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
74 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
75 success-DSN messages. Previously the From: header was always the default
76 one for these; the option was ignored.
82 JH/01 Remove code calling the customisable local_scan function, unless a new
83 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
85 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
86 non-signal-safe functions being used.
88 JH/03 Bug 2269: When presented with a received message having a stupidly large
89 number of DKIM-Signature headers, disable DKIM verification to avoid
90 a resource-consumption attack. The limit is set at twenty.
92 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
93 report of oldest_pass in ${authres } in consequence, and separate out
94 some descriptions of reasons for verification fail.
96 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
97 files in the spool were present and unlocked. A queue-runner could spot
98 them, resulting in a duplicate delivery. Fix that by doing the unlock
99 after the unlink. Investigation by Tim Stewart. Take the opportunity to
100 add more error-checking on spoolfile handling while that code is being
103 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
104 No known attacks, no CVE, this is defensive hardening.
106 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
107 a queue-runner could start a delivery while other operations were ongoing.
108 Cutthrough delivery was a common victim, resulting in duplicate delivery.
109 Found and investigated by Tim Stewart. Fix by using the open message data
110 file handle rather than opening another, and not locally closing it (which
111 releases a lock) for that case, while creating the temporary .eml format
112 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
114 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
115 $sender_verify_failure/$recipient_verify_failure to "random".
117 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
120 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
121 Previously this would segfault.
123 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
126 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
127 like zero, since the resolver should be doing this for us, But we need one
128 as a CNAME but no MX presence gets the CNAME returned; we need to check
129 that doesn't point to an MX to declare it "no MX returned" rather than
130 "error, loop". A new main option is added so the older capability of
131 following some limited number of chain links is maintained.
133 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
135 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
136 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
137 now-deprecated earlier definitions used only specified the range up to TLS
138 1.2 (in the older-version library docs).
140 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
142 JH/15 Rework TLS client-side context management. Stop using a global, and
143 explicitly pass a context around. This enables future use of TLS for
144 connections to service-daemons (eg. malware scanning) while a client smtp
145 connection is using TLS; with cutthrough connections this is quite likely.
147 JH/16 Fix ARC verification to do AS checks in reverse order.
149 JH/17 Support a "tls" option on the ${readsocket } expansion item.
151 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
152 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
153 Previously the "utf8" would be re-prepended for every additional message.
155 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
156 Previously thery were accepted, resulting in issues when attempting to
157 forward messages to a non-supporting MTA.
159 PP/02 Let -n work with printing macros too, not just options.
161 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
162 one parent address was copied, and bogus data was used at delivery-logging
163 time. Either a crash (after delivery) or bogus log data could result.
164 Discovery and analysis by Tim Stewart.
166 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
167 Previously if the string ended mid-character, we did not insert the
168 promised '?' replacement.
170 PP/04 Documentation: current string operators work on bytes, not codepoints.
172 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
173 should pack well giving a smaller memory footprint so better caching and
174 therefore performance. Group the declarations where this can't be done so
175 that the byte-sized flag variables are not interspersed among pointer
176 variables, giving a better chance of good packing by the compiler.
178 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
179 non-null, to avoid issues with sites running BATV. Previously reports were
180 sent with an empty envelope sender so looked like bounces.
182 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
183 The ignore_error flag wasn't being returned from the filter subprocess so
184 was not set for later routers. Investigation and fix by Matthias Kurz.
186 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
187 and a msg:complete for the whole, when a message is manually removed using
188 -Mrm. Developement by Matthias Kurz, hacked on by JH.
190 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
191 a "Gnu special" function, asprintf() in the DB utility binary builds; I
192 hope that is portable enough.
194 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
195 requiring a known-CA anchor certificate; make it now rely entirely on the
196 TLSA as an anchor. Checking the name on the leaf cert against the name
197 on the A-record for the host is still done for TA (but not for EE mode).
199 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
200 included in delivery lines for non-proxied connections, when compiled with
201 SUPPORT_SOCKS and running with proxy logging enabled.
203 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
204 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
205 move the existing event to fire before the normal logging of message
206 failure so that custom logging is bracketed by normal logging.
208 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
209 msg:fail:internal event. Developement by Matthias Kurz.
211 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
212 far too small for todays use of crypto signatures stored there. Go all
213 the way to the max DNS message size of 64kB, even though this might be
214 overmuch for IOT constrained device use.
216 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
217 copy a string over itself. The library routine is documented as not
218 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
220 JH/32 For main options check_spool_space and check_inode_space, where the
221 platform supports 64b integers, support more than the previous 2^31 kB
222 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
223 the previous G, M, k.
225 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
226 $authenticated_fail_id variable on authentication failure. Previously
229 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
230 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
231 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
232 GNUTLS_SEC_PARAM_MEDIUM.
234 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
235 side. Previously we would continue as if no SNI had been received.
237 JH/36 Harden the handling of string-lists. When a list consisted of a sole
238 "<" character, which should be a list-separator specification, we walked
239 off past the nul-terimation.
241 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
242 causes) even when the retry time is not yet met. Previously they were
243 not, meaning that when (say) an account was over-quota and temp-rejecting,
244 and multiple senders' messages were queued, only one sender would get
245 notified on each configured delay_warning cycle.
247 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
249 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
250 cipher-suites, an error can be left on the stack even for a succeeding
251 accept; this results in impossible error messages when a later operation
254 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
255 return error codes indicating retry. Under TLS1.3 this becomes required.
257 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
258 it only wrote the new authenticators, resulting in a lack of tracking of
259 peer changes of ESMTP extensions until the next cache flush.
261 JH/41 Fix the loop reading a message header line to check for integer overflow,
262 and more-often against header_maxsize. Previously a crafted message could
263 induce a crash of the recive process; now the message is cleanly rejected.
265 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
266 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
272 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
273 When redis_servers is set to a list of > 1 element, and the Redis servers
274 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
275 case of MOVED into a DEFER case instead, thus moving the query onto the
276 next server in the list. For a cluster of N elements, all N servers must
277 be defined in redis_servers.
279 GF/02 Catch and remove uninitialized value warning in exiqsumm
280 Check for existence of @ARGV before looking at $ARGV[0]
282 JH/01 Replace the store_release() internal interface with store_newblock(),
283 which internalises the check required to safely use the old one, plus
284 the allocate and data copy operations duplicated in both (!) of the
285 extant use locations.
287 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
288 modifier. This matches the restriction on the commandline.
290 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
291 Previously only the last row was returned.
293 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
294 we assumed that tags in the header were well-formed, and parsed the
295 element content after inspecting only the first char of the tag.
296 Assumptions at that stage could crash the receive process on malformed
299 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
300 While running the DKIM ACL we operate on the Permanent memory pool so that
301 variables created with "set" persist to the DATA ACL. Also (at any time)
302 DNS lookups that fail create cache records using the Permanent pool. But
303 expansions release any allocations made on the current pool - so a dnsdb
304 lookup expansion done in the DKIM ACL releases the memory used for the
305 DNS negative-cache, and bad things result. Solution is to switch to the
306 Main pool for expansions.
307 While we're in that code, add checks on the DNS cache during store_reset,
308 active in the testsuite.
309 Problem spotted, and debugging aided, by Wolfgang Breyha.
311 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
312 When none of the hosts presented to a transport match an already-open
313 connection, close it and proceed with the list. Previously we would
314 queue the message. Spotted by Lena with Yahoo, probably involving
317 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
318 Previously a spurious "250 OK id=" response was appended to the proper
321 JH/08 The "support for" informational output now, which built with Content
322 Scanning support, has a line for the malware scanner interfaces compiled
323 in. Interface can be individually included or not at build time.
325 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
326 by the template makefile "src/EDITME". The "STREAM" support for an older
327 ClamAV interface method is removed.
329 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
330 rows affected is given instead).
332 JH/11 The runtime Berkeley DB library version is now additionally output by
333 "exim -d -bV". Previously only the compile-time version was shown.
335 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
336 SMTP connection. Previously, when one had more receipients than the
337 first, an abortive onward connection was made. Move to full support for
338 multiple onward connections in sequence, handling cutthrough connection
339 for all multi-message initiating connections.
341 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
342 routers. Previously, a multi-recipient message would fail to match the
343 onward-connection opened for the first recipient, and cause its closure.
345 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
346 a timeout on read on a GnuTLS initiating connection, resulting in the
347 initiating connection being dropped. This mattered most when the callout
348 was marked defer_ok. Fix to keep the two timeout-detection methods
351 JH/15 Relax results from ACL control request to enable cutthrough, in
352 unsupported situations, from error to silently (except under debug)
353 ignoring. This covers use with PRDR, frozen messages, queue-only and
356 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
358 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
359 metadata, resulting in a crash in free().
361 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
362 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
363 Broken also in d185889f4, with init system revamp.
365 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
366 Previously we abruptly closed the connection after reading a malware-
367 found indication; now we go on to read the "scan ok" response line,
370 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
371 ACL. Previously, a crash would result.
373 JH/19 Speed up macro lookups during configuration file read, by skipping non-
374 macro text after a replacement (previously it was only once per line) and
375 by skipping builtin macros when searching for an uppercase lead character.
377 JH/20 DANE support moved from Experimental to mainline. The Makefile control
378 for the build is renamed.
380 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
381 was allocated for every new TLS startup, meaning one per message. Fix
382 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
384 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
385 reported the original. Fix to report (as far as possible) the ACL
386 result replacing the original.
388 JH/23 Fix memory leak during multi-message connections using STARTTLS under
389 OpenSSL. Certificate information is loaded for every new TLS startup,
390 and the resources needed to be freed.
392 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
394 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
397 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
398 DATA response info to the (existing) per-recipient response info for
399 the "C=" log element. It can have useful tracking info from the
400 destination system. Patch from Simon Arlott.
402 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
403 length value. Previously this would segfault.
405 HS/02 Support Avast multiline protoocol, this allows passing flags to
406 newer versions of the scanner.
408 JH/28 Ensure that variables possibly set during message acceptance are marked
409 dead before release of memory in the daemon loop. This stops complaints
410 about them when the debug_store option is enabled. Discovered specifically
411 for sender_rate_period, but applies to a whole set of variables.
412 Do the same for the queue-runner and queue-list loops, for variables set
413 from spool message files. Do the same for the SMTP per-message loop, for
414 certain variables indirectly set in ACL operations.
416 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
417 as a multi-recipient message from a mailinglist manager). The coding had
418 an arbitrary cutoff number of characters while checking for more input;
419 enforced by writing a NUL into the buffer. This corrupted long / fast
420 input. The problem was exposed more widely when more pipelineing of SMTP
421 responses was introduced, and one Exim system was feeding another.
422 The symptom is log complaints of SMTP syntax error (NUL chars) on the
423 receiving system, and refused recipients seen by the sending system
424 (propating to people being dropped from mailing lists).
425 Discovered and pinpointed by David Carter.
427 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
428 replaced by the ${authresults } expansion.
430 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
432 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
433 allows proper process termination in container environments.
435 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
436 Previously the "final dot" had a newline after it; ensure it is CR,LF.
438 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
439 and "err_perm", deprecated since 4.83 when the RFC-defined words
440 "temperror" and "permerror" were introduced.
442 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
443 transport-filters or DKIM-signing. The restriction was lost in the
444 consolidation of verify-callout and delivery SMTP handling.
445 Extend the restriction to also cover ARC-signing.
447 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
448 in defer=pass mode supply a 450 to the initiator. Previously the message
451 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
452 tls_require_ciphers is used as before.
454 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
455 "pass_unscanned". Only tmpfails from the scanner are written to
456 the paniclog, as they may require admin intervention (permission
457 denied, license issues). Other scanner errors (like decompression
458 bombs) do not cause a paniclog entry.
460 JH/36 Fix reinitialisation of DKIM logging variable between messages.
461 Previously it was possible to log spurious information in receive log
464 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
465 triggered odd behaviour from Outlook Express clients.
467 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
470 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
471 since the IETF WG has not yet settled on that versus the original
472 "bare" representation.
474 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
475 Previously the millisecond value corrupted the output.
476 Fix also for syslog_pid=no and log_selector +pid, for which the pid
477 corrupted the output.
483 JH/01 Rework error string handling in TLS interface so that the caller in
484 more cases is responsible for logging. This permits library-sourced
485 string to be attached to addresses during delivery, and collapses
486 pairs of long lines into single ones.
488 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
489 during configuration. Wildcards are allowed and expanded.
491 JH/02 Rework error string handling in DKIM to pass more info back to callers.
492 This permits better logging.
494 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
495 do not close it down and have the child transport start it up again on
496 the passed-on TCP connection. Instead, proxy the child (and any
497 subsequent ones) for TLS via a unix-domain socket channel. Logging is
498 affected: the continued delivery log lines do not have any DNSSEC, TLS
499 Certificate or OCSP information. TLS cipher information is still logged.
501 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
502 identical IP addresses on different listening ports. Will also affect
505 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
506 add noisy ifdef guards to special-case this sillyness.
507 Patch from Bernd Kuhls.
509 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
510 than 255 are no longer allowed.
512 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
513 Disable the session-cache too, which might reduce our load. Since we
514 currrectly use a new context for every connection, both as server and
515 client, there is no benefit for these.
516 GnuTLS appears to not support tickets server-side by default (we don't
517 call gnutls_session_ticket_enable_server()) but client side is enabled
518 by default on recent versions (3.1.3 +) unless the PFS priority string
521 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
522 <https://reproducible-builds.org/specs/source-date-epoch/>.
524 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
525 the check for any unsuccessful recipients did not notice the limit, and
526 erroneously found still-pending ones.
528 JH/08 Pipeline CHUNKING command and data together, on kernels that support
529 MSG_MORE. Only in-clear (not on TLS connections).
531 JH/09 Avoid using a temporary file during transport using dkim. Unless a
532 transport-filter is involved we can buffer the headers in memory for
533 creating the signature, and read the spool data file once for the
534 signature and again for transmission.
536 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
537 4.77 as the kernel support then wasn't solid, having issues in 64bit
538 mode. Now, it's been long enough. Add support for FreeBSD also.
540 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
541 case where the routing stage had gathered several addresses to send to
542 a host before calling the transport for the first, we previously failed
543 to close down TLS in the old transport process before passing the TCP
544 connection to the new process. The new one sent a STARTTLS command
545 which naturally failed, giving a failed delivery and bloating the retry
546 database. Investigation and fix prototype from Wolfgang Breyha.
548 JH/12 Fix check on SMTP command input synchronisation. Previously there were
549 false-negatives in the check that the sender had not preempted a response
550 or prompt from Exim (running as a server), due to that code's lack of
551 awareness of the SMTP input buffering.
553 PP/04 Add commandline_checks_require_admin option.
554 Exim drops privileges sanely, various checks such as -be aren't a
555 security problem, as long as you trust local users with access to their
556 own account. When invoked by services which pass untrusted data to
557 Exim, this might be an issue. Set this option in main configuration
558 AND make fixes to the calling application, such as using `--` to stop
561 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
562 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
563 responses to those, into a single TLS record each way (this usually means
564 a single packet). As a side issue, smtp_enforce_sync now works on TLS
567 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
568 affects you only if you're dancing at the edge of the param size limits.
569 If you are, and this message makes sense to you, then: raise the
570 configured limit or use OpenSSL 1.1. Nothing we can do for older
573 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
574 cmdline element to get the documented default one. Previously it was
577 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
578 are unsuable for non-message-specific reasons - eg. connection timeout,
579 banner-time rejection.
581 JH/16 Fix logging of delivery remote port, when specified by router, under
584 PP/06 Repair manualroute's ability to take options in any order, even if one
585 is the name of a transport.
588 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
590 JH/17 Change the list-building routines interface to use the expanding-string
591 triplet model, for better allocation and copying behaviour.
593 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
594 Previously it was constructed the first time a possibly-matching string
595 was met in the configuration file input during startup; now it is done
598 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
599 compatible one, to avoid the (poorly documented) possibility of a config
600 file in the working directory redirecting the DB files, possibly correpting
601 some existing file. CVE-2017-10140 assigned for BDB.
603 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
604 cache-hot. Previously, although the result was properly cached, the
605 initial verify call returned a defer.
607 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
608 the main verify for receipient in uncached-mode.
610 JH/22 Retire historical build files to an "unsupported" subdir. These are
611 defined as "ones for which we have no current evidence of testing".
613 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
614 if present. Previously it was ignored.
616 JH/24 Start using specified-initialisers in C structure init coding. This is
617 a C99 feature (it's 2017, so now considered safe).
619 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
620 if was a fixed-sized field and bitmask ops via macros; it is now more
623 PP/07 GitHub PR 56: Apply MariaDB build fix.
624 Patch provided by Jaroslav Škarvada.
626 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
627 during Coverity cleanups [4.87 JH/47]
628 Diagnosis and fix provided by Michael Fischer v. Mollard.
630 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
631 the right size to place the terminating semicolon on its own folded
632 line, the header hash was calculated to an incorrect value thanks to
633 the (relaxed) space the fold became.
635 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
636 and confused the parent.
638 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
639 which could crash as a result. This could lead to undeliverable messages.
641 JH/28 Logging: "next input sent too soon" now shows where input was truncated
644 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
645 matters on fast-turnover and PID-randomising systems, which were getting
646 out-of-order delivery.
648 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
649 a possibly-overlapping copy. The symptom was that "Remote host closed
650 connection in response to HELO" was logged instead of the actual 4xx
653 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
654 Previously only that bufferd was discarded, resulting in SYMTP command
657 JH/32 DKIM: when a message has multiple signatures matching an identity given
658 in dkim_verify_signers, run the dkim acl once for each. Previously only
659 one run was done. Bug 2189.
661 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
662 "panic the current process" to "deliberately defer". The panic log is
663 still written with the problem list name; the mail and reject logs now
664 get a temp-reject line for the message that was being handled, saying
665 something like "domains check lookup or other defer". The SMTP 451
666 message is still "Temporary local problem".
668 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
669 A crafted sequence of BDAT commands could result in in-use memory beeing
670 freed. CVE-2017-16943.
672 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
673 from SMTP input. Previously it was always done; now only done for DATA
674 and not BDAT commands. CVE-2017-16944.
676 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
677 to the message (such as an overlong header line). Previously this was
678 not done and we did not exit BDAT mode. Followon from the previous item
679 though a different problem.
685 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
686 than -2003 did; needs libidn2 in addition to libidn.
688 JH/02 The path option on a pipe transport is now expanded before use.
690 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
691 Patch provided by "Björn", documentation fix added too.
693 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
694 missing a wire-to-host endian conversion.
696 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
697 close after a BDAT command line could be taken as a following command,
698 giving a synch failure. Fix by only checking for synch immediately
699 before acknowledging the chunk.
701 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
702 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
703 macro. Patches provided by Josh Soref.
705 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
706 Previously we did not; the RFC seems ambiguous and VRFY is not listed
707 by IANA as a service extension. However, John Klensin suggests that we
710 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
711 the dkim code may be unix-mode line endings rather than smtp wire-format
712 CRLF, so prepend a CR to any bare LF.
714 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
715 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
717 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
718 the first were themselves being wrongly included in the feed into dkim
719 processing; with most chunk sizes in use this resulted in an incorrect
720 body hash calculated value.
722 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
723 DKIM signature block, for verification. Although advised against by
724 standards it is specifically not ruled illegal.
726 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
728 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
729 missing a body hash (the bh= tag).
731 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
732 It seems that HAProxy sends the Proxy Protocol information in clear and
733 only then does a TLS startup, so do the same.
735 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
736 TCP connections (such as for Spamd) unless the daemon successfully set
737 Fast Open mode on its listening sockets. This fixes breakage seen on
738 too-old kernels or those not configured for Fast Open, at the cost of
739 requiring both directions being enabled for TFO, and TFO never being used
740 by non-daemon-related Exim processes.
742 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
743 endings, at least on the first header line. Try to canonify any that get
744 past that check, despite the cost.
746 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
747 now limited to an arbitrary five deep, while parsing addresses with the
748 strip_excess_angle_brackets option enabled.
750 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
751 instead leave the unprompted TLS handshake in socket buffer for the
752 TLS library to consume.
754 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
756 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
758 JH/16 Drop variables when they go out of scope. Memory management drops a whole
759 region in one operation, for speed, and this leaves assigned pointers
760 dangling. Add checks run only under the testsuite which checks all
761 variables at a store-reset and panics on a dangling pointer; add code
762 explicitly nulling out all the variables discovered. Fixes one known
763 bug: a transport crash, where a dangling pointer for $sending_ip_address
764 originally assigned in a verify callout, is re-used.
766 PP/06 Drop '.' from @INC in various Perl scripts.
768 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
770 PP/08 Reduce a number of compilation warnings under clang; building with
771 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
772 should be warning-free.
774 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
776 HS/01 Fix portability problems introduced by PP/08 for platforms where
777 realloc(NULL) is not equivalent to malloc() [SunOS et al].
779 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
780 chunk. This allows us to accept broken chunked messages. We need a more
781 general solution here.
783 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
784 already-broken messages in the queue.
786 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
788 JH/19 Fix reference counting bug in routing-generated-address tracking.
794 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
795 supports it and a size is available (ie. the sending peer gave us one).
797 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
798 years of being deprecated). The replacements are the ACLs
799 acl_smtp_mime and acl_not_smtp_mime.
801 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
802 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
803 or even an in-clear connection were permitted. Now, if the host lookup
804 was dnssec and dane was requested then the host is only used if the
805 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
806 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
807 if one fails this test.
808 This means that a poorly-configured remote DNS will make it incommunicado;
809 but it protects against a DNS-interception attack on it.
811 JH/04 Bug 1810: make continued-use of an open smtp transport connection
812 non-noisy when a race steals the message being considered.
814 JH/05 If main configuration option tls_certificate is unset, generate a
815 self-signed certificate for inbound TLS connections.
817 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
818 in rewrites and routers.
820 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
821 and logged a warning sing 4.83; now they are a configuration file error.
823 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
824 (lacking @domain). Apply the same qualification processing as RCPT.
826 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
828 JH/10 Support ${sha256:} applied to a string (as well as the previous
831 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
832 a cutthrough deliver is pending, as we always want to make a connection.
833 This also avoids re-routing the message when later placing the cutthrough
834 connection after a verify cache hit.
835 Do not update it with the verify result either.
837 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
838 when routing results in more than one destination address.
840 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
841 signing (which inhibits the cutthrough capability). Previously only
842 the presence of an option was tested; now an expansion evaluating as
843 empty is permissible (obviously it should depend only on data available
844 when the cutthrough connection is made).
846 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
847 the relevant preceding SMTP command did not note the pipelining mode.
849 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
850 Previously they were not counted.
852 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
853 as one having no matching records. Previously we deferred the message
854 that needed the lookup.
856 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
857 distinguished as "(=".
859 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
860 for missing MX records. Previously it only worked for missing A records.
862 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
864 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
865 after the data-go-ahead and data-ack. Patch from Jason Betts.
867 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
868 even for a "none" policy. Patch from Tony Meyer.
870 JH/22 Fix continued use of a connection for further deliveries. If a port was
871 specified by a router, it must also match for the delivery to be
874 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
875 When one of the recipients of a message was unsuitable for the connection
876 (has no matching addresses), we lost track of needing to mark it
877 deferred. As a result mail would be lost.
879 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
881 JH/25 Decoding ACL controls is now done using a binary search; the source code
882 takes up less space and should be simpler to maintain. Merge the ACL
883 condition decode tables also, with similar effect.
885 JH/26 Fix problem with one_time used on a redirect router which returned the
886 parent address unchanged. A retry would see the parent address marked as
887 delivered, so not attempt the (identical) child. As a result mail would
890 JH/27 Fix a possible security hole, wherein a process operating with the Exim
891 UID can gain a root shell. Credit to http://www.halfdog.net/ for
892 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
895 JH/28 Enable {spool,log} filesystem space and inode checks as default.
896 Main config options check_{log,spool}_{inodes,space} are now
897 100 inodes, 10MB unless set otherwise in the configuration.
899 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
900 Previously it only applied to the main-section connection policy
903 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
905 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
906 by me. Added RFC7919 DH primes as an alternative.
908 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
909 are not in the system include path.
911 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
912 GnuTLS, when a session startup failed (eg because the client disconnected)
913 Exim did stdio operations after fclose. This was exposed by a recent
914 change which nulled out the file handle after the fclose.
916 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
917 signed directly by the cert-signing cert, rather than an intermediate
918 OCSP-signing cert. This is the model used by LetsEncrypt.
920 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
922 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
923 an incoming connection.
925 HS/02 Bug 1802: Do not half-close the connection after sending a request
928 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
929 fallback to "prime256v1".
931 JH/34 SECURITY: Use proper copy of DATA command in error message.
932 Could leak key material. Remotely exploitable. CVE-2016-9963.
938 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
939 and 3.4.4 - once the server is enabled to respond to an OCSP request
940 it does even when not requested, resulting in a stapling non-aware
941 client dropping the TLS connection.
943 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
944 support variable-length bit vectors. No functional change.
946 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
947 The I= interface field on outgoing lines is now after the H= remote
948 host field, same as incoming lines. There is a separate
949 outgoing_interface log selector which allows you to disable the
952 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
953 If not running log_selector +smtp_connection the mainlog would be held
954 open indefinitely after a "too many connections" event, including to a
955 deleted file after a log rotate. Leave the per net connection logging
956 leaving it open for efficiency as that will be quickly detected by the
957 check on the next write.
959 HS/01 Bug 1671: Fix post transport crash.
960 Processing the wait-<transport> messages could crash the delivery
961 process if the message IDs didn't exist for some reason. When
962 using 'split_spool_directory=yes' the construction of the spool
963 file name failed already, exposing the same netto behaviour.
965 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
966 mime_regex ACL conditions.
968 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
969 to DSN fail messages (bounces): remote IP, remote greeting, remote response
970 to HELO, local diagnostic string.
972 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
973 log line to debug. Even when configured with a tls authenticator many
974 client connections are expected to not authenticate in this way, so
975 an authenticate fail is not an error.
977 HS/02 Add the Exim version string to the process info. This way exiwhat
978 gives some more detail about the running daemon.
980 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
981 matter for fast-change records such as DNSBLs.
983 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
984 retry record, even if constant. There may be multiple transports with
985 different interface settings and the retry behaviour needs to be kept
988 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
990 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
992 JH/10 Bug 840: fix log_defer_output option of pipe transport
994 JH/11 Bug 830: use same host for all RCPTS of a message, even under
995 hosts_randomize. This matters a lot when combined with mua_wrapper.
997 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
998 ${quote_pgsql:<string>} operator.
1000 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1002 JH/14 Change header file name for freeradius-client. Relevant if compiling
1003 with Radius support; from the Gentoo tree and checked under Fedora.
1005 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1007 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1008 option transport_filter, meaning no filtering.
1010 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1012 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1013 defaults to "*" (all hosts). The variable is now available when not built
1014 with TLS, default unset, mainly to enable keeping the testsuite sane.
1015 If a server certificate is not supplied (via tls_certificate) an error is
1016 logged, and clients will find TLS connections fail on startup. Presumably
1017 they will retry in-clear.
1018 Packagers of Exim are strongly encouraged to create a server certificate
1019 at installation time.
1021 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1022 with the $config_file variable.
1024 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1025 in transport context, after the attempt, and per-recipient. The latter type
1026 is per host attempted. The event data is the error message, and the errno
1027 information encodes the lookup type (A vs. MX) used for the (first) host,
1028 and the trailing two digits of the smtp 4xx response.
1030 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1031 to write to mainlog (or rejectlog, paniclog) in the window between file
1032 creation and permissions/ownership being changed. Particularly affects
1033 installations where exicyclog is run as root, rather than exim user;
1034 result is that the running daemon panics and dies.
1036 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1038 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1039 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1040 "pri" and "weight". Note that the previous implicit priority given by the
1041 list order is no longer honoured.
1043 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1044 for DKIM processing.
1046 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1047 by defining SUPPORT_SOCKS.
1049 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1050 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1051 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1052 variables are renamed to proxy_{local,external}_{address,port}.
1054 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1055 for a build by defining SUPPORT_I18N
1057 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1058 of the query string, and make ${quote_redis:} do that quoting.
1060 JH/29 Move Events support from Experimental to mainline, enabled by default
1061 and removable for a build by defining DISABLE_EVENT.
1063 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1065 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1066 cached by the daemon.
1068 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1069 by defining LOOKUP_REDIS. The libhiredis library is required.
1071 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1072 keys are given for lookup.
1074 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1075 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1076 only supported when built with TLS support. The PolarSSL SHA routines
1077 are still used when the TLS library is too old for convenient support.
1079 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1080 openssl_options), for security. OpenSSL forces this from version 1.1.0
1081 server-side so match that on older versions.
1083 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1084 allocation for $value could be released as the expansion processing
1085 concluded, but leaving the global pointer active for it.
1087 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1088 and to use the domains and local_parts ACL conditions.
1090 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1091 incorrectly not doubled on cutthrough transmission, hence seen as a
1092 body-termination at the receiving system - resulting in truncated mails.
1093 Commonly the sender saw a TCP-level error, and retransmitted the message
1094 via the normal store-and-forward channel. This could result in duplicates
1095 received - but deduplicating mailstores were liable to retain only the
1096 initial truncated version.
1098 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1100 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1102 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1103 we're in there, support oversigning also; bug 1309.
1105 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1107 HS/04 Add support for keep_environment and add_environment options.
1109 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1110 either intentional arithmetic overflow during PRNG, or testing config-
1113 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1114 delivery resulted in actual delivery. Cancel cutthrough before DATA
1117 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1118 rejects a recipient: pass the reject to the originator.
1120 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1121 Many were false-positives and ignorable, but it's worth fixing the
1124 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1125 for the new environment-manipulation done at startup. Move the routines
1126 from being local to tls.c to being global via the os.c file.
1128 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1129 an extract embedded as result-arg for a map, the first arg for extract
1130 is unavailable so we cannot tell if this is a numbered or keyed
1131 extraction. Accept either.
1137 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1140 JH/02 The smtp transport option "multi_domain" is now expanded.
1142 JH/03 The smtp transport now requests PRDR by default, if the server offers
1145 JH/04 Certificate name checking on server certificates, when exim is a client,
1146 is now done by default. The transport option tls_verify_cert_hostnames
1147 can be used to disable this per-host. The build option
1148 EXPERIMENTAL_CERTNAMES is withdrawn.
1150 JH/05 The value of the tls_verify_certificates smtp transport and main options
1151 default to the word "system" to access the system default CA bundle.
1152 For GnuTLS, only version 3.0.20 or later.
1154 JH/06 Verification of the server certificate for a TLS connection is now tried
1155 (but not required) by default. The verification status is now logged by
1156 default, for both outbound TLS and client-certificate supplying inbound
1159 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1162 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1163 Status Notification (bounce) messages are now MIME format per RFC 3464.
1164 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1165 under the control of the dsn_advertise_hosts option, and routers may
1166 have a dsn_lasthop option.
1168 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1169 default, modifiable by a malware= option. The list separator for
1170 the options can now be changed in the usual way. Bug 68.
1172 JH/10 The smtp_receive_timeout main option is now expanded before use.
1174 JH/11 The incoming_interface log option now also enables logging of the
1175 local interface on delivery outgoing connections.
1177 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1178 if the interface and destination host and port all match.
1180 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1183 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1184 Patch from Andrew Lewis.
1186 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1187 now supports optional time-restrictions, weighting, and priority
1188 modifiers per server. Patch originally by <rommer@active.by>.
1190 JH/16 The spamd_address main option now supports a mixed list of local
1191 and remote servers. Remote servers can be IPv6 addresses, and
1192 specify a port-range.
1194 JH/17 Bug 68: The spamd_address main option now supports an optional
1195 timeout value per server.
1197 JH/18 Bug 1581: Router and transport options headers_add/remove can
1198 now have the list separator specified.
1200 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1203 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1206 JH/21 Support for the A6 type of dns record is withdrawn.
1208 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1209 rather than the verbs used.
1211 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1212 from 255 to 1024 chars.
1214 JH/24 Verification callouts now attempt to use TLS by default.
1216 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1217 are generic router options now. The defaults didn't change.
1219 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1220 Original patch from Alexander Shikoff, worked over by JH.
1222 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1223 files if ZCAT_COMMAND is not executable.
1225 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1227 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1229 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1230 Normally benign, it bites when the pair was led to by a CNAME;
1231 modern usage is to not canonicalize the domain to a CNAME target
1232 (and we were inconsistent anyway for A-only vs AAAA+A).
1234 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1236 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1237 when evaluating $sender_host_dnssec.
1239 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1240 $sender_helo_dnssec variable.
1242 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1244 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1246 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1248 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1249 documented as working, but never had. Support all but $spam_report.
1251 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1252 added for tls authenticator.
1254 HS/03 Add perl_taintmode main config option
1260 TL/01 When running the test suite, the README says that variables such as
1261 no_msglog_check are global and can be placed anywhere in a specific
1262 test's script, however it was observed that placement needed to be near
1263 the beginning for it to behave that way. Changed the runtest perl
1264 script to read through the entire script once to detect and set these
1265 variables, reset to the beginning of the script, and then run through
1266 the script parsing/test process like normal.
1268 TL/02 The BSD's have an arc4random API. One of the functions to induce
1269 adding randomness was arc4random_stir(), but it has been removed in
1270 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1271 function when detected.
1273 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1274 cause callback expansion.
1276 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1277 syntax errors in an expansion can be treated as a string instead of
1278 logging or causing an error, due to the internal use of bool_lax
1279 instead of bool when processing it.
1281 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1282 server certificates when making smtp deliveries.
1284 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1286 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1288 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1290 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1291 Merged patch from Sebastian Wiedenroth.
1293 JH/05 Fix results-pipe from transport process. Several recipients, combined
1294 with certificate use, exposed issues where response data items split
1295 over buffer boundaries were not parsed properly. This eventually
1296 resulted in duplicates being sent. This issue only became common enough
1297 to notice due to the introduction of connection certificate information,
1298 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1300 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1301 size buffer was used, resulting in syntax errors when an expansion
1304 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1305 version 3.3.6 or later.
1307 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1308 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1309 both become "event_action", the variables become $event_name, $event_data
1310 and $event_defer_errno. There is a new variable $verify_mode, usable in
1311 routers, transports and related events. The tls:cert event is now also
1312 raised for inbound connections, if the main configuration event_action
1315 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1316 early OCSP support, but no stapling (appears to be less than 1.0.0).
1318 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1319 server certificate names available under the smtp transport option
1320 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1323 JH/10 Time-related extraction expansions from certificates now use the main
1324 option "timezone" setting for output formatting, and are consistent
1325 between OpenSSL and GnuTLS compilations. Bug 1541.
1327 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1328 encoded parameter in the incoming message. Bug 1558.
1330 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1331 include certificate info, eximon was claiming there were spoolfile
1334 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1336 JH/14 Log delivery-related information more consistently, using the sequence
1337 "H=<name> [<ip>]" wherever possible.
1339 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1340 are problematic for Debian distribution, omit them from the release
1343 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1345 JH/16 Fix string representation of time values on 64bit time_t architectures.
1348 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1349 output list separator was used.
1354 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1355 checkers that were complaining about end of non-void function with no
1358 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1359 This was a regression introduced in 4.83 by another bugfix.
1361 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1363 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1364 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1370 TF/01 Correctly close the server side of TLS when forking for delivery.
1372 When a message was received over SMTP with TLS, Exim failed to clear up
1373 the incoming connection properly after forking off the child process to
1374 deliver the message. In some situations the subsequent outgoing
1375 delivery connection happened to have the same fd number as the incoming
1376 connection previously had. Exim would try to use TLS and fail, logging
1377 a "Bad file descriptor" error.
1379 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1380 utilities have not been installed.
1382 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1383 temporary space as the ACL may create new global variables.
1385 TL/01 LDAP support uses per connection or global context settings, depending
1386 upon the detected version of the libraries at build time.
1388 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1389 to extract and use the src ip:port in logging and expansions as if it
1390 were a direct connection from the outside internet. PPv2 support was
1391 updated based on HAProxy spec change in May 2014.
1393 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1395 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1396 Properly escape header and check for NULL return.
1398 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1401 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1403 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1404 characters in header names, implemented as a verify condition.
1405 Contributed by Michael Fischer v. Mollard.
1407 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1408 results permerror and temperror. Previous values are deprecated but
1409 still accepted. In a future release, err_perm and err_temp will be
1410 completely removed, which will be a backward incompatibility if the
1411 ACL tests for either of these two old results. Patch contributed by
1412 user bes-internal on the mailing list.
1414 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1416 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1417 selectors, in both main and reject logs.
1419 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1422 JH/07 Add malware type "sock" for talking to simple daemon.
1424 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1426 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1427 routers/transports under cutthrough routing.
1429 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1430 numbers. Touch up "bool" conditional to keep the same definition.
1432 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1434 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1436 JH/12 Expand items in router/transport headers_add or headers_remove lists
1437 individually rather than the list as a whole. Bug 1452.
1439 Required for reasonable handling of multiple headers_ options when
1440 they may be empty; requires that headers_remove items with embedded
1441 colons must have them doubled (or the list-separator changed).
1443 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1444 view the policy declared in the DMARC record. Currently, $dmarc_status
1445 is a combined value of both the record presence and the result of the
1448 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1450 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1451 dnslookup router and the smtp transport (applying to the forward
1454 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1455 of ldap servers used for a specific lookup. Patch provided by Heiko
1458 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1459 New variable $lookup_dnssec_authenticated for observability.
1461 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1462 Patch submitted by Lars Timman.
1464 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1466 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1467 Requires trusted mode and valid format message id, aborts otherwise.
1468 Patch contributed by Heiko Schlichting.
1470 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1471 certextract with support for various fields. Bug 1358.
1473 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1474 is requested by default, modifiable by smtp transport option
1477 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1478 operate on certificate variables to give certificate fingerprints
1479 Also new ${sha256:cert_variable}.
1481 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1483 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1484 Christian Aistleitner.
1486 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1488 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1489 file. Patch from Wolfgang Breyha.
1491 JH/25 Expand the coverage of the delivery $host and $host_address to
1492 client authenticators run in verify callout. Bug 1476.
1494 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1495 align with daemon_smtp_ports. Bug 72.
1497 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1498 support and error reporting did not work properly.
1500 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1501 and is readable. Patch from Andrew Colin Kissa.
1503 TL/14 Enhance documentation of ${run expansion and how it parses the
1504 commandline after expansion, particularly in the case when an
1505 unquoted variable expansion results in an empty value.
1507 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1509 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1510 by renaming away from it. Addresses GH issue 15, reported by
1513 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1515 TL/15 SECURITY: prevent double expansion in math comparison functions
1516 (can expand unsanitized data). Not remotely exploitable.
1523 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1525 PP/02 Make -n do something, by making it not do something.
1526 When combined with -bP, the name of an option is not output.
1528 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1531 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1532 $sender_host_name and config options to manage this, and basic check
1535 PP/05 DSCP support for outbound connections and control modifier for inbound.
1537 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1538 (Only plugin which currently uses this is kerberos4, which nobody should
1539 be using, but we should make it available and other future plugins might
1540 conceivably use it, even though it would break NAT; stuff *should* be
1541 using channel bindings instead).
1543 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1544 name; added for Sendmail compatibility; requires admin caller.
1545 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1546 just ignore it); requires trusted caller.
1547 Also parse but ignore: -Ac -Am -X<logfile>
1550 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1552 TL/02 Add +smtp_confirmation as a default logging option.
1554 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1555 Patch by Magnus Holmgren from 2007-02-20.
1557 TL/04 Bugzilla 1281 - Spec typo.
1558 Bugzilla 1283 - Spec typo.
1559 Bugzilla 1290 - Spec grammar fixes.
1561 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1563 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1565 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1566 mailing list by by Dmitry Isaikin.
1568 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1570 JH/02 Support "G" suffix to numbers in ${if comparisons.
1572 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1574 NM/01 Bugzilla 1197 - Spec typo
1575 Bugzilla 1196 - Spec examples corrections
1577 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1579 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1580 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1583 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1584 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1586 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1587 "acl {{name}{arg}...}", and optional args on acl condition
1590 JH/05 Permit multiple router/transport headers_add/remove lines.
1592 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1594 JH/07 Avoid using a waiting database for a single-message-only transport.
1595 Performance patch from Paul Fisher. Bugzilla 1262.
1597 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1600 JH/09 Add $headers_added variable, with content from use of ACL modifier
1601 add_header (but not yet added to the message). Bugzilla 199.
1603 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1604 Pulled from Bugzilla 817 by Wolfgang Breyha.
1606 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1608 (nb: this is the same fix as in Exim 4.80.1)
1610 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1613 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1616 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1618 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1619 advertise SMTP AUTH mechanism to us, instead of a generic
1620 protocol violation error. Also, make Exim more robust to bad
1621 data from the Dovecot auth socket.
1623 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1625 When a queue runner is handling a message, Exim first routes the
1626 recipient addresses, during which it prunes them based on the retry
1627 hints database. After that it attempts to deliver the message to
1628 any remaining recipients. It then updates the hints database using
1631 So if a recipient address works intermittently, it can get repeatedly
1632 deferred at routing time. The retry hints record remains fresh so the
1633 address never reaches the final cutoff time.
1635 This is a fairly common occurrence when a user is bumping up against
1636 their storage quota. Exim had some logic in its local delivery code
1637 to deal with this. However it did not apply to per-recipient defers
1638 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1640 This change adds a proper retry rule check during routing so that the
1641 final cutoff time is checked against the message's age. We only do
1642 this check if there is an address retry record and there is not a
1643 domain retry record; this implies that previous attempts to handle
1644 the address had the retry_use_local_parts option turned on. We use
1645 this as an approximation for the destination being like a local
1646 delivery, as in LMTP.
1648 I suspect this new check makes the old local delivery cutoff check
1649 redundant, but I have not verified this so I left the code in place.
1651 TF/02 Correct gecos expansion when From: is a prefix of the username.
1653 Test 0254 submits a message to Exim with the header
1657 When I ran the test suite under the user fanf2, Exim expanded
1658 the header to contain my full name, whereas it should have added
1659 a Resent-Sender: header. It erroneously treats any prefix of the
1660 username as equal to the username.
1662 This change corrects that bug.
1664 GF/01 DCC debug and logging tidyup
1665 Error conditions log to paniclog rather than rejectlog.
1666 Debug lines prefixed by "DCC: " to remove any ambiguity.
1668 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1670 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1671 Bug spotted by Jeremy Harris; was flawed since initial commit.
1672 Would have resulted in OCSP responses post-SNI triggering an Exim
1673 NULL dereference and crash.
1675 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1677 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1678 Bug detection, analysis and fix by Samuel Thibault.
1679 Bugzilla 1331, Debian bug #698092.
1681 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1683 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1684 Server implementation by Todd Lyons, client by JH.
1685 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1686 config variable "prdr_enable" controls whether the server
1687 advertises the facility. If the client requests PRDR a new
1688 acl_data_smtp_prdr ACL is called once for each recipient, after
1689 the body content is received and before the acl_smtp_data ACL.
1690 The client is controlled by both of: a hosts_try_prdr option
1691 on the smtp transport, and the server advertisement.
1692 Default client logging of deliveries and rejections involving
1693 PRDR are flagged with the string "PRDR".
1695 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1696 fclose(). Diagnosis by Todd Lyons.
1698 PP/17 Update configure.default to handle IPv6 localhost better.
1699 Patch by Alain Williams (plus minor tweaks).
1702 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1703 This is now consistent with GnuTLS, and is now documented: the
1704 previous undocumented portable approach to treating the option as
1705 unset was to force an expansion failure. That still works, and
1706 an empty string is now equivalent.
1708 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1709 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1710 not performing validation itself.
1712 PP/20 Added force_command boolean option to pipe transport.
1713 Patch from Nick Koston, of cPanel Inc.
1715 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1718 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1720 PP/21 Fix eximon continuous updating with timestamped log-files.
1721 Broken in a format-string cleanup in 4.80, missed when I repaired the
1722 other false fix of the same issue.
1723 Report and fix from Heiko Schlichting.
1726 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1727 Report from Prashanth Katuri.
1729 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1730 It's SecureTransport, so affects any MacOS clients which use the
1731 system-integrated TLS libraries, including email clients.
1733 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1734 using a MIME ACL for non-SMTP local injection.
1735 Report and assistance in diagnosis by Warren Baker.
1737 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1739 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1741 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1742 last id that failed so it may be referenced in subsequent ACL's.
1744 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1747 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1748 ldap library initialization, allowing self-signed CA's to be
1749 used. Also properly sets require_cert option later in code by
1750 using NULL (global ldap config) instead of ldap handle (per
1751 session). Bug diagnosis and testing by alxgomz.
1753 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1754 the src/util/ subdirectory.
1756 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1757 renamed to Transport Post Delivery Action by Jeremy Harris, as
1760 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1761 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1762 redis_servers = needs to be configured which will be used by the redis
1763 lookup. Patch from Warren Baker, of The Packet Hub.
1765 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1767 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1768 hostname or reverse DNS when processing a host list. Used suggestions
1769 from multiple comments on this bug.
1771 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1773 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1774 Missed a few lines, added it to make the runtest require no keyboard
1777 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1778 contains upper case chars. Make router use caseful_local_part.
1780 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1781 support when GnuTLS has been built with p11-kit.
1787 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1789 This, or similar/improved, will also be change PP/11 of 4.82.
1795 PP/01 Handle short writes when writing local log-files.
1796 In practice, only affects FreeBSD (8 onwards).
1797 Bugzilla 1053, with thanks to Dmitry Isaikin.
1799 NM/01 Bugzilla 949 - Documentation tweak
1801 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1804 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1806 PP/02 Implemented gsasl authenticator.
1808 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1810 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1811 `pkg-config foo` for cflags/libs.
1813 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1814 with rest of GSASL and with heimdal_gssapi.
1816 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1817 `pkg-config foo` for cflags/libs for the TLS implementation.
1819 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1820 properties get this fed in as external SSF. A number of robustness
1821 and debugging improvements to the cyrus_sasl authenticator.
1823 PP/08 cyrus_sasl server now expands the server_realm option.
1825 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1826 Patch by Jeremy Harris.
1828 PP/10 Added dbmjz lookup type.
1830 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1832 PP/12 MAIL args handles TAB as well as SP, for better interop with
1833 non-compliant senders.
1834 Analysis and variant patch by Todd Lyons.
1836 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1837 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1838 Patch from Dirk Mueller <dmueller@suse.com>
1840 PP/13 tls_peerdn now print-escaped for spool files.
1841 Observed some $tls_peerdn in wild which contained \n, which resulted
1842 in spool file corruption.
1844 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1845 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1846 or write after TLS renegotiation, which otherwise led to messages
1849 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1850 as a tracking header (ie: a signed header comes before the signature).
1851 Patch from Wolfgang Breyha.
1853 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1854 comma-sep list; embedded commas doubled.
1856 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1858 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1860 Report and patch from Dmitry Banschikov.
1862 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1863 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1864 failures. We appear to now support TLS1.1+ with Exim.
1866 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1867 lets Exim select keys and certificates based upon TLS SNI from client.
1868 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1869 before an outbound SMTP session. New log_selector, +tls_sni.
1871 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1872 NULL dereference. Report and patch from Alun Jones.
1874 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1875 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1876 Not seeing resolver debug output on NetBSD, but suspect this is a
1877 resolver implementation change.
1879 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1880 Left warnings. Added "eximon gdb" invocation mode.
1882 PP/21 Defaulting "accept_8bitmime" to true, not false.
1884 PP/22 Added -bw for inetd wait mode support.
1886 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1887 locate the relevant includes and libraries. Made this the default.
1889 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1890 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1892 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1893 This may cause build issues on older platforms.
1895 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1896 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1897 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1898 Added SNI support via GnuTLS too.
1899 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1901 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1903 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1904 Applied second patch from Janne, implementing suggestion to default
1905 multiple-strings-in-record handling to match SPF spec.
1907 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1909 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1910 read-only, out of scope).
1911 Patch from Wolfgang Breyha, report from Stuart Northfield.
1913 PP/29 Fix three issues highlighted by clang analyser static analysis.
1914 Only crash-plausible issue would require the Cambridge-specific
1915 iplookup router and a misconfiguration.
1916 Report from Marcin Mirosław.
1918 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1920 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1921 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1922 As part of this, removing so much warning spew let me fix some minor
1923 real issues in debug logging.
1925 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1926 assignment on my part. Fixed.
1928 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1929 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1930 Janne Snabb (who went above and beyond: thank you).
1932 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1933 string otherwise requires a connection and a bunch more work and it's
1934 relatively easy to get wrong. Should also expose TLS library linkage
1937 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1938 64-bit ${eval} (JH/03).
1940 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1941 GNU libc to support some of the 64-bit stuff, should not lead to
1942 conflicts. Defined before os.h is pulled in, so if a given platform
1943 needs to override this, it can.
1945 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1946 protection layer was required, which is not implemented.
1947 Bugzilla 1254, patch from Wolfgang Breyha.
1949 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1950 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1951 tls_dhparam take prime identifiers. Also unbreak combination of
1952 OpenSSL+DH_params+TLSSNI.
1954 PP/39 Disable SSLv2 by default in OpenSSL support.
1960 PP/01 Solaris build fix for Oracle's LDAP libraries.
1961 Bugzilla 1109, patch from Stephen Usher.
1963 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1965 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1968 TF/02 Fix a couple more cases where we did not log the error message
1969 when unlink() failed. See also change 4.74-TF/03.
1971 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1972 lock up or crash if it happened to be inside a call to libc when it
1973 got a SIGUSR1 from exiwhat.
1975 The SIGUSR1 handler appends the current process status to the process
1976 log which is later printed by exiwhat. It used to use the general
1977 purpose logging code to do this, but several functions it calls are
1978 not safe for signals.
1980 The new output code in the SIGUSR1 handler is specific to the process
1981 log, and simple enough that it's easy to inspect for signal safety.
1982 Removing some special cases also simplifies the general logging code.
1983 Removing the spurious timestamps from the process log simplifies
1986 TF/04 Improved ratelimit ACL condition.
1988 The /noupdate option has been deprecated in favour of /readonly which
1989 has clearer semantics. The /leaky, /strict, and /readonly update modes
1990 are mutually exclusive. The update mode is no longer included in the
1991 database key; it just determines when the database is updated. (This
1992 means that when you upgrade Exim will forget old rate measurements.)
1994 Exim now checks that the per_* options are used with an update mode that
1995 makes sense for the current ACL. For example, when Exim is processing a
1996 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1997 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1998 must specify per_mail/readonly. If you omit the update mode it defaults to
1999 /leaky where that makes sense (as before) or /readonly where required.
2001 The /noupdate option is now undocumented but still supported for
2002 backwards compatibility. It is equivalent to /readonly except that in
2003 ACLs where /readonly is required you may specify /leaky/noupdate or
2004 /strict/noupdate which are treated the same as /readonly.
2006 A useful new feature is the /count= option. This is a generalization
2007 of the per_byte option, so that you can measure the throughput of other
2008 aggregate values. For example, the per_byte option is now equivalent
2009 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2011 The per_rcpt option has been generalized using the /count= mechanism
2012 (though it's more complicated than the per_byte equivalence). When it is
2013 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2014 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2015 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2016 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2017 Note that using per_rcpt with a non-readonly update mode in more than
2018 one ACL will cause the recipients to be double-counted. (The per_mail
2019 and per_byte options don't have this problem.)
2021 The handling of very low rates has changed slightly. If the computed rate
2022 is less than the event's count (usually one) then this event is the first
2023 after a long gap. In this case the rate is set to the same as this event's
2024 count, so that the first message of a spam run is counted properly.
2026 The major new feature is a mechanism for counting the rate of unique
2027 events. The new per_addr option counts the number of different
2028 recipients that someone has sent messages to in the last time period. It
2029 behaves like per_rcpt if all the recipient addresses are different, but
2030 duplicate recipient addresses do not increase the measured rate. Like
2031 the /count= option this is a general mechanism, so the per_addr option
2032 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2033 example, measure the rate that a client uses different sender addresses
2034 with the options per_mail/unique=$sender_address. There are further
2035 details in the main documentation.
2037 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2039 TF/06 Removed a few PCRE remnants.
2041 TF/07 Automatically extract Exim's version number from tags in the git
2042 repository when doing development or release builds.
2044 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2045 Bugzilla 879. Patch from Paul Fisher.
2047 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2048 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2051 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2053 PP/05 Variable $av_failed, true if the AV scanner deferred.
2054 Bugzilla 1078. Patch from John Horne.
2056 PP/06 Stop make process more reliably on build failure.
2057 Bugzilla 1087. Patch from Heiko Schlittermann.
2059 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2060 Bugzilla 1089. Patch from Heiko Schlittermann.
2062 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2063 Bugzilla 1131. Patch from Holger Weiß.
2065 PP/09 Handle IPv6 addresses with SPF.
2066 Bugzilla 860. Patch from Wolfgang Breyha.
2068 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2070 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2073 PP/11 match_* no longer expand right-hand-side by default.
2074 New compile-time build option, EXPAND_LISTMATCH_RHS.
2075 New expansion conditions, "inlist", "inlisti".
2077 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2079 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2081 PP/14 fix log_write() format string regression from TF/03.
2082 Bugzilla 1152. Patch from Dmitry Isaikin.
2088 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2090 PP/02 Harmonised TLS library version reporting; only show if debugging.
2091 Layout now matches that introduced for other libraries in 4.74 PP/03.
2093 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2095 PP/04 New "dns_use_edns0" global option.
2097 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2100 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2101 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2103 TK/01 Updated PolarSSL code to 0.14.2.
2104 Bugzilla 1097. Patch from Andreas Metzler.
2106 PP/07 Catch divide-by-zero in ${eval:...}.
2107 Fixes bugzilla 1102.
2109 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2112 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2113 format-string attack -- SECURITY: remote arbitrary code execution.
2115 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2116 time unintentionally subject to list matching rules, letting the header
2117 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2118 arbitrary string expansion). This allowed for information disclosure.
2120 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2121 INT_MIN/-1 -- value coerced to INT_MAX.
2127 NM/01 Workaround for PCRE version dependency in version reporting
2130 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2131 This fixes portability to compilers other than gcc, notably
2132 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2134 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2135 makefiles for portability to HP-UX and POSIX correctness.
2137 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2138 Also via indented variable definition in the Makefile.
2139 (Debugging by Oliver Heesakkers).
2141 PP/02 Restore caching of spamd results with expanded spamd_address.
2142 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2144 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2145 Improves build reliability. Fix from: Frank Elsner
2147 NM/02 Fix wide character breakage in the rfc2047 coding
2148 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2150 NM/03 Allow underscore in dnslist lookups
2151 Fixes bug 1026. Patch from Graeme Fowler
2153 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2154 Code patches from Adam Ciarcinski of NetBSD.
2156 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2159 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2160 is logged, to avoid truncation. Patch from John Horne.
2162 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2163 Patch from Jakob Hirsch.
2165 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2166 SQL string expansion failure details.
2167 Patch from Andrey Oktyabrski.
2169 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2170 Patch from Simon Arlott.
2172 PP/09 New lookups functionality failed to compile on old gcc which rejects
2173 extern declarations in function scope.
2174 Patch from Oliver Fleischmann
2176 PP/10 Use sig_atomic_t for flags set from signal handlers.
2177 Check getgroups() return and improve debugging.
2178 Fixed developed for diagnosis in bug 927 (which turned out to be
2181 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2182 Patch from Mark Zealey.
2184 PP/12 Bugzilla 1056: Improved spamd server selection.
2185 Patch from Mark Zealey.
2187 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2188 Based on patch from Heiko Schlittermann.
2190 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2191 Patch from Uwe Doering, sign-off by Michael Haardt.
2193 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2194 variable declaration deep within a block. Bug and patch from
2197 PP/15 lookups-Makefile IRIX compatibility coercion.
2199 PP/16 Make DISABLE_DKIM build knob functional.
2201 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2202 Patch by Simon Arlott
2204 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2205 variable argument macros. Our copy now differs from upstream.
2211 TF/01 Failure to get a lock on a hints database can have serious
2212 consequences so log it to the panic log.
2214 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2215 controlled using the smtp_confirmation log selector.
2217 TF/03 Include the error message when we fail to unlink a spool file.
2219 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2220 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2221 for maintaining out-of-tree patches for some time.
2223 PP/01 Bugzilla 139: Documentation and portability issues.
2224 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2225 Handle per-OS dynamic-module compilation flags.
2227 PP/02 Let /dev/null have normal permissions.
2228 The 4.73 fixes were a little too stringent and complained about the
2229 permissions on /dev/null. Exempt it from some checks.
2230 Reported by Andreas M. Kirchwitz.
2232 PP/03 Report version information for many libraries, including
2233 Exim version information for dynamically loaded libraries. Created
2234 version.h, now support a version extension string for distributors
2235 who patch heavily. Dynamic module ABI change.
2237 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2238 privilege escalation vulnerability whereby the Exim run-time user
2239 can cause root to append content of the attacker's choosing to
2242 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2245 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2246 If dropping privileges for untrusted macros, we disabled normal logging
2247 on the basis that it would fail; for the Exim run-time user, this is not
2248 the case, and it resulted in successful deliveries going unlogged.
2249 Fixed. Reported by Andreas Metzler.
2255 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2256 only prepend for the Resent-* case. Fixes regression introduced in
2257 Exim 4.70 by NM/22 for Bugzilla 607.
2259 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2260 increasing numbers of administrators be bitten by this.
2262 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2264 PP/03 Bugzilla 994: added openssl_options main configuration option.
2266 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2268 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2270 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2272 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2273 without a peer certificate, leading to a segfault because of an
2274 assumption that peers always have certificates. Be a little more
2275 paranoid. Problem reported by Martin Tscholak.
2277 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2278 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2279 NB: ClamAV planning to remove STREAM in "middle of 2010".
2280 CL also introduces -bmalware, various -d+acl logging additions and
2281 more caution in buffer sizes.
2283 PP/09 Implemented reverse_ip expansion operator.
2285 PP/10 Bugzilla 937: provide a "debug" ACL control.
2287 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2289 PP/12 Bugzilla 973: Implement --version.
2291 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2293 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2295 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2297 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2298 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2299 ignore trailing whitespace.
2301 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2303 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2306 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2307 Notification from Dr Andrew Aitchison.
2309 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2310 ExtendedDetectionInfo response format.
2311 Notification from John Horne.
2313 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2316 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2317 XSL and documented dependency on system catalogs, with examples of how
2320 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2323 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2324 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2325 configuration file which is writeable by the Exim user or group.
2327 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2328 of configuration files to cover files specified with the -C option if
2329 they are going to be used with root privileges, not just the default
2332 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2333 option (effectively making it always true).
2335 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2336 files to be used while preserving root privileges.
2338 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2339 that rogue child processes cannot use them.
2341 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2342 run-time user, instead of root.
2344 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2345 Exim run-time user without dropping privileges.
2347 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2348 result string, instead of calling string_vformat() twice with the same
2351 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2352 for other users. Others should always drop root privileges if they use
2353 -C on the command line, even for a whitelisted configure file.
2355 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2357 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2363 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2364 $data_path, and $header_path variables; fixed documentation bugs and
2367 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2368 exipick to access non-standard spools, including the "frozen" queue
2371 NM/01 Bugzilla 965: Support mysql stored procedures.
2372 Patch from Alain Williams
2374 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2376 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2377 Patch from Andreas Metzler
2379 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2380 Patch from Kirill Miazine
2382 NM/05 Bugzilla 671: Added umask to procmail example.
2384 JJ/03 installed exipick 20100323.0, fixing doc bug
2386 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2387 directory. Notification and patch from Dan Rosenberg.
2389 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2391 TK/02 Improve log output when DKIM signing operation fails.
2393 MH/01 Treat the transport option dkim_domain as a colon separated
2394 list, not as a single string, and sign the message with each element,
2395 omitting multiple occurences of the same signer.
2397 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2398 Bugzilla 985, 986. Patch by Simon Arlott
2400 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2401 Patch by Simon Arlott
2403 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2404 MBX locking. Notification from Dan Rosenberg.
2410 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2412 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2414 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2416 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2418 NM/04 Bugzilla 915: Flag broken perl installation during build.
2424 TK/01 Added patch by Johannes Berg that expands the main option
2425 "spamd_address" if it starts with a dollar sign.
2427 TK/02 Write list of recipients to X-Envelope-Sender header when building
2428 the mbox-format spool file for content scanning (suggested by Jakob
2431 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2432 (http://www.dcc-servers.net/) support via dccifd. Activated by
2433 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2435 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2436 by Mark Daniel Reidel <mr@df.eu>.
2438 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2439 When building exim an external PCRE library is now needed -
2440 PCRE is a system library on the majority of modern systems.
2441 See entry on PCRE_LIBS in EDITME file.
2443 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2444 conversation. Added nologin parameter to request.
2445 Patch contributed by Kirill Miazine.
2447 TF/01 Do not log submission mode rewrites if they do not change the address.
2449 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2451 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2452 log files in place. Contributed by Roberto Lima.
2454 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2456 TF/03 Bugzilla 615: When checking the local_parts router precondition
2457 after a local_part_suffix or local_part_prefix option, Exim now
2458 does not use the address's named list lookup cache, since this
2459 contains cached lookups for the whole local part.
2461 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2462 Robert Millan. Documentation is in experimental-spec.txt.
2464 TF/04 Bugzilla 668: Fix parallel build (make -j).
2466 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2468 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2469 Patch provided by Jan Srzednicki.
2471 TF/05 Leading white space used to be stripped from $spam_report which
2472 wrecked the formatting. Now it is preserved.
2474 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2475 that they are available at delivery time.
2477 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2479 TF/08 TLS error reporting now respects the incoming_interface and
2480 incoming_port log selectors.
2482 TF/09 Produce a more useful error message if an SMTP transport's hosts
2483 setting expands to an empty string.
2485 NM/06 Bugzilla 744: EXPN did not work under TLS.
2486 Patch provided by Phil Pennock.
2488 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2489 Patch provided by Richard Godbee.
2491 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2492 acl_smtp_notquit, added index entry.
2494 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2495 Patch provided by Eugene Bujak.
2497 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2498 accept(). Patch provided by Maxim Dounin.
2500 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2501 Patch provided by Phil Pennock.
2503 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2505 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2506 Patch provided by Brad "anomie" Jorsch.
2508 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2509 Patch provided by Dean Brooks.
2511 TK/05 Add native DKIM support (does not depend on external libraries).
2513 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2514 Patch provided by Graeme Fowler.
2516 NM/16 Bugzilla 851: Documentation example syntax fix.
2518 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2520 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2523 NM/19 Bugzilla 745: TLS version reporting.
2524 Patch provided by Phil Pennock.
2526 NM/20 Bugzilla 167: bool: condition support.
2527 Patch provided by Phil Pennock.
2529 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2530 clients. Patch provided by Phil Pennock.
2532 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2533 Patch provided by Brad "anomie" Jorsch.
2535 NM/23 Bugzilla 687: Fix misparses in eximstats.
2536 Patch provided by Heiko Schlittermann.
2538 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2539 Patch provided by Heiko Schlittermann.
2541 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2542 plus update to original patch.
2544 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2546 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2547 Patch provided by David Brownlee.
2549 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2551 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2553 NM/30 Bugzilla 888: TLS documentation bugfixes.
2555 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2557 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2558 Unlike the original bugzilla I have changed all shell scripts in src tree.
2560 NM/33 Bugzilla 898: Transport filter timeout fix.
2561 Patch by Todd Rinaldo.
2563 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2564 Patch by Serge Demonchaux.
2566 NM/35 Bugzilla 39: Base64 decode bug fixes.
2567 Patch by Jakob Hirsch.
2569 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2571 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2573 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2575 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2581 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2582 ALT-N's libdkim that I have put here:
2583 http://duncanthrax.net/exim-experimental/
2585 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2586 were called 'true' and it seems that C99 defines that as a reserved
2587 keyword to be used with 'bool' variable types. That means you could
2588 not include C99-style headers which use bools without triggering
2589 build errors in sieve.c.
2591 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2592 as mailq or other aliases. Changed the --help handling significantly
2593 to do whats expected. exim_usage() emits usage/help information.
2595 SC/01 Added the -bylocaldomain option to eximstats.
2597 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2599 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2601 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2607 PH/01 Another patch from the Sieve maintainer.
2609 PH/02 When an IPv6 address is converted to a string for single-key lookup
2610 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2611 dots are used instead of colons so that keys in lsearch files need not
2612 contain colons. This was done some time before quoting was made available
2613 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2614 (notated using the quote facility) so as to distinguish them from IPv4
2615 keys. This meant that lookups for IP addresses in host lists did not work
2616 for iplsearch lookups.
2618 This has been fixed by arranging for IPv6 addresses to be expressed with
2619 colons if the lookup type is iplsearch. This is not incompatible, because
2620 previously such lookups could never work.
2622 The situation is now rather anomalous, since one *can* have colons in
2623 ordinary lsearch keys. However, making the change in all cases is
2624 incompatible and would probably break a number of configurations.
2626 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2629 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2630 conversion specification without a maximum field width, thereby enabling
2631 a rogue spamd server to cause a buffer overflow. While nobody in their
2632 right mind would setup Exim to query an untrusted spamd server, an
2633 attacker that gains access to a server running spamd could potentially
2634 exploit this vulnerability to run arbitrary code as the Exim user.
2636 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2637 $primary_hostname instead of what libspf2 thinks the hosts name is.
2639 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2640 a directory entry by the name of the lookup key. Previously, if a
2641 symlink pointed to a non-existing file or a file in a directory that
2642 Exim lacked permissions to read, a lookup for a key matching that
2643 symlink would fail. Now it is enough that a matching directory entry
2644 exists, symlink or not. (Bugzilla 503.)
2646 PH/03 The body_linecount and body_zerocount variables are now exported in the
2649 PH/04 Added the $dnslist_matched variable.
2651 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2652 This means they are set thereafter only if the connection becomes
2655 PH/06 Added the client_condition to authenticators so that some can be skipped
2656 by clients under certain conditions.
2658 PH/07 The error message for a badly-placed control=no_multiline_responses left
2659 "_responses" off the end of the name.
2661 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2663 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2664 (without spaces) instead of just copying the configuration text.
2666 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2668 PH/11 Added $max_received_linelength.
2670 PH/12 Added +ignore_defer and +include_defer to host lists.
2672 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2673 way in which PCRE > 7.0 is built.
2675 PH/14 Implemented queue_only_load_latch.
2677 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2678 MAIL command. The effect was to mangle the value on 64-bit systems.
2680 PH/16 Another patch from the Sieve maintainer.
2682 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2684 PH/18 If a system quota error occurred while trying to create the file for
2685 a maildir delivery, the message "Mailbox is full" was not appended to the
2686 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2687 only to a quota excession during the actual writing of the file.
2689 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2690 characters?) which causes problems in log lines. The DN values are now
2691 passed through string_printing() before being added to log lines.
2693 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2694 and InterBase are left for another time.)
2696 PH/21 Added message_body_newlines option.
2698 PH/22 Guard against possible overflow in moan_check_errorcopy().
2700 PH/23 POSIX allows open() to be a macro; guard against that.
2702 PH/24 If the recipient of an error message contained an @ in the local part
2703 (suitably quoted, of course), incorrect values were put in $domain and
2704 $local_part during the evaluation of errors_copy.
2710 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2711 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2714 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2715 issue a MAIL command.
2717 PH/02 In an ACL statement such as
2719 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2721 if a client was not listed at all, or was listed with a value other than
2722 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2723 the condition was not true (as it should be), so access was not denied.
2724 The bug was that the ! inversion was incorrectly passed on to the second
2725 item. This has been fixed.
2727 PH/03 Added additional dnslists conditions == and =& which are different from
2728 = and & when the dns lookup returns more than one IP address.
2730 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2731 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2733 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2734 FSYNC, which compiles an option called disable_fsync that allows for
2735 bypassing fsync(). The documentation is heavily laced with warnings.
2737 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2739 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2740 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2741 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2742 including adding "make clean"; (3) Added -fPIC when compiling the test
2743 dynamically loaded module, to get rid of a warning.
2745 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2746 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2747 = 0s. The bug is otherwise harmless.
2749 PH/07 There was a bug in the dovecot authenticator such that the value of
2750 $auth1 could be overwritten, and so not correctly preserved, after a
2751 successful authentication. This usually meant that the value preserved by
2752 the server_setid option was incorrect.
2754 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2756 PH/09 Installed PCRE release 7.0.
2758 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2759 run for batched SMTP input. It is now run at the start of every message
2760 in the batch. While fixing this I discovered that the process information
2761 (output by running exiwhat) was not always getting set for -bs and -bS
2762 input. This is fixed, and it now also says "batched" for BSMTP.
2764 PH/11 Added control=no_pipelining.
2766 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2767 patch, slightly modified), and move the expansion of helo_data till after
2768 the connection is made in the smtp transport (so it can use these
2771 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2773 PH/14 Added log_selector = +pid.
2775 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2777 PH/16 Add ${if forany and ${if forall.
2779 PH/17 Added dsn_from option to vary the From: line in DSNs.
2781 PH/18 Flush SMTP output before performing a callout, unless control =
2782 no_callout_flush is set.
2784 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2785 was true (the default) a successful delivery failed to delete the retry
2786 item, thus causing premature timeout of the address. The bug is now
2789 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2791 PH/21 Long custom messages for fakedefer and fakereject are now split up
2792 into multiline responses in the same way that messages for "deny" and
2793 other ACL rejections are.
2795 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2796 with slight modification.
2798 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2799 draft, changing the syntax and factoring some duplicate code".
2801 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2802 for deliveries of the second and subsequent messages over the same SMTP
2805 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2806 ${reduce, with only minor "tidies".
2808 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2810 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2811 expansion side effects.
2813 PH/27 When a message times out after an over-quota error from an Exim-imposed
2814 quota, the bounce message says "mailbox is full". This message was not
2815 being given when it was a system quota that was exceeded. It now should
2818 MH/03 Made $recipients available in local_scan(). local_scan() already has
2819 better access to the recipient list through recipients_list[], but
2820 $recipients can be useful in postmaster-provided expansion strings.
2822 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2823 in the case of a MAIL command with additional options following the
2824 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2825 were accidentally chopped off.
2827 PH/29 SMTP synchronization checks are implemented when a command is read -
2828 there is a check that no more input is waiting when there shouldn't be
2829 any. However, for some commands, a delay in an ACL can mean that it is
2830 some time before the response is written. In this time, more input might
2831 arrive, invalidly. So now there are extra checks after an ACL has run for
2832 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2833 pipelining has not been advertised.
2835 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2837 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2838 returned in the SMTP response when smtp_return_error_details was false.
2839 This has been fixed.
2841 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2842 instead of the C I/O that was originally supplied, because problems were
2843 reported on Solaris.
2845 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2846 Exim which did not show up earlier: it was assuming that a call to
2847 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2848 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2849 was a macro that became an assignment, so it seemed to work. This has
2850 changed to a proper function call with a void return, hence the compile
2851 error. Exim's code has been fixed.
2853 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2856 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2858 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2860 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2861 because it turns out to be too big or there is a timeout) there is no
2862 "Completed" line in the log. When some messages of this type were
2863 selected by exigrep, they were listed as "not completed". Others were
2864 picked up by some special patterns. I have improved the selection
2865 criteria to be more general.
2867 PH/38 The host_find_failed option in the manualroute router can now be set
2868 to "ignore", to completely ignore a host whose IP address cannot be
2869 found. If all hosts are ignored, the behaviour is controlled by the new
2870 host_all_ignored option.
2872 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2873 homing or because of multiple MX records with /mx) generated more than
2874 one IP address, and the following item turned out to be the local host,
2875 all the secondary addresses of the first item were incorrectly removed
2876 from the list, along with the local host and any following hosts (which
2877 is what is supposed to happen).
2879 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2880 whoever called Exim into the -H file. In the case of the daemon it was
2881 behaving confusingly. When first started, it used values for whoever
2882 started the daemon, but after a SIGHUP it used the Exim user (because it
2883 calls itself on a restart). I have changed the code so that it now always
2886 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2887 message are rejected with the same error (e.g. no authentication or bad
2888 sender address), and a DATA command is nevertheless sent (as can happen
2889 with PIPELINING or a stupid MUA), the error message that was given to the
2890 RCPT commands is included in the rejection of the DATA command. This is
2891 intended to be helpful for MUAs that show only the final error to their
2894 PH/42 Another patch from the Sieve maintainer.
2896 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2897 Eximstats - Fixed some broken HTML links and added missing column headers
2899 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2900 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2902 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2904 PH/43 Yet another patch from the Sieve maintainer.
2906 PH/44 I found a way to check for a TCP/IP connection going away before sending
2907 the response to the final '.' that terminates a message, but only in the
2908 case where the client has not sent further data following the '.'
2909 (unfortunately, this is allowed). However, in many cases there won't be
2910 any further data because there won't be any more messages to send. A call
2911 to select() can be used: if it shows that the input is "ready", there is
2912 either input waiting, or the socket has been closed. An attempt to read
2913 the next input character can distinguish the two cases. Previously, Exim
2914 would have sent an OK response which the client would never have see.
2915 This could lead to message repetition. This fix should cure that, at
2916 least in a lot of common cases.
2918 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2919 advertised in response to EHLO.
2925 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2926 fixed by 4.65/MH/01 (is this a record?) are fixed:
2928 (i) An empty string was always treated as zero by the numeric comparison
2929 operators. This behaviour has been restored.
2931 (ii) It is documented that the numeric comparison operators always treat
2932 their arguments as decimal numbers. This was broken in that numbers
2933 starting with 0 were being interpreted as octal.
2935 While fixing these problems I realized that there was another issue that
2936 hadn't been noticed. Values of message_size_limit (both the global option
2937 and the transport option) were treated as octal if they started with 0.
2938 The documentation was vague. These values are now always treated as
2939 decimal, and I will make that clear in the documentation.
2945 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2946 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2949 MH/01 Don't check that the operands of numeric comparison operators are
2950 integers when their expansion is in "skipping" mode (fixes bug
2951 introduced by 4.64-PH/07).
2953 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2954 child addresses, Exim now panics and dies. Previously, because the count
2955 is held in a short int, deliveries were likely to be lost. As such a
2956 large number of recipients for a single message is ridiculous
2957 (performance will be very, very poor), I have chosen to impose a limit
2958 rather than extend the field.
2964 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2965 leftover -K file (the existence of which was triggered by #402).
2966 While we were at it, introduced process PID as part of the -K
2967 filename. This should rule out race conditions when creating
2970 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2971 processing considerably. Previous code took too long for large mails,
2972 triggering a timeout which in turn triggers #401.
2974 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2975 in the DK code in transports.c. sendfile() is not really portable,
2976 hence the _LINUX specificness.
2978 TF/01 In the add_headers option to the mail command in an Exim filter,
2979 there was a bug that Exim would claim a syntax error in any
2980 header after the first one which had an odd number of characters
2983 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2984 callout verification, Exim cached a "reject" for the entire domain. This
2985 is correct for most verifications, but it is not correct for a recipient
2986 verification with use_sender or use_postmaster set, because in that case
2987 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2988 case of MAIL FROM:<> rejection from other early rejections (e.g.
2989 rejection of HELO). When verifying a recipient using a non-null MAIL
2990 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2991 Whatever the result of the callout, the value of the domain cache is
2992 left unchanged (for any other kind of callout, getting as far as trying
2993 RCPT means that the domain itself is ok).
2995 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2998 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2999 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3000 session, the daemon ignores ECONNECT errors and logs others; it now
3001 ignores EPIPE as well.
3003 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3004 (quoted-printable decoding).
3006 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3007 later the small subsequent patch to fix an introduced bug.
3009 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3011 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3013 PH/08 An error is now given if message_size_limit is specified negative.
3015 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3016 to be given (somewhat) arbitrary names.
3018 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3021 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3022 miscellaneous code fixes
3024 PH/10 Added the log_reject_target ACL modifier to specify where to log
3027 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3028 hostname. This is wrong, because it relates to the incoming message (and
3029 probably the interface on which it is arriving) and not to the outgoing
3030 callout (which could be using a different interface). This has been
3031 changed to use the value of the helo_data option from the smtp transport
3032 instead - this is what is used when a message is actually being sent. If
3033 there is no remote transport (possible with a router that sets up host
3034 addresses), $smtp_active_hostname is used.
3036 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3037 tweaks were necessary in order to get it to work (see also 21 below):
3038 (a) The code assumed that strncpy() returns a negative number on buffer
3039 overflow, which isn't the case. Replaced with Exim's string_format()
3041 (b) There were several signed/unsigned issues. I just did the minimum
3042 hacking in of casts. There is scope for a larger refactoring.
3043 (c) The code used strcasecmp() which is not a standard C function.
3044 Replaced with Exim's strcmpic() function.
3045 (d) The code set only $1; it now sets $auth1 as well.
3046 (e) A simple test gave the error "authentication client didn't specify
3047 service in request". It would seem that Dovecot has changed its
3048 interface. Fortunately there's a specification; I followed it and
3049 changed what the client sends and it appears to be working now.
3051 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3054 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3055 address A is aliased to B and C, where B exists and C does not. Without
3056 -v the output is "A verified" because verification stops after a
3057 successful redirection if more than one address is generated. However,
3058 with -v the child addresses are also verified. Exim was outputting "A
3059 failed to verify" and then showing the successful verification for C,
3060 with its parentage. It now outputs "B failed to verify", showing B's
3061 parentage before showing the successful verification of C.
3063 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3064 look up a TXT record in a specific list after matching in a combined
3067 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3068 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3069 they consult the DNS. I had assumed they would set it the way they
3070 wanted; and indeed my experiments on Linux seem to show that in some
3071 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3072 To be on the safe side, however, I have now made the interface to
3073 host_find_byname() similar to host_find_bydns(), with an argument
3074 containing the DNS resolver options. The host_find_byname() function now
3075 sets these options at its start, just as host_find_bydns() does. The smtp
3076 transport options dns_qualify_single and dns_search_parents are passed to
3077 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3078 of host_find_byname() use the default settings of RES_DEFNAMES
3079 (qualify_single) but not RES_DNSRCH (search_parents).
3081 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3082 spool_read_header() do less string testing, by means of a preliminary
3083 switch on the second character of optional "-foo" lines. (This is
3084 overdue, caused by the large number of possibilities that now exist.
3085 Originally there were few.) While I was there, I also converted the
3086 str(n)cmp tests so they don't re-test the leading "-" and the first
3087 character, in the hope this might squeeze out yet more improvement.
3089 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3090 flag allowing group syntax was set by the header_syntax check but not
3091 turned off, possible causing trouble later; (2) The flag was not being
3092 set at all for the header_verify test, causing "group"-style headers to
3093 be rejected. I have now set it in this case, and also caused header_
3094 verify to ignore an empty address taken from a group. While doing this, I
3095 came across some other cases where the code for allowing group syntax
3096 while scanning a header line wasn't quite right (mostly, not resetting
3097 the flag correctly in the right place). These bugs could have caused
3098 trouble for malformed header lines. I hope it is now all correct.
3100 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3101 with the "reply" argument non-NULL. The code, however (which originally
3102 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3103 but it didn't always do it. This confused somebody who was copying the
3104 code for some other use. I have removed all the tests.
3106 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3107 feature that was used to support insecure browsers during the U.S. crypto
3108 embargo. It requires special client support, and Exim is probably the
3109 only MTA that supported it -- and would never use it because real RSA is
3110 always available. This code has been removed, because it had the bad
3111 effect of slowing Exim down by computing (never used) parameters for the
3112 RSA_EXPORT functionality.
3114 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3115 authenticator to fail if there's a tab character in the incoming data
3116 (there should never be unless someone is messing about, as it's supposed
3117 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3118 if the connection is using TLS or if the remote IP is the same as the
3119 local IP, and the "valid-client-cert option" if a client certificate has
3122 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3123 authenticators. This can be used for authorization after authentication
3124 succeeds. (In the case of plaintext, it servers for both authentication
3127 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3128 if any retry times were supplied.
3130 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3131 connection, where there is no client IP address to check. In this
3132 situation, the verify now always succeeds.
3134 PH/25 Applied John Jetmore's -Mset patch.
3136 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3138 PH/27 In a string expansion for a processed (not raw) header when multiple
3139 headers of the same name were present, leading whitespace was being
3140 removed from all of them, but trailing whitespace was being removed only
3141 from the last one. Now trailing whitespace is removed from each header
3142 before concatenation. Completely empty headers in a concatenation (as
3143 before) are ignored.
3145 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3146 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3148 PH/29 [Removed. This was a change that I later backed out, and forgot to
3149 correct the ChangeLog entry (that I had efficiently created) before
3150 committing the later change.]
3152 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3153 address errors (4xx response to RCPT) over the same connection as other
3154 messages routed to the same hosts. Such deliveries are always "forced",
3155 so retry times are not inspected. This resulted in far too many retries
3156 for the affected addresses. The effect occurred only when there were more
3157 hosts than the hosts_max_try setting in the smtp transport when it had
3158 the 4xx errors. Those hosts that it had tried were not added to the list
3159 of hosts for which the message was waiting, so if all were tried, there
3160 was no problem. Two fixes have been applied:
3162 (i) If there are any address or message errors in an SMTP delivery, none
3163 of the hosts (tried or untried) are now added to the list of hosts
3164 for which the message is waiting, so the message should not be a
3165 candidate for sending over the same connection that was used for a
3166 successful delivery of some other message. This seems entirely
3167 reasonable: after all the message is NOT "waiting for some host".
3168 This is so "obvious" that I'm not sure why it wasn't done
3169 previously. Hope I haven't missed anything, but it can't do any
3170 harm, as the worst effect is to miss an optimization.
3172 (ii) If, despite (i), such a delivery is accidentally attempted, the
3173 routing retry time is respected, so at least it doesn't keep
3174 hammering the server.
3176 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3177 in ${readsocket because some servers need this prod.
3179 PH/32 Added some extra debug output when updating a wait-xxx database.
3181 PH/33 The hint "could be header name not terminated by colon", which has been
3182 given for certain expansion errors for a long time, was not being given
3183 for the ${if def:h_colon_omitted{... case.
3185 PH/34 The spec says: "With one important exception, whenever a domain list is
3186 being scanned, $domain contains the subject domain." There was at least
3187 one case where this was not true.
3189 PH/35 The error "getsockname() failed: connection reset by peer" was being
3190 written to the panic log as well as the main log, but it isn't really
3191 panic-worthy as it just means the connection died rather early on. I have
3192 removed the panic log writing for the ECONNRESET error when getsockname()
3195 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3196 runs only) independently of the message's sender address. This meant
3197 that, if the 4xx error was in fact related to the sender, a different
3198 message to the same recipient with a different sender could confuse
3199 things. In particular, this can happen when sending to a greylisting
3200 server, but other circumstances could also provoke similar problems.
3201 I have changed the default so that the retry time for these errors is now
3202 based a combination of the sender and recipient addresses. This change
3203 can be overridden by setting address_retry_include_sender=false in the
3206 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3207 remote server are returned as part of bounce messages. This was not
3208 happening for LMTP over a pipe (the lmtp transport), but now it is the
3209 same for both kinds of LMTP.
3211 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3212 in header lines that were in fact CNAMEs. This is no longer the case.
3214 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3215 and queue runs started by the daemon processed all messages. This has
3216 been fixed so that -R and -S can now usefully be given with -q<time>.
3218 PH/40 Import PCRE release 6.7 (fixes some bugs).
3220 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3222 PH/42 Give an error if -q is specified more than once.
3224 PH/43 Renamed the variables $interface_address and $interface_port as
3225 $received_ip_address and $received_port, to make it clear that these
3226 values apply to message reception, and not to the outgoing interface when
3227 a message is delivered. (The old names remain recognized, of course.)
3229 PH/44 There was no timeout on the connect() call when using a Unix domain
3230 socket in the ${readsocket expansion. There now is.
3232 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3233 be meaningful with "accept".
3235 SC/01 Eximstats V1.43
3236 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3238 SC/02 Eximstats V1.44
3239 Use a glob alias rather than an array ref in the generated
3240 parser. This improves both readability and performance.
3242 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3243 Collect SpamAssassin and rejection statistics.
3244 Don't display local sender or destination tables unless
3245 there is data to show.
3246 Added average volumes into the top table text output.
3248 SC/04 Eximstats V1.46
3249 Collect data on the number of addresses (recipients)
3250 as well as the number of messages.
3252 SC/05 Eximstats V1.47
3253 Added 'Message too big' to the list of mail rejection
3254 reasons (thanks to Marco Gaiarin).
3256 SC/06 Eximstats V1.48
3257 Mainlog lines which have GMT offsets and are too short to
3258 have a flag are now skipped.
3260 SC/07 Eximstats V1.49 (Alain Williams)
3261 Added the -emptyok flag.
3263 SC/08 Eximstats V1.50
3264 Fixes for obtaining the IP address from reject messages.
3266 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3267 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3268 whitespace changes from 4.64-PH/27
3270 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3273 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3274 are found, allow negative numbers in numeric criteria)
3276 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3278 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3279 to match changes made in 4.64-PH/43
3281 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3283 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3284 "domain" is actually an IP address, and force a failure. This locks out
3285 those revolvers/nameservers that support "A-for-A" lookups, in
3286 contravention of the specifications.
3288 PH/48 When a host name was looked up from an IP address, and the subsequent
3289 forward lookup of the name timed out, the host name was left in
3290 $sender_host_name, contrary to the specification.
3292 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3293 restricted to single-key lookups, Exim was not diagnosing an error if
3294 * or *@ was used with a query-style lookup.
3296 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3298 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3299 long ago, but noone interested enough thought of it. Let's just say that
3300 the "1.1" means that there are some new functions that weren't there at
3301 some point in the past.
3303 PH/51 Error processing for expansion failure of helo_data from an smtp
3304 transport during callout processing was broken.
3306 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3307 tested/used via the -bh/-bhc/-bs options.
3309 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3310 bug, fixed in subsequent PCRE releases).
3312 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3313 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3315 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3321 SC/01 Use a glob alias rather than an array ref in eximstats generated
3322 parser. This improves both readability and performance.
3324 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3325 Don't display local sender or destination tables in eximstats unless
3326 there is data to show.
3327 Added average volumes into the eximstats top table text output.
3329 SC/03 Collect data on the number of addresses (recipients) as well
3330 as the number of messages in eximstats.
3332 TF/01 Correct an error in the documentation for the redirect router. Exim
3333 does (usually) call initgroups() when daemonizing.
3335 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3336 with consistent privilege compared to when running as a daemon.
3338 TF/03 Note in the spec that $authenticated_id is not set for local
3339 submissions from trusted users.
3341 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3342 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3344 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3345 by adding some example configuration directives to the default
3346 configuration file. A little bit of work is required to uncomment the
3347 directives and define how usernames and passwords are checked, but
3348 there is now a framework to start from.
3350 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3351 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3352 without this. I don't know how relevant this is to other LDAP libraries.
3354 PH/02 Add the verb name to the "unknown ACL verb" error.
3356 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3358 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3360 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3361 directory not expanded when it should be if an expanded home directory
3362 was set for the address (which is overridden by the transport).
3364 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3367 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3368 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3369 because it is too late at that time, and has no effect.
3371 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3372 security issue with \' (bugzilla #107). I could not use the
3373 PQescapeStringConn() function, because it needs a PGconn value as one of
3376 PH/08 When testing addresses using -bt, indicate those final addresses that
3377 are duplicates that would not cause an additional delivery. At least one
3378 person was confused, thinking that -bt output corresponded to deliveries.
3379 (Suppressing duplicates isn't a good idea as you lose the information
3380 about possibly different redirections that led to the duplicates.)
3382 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3383 systems where poll() doesn't work, in particular OS X.
3385 PH/10 Added more information to debugging output for retry time not reached.
3387 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3388 operations in malware.c.
3390 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3393 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3394 syslog_duplication set false, log lines that would normally be written
3395 both the the main log and to the reject log were not written to syslog at
3398 PH/14 In the default configuration, change the use of "message" in ACL warn
3399 statements to "add_header".
3401 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3402 not followed by a command (e.g. "seen endif").
3404 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3405 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3408 PH/17 Added extra conditions to the default value of delay_warning_condition
3412 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3413 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3414 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3417 The Auto-Submitted: and various List- headers are standardised, whereas I
3418 don't think Precedence: ever was.
3420 PH/18 Refactored debugging code in route_finduser() to show more information,
3421 in particular, the error code if getpwnam() issues one.
3423 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3424 This is apparently needed in addition to the PH/07 change above to avoid
3425 any possible encoding problems.
3427 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3428 but not after initializing Perl.
3430 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3431 output them only if debugging. By default they are written stderr,
3432 apparently, which is not desirable.
3434 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3437 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3440 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3442 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3443 authenticated or an ident call has been made. Suppress the default
3444 values for $authenticated_id and $authenticated_sender (but permit -oMai
3445 and -oMas) when testing with -bh.
3447 PH/24 Re-jigged the order of the tests in the default configuration so that the
3448 tests for valid domains and recipients precede the DNS black list and CSA
3449 tests, on the grounds that those ones are more expensive.
3451 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3452 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3453 This bug exists in every version of Exim that I still have, right back to
3456 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3457 However, an attempt to turn on case-sensitivity in a regex key by
3458 including (?-i) didn't work because the subject string was already
3459 lowercased, and the effects were non-intuitive. It turns out that a
3460 one-line patch can be used to allow (?-i) to work as expected.
3466 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3467 other effects) broke the use of negated acl sub-conditions.
3469 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3472 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3473 "Deny" causes Exim to reject the incoming connection with a 554 error.
3474 Unfortunately, if there is a major crisis, such as a disk failure,
3475 tcp-wrappers gives "deny", whereas what one would like would be some
3476 kind of temporary error. A kludge has been added to help with this.
3477 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3478 554 error is used if errno is still zero or contains ENOENT (which occurs
3479 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3482 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3484 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3485 errors. Otherwise a message that provokes a temporary error (when other
3486 messages do not) can cause a whole host to time out.
3488 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3489 addresses were routed directly to files or pipes from a redirect router.
3490 File deliveries just didn't batch; pipe deliveries might have suffered
3493 PH/06 A failure to get a lock for a hints database would erroneously always say
3494 "Failed to get write lock", even when it was really a read lock.
3496 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3497 of 0600. This has been changed to use the value of the lockfile_mode
3498 option (which defaults to 0600).
3500 PH/08 Applied small patch from the Sieve maintainer.
3502 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3503 folder from quota calculations, a direct delivery into this folder messed
3504 up the contents of the maildirsize file. This was because the regex was
3505 used only to exclude .Trash (or whatever) when the size of the mailbox
3506 was calculated. There was no check that a delivery was happening into an
3507 excluded directory. This bug has been fixed by ignoring all quota
3508 processing for deliveries into excluded directories.
3510 PH/10 Added the maildirfolder_create_regex option to appendfile.
3516 PH/01 The code for finding all the local interface addresses on a FreeBSD
3517 system running IPv6 was broken. This may well have applied to all BSD
3518 systems, as well as to others that have similar system calls. The broken
3519 code found IPv4 interfaces correctly, but gave incorrect values for the
3520 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3521 that it would not match correctly against @[] and not recognize the IPv6
3524 PH/02 The ipliteral router was not recognizing addresses of the form user@
3525 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3527 PH/03 Added disable_ipv6.
3529 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3530 decoded form, because it is most often used to construct To: headers
3531 lines in autoreplies, and the decoded form may well be syntactically
3532 invalid. However, $reply_address has leading white space removed, and all
3533 newlines turned into spaces so that the autoreply transport does not
3536 PH/05 If group was specified without a user on a router, and no group or user
3537 was specified on a transport, the group from the router was ignored.
3539 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3540 for visible compile-time settings that can be used to change these
3541 numbers, for those that want even more. Backwards compatibility with old
3542 spool files has been maintained. However, going back to a previous Exim
3543 release will lost any variables that are in spool files.
3545 PH/07 Two small changes when running in the test harness: increase delay when
3546 passing a TCP/IP connection to a new process, in case the original
3547 process has to generate a bounce, and remove special handling of
3548 127.0.0.2 (sic), which is no longer necessary.
3550 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3551 be the same on different OS.
3553 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3556 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3557 whether --show-vars was specified or not
3559 JJ/02 exipick: Added support for new ACL variable spool format introduced
3562 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3563 syntactically invalid From: or Reply-to: line, and a filter used this to
3564 generate an autoreply, and therefore failed to obtain an address for the
3565 autoreply, Exim could try to deliver to a non-existent relative file
3566 name, causing unrelated and misleading errors. What now happens is that
3567 it logs this as a hard delivery error, but does not attempt to create a
3570 PH/11 The exinext utility has a -C option for testing purposes, but although
3571 the given file was scanned by exinext itself; it wasn't being passed on
3572 when Exim was called.
3574 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3575 an end-of-file indication when reading a command response.
3577 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3578 compiled. In many other places in Exim, IPv6 addresses are always
3579 recognized, so I have changed this. It also means that IPv4 domain
3580 literals of the form [IPV4:n.n.n.n] are now always recognized.
3582 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3583 used if the router is not running as root, for example, when verifying at
3584 ACL time, or when using -bh. The debugging output from this situation was
3585 non-existent - all you got was a failure to exec. I have made two
3588 (a) Failures to set uid/gid, the current directory, or a process leader
3589 in a subprocess such as that created by queryprogram now generate
3590 suitable debugging output when -d is set.
3592 (b) The queryprogram router detects when it is not running as root,
3593 outputs suitable debugging information if -d is set, and then runs
3594 the subprocess without attempting to change uid/gid.
3596 PH/15 Minor change to Makefile for building test_host (undocumented testing
3599 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3600 additional section of a DNS packet that returns MX or SRV records.
3601 Instead, it always explicitly searches for A/AAAA records. This avoids
3602 major problems that occur when a DNS server includes only records of one
3603 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3604 fixed another bug: if SRV records were looked up and the corresponding
3605 address records were *not* found in the additional section, the port
3606 values from the SRV records were lost.
3608 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3609 using the correct key (the original address) when searching the retry
3610 rules in order to find which one to use for generating the retry hint.
3612 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3613 adding the default one. Similarly, if it contains a Reply-To: header, the
3614 errors_reply_to option, if set, is not used.
3616 PH/19 When calculating a retry time, Exim used to measure the "time since
3617 failure" by looking at the "first failed" field in the retry record. Now
3618 it does not use this if it is later than than the arrival time of the
3619 message. Instead it uses the arrival time. This makes for better
3620 behaviour in cases where some deliveries succeed, thus re-setting the
3621 "first failed" field. An example is a quota failure for a huge message
3622 when small messages continue to be delivered. Without this change, the
3623 "time since failure" will always be short, possible causing more frequent
3624 delivery attempts for the huge message than are intended.
3625 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3627 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3628 $1, $2, $3) because the numerical variables can be reset during some
3629 expansion items (e.g. "match"), thereby losing the authentication data.
3631 PH/21 Make -bV show the size of off_t variables so that the test suite can
3632 decide whether to run tests for quotas > 2G.
3634 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3635 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3636 filecount value is greater than 2G or if a quota value is greater than 2G
3637 on a system where the size of off_t is not greater than 4, a panic error
3640 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3641 never match. The debug and -bh output now contains an explicit error
3642 message indicating a malformed IPv4 address or mask.
3644 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3645 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3646 PH/23 above applies.
3648 PH/25 Do not write to syslog when running in the test harness. The only
3649 occasion when this arises is a failure to open the main or panic logs
3650 (for which there is an explicit test).
3652 PH/26 Added the /no_tell option to "control=freeze".
3654 PH/27 If a host name lookup failed very early in a connection, for example, if
3655 the IP address matched host_lookup and the reverse lookup yielded a name
3656 that did not have a forward lookup, an error message of the form "no IP
3657 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3658 could be logged. Now it outputs the IP address instead of "NULL".
3660 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3661 allows the sender and the authenticated sender to be set when
3662 submitting a message from within Exim. Since child_open_exim() is
3663 documented for local_scan(), the new function should be too.
3665 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3666 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3667 results in an empty string is now treated as unset.
3669 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3671 PH/31 Added sender_verify_fail logging option.
3673 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3674 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3675 tidied the source and removed it altogether.
3677 PH/33 When a queue run was abandoned because the load average was too high, a
3678 log line was always written; now it is written only if the queue_run log
3679 selector is set. In addition, the log line for abandonment now contains
3680 information about the queue run such as the pid. This is always present
3681 in "start" and "stop" lines but was omitted from the "abandon" line.
3683 PH/34 Omit spaces between a header name and the colon in the error message that
3684 is given when verify = headers_syntax fails (if there are lots of them,
3685 the message gets confusing).
3687 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3688 names, as there are now some PTR records that contain slashes. This check
3689 is only to protect against broken name servers that fall over on strange
3690 characters, so the fact that it applies to all lookups doesn't matter.
3692 PH/36 Now that the new test suite is complete, we can remove some of the
3693 special code in Exim that was needed for the old test suite. For example,
3694 sorting DNS records because real resolvers return them in an arbitrary
3695 order. The new test suite's fake resolver always returns records in the
3698 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3699 bounces) except when queue_only is set, to avoid logging races between
3700 the different processes.
3702 PH/38 Panic-die if .include specifies a non-absolute path.
3704 PH/39 A tweak to the "H" retry rule from its user.
3706 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3707 a label. They prevented compilation on older perls.
3709 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3710 a warning to be raised on newish perls.
3712 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3713 on queue. Changes to match documented behaviour of showing count of
3714 messages matching specified criteria.
3716 PH/40 Changed the default ident timeout from 30s to 5s.
3718 PH/41 Added support for the use of login_cap features, on those BSD systems
3719 that have them, for controlling the resources used by pipe deliveries.
3721 PH/42 The content-scanning code uses fopen() to create files in which to put
3722 message data. Previously it was not paying any attention to the mode of
3723 the files. Exim runs with umask(0) because the rest of the code creates
3724 files with open(), and sets the required mode explicitly. Thus, these
3725 files were ending up world-writeable. This was not a big issue, because,
3726 being within the spool directory, they were not world-accessible. I have
3727 created a function called modefopen, which takes an additional mode
3728 argument. It sets umask(777), creates the file, chmods it to the required
3729 mode, then resets the umask. All the relevant calls to fopen() in the
3730 content scanning code have been changed to use this function.
3732 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3733 to 24 hours. This avoids potential overflow problems when processing G
3734 and H retry rules. I suspect nobody ever tinkers with this value.
3736 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3738 PH/45 When the plaintext authenticator is running as a client, the server's
3739 challenges are checked to ensure they are valid base64 strings. By
3740 default, the authentication attempt is cancelled if an invalid string is
3741 received. Setting client_ignore_invalid_base64 true ignores these errors.
3742 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3743 they are received. Thus, the responses can be made to depend on the
3744 challenges. If an invalid string is ignored, an empty string is placed in
3747 PH/46 Messages that are created by the autoreply transport now contains a
3748 References: header, in accordance with RFCs 2822 and 3834.
3750 PH/47 Added authenticated_sender_force to the smtp transport.
3752 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3754 PH/49 Installed latest patch from the Sieve maintainer.
3756 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3757 was also set, the appendfile transport was unnecessarily scanning a
3758 directory of message files (e.g. for maildir delivery) to find the count
3759 of files (along with the size), even though it did not need this
3760 information. It now does the scan only if it needs to find either the
3761 size of the count of files.
3763 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3765 PH/52 Two bugs concerned with error handling when the smtp transport is
3768 (i) Exim was not creating retry information for temporary errors given
3769 for individual recipients after the DATA command when the smtp transport
3770 was used in LMTP mode. This meant that they could be retried too
3771 frequently, and not timed out correctly.
3773 (ii) Exim was setting the flag that allows error details to be returned
3774 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3775 recipients that were returned after the DATA command.
3777 PH/53 This is related to PH/52, but is more general: for any failing address,
3778 when detailed error information was permitted to be returned to the
3779 sender, but the error was temporary, then after the final timeout, only
3780 "retry timeout exceeded" was returned. Now it returns the full error as
3781 well as "retry timeout exceeded".
3783 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3784 do this, and (what is worse) MTAs that accept it.
3786 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3787 will now be deprecated.
3789 PH/56 New os.c-cygwin from the Cygwin maintainer.
3791 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3792 formats (previously only available in exim formats via -bpr, -bpru,
3793 and -bpra. Now also available in native and exiqgrep formats)
3795 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3796 with very large, slow to parse queues
3798 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3800 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3802 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3803 responses to authentication challenges, though it was showing the
3804 challenges; (ii) I've removed the CR characters from the debug output for
3807 PH/58 Allow for the insertion of a newline as well as a space when a string
3808 is turned into more than one encoded-word during RFC 2047 encoding. The
3809 Sieve code now uses this.
3811 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3812 data_4xx, lost_connection, tls_required.
3814 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3815 message was being sent as an SMTP response.
3817 PH/61 Add -l and -k options to exicyclog.
3819 PH/62 When verifying, if an address was redirected to one new address, so that
3820 verification continued, and the new address failed or deferred after
3821 having set something in $address_data, the value of $address_data was not
3822 passed back to the ACL. This was different to the case when no
3823 redirection occurred. The value is now passed back in both cases.
3825 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3826 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3827 use login_cap.h, so on its own it isn't the distinguishing feature. The
3828 new name refers directly to the setclassresources() function.
3830 PH/65 Added configuration files for NetBSD3.
3832 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3834 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3835 is preferred over IPv4.
3837 PH/68 The bounce_return_message and bounce_return_body options were not being
3838 honoured for bounces generated during the reception of non-SMTP messages.
3839 In particular, this applied to messages rejected by the ACL. This bug has
3840 been fixed. However, if bounce_return_message is true and bounce_return_
3841 body is false, the headers that are returned for a non-SMTP message
3842 include only those that have been read before the error was detected.
3843 (In the case of an ACL rejection, they have all been read.)
3845 PH/69 The HTML version of the specification is now built in a directory called
3846 spec_html instead of spec.html, because the latter looks like a path with
3847 a MIME-type, and this confuses some software.
3849 PH/70 Catch two compiler warnings in sieve.c.
3851 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3852 function verify_get_ident() calls ip_connect() to connect a socket, but
3853 if the "connect()" function timed out, ip_connect() used to close the
3854 socket. However, verify_get_ident() also closes the socket later, and in
3855 between Exim writes to the log, which may get opened at this point. When
3856 the socket was closed in ip_connect(), the log could get the same file
3857 descriptor number as the socket. This naturally causes chaos. The fix is
3858 not to close the socket in ip_connect(); the socket should be closed by
3859 the function that creates it. There was only one place in the code where
3860 this was missing, in the iplookup router, which I don't think anybody now
3861 uses, but I've fixed it anyway.
3863 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3864 well as to direct DNS lookups. Otherwise the handling of names in host
3865 lists is inconsistent and therefore confusing.
3871 PH/01 Two changes to the default runtime configuration:
3873 (1) Move the checks for relay_from_hosts and authenticated clients from
3874 after to before the (commented out) DNS black list checks.
3876 (2) Add control=submission to the relay_from_hosts and authenticated
3877 clients checks, on the grounds that messages accepted by these
3878 statements are most likely to be submissions.
3880 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3882 (1) Generate an error if the third argument for the ${prvs expansion is
3885 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3888 (3) Reset the variables that are obtained from the first argument of
3889 ${prvscheck and used in the second argument before leaving the code,
3890 because their memory is reclaimed, so using them afterwards may do
3893 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3894 one (it's much easier than Tom thought :-).
3896 (5) Because of (4), we can now allow for the use of $prvscheck_result
3897 inside the third argument.
3899 PH/03 For some reason, the default setting of PATH when running a command from
3900 a pipe transport was just "/usr/bin". I have changed it to
3903 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3904 anything to be listed in the output from -bV.
3906 PH/05 When a filter generated an autoreply, the entire To: header line was
3907 quoted in the delivery log line, like this:
3909 => >A.N.Other <ano@some.domain> <original@ddress> ...
3911 This has been changed so that it extracts the operative address. There
3912 may be more than one such address. If so, they are comma-separated, like
3915 => >ano@some.domain,ona@other.domain <original@ddress> ...
3917 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3918 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3919 not being looked up in the rDNS to get a host name, Exim was showing the
3920 IP address twice in Received: lines, even though the IP addresses were
3921 identical. For example:
3923 Received: from [1.2.3.4] (helo=[1.2.3.4])
3925 However, if the real host name was known, it was omitting the HELO data
3926 if it matched the actual IP address. This has been tidied up so that it
3927 doesn't show the same IP address twice.
3929 PH/07 When both +timestamp and +memory debugging was on, the value given by
3930 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3931 called by the debug printing, thereby overwriting the timestamp buffer.
3932 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3934 PH/08 When the original message was included in an autoreply transport, it
3935 always said "this is a copy of the message, including all the headers",
3936 even if body_only or headers_only was set. It now gives an appropriate
3939 PH/09 Applied a patch from the Sieve maintainer which:
3941 o fixes some comments
3942 o adds the (disabled) notify extension core
3943 o adds some debug output for the result of if/elsif tests
3944 o points to the current vacation draft in the documentation
3945 and documents the missing references header update
3949 o fixes a bug in processing the envelope test (when testing
3950 multiple envelope elements, the last element determined the
3953 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3954 Electronic Mail") by including:
3956 Auto-submitted: auto-generated
3958 in the messages that it generates (bounce messages and others, such as
3959 warnings). In the case of bounce messages for non-SMTP messages, there was
3960 also a typo: it was using "Auto_submitted" (underscore instead of
3961 hyphen). Since every message generated by Exim is necessarily in response
3962 to another message, thes have all been changed to:
3964 Auto-Submitted: auto-replied
3966 in accordance with these statements in the RFC:
3968 The auto-replied keyword:
3970 - SHOULD be used on messages sent in direct response to another
3971 message by an automatic process,
3973 - MUST NOT be used on manually-generated messages,
3975 - MAY be used on Delivery Status Notifications (DSNs) and Message
3976 Disposition Notifications (MDNs),
3978 - MUST NOT be used on messages generated by automatic or periodic
3979 processes, except for messages which are automatic responses to
3982 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3983 to the default Received: header definition.
3985 PH/12 Added log selector acl_warn_skipped (default on).
3987 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3988 variables because (a) they are in the wrong storage pool and (b) even if
3989 they were copied, it wouldn't work properly because of the caching.
3991 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3992 checking when decoding. Apparently there are clients that generate
3993 overlong encoded strings. Why am I not surprised?
3995 PH/15 If the first argument of "${if match_address" was not empty, but did not
3996 contain an "@" character, Exim crashed. Now it writes a panic log message
3997 and treats the condition as false.
3999 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4001 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4002 extension "envelope-auth". The code is finished and in agreement with
4003 other implementations, but there is no documentation so far and in fact,
4004 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4005 not changing the active code.
4007 Print executed "if" and "elsif" statements when debugging is used. This
4008 helps a great deal to understand what a filter does.
4010 Document more things not specified clearly in RFC3028. I had all this
4011 sorted out, when out of a sudden new issues came to my mind. Oops."
4013 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4016 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4017 canonical form (as documented). However, after a host name lookup from
4018 the IP address, check_host() was doing a simple string comparison with
4019 addresses acquired from the DNS when checking that the found name did
4020 have the original IP as one of its addresses. Since any found IPv6
4021 addresses are likely to be in abbreviated form, the comparison could
4022 fail. Luckily, there already exists a function for doing the comparison
4023 by converting both addresses to binary, so now that is used instead of
4024 the text comparison.
4026 PH/20 There was another similar case to PH/19, when a complete host name was
4027 given in a host list; looking up its IP address could give an abbreviated
4028 form, whereas the current host's name might or might not be abbreviated.
4029 The same fix has been applied.
4035 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4036 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4039 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4040 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4042 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4044 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4045 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4046 Also, for "Auto-Submitted", treat anything other than "no" as
4047 non-personal, in accordance with RFC 3834. (Previously it treated
4048 anything starting "auto-" as non-personal.)
4050 TF/01 The control=submission/name=... option had a problem with syntax
4051 errors if the name included a slash character. The /name= option
4052 now slurps the rest of the string, so it can include any characters
4053 but it must come last in the list of options (after /sender_retain
4056 PH/05 Some modifications to the interface to the fake nameserver for the new
4064 TK/01 Added the "success_on_redirect" address verification option. See
4065 NewStuff for rationale and an example.
4067 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4069 PH/02 Patch to exigrep to allow it to work on syslog lines.
4071 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4072 fread() to skip over the body file's header line, because in Cygwin the
4073 header line is locked and is inaccessible.
4075 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4076 co-exist for some time) to make it clear that it is the Exim ID that is
4077 referenced, not the Message-ID: header line.
4079 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4080 string_format() function, because snprintf() does not exist on all
4083 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4084 ${stat: expansion item.
4086 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4087 protocol synchronization error", to keep the pedants happy.
4089 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4090 well as for IRIX systems, when gcc is being used. See the host.c source
4093 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4095 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4098 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4099 transport and to the smtp transport in LMTP mode.
4101 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4103 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4104 run a filter in a subprocess. This could lead to confusion in subsequent
4105 lookups in the parent process. There should also be a search_tidyup() at
4106 the end of the subprocess.
4108 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4109 only if the host matched helo_try_verify_hosts, which caused the
4110 verification to occur when the EHLO/HELO command was issued. The ACL just
4111 tested the remembered result. Now, if a previous verification attempt has
4112 not happened, "verify = helo" does it there and then.
4114 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4116 TK/03 Fix log output including CR from clamd.
4118 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4119 exist provoked a memory error which could cause a segfault.
4121 PH/15 Installed PCRE 6.2
4123 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4125 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4126 of the problem. Specifically, suggested +O2 rather than +O1 for the
4129 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4131 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4132 record, the port was not correctly logged when the outgoing_port log
4133 selector was set (it logged the transort's default port).
4135 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4136 fallback_hosts, and "hosts" in the smtp transport.
4138 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4139 host errors such as "Connection refused".
4141 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4142 authentication with radiusclient 0.4.9:
4144 - Error returned from rc_read_config was caught wrongly
4145 - Username/password not passed on to radius server due to wrong length.
4147 The presumption is that some radiusclient API changes for 4.51/PH/17
4148 were not taken care of correctly. The code is still untested by me (my
4149 Linux distribution still has 0.3.2 of radiusclient), but it was
4150 contributed by a Radius user.
4152 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4153 expanding the "port" option of the smtp transport.
4155 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4156 while reading a MIME header. Thanks to Tom Hughes for a patch.
4158 PH/24 Include config.h inside local_scan.h so that configuration settings are
4161 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4162 that in an ACL for RCPT (for example), you can examine exactly what was
4165 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4166 commands, but it was not correctly comparing the address with the actual
4167 client host address. Thus, it would show the EHLO address in Received:
4168 header lines when this was not necessary.
4170 PH/27 Added the % operator to ${eval:}.
4172 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4173 it should be ignoring failures (because with -C, for example, it has lost
4174 privilege). It wasn't ignoring creation failures other than "already
4177 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4180 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4181 because an input line was too long, either on its own, or by virtue of
4182 too many continuations, the temporary file was not being removed, and the
4183 return code was incorrect.
4185 PH/31 Missing "BOOL" in function definition in filtertest.c.
4187 PH/32 Applied Sieve patches from the maintainer.
4189 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4191 PH/33 Added "verify = not_blind".
4193 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4194 Local/Makefile (with some defaults set). These are used in built scripts
4195 such as exicyclog, but they have never been used in the exim_install
4196 script (though there are many overriding facilities there). I have
4197 arranged that the exim_install script now takes note of these two
4200 PH/35 Installed configuration files for Dragonfly.
4202 PH/36 When a locally submitted message by a trusted user did not contain a
4203 From: header, and the sender address was obtained from -f or from an SMTP
4204 MAIL command, and the trusted user did not use -F to supply a sender
4205 name, $originator_name was incorrectly used when constructing a From:
4206 header. Furthermore, $originator_name was used for submission mode
4207 messages from external hosts without From: headers in a similar way,
4208 which is clearly wrong.
4210 PH/37 Added control=suppress_local_fixups.
4212 PH/38 When log_selector = +received_sender was set, and the addition of the
4213 sender made the log line's construction buffer exactly full, or one byte
4214 less than full, an overflow happened when the terminating "\n" was
4217 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4218 when the result of a list match is failure because a DNS lookup failed.
4220 PH/40 RM_COMMAND is now used in the building process.
4222 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4223 the "build-* directories that it finds.
4225 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4226 address in a domain literal was a prefix of an interface address.
4228 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4229 when verifying a sender address, unless rewrite_headers is false.
4231 PH/44 Wrote a long comment about why errors_to addresses are verified as
4232 recipients, not senders.
4234 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4235 the ratelimit ACL was added.
4237 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4239 PH/46 Added extra information about PostgreSQL errors to the error string.
4241 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4242 avoiding the need to install special zones in a real server. This is
4243 backwards compatible; if it can't find the fake resolver, it drops back.
4244 Thus, both old and new test suites can be run.
4246 TF/02 Added util/ratelimit.pl
4248 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4249 clock is set back in time.
4251 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4252 Candler <B.Candler@pobox.com>.
4254 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4255 OK for addresses that are the result of redirections.
4257 PH/48 A number of further additions for the benefit of the new test suite,
4258 including a fake gethostbyname() that interfaces to the fake DNS resolver
4261 TF/06 The fix for widen_domains has also been applied to qualify_single and
4262 search_parents which are the other dnslookup options that can cause
4265 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4268 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4270 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4271 service" if it encountered an MX record with an empty target hostname.
4272 The message is now "an MX or SRV record indicated no SMTP service".
4274 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4275 if the DNS of the sending site is misconfigured. This is quite a
4276 common situation. This change restores the behaviour of treating a
4277 helo verification defer as a failure.
4279 PH/51 If self=fail was set on a router, the bounce message did not include the
4280 actual error message.
4286 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4288 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4289 command itself ended in error, the underlying message about the transport
4290 filter timeout was being overwritten with the pipe command error. Now the
4291 underlying error message should be appended to the second error message.
4293 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4295 PH/02 Reduce the amount of output that "make" produces by default. Full output
4296 can still be requested.
4298 PH/03 The warning log line about a condition test deferring for a "warn" verb
4299 was being output only once per connection, rather than after each
4300 occurrence (because it was using the same function as for successful
4301 "warn" verbs). This seems wrong, so I have changed it.
4303 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4304 it should not have, which might have caused a crash in the right
4305 circumstances, but probably never did.
4307 PH/04 Installed a modified version of Tony Finch's patch to make submission
4308 mode fix the return path as well as the Sender: header line, and to
4309 add a /name= option so that you can make the user's friendly name appear
4312 TF/03 Added the control = fakedefer ACL modifier.
4314 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4315 Mark Lowes for thorough testing.
4317 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4319 TK/03 Merged latest SRS patch from Miles Wilton.
4321 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4322 with the definition in sysexits.h (which is #included earlier).
4323 Fortunately, Exim does not actually use EX_OK. The code used to try to
4324 preserve the sysexits.h value, by assuming that macro definitions were
4325 scanned for macro replacements. I have been disabused of this notion,
4326 so now the code just undefines EX_OK before #including unistd.h.
4328 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4329 in the smtp transport. When a block could not be written in a single
4330 write() function, the timeout was being re-applied to each part-write.
4331 This seems wrong - if the receiver was accepting one byte at a time it
4332 would take for ever. The timeout is now adjusted when this happens. It
4333 doesn't have to be particularly precise.
4335 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4336 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4338 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4339 without a domain if the check to <postmaster@domain> fails.
4341 SC/01 Eximstats: added -xls and the ability to specify output files
4342 (patch written by Frank Heydlauf).
4344 SC/02 Eximstats: use FileHandles for outputting results.
4346 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4348 SC/04 Eximstats: fixed display of large numbers with -nvr option
4350 SC/05 Eximstats: fixed merging of reports with empty tables.
4352 SC/06 Eximstats: added the -include_original_destination flag
4354 SC/07 Eximstats: removed tabs and trailing whitespace.
4356 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4358 TK/06 MBOX spool code: Add real "From " MBOX separator line
4359 so the .eml file is really in mbox format (even though
4360 most programs do not really care). Patch from Alex Miller.
4362 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4363 The latter is generated from $received_to and is only set if the
4364 message has one envelope recipient. SA can use these headers,
4365 obviously out-of-the-box. Patch from Alex Miller.
4367 PH/08 The ${def test on a variable was returning false if the variable's
4368 value was "0", contrary to what the specification has always said!
4369 The result should be true unless the variable is empty.
4371 PH/09 The syntax error of a character other than { following "${if
4372 def:variable_name" (after optional whitespace) was not being diagnosed.
4373 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4374 accidental colon was present, for example, could give incorrect results.
4376 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4377 result is used (not including appendfile, where other changes are about
4380 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4381 This involved changing a lot of size variables from int to off_t. It
4382 should work with maildirs and everything.
4384 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4385 spamd dying while we are connected to it.
4387 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4390 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4391 function for BDB 4.3.
4393 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4395 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4396 the sources for PCRE have been re-arranged and more files are now
4399 PH/15 The code I had for printing potentially long long variables in PH/11
4400 above was not the best (it lost precision). The length of off_t variables
4401 is now inspected at build time, and an appropriate printing format (%ld
4402 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4403 to be "long long int" or "long int". This is needed for the internal
4404 formatting function string_vformat().
4406 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4407 the configuration file to be ":syslog", then the script "guesses" where
4408 the logs files are, rather than using the compiled in default. In our
4409 case the guess is not the same as the compiled default, so the script
4410 suddenly stopped working when I started to use syslog. The patch checks
4411 to see if log_file_path is "". If so, it attempts to read it from exim
4412 with no configuration file to get the compiled in version, before it
4413 falls back to the previous guessing code."
4415 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4416 implementing BATV in an Exim configuration. See NewStuff for the gory
4419 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4420 Makefile that are specific to HP-UX.
4422 PH/18 If the "use_postmaster" option was set for a recipient callout together
4423 with the "random" option, the postmaster address was used as the MAIL
4424 FROM address for the random test, but not for the subsequent recipient
4425 test. It is now used for both.
4427 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4428 patch removes a few documentation additions to RFC 3028, because the
4429 latest draft now contains them. It adds the new en;ascii-case comparator
4430 and a new error check for 8bit text in MIME parts. Comparator and
4431 require names are now matched exactly. I enabled the subaddress
4432 extension, but it is not well tested yet (read: it works for me)."
4434 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4435 rework some of the code of TK/09 above to avoid the hardwired use of
4436 "%lld" and "long long". Replaced the call to snprintf() with a call to
4439 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4440 records point to non-existent hosts", "retry timeout exceeded", and
4441 "retry time not reached for any host after a long failure period".
4443 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4444 experimental DomainKeys support:
4446 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4447 (2) On an error such as an illegally used "control", the wrong name for
4448 the control was given.
4450 These problems did NOT occur unless DomainKeys support was compiled.
4452 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4454 PH/24 Added ${if match_ip condition.
4456 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4457 databases so that it will be absolutely obvious if a crash occurs in the
4458 DB library. This is a regular occurrence (often caused by mis-matched
4461 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4462 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4463 picked up on a user's system that detects such things. There doesn't seem
4464 to be a gcc warning option for this - only an attribute that has to be
4465 put on the function's prototype. It seems that in Fedora Core 4 they have
4466 set this on a number of new functions. No doubt there will be more in due
4469 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4470 specify a transport. However, if an address that was verified by such a
4471 router was the subject of a callout, Exim crashed because it tried to
4472 read the rcpt_include_affixes from the non-existent transport. Now it
4473 just assumes that the setting of that option is false. This bug was
4474 introduced by 4.51/PH/31.
4476 PH/28 Changed -d+all to exclude +memory, because that information is very
4477 rarely of interest, but it makes the output a lot bigger. People tend to
4478 do -d+all out of habit.
4480 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4481 code in os-type was giving problems when libc.so lives in lib64, like on
4484 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4485 aren't the modern standard, and it seems that some systems' include files
4486 don't always have them. Exim was already checking for some of the newer
4487 ones like T_AAAA, and defining it itself. I've added checks for all the
4488 record types that Exim uses.
4490 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4491 not automatically generating a new one, as it is supposed to. This
4492 prevented TLS from working. If the file did exist, but contained invalid
4493 data, a new version was generated, as expected. It was only the case of a
4494 non-existent file that was broken.
4496 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4497 with a change in libdomainkeys > 0.64.
4499 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4500 from DNS. If the selector record carries the flag, it now has
4501 precedence over the domain-wide flag.
4503 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4505 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4506 the use of a port name that isn't defined in /etc/services) occurred, the
4507 message was deferred as in a normal delivery, and thus remained on the
4508 spool, instead of being failed because of the mua_wrapper setting. This
4509 is now fixed, and I tidied up some of the mua_wrapper messages at the
4512 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4513 the messages in a hash of arrays rather than using individual hashes.
4514 This is a bit cleaner and results in dramatic memory savings, albeit
4515 at a slight CPU cost.
4517 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4518 as requested by Marc Sherman.
4520 SC/10 Eximstats: added histograms for user specified patterns as requested
4523 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4525 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4526 fopen() in the content-scanning modules that did not already have it.
4532 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4533 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4535 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4537 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4539 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4540 to test Sieve filters that use "vacation".
4542 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4543 that changes the way the GnuTLS parameters are stored in the cache file.
4544 The new format can be generated externally. For backward compatibility,
4545 if the data in the cache doesn't make sense, Exim assumes it has read an
4546 old-format file, and it generates new data and writes a new file. This
4547 means that you can't go back to an older release without removing the
4550 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4551 work if there are any delivery delays because "one_time" forces the
4552 parent to be marked "delivered", so its unseen clone is never tried
4553 again. For this reason, Exim now forbids the simultaneous setting of
4556 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4557 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4558 entry if you want to know the details. The fix, however, neglected to
4559 consider the case when local delivery batching is involved. The test for
4560 "previously delivered" was not happening when checking to see if an
4561 address could be batched with a previous (undelivered) one; under
4562 certain circumstances this could lead to multiple deliveries to the same
4565 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4566 in its include files, and this causes problems building Exim.
4568 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4569 header_syntax) but Exim was just ignoring anything given after a slash.
4570 In particular, this caused confusion with an attempt to use "verify =
4571 reverse_host_lookup/defer_ok". An error is now given when options are
4572 supplied for verify items that do not have them. (Maybe reverse_host_
4573 lookup should have a defer_ok option, but that's a different point.)
4575 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4576 defined by RFC 821) to 2048, because there were problems with some AUTH
4577 commands, and RFC 1869 says the size should be increased for extended
4578 SMTP commands that take arguments.
4580 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4583 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4584 "unknown" error; now it says that the functionality isn't in the binary.
4586 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4587 an address' error message when a string expansion fails (syntax or
4588 whatever). Otherwise the password may appear in the log. Following change
4589 PH/42 below, there is no longer a chance of it appearing in a bounce
4592 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4594 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4595 of its addresses was ever tried. (Bugzilla bug #2.)
4597 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4598 the result incorrectly in the debug output. (It correctly added a newline
4599 to what was transported.)
4601 TF/01 Added $received_time.
4603 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4604 commented out examples of how to interface to a virus scanner and to
4605 SpamAssassin. Also added commented examples of av_scanner and
4606 spamd_address settings.
4608 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4609 and controls are allowed in which ACLs. There were a couple of minor
4610 errors. Some of the entries in the conditions table (which is a table of
4611 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4612 negation of where the condition IS allowed.
4614 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4616 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4617 header file does not have a version number, so I've had to invent a new
4618 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4619 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4620 radiusclient), but it was contributed by a Radius user.
4622 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4623 files or directories, for OpenSSL.
4625 PH/19 When an Exim process that is running as root has to create an Exim log
4626 file, it does so in a subprocess that runs as exim:exim so as to get the
4627 ownership right at creation (otherwise, other Exim processes might see
4628 the file with the wrong ownership). There was no test for failure of this
4629 fork() call, which would lead to the process getting stuck as it waited
4630 for a non-existent subprocess. Forks do occasionally fail when resources
4631 run out. I reviewed all the other calls to fork(); they all seem to check
4634 PH/20 When checking for unexpected SMTP input at connect time (before writing
4635 the banner), Exim was not dealing correctly with a non-positive return
4636 from the read() function. If the client had disconnected by this time,
4637 the result was a log entry for a synchronization error with an empty
4638 string after "input=" when read() returned zero. If read() returned -1
4639 (an event I could not check), uninitialized data bytes were printed.
4640 There were reports of junk text (parts of files, etc) appearing after
4643 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4645 PH/22 Added support for macro redefinition, and (re)definition in between
4646 driver and ACL definitions.
4648 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4649 forgetting to use the resulting value; it was using the unexpanded value.
4651 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4652 hadn't been configured. The fix is from Juergen Kreileder, who
4653 understands it better than I do:
4655 "Here's what I see happening with three configured cyrus_sasl
4656 authenticators configured (plain, login, cram-md5):
4658 On startup auth_cyrus_sasl_init() gets called for each of these.
4659 This means three calls to sasl_listmech() without a specified mech_list.
4660 => SASL tests which mechs of all available mechs actually work
4661 => three warnings about OTP not working
4662 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4664 With the patch, sasl_listmech() also gets called three times. But now
4665 SASL's mech_list option is set to the server_mech specified in the the
4666 authenticator. Or in other words, the answer from sasl_listmech()
4667 gets limited to just the mech you're testing for (which is different
4669 => the return list contains just 'plain' or 'login', 'cram-md5' or
4670 nothing depending on the value of ob->server_mech.
4672 I've just tested the patch: Authentication still works fine,
4673 unavailable mechs specified in the exim configuration are still
4674 caught, and the auth.log warnings about OTP are gone."
4676 PH/25 When debugging is enabled, the contents of the command line are added
4677 to the debugging output, even when log_selector=+arguments is not
4680 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4681 answer is "GNU", and only if the return is "GNU/something" is the answer
4684 PH/27 $acl_verify_message is now set immediately after the failure of a
4685 verification in an ACL, and so is available in subsequent modifiers. In
4686 particular, the message can be preserved by coding like this:
4688 warn !verify = sender
4689 set acl_m0 = $acl_verify_message
4691 Previously, $acl_verify_message was set only while expanding "message"
4692 and "log_message" when a very denied access.
4694 PH/28 Modified OS/os.c-Linux with
4696 -#ifndef OS_LOAD_AVERAGE
4697 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4699 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4700 nomenclature these days.)
4702 PH/29 Installed patch from the Sieve maintainer that adds the options
4703 sieve_useraddress and sieve_subaddress to the redirect router.
4705 PH/30 In these circumstances:
4706 . Two addresses routed to the same list of hosts;
4707 . First host does not offer TLS;
4708 . First host accepts first address;
4709 . First host gives temporary error to second address;
4710 . Second host offers TLS and a TLS session is established;
4711 . Second host accepts second address.
4712 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4713 and peerdn, if requested) that were in fact used only for the second
4716 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4717 attention to any local part prefix or suffix that was matched by the
4718 router that accepted the address. It now behaves in the same way as it
4719 does for delivery: the affixes are removed from the local part unless
4720 rcpt_include_affixes is set on the transport.
4722 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4723 timeout during the DATA phase of an incoming message.
4725 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4726 applied a patch sanctioned by the Sieve maintainer.
4728 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4729 the uid or gid is negative. A case of a negative gid caused this to be
4730 noticed. The fix allows for either to be negative.
4732 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4733 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4736 PH/36 The change PH/12 above was broken. Fixed it.
4738 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4739 the grounds that routing the same address twice would always produce the
4740 same answer. This might have been true once, but it is certainly no
4741 longer true now. Routing a child address may depend on the previous
4742 routing that produced that child. Some complicated redirection strategies
4743 went wrong when messages had multiple recipients, and made Exim's
4744 behaviour dependent on the order in which the addresses were given.
4746 I have moved the duplicate checking until after the routing is complete.
4747 Exim scans the addresses that are assigned to local and remote
4748 transports, and removes any duplicates. This means that more work will be
4749 done, as duplicates will always all be routed, but duplicates are
4750 presumably rare, so I don't expect this is of any significance.
4752 For deliveries to pipes, files, and autoreplies, the duplicate checking
4753 still happens during the routing process, since they are not going to be
4756 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4757 It corrects a timeout issue with spamd. This is Ian's comment: "The
4758 background is that sometimes spamd either never reads data from a
4759 connection it has accepted, or it never writes response data. The exiscan
4760 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4761 blindly assumes that writes won't block so it may never time out."
4763 PH/39 Allow G after quota size as well as K and M.
4765 PH/40 The value set for $authenticated_id in an authenticator may not contain
4766 binary zeroes or newlines because the value is written to log lines and
4767 to spool files. There was no check on this. Now the value is run through
4768 the string_printing() function so that such characters are converted to
4769 printable escape sequences.
4771 PH/41 $message_linecount is a new variable that contains the total number of
4772 lines in the message. Compare $body_linecount, which is the count for the
4775 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4776 bounce and delay warning messages, except in certain special cases, which
4779 (a) An SMTP error message from a remote host;
4780 (b) A message specified in a :fail: redirection;
4781 (c) A message specified in a "fail" command in a system filter;
4782 (d) A message specified in a FAIL return from the queryprogram router;
4783 (e) A message specified by the cannot_route_message router option.
4785 In these cases only, Exim does include the error details in bounce and
4786 warning messages. There are also a few cases where bland messages such
4787 as "unrouteable address" or "local delivery error" are given.
4789 PH/43 $value is now also set for the "else" part of a ${run expansion.
4791 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4792 being worked on, but at least Exim now implements the latest version to
4795 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4796 process to complete was treated as a delivery failure, a timeout while
4797 writing the message to the pipe was logged, but erroneously treated as a
4798 successful delivery. Such timeouts include transport filter timeouts. For
4799 consistency with the overall process timeout, these timeouts are now
4800 treated as errors, giving rise to delivery failures by default. However,
4801 there is now a new Boolean option for the pipe transport called
4802 timeout_defer, which, if set TRUE, converts the failures into defers for
4803 both kinds of timeout. A transport filter timeout is now identified in
4806 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4807 systems where "make" and "gmake" are different, calling "gmake" at top
4808 level broke things. I've arranged for the value of $(MAKE) to be passed
4809 from the Makefile to this script so that it can call the same version of
4813 A note about Exim versions 4.44 and 4.50
4814 ----------------------------------------
4816 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4817 changes of various kinds. As a consequence, a big documentation update was
4818 needed. This delayed the release for rather longer than seemed good, especially
4819 in the light of a couple of (minor) security issues. Therefore, the changes
4820 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4821 release. So 4.44 and 4.50 are in effect two different branches that both start
4824 I have left the 4.50 change log unchanged; it contains all the changes since
4825 4.43. The change log for 4.44 is below; many of its items are identical to
4826 those for 4.50. This seems to be the most sensible way to preserve the
4827 historical information.
4833 1. Minor wording change to the doc/README.SIEVE file.
4835 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4836 computation of the current number of files was incorrect.
4838 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4839 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4842 4. Give more explanation in the error message when the command for a transport
4843 filter fails to execute.
4845 5. There are several places where Exim runs a non-Exim command in a
4846 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4847 was being done only for the command run by the queryprogram router. It is
4848 now done for all such subprocesses. The other cases are: ${run, transport
4849 filters, and the commands run by the lmtp and pipe transports.
4851 6. Added CONFIGURE_GROUP build-time option.
4853 7. Some older OS have a limit of 256 on the maximum number of file
4854 descriptors. Exim was using setrlimit() to set 1000 as a large value
4855 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4856 systems. I've change it so that if it can't get 1000, it tries for 256.
4858 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4859 was an oversight, and furthermore, ever since the addition of extra
4860 controls (e.g. 4.43/32), the checks on when to allow different forms of
4861 "control" were broken. There should now be diagnostics for all cases when a
4862 control that does not make sense is encountered.
4864 9. Added the /retain_sender option to "control=submission".
4866 10. $recipients is now available in the predata ACL (oversight).
4868 11. Tidy the search cache before the fork to do a delivery from a message
4869 received from the command line. Otherwise the child will trigger a lookup
4870 failure and thereby defer the delivery if it tries to use (for example) a
4871 cached ldap connection that the parent has called unbind on.
4873 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4874 of $address_data from the recipient verification was clobbered by the
4875 sender verification.
4877 13. The value of address_data from a sender verification is now available in
4878 $sender_address_data in subsequent conditions in the ACL statement.
4880 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4882 15. Added a new option "connect=<time>" to callout options, to set a different
4885 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4886 was its contents. (It was OK if the option was not defined at all.)
4888 17. A "Completed" log line is now written for messages that are removed from
4889 the spool by the -Mrm option.
4891 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4892 information about exactly what failed.
4894 19. Added -dd to debug only the daemon process.
4896 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4897 handles timeouts, both on the server side and network timeouts. Renamed the
4898 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4900 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4901 It is now set to "smtps".
4903 22. $host_address is now set to the target address during the checking of
4904 ignore_target_hosts.
4906 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4907 being passed; this would have caused $sender_host_name to have been used if
4908 matching the list had actually called for a host name (not very likely,
4909 since this list is usually IP addresses). A host name is now passed as
4912 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4913 code that specifies a non-restarting handler (typically sigaction() in
4914 modern systems) in an attempt to fix a rare and obscure crash bug.
4916 25. Narrowed the window for a race in the daemon that could cause it to ignore
4917 SIGCHLD signals. This is not a major problem, because they are used only to
4918 wake it up if nothing else does.
4920 26. A malformed maildirsize file could cause Exim to calculate negative values
4921 for the mailbox size or file count. Odd effects could occur as a result.
4922 The maildirsize information is now recalculated if the size or filecount
4925 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4926 support for a long time. Removed HAVE_SYS_VFS_H.
4928 28. Installed the latest version of exipick from John Jetmore.
4930 29. In an address list, if the pattern was not a regular expression, an empty
4931 subject address (from a bounce message) matched only if the pattern was an
4932 empty string. Non-empty patterns were not even tested. This was the wrong
4933 because it is perfectly reasonable to use an empty address as part of a
4934 database query. An empty address is now tested by patterns that are
4935 lookups. However, all the other forms of pattern expect the subject to
4936 contain a local part and a domain, and therefore, for them, an empty
4937 address still always fails if the pattern is not itself empty.
4939 30. Exim went into a mad DNS loop when attempting to do a callout where the
4940 host was specified on an smtp transport, and looking it up yielded more
4941 than one IP address.
4943 31. Re-factored the code for checking spool and log partition space into a
4944 function that finds that data and another that does the check. The former
4945 is then used to implement four new variables: $spool_space, $log_space,
4946 $spool_inodes, and $log_inodes.
4948 32. The RFC2047 encoding function was originally intended for short strings
4949 such as real names; it was not keeping to the 75-character limit for
4950 encoded words that the RFC imposes. It now respects the limit, and
4951 generates multiple encoded words if necessary. To be on the safe side, I
4952 have increased the buffer size for the ${rfc2047: expansion operator from
4955 33. It is now permitted to omit both strings after an "if" condition; if the
4956 condition is true, the result is "true". As before, when the second string
4957 is omitted, a false condition yields an empty string. This makes it less
4958 cumbersome to write custom ACL and router conditions.
4960 34. Failure to deliver a bounce message always caused it to be frozen, even if
4961 there was an errors_to setting on the router. The errors_to setting is now
4964 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4965 canonical form (fully expanded) before being placed in
4966 $sender_host_address.
4968 36. The table in the code that translates DNS record types into text (T_A to
4969 "A" for instance) was missing entries for NS and CNAME. It is just possible
4970 that this could have caused confusion if both these types were looked up
4971 for the same domain, because the text type is used as part of Exim's
4972 per-process caching. But the chance of anyone hitting this buglet seems
4975 37. The dnsdb lookup has been extended in a number of ways.
4977 (1) There is a new type, "zns", which walks up the domain tree until it
4978 finds some nameserver records. It should be used with care.
4980 (2) There is a new type, "mxh", which is like "mx" except that it returns
4981 just the host names, not the priorities.
4983 (3) It is now possible to give a list of domains (or IP addresses) to be
4984 looked up. The behaviour when one of the lookups defers can be
4985 controlled by a keyword.
4987 (4) It is now possible to specify the separator character for use when
4988 multiple records are returned.
4990 38. The dnslists ACL condition has been extended: it is now possible to supply
4991 a list of IP addresses and/or domains to be looked up in a particular DNS
4994 39. Added log_selector=+queue_time_overall.
4996 40. When running the queue in the test harness, wait just a tad after forking a
4997 delivery process, to get repeatability of debugging output.
4999 41. Include certificate and key file names in error message when GnuTLS fails
5000 to set them up, because the GnuTLS error message doesn't include the name
5001 of the failing file when there is a problem reading it.
5003 42. Allow both -bf and -bF in the same test run.
5005 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5007 44. The "Exiscan patch" is now merged into the mainline Exim source.
5009 45. Sometimes the final signoff response after QUIT could fail to get
5010 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5011 < 0 before doing a fflush(). This bug looks as though it goes back to the
5012 introduction of TLS in release 3.20, but "sometimes" must have been rare
5013 because the tests only now provoked it.
5015 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5016 (this can affect the format of dates).
5018 47. exim_tidydb, when checking for the continued existence of a message for
5019 which it has found a message-specific retry record, was not finding
5020 messages that were in split spool directories. Consequently, it was
5021 deleting retry records that should have stayed in existence.
5023 48. Steve fixed some bugs in eximstats.
5025 49. The SPA authentication driver was not abandoning authentication and moving
5026 on to the next authenticator when an expansion was forced to fail,
5027 contradicting the general specification for all authenticators. Instead it
5028 was generating a temporary error. It now behaves as specified.
5030 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5031 (the order specifies the preference for clients). The order is now AES256,
5032 AES128, 3DES, ARCFOUR128.
5034 51. Small patch to Sieve code - explicitly set From: when generating an
5037 52. Exim crashed if a remote delivery caused a very long error message to be
5038 recorded - for instance if somebody sent an entire SpamAssassin report back
5039 as a large number of 550 error lines. This bug was coincidentally fixed by
5040 increasing the size of one of Exim's internal buffers (big_buffer) that
5041 happened as part of the Exiscan merge. However, to be on the safe side, I
5042 have made the code more robust (and fixed the comments that describe what
5045 53. Now that there can be additional text after "Completed" in log lines (if
5046 the queue_time_overall log selector is set), a one-byte patch to exigrep
5047 was needed to allow it to recognize "Completed" as not the last thing in
5050 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5051 patch that reportedly fixes this has been added. I am not expert enough to
5052 create a test for it. This is what the patch creator wrote:
5054 "I found a little strange behaviour of ldap code when working with
5055 Windows 2003 AD Domain, where users was placed in more than one
5056 Organization Units. When I tried to give exim partial DN, the exit code
5057 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5058 But simultaneously result of request was absolutely normal ldap result,
5059 so I produce this patch..."
5061 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5062 REFERENCE, so I have modified the code to exclude the patch when that macro
5065 55. Some experimental protocols are using DNS PTR records for new purposes. The
5066 keys for these records are domain names, not reversed IP addresses. The
5067 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5068 leaves it alone. Component reversal etc. now happens only for IP addresses.
5071 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5073 57. Double the size of the debug message buffer (to 2048) so that more of very
5074 long debug lines gets shown.
5076 58. The exicyclog utility now does better if the number of log files to keep
5077 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5079 59. Two changes related to the smtp_active_hostname option:
5081 (1) $smtp_active_hostname is now available as a variable.
5082 (2) The default for smtp_banner uses $smtp_active_hostname instead
5083 of $primary_hostname.
5085 60. The host_aton() function is supposed to be passed a string that is known
5086 to be a valid IP address. However, in the case of IPv6 addresses, it was
5087 not checking this. This is a hostage to fortune. Exim now panics and dies
5088 if the condition is not met. A case was found where this could be provoked
5089 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5090 components; fortuitously, this particular loophole had already been fixed
5091 by change 4.50/55 above.
5093 If there are any other similar loopholes, the new check in host_aton()
5094 itself should stop them being exploited. The report I received stated that
5095 data on the command line could provoke the exploit when Exim was running as
5096 exim, but did not say which command line option was involved. All I could
5097 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5098 running as the user.
5101 61. There was a buffer overflow vulnerability in the SPA authentication code
5102 (which came originally from the Samba project). I have added a test to the
5103 spa_base64_to_bits() function which I hope fixes it.
5106 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5107 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5109 63. The daemon start-up calls getloadavg() while still root for those OS that
5110 need the first call to be done as root, but it missed one case: when
5111 deliver_queue_load_max is set with deliver_drop_privilege. This is
5112 necessary for the benefit of the queue runner, because there is no re-exec
5113 when deliver_drop_privilege is set.
5115 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5116 This has been fixed.
5118 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5119 was in use, was not putting the data itself into the right store pool;
5120 consequently, it could be overwritten for a subsequent message in the same
5121 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5124 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5126 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5127 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5128 the function were treating the return as a boolean value, which happened to
5129 work because 0=false and not-0=true, but is not correct code.
5131 68. The host_aton() function was not handling scoped IPv6 addresses (those
5132 with, for example, "%eth0" on the end) correctly.
5134 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5135 negated items (that is, ~something) in unsigned ints. Some compilers
5136 apparently mutter when there is no cast.
5138 70. If an address verification called from an ACL failed, and did not produce a
5139 user-specific message (i.e. there was only a "system" message), nothing was
5140 put in $acl_verify_message. In this situation, it now puts the system
5143 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5144 session; change 4.31/43 added the unwanted input to the log line - except
5145 that it did not do this in the start of session case. It now does.
5147 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5148 This is wrong and can cause the other end to generate a synchronization
5149 error if it is another Exim or anything else that does the synchronization
5150 check. A QUIT command is no longer sent after a timeout.
5152 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5153 during host lookups.
5155 74. The defer_ok option of callout verification was not working if it was used
5156 when verifying addresses in header lines, that is, for this case:
5158 verify = header_sender/callout=defer_ok
5160 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5161 those file descriptors could be used for SMTP connections. If anything
5162 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5163 could be sent to the SMTP client, causing chaos. The daemon now opens
5164 stdin, stdout, and stderr to /dev/null when it puts itself into the
5167 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5168 log by default. The user can override this with suitable Perl magic.
5170 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5171 the log message when discard triggers, was not working for the DATA ACL or
5172 for the non-SMTP ACL.
5174 78. Error message wording change in sieve.c.
5176 79. If smtp_accept_max_per_host was set, the number of connections could be
5177 restricted to fewer than expected, because the daemon was trying to set up
5178 a new connection before checking whether the processes handling previous
5179 connections had finished. The check for completed processes is now done
5180 earlier. On busy systems, this bug wouldn't be noticed because something
5181 else would have woken the daemon, and it would have reaped the completed
5184 80. If a message was submitted locally by a user whose login name contained one
5185 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5186 It caused a spool format error. I have fixed the spool reading code. A
5187 related problem was that the "from" clause in the Received: line became
5188 illegal because of the space(s). It is now covered by ${quote_local_part.
5190 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5193 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5195 83. Patch from Sieve maintainer to fix unterminated string problem in
5196 "vacation" handling.
5198 84. Some minor changes to the Linux configuration files to help with other
5199 OS variants using glibc.
5201 85. One more patch for Sieve to update vacation handling to latest spec.
5204 ----------------------------------------------------
5205 See the note above about the 4.44 and 4.50 releases.
5206 ----------------------------------------------------
5212 1. Change 4.43/35 introduced a bug that caused file counts to be
5213 incorrectly computed when quota_filecount was set in an appendfile
5216 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5217 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5220 3. Give more explanation in the error message when the command for a transport
5221 filter fails to execute.
5223 4. There are several places where Exim runs a non-Exim command in a
5224 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5225 was being done only for the command run by the queryprogram router. It is
5226 now done for all such subprocesses. The other cases are: ${run, transport
5227 filters, and the commands run by the lmtp and pipe transports.
5229 5. Some older OS have a limit of 256 on the maximum number of file
5230 descriptors. Exim was using setrlimit() to set 1000 as a large value
5231 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5232 systems. I've change it so that if it can't get 1000, it tries for 256.
5234 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5235 was an oversight, and furthermore, ever since the addition of extra
5236 controls (e.g. 4.43/32), the checks on when to allow different forms of
5237 "control" were broken. There should now be diagnostics for all cases when a
5238 control that does not make sense is encountered.
5240 7. $recipients is now available in the predata ACL (oversight).
5242 8. Tidy the search cache before the fork to do a delivery from a message
5243 received from the command line. Otherwise the child will trigger a lookup
5244 failure and thereby defer the delivery if it tries to use (for example) a
5245 cached ldap connection that the parent has called unbind on.
5247 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5248 of $address_data from the recipient verification was clobbered by the
5249 sender verification.
5251 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5252 was its contents. (It was OK if the option was not defined at all.)
5254 11. A "Completed" log line is now written for messages that are removed from
5255 the spool by the -Mrm option.
5257 12. $host_address is now set to the target address during the checking of
5258 ignore_target_hosts.
5260 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5261 being passed; this would have caused $sender_host_name to have been used if
5262 matching the list had actually called for a host name (not very likely,
5263 since this list is usually IP addresses). A host name is now passed as
5266 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5267 code that specifies a non-restarting handler (typically sigaction() in
5268 modern systems) in an attempt to fix a rare and obscure crash bug.
5270 15. Narrowed the window for a race in the daemon that could cause it to ignore
5271 SIGCHLD signals. This is not a major problem, because they are used only to
5272 wake it up if nothing else does.
5274 16. A malformed maildirsize file could cause Exim to calculate negative values
5275 for the mailbox size or file count. Odd effects could occur as a result.
5276 The maildirsize information is now recalculated if the size or filecount
5279 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5280 support for a long time. Removed HAVE_SYS_VFS_H.
5282 18. Updated exipick to current release from John Jetmore.
5284 19. Allow an empty sender to be matched against a lookup in an address list.
5285 Previously the only cases considered were a regular expression, or an
5288 20. Exim went into a mad DNS lookup loop when doing a callout where the
5289 host was specified on the transport, if the DNS lookup yielded more than
5292 21. The RFC2047 encoding function was originally intended for short strings
5293 such as real names; it was not keeping to the 75-character limit for
5294 encoded words that the RFC imposes. It now respects the limit, and
5295 generates multiple encoded words if necessary. To be on the safe side, I
5296 have increased the buffer size for the ${rfc2047: expansion operator from
5299 22. Failure to deliver a bounce message always caused it to be frozen, even if
5300 there was an errors_to setting on the router. The errors_to setting is now
5303 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5304 canonical form (fully expanded) before being placed in
5305 $sender_host_address.
5307 24. Updated eximstats to version 1.33
5309 25. Include certificate and key file names in error message when GnuTLS fails
5310 to set them up, because the GnuTLS error message doesn't include the name
5311 of the failing file when there is a problem reading it.
5313 26. Expand error message when OpenSSL has problems setting up cert/key files.
5316 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5317 (this can affect the format of dates).
5319 28. exim_tidydb, when checking for the continued existence of a message for
5320 which it has found a message-specific retry record, was not finding
5321 messages that were in split spool directories. Consequently, it was
5322 deleting retry records that should have stayed in existence.
5324 29. eximstats updated to version 1.35
5325 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5326 1.35 - bugfix such that pie charts by volume are generated correctly
5328 30. The SPA authentication driver was not abandoning authentication and moving
5329 on to the next authenticator when an expansion was forced to fail,
5330 contradicting the general specification for all authenticators. Instead it
5331 was generating a temporary error. It now behaves as specified.
5333 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5334 (the order specifies the preference for clients). The order is now AES256,
5335 AES128, 3DES, ARCFOUR128.
5337 31. Small patch to Sieve code - explicitly set From: when generating an
5340 32. Exim crashed if a remote delivery caused a very long error message to be
5341 recorded - for instance if somebody sent an entire SpamAssassin report back
5342 as a large number of 550 error lines. This bug was coincidentally fixed by
5343 increasing the size of one of Exim's internal buffers (big_buffer) that
5344 happened as part of the Exiscan merge. However, to be on the safe side, I
5345 have made the code more robust (and fixed the comments that describe what
5348 33. Some experimental protocols are using DNS PTR records for new purposes. The
5349 keys for these records are domain names, not reversed IP addresses. The
5350 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5351 leaves it alone. Component reversal etc. now happens only for IP addresses.
5354 34. The host_aton() function is supposed to be passed a string that is known
5355 to be a valid IP address. However, in the case of IPv6 addresses, it was
5356 not checking this. This is a hostage to fortune. Exim now panics and dies
5357 if the condition is not met. A case was found where this could be provoked
5358 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5359 components; fortuitously, this particular loophole had already been fixed
5360 by change 4.50/55 or 4.44/33 above.
5362 If there are any other similar loopholes, the new check in host_aton()
5363 itself should stop them being exploited. The report I received stated that
5364 data on the command line could provoke the exploit when Exim was running as
5365 exim, but did not say which command line option was involved. All I could
5366 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5367 running as the user.
5370 35. There was a buffer overflow vulnerability in the SPA authentication code
5371 (which came originally from the Samba project). I have added a test to the
5372 spa_base64_to_bits() function which I hope fixes it.
5375 36. The daemon start-up calls getloadavg() while still root for those OS that
5376 need the first call to be done as root, but it missed one case: when
5377 deliver_queue_load_max is set with deliver_drop_privilege. This is
5378 necessary for the benefit of the queue runner, because there is no re-exec
5379 when deliver_drop_privilege is set.
5381 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5382 was in use, was not putting the data itself into the right store pool;
5383 consequently, it could be overwritten for a subsequent message in the same
5384 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5387 38. Sometimes the final signoff response after QUIT could fail to get
5388 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5389 < 0 before doing a fflush(). This bug looks as though it goes back to the
5390 introduction of TLS in release 3.20, but "sometimes" must have been rare
5391 because the tests only now provoked it.
5397 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5398 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5399 Now it returns an integer. A number of calls were still expecting a T/F
5400 return. Fortuitously, in all cases, the tests worked in OK situations,
5401 which is the norm. However, things would have gone wrong on any write
5402 failures on the smtp file descriptor. This function is used when sending
5403 messages over SMTP and also when doing verify callouts.
5405 2. When Exim is called to do synchronous delivery of a locally submitted
5406 message (the -odf or -odi options), it no longer closes stderr before doing
5409 3. Implemented the mua_wrapper option.
5411 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5413 5. Implemented the functions header_remove(), header_testname(),
5414 header_add_at_position(), and receive_remove_recipient(), and exported them
5417 6. If an ACL "warn" statement specified the addition of headers, Exim already
5418 inserted X-ACL-Warn: at the start if there was no header name. However, it
5419 was not making this test for the second and subsequent header lines if
5420 there were newlines in the string. This meant that an invalid header could
5421 be inserted if Exim was badly configured.
5423 7. Allow an ACL "warn" statement to add header lines at the start or after all
5424 the Received: headers, as well as at the end.
5426 8. Added the rcpt_4xx retry error code.
5428 9. Added postmaster_mailfrom=xxx to callout verification option.
5430 10. Added mailfrom=xxxx to the callout verification option, for verify=
5433 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5434 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5436 12. Inserted some casts to stop certain compilers warning when using pointer
5437 differences as field lengths or precisions in printf-type calls (mostly
5438 affecting debugging statements).
5440 13. Added optional readline() support for -be (dynamically loaded).
5442 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5443 same clock tick as a message's arrival, so that its received time was the
5444 same as the "first fail" time on the retry record, and that message
5445 remained on the queue past the ultimate address timeout, every queue runner
5446 would try a delivery (because it was past the ultimate address timeout) but
5447 after another failure, the ultimate address timeout, which should have then
5448 bounced the address, did not kick in. This was a "< instead of <=" error;
5449 in most cases the first failure would have been in the next clock tick
5450 after the received time, and all would be well.
5452 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5453 being recognized when the domain list was tested by the match_domain
5454 condition in an expansion string.
5456 16. Added the ${str2b64: operator.
5458 17. Exim was always calling setrlimit() to set a large limit for the number of
5459 processes, without checking whether the existing limit was already
5460 adequate. (It did check for the limit on file descriptors.) Furthermore,
5461 errors from getrlimit() and setrlimit() were being ignored. Now they are
5462 logged to the main and panic logs, but Exim does carry on, to try to do its
5463 job under whatever limits there are.
5465 18. Imported PCRE 5.0.
5467 19. Trivial typo in log message " temporarily refused connection" (the leading
5470 20. If the log selector return_path_on_delivery was set and an address was
5471 redirected to /dev/null, the delivery process crashed because it assumed
5472 that a return path would always be set for a "successful" delivery. In this
5473 case, the whole delivery is bypassed as an optimization, and therefore no
5476 21. Internal re-arrangement: the function for sending a challenge and reading
5477 a response while authentication was assuming a zero-terminated challenge
5478 string. It's now changed to take a pointer and a length, to allow for
5479 binary data in such strings.
5481 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5483 23. Exim was not respecting finduser_retries when seeking the login of the
5484 uid under which it was called; it was always trying 10 times. (The default
5485 setting of finduser_retries is zero.) Also, it was sleeping after the final
5486 failure, which is pointless.
5488 24. Implemented tls_on_connect_ports.
5490 25. Implemented acl_smtp_predata.
5492 26. If the domain in control=submission is set empty, Exim assumes that the
5493 authenticated id is a complete email address when it generates From: or
5494 Sender: header lines.
5496 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5497 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5498 chown and chgrp in /bin and hostname in /usr/bin.
5500 28. Exim was keeping the "process log" file open after each use, just as it
5501 does for the main log. This opens the possibility of it remaining open for
5502 long periods when the USR1 signal hits a daemon. Occasional processlog
5503 errors were reported, that could have been caused by this. Anyway, it seems
5504 much more sensible not to leave this file open at all, so that is what now
5507 29. The long-running daemon process does not normally write to the log once it
5508 has entered its main loop, and it closes the log before doing so. This is
5509 so that log files can straightforwardly be renamed and moved. However,
5510 there are a couple of unusual error situations where the daemon does write
5511 log entries, and I had neglected to close the log afterwards.
5513 30. The text of an SMTP error response that was received during a remote
5514 delivery was being truncated at 512 bytes. This is too short for some of
5515 the long messages that one sometimes sees. I've increased the limit to
5518 31. It is now possible to make retry rules that apply only when a message has a
5519 specific sender, in particular, an empty sender.
5521 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5522 it possible to be selective about when SMTP synchronization is enforced.
5524 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5526 32. Implemented hosts_connection_nolog.
5528 33. Added an ACL for QUIT.
5530 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5533 35. Added mailbox_size and mailbox_filecount to appendfile.
5535 36. Added control = no_multiline_responses to ACLs.
5537 37. There was a bug in the logic of the code that waits for the clock to tick
5538 in the case where the clock went backwards by a substantial amount such
5539 that the microsecond fraction of "now" was more than the microsecond
5540 fraction of "then" (but the whole seconds number was less).
5542 38. Added support for the libradius Radius client library this is found on
5543 FreeBSD (previously only the radiusclient library was supported).
5549 1. When certain lookups returned multiple values in the form name=value, the
5550 quoting of the values was not always being done properly. Specifically:
5551 (a) If the value started with a double quote, but contained no whitespace,
5553 (b) If the value contained whitespace other than a space character (i.e.
5554 tabs or newlines or carriage returns) it was not quoted.
5555 This fix has been applied to the mysql and pgsql lookups by writing a
5556 separate quoting function and calling it from the lookup code. The fix
5557 should probably also be applied to nisplus, ibase and oracle lookups, but
5558 since I cannot test any of those, I have not disturbed their existing code.
5560 2. A hit in the callout cache for a specific address caused a log line with no
5561 reason for rejecting RCPT. Now it says "Previous (cached) callout
5562 verification failure".
5564 3. There was an off-by-one bug in the queryprogram router. An over-long
5565 return line was truncated at 256 instead of 255 characters, thereby
5566 overflowing its buffer with the terminating zero. As well as fixing this, I
5567 have increased the buffer size to 1024 (and made a note to document this).
5569 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5570 when Exim is waiting for an SMTP response from a remote server, Exim
5571 restarts its select() call on the socket, thereby resetting its timeout.
5572 This is not a problem when such interrupts are rare. Somebody set up a cron
5573 job to run exiwhat every 2 minutes, which is less than the normal select()
5574 timeout (5 or 10 minutes). This meant that the select() timeout never
5575 kicked in because it was always reset. I have fixed this by comparing the
5576 time when an interrupt arrives with the time at the start of the first call
5577 to select(). If more time than the timeout has elapsed, the interrupt is
5578 treated as a timeout.
5580 5. Some internal re-factoring in preparation for the addition of Sieve
5581 extensions (by MH). In particular, the "personal" test is moved to a
5582 separate function, and given an option for scanning Cc: and Bcc: (which is
5583 not set for Exim filters).
5585 6. When Exim created an email address using the login of the caller as the
5586 local part (e.g. when creating a From: or Sender: header line), it was not
5587 quoting the local part when it contained special characters such as @.
5589 7. Installed new OpenBSD configuration files.
5591 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5592 try to make them clearer.
5594 9. Callout options, other than the timeout value, were being ignored when
5595 verifying sender addresses in header lines. For example, when using
5597 verify = header_sender/callout=no_cache
5599 the cache was (incorrectly) being used.
5601 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5602 only the Cygwin environment.
5604 11. When return_path_on_delivery was set as a log selector, if different remote
5605 addresses in the same message used different return paths and parallel
5606 remote delivery occurred, the wrong values would sometimes be logged.
5607 (Whenever a remote delivery process finished, the return path value from
5608 the most recently started remote delivery process was logged.)
5610 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5611 lines when AUTH and/or TLS are in use. This is the "received protocol"
5612 field. Exim used to use "asmtp" for authenticated SMTP, without any
5613 indication (in the protocol name) for TLS use. Now it follows the RFC and
5614 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5615 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5616 names appear in log lines as well as in Received: header lines.
5618 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5619 extensions, and comparison tests, and to fix some bugs.
5621 14. Changes to the "personal" filter test:
5623 (1) The test was buggy in that it was just doing the equivalent of
5624 "contains" tests on header lines. For example, if a user's address was
5625 anne@some.where, the "personal" test would incorrectly be true for
5627 To: susanne@some.where
5629 This test is now done by extracting each address from the header in turn,
5630 and checking the entire address. Other tests that are part of "personal"
5631 are now done using regular expressions (for example, to check local parts
5632 of addresses in From: header lines).
5634 (2) The list of non-personal local parts in From: addresses has been
5635 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5636 taken from the Sieve specification recommendations.
5638 (3) If the message contains any header line starting with "List-" it is
5639 treated as non-personal.
5641 (4) The test for "circular" in the Subject: header line has been removed
5642 because it now seems ill-conceived.
5644 15. Minor typos in src/EDITME comments corrected.
5646 16. Installed latest exipick from John Jetmore.
5648 17. If headers_add on a router specified a text string that was too long for
5649 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5650 of string_sprintf() is now avoided.
5652 18. $message_body_size was not set (it was always zero) when running the DATA
5653 ACL and the local_scan() function.
5655 19. For the "mail" command in an Exim filter, no default was being set for
5656 the once_repeat time, causing a random time value to be used if "once" was
5657 specified. (If the value happened to be <= 0, no repeat happened.) The
5658 default is now 0s, meaning "never repeat". The "vacation" command was OK
5659 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5660 (I found it when inspecting the code).
5662 20. There is now an overall timeout for performing a callout verification. It
5663 defaults to 4 times the callout timeout, which applies to individual SMTP
5664 commands during the callout. The overall timeout applies when there is more
5665 than one host that can be tried. The timeout is checked before trying the
5666 next host. This prevents very long delays if there are a large number of
5667 hosts and all are timing out (e.g. when the network connections are timing
5668 out). The value of the overall timeout can be changed by specifying an
5669 additional sub-option for "callout", called "maxwait". For example:
5671 verify = sender/callout=5s,maxwait=20s
5673 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5674 to the end before writing, but this should make it even safer).
5676 22. Exim was forgetting that it had advertised PIPELINING for the second and
5677 subsequent messages on an SMTP connection. It was also not resetting its
5678 memory on STARTTLS and an internal HELO.
5680 23. When Exim logs an SMTP synchronization error within a session, it now
5681 records whether PIPELINING has been advertised or not.
5683 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5684 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5685 rather than long int.
5687 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5689 26. Added the never_mail option to autoreply.
5695 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5696 crash if the getsockname() call failed; this can happen if a connection is
5697 closed very soon after it is established. The problem was simply in the
5698 order in which certain operations were done, causing Exim to try to write
5699 to the SMTP stream before it had set up the file descriptor. The bug has
5700 been fixed by making things happen in the correct order.
5706 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5707 before the connection was closed, thus losing the rejection response.
5709 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5710 some early Solaris releases, but causes trouble in current releases where
5711 socklen_t is defined.
5713 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5716 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5719 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5720 that releasing the top of it at the end releases what was used for sub-
5721 expansions (unless the block got too big). However, discard this block if
5722 the first thing is a variable or header, so that we can use its block when
5723 it is dynamic (useful for very large $message_headers, for example).
5725 6. Lookups now cache *every* query, not just the most recent. A new, separate
5726 store pool is used for this. It can be recovered when all lookup caches are
5727 flushed. Lookups now release memory at the end of their result strings.
5728 This has involved some general refactoring of the lookup sources.
5730 7. Some code has been added to the store_xxx() functions to reduce the amount
5731 of flapping under certain conditions.
5733 8. log_incoming_interface used to affect only the <= reception log lines. Now
5734 it causes the local interface and port to be added to several more SMTP log
5735 lines, for example "SMTP connection from", and rejection lines.
5737 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5739 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5741 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5742 could be overwritten at the end of the current message (or the start of a
5743 new message if it was set in a HELO ACL). The value is now preserved for
5744 the duration of the SMTP connection.
5746 12. If a transport had a headers_rewrite setting, and a matching header line
5747 contained an unqualified address, that address was qualified, even if it
5748 did not match any rewriting rules. The underlying bug was that the values
5749 of the flags that permit the existence of unqualified sender and recipient
5750 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5751 non-local messages, and by -bnq for local messages) were not being
5752 preserved with the message after it was received.
5754 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5755 "next input=" as part of the text comprising the host identity instead of
5756 the correct text. The code was using the same buffer for two different
5757 strings. However, depending on which order the printing function evaluated
5758 its arguments, the bug did not always show up. Under Linux, for example, my
5759 test suite worked just fine.
5761 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5762 doesn't work with some older versions of Perl. It has been changed to "my",
5763 which in any case is probably the better facility to use.
5765 15. A really picky compiler found some instances of statements for creating
5766 error messages that either had too many or two few arguments for the format
5769 16. The size of the buffer for calls to the DNS resolver has been increased
5770 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5771 for addresses that have a lot of PTR records. This alleviates a problem; it
5772 does not fully solve it.
5774 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5775 buffer now truncates the list and logs the incident, which is the same
5776 action as happens when Exim is looking up a host name and its aliases.
5777 Previously in this situation something unpredictable would happen;
5778 sometimes it was "internal error: store_reset failed".
5780 18. If a server dropped the connection unexpectedly when an Exim client was
5781 using GnuTLS and trying to read a response, the client delivery process
5782 crashed while trying to generate an error log message.
5784 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5785 string, for example:
5787 warn message = H1: something\nH2: something
5789 the text was added as a single header line from Exim's point of view
5790 though it ended up OK in the delivered message. However, searching for the
5791 second and subsequent header lines using $h_h2: did not work. This has been
5792 fixed. Similarly, if a system filter added multiple headers in this way,
5793 the routers could not see them.
5795 20. Expanded the error message when iplsearch is called with an invalid key to
5796 suggest using net-iplsearch in a host list.
5798 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5799 ACLs are no longer actually imposed (and a message to that effect is
5802 22. If a "gecos" field in a passwd entry contained escaped characters, in
5803 particular, if it contained a \" sequence, Exim got it wrong when building
5804 a From: or a Sender: header from that name. A second bug also caused
5805 incorrect handling when an unquoted " was present following a character
5806 that needed quoting.
5808 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5809 was not being matched caselessly.
5811 24. Arranged for all hyphens in the exim.8 source to be escaped with
5814 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5815 properly. Recipient callout cache records were still being keyed to include
5816 the sender, even when use_sender was set false. This led to far more
5817 callouts that were necessary. The sender is no longer included in the key
5818 when use_sender is false.
5820 26. Added "control = submission" modifier to ACLs.
5822 27. Added the ${base62d: operator to decode base 62 numbers.
5824 28. dnsdb lookups can now access SRV records.
5826 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5827 the configuration file.
5829 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5830 (-v) mode. This makes the output for a verbose queue run more intelligible.
5832 31. Added a use_postmaster feature to recipient callouts.
5834 32. Added the $body_zerocount variable, containing the number of binary zero
5835 bytes in the message body.
5837 33. The time of last modification of the "new" subdirectory is now used as the
5838 "mailbox time last read" when there is a quota error for a maildir
5841 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5843 35. Added +ignore_unknown as a special item in host lists.
5845 36. Code for decoding IPv6 addresses in host lists is now included, even if
5846 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5847 address was recognized as an IP address, but was then not correctly decoded
5848 into binary, causing unexpected and incorrect effects when compared with
5855 1. Very minor rewording of debugging text in manualroute to say "list of
5856 hosts" instead of "hostlist".
5858 2. If verify=header_syntax was set, and a header line with an unqualified
5859 address (no domain) and a large number of spaces between the end of the
5860 name and the colon was received, the reception process suffered a buffer
5861 overflow, and (when I tested it) crashed. This was caused by some obsolete
5862 code that should have been removed. The fix is to remove it!
5864 3. When running in the test harness, delay a bit after writing a bounce
5865 message to get a bit more predictability in the log output.
5867 4. Added a call to search_tidyup() just before forking a reception process. In
5868 theory, someone could use a lookup in the expansion of smtp_accept_max_
5869 per_host which, without the tidyup, could leave open a database connection.
5871 5. Added the variables $recipient_data and $sender_data which get set from a
5872 lookup success in an ACL "recipients" or "senders" condition, or a router
5873 "senders" option, similar to $domain_data and $local_part_data.
5875 6. Moved the writing of debug_print from before to after the "senders" test
5878 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5879 problems for message scanning, either using a data ACL, or using
5880 local_scan() because the Received: header was not generated till after they
5881 were called (in order to set the time as the time of reception completion).
5882 I have revised the way this works. The header is now generated after the
5883 body is received, but before the ACL or local_scan() are called. After they
5884 are run, the timestamp in the header is updated.
5890 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5891 before starting a queue runner without re-exec. This happened only when
5892 deliver_drop_privilege was set or when the Exim user was set to root. The
5893 effect of the bug was that timeouts during subsequent deliveries caused
5894 crashes instead of being properly handled. The handler is now left at its
5895 default (and expected) setting.
5897 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5898 message, again when deliver_drop_privilege is set or Exim is run as root.
5899 The bug described in (1) was not present in this case, but the tidying up
5900 of the other signals was missing. I have made the two cases consistent.
5902 3. The ignore_target_hosts setting on a manualroute router was being ignored
5903 for hosts that were looked up using the /MX notation.
5905 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5908 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5909 operated on the sender address. After changing the $sender_address to <>
5910 for the sender address verify, Exim was re-instated it as the original
5911 (before rewriting) address, but remembering that it had rewritten it, so it
5912 wasn't rewriting it again. This bug also had the effect of breaking the
5913 sender address verification caching when the sender address was rewritten.
5915 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5916 This has been changed so that if the ip literal address matches
5917 ignore_target_hosts, the router declines.
5919 7. Added expansion conditions match_domain, match_address, and match_local_
5920 part (NOT match_host).
5922 8. The placeholder for the Received: header didn't have a length field set.
5924 9. Added code to Exim itself and to exim_lock to test for a specific race
5925 condition that could lead to file corruption when using MBX delivery. The
5926 issue is with the lockfile that is created in /tmp. If this file is removed
5927 after a process has opened it but before that process has acquired a lock,
5928 there is the potential for a second process to recreate the file and also
5929 acquire a lock. This could lead to two Exim processes writing to the file
5930 at the same time. The added code performs the same test as UW imapd; it
5931 checks after acquiring the lock that its file descriptor still refers to
5932 the same named file.
5934 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5935 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5938 11. Added the smtp_active_hostname option. If used, this will typically be made
5939 to depend on the incoming interface address. Because $interface_address is
5940 not set up until the daemon has forked a reception process, error responses
5941 that can happen earlier (such as "too many connections") no longer contain
5944 12. If an expansion in a condition on a "warn" statement fails because a lookup
5945 defers, the "warn" statement is abandoned, and the next ACL statement is
5946 processed. Previously this caused the whole ACL to be aborted.
5948 13. Added the iplsearch lookup type.
5950 14. Added ident_timeout as a log selector.
5952 15. Added tls_certificate_verified as a log selector.
5954 16. Added a global option tls_require_ciphers (compare the smtp transport
5955 option of the same name). This controls incoming TLS connections.
5957 17. I finally figured out how to make tls_require_ciphers do a similar thing
5958 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5959 before starting the TLS session.
5961 18. Tabs are now shown as \t in -bP output.
5963 19. If the log selector return_path_on_delivery was set, Exim crashed when
5964 bouncing a message because it had too many Received: header lines.
5966 20. If two routers both had headers_remove settings, and the first one included
5967 a superfluous trailing colon, the final name in the first list and the
5968 first name in the second list were incorrectly joined into one item (with a
5969 colon in the middle).
5975 1. Added -C and -D options to the exinext utility, mainly to make it easier
5976 to include in the automated testing, but these could be helpful when
5977 multiple configurations are in use.
5979 2. The exinext utility was not formatting the output nicely when there was
5980 an alternate port involved in the retry record key, nor when there was a
5981 message id as well (for retries that were specific to a specific message
5982 and a specific host). It was also confused by IPv6 addresses, because of
5983 the additional colons they contain. I have fixed the IPv4 problem, and
5984 patched it up to do a reasonable job for IPv6.
5986 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5987 delivery, the log line now contains "pipelined" if PIPELINING was used.
5989 4. An SMTP transport process used to panic and die if the bind() call to set
5990 an explicit outgoing interface failed. This has been changed; it is now
5991 treated in the same way as a connect() failure.
5993 5. A reference to $sender_host_name in the part of a conditional expansion
5994 that was being skipped was still causing a DNS lookup. This no longer
5997 6. The def: expansion condition was not recognizing references to header lines
5998 that used bh_ and bheader_.
6000 7. Added the _cache feature to named lists.
6002 8. The code for checking quota_filecount in the appendfile transport was
6003 allowing one more file than it should have been.
6005 9. For compatibility with Sendmail, the command line option
6013 and sets the incoming protocol and host name (for trusted callers). The
6014 host name and its colon can be omitted when only the protocol is to be set.
6015 Note the Exim already has two private options, -pd and -ps, that refer to
6016 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6017 "s", but I don't think that's a major issue.
6019 10. A number of refactoring changes to the code, none of which should affect
6022 (a) The number of logging options was getting close to filling up the
6023 32-bit word that was used as a bit map. I have split them into two classes:
6024 those that are passed in the argument to log_write(), and those that are
6025 only ever tested independently outside of that function. These are now in
6026 separate 32-bit words, so there is plenty of room for expansion again.
6027 There is no change in the user interface or the logging behaviour.
6029 (b) When building, for example, log lines, the code previously used a
6030 macro that called string_cat() twice, in order to add two strings. This is
6031 not really sufficiently general. Furthermore, there was one instance where
6032 it was actually wrong because one of the argument was used twice, and in
6033 one call a function was used. (As it happened, calling the function twice
6034 did not affect the overall behaviour.) The macro has been replaced by a
6035 function that can join an arbitrary number of extra strings onto a growing
6038 (c) The code for expansion conditions now uses a table and a binary chop
6039 instead of a serial search (which was left over from when there were very
6040 few conditions). Also, it now recognizes conditions like "pam" even when
6041 the relevant support is not compiled in: a suitably worded error message is
6042 given if an attempt is made to use such a condition.
6044 11. Added ${time_interval:xxxxx}.
6046 12. A bug was causing one of the ddress fields not to be passed back correctly
6047 from remote delivery subprocesses. The field in question was not being
6048 subsequently used, so this caused to problems in practice.
6050 13. Added new log selectors queue_time and deliver_time.
6052 14. Might have fixed a bug in maildirsizefile handling that threw up
6053 "unexpected character" debug warnings, and recalculated the data
6054 unnecessarily. In any case, I expanded the warning message to give more
6057 15. Added the message "Restricted characters in address" to the statements in
6058 the default ACL that block characters like @ and % in local parts.
6060 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6061 Three changes have been made:
6063 (a) There was a serious bug; a negative response to MAIL caused the whole
6064 recipient domain to be cached as invalid, thereby blocking all messages
6065 to all local parts at the same domain, from all senders. This bug has
6066 been fixed. The domain is no longer cached after a negative response to
6067 MAIL if the sender used is not empty.
6069 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6072 (c) A new callout option, "use_sender" has been added for people who want
6073 the modified behaviour.
6079 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6082 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6083 indeed breaks things for older releases.
6085 3. Added additional logging to the case where there is a problem reading data
6086 from a filter that is running in a subprocess using a pipe, in order to
6087 try to track down a specific problem.
6089 4. Testing facility fudge: when running in the test harness and attempting
6090 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6091 getting "No route to host". Convert this to a timeout.
6093 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6096 6. Some OS don't have socklen_t but use size_t instead. This affects the
6097 fifth argument of getsockopt() amongst other things. This is now
6098 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6099 can be set for individual OS. I have set it for SunOS5, OSF1, and
6100 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6101 some earlier ones do not.
6103 7. Change 4.30/15 was not doing the test caselessly.
6105 8. The standard form for an IPv6 address literal was being rejected by address
6106 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6107 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6108 this, as well as the form without the "IPv6" on the front (but only when
6109 address literals are enabled, of course).
6111 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6113 10. Exim crashed if a message with an empty sender address specified by -f
6114 encountered a router with an errors_to setting. This could be provoked only
6115 by a command such as
6119 where an empty string was supplied; "<>" did not hit this bug.
6121 11. Installed PCRE release 4.5.
6123 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6124 remained set. It is now erased.
6126 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6127 times from message ids (which are base 36 rather than the normal 62).
6129 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6130 were being counted as actual protocol errors, and logged if the log
6131 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6132 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6133 and DATA following a set of rejected RCPTs do not count as protocol errors.
6134 In other words, Exim assumes they were pipelined, though this may not
6135 actually be the case. Of course, in all cases the client gets an
6136 appropriate error code.
6138 15. If a lookup fails in an ACL condition, a message about the failure may
6139 be available; it is used if testing the ACL cannot continue, because most
6140 such messages specify what the cause of the deferral is. However, some
6141 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6142 that caused an old message to be retained and used if a later statement
6143 caused a defer, replacing the real cause of the deferral.
6145 16. If an IP address had so many PTR records that the DNS lookup buffer
6146 was not large enough to hold them, Exim could crash while trying to process
6147 the truncated data. It now detects and logs this case.
6149 17. Further to 4.21/58, another change has been made: if (and only if) the
6150 first line of a message (the first header line) ends with CRLF, a bare LF
6151 in a subsequent header line has a space inserted after it, so as not to
6152 terminate the header.
6154 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6155 unnecessarily, used atoi() instead of strtol(), and didn't check the
6156 termination when getting file sizes from file names by regex.
6158 19. Completely re-implemented the support for maildirsize files, in the light
6159 of a number of problems with the previous contributed implementation
6160 (4.30/29). In particular:
6162 . If the quota is zero, the maildirsize file is maintained, but no quota is
6165 . If the maildir directory does not exist, it is created before any attempt
6166 to write a maildirsize file.
6168 . The quota value in the file is just a cache; if the quota is changed in
6169 the transport, the new value overrides.
6171 . A regular expression is available for excluding directories from the
6174 20. The autoreply transport checks the characters in options that define the
6175 message's headers; it allows continued headers, but it was checking with
6176 isspace() after an embedded newline instead of explicitly looking for a
6179 21. If all the "regular" hosts to which an address was routed had passed their
6180 expiry times, and had not reached their retry times, the address was
6181 bounced, even if fallback hosts were defined. Now Exim should go on to try
6184 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6185 equivalent code in the SMTP transport. Some hosts send humungous responses
6186 to HELO/EHLO, more than 1024 it seems.
6188 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6189 gives compiler warnings in some environments. I've now done it "properly",
6192 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6193 (because of problems with the built-in one) was declared to return uschar *
6194 instead of char *, causing compiler failure.
6196 25. Fixed a file descriptor leak when processing alias/forward files.
6198 26. Fixed a minor format string issue in dbfn.c.
6200 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6202 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6203 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6206 29. When a sender address is verified, it is cached, to save repeating the test
6207 when there is more than one recipient in a message. However, when the
6208 verification involves a callout, it is possible for different callout
6209 options to be set for different recipients. It is too complicated to keep
6210 track of this in the cache, so now Exim always runs a verification when a
6211 callout is required, relying on the callout cache for the optimization.
6212 The overhead is duplication of the address routing, but this should not be
6215 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6216 to be verified with callout=postmaster, and the main callout worked but the
6217 postmaster check failed, the verification correctly failed. However, if a
6218 subsequent RCPT command asked for sender verification *without* the
6219 postmaster check, incorrect caching caused this verification also to fail,
6222 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6223 it was not caching the DNS options (qualify_single, search_parents) that
6224 were used when the lookup failed. A subsequent lookup with different
6225 options therefore always gave the same answer, though there were cases
6226 where it should not have. (Example: a "domains = !$mx_any" option on a
6227 dnslookup router: the "domains" option is always processed without any
6228 widening, but the router might have qualify_single set.) Now Exim uses the
6229 cached value only when the same options are set.
6231 32. Added John Jetmore's "exipick" utility to the distribution.
6233 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6234 than a timeout (e.g. a certificate is required, and is not provided), an
6235 Exim server now closes the connection immediately. Previously it waited for
6236 the client to close - but if the client is SSL, it seems that they each
6237 wait for each other, leading to a delay before one of them times out.
6239 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6240 maintained 0.8.x compatibility because I don't think many are using it, and
6241 it is clearly obsolete.
6243 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6246 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6247 client certificate was expired. A simple patch fixes this, though I don't
6248 understand the full logic of why the verify callback is called multiple
6251 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6252 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6253 which causes problems with some clients (such as the Certicom SSL Plus
6254 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6255 disables the coutermeasure allowing Eudora to connect."
6257 38. Exim was not checking that a write() to a log file succeeded. This could
6258 lead to Bad Things if a log got too big, in particular if it hit a file
6259 size limit. Exim now panics and dies if it cannot write to a log file, just
6260 as it does if it cannot open a log file.
6262 39. Modified OS/Makefile-Linux so that it now contains
6264 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6266 The two -D definitions ensure that Exim is compiled with large file
6267 support, which makes it possible to handle log files that are bigger than
6270 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6271 instance) a domain was checked against a named list that involved a lookup,
6272 causing $domain_data to be set, then another domain was checked against the
6273 same list, then the first domain was re-checked, the value of $domain_data
6274 after the final check could be wrong. In particular, if the second check
6275 failed, it could be set empty. This bug probably also applied to
6278 41. The strip_trailing_dot option was not being applied to the address given
6279 with the -f command-line option.
6281 42. The code for reading a message's header from the spool was incrementing
6282 $received_count, but never initializing it. This meant that the value was
6283 incorrect (doubled) while delivering a message in the same process in which
6284 it was received. In the most common configuration of Exim, this never
6285 happens - a fresh exec is done - but it can happen when
6286 deliver_drop_privilege is set.
6288 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6289 it now includes up to 150 characters of the unexpected data in the log
6292 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6293 and building data strings. The size of both of these buffers was 10 000
6294 bytes - far larger than anybody would *ever* want, thought I. Needless to
6295 say, somebody hit the limit. I have increased the maximum line length to
6296 20 000 and the maximum data length of concatenated lines to 100 000. I have
6297 also fixed two bugs, because there was no checking on these buffers. Tsk,
6298 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6299 buffer is too small.
6301 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6302 lsearch lookups. Now it does.
6304 46. When parsing a route_list item in a manualroute router, a fixed-length
6305 buffer was used for the list of hosts. I made this 1024 bytes long,
6306 thinking that nobody would ever have a list of hosts that long. Wrong.
6307 Somebody had a whole pile of complicated expansion conditions, and the
6308 string was silently truncated, leading to an expansion error. It turns out
6309 that it is easier to change to an unlimited length (owing to other changes
6310 that have happened since this code was originally written) than to build
6311 structure for giving a limitation error. The length of the item that
6312 expands into the list of hosts is now unlimited.
6314 47. The lsearch lookup could not handle data where the length of text line was
6315 more than 4095 characters. Such lines were truncated, leading to shortened
6316 data being returned. It should now handle lines of any length.
6318 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6319 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6322 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6323 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6324 no longer happens in comment lines. A list of replacements is now placed
6325 at the head of all of the source files, except those whose only change is
6326 to replace PERL_COMMAND in the very first #! line.
6328 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6329 messages on the queue, with a bottom-up merge sort, using code contributed
6330 by Michael Haardt. This should make operations like -bp somewhat faster on
6331 large queues. It won't affect queue runners, except when queue_run_in_order
6334 51. Installed eximstats 1.31 in the distribution.
6336 52. Added support for SRV lookups to the dnslookup router.
6338 53. If an ACL referred to $message_body or $message_body_end, the value was not
6339 reset for any messages that followed in the same SMTP session.
6341 54. The store-handling optimization for building very long strings was not
6342 differentiating between the different store pools. I don't think this
6343 actually made any difference in practice, but I've tidied it.
6345 55. While running the routers to verify a sender address, $sender_address
6346 was still set to the sender address. This is wrong, because when routing to
6347 send a bounce to the sender, it would be empty. Therefore, I have changed
6348 it so that, while verifying a sender address, $sender_address is set to <>.
6349 (There is no change to what happens when verifying a recipient address.)
6351 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6352 target A or AAAA records (if not already returned) without resetting the
6353 qualify_single or search_parents options of the DNS resolver. These are
6354 inappropriate in this case because the targets of MX and SRV records must
6355 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6356 target that, when qualified, matched something in the local domain. These
6357 two options are now turned off when doing these lookups.
6359 57. It seems that at least some releases of Reiserfs (which does not have the
6360 concept of a fixed number of inodes) returns zero and not -1 for the
6361 number of available inodes. This interacted badly with check_spool_inodes,
6362 which assumed that -1 was the "no such thing" setting. What I have done is
6363 to check that the total number of inodes is greater than zero before doing
6364 the test of how many are available.
6366 58. When a "warn" ACL statement has a log_message modifier, the message is
6367 remembered, and not repeated. This is to avoid a lot of repetition when a
6368 message has many recipients that cause the same warning to be written.
6369 However, Exim was preserving the list of already written lines for an
6370 entire SMTP session, which doesn't seem right. The memory is now reset if a
6371 new message is started.
6373 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6374 debugging output unless log_rewrite was also set.
6376 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6377 of (int)(handle) when we know that handle contains (void *)(-1).
6379 61. The Exim daemon panic-logs an error return when it closes the incoming
6380 connection. However "connection reset by peer" seems to be common, and
6381 isn't really an error worthy of noting specially, so that particular error
6384 62. When Exim is trying to find all the local interfaces, it used to panic and
6385 die if the ioctl to get the interface flags failed. However, it seems that
6386 on at least one OS (Solaris 9) it is possible to have an interface that is
6387 included in the list of interfaces, but for which you get a failure error
6388 for this call. This happens when the interface is not "plumbed" into a
6389 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6390 failure of the "get flags" call assumes that the interface is down.
6392 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6393 makes life easier for people who are doing arithmetic on fields extracted
6394 from dates, where you often get leading zeros that should not be
6395 interpreted as octal.
6397 64. Added qualify_domain to the redirect router, to override the global
6400 65. If a pathologically long header line contained very many addresses (the
6401 report of this problem mentioned 10 000) and each of them was rewritten,
6402 Exim could use up a very large amount of memory. (It kept on making new
6403 copies of the header line as it rewrote, and never released the old ones.)
6404 At the expense of a bit more processing, the header rewriting function has
6405 been changed so that it no longer eats memory in this way.
6407 66. The generation of the Received: header has been moved from the time that a
6408 message starts to be received, to the time that it finishes. The timestamp
6409 in the Received: header should now be very close to that of the <= log
6410 line. There are two side-effects of this change:
6412 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6413 logged header lines no longer include the local Received: line, because
6414 it has not yet been created. The same applies to a copy of the message
6415 that is returned to a non-SMTP sender when a message is rejected.
6417 (b) When a filter file is tested using -bf, no additional Received: header
6418 is added to the test message. After some thought, I decided that this
6421 This change does not affect the value of $received_for. It is still set
6422 after address rewriting, but before local_scan() is called.
6424 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6426 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6427 gave an unhelpful panic error message, and a defer error. I have managed to
6428 change this behaviour so that it now rejects any supplied certificate,
6429 which seems right, as the list of acceptable certificates is empty.
6431 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6432 gave an unhelpful defer error. I have not managed to make this reject any
6433 supplied certificates, but the error message it gives is "no certificate
6434 supplied", which is not helpful.
6436 70. exigrep's output now also includes lines that are not associated with any
6437 message, but which match the given pattern. Implemented by a patch from
6438 Martin Sluka, which also tidied up the Perl a bit.
6440 71. Recipient callout verification, like sender verification, was using <> in
6441 the MAIL FROM command. This isn't really the right thing, since the actual
6442 sender may affect whether the remote host accepts the recipient or not. I
6443 have changed it to use the actual sender in the callout; this means that
6444 the cache record is now keyed on a recipient/sender pair, not just the
6445 recipient address. There doesn't seem to be a real danger of callout loops,
6446 since a callout by the remote host to check the sender would use <>.
6447 [SEE ABOVE: changed after hitting problems.]
6449 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6450 temporary errors. However, in the case of such a code being given after
6451 the end of a data transmission (i.e. after ".") Exim was failing to write
6452 a retry record for the message. (Yes, there was some broken host that was
6453 actually sending 8xx at this point.)
6455 73. An unknown lookup type in a host list could cause Exim to panic-die when
6456 the list was checked. (An example that provoked this was putting <; in the
6457 middle of a list instead of at the start.) If this happened during a DATA
6458 ACL check, a -D file could be left lying around. This kind of configuration
6459 error no longer causes Exim to die; instead it causes a defer error. The
6460 incident is still logged to the main and panic logs.
6462 74. Buglet left over from Exim 3 conversion. The message "too many messages
6463 in one connection" was written to the rejectlog but not the mainlog, except
6464 when address rewriting (yes!) was being logged.
6466 75. Added write_rejectlog option.
6468 76. When a system filter was run not as root (that is, when system_filter_user
6469 was set), the values of the $n variables were not being returned to the
6470 main process; thus, they were not subsequently available in the $sn
6473 77. Added +return_path_on_delivery log selector.
6475 78. A connection timeout was being treated differently from recipients deferred
6476 when testing hosts_max_try with a message that was older than the host's
6477 retry timeout. (The host should not be counted, thus allowing all hosts to
6478 be tried at least once before bouncing.) This may have been the cause of an
6479 occasionally reported bug whereby a message would remain on the queue
6480 longer than the retry timeout, but would be bounced if a delivery was
6481 forced. I say "may" because I never totally pinned down the problem;
6482 setting up timeout/retry tests is difficult. See also the next item.
6484 79. The ultimate address timeout was not being applied to errors that involved
6485 a combination of host plus message (for example, a timeout on a MAIL
6486 command). When an address resolved to a number of possible hosts, and they
6487 were not all tried for each delivery (e.g. because of hosts_max_try), a
6488 message could remain on the queue longer than the retry timeout.
6490 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6493 81. Fixed an obscure SMTP outgoing bug which required at least the following
6494 conditions: (a) there was another message waiting for the same server;
6495 (b) the server returned 5xx to all RCPT commands in the first message so
6496 that the message was not completed; (c) the server dropped the connection
6497 or gave a negative response to the RSET that Exim sends to abort the
6498 transaction. The observed case was a dropped connection after DATA that had
6499 been sent in pipelining mode. That is, the server had advertised PIPELINING
6500 but was not implementing it correctly. The effect of the bug was incorrect
6501 behaviour, such as trying another host, and this could lead to a crash.
6507 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6508 and daemon.c were passed as pointers to ints; they should have been
6509 pointers to socklen_t variables (which are typically unsigned ints).
6511 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6514 3. Fixed a really odd bug that affected only the testing scheme; patching a
6515 certain fixed string in the binary changed the value of another string that
6516 happened to be identical to the end of the original first string.
6518 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6519 name", it returns that address as the IP address. On some operating
6520 systems (e.g. Solaris), it also passes back the IP address string as the
6521 "host name". However, on others (e.g. Linux), it passes back an empty
6522 string. Exim wasn't checking for this, and was changing the host name to an
6523 empty string, assuming it had been canonicalized.
6525 5. Although rare, it is permitted to have more than one PTR record for a given
6526 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6527 all the names associated with an address, because they do in Solaris.
6528 However, it seems that they do not in Linux for data that comes from the
6529 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6530 I found this out when I moved to a new Linux workstation and tried to run
6531 the Exim test suite.
6533 To get round this problem I have changed the code so that it now does its
6534 own call to the DNS to look up PTR records when searching for a host name.
6535 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6536 addresses that are only in /etc/hosts are still found.
6538 This behaviour is, however, controlled by an option called host_lookup_
6539 order, which defaults to "bydns:byaddr". If people want to use the other
6540 order, or indeed, just use one or the other means of lookup, they can
6541 specify it in this variable.
6543 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6544 some operating systems, this comes back from gethostbyaddr() as an empty
6545 string, and this is what Exim used to test for. However, it seems that in
6546 other systems, "." is yielded. Exim now tests for this case too.
6548 7. The values of check_spool_space and check_log_space are now held internally
6549 as a number of kilobytes instead of an absolute number of bytes. If a
6550 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6551 kilobyte. This means that much larger values can be stored.
6553 8. Exim monitor: an attempt to get the action menu when not actually pointing
6554 at a message produces an empty menu entitled "No message selected". This
6555 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6556 no entries in it ("Shell widget menu has zero width and/or height"). So I
6557 have added a single, blank menu entry in this case.
6559 9. Added ${quote_local_part.
6561 10. MIME decoding is now applied to the contents of Subject: header lines when
6564 11. Now that a reference to $sender_host_address automatically causes a reverse
6565 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6566 host lookup before query-style lookups in lists that might use this
6567 variable. This has therefore been abolished, and the "net-" prefix is no
6568 longer necessary for query-style lookups.
6570 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6571 have been a typo for LFLAGS, so it has been changed.
6573 13. The install script calls Exim with "-C /dev/null" in order to find the
6574 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6575 to be output. However, since Exim outputs its version number before the
6576 error, it didn't break the script. It just looked ugly. I fixed this by
6577 always allowing "-C /dev/null" if the caller is root.
6579 14. Ignore overlarge ACL variable number when reading spool file - insurance
6580 against a later release with more variables having written the file.
6582 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6583 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6584 this, as well as the form without the "IPv6" on the front.
6586 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6587 OS/Makefile-Darwin file.
6589 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6590 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6592 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6593 variable. However, some OS use ints for inodes. I've added cast to long int
6594 to get rid of the compiler warning.
6596 19. I had forgotten to lock out "/../" in configuration file names when
6597 ALT_CONFIG_PREFIX was set.
6599 20. Routers used for verification do not need to specify transports. However,
6600 if such a router generated a host list, and callout was configured, Exim
6601 crashed, because it could not find a port number from the (non-existent)
6602 transport. It now assumes port 25 in this circumstance.
6604 21. Added the -t option to exigrep.
6606 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6607 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6608 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6609 them is set, LOOKUP_LSEARCH is forced.
6611 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6613 24. Added sender and host information to the "rejected by local_scan()" log
6614 line; previously there was no indication of these.
6616 25. Added .include_if_exists.
6618 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6619 Linux. It turns out that not all file systems support this. Apparently some
6620 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6621 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6622 not supported on the file descriptor, is now ignored when Exim is trying to
6623 sync a directory. This applies only to Linux.
6625 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6627 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6628 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6631 29. Added support for maildirsize files from supplied patch (modified a bit).
6633 30. The use of :fail: followed by an empty string could lead Exim to respond to
6634 sender verification failures with (e.g.):
6636 550 Verification failed for <xxx>
6637 550 Sender verify failed
6639 where the first response line was missing the '-' that indicates it is not
6640 the final line of the response.
6642 31. The loop for finding the name of the user that called Exim had a hardwired
6643 limit of 10; it now uses the value of finduser_retries, which is used for
6644 all other user lookups.
6646 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6649 33. Exim was neglecting to zero errno before one call of strtol() when
6650 expanding a string and expecting an integer value. On some systems this
6651 resulted in spurious "integer overflow" errors. Also, it was casting the
6652 result into an int without checking.
6654 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6655 did not work. The code looks as if it has *never* worked, though it appears
6656 to have been documented since at least release 1.62. I have made it work.
6658 35. The "timeout_DNS" error in retry rules, also documented since at least
6659 1.62, also never worked. As it isn't clear exactly what this means, and
6660 clearly it isn't a major issue, I have abolished the feature by treating it
6661 as "timeout", and writing a warning to the main and panic logs.
6663 36. The display of retry rules for -brt wasn't always showing the error code
6666 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6667 timeout_connect_A, timeout_connect_MX.
6669 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6670 to the empty sender.
6672 39. The daemon was not analysing the content of -oX till after it had closed
6673 stderr and disconnected from the controlling terminal. This meant that any
6674 syntax errors were only noted on the panic log, and the return code from
6675 the command was 0. By re-arranging the code a little, I've made the
6676 decoding happen first, so such errors now appear on stderr, and the return
6677 code is 1. However, the actual setting up of the sockets still happens in
6678 the disconnected process, so errors there are still only recorded on the
6681 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6682 connections (as happens on some IP stacks) was logged at start up time as
6683 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6684 it from "IPv6 and IPv4", which means that two separate sockets are being
6687 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6688 says whether AF_INET or AF_INET6 was passed as an argument.
6690 42. Exiwhat output was messed up when time zones were included in log
6693 43. Exiwhat now gives more information about the daemon's listening ports,
6694 and whether -tls-on-connect was used.
6696 44. The "port" option of the smtp transport is now expanded.
6698 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6699 silently ignored. Now an error message is written to the main and panic
6702 46. There's a new ACL modifier called "logwrite" which writes to a log file
6703 as soon as it is encountered.
6705 47. Added $local_user_uid and $local_user_gid at routing time.
6707 48. Exim crashed when trying to verify a sender address that was being
6710 49. Exim was recognizing only a space character after ".include". It now also
6711 recognizes a tab character.
6713 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6714 extracting the relevant information from the specification. The man page no
6715 longer contains scrambled data for the -d option, and I've added a section
6716 at the front about calling Exim under different names.
6718 51. Added "extra_headers" argument to the "mail" command in filter files.
6720 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6723 53. Installed eximstats 1.29.
6725 54. Added transport_filter_timeout as a generic transport option.
6727 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6728 Cc: header lines. This was required by RFC 822, but it not required by RFC
6731 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6732 incoming messages that did not have them. Now it does so only if the
6733 message originates locally, that is, if there is no associated remote host
6734 address. When Resent- header lines are present, this applies to the Resent-
6735 lines rather than the non-Resent- lines.
6737 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6738 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6740 58. Messages for configuration errors now include the name of the main
6741 configuration file - useful now that there may be more than one file in a
6742 list (.included file names were always shown).
6744 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6745 for those rare installations that do not start the daemon as root or run it
6746 setuid root. I've cut out the call to initgroups() if the daemon is not
6749 60. The Exim user and group can now be bound into the binary as text strings
6750 that are looked up at the start of Exim's processing.
6752 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6754 62. Added $mailstore_basename variable.
6756 63. Installed patch to sieve.c from Michael Haardt.
6758 64. When Exim failed to open the panic log after failing to open the main log,
6759 the original message it was trying to log was written to stderr and debug
6760 output, but if they were not available (the usual case in production), it
6761 was lost. Now it is written to syslog before the two lines that record the
6762 failures to open the logs.
6764 65. Users' Exim filters run in subprocesses under the user's uid. It is
6765 possible for a "deliver" command or an alias in a "personal" command to
6766 provoke an address rewrite. If logging of address rewriting is configured,
6767 this fails because the process is not running as root or exim. There may be
6768 a better way of dealing with this, but for the moment (because 4.30 needs
6769 to be released), I have disabled address rewrite logging when running a
6770 filter in a non-root, non-exim process.
6776 1. The buildconfig auxiliary program wasn't quoting the value set for
6777 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6778 not defined. This bug was masked in 4.22 by the effect that was fixed in
6781 2. Some messages that were rejected after a message id was allocated were
6782 shown as "incomplete" by exigrep. It no longer does this for messages that
6783 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6785 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6786 have allow_domain_literals set, the ID did not get logged in the <= line.
6787 Domain literals are now always recognized in Message-ID: header lines.
6789 4. The first argument for a ${extract expansion item is the key name or field
6790 number. Leading and trailing spaces in this item were not being ignored,
6791 causing some misleading effects.
6793 5. When deliver_drop_privilege was set, single queue runner processes started
6794 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6795 same command in the process it spins off) were not dropping privilege.
6797 6. When the daemon running as "exim" started a queue runner, it always
6798 re-executed Exim in the spun-off process. This is a waste of effort when
6799 deliver_drop_privilege is set. The new process now just calls the
6800 queue-runner function directly.
6806 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6809 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6810 ignored. Though the use of -oP was forcing the writing of a pid file, it
6811 was always written to the default place.
6813 3. If the message "no IP address found for host xxxx" is generated during
6814 incoming verification, it is now followed by identification of the incoming
6815 connection (so you can more easily find what provoked it).
6817 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6819 5. Added some features to "harden" Exim a bit more against certain attacks:
6821 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6822 be put in Local/Makefile. This is like the never_users runtime option,
6823 but it cannot be overridden. The default setting is "root".
6825 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6826 prefix string with which any file named in a -C command line option
6829 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6830 is retained for -C and -D only if the caller of Exim is root. Without
6831 it, the exim user may also use -C and -D and retain privilege.
6833 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6834 command line option is disabled.
6836 6. Macro names set by the -D option must start with an upper case letter, just
6837 like macro names defined in the configuration file.
6839 7. Added "dereference=" facility to LDAP.
6841 8. Two instances of the typo "uknown" in the source files are fixed.
6843 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6844 the Configure-Makefile script screwed up while processing it.
6846 10. Incorporated PCRE 4.4.
6848 11. The SMTP synchronization check was not operating right at the start of an
6849 SMTP session. For example, it could not catch a HELO sent before the client
6850 waited for the greeting. There is now a check for outstanding input at the
6851 point when the greeting is written. Because of the duplex, asynchronous
6852 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6853 way, but not yet received, when the check is performed.
6855 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6856 on TCP/IP sockets, because this apparently causes some broken clients to
6859 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6860 unchanged) from the Cygwin maintainer.
6862 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6863 was supported instead of testing for mbx. Effectively a typo.
6865 15. The spa authenticator server code was not checking that the input it
6866 received was valid base64.
6868 16. The debug output line for the "set" modifier in ACLs was not showing the
6869 name of the variable that was being set.
6871 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6873 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6874 lookup on its own. Something else was needed to trigger the lookup. For
6875 example, a match in host_lookup or the need for a host name in a host list.
6876 Now, if $sender_host_name is referenced and the host name has not yet been
6877 looked up, a lookup is performed. If the lookup fails, the variable remains
6878 empty, and $host_lookup_failed is set to "1".
6880 19. Added "eqi" as a case-independent comparison operator.
6882 20. The saslauthd authentication condition could segfault if neither service
6883 nor realm was specified.
6885 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6886 error message that was logged was misleading, and incoming SMTP
6887 connections were dropped. The message is now more accurate, and temporary
6888 errors are given to SMTP connections.
6890 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6891 (except RSET) with a 421 error, until QUIT is received. However, it was
6892 failing to send a response to QUIT.
6894 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6895 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6896 ACL is now run after the helo_try_verify_hosts code.
6898 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6899 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6900 case-independent, so other case variants are also recognized). Apparently
6901 some systems use these upper case variants.
6903 25. If more than two messages were waiting for the same host, and a transport
6904 filter was specified for the transport, Exim sent two messages over the
6905 same TCP/IP connection, and then failed with "socket operation on non-
6906 socket" when it tried to send the third.
6908 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6910 27. The extern definition of crypt16() in expand.c was not being excluded when
6911 the OS had its own crypt16() function.
6913 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6914 as a preferred synonym for return_size_limit, both as an option and as an
6917 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6919 30. Changed the default configuration ACL to relax the local part checking rule
6920 for addresses that are not in any local domains. For these addresses,
6921 slashes and pipe symbols are allowed within local parts, but the sequence
6922 /../ is explicitly forbidden.
6924 31. SPA server authentication was not clearing the challenge buffer before
6927 32. log_message in a "warn" ACL statement was writing to the reject log as
6928 well as to the main log, which contradicts the documentation and doesn't
6929 seem right (because no rejection is happening). So I have stopped it.
6931 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6932 However, I am unable to do any testing of this.
6934 34. Fixed an infelicity in the appendfile transport. When checking directories
6935 for a mailbox, to see if any needed to be created, it was accidentally
6936 using path names with one or more superfluous leading slashes; tracing
6937 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6939 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6940 contents are added to the log line that is written for every discarded
6941 recipient. (Previously a log_message setting was ignored.)
6943 36. The ${quote: operator now quotes the string if it is empty.
6945 37. The install script runs exim in order to find its version number. If for
6946 some reason other than non-existence or emptiness, which it checks, it
6947 could not run './exim', it was installing it with an empty version number,
6948 i.e. as "exim-". This error state is now caught, and the installation is
6951 38. An argument was missing from the function that creates an error message
6952 when Exim fails to connect to the socket for saslauthd authentication.
6953 This could cause Exim to crash, or give a corrupted message.
6955 39. Added isip, isip4, and isip6 to ${if conditions.
6957 40. The ACL variables $acl_xx are now saved with the message, and can be
6958 accessed later in routers, transports, and filters.
6960 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6961 strings in the file are not string-expanded.
6963 42. If a MAIL command specified a SIZE value that was too large to fit into an
6964 int variable, the check against message_size_limit failed. Such values are
6965 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6966 day this will have to be increased, but I don't think I want to be around
6967 when emails are that large.
6974 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6975 iconv() is not standard in FreeBSD.
6977 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6978 IPv6 enabled. The observed symptom was a segmentation fault on return from
6979 the function os_common_find_running_interfaces() in src/os.c.
6981 3. In the check_special_case() function in daemon.c I had used "errno" as an
6982 argument name, which causes warnings on some systems. This was basically a
6983 typo, since it was named "eno" in the comments!
6985 4. The code that waits for the clock to tick (at a resolution of some fraction
6986 of a second) so as to ensure message-id uniqueness was always waiting for
6987 at least one whole tick, when it could have waited for less. [This is
6988 almost certainly not relevant at current processor speeds, where it is
6989 unlikely to ever wait at all. But we try to future-proof.]
6991 5. The function that sleeps for a time interval that includes fractions of a
6992 second contained a race. It did not block SIGALRM between setting the
6993 timer, and suspending (a couple of lines later). If the interval was short
6994 and the sigsuspend() was delayed until after it had expired, the suspension
6995 never ended. On busy systems this could lead to processes getting stuck for
6998 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6999 process, before it forks any delivery processes. The open lookup caching
7000 mechanism meant that the open file or database connection was passed into
7001 the delivery process. The problem was that delivery processes always tidy
7002 up cached lookup data. This could cause a problem for the next delivery
7003 process started by the queue runner, because the external queue runner
7004 process does not know about the closure. So the next delivery process
7005 still has data in the lookup cache. In the case of a file lookup, there was
7006 no problem because closing a file descriptor in a subprocess doesn't affect
7007 the parent. However, if the lookup was caching a connection to a database,
7008 the connection was closed, and the second delivery process was likely to
7009 see errors such as "PGSQL: query failed: server closed the connection
7010 unexpectedly". The problem has been fixed by closing all cached lookups
7011 in a queue runner before running a delivery process.
7013 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7014 seem to have the "const" qualifier which it has on other OS. I've
7017 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7018 *of the same type* (client or server) with the same public name that an
7019 error should be diagnosed.
7021 9. When Exim looked up a host name for an IP address, but failed to find the
7022 original IP address when looking up the host name (a safety check), it
7023 output the message "<ip address> does not match any IP for NULL", which was
7024 confusing, to say the least. The bug was that the host name should have
7025 appeared instead of "NULL".
7027 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7028 user that is built into the binary, and the -C or -D options is used, root
7029 privilege is dropped before the configuration file is read. In addition,
7030 logging is switched to stderr instead of the normal log files. If the
7031 configuration then re-defines the Exim user, the unprivileged environment
7032 is probably not what is expected, so Exim logs a panic warning message (but
7035 However, if deliver_drop_privilege is set, the unprivileged state may well
7036 be exactly what is intended, so the warning has been cut out in that case,
7037 and Exim is allowed to try to write to its normal log files.
7043 1. smtp_return_error_details was not giving details for temporary sender
7044 or receiver verification errors.
7046 2. Diagnose a configuration error if two authenticators have the same public
7049 3. Exim used not to create the message log file for a message until the first
7050 delivery attempt. This could be confusing when incoming messages were held
7051 for policy or load reasons. The message log file is now created at the time
7052 the message is received, and an initial "Received" line is written to it.
7054 4. The automatically generated man page for command line options had a minor
7055 bug that caused no ill effects; however, a more serious problem was that
7056 the procedure for building the man page automatically didn't always
7057 operate. Consequently, release 4.20 contains an out-of-date version. This
7058 shouldn't happen again.
7060 5. When building Exim with embedded Perl support, the script that builds the
7061 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7062 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7064 6. The freeze_tell option was not being used for messages that were frozen on
7065 arrival, either by an ACL or by local_scan().
7067 7. Added the smtp_incomplete_transaction log selector.
7069 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7070 was accepting AUTH without a new EHLO.
7072 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7073 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7076 10. Logging of TCP/IP connections (when configured) now happens in the main
7077 daemon process instead of the child process, so that the TCP/IP connection
7078 count is more accurate (but it can never be perfect).
7080 11. The use of "drop" in a nested ACL was not being handled correctly in the
7081 outer ACL. Now, if condition failure induced by the nested "drop" causes
7082 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7083 or "require"), the connection is dropped.
7085 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7086 that yield "discard" can now be used with an "accept" or a "discard" verb,
7087 but an error is generated for any others (because I can't see a useful way
7088 to define what should happen).
7090 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7091 are now processed in the same way as lines in the Exim configuration file.
7092 In particular, continuation lines are supported.
7094 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7096 15. Added -ti meaning -t -i.
7098 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7099 domains, and warn by logging if others are found.
7101 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7102 returned from GIFCONF when Exim is trying to find the list of interfaces on
7103 a host. The code in os.c has been modified to copy each ifreq to an aligned
7104 structure in all cases.
7106 Also, in some cases, the returned ifreq's were being copied to a 'struct
7107 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7108 means the last couple of bytes of an IPv6 address could be chopped if the
7109 ifreq contained only a normal sockaddr (14 bytes storage).
7111 18. Named domain lists were not supported in the hosts_treat_as_local option.
7112 An entry such as +xxxx was not recognized, and was treated as a literal
7115 19. Ensure that header lines added by a DATA ACL are included in the reject log
7116 if the ACL subsequently rejects the message.
7118 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7119 MD5 (which is deprecated).
7121 21. When testing a filter file using -bf, Exim was writing a message when it
7122 took the sender from a "From " line in the message, but it was not doing so
7123 when it took $return_path from a Return-Path: header line. It now does.
7125 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7126 with a valid header line field name (a series of printing characters
7127 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7129 23. Changed "disc" in the source to "disk" to conform to the documentation and
7130 the book and for uniformity.
7132 24. Ignore Sendmail's -Ooption=value command line item.
7134 25. When execve() failed while trying to run a command in a pipe transport,
7135 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7136 could be confused with a return value of 69 from the command itself. This
7137 has been changed to 127, the value the shell returns if it is asked to run
7138 a non-existent command. The wording for the related log line suggests a
7139 non-existent command as the problem.
7141 26. If received_header_text expands to an empty string, do not add a Received:
7142 header line to the message. (Well, it adds a token one on the spool, but
7143 marks it "old" so that it doesn't get used or transmitted.)
7145 27. Installed eximstats 1.28 (addition of -nt option).
7147 28. There was no check for failure on the call to getsockname() in the daemon
7148 code. This can fail if there is a shortage of resources on the system, with
7149 ENOMEM, for example. A temporary error is now given on failure.
7151 29. Contrary to the C standard, it seems that in some environments, the
7152 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7153 program. Exim now does this explicitly; it affects the formatting of
7154 timestamps using strftime().
7156 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7157 complaints. I've now initialized all the variables, to avoid this.
7159 32. Header lines added by a system filter were not being "seen" during
7160 transport-time rewrites.
7162 33. The info_callback() function passed to OpenSSL is set up with type void
7163 (*)(SSL *, int, int), as described somewhere. However, when calling the
7164 function (actually a macro) that sets it up, the type void(*)() is
7165 expected. I've put in a cast to prevent warnings from picky compilers.
7167 34. If a DNS black list lookup found a CNAME record, but there were no A
7168 records associated with the domain it pointed at, Exim crashed.
7170 35. If a DNS black list lookup returned more than one A record, Exim ignored
7171 all but the first. It now scans all returned addresses if a particular IP
7172 value is being sought. In this situation, the contents of the
7173 $dnslist_value variable are a list of all the addresses, separated by a
7176 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7177 to accept a host name and all its aliases if the forward lookup for any of
7178 them yielded the IP address of the incoming connection. Now it accepts only
7179 those names whose forward lookup yields the correct IP address. Any other
7180 names are discarded. This closes a loophole whereby a rogue DNS
7181 administrator could create reverse DNS records to break through a
7182 wildcarded host restriction in an ACL.
7184 37. If a user filter or a system filter that ran in a subprocess used any of
7185 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7186 the wrong values were passed to the pipe command ($thisaddress had the
7187 value of $0, $0 had the value of $1, etc). This bug was introduced by
7188 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7190 38. Improved the line breaking for long SMTP error messages from ACLs.
7191 Previously, if there was no break point between 40 and 75 characters, Exim
7192 left the rest of the message alone. Two changes have been made: (a) I've
7193 reduced the minimum length to 35 characters; (b) if it can't find a break
7194 point between 35 and 75 characters, it looks ahead and uses the first one
7195 that it finds. This may give the occasional overlong line, but at least the
7196 remaining text gets split now.
7198 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7199 file descriptors might be low, and that setting 1000 would always raise it.
7200 It turns out that in some environments, the limit is already over 1000 and
7201 that lowering it causes trouble. So now Exim takes care not to decrease it.
7203 40. When delivering a message, the value of $return_path is set to $sender_
7204 address at the start of routing (routers may change the value). By an
7205 oversight, this default was not being set up when an address was tested by
7206 -bt or -bv, which affected the outcome if any router or filter referred to
7209 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7210 log only when "message" or "log_message" are set. However, if one of the
7211 conditions was an address verification, or a call to a nested ACL, the
7212 messages generated by the underlying test were being passed through. This
7213 no longer happens. The underlying message is available in $acl_verify_
7214 message for both "message" and "log_message" expansions, so it can be
7215 passed through if needed.
7217 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7218 new expansion $bh_ to give the encoded byte string without charset
7219 translation. Translation happens only if iconv() is available; HAVE_ICONV
7220 indicates this at build time. HEADERS_CHARSET gives the charset to
7221 translate to; headers_charset can change it in the configuration, and
7222 "headers charset" can change it in an individual filter file.
7224 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7225 that creates RFC 2047 encoded "words" labels them as that charset instead
7226 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7227 expansion operator; (ii) when Exim creates a From: line for a local
7228 message; (iii) when a header line is rewritten to include a "phrase" part.
7230 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7231 buggy, causing it to skip the first lines of messages whose message ID
7232 ended in 'D'. This would not have bitten before Exim release 4.14, because
7233 message IDs were unlikely to end in 'D' before then. The effect was to have
7234 incorrect size information for certain domains.
7236 45. #include "config.h" was missing at the start of the crypt16.c module. This
7237 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7240 46. If there was a timeout during a "random" callout check, Exim treated it as
7241 a failure of the random address, and carried on sending RSET and the real
7242 address. If the delay was just some slowness somewhere, the response to the
7243 original RCPT would be taken as a response to RSET and so on, causing
7244 mayhem of various kinds.
7246 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7247 when I implemented it. It didn't allow for the fact that some option values
7248 may legitimately be negative (e.g. size_addition), and it didn't even do
7249 the right test for positive values.
7251 48. Domain names in DNS records are case-independent. Exim always looks them up
7252 in lower case. Some resolvers return domain names in exactly the case they
7253 appear in the zone file, that is, they may contain uppercase letters. Not
7254 all resolvers do this - some return always lower case. Exim was treating a
7255 change of case by a resolver as a change of domain, similar to a widening
7256 of a domain abbreviation. This triggered its re-routing code and so it was
7257 trying to route what was effectively the same domain again. This normally
7258 caused routing to fail (because the router wouldn't handle the domain
7259 twice). Now Exim checks for this case specially, and just changes the
7260 casing of the domain that it ultimately uses when it transmits the message
7263 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7266 50. If a filter generated a file delivery with a non-absolute name (possible if
7267 no home directory exists for the router), the forbid_file option was not
7270 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7271 the existing equality matching.
7273 52. Exim was using ints instead of ino_t variables in some places where it was
7274 dealing with inode numbers.
7276 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7277 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7278 called TMPDIR, and if it finds it is different, it changes its value.
7280 54. The smtp_printf() function is now made available to local_scan() so
7281 additional output lines can be written before returning. There is also an
7282 smtp_fflush() function to enable the detection of a dropped connection.
7283 The variables smtp_input and smtp_batched_input are exported to
7286 55. Changed the default runtime configuration: the message "Unknown user"
7287 has been removed from the ACL, and instead placed on the localuser router,
7288 using the cannot_route_message feature. This means that any verification
7289 failures that generate their own messages won't get overridden. Similarly,
7290 the "Unrouteable address" message that was in the ACL for unverifiable
7291 relay addresses has also been removed.
7293 56. Added hosts_avoid_esmtp to the smtp transport.
7295 57. The exicyclog script was not checking for the esoteric option
7296 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7297 will work only if exicyclog is run under the appropriate euid.
7299 58. Following a discussion on the list, the rules by which Exim recognises line
7300 endings on incoming messages have been changed. The -dropcr and drop_cr
7301 options are now no-ops, retained only for backwards compatibility. The
7302 following line terminators are recognized: LF CRLF CR. However, special
7303 processing applies to CR:
7305 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7306 nor a local message in the state where . is a terminator.
7308 (ii) If a bare CR is encountered in a header line, an extra space is added
7309 after the line terminator so as not to end the header. The reasoning
7310 behind this is that bare CRs in header lines are most likely either
7311 to be mistakes, or people trying to play silly games.
7313 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7314 was being incorrectly given as 18 bytes larger than it should have been.
7315 This is a VOB (very old bug).
7317 60. This may never have affected anything current, but just in case it has:
7318 When the local host is found other than at the start of a list of hosts,
7319 the local host, those with the same MX, and any that follow, are discarded.
7320 When the list in question was part of a longer list of hosts, the following
7321 hosts (not currently being processed) were also being discarded. This no
7322 longer happens. I'm not sure if this situation could ever has previously
7325 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7328 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7329 header. This is something that is recommended in a new Internet Draft, and
7330 is something that is documented as being done by Sendmail. There are two
7331 possible values. For messages generated by the autoreply transport, Exim
7334 Auto-Submitted: auto-replied
7336 whereas for all other generated messages (e.g. bounces) it adds
7338 Auto-Submitted: auto-generated
7340 63. The "personal" condition in filters now includes a test for the
7341 Auto-Submitted: header. If it contains the string "auto-" the message it
7342 not considered personal.
7344 64. Added rcpt_include_affixes as a generic transport option.
7346 65. Added queue_only_override (default true).
7348 66. Added the syslog_duplication option.
7350 67. If what should have been the first header line of a message consisted of
7351 a space followed by a colon, Exim was mis-interpreting it as a header line.
7352 It isn't of course - it is syntactically invalid and should therefore be
7353 treated as the start of the message body. The misbehaviour could have
7354 caused a number of strange effects, including loss of data in subsequent
7355 header lines, and spool format errors.
7357 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7358 client host had authenticated. This control can now be exercised by an ACL
7359 for more flexibility.
7361 69. By default, callouts do not happen when testing with -bh. There is now a
7362 variant, -bhc, which does actually run the callout code, including
7363 consulting and updating the callout cache.
7365 70. Added support for saslauthd authentication, courtesy of Alexander
7368 71. If statvfs() failed on the spool or log directories while checking their
7369 size for availability, Exim confusingly gave the error "space shortage".
7370 Furthermore, in debugging mode it crashed with a floating point exception.
7371 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7372 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7373 serious problem, Exim now writes to the main and panic logs when this
7374 happens, with details of the failure. It then refuses to accept the
7375 incoming message, giving the message "spool directory problem" or "log
7376 directory problem" with a 421 code for SMTP messages.
7378 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7379 0, 1, and 2 exist, because some OS complain for execs without them (see
7380 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7381 descriptors. However, the code omitted to check that the open succeeded,
7382 causing mysterious errors if for some reason the permissions on /dev/null
7383 got screwed. Now Exim writes a message to the main and panic logs, and
7384 bombs out if it can't open /dev/null.
7386 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7387 interact so that it is all more flexible. It is supposed to remain
7388 backwards compatible. Also added extra_local_interfaces.
7390 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7391 to bomb out with an assertion failure - to the client this appears as a
7392 connection drop. This problem occurs in the part of the code that was taken
7393 from the Samba project. Fortunately, the assertion is in a very simple
7394 function, so I have fixed this by reproducing the function inline in the
7395 one place where it is called, and arranging for authentication to fail
7396 instead of killing the process with assert().
7398 75. The SPA client code was not working when the server requested OEM rather
7399 than Unicode encoding.
7401 76. Added code to make require_files with a specific uid setting more usable in
7402 the case where statting the file as root fails - usually a non-root-mounted
7403 NFS file system. When this happens and the failure is EACCES, Exim now
7404 forks a subprocess and does the per-uid checking as the relevant uid.
7406 77. Added process_log_path.
7408 78. If log_file_path was not explicitly set, a setting of check_log_space or
7409 check_log_inodes was ignored.
7411 79. If a space check for the spool or log partitions fails, the incident is now
7412 logged. Of course, in the latter case the data may get lost...
7414 80. Added the %p formatting code to string_format() so that it can be used to
7415 print addresses in debug_print(). Adjusted all the address printing in the
7416 debugging in store.c to use %p rather than %d.
7418 81. There was a concern that a line of code in smtp_in.c could overflow a
7419 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7420 initially expressed, the concern was not well-founded, because trailing
7421 spaces are removed early. However, if the trailing spaces were followed by
7422 a NULL, they did not get removed, so the overflow was possible. Two fixes
7425 (a) I re-wrote the offending code in a cleaner fashion.
7426 (b) If an incoming SMTP command contains a NULL character, it is rejected
7429 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7430 runs initgroups(), so that if the Exim user is in any additional groups,
7431 they will be used during message reception.
7437 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob