check_log_space are now held internally
6545 as a number of kilobytes instead of an absolute number of bytes. If a
6546 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6547 kilobyte. This means that much larger values can be stored.
6549 8. Exim monitor: an attempt to get the action menu when not actually pointing
6550 at a message produces an empty menu entitled "No message selected". This
6551 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6552 no entries in it ("Shell widget menu has zero width and/or height"). So I
6553 have added a single, blank menu entry in this case.
6555 9. Added ${quote_local_part.
6557 10. MIME decoding is now applied to the contents of Subject: header lines when
6560 11. Now that a reference to $sender_host_address automatically causes a reverse
6561 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6562 host lookup before query-style lookups in lists that might use this
6563 variable. This has therefore been abolished, and the "net-" prefix is no
6564 longer necessary for query-style lookups.
6566 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6567 have been a typo for LFLAGS, so it has been changed.
6569 13. The install script calls Exim with "-C /dev/null" in order to find the
6570 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6571 to be output. However, since Exim outputs its version number before the
6572 error, it didn't break the script. It just looked ugly. I fixed this by
6573 always allowing "-C /dev/null" if the caller is root.
6575 14. Ignore overlarge ACL variable number when reading spool file - insurance
6576 against a later release with more variables having written the file.
6578 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6579 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6580 this, as well as the form without the "IPv6" on the front.
6582 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6583 OS/Makefile-Darwin file.
6585 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6586 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6588 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6589 variable. However, some OS use ints for inodes. I've added cast to long int
6590 to get rid of the compiler warning.
6592 19. I had forgotten to lock out "/../" in configuration file names when
6593 ALT_CONFIG_PREFIX was set.
6595 20. Routers used for verification do not need to specify transports. However,
6596 if such a router generated a host list, and callout was configured, Exim
6597 crashed, because it could not find a port number from the (non-existent)
6598 transport. It now assumes port 25 in this circumstance.
6600 21. Added the -t option to exigrep.
6602 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6603 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6604 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6605 them is set, LOOKUP_LSEARCH is forced.
6607 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6609 24. Added sender and host information to the "rejected by local_scan()" log
6610 line; previously there was no indication of these.
6612 25. Added .include_if_exists.
6614 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6615 Linux. It turns out that not all file systems support this. Apparently some
6616 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6617 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6618 not supported on the file descriptor, is now ignored when Exim is trying to
6619 sync a directory. This applies only to Linux.
6621 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6623 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6624 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6627 29. Added support for maildirsize files from supplied patch (modified a bit).
6629 30. The use of :fail: followed by an empty string could lead Exim to respond to
6630 sender verification failures with (e.g.):
6632 550 Verification failed for <xxx>
6633 550 Sender verify failed
6635 where the first response line was missing the '-' that indicates it is not
6636 the final line of the response.
6638 31. The loop for finding the name of the user that called Exim had a hardwired
6639 limit of 10; it now uses the value of finduser_retries, which is used for
6640 all other user lookups.
6642 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6645 33. Exim was neglecting to zero errno before one call of strtol() when
6646 expanding a string and expecting an integer value. On some systems this
6647 resulted in spurious "integer overflow" errors. Also, it was casting the
6648 result into an int without checking.
6650 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6651 did not work. The code looks as if it has *never* worked, though it appears
6652 to have been documented since at least release 1.62. I have made it work.
6654 35. The "timeout_DNS" error in retry rules, also documented since at least
6655 1.62, also never worked. As it isn't clear exactly what this means, and
6656 clearly it isn't a major issue, I have abolished the feature by treating it
6657 as "timeout", and writing a warning to the main and panic logs.
6659 36. The display of retry rules for -brt wasn't always showing the error code
6662 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6663 timeout_connect_A, timeout_connect_MX.
6665 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6666 to the empty sender.
6668 39. The daemon was not analysing the content of -oX till after it had closed
6669 stderr and disconnected from the controlling terminal. This meant that any
6670 syntax errors were only noted on the panic log, and the return code from
6671 the command was 0. By re-arranging the code a little, I've made the
6672 decoding happen first, so such errors now appear on stderr, and the return
6673 code is 1. However, the actual setting up of the sockets still happens in
6674 the disconnected process, so errors there are still only recorded on the
6677 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6678 connections (as happens on some IP stacks) was logged at start up time as
6679 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6680 it from "IPv6 and IPv4", which means that two separate sockets are being
6683 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6684 says whether AF_INET or AF_INET6 was passed as an argument.
6686 42. Exiwhat output was messed up when time zones were included in log
6689 43. Exiwhat now gives more information about the daemon's listening ports,
6690 and whether -tls-on-connect was used.
6692 44. The "port" option of the smtp transport is now expanded.
6694 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6695 silently ignored. Now an error message is written to the main and panic
6698 46. There's a new ACL modifier called "logwrite" which writes to a log file
6699 as soon as it is encountered.
6701 47. Added $local_user_uid and $local_user_gid at routing time.
6703 48. Exim crashed when trying to verify a sender address that was being
6706 49. Exim was recognizing only a space character after ".include". It now also
6707 recognizes a tab character.
6709 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6710 extracting the relevant information from the specification. The man page no
6711 longer contains scrambled data for the -d option, and I've added a section
6712 at the front about calling Exim under different names.
6714 51. Added "extra_headers" argument to the "mail" command in filter files.
6716 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6719 53. Installed eximstats 1.29.
6721 54. Added transport_filter_timeout as a generic transport option.
6723 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6724 Cc: header lines. This was required by RFC 822, but it not required by RFC
6727 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6728 incoming messages that did not have them. Now it does so only if the
6729 message originates locally, that is, if there is no associated remote host
6730 address. When Resent- header lines are present, this applies to the Resent-
6731 lines rather than the non-Resent- lines.
6733 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6734 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6736 58. Messages for configuration errors now include the name of the main
6737 configuration file - useful now that there may be more than one file in a
6738 list (.included file names were always shown).
6740 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6741 for those rare installations that do not start the daemon as root or run it
6742 setuid root. I've cut out the call to initgroups() if the daemon is not
6745 60. The Exim user and group can now be bound into the binary as text strings
6746 that are looked up at the start of Exim's processing.
6748 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6750 62. Added $mailstore_basename variable.
6752 63. Installed patch to sieve.c from Michael Haardt.
6754 64. When Exim failed to open the panic log after failing to open the main log,
6755 the original message it was trying to log was written to stderr and debug
6756 output, but if they were not available (the usual case in production), it
6757 was lost. Now it is written to syslog before the two lines that record the
6758 failures to open the logs.
6760 65. Users' Exim filters run in subprocesses under the user's uid. It is
6761 possible for a "deliver" command or an alias in a "personal" command to
6762 provoke an address rewrite. If logging of address rewriting is configured,
6763 this fails because the process is not running as root or exim. There may be
6764 a better way of dealing with this, but for the moment (because 4.30 needs
6765 to be released), I have disabled address rewrite logging when running a
6766 filter in a non-root, non-exim process.
6772 1. The buildconfig auxiliary program wasn't quoting the value set for
6773 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6774 not defined. This bug was masked in 4.22 by the effect that was fixed in
6777 2. Some messages that were rejected after a message id was allocated were
6778 shown as "incomplete" by exigrep. It no longer does this for messages that
6779 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6781 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6782 have allow_domain_literals set, the ID did not get logged in the <= line.
6783 Domain literals are now always recognized in Message-ID: header lines.
6785 4. The first argument for a ${extract expansion item is the key name or field
6786 number. Leading and trailing spaces in this item were not being ignored,
6787 causing some misleading effects.
6789 5. When deliver_drop_privilege was set, single queue runner processes started
6790 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6791 same command in the process it spins off) were not dropping privilege.
6793 6. When the daemon running as "exim" started a queue runner, it always
6794 re-executed Exim in the spun-off process. This is a waste of effort when
6795 deliver_drop_privilege is set. The new process now just calls the
6796 queue-runner function directly.
6802 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6805 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6806 ignored. Though the use of -oP was forcing the writing of a pid file, it
6807 was always written to the default place.
6809 3. If the message "no IP address found for host xxxx" is generated during
6810 incoming verification, it is now followed by identification of the incoming
6811 connection (so you can more easily find what provoked it).
6813 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6815 5. Added some features to "harden" Exim a bit more against certain attacks:
6817 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6818 be put in Local/Makefile. This is like the never_users runtime option,
6819 but it cannot be overridden. The default setting is "root".
6821 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6822 prefix string with which any file named in a -C command line option
6825 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6826 is retained for -C and -D only if the caller of Exim is root. Without
6827 it, the exim user may also use -C and -D and retain privilege.
6829 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6830 command line option is disabled.
6832 6. Macro names set by the -D option must start with an upper case letter, just
6833 like macro names defined in the configuration file.
6835 7. Added "dereference=" facility to LDAP.
6837 8. Two instances of the typo "uknown" in the source files are fixed.
6839 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6840 the Configure-Makefile script screwed up while processing it.
6842 10. Incorporated PCRE 4.4.
6844 11. The SMTP synchronization check was not operating right at the start of an
6845 SMTP session. For example, it could not catch a HELO sent before the client
6846 waited for the greeting. There is now a check for outstanding input at the
6847 point when the greeting is written. Because of the duplex, asynchronous
6848 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6849 way, but not yet received, when the check is performed.
6851 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6852 on TCP/IP sockets, because this apparently causes some broken clients to
6855 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6856 unchanged) from the Cygwin maintainer.
6858 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6859 was supported instead of testing for mbx. Effectively a typo.
6861 15. The spa authenticator server code was not checking that the input it
6862 received was valid base64.
6864 16. The debug output line for the "set" modifier in ACLs was not showing the
6865 name of the variable that was being set.
6867 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6869 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6870 lookup on its own. Something else was needed to trigger the lookup. For
6871 example, a match in host_lookup or the need for a host name in a host list.
6872 Now, if $sender_host_name is referenced and the host name has not yet been
6873 looked up, a lookup is performed. If the lookup fails, the variable remains
6874 empty, and $host_lookup_failed is set to "1".
6876 19. Added "eqi" as a case-independent comparison operator.
6878 20. The saslauthd authentication condition could segfault if neither service
6879 nor realm was specified.
6881 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6882 error message that was logged was misleading, and incoming SMTP
6883 connections were dropped. The message is now more accurate, and temporary
6884 errors are given to SMTP connections.
6886 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6887 (except RSET) with a 421 error, until QUIT is received. However, it was
6888 failing to send a response to QUIT.
6890 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6891 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6892 ACL is now run after the helo_try_verify_hosts code.
6894 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6895 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6896 case-independent, so other case variants are also recognized). Apparently
6897 some systems use these upper case variants.
6899 25. If more than two messages were waiting for the same host, and a transport
6900 filter was specified for the transport, Exim sent two messages over the
6901 same TCP/IP connection, and then failed with "socket operation on non-
6902 socket" when it tried to send the third.
6904 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6906 27. The extern definition of crypt16() in expand.c was not being excluded when
6907 the OS had its own crypt16() function.
6909 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6910 as a preferred synonym for return_size_limit, both as an option and as an
6913 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6915 30. Changed the default configuration ACL to relax the local part checking rule
6916 for addresses that are not in any local domains. For these addresses,
6917 slashes and pipe symbols are allowed within local parts, but the sequence
6918 /../ is explicitly forbidden.
6920 31. SPA server authentication was not clearing the challenge buffer before
6923 32. log_message in a "warn" ACL statement was writing to the reject log as
6924 well as to the main log, which contradicts the documentation and doesn't
6925 seem right (because no rejection is happening). So I have stopped it.
6927 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6928 However, I am unable to do any testing of this.
6930 34. Fixed an infelicity in the appendfile transport. When checking directories
6931 for a mailbox, to see if any needed to be created, it was accidentally
6932 using path names with one or more superfluous leading slashes; tracing
6933 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6935 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6936 contents are added to the log line that is written for every discarded
6937 recipient. (Previously a log_message setting was ignored.)
6939 36. The ${quote: operator now quotes the string if it is empty.
6941 37. The install script runs exim in order to find its version number. If for
6942 some reason other than non-existence or emptiness, which it checks, it
6943 could not run './exim', it was installing it with an empty version number,
6944 i.e. as "exim-". This error state is now caught, and the installation is
6947 38. An argument was missing from the function that creates an error message
6948 when Exim fails to connect to the socket for saslauthd authentication.
6949 This could cause Exim to crash, or give a corrupted message.
6951 39. Added isip, isip4, and isip6 to ${if conditions.
6953 40. The ACL variables $acl_xx are now saved with the message, and can be
6954 accessed later in routers, transports, and filters.
6956 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6957 strings in the file are not string-expanded.
6959 42. If a MAIL command specified a SIZE value that was too large to fit into an
6960 int variable, the check against message_size_limit failed. Such values are
6961 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6962 day this will have to be increased, but I don't think I want to be around
6963 when emails are that large.
6970 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6971 iconv() is not standard in FreeBSD.
6973 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6974 IPv6 enabled. The observed symptom was a segmentation fault on return from
6975 the function os_common_find_running_interfaces() in src/os.c.
6977 3. In the check_special_case() function in daemon.c I had used "errno" as an
6978 argument name, which causes warnings on some systems. This was basically a
6979 typo, since it was named "eno" in the comments!
6981 4. The code that waits for the clock to tick (at a resolution of some fraction
6982 of a second) so as to ensure message-id uniqueness was always waiting for
6983 at least one whole tick, when it could have waited for less. [This is
6984 almost certainly not relevant at current processor speeds, where it is
6985 unlikely to ever wait at all. But we try to future-proof.]
6987 5. The function that sleeps for a time interval that includes fractions of a
6988 second contained a race. It did not block SIGALRM between setting the
6989 timer, and suspending (a couple of lines later). If the interval was short
6990 and the sigsuspend() was delayed until after it had expired, the suspension
6991 never ended. On busy systems this could lead to processes getting stuck for
6994 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6995 process, before it forks any delivery processes. The open lookup caching
6996 mechanism meant that the open file or database connection was passed into
6997 the delivery process. The problem was that delivery processes always tidy
6998 up cached lookup data. This could cause a problem for the next delivery
6999 process started by the queue runner, because the external queue runner
7000 process does not know about the closure. So the next delivery process
7001 still has data in the lookup cache. In the case of a file lookup, there was
7002 no problem because closing a file descriptor in a subprocess doesn't affect
7003 the parent. However, if the lookup was caching a connection to a database,
7004 the connection was closed, and the second delivery process was likely to
7005 see errors such as "PGSQL: query failed: server closed the connection
7006 unexpectedly". The problem has been fixed by closing all cached lookups
7007 in a queue runner before running a delivery process.
7009 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7010 seem to have the "const" qualifier which it has on other OS. I've
7013 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7014 *of the same type* (client or server) with the same public name that an
7015 error should be diagnosed.
7017 9. When Exim looked up a host name for an IP address, but failed to find the
7018 original IP address when looking up the host name (a safety check), it
7019 output the message "<ip address> does not match any IP for NULL", which was
7020 confusing, to say the least. The bug was that the host name should have
7021 appeared instead of "NULL".
7023 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7024 user that is built into the binary, and the -C or -D options is used, root
7025 privilege is dropped before the configuration file is read. In addition,
7026 logging is switched to stderr instead of the normal log files. If the
7027 configuration then re-defines the Exim user, the unprivileged environment
7028 is probably not what is expected, so Exim logs a panic warning message (but
7031 However, if deliver_drop_privilege is set, the unprivileged state may well
7032 be exactly what is intended, so the warning has been cut out in that case,
7033 and Exim is allowed to try to write to its normal log files.
7039 1. smtp_return_error_details was not giving details for temporary sender
7040 or receiver verification errors.
7042 2. Diagnose a configuration error if two authenticators have the same public
7045 3. Exim used not to create the message log file for a message until the first
7046 delivery attempt. This could be confusing when incoming messages were held
7047 for policy or load reasons. The message log file is now created at the time
7048 the message is received, and an initial "Received" line is written to it.
7050 4. The automatically generated man page for command line options had a minor
7051 bug that caused no ill effects; however, a more serious problem was that
7052 the procedure for building the man page automatically didn't always
7053 operate. Consequently, release 4.20 contains an out-of-date version. This
7054 shouldn't happen again.
7056 5. When building Exim with embedded Perl support, the script that builds the
7057 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7058 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7060 6. The freeze_tell option was not being used for messages that were frozen on
7061 arrival, either by an ACL or by local_scan().
7063 7. Added the smtp_incomplete_transaction log selector.
7065 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7066 was accepting AUTH without a new EHLO.
7068 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7069 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7072 10. Logging of TCP/IP connections (when configured) now happens in the main
7073 daemon process instead of the child process, so that the TCP/IP connection
7074 count is more accurate (but it can never be perfect).
7076 11. The use of "drop" in a nested ACL was not being handled correctly in the
7077 outer ACL. Now, if condition failure induced by the nested "drop" causes
7078 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7079 or "require"), the connection is dropped.
7081 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7082 that yield "discard" can now be used with an "accept" or a "discard" verb,
7083 but an error is generated for any others (because I can't see a useful way
7084 to define what should happen).
7086 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7087 are now processed in the same way as lines in the Exim configuration file.
7088 In particular, continuation lines are supported.
7090 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7092 15. Added -ti meaning -t -i.
7094 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7095 domains, and warn by logging if others are found.
7097 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7098 returned from GIFCONF when Exim is trying to find the list of interfaces on
7099 a host. The code in os.c has been modified to copy each ifreq to an aligned
7100 structure in all cases.
7102 Also, in some cases, the returned ifreq's were being copied to a 'struct
7103 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7104 means the last couple of bytes of an IPv6 address could be chopped if the
7105 ifreq contained only a normal sockaddr (14 bytes storage).
7107 18. Named domain lists were not supported in the hosts_treat_as_local option.
7108 An entry such as +xxxx was not recognized, and was treated as a literal
7111 19. Ensure that header lines added by a DATA ACL are included in the reject log
7112 if the ACL subsequently rejects the message.
7114 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7115 MD5 (which is deprecated).
7117 21. When testing a filter file using -bf, Exim was writing a message when it
7118 took the sender from a "From " line in the message, but it was not doing so
7119 when it took $return_path from a Return-Path: header line. It now does.
7121 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7122 with a valid header line field name (a series of printing characters
7123 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7125 23. Changed "disc" in the source to "disk" to conform to the documentation and
7126 the book and for uniformity.
7128 24. Ignore Sendmail's -Ooption=value command line item.
7130 25. When execve() failed while trying to run a command in a pipe transport,
7131 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7132 could be confused with a return value of 69 from the command itself. This
7133 has been changed to 127, the value the shell returns if it is asked to run
7134 a non-existent command. The wording for the related log line suggests a
7135 non-existent command as the problem.
7137 26. If received_header_text expands to an empty string, do not add a Received:
7138 header line to the message. (Well, it adds a token one on the spool, but
7139 marks it "old" so that it doesn't get used or transmitted.)
7141 27. Installed eximstats 1.28 (addition of -nt option).
7143 28. There was no check for failure on the call to getsockname() in the daemon
7144 code. This can fail if there is a shortage of resources on the system, with
7145 ENOMEM, for example. A temporary error is now given on failure.
7147 29. Contrary to the C standard, it seems that in some environments, the
7148 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7149 program. Exim now does this explicitly; it affects the formatting of
7150 timestamps using strftime().
7152 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7153 complaints. I've now initialized all the variables, to avoid this.
7155 32. Header lines added by a system filter were not being "seen" during
7156 transport-time rewrites.
7158 33. The info_callback() function passed to OpenSSL is set up with type void
7159 (*)(SSL *, int, int), as described somewhere. However, when calling the
7160 function (actually a macro) that sets it up, the type void(*)() is
7161 expected. I've put in a cast to prevent warnings from picky compilers.
7163 34. If a DNS black list lookup found a CNAME record, but there were no A
7164 records associated with the domain it pointed at, Exim crashed.
7166 35. If a DNS black list lookup returned more than one A record, Exim ignored
7167 all but the first. It now scans all returned addresses if a particular IP
7168 value is being sought. In this situation, the contents of the
7169 $dnslist_value variable are a list of all the addresses, separated by a
7172 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7173 to accept a host name and all its aliases if the forward lookup for any of
7174 them yielded the IP address of the incoming connection. Now it accepts only
7175 those names whose forward lookup yields the correct IP address. Any other
7176 names are discarded. This closes a loophole whereby a rogue DNS
7177 administrator could create reverse DNS records to break through a
7178 wildcarded host restriction in an ACL.
7180 37. If a user filter or a system filter that ran in a subprocess used any of
7181 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7182 the wrong values were passed to the pipe command ($thisaddress had the
7183 value of $0, $0 had the value of $1, etc). This bug was introduced by
7184 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7186 38. Improved the line breaking for long SMTP error messages from ACLs.
7187 Previously, if there was no break point between 40 and 75 characters, Exim
7188 left the rest of the message alone. Two changes have been made: (a) I've
7189 reduced the minimum length to 35 characters; (b) if it can't find a break
7190 point between 35 and 75 characters, it looks ahead and uses the first one
7191 that it finds. This may give the occasional overlong line, but at least the
7192 remaining text gets split now.
7194 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7195 file descriptors might be low, and that setting 1000 would always raise it.
7196 It turns out that in some environments, the limit is already over 1000 and
7197 that lowering it causes trouble. So now Exim takes care not to decrease it.
7199 40. When delivering a message, the value of $return_path is set to $sender_
7200 address at the start of routing (routers may change the value). By an
7201 oversight, this default was not being set up when an address was tested by
7202 -bt or -bv, which affected the outcome if any router or filter referred to
7205 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7206 log only when "message" or "log_message" are set. However, if one of the
7207 conditions was an address verification, or a call to a nested ACL, the
7208 messages generated by the underlying test were being passed through. This
7209 no longer happens. The underlying message is available in $acl_verify_
7210 message for both "message" and "log_message" expansions, so it can be
7211 passed through if needed.
7213 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7214 new expansion $bh_ to give the encoded byte string without charset
7215 translation. Translation happens only if iconv() is available; HAVE_ICONV
7216 indicates this at build time. HEADERS_CHARSET gives the charset to
7217 translate to; headers_charset can change it in the configuration, and
7218 "headers charset" can change it in an individual filter file.
7220 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7221 that creates RFC 2047 encoded "words" labels them as that charset instead
7222 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7223 expansion operator; (ii) when Exim creates a From: line for a local
7224 message; (iii) when a header line is rewritten to include a "phrase" part.
7226 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7227 buggy, causing it to skip the first lines of messages whose message ID
7228 ended in 'D'. This would not have bitten before Exim release 4.14, because
7229 message IDs were unlikely to end in 'D' before then. The effect was to have
7230 incorrect size information for certain domains.
7232 45. #include "config.h" was missing at the start of the crypt16.c module. This
7233 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7236 46. If there was a timeout during a "random" callout check, Exim treated it as
7237 a failure of the random address, and carried on sending RSET and the real
7238 address. If the delay was just some slowness somewhere, the response to the
7239 original RCPT would be taken as a response to RSET and so on, causing
7240 mayhem of various kinds.
7242 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7243 when I implemented it. It didn't allow for the fact that some option values
7244 may legitimately be negative (e.g. size_addition), and it didn't even do
7245 the right test for positive values.
7247 48. Domain names in DNS records are case-independent. Exim always looks them up
7248 in lower case. Some resolvers return domain names in exactly the case they
7249 appear in the zone file, that is, they may contain uppercase letters. Not
7250 all resolvers do this - some return always lower case. Exim was treating a
7251 change of case by a resolver as a change of domain, similar to a widening
7252 of a domain abbreviation. This triggered its re-routing code and so it was
7253 trying to route what was effectively the same domain again. This normally
7254 caused routing to fail (because the router wouldn't handle the domain
7255 twice). Now Exim checks for this case specially, and just changes the
7256 casing of the domain that it ultimately uses when it transmits the message
7259 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7262 50. If a filter generated a file delivery with a non-absolute name (possible if
7263 no home directory exists for the router), the forbid_file option was not
7266 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7267 the existing equality matching.
7269 52. Exim was using ints instead of ino_t variables in some places where it was
7270 dealing with inode numbers.
7272 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7273 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7274 called TMPDIR, and if it finds it is different, it changes its value.
7276 54. The smtp_printf() function is now made available to local_scan() so
7277 additional output lines can be written before returning. There is also an
7278 smtp_fflush() function to enable the detection of a dropped connection.
7279 The variables smtp_input and smtp_batched_input are exported to
7282 55. Changed the default runtime configuration: the message "Unknown user"
7283 has been removed from the ACL, and instead placed on the localuser router,
7284 using the cannot_route_message feature. This means that any verification
7285 failures that generate their own messages won't get overridden. Similarly,
7286 the "Unrouteable address" message that was in the ACL for unverifiable
7287 relay addresses has also been removed.
7289 56. Added hosts_avoid_esmtp to the smtp transport.
7291 57. The exicyclog script was not checking for the esoteric option
7292 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7293 will work only if exicyclog is run under the appropriate euid.
7295 58. Following a discussion on the list, the rules by which Exim recognises line
7296 endings on incoming messages have been changed. The -dropcr and drop_cr
7297 options are now no-ops, retained only for backwards compatibility. The
7298 following line terminators are recognized: LF CRLF CR. However, special
7299 processing applies to CR:
7301 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7302 nor a local message in the state where . is a terminator.
7304 (ii) If a bare CR is encountered in a header line, an extra space is added
7305 after the line terminator so as not to end the header. The reasoning
7306 behind this is that bare CRs in header lines are most likely either
7307 to be mistakes, or people trying to play silly games.
7309 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7310 was being incorrectly given as 18 bytes larger than it should have been.
7311 This is a VOB (very old bug).
7313 60. This may never have affected anything current, but just in case it has:
7314 When the local host is found other than at the start of a list of hosts,
7315 the local host, those with the same MX, and any that follow, are discarded.
7316 When the list in question was part of a longer list of hosts, the following
7317 hosts (not currently being processed) were also being discarded. This no
7318 longer happens. I'm not sure if this situation could ever has previously
7321 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7324 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7325 header. This is something that is recommended in a new Internet Draft, and
7326 is something that is documented as being done by Sendmail. There are two
7327 possible values. For messages generated by the autoreply transport, Exim
7330 Auto-Submitted: auto-replied
7332 whereas for all other generated messages (e.g. bounces) it adds
7334 Auto-Submitted: auto-generated
7336 63. The "personal" condition in filters now includes a test for the
7337 Auto-Submitted: header. If it contains the string "auto-" the message it
7338 not considered personal.
7340 64. Added rcpt_include_affixes as a generic transport option.
7342 65. Added queue_only_override (default true).
7344 66. Added the syslog_duplication option.
7346 67. If what should have been the first header line of a message consisted of
7347 a space followed by a colon, Exim was mis-interpreting it as a header line.
7348 It isn't of course - it is syntactically invalid and should therefore be
7349 treated as the start of the message body. The misbehaviour could have
7350 caused a number of strange effects, including loss of data in subsequent
7351 header lines, and spool format errors.
7353 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7354 client host had authenticated. This control can now be exercised by an ACL
7355 for more flexibility.
7357 69. By default, callouts do not happen when testing with -bh. There is now a
7358 variant, -bhc, which does actually run the callout code, including
7359 consulting and updating the callout cache.
7361 70. Added support for saslauthd authentication, courtesy of Alexander
7364 71. If statvfs() failed on the spool or log directories while checking their
7365 size for availability, Exim confusingly gave the error "space shortage".
7366 Furthermore, in debugging mode it crashed with a floating point exception.
7367 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7368 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7369 serious problem, Exim now writes to the main and panic logs when this
7370 happens, with details of the failure. It then refuses to accept the
7371 incoming message, giving the message "spool directory problem" or "log
7372 directory problem" with a 421 code for SMTP messages.
7374 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7375 0, 1, and 2 exist, because some OS complain for execs without them (see
7376 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7377 descriptors. However, the code omitted to check that the open succeeded,
7378 causing mysterious errors if for some reason the permissions on /dev/null
7379 got screwed. Now Exim writes a message to the main and panic logs, and
7380 bombs out if it can't open /dev/null.
7382 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7383 interact so that it is all more flexible. It is supposed to remain
7384 backwards compatible. Also added extra_local_interfaces.
7386 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7387 to bomb out with an assertion failure - to the client this appears as a
7388 connection drop. This problem occurs in the part of the code that was taken
7389 from the Samba project. Fortunately, the assertion is in a very simple
7390 function, so I have fixed this by reproducing the function inline in the
7391 one place where it is called, and arranging for authentication to fail
7392 instead of killing the process with assert().
7394 75. The SPA client code was not working when the server requested OEM rather
7395 than Unicode encoding.
7397 76. Added code to make require_files with a specific uid setting more usable in
7398 the case where statting the file as root fails - usually a non-root-mounted
7399 NFS file system. When this happens and the failure is EACCES, Exim now
7400 forks a subprocess and does the per-uid checking as the relevant uid.
7402 77. Added process_log_path.
7404 78. If log_file_path was not explicitly set, a setting of check_log_space or
7405 check_log_inodes was ignored.
7407 79. If a space check for the spool or log partitions fails, the incident is now
7408 logged. Of course, in the latter case the data may get lost...
7410 80. Added the %p formatting code to string_format() so that it can be used to
7411 print addresses in debug_print(). Adjusted all the address printing in the
7412 debugging in store.c to use %p rather than %d.
7414 81. There was a concern that a line of code in smtp_in.c could overflow a
7415 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7416 initially expressed, the concern was not well-founded, because trailing
7417 spaces are removed early. However, if the trailing spaces were followed by
7418 a NULL, they did not get removed, so the overflow was possible. Two fixes
7421 (a) I re-wrote the offending code in a cleaner fashion.
7422 (b) If an incoming SMTP command contains a NULL character, it is rejected
7425 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7426 runs initgroups(), so that if the Exim user is in any additional groups,
7427 they will be used during message reception.
7433 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob