1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
12 side, to decode a TLS 1.3 packet capture.
14 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
15 Previously the default library behaviour applied, sending two, each in
18 JH/03 Debug output for ACL now gives the config file name and line number for
21 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
23 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
25 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
26 buffer overrun for (non-chunking) other transports.
28 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
29 TLS1.3, means that a server rejecting a client certificate is not visible
30 to the client until the first read of encrypted data (typically the
31 response to EHLO). Add detection for that case and treat it as a failed
32 TLS connection attempt, so that the normal retry-in-clear can work (if
35 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
36 and/or domain. Found and fixed by Jason Betts.
38 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
39 configuration). If a CNAME target was not a wellformed name pattern, a
42 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
43 the OS reports them interleaved with other addresses.
45 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
46 used both for input and for a verify callout, both encrypted, SMTP
47 responses being sent by the server could be lost. This resulted in
48 dropped connections and sometimes bounces generated by a peer sending
51 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
52 string. Previously it was possible to cause undefined behaviour in a
53 library routine (usually a crash). Found by "zerons".
55 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
58 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
59 API was removed, so update to use the newer ones.
61 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
62 any timeout set, is taking a long time. Previously we would hang on to a
63 rotated logfile "forever" if the input was arriving with long gaps
64 (a previous attempt to fix addressed lack, for a long time, of initial
67 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
68 shared (NFS) environment. The length of the tempfile name is now
69 4 + 16 ("hdr.$message_exim_id") which might break on file
70 systems which restrict the file name length to lower values.
73 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
74 shared (NFS) environment.
76 HS/02 Bug 2392: exigrep does case sensitive *option* processing (as it
77 did for all versions <4.90). Notably -M, -m, --invert, -I may be
80 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
81 on some platforms for bit 31.
83 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
84 to changes apparently associated with TLS1.3 handling some of the APIs
85 previously used were either nonfunctional or inappropriate. Strings
86 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
87 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
88 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
89 This affects log line X= elements, the $tls_{in,out}_cipher variables,
90 and the use of specific cipher names in the encrypted= ACL condition.
92 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
94 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
95 verification result was not updated unless hosts_require_ocsp applied.
97 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
98 queue_list_requires_admin set to false, non-admin users were denied the
101 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
102 directory-of-certs mode. Previously they were advertised despite the
105 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
106 A single TCP connection by a client will now hold a TLS connection open
107 for multiple message deliveries, by default. Previoud the default was to
110 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
111 default. If built with the facility, DANE will be used. The facility is
112 now enabled in the prototype build Makefile "EDITME".
119 JH/01 Remove code calling the customisable local_scan function, unless a new
120 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
122 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
123 non-signal-safe functions being used.
125 JH/03 Bug 2269: When presented with a received message having a stupidly large
126 number of DKIM-Signature headers, disable DKIM verification to avoid
127 a resource-consumption attack. The limit is set at twenty.
129 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
130 report of oldest_pass in ${authres } in consequence, and separate out
131 some descriptions of reasons for verification fail.
133 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
134 files in the spool were present and unlocked. A queue-runner could spot
135 them, resulting in a duplicate delivery. Fix that by doing the unlock
136 after the unlink. Investigation by Tim Stewart. Take the opportunity to
137 add more error-checking on spoolfile handling while that code is being
140 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
141 No known attacks, no CVE, this is defensive hardening.
143 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
144 a queue-runner could start a delivery while other operations were ongoing.
145 Cutthrough delivery was a common victim, resulting in duplicate delivery.
146 Found and investigated by Tim Stewart. Fix by using the open message data
147 file handle rather than opening another, and not locally closing it (which
148 releases a lock) for that case, while creating the temporary .eml format
149 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
151 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
152 $sender_verify_failure/$recipient_verify_failure to "random".
154 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
157 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
158 Previously this would segfault.
160 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
163 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
164 like zero, since the resolver should be doing this for us, But we need one
165 as a CNAME but no MX presence gets the CNAME returned; we need to check
166 that doesn't point to an MX to declare it "no MX returned" rather than
167 "error, loop". A new main option is added so the older capability of
168 following some limited number of chain links is maintained.
170 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
172 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
173 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
174 now-deprecated earlier definitions used only specified the range up to TLS
175 1.2 (in the older-version library docs).
177 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
179 JH/15 Rework TLS client-side context management. Stop using a global, and
180 explicitly pass a context around. This enables future use of TLS for
181 connections to service-daemons (eg. malware scanning) while a client smtp
182 connection is using TLS; with cutthrough connections this is quite likely.
184 JH/16 Fix ARC verification to do AS checks in reverse order.
186 JH/17 Support a "tls" option on the ${readsocket } expansion item.
188 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
189 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
190 Previously the "utf8" would be re-prepended for every additional message.
192 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
193 Previously thery were accepted, resulting in issues when attempting to
194 forward messages to a non-supporting MTA.
196 PP/02 Let -n work with printing macros too, not just options.
198 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
199 one parent address was copied, and bogus data was used at delivery-logging
200 time. Either a crash (after delivery) or bogus log data could result.
201 Discovery and analysis by Tim Stewart.
203 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
204 Previously if the string ended mid-character, we did not insert the
205 promised '?' replacement.
207 PP/04 Documentation: current string operators work on bytes, not codepoints.
209 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
210 should pack well giving a smaller memory footprint so better caching and
211 therefore performance. Group the declarations where this can't be done so
212 that the byte-sized flag variables are not interspersed among pointer
213 variables, giving a better chance of good packing by the compiler.
215 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
216 non-null, to avoid issues with sites running BATV. Previously reports were
217 sent with an empty envelope sender so looked like bounces.
219 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
220 The ignore_error flag wasn't being returned from the filter subprocess so
221 was not set for later routers. Investigation and fix by Matthias Kurz.
223 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
224 and a msg:complete for the whole, when a message is manually removed using
225 -Mrm. Developement by Matthias Kurz, hacked on by JH.
227 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
228 a "Gnu special" function, asprintf() in the DB utility binary builds; I
229 hope that is portable enough.
231 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
232 requiring a known-CA anchor certificate; make it now rely entirely on the
233 TLSA as an anchor. Checking the name on the leaf cert against the name
234 on the A-record for the host is still done for TA (but not for EE mode).
236 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
237 included in delivery lines for non-proxied connections, when compiled with
238 SUPPORT_SOCKS and running with proxy logging enabled.
240 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
241 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
242 move the existing event to fire before the normal logging of message
243 failure so that custom logging is bracketed by normal logging.
245 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
246 msg:fail:internal event. Developement by Matthias Kurz.
248 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
249 far too small for todays use of crypto signatures stored there. Go all
250 the way to the max DNS message size of 64kB, even though this might be
251 overmuch for IOT constrained device use.
253 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
254 copy a string over itself. The library routine is documented as not
255 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
257 JH/32 For main options check_spool_space and check_inode_space, where the
258 platform supports 64b integers, support more than the previous 2^31 kB
259 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
260 the previous G, M, k.
262 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
263 $authenticated_fail_id variable on authentication failure. Previously
266 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
267 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
268 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
269 GNUTLS_SEC_PARAM_MEDIUM.
271 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
272 side. Previously we would continue as if no SNI had been received.
274 JH/36 Harden the handling of string-lists. When a list consisted of a sole
275 "<" character, which should be a list-separator specification, we walked
276 off past the nul-terimation.
278 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
279 causes) even when the retry time is not yet met. Previously they were
280 not, meaning that when (say) an account was over-quota and temp-rejecting,
281 and multiple senders' messages were queued, only one sender would get
282 notified on each configured delay_warning cycle.
284 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
286 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
287 cipher-suites, an error can be left on the stack even for a succeeding
288 accept; this results in impossible error messages when a later operation
291 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
292 return error codes indicating retry. Under TLS1.3 this becomes required.
294 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
295 it only wrote the new authenticators, resulting in a lack of tracking of
296 peer changes of ESMTP extensions until the next cache flush.
298 JH/41 Fix the loop reading a message header line to check for integer overflow,
299 and more-often against header_maxsize. Previously a crafted message could
300 induce a crash of the recive process; now the message is cleanly rejected.
302 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
303 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
309 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
310 When redis_servers is set to a list of > 1 element, and the Redis servers
311 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
312 case of MOVED into a DEFER case instead, thus moving the query onto the
313 next server in the list. For a cluster of N elements, all N servers must
314 be defined in redis_servers.
316 GF/02 Catch and remove uninitialized value warning in exiqsumm
317 Check for existence of @ARGV before looking at $ARGV[0]
319 JH/01 Replace the store_release() internal interface with store_newblock(),
320 which internalises the check required to safely use the old one, plus
321 the allocate and data copy operations duplicated in both (!) of the
322 extant use locations.
324 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
325 modifier. This matches the restriction on the commandline.
327 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
328 Previously only the last row was returned.
330 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
331 we assumed that tags in the header were well-formed, and parsed the
332 element content after inspecting only the first char of the tag.
333 Assumptions at that stage could crash the receive process on malformed
336 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
337 While running the DKIM ACL we operate on the Permanent memory pool so that
338 variables created with "set" persist to the DATA ACL. Also (at any time)
339 DNS lookups that fail create cache records using the Permanent pool. But
340 expansions release any allocations made on the current pool - so a dnsdb
341 lookup expansion done in the DKIM ACL releases the memory used for the
342 DNS negative-cache, and bad things result. Solution is to switch to the
343 Main pool for expansions.
344 While we're in that code, add checks on the DNS cache during store_reset,
345 active in the testsuite.
346 Problem spotted, and debugging aided, by Wolfgang Breyha.
348 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
349 When none of the hosts presented to a transport match an already-open
350 connection, close it and proceed with the list. Previously we would
351 queue the message. Spotted by Lena with Yahoo, probably involving
354 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
355 Previously a spurious "250 OK id=" response was appended to the proper
358 JH/08 The "support for" informational output now, which built with Content
359 Scanning support, has a line for the malware scanner interfaces compiled
360 in. Interface can be individually included or not at build time.
362 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
363 by the template makefile "src/EDITME". The "STREAM" support for an older
364 ClamAV interface method is removed.
366 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
367 rows affected is given instead).
369 JH/11 The runtime Berkeley DB library version is now additionally output by
370 "exim -d -bV". Previously only the compile-time version was shown.
372 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
373 SMTP connection. Previously, when one had more receipients than the
374 first, an abortive onward connection was made. Move to full support for
375 multiple onward connections in sequence, handling cutthrough connection
376 for all multi-message initiating connections.
378 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
379 routers. Previously, a multi-recipient message would fail to match the
380 onward-connection opened for the first recipient, and cause its closure.
382 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
383 a timeout on read on a GnuTLS initiating connection, resulting in the
384 initiating connection being dropped. This mattered most when the callout
385 was marked defer_ok. Fix to keep the two timeout-detection methods
388 JH/15 Relax results from ACL control request to enable cutthrough, in
389 unsupported situations, from error to silently (except under debug)
390 ignoring. This covers use with PRDR, frozen messages, queue-only and
393 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
395 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
396 metadata, resulting in a crash in free().
398 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
399 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
400 Broken also in d185889f4, with init system revamp.
402 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
403 Previously we abruptly closed the connection after reading a malware-
404 found indication; now we go on to read the "scan ok" response line,
407 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
408 ACL. Previously, a crash would result.
410 JH/19 Speed up macro lookups during configuration file read, by skipping non-
411 macro text after a replacement (previously it was only once per line) and
412 by skipping builtin macros when searching for an uppercase lead character.
414 JH/20 DANE support moved from Experimental to mainline. The Makefile control
415 for the build is renamed.
417 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
418 was allocated for every new TLS startup, meaning one per message. Fix
419 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
421 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
422 reported the original. Fix to report (as far as possible) the ACL
423 result replacing the original.
425 JH/23 Fix memory leak during multi-message connections using STARTTLS under
426 OpenSSL. Certificate information is loaded for every new TLS startup,
427 and the resources needed to be freed.
429 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
431 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
434 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
435 DATA response info to the (existing) per-recipient response info for
436 the "C=" log element. It can have useful tracking info from the
437 destination system. Patch from Simon Arlott.
439 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
440 length value. Previously this would segfault.
442 HS/02 Support Avast multiline protoocol, this allows passing flags to
443 newer versions of the scanner.
445 JH/28 Ensure that variables possibly set during message acceptance are marked
446 dead before release of memory in the daemon loop. This stops complaints
447 about them when the debug_store option is enabled. Discovered specifically
448 for sender_rate_period, but applies to a whole set of variables.
449 Do the same for the queue-runner and queue-list loops, for variables set
450 from spool message files. Do the same for the SMTP per-message loop, for
451 certain variables indirectly set in ACL operations.
453 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
454 as a multi-recipient message from a mailinglist manager). The coding had
455 an arbitrary cutoff number of characters while checking for more input;
456 enforced by writing a NUL into the buffer. This corrupted long / fast
457 input. The problem was exposed more widely when more pipelineing of SMTP
458 responses was introduced, and one Exim system was feeding another.
459 The symptom is log complaints of SMTP syntax error (NUL chars) on the
460 receiving system, and refused recipients seen by the sending system
461 (propating to people being dropped from mailing lists).
462 Discovered and pinpointed by David Carter.
464 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
465 replaced by the ${authresults } expansion.
467 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
469 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
470 allows proper process termination in container environments.
472 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
473 Previously the "final dot" had a newline after it; ensure it is CR,LF.
475 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
476 and "err_perm", deprecated since 4.83 when the RFC-defined words
477 "temperror" and "permerror" were introduced.
479 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
480 transport-filters or DKIM-signing. The restriction was lost in the
481 consolidation of verify-callout and delivery SMTP handling.
482 Extend the restriction to also cover ARC-signing.
484 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
485 in defer=pass mode supply a 450 to the initiator. Previously the message
488 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
489 tls_require_ciphers is used as before.
491 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
492 "pass_unscanned". Only tmpfails from the scanner are written to
493 the paniclog, as they may require admin intervention (permission
494 denied, license issues). Other scanner errors (like decompression
495 bombs) do not cause a paniclog entry.
497 JH/36 Fix reinitialisation of DKIM logging variable between messages.
498 Previously it was possible to log spurious information in receive log
501 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
502 triggered odd behaviour from Outlook Express clients.
504 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
507 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
508 since the IETF WG has not yet settled on that versus the original
509 "bare" representation.
511 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
512 Previously the millisecond value corrupted the output.
513 Fix also for syslog_pid=no and log_selector +pid, for which the pid
514 corrupted the output.
520 JH/01 Rework error string handling in TLS interface so that the caller in
521 more cases is responsible for logging. This permits library-sourced
522 string to be attached to addresses during delivery, and collapses
523 pairs of long lines into single ones.
525 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
526 during configuration. Wildcards are allowed and expanded.
528 JH/02 Rework error string handling in DKIM to pass more info back to callers.
529 This permits better logging.
531 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
532 do not close it down and have the child transport start it up again on
533 the passed-on TCP connection. Instead, proxy the child (and any
534 subsequent ones) for TLS via a unix-domain socket channel. Logging is
535 affected: the continued delivery log lines do not have any DNSSEC, TLS
536 Certificate or OCSP information. TLS cipher information is still logged.
538 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
539 identical IP addresses on different listening ports. Will also affect
542 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
543 add noisy ifdef guards to special-case this sillyness.
544 Patch from Bernd Kuhls.
546 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
547 than 255 are no longer allowed.
549 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
550 Disable the session-cache too, which might reduce our load. Since we
551 currrectly use a new context for every connection, both as server and
552 client, there is no benefit for these.
553 GnuTLS appears to not support tickets server-side by default (we don't
554 call gnutls_session_ticket_enable_server()) but client side is enabled
555 by default on recent versions (3.1.3 +) unless the PFS priority string
558 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
559 <https://reproducible-builds.org/specs/source-date-epoch/>.
561 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
562 the check for any unsuccessful recipients did not notice the limit, and
563 erroneously found still-pending ones.
565 JH/08 Pipeline CHUNKING command and data together, on kernels that support
566 MSG_MORE. Only in-clear (not on TLS connections).
568 JH/09 Avoid using a temporary file during transport using dkim. Unless a
569 transport-filter is involved we can buffer the headers in memory for
570 creating the signature, and read the spool data file once for the
571 signature and again for transmission.
573 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
574 4.77 as the kernel support then wasn't solid, having issues in 64bit
575 mode. Now, it's been long enough. Add support for FreeBSD also.
577 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
578 case where the routing stage had gathered several addresses to send to
579 a host before calling the transport for the first, we previously failed
580 to close down TLS in the old transport process before passing the TCP
581 connection to the new process. The new one sent a STARTTLS command
582 which naturally failed, giving a failed delivery and bloating the retry
583 database. Investigation and fix prototype from Wolfgang Breyha.
585 JH/12 Fix check on SMTP command input synchronisation. Previously there were
586 false-negatives in the check that the sender had not preempted a response
587 or prompt from Exim (running as a server), due to that code's lack of
588 awareness of the SMTP input buffering.
590 PP/04 Add commandline_checks_require_admin option.
591 Exim drops privileges sanely, various checks such as -be aren't a
592 security problem, as long as you trust local users with access to their
593 own account. When invoked by services which pass untrusted data to
594 Exim, this might be an issue. Set this option in main configuration
595 AND make fixes to the calling application, such as using `--` to stop
598 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
599 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
600 responses to those, into a single TLS record each way (this usually means
601 a single packet). As a side issue, smtp_enforce_sync now works on TLS
604 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
605 affects you only if you're dancing at the edge of the param size limits.
606 If you are, and this message makes sense to you, then: raise the
607 configured limit or use OpenSSL 1.1. Nothing we can do for older
610 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
611 cmdline element to get the documented default one. Previously it was
614 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
615 are unsuable for non-message-specific reasons - eg. connection timeout,
616 banner-time rejection.
618 JH/16 Fix logging of delivery remote port, when specified by router, under
621 PP/06 Repair manualroute's ability to take options in any order, even if one
622 is the name of a transport.
625 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
627 JH/17 Change the list-building routines interface to use the expanding-string
628 triplet model, for better allocation and copying behaviour.
630 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
631 Previously it was constructed the first time a possibly-matching string
632 was met in the configuration file input during startup; now it is done
635 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
636 compatible one, to avoid the (poorly documented) possibility of a config
637 file in the working directory redirecting the DB files, possibly correpting
638 some existing file. CVE-2017-10140 assigned for BDB.
640 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
641 cache-hot. Previously, although the result was properly cached, the
642 initial verify call returned a defer.
644 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
645 the main verify for receipient in uncached-mode.
647 JH/22 Retire historical build files to an "unsupported" subdir. These are
648 defined as "ones for which we have no current evidence of testing".
650 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
651 if present. Previously it was ignored.
653 JH/24 Start using specified-initialisers in C structure init coding. This is
654 a C99 feature (it's 2017, so now considered safe).
656 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
657 if was a fixed-sized field and bitmask ops via macros; it is now more
660 PP/07 GitHub PR 56: Apply MariaDB build fix.
661 Patch provided by Jaroslav Škarvada.
663 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
664 during Coverity cleanups [4.87 JH/47]
665 Diagnosis and fix provided by Michael Fischer v. Mollard.
667 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
668 the right size to place the terminating semicolon on its own folded
669 line, the header hash was calculated to an incorrect value thanks to
670 the (relaxed) space the fold became.
672 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
673 and confused the parent.
675 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
676 which could crash as a result. This could lead to undeliverable messages.
678 JH/28 Logging: "next input sent too soon" now shows where input was truncated
681 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
682 matters on fast-turnover and PID-randomising systems, which were getting
683 out-of-order delivery.
685 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
686 a possibly-overlapping copy. The symptom was that "Remote host closed
687 connection in response to HELO" was logged instead of the actual 4xx
690 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
691 Previously only that bufferd was discarded, resulting in SYMTP command
694 JH/32 DKIM: when a message has multiple signatures matching an identity given
695 in dkim_verify_signers, run the dkim acl once for each. Previously only
696 one run was done. Bug 2189.
698 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
699 "panic the current process" to "deliberately defer". The panic log is
700 still written with the problem list name; the mail and reject logs now
701 get a temp-reject line for the message that was being handled, saying
702 something like "domains check lookup or other defer". The SMTP 451
703 message is still "Temporary local problem".
705 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
706 A crafted sequence of BDAT commands could result in in-use memory beeing
707 freed. CVE-2017-16943.
709 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
710 from SMTP input. Previously it was always done; now only done for DATA
711 and not BDAT commands. CVE-2017-16944.
713 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
714 to the message (such as an overlong header line). Previously this was
715 not done and we did not exit BDAT mode. Followon from the previous item
716 though a different problem.
722 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
723 than -2003 did; needs libidn2 in addition to libidn.
725 JH/02 The path option on a pipe transport is now expanded before use.
727 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
728 Patch provided by "Björn", documentation fix added too.
730 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
731 missing a wire-to-host endian conversion.
733 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
734 close after a BDAT command line could be taken as a following command,
735 giving a synch failure. Fix by only checking for synch immediately
736 before acknowledging the chunk.
738 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
739 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
740 macro. Patches provided by Josh Soref.
742 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
743 Previously we did not; the RFC seems ambiguous and VRFY is not listed
744 by IANA as a service extension. However, John Klensin suggests that we
747 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
748 the dkim code may be unix-mode line endings rather than smtp wire-format
749 CRLF, so prepend a CR to any bare LF.
751 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
752 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
754 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
755 the first were themselves being wrongly included in the feed into dkim
756 processing; with most chunk sizes in use this resulted in an incorrect
757 body hash calculated value.
759 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
760 DKIM signature block, for verification. Although advised against by
761 standards it is specifically not ruled illegal.
763 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
765 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
766 missing a body hash (the bh= tag).
768 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
769 It seems that HAProxy sends the Proxy Protocol information in clear and
770 only then does a TLS startup, so do the same.
772 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
773 TCP connections (such as for Spamd) unless the daemon successfully set
774 Fast Open mode on its listening sockets. This fixes breakage seen on
775 too-old kernels or those not configured for Fast Open, at the cost of
776 requiring both directions being enabled for TFO, and TFO never being used
777 by non-daemon-related Exim processes.
779 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
780 endings, at least on the first header line. Try to canonify any that get
781 past that check, despite the cost.
783 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
784 now limited to an arbitrary five deep, while parsing addresses with the
785 strip_excess_angle_brackets option enabled.
787 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
788 instead leave the unprompted TLS handshake in socket buffer for the
789 TLS library to consume.
791 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
793 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
795 JH/16 Drop variables when they go out of scope. Memory management drops a whole
796 region in one operation, for speed, and this leaves assigned pointers
797 dangling. Add checks run only under the testsuite which checks all
798 variables at a store-reset and panics on a dangling pointer; add code
799 explicitly nulling out all the variables discovered. Fixes one known
800 bug: a transport crash, where a dangling pointer for $sending_ip_address
801 originally assigned in a verify callout, is re-used.
803 PP/06 Drop '.' from @INC in various Perl scripts.
805 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
807 PP/08 Reduce a number of compilation warnings under clang; building with
808 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
809 should be warning-free.
811 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
813 HS/01 Fix portability problems introduced by PP/08 for platforms where
814 realloc(NULL) is not equivalent to malloc() [SunOS et al].
816 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
817 chunk. This allows us to accept broken chunked messages. We need a more
818 general solution here.
820 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
821 already-broken messages in the queue.
823 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
825 JH/19 Fix reference counting bug in routing-generated-address tracking.
831 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
832 supports it and a size is available (ie. the sending peer gave us one).
834 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
835 years of being deprecated). The replacements are the ACLs
836 acl_smtp_mime and acl_not_smtp_mime.
838 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
839 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
840 or even an in-clear connection were permitted. Now, if the host lookup
841 was dnssec and dane was requested then the host is only used if the
842 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
843 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
844 if one fails this test.
845 This means that a poorly-configured remote DNS will make it incommunicado;
846 but it protects against a DNS-interception attack on it.
848 JH/04 Bug 1810: make continued-use of an open smtp transport connection
849 non-noisy when a race steals the message being considered.
851 JH/05 If main configuration option tls_certificate is unset, generate a
852 self-signed certificate for inbound TLS connections.
854 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
855 in rewrites and routers.
857 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
858 and logged a warning sing 4.83; now they are a configuration file error.
860 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
861 (lacking @domain). Apply the same qualification processing as RCPT.
863 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
865 JH/10 Support ${sha256:} applied to a string (as well as the previous
868 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
869 a cutthrough deliver is pending, as we always want to make a connection.
870 This also avoids re-routing the message when later placing the cutthrough
871 connection after a verify cache hit.
872 Do not update it with the verify result either.
874 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
875 when routing results in more than one destination address.
877 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
878 signing (which inhibits the cutthrough capability). Previously only
879 the presence of an option was tested; now an expansion evaluating as
880 empty is permissible (obviously it should depend only on data available
881 when the cutthrough connection is made).
883 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
884 the relevant preceding SMTP command did not note the pipelining mode.
886 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
887 Previously they were not counted.
889 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
890 as one having no matching records. Previously we deferred the message
891 that needed the lookup.
893 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
894 distinguished as "(=".
896 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
897 for missing MX records. Previously it only worked for missing A records.
899 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
901 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
902 after the data-go-ahead and data-ack. Patch from Jason Betts.
904 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
905 even for a "none" policy. Patch from Tony Meyer.
907 JH/22 Fix continued use of a connection for further deliveries. If a port was
908 specified by a router, it must also match for the delivery to be
911 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
912 When one of the recipients of a message was unsuitable for the connection
913 (has no matching addresses), we lost track of needing to mark it
914 deferred. As a result mail would be lost.
916 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
918 JH/25 Decoding ACL controls is now done using a binary search; the source code
919 takes up less space and should be simpler to maintain. Merge the ACL
920 condition decode tables also, with similar effect.
922 JH/26 Fix problem with one_time used on a redirect router which returned the
923 parent address unchanged. A retry would see the parent address marked as
924 delivered, so not attempt the (identical) child. As a result mail would
927 JH/27 Fix a possible security hole, wherein a process operating with the Exim
928 UID can gain a root shell. Credit to http://www.halfdog.net/ for
929 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
932 JH/28 Enable {spool,log} filesystem space and inode checks as default.
933 Main config options check_{log,spool}_{inodes,space} are now
934 100 inodes, 10MB unless set otherwise in the configuration.
936 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
937 Previously it only applied to the main-section connection policy
940 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
942 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
943 by me. Added RFC7919 DH primes as an alternative.
945 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
946 are not in the system include path.
948 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
949 GnuTLS, when a session startup failed (eg because the client disconnected)
950 Exim did stdio operations after fclose. This was exposed by a recent
951 change which nulled out the file handle after the fclose.
953 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
954 signed directly by the cert-signing cert, rather than an intermediate
955 OCSP-signing cert. This is the model used by LetsEncrypt.
957 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
959 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
960 an incoming connection.
962 HS/02 Bug 1802: Do not half-close the connection after sending a request
965 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
966 fallback to "prime256v1".
968 JH/34 SECURITY: Use proper copy of DATA command in error message.
969 Could leak key material. Remotely exploitable. CVE-2016-9963.
975 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
976 and 3.4.4 - once the server is enabled to respond to an OCSP request
977 it does even when not requested, resulting in a stapling non-aware
978 client dropping the TLS connection.
980 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
981 support variable-length bit vectors. No functional change.
983 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
984 The I= interface field on outgoing lines is now after the H= remote
985 host field, same as incoming lines. There is a separate
986 outgoing_interface log selector which allows you to disable the
989 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
990 If not running log_selector +smtp_connection the mainlog would be held
991 open indefinitely after a "too many connections" event, including to a
992 deleted file after a log rotate. Leave the per net connection logging
993 leaving it open for efficiency as that will be quickly detected by the
994 check on the next write.
996 HS/01 Bug 1671: Fix post transport crash.
997 Processing the wait-<transport> messages could crash the delivery
998 process if the message IDs didn't exist for some reason. When
999 using 'split_spool_directory=yes' the construction of the spool
1000 file name failed already, exposing the same netto behaviour.
1002 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1003 mime_regex ACL conditions.
1005 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1006 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1007 to HELO, local diagnostic string.
1009 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1010 log line to debug. Even when configured with a tls authenticator many
1011 client connections are expected to not authenticate in this way, so
1012 an authenticate fail is not an error.
1014 HS/02 Add the Exim version string to the process info. This way exiwhat
1015 gives some more detail about the running daemon.
1017 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1018 matter for fast-change records such as DNSBLs.
1020 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1021 retry record, even if constant. There may be multiple transports with
1022 different interface settings and the retry behaviour needs to be kept
1025 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1027 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1029 JH/10 Bug 840: fix log_defer_output option of pipe transport
1031 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1032 hosts_randomize. This matters a lot when combined with mua_wrapper.
1034 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1035 ${quote_pgsql:<string>} operator.
1037 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1039 JH/14 Change header file name for freeradius-client. Relevant if compiling
1040 with Radius support; from the Gentoo tree and checked under Fedora.
1042 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1044 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1045 option transport_filter, meaning no filtering.
1047 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1049 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1050 defaults to "*" (all hosts). The variable is now available when not built
1051 with TLS, default unset, mainly to enable keeping the testsuite sane.
1052 If a server certificate is not supplied (via tls_certificate) an error is
1053 logged, and clients will find TLS connections fail on startup. Presumably
1054 they will retry in-clear.
1055 Packagers of Exim are strongly encouraged to create a server certificate
1056 at installation time.
1058 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1059 with the $config_file variable.
1061 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1062 in transport context, after the attempt, and per-recipient. The latter type
1063 is per host attempted. The event data is the error message, and the errno
1064 information encodes the lookup type (A vs. MX) used for the (first) host,
1065 and the trailing two digits of the smtp 4xx response.
1067 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1068 to write to mainlog (or rejectlog, paniclog) in the window between file
1069 creation and permissions/ownership being changed. Particularly affects
1070 installations where exicyclog is run as root, rather than exim user;
1071 result is that the running daemon panics and dies.
1073 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1075 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1076 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1077 "pri" and "weight". Note that the previous implicit priority given by the
1078 list order is no longer honoured.
1080 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1081 for DKIM processing.
1083 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1084 by defining SUPPORT_SOCKS.
1086 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1087 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1088 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1089 variables are renamed to proxy_{local,external}_{address,port}.
1091 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1092 for a build by defining SUPPORT_I18N
1094 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1095 of the query string, and make ${quote_redis:} do that quoting.
1097 JH/29 Move Events support from Experimental to mainline, enabled by default
1098 and removable for a build by defining DISABLE_EVENT.
1100 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1102 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1103 cached by the daemon.
1105 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1106 by defining LOOKUP_REDIS. The libhiredis library is required.
1108 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1109 keys are given for lookup.
1111 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1112 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1113 only supported when built with TLS support. The PolarSSL SHA routines
1114 are still used when the TLS library is too old for convenient support.
1116 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1117 openssl_options), for security. OpenSSL forces this from version 1.1.0
1118 server-side so match that on older versions.
1120 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1121 allocation for $value could be released as the expansion processing
1122 concluded, but leaving the global pointer active for it.
1124 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1125 and to use the domains and local_parts ACL conditions.
1127 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1128 incorrectly not doubled on cutthrough transmission, hence seen as a
1129 body-termination at the receiving system - resulting in truncated mails.
1130 Commonly the sender saw a TCP-level error, and retransmitted the message
1131 via the normal store-and-forward channel. This could result in duplicates
1132 received - but deduplicating mailstores were liable to retain only the
1133 initial truncated version.
1135 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1137 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1139 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1140 we're in there, support oversigning also; bug 1309.
1142 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1144 HS/04 Add support for keep_environment and add_environment options.
1146 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1147 either intentional arithmetic overflow during PRNG, or testing config-
1150 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1151 delivery resulted in actual delivery. Cancel cutthrough before DATA
1154 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1155 rejects a recipient: pass the reject to the originator.
1157 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1158 Many were false-positives and ignorable, but it's worth fixing the
1161 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1162 for the new environment-manipulation done at startup. Move the routines
1163 from being local to tls.c to being global via the os.c file.
1165 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1166 an extract embedded as result-arg for a map, the first arg for extract
1167 is unavailable so we cannot tell if this is a numbered or keyed
1168 extraction. Accept either.
1174 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1177 JH/02 The smtp transport option "multi_domain" is now expanded.
1179 JH/03 The smtp transport now requests PRDR by default, if the server offers
1182 JH/04 Certificate name checking on server certificates, when exim is a client,
1183 is now done by default. The transport option tls_verify_cert_hostnames
1184 can be used to disable this per-host. The build option
1185 EXPERIMENTAL_CERTNAMES is withdrawn.
1187 JH/05 The value of the tls_verify_certificates smtp transport and main options
1188 default to the word "system" to access the system default CA bundle.
1189 For GnuTLS, only version 3.0.20 or later.
1191 JH/06 Verification of the server certificate for a TLS connection is now tried
1192 (but not required) by default. The verification status is now logged by
1193 default, for both outbound TLS and client-certificate supplying inbound
1196 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1199 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1200 Status Notification (bounce) messages are now MIME format per RFC 3464.
1201 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1202 under the control of the dsn_advertise_hosts option, and routers may
1203 have a dsn_lasthop option.
1205 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1206 default, modifiable by a malware= option. The list separator for
1207 the options can now be changed in the usual way. Bug 68.
1209 JH/10 The smtp_receive_timeout main option is now expanded before use.
1211 JH/11 The incoming_interface log option now also enables logging of the
1212 local interface on delivery outgoing connections.
1214 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1215 if the interface and destination host and port all match.
1217 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1220 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1221 Patch from Andrew Lewis.
1223 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1224 now supports optional time-restrictions, weighting, and priority
1225 modifiers per server. Patch originally by <rommer@active.by>.
1227 JH/16 The spamd_address main option now supports a mixed list of local
1228 and remote servers. Remote servers can be IPv6 addresses, and
1229 specify a port-range.
1231 JH/17 Bug 68: The spamd_address main option now supports an optional
1232 timeout value per server.
1234 JH/18 Bug 1581: Router and transport options headers_add/remove can
1235 now have the list separator specified.
1237 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1240 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1243 JH/21 Support for the A6 type of dns record is withdrawn.
1245 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1246 rather than the verbs used.
1248 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1249 from 255 to 1024 chars.
1251 JH/24 Verification callouts now attempt to use TLS by default.
1253 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1254 are generic router options now. The defaults didn't change.
1256 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1257 Original patch from Alexander Shikoff, worked over by JH.
1259 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1260 files if ZCAT_COMMAND is not executable.
1262 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1264 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1266 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1267 Normally benign, it bites when the pair was led to by a CNAME;
1268 modern usage is to not canonicalize the domain to a CNAME target
1269 (and we were inconsistent anyway for A-only vs AAAA+A).
1271 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1273 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1274 when evaluating $sender_host_dnssec.
1276 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1277 $sender_helo_dnssec variable.
1279 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1281 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1283 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1285 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1286 documented as working, but never had. Support all but $spam_report.
1288 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1289 added for tls authenticator.
1291 HS/03 Add perl_taintmode main config option
1297 TL/01 When running the test suite, the README says that variables such as
1298 no_msglog_check are global and can be placed anywhere in a specific
1299 test's script, however it was observed that placement needed to be near
1300 the beginning for it to behave that way. Changed the runtest perl
1301 script to read through the entire script once to detect and set these
1302 variables, reset to the beginning of the script, and then run through
1303 the script parsing/test process like normal.
1305 TL/02 The BSD's have an arc4random API. One of the functions to induce
1306 adding randomness was arc4random_stir(), but it has been removed in
1307 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1308 function when detected.
1310 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1311 cause callback expansion.
1313 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1314 syntax errors in an expansion can be treated as a string instead of
1315 logging or causing an error, due to the internal use of bool_lax
1316 instead of bool when processing it.
1318 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1319 server certificates when making smtp deliveries.
1321 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1323 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1325 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1327 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1328 Merged patch from Sebastian Wiedenroth.
1330 JH/05 Fix results-pipe from transport process. Several recipients, combined
1331 with certificate use, exposed issues where response data items split
1332 over buffer boundaries were not parsed properly. This eventually
1333 resulted in duplicates being sent. This issue only became common enough
1334 to notice due to the introduction of connection certificate information,
1335 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1337 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1338 size buffer was used, resulting in syntax errors when an expansion
1341 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1342 version 3.3.6 or later.
1344 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1345 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1346 both become "event_action", the variables become $event_name, $event_data
1347 and $event_defer_errno. There is a new variable $verify_mode, usable in
1348 routers, transports and related events. The tls:cert event is now also
1349 raised for inbound connections, if the main configuration event_action
1352 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1353 early OCSP support, but no stapling (appears to be less than 1.0.0).
1355 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1356 server certificate names available under the smtp transport option
1357 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1360 JH/10 Time-related extraction expansions from certificates now use the main
1361 option "timezone" setting for output formatting, and are consistent
1362 between OpenSSL and GnuTLS compilations. Bug 1541.
1364 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1365 encoded parameter in the incoming message. Bug 1558.
1367 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1368 include certificate info, eximon was claiming there were spoolfile
1371 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1373 JH/14 Log delivery-related information more consistently, using the sequence
1374 "H=<name> [<ip>]" wherever possible.
1376 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1377 are problematic for Debian distribution, omit them from the release
1380 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1382 JH/16 Fix string representation of time values on 64bit time_t architectures.
1385 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1386 output list separator was used.
1391 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1392 checkers that were complaining about end of non-void function with no
1395 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1396 This was a regression introduced in 4.83 by another bugfix.
1398 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1400 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1401 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1407 TF/01 Correctly close the server side of TLS when forking for delivery.
1409 When a message was received over SMTP with TLS, Exim failed to clear up
1410 the incoming connection properly after forking off the child process to
1411 deliver the message. In some situations the subsequent outgoing
1412 delivery connection happened to have the same fd number as the incoming
1413 connection previously had. Exim would try to use TLS and fail, logging
1414 a "Bad file descriptor" error.
1416 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1417 utilities have not been installed.
1419 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1420 temporary space as the ACL may create new global variables.
1422 TL/01 LDAP support uses per connection or global context settings, depending
1423 upon the detected version of the libraries at build time.
1425 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1426 to extract and use the src ip:port in logging and expansions as if it
1427 were a direct connection from the outside internet. PPv2 support was
1428 updated based on HAProxy spec change in May 2014.
1430 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1432 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1433 Properly escape header and check for NULL return.
1435 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1438 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1440 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1441 characters in header names, implemented as a verify condition.
1442 Contributed by Michael Fischer v. Mollard.
1444 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1445 results permerror and temperror. Previous values are deprecated but
1446 still accepted. In a future release, err_perm and err_temp will be
1447 completely removed, which will be a backward incompatibility if the
1448 ACL tests for either of these two old results. Patch contributed by
1449 user bes-internal on the mailing list.
1451 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1453 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1454 selectors, in both main and reject logs.
1456 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1459 JH/07 Add malware type "sock" for talking to simple daemon.
1461 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1463 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1464 routers/transports under cutthrough routing.
1466 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1467 numbers. Touch up "bool" conditional to keep the same definition.
1469 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1471 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1473 JH/12 Expand items in router/transport headers_add or headers_remove lists
1474 individually rather than the list as a whole. Bug 1452.
1476 Required for reasonable handling of multiple headers_ options when
1477 they may be empty; requires that headers_remove items with embedded
1478 colons must have them doubled (or the list-separator changed).
1480 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1481 view the policy declared in the DMARC record. Currently, $dmarc_status
1482 is a combined value of both the record presence and the result of the
1485 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1487 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1488 dnslookup router and the smtp transport (applying to the forward
1491 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1492 of ldap servers used for a specific lookup. Patch provided by Heiko
1495 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1496 New variable $lookup_dnssec_authenticated for observability.
1498 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1499 Patch submitted by Lars Timman.
1501 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1503 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1504 Requires trusted mode and valid format message id, aborts otherwise.
1505 Patch contributed by Heiko Schlichting.
1507 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1508 certextract with support for various fields. Bug 1358.
1510 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1511 is requested by default, modifiable by smtp transport option
1514 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1515 operate on certificate variables to give certificate fingerprints
1516 Also new ${sha256:cert_variable}.
1518 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1520 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1521 Christian Aistleitner.
1523 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1525 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1526 file. Patch from Wolfgang Breyha.
1528 JH/25 Expand the coverage of the delivery $host and $host_address to
1529 client authenticators run in verify callout. Bug 1476.
1531 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1532 align with daemon_smtp_ports. Bug 72.
1534 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1535 support and error reporting did not work properly.
1537 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1538 and is readable. Patch from Andrew Colin Kissa.
1540 TL/14 Enhance documentation of ${run expansion and how it parses the
1541 commandline after expansion, particularly in the case when an
1542 unquoted variable expansion results in an empty value.
1544 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1546 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1547 by renaming away from it. Addresses GH issue 15, reported by
1550 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1552 TL/15 SECURITY: prevent double expansion in math comparison functions
1553 (can expand unsanitized data). Not remotely exploitable.
1560 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1562 PP/02 Make -n do something, by making it not do something.
1563 When combined with -bP, the name of an option is not output.
1565 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1568 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1569 $sender_host_name and config options to manage this, and basic check
1572 PP/05 DSCP support for outbound connections and control modifier for inbound.
1574 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1575 (Only plugin which currently uses this is kerberos4, which nobody should
1576 be using, but we should make it available and other future plugins might
1577 conceivably use it, even though it would break NAT; stuff *should* be
1578 using channel bindings instead).
1580 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1581 name; added for Sendmail compatibility; requires admin caller.
1582 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1583 just ignore it); requires trusted caller.
1584 Also parse but ignore: -Ac -Am -X<logfile>
1587 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1589 TL/02 Add +smtp_confirmation as a default logging option.
1591 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1592 Patch by Magnus Holmgren from 2007-02-20.
1594 TL/04 Bugzilla 1281 - Spec typo.
1595 Bugzilla 1283 - Spec typo.
1596 Bugzilla 1290 - Spec grammar fixes.
1598 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1600 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1602 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1603 mailing list by by Dmitry Isaikin.
1605 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1607 JH/02 Support "G" suffix to numbers in ${if comparisons.
1609 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1611 NM/01 Bugzilla 1197 - Spec typo
1612 Bugzilla 1196 - Spec examples corrections
1614 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1616 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1617 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1620 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1621 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1623 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1624 "acl {{name}{arg}...}", and optional args on acl condition
1627 JH/05 Permit multiple router/transport headers_add/remove lines.
1629 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1631 JH/07 Avoid using a waiting database for a single-message-only transport.
1632 Performance patch from Paul Fisher. Bugzilla 1262.
1634 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1637 JH/09 Add $headers_added variable, with content from use of ACL modifier
1638 add_header (but not yet added to the message). Bugzilla 199.
1640 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1641 Pulled from Bugzilla 817 by Wolfgang Breyha.
1643 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1645 (nb: this is the same fix as in Exim 4.80.1)
1647 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1650 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1653 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1655 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1656 advertise SMTP AUTH mechanism to us, instead of a generic
1657 protocol violation error. Also, make Exim more robust to bad
1658 data from the Dovecot auth socket.
1660 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1662 When a queue runner is handling a message, Exim first routes the
1663 recipient addresses, during which it prunes them based on the retry
1664 hints database. After that it attempts to deliver the message to
1665 any remaining recipients. It then updates the hints database using
1668 So if a recipient address works intermittently, it can get repeatedly
1669 deferred at routing time. The retry hints record remains fresh so the
1670 address never reaches the final cutoff time.
1672 This is a fairly common occurrence when a user is bumping up against
1673 their storage quota. Exim had some logic in its local delivery code
1674 to deal with this. However it did not apply to per-recipient defers
1675 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1677 This change adds a proper retry rule check during routing so that the
1678 final cutoff time is checked against the message's age. We only do
1679 this check if there is an address retry record and there is not a
1680 domain retry record; this implies that previous attempts to handle
1681 the address had the retry_use_local_parts option turned on. We use
1682 this as an approximation for the destination being like a local
1683 delivery, as in LMTP.
1685 I suspect this new check makes the old local delivery cutoff check
1686 redundant, but I have not verified this so I left the code in place.
1688 TF/02 Correct gecos expansion when From: is a prefix of the username.
1690 Test 0254 submits a message to Exim with the header
1694 When I ran the test suite under the user fanf2, Exim expanded
1695 the header to contain my full name, whereas it should have added
1696 a Resent-Sender: header. It erroneously treats any prefix of the
1697 username as equal to the username.
1699 This change corrects that bug.
1701 GF/01 DCC debug and logging tidyup
1702 Error conditions log to paniclog rather than rejectlog.
1703 Debug lines prefixed by "DCC: " to remove any ambiguity.
1705 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1707 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1708 Bug spotted by Jeremy Harris; was flawed since initial commit.
1709 Would have resulted in OCSP responses post-SNI triggering an Exim
1710 NULL dereference and crash.
1712 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1714 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1715 Bug detection, analysis and fix by Samuel Thibault.
1716 Bugzilla 1331, Debian bug #698092.
1718 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1720 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1721 Server implementation by Todd Lyons, client by JH.
1722 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1723 config variable "prdr_enable" controls whether the server
1724 advertises the facility. If the client requests PRDR a new
1725 acl_data_smtp_prdr ACL is called once for each recipient, after
1726 the body content is received and before the acl_smtp_data ACL.
1727 The client is controlled by both of: a hosts_try_prdr option
1728 on the smtp transport, and the server advertisement.
1729 Default client logging of deliveries and rejections involving
1730 PRDR are flagged with the string "PRDR".
1732 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1733 fclose(). Diagnosis by Todd Lyons.
1735 PP/17 Update configure.default to handle IPv6 localhost better.
1736 Patch by Alain Williams (plus minor tweaks).
1739 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1740 This is now consistent with GnuTLS, and is now documented: the
1741 previous undocumented portable approach to treating the option as
1742 unset was to force an expansion failure. That still works, and
1743 an empty string is now equivalent.
1745 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1746 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1747 not performing validation itself.
1749 PP/20 Added force_command boolean option to pipe transport.
1750 Patch from Nick Koston, of cPanel Inc.
1752 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1755 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1757 PP/21 Fix eximon continuous updating with timestamped log-files.
1758 Broken in a format-string cleanup in 4.80, missed when I repaired the
1759 other false fix of the same issue.
1760 Report and fix from Heiko Schlichting.
1763 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1764 Report from Prashanth Katuri.
1766 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1767 It's SecureTransport, so affects any MacOS clients which use the
1768 system-integrated TLS libraries, including email clients.
1770 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1771 using a MIME ACL for non-SMTP local injection.
1772 Report and assistance in diagnosis by Warren Baker.
1774 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1776 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1778 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1779 last id that failed so it may be referenced in subsequent ACL's.
1781 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1784 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1785 ldap library initialization, allowing self-signed CA's to be
1786 used. Also properly sets require_cert option later in code by
1787 using NULL (global ldap config) instead of ldap handle (per
1788 session). Bug diagnosis and testing by alxgomz.
1790 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1791 the src/util/ subdirectory.
1793 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1794 renamed to Transport Post Delivery Action by Jeremy Harris, as
1797 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1798 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1799 redis_servers = needs to be configured which will be used by the redis
1800 lookup. Patch from Warren Baker, of The Packet Hub.
1802 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1804 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1805 hostname or reverse DNS when processing a host list. Used suggestions
1806 from multiple comments on this bug.
1808 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1810 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1811 Missed a few lines, added it to make the runtest require no keyboard
1814 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1815 contains upper case chars. Make router use caseful_local_part.
1817 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1818 support when GnuTLS has been built with p11-kit.
1824 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1826 This, or similar/improved, will also be change PP/11 of 4.82.
1832 PP/01 Handle short writes when writing local log-files.
1833 In practice, only affects FreeBSD (8 onwards).
1834 Bugzilla 1053, with thanks to Dmitry Isaikin.
1836 NM/01 Bugzilla 949 - Documentation tweak
1838 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1841 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1843 PP/02 Implemented gsasl authenticator.
1845 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1847 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1848 `pkg-config foo` for cflags/libs.
1850 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1851 with rest of GSASL and with heimdal_gssapi.
1853 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1854 `pkg-config foo` for cflags/libs for the TLS implementation.
1856 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1857 properties get this fed in as external SSF. A number of robustness
1858 and debugging improvements to the cyrus_sasl authenticator.
1860 PP/08 cyrus_sasl server now expands the server_realm option.
1862 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1863 Patch by Jeremy Harris.
1865 PP/10 Added dbmjz lookup type.
1867 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1869 PP/12 MAIL args handles TAB as well as SP, for better interop with
1870 non-compliant senders.
1871 Analysis and variant patch by Todd Lyons.
1873 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1874 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1875 Patch from Dirk Mueller <dmueller@suse.com>
1877 PP/13 tls_peerdn now print-escaped for spool files.
1878 Observed some $tls_peerdn in wild which contained \n, which resulted
1879 in spool file corruption.
1881 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1882 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1883 or write after TLS renegotiation, which otherwise led to messages
1886 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1887 as a tracking header (ie: a signed header comes before the signature).
1888 Patch from Wolfgang Breyha.
1890 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1891 comma-sep list; embedded commas doubled.
1893 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1895 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1897 Report and patch from Dmitry Banschikov.
1899 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1900 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1901 failures. We appear to now support TLS1.1+ with Exim.
1903 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1904 lets Exim select keys and certificates based upon TLS SNI from client.
1905 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1906 before an outbound SMTP session. New log_selector, +tls_sni.
1908 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1909 NULL dereference. Report and patch from Alun Jones.
1911 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1912 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1913 Not seeing resolver debug output on NetBSD, but suspect this is a
1914 resolver implementation change.
1916 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1917 Left warnings. Added "eximon gdb" invocation mode.
1919 PP/21 Defaulting "accept_8bitmime" to true, not false.
1921 PP/22 Added -bw for inetd wait mode support.
1923 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1924 locate the relevant includes and libraries. Made this the default.
1926 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1927 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1929 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1930 This may cause build issues on older platforms.
1932 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1933 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1934 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1935 Added SNI support via GnuTLS too.
1936 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1938 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1940 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1941 Applied second patch from Janne, implementing suggestion to default
1942 multiple-strings-in-record handling to match SPF spec.
1944 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1946 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1947 read-only, out of scope).
1948 Patch from Wolfgang Breyha, report from Stuart Northfield.
1950 PP/29 Fix three issues highlighted by clang analyser static analysis.
1951 Only crash-plausible issue would require the Cambridge-specific
1952 iplookup router and a misconfiguration.
1953 Report from Marcin Mirosław.
1955 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1957 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1958 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1959 As part of this, removing so much warning spew let me fix some minor
1960 real issues in debug logging.
1962 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1963 assignment on my part. Fixed.
1965 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1966 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1967 Janne Snabb (who went above and beyond: thank you).
1969 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1970 string otherwise requires a connection and a bunch more work and it's
1971 relatively easy to get wrong. Should also expose TLS library linkage
1974 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1975 64-bit ${eval} (JH/03).
1977 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1978 GNU libc to support some of the 64-bit stuff, should not lead to
1979 conflicts. Defined before os.h is pulled in, so if a given platform
1980 needs to override this, it can.
1982 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1983 protection layer was required, which is not implemented.
1984 Bugzilla 1254, patch from Wolfgang Breyha.
1986 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1987 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1988 tls_dhparam take prime identifiers. Also unbreak combination of
1989 OpenSSL+DH_params+TLSSNI.
1991 PP/39 Disable SSLv2 by default in OpenSSL support.
1997 PP/01 Solaris build fix for Oracle's LDAP libraries.
1998 Bugzilla 1109, patch from Stephen Usher.
2000 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2002 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2005 TF/02 Fix a couple more cases where we did not log the error message
2006 when unlink() failed. See also change 4.74-TF/03.
2008 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2009 lock up or crash if it happened to be inside a call to libc when it
2010 got a SIGUSR1 from exiwhat.
2012 The SIGUSR1 handler appends the current process status to the process
2013 log which is later printed by exiwhat. It used to use the general
2014 purpose logging code to do this, but several functions it calls are
2015 not safe for signals.
2017 The new output code in the SIGUSR1 handler is specific to the process
2018 log, and simple enough that it's easy to inspect for signal safety.
2019 Removing some special cases also simplifies the general logging code.
2020 Removing the spurious timestamps from the process log simplifies
2023 TF/04 Improved ratelimit ACL condition.
2025 The /noupdate option has been deprecated in favour of /readonly which
2026 has clearer semantics. The /leaky, /strict, and /readonly update modes
2027 are mutually exclusive. The update mode is no longer included in the
2028 database key; it just determines when the database is updated. (This
2029 means that when you upgrade Exim will forget old rate measurements.)
2031 Exim now checks that the per_* options are used with an update mode that
2032 makes sense for the current ACL. For example, when Exim is processing a
2033 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2034 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2035 must specify per_mail/readonly. If you omit the update mode it defaults to
2036 /leaky where that makes sense (as before) or /readonly where required.
2038 The /noupdate option is now undocumented but still supported for
2039 backwards compatibility. It is equivalent to /readonly except that in
2040 ACLs where /readonly is required you may specify /leaky/noupdate or
2041 /strict/noupdate which are treated the same as /readonly.
2043 A useful new feature is the /count= option. This is a generalization
2044 of the per_byte option, so that you can measure the throughput of other
2045 aggregate values. For example, the per_byte option is now equivalent
2046 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2048 The per_rcpt option has been generalized using the /count= mechanism
2049 (though it's more complicated than the per_byte equivalence). When it is
2050 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2051 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2052 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2053 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2054 Note that using per_rcpt with a non-readonly update mode in more than
2055 one ACL will cause the recipients to be double-counted. (The per_mail
2056 and per_byte options don't have this problem.)
2058 The handling of very low rates has changed slightly. If the computed rate
2059 is less than the event's count (usually one) then this event is the first
2060 after a long gap. In this case the rate is set to the same as this event's
2061 count, so that the first message of a spam run is counted properly.
2063 The major new feature is a mechanism for counting the rate of unique
2064 events. The new per_addr option counts the number of different
2065 recipients that someone has sent messages to in the last time period. It
2066 behaves like per_rcpt if all the recipient addresses are different, but
2067 duplicate recipient addresses do not increase the measured rate. Like
2068 the /count= option this is a general mechanism, so the per_addr option
2069 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2070 example, measure the rate that a client uses different sender addresses
2071 with the options per_mail/unique=$sender_address. There are further
2072 details in the main documentation.
2074 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2076 TF/06 Removed a few PCRE remnants.
2078 TF/07 Automatically extract Exim's version number from tags in the git
2079 repository when doing development or release builds.
2081 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2082 Bugzilla 879. Patch from Paul Fisher.
2084 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2085 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2088 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2090 PP/05 Variable $av_failed, true if the AV scanner deferred.
2091 Bugzilla 1078. Patch from John Horne.
2093 PP/06 Stop make process more reliably on build failure.
2094 Bugzilla 1087. Patch from Heiko Schlittermann.
2096 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2097 Bugzilla 1089. Patch from Heiko Schlittermann.
2099 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2100 Bugzilla 1131. Patch from Holger Weiß.
2102 PP/09 Handle IPv6 addresses with SPF.
2103 Bugzilla 860. Patch from Wolfgang Breyha.
2105 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2107 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2110 PP/11 match_* no longer expand right-hand-side by default.
2111 New compile-time build option, EXPAND_LISTMATCH_RHS.
2112 New expansion conditions, "inlist", "inlisti".
2114 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2116 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2118 PP/14 fix log_write() format string regression from TF/03.
2119 Bugzilla 1152. Patch from Dmitry Isaikin.
2125 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2127 PP/02 Harmonised TLS library version reporting; only show if debugging.
2128 Layout now matches that introduced for other libraries in 4.74 PP/03.
2130 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2132 PP/04 New "dns_use_edns0" global option.
2134 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2137 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2138 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2140 TK/01 Updated PolarSSL code to 0.14.2.
2141 Bugzilla 1097. Patch from Andreas Metzler.
2143 PP/07 Catch divide-by-zero in ${eval:...}.
2144 Fixes bugzilla 1102.
2146 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2149 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2150 format-string attack -- SECURITY: remote arbitrary code execution.
2152 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2153 time unintentionally subject to list matching rules, letting the header
2154 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2155 arbitrary string expansion). This allowed for information disclosure.
2157 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2158 INT_MIN/-1 -- value coerced to INT_MAX.
2164 NM/01 Workaround for PCRE version dependency in version reporting
2167 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2168 This fixes portability to compilers other than gcc, notably
2169 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2171 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2172 makefiles for portability to HP-UX and POSIX correctness.
2174 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2175 Also via indented variable definition in the Makefile.
2176 (Debugging by Oliver Heesakkers).
2178 PP/02 Restore caching of spamd results with expanded spamd_address.
2179 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2181 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2182 Improves build reliability. Fix from: Frank Elsner
2184 NM/02 Fix wide character breakage in the rfc2047 coding
2185 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2187 NM/03 Allow underscore in dnslist lookups
2188 Fixes bug 1026. Patch from Graeme Fowler
2190 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2191 Code patches from Adam Ciarcinski of NetBSD.
2193 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2196 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2197 is logged, to avoid truncation. Patch from John Horne.
2199 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2200 Patch from Jakob Hirsch.
2202 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2203 SQL string expansion failure details.
2204 Patch from Andrey Oktyabrski.
2206 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2207 Patch from Simon Arlott.
2209 PP/09 New lookups functionality failed to compile on old gcc which rejects
2210 extern declarations in function scope.
2211 Patch from Oliver Fleischmann
2213 PP/10 Use sig_atomic_t for flags set from signal handlers.
2214 Check getgroups() return and improve debugging.
2215 Fixed developed for diagnosis in bug 927 (which turned out to be
2218 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2219 Patch from Mark Zealey.
2221 PP/12 Bugzilla 1056: Improved spamd server selection.
2222 Patch from Mark Zealey.
2224 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2225 Based on patch from Heiko Schlittermann.
2227 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2228 Patch from Uwe Doering, sign-off by Michael Haardt.
2230 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2231 variable declaration deep within a block. Bug and patch from
2234 PP/15 lookups-Makefile IRIX compatibility coercion.
2236 PP/16 Make DISABLE_DKIM build knob functional.
2238 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2239 Patch by Simon Arlott
2241 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2242 variable argument macros. Our copy now differs from upstream.
2248 TF/01 Failure to get a lock on a hints database can have serious
2249 consequences so log it to the panic log.
2251 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2252 controlled using the smtp_confirmation log selector.
2254 TF/03 Include the error message when we fail to unlink a spool file.
2256 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2257 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2258 for maintaining out-of-tree patches for some time.
2260 PP/01 Bugzilla 139: Documentation and portability issues.
2261 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2262 Handle per-OS dynamic-module compilation flags.
2264 PP/02 Let /dev/null have normal permissions.
2265 The 4.73 fixes were a little too stringent and complained about the
2266 permissions on /dev/null. Exempt it from some checks.
2267 Reported by Andreas M. Kirchwitz.
2269 PP/03 Report version information for many libraries, including
2270 Exim version information for dynamically loaded libraries. Created
2271 version.h, now support a version extension string for distributors
2272 who patch heavily. Dynamic module ABI change.
2274 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2275 privilege escalation vulnerability whereby the Exim run-time user
2276 can cause root to append content of the attacker's choosing to
2279 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2282 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2283 If dropping privileges for untrusted macros, we disabled normal logging
2284 on the basis that it would fail; for the Exim run-time user, this is not
2285 the case, and it resulted in successful deliveries going unlogged.
2286 Fixed. Reported by Andreas Metzler.
2292 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2293 only prepend for the Resent-* case. Fixes regression introduced in
2294 Exim 4.70 by NM/22 for Bugzilla 607.
2296 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2297 increasing numbers of administrators be bitten by this.
2299 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2301 PP/03 Bugzilla 994: added openssl_options main configuration option.
2303 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2305 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2307 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2309 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2310 without a peer certificate, leading to a segfault because of an
2311 assumption that peers always have certificates. Be a little more
2312 paranoid. Problem reported by Martin Tscholak.
2314 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2315 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2316 NB: ClamAV planning to remove STREAM in "middle of 2010".
2317 CL also introduces -bmalware, various -d+acl logging additions and
2318 more caution in buffer sizes.
2320 PP/09 Implemented reverse_ip expansion operator.
2322 PP/10 Bugzilla 937: provide a "debug" ACL control.
2324 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2326 PP/12 Bugzilla 973: Implement --version.
2328 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2330 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2332 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2334 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2335 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2336 ignore trailing whitespace.
2338 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2340 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2343 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2344 Notification from Dr Andrew Aitchison.
2346 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2347 ExtendedDetectionInfo response format.
2348 Notification from John Horne.
2350 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2353 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2354 XSL and documented dependency on system catalogs, with examples of how
2357 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2360 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2361 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2362 configuration file which is writeable by the Exim user or group.
2364 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2365 of configuration files to cover files specified with the -C option if
2366 they are going to be used with root privileges, not just the default
2369 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2370 option (effectively making it always true).
2372 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2373 files to be used while preserving root privileges.
2375 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2376 that rogue child processes cannot use them.
2378 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2379 run-time user, instead of root.
2381 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2382 Exim run-time user without dropping privileges.
2384 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2385 result string, instead of calling string_vformat() twice with the same
2388 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2389 for other users. Others should always drop root privileges if they use
2390 -C on the command line, even for a whitelisted configure file.
2392 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2394 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2400 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2401 $data_path, and $header_path variables; fixed documentation bugs and
2404 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2405 exipick to access non-standard spools, including the "frozen" queue
2408 NM/01 Bugzilla 965: Support mysql stored procedures.
2409 Patch from Alain Williams
2411 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2413 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2414 Patch from Andreas Metzler
2416 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2417 Patch from Kirill Miazine
2419 NM/05 Bugzilla 671: Added umask to procmail example.
2421 JJ/03 installed exipick 20100323.0, fixing doc bug
2423 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2424 directory. Notification and patch from Dan Rosenberg.
2426 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2428 TK/02 Improve log output when DKIM signing operation fails.
2430 MH/01 Treat the transport option dkim_domain as a colon separated
2431 list, not as a single string, and sign the message with each element,
2432 omitting multiple occurences of the same signer.
2434 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2435 Bugzilla 985, 986. Patch by Simon Arlott
2437 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2438 Patch by Simon Arlott
2440 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2441 MBX locking. Notification from Dan Rosenberg.
2447 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2449 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2451 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2453 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2455 NM/04 Bugzilla 915: Flag broken perl installation during build.
2461 TK/01 Added patch by Johannes Berg that expands the main option
2462 "spamd_address" if it starts with a dollar sign.
2464 TK/02 Write list of recipients to X-Envelope-Sender header when building
2465 the mbox-format spool file for content scanning (suggested by Jakob
2468 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2469 (http://www.dcc-servers.net/) support via dccifd. Activated by
2470 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2472 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2473 by Mark Daniel Reidel <mr@df.eu>.
2475 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2476 When building exim an external PCRE library is now needed -
2477 PCRE is a system library on the majority of modern systems.
2478 See entry on PCRE_LIBS in EDITME file.
2480 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2481 conversation. Added nologin parameter to request.
2482 Patch contributed by Kirill Miazine.
2484 TF/01 Do not log submission mode rewrites if they do not change the address.
2486 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2488 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2489 log files in place. Contributed by Roberto Lima.
2491 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2493 TF/03 Bugzilla 615: When checking the local_parts router precondition
2494 after a local_part_suffix or local_part_prefix option, Exim now
2495 does not use the address's named list lookup cache, since this
2496 contains cached lookups for the whole local part.
2498 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2499 Robert Millan. Documentation is in experimental-spec.txt.
2501 TF/04 Bugzilla 668: Fix parallel build (make -j).
2503 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2505 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2506 Patch provided by Jan Srzednicki.
2508 TF/05 Leading white space used to be stripped from $spam_report which
2509 wrecked the formatting. Now it is preserved.
2511 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2512 that they are available at delivery time.
2514 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2516 TF/08 TLS error reporting now respects the incoming_interface and
2517 incoming_port log selectors.
2519 TF/09 Produce a more useful error message if an SMTP transport's hosts
2520 setting expands to an empty string.
2522 NM/06 Bugzilla 744: EXPN did not work under TLS.
2523 Patch provided by Phil Pennock.
2525 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2526 Patch provided by Richard Godbee.
2528 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2529 acl_smtp_notquit, added index entry.
2531 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2532 Patch provided by Eugene Bujak.
2534 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2535 accept(). Patch provided by Maxim Dounin.
2537 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2538 Patch provided by Phil Pennock.
2540 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2542 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2543 Patch provided by Brad "anomie" Jorsch.
2545 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2546 Patch provided by Dean Brooks.
2548 TK/05 Add native DKIM support (does not depend on external libraries).
2550 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2551 Patch provided by Graeme Fowler.
2553 NM/16 Bugzilla 851: Documentation example syntax fix.
2555 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2557 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2560 NM/19 Bugzilla 745: TLS version reporting.
2561 Patch provided by Phil Pennock.
2563 NM/20 Bugzilla 167: bool: condition support.
2564 Patch provided by Phil Pennock.
2566 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2567 clients. Patch provided by Phil Pennock.
2569 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2570 Patch provided by Brad "anomie" Jorsch.
2572 NM/23 Bugzilla 687: Fix misparses in eximstats.
2573 Patch provided by Heiko Schlittermann.
2575 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2576 Patch provided by Heiko Schlittermann.
2578 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2579 plus update to original patch.
2581 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2583 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2584 Patch provided by David Brownlee.
2586 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2588 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2590 NM/30 Bugzilla 888: TLS documentation bugfixes.
2592 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2594 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2595 Unlike the original bugzilla I have changed all shell scripts in src tree.
2597 NM/33 Bugzilla 898: Transport filter timeout fix.
2598 Patch by Todd Rinaldo.
2600 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2601 Patch by Serge Demonchaux.
2603 NM/35 Bugzilla 39: Base64 decode bug fixes.
2604 Patch by Jakob Hirsch.
2606 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2608 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2610 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2612 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2618 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2619 ALT-N's libdkim that I have put here:
2620 http://duncanthrax.net/exim-experimental/
2622 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2623 were called 'true' and it seems that C99 defines that as a reserved
2624 keyword to be used with 'bool' variable types. That means you could
2625 not include C99-style headers which use bools without triggering
2626 build errors in sieve.c.
2628 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2629 as mailq or other aliases. Changed the --help handling significantly
2630 to do whats expected. exim_usage() emits usage/help information.
2632 SC/01 Added the -bylocaldomain option to eximstats.
2634 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2636 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2638 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2644 PH/01 Another patch from the Sieve maintainer.
2646 PH/02 When an IPv6 address is converted to a string for single-key lookup
2647 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2648 dots are used instead of colons so that keys in lsearch files need not
2649 contain colons. This was done some time before quoting was made available
2650 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2651 (notated using the quote facility) so as to distinguish them from IPv4
2652 keys. This meant that lookups for IP addresses in host lists did not work
2653 for iplsearch lookups.
2655 This has been fixed by arranging for IPv6 addresses to be expressed with
2656 colons if the lookup type is iplsearch. This is not incompatible, because
2657 previously such lookups could never work.
2659 The situation is now rather anomalous, since one *can* have colons in
2660 ordinary lsearch keys. However, making the change in all cases is
2661 incompatible and would probably break a number of configurations.
2663 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2666 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2667 conversion specification without a maximum field width, thereby enabling
2668 a rogue spamd server to cause a buffer overflow. While nobody in their
2669 right mind would setup Exim to query an untrusted spamd server, an
2670 attacker that gains access to a server running spamd could potentially
2671 exploit this vulnerability to run arbitrary code as the Exim user.
2673 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2674 $primary_hostname instead of what libspf2 thinks the hosts name is.
2676 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2677 a directory entry by the name of the lookup key. Previously, if a
2678 symlink pointed to a non-existing file or a file in a directory that
2679 Exim lacked permissions to read, a lookup for a key matching that
2680 symlink would fail. Now it is enough that a matching directory entry
2681 exists, symlink or not. (Bugzilla 503.)
2683 PH/03 The body_linecount and body_zerocount variables are now exported in the
2686 PH/04 Added the $dnslist_matched variable.
2688 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2689 This means they are set thereafter only if the connection becomes
2692 PH/06 Added the client_condition to authenticators so that some can be skipped
2693 by clients under certain conditions.
2695 PH/07 The error message for a badly-placed control=no_multiline_responses left
2696 "_responses" off the end of the name.
2698 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2700 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2701 (without spaces) instead of just copying the configuration text.
2703 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2705 PH/11 Added $max_received_linelength.
2707 PH/12 Added +ignore_defer and +include_defer to host lists.
2709 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2710 way in which PCRE > 7.0 is built.
2712 PH/14 Implemented queue_only_load_latch.
2714 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2715 MAIL command. The effect was to mangle the value on 64-bit systems.
2717 PH/16 Another patch from the Sieve maintainer.
2719 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2721 PH/18 If a system quota error occurred while trying to create the file for
2722 a maildir delivery, the message "Mailbox is full" was not appended to the
2723 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2724 only to a quota excession during the actual writing of the file.
2726 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2727 characters?) which causes problems in log lines. The DN values are now
2728 passed through string_printing() before being added to log lines.
2730 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2731 and InterBase are left for another time.)
2733 PH/21 Added message_body_newlines option.
2735 PH/22 Guard against possible overflow in moan_check_errorcopy().
2737 PH/23 POSIX allows open() to be a macro; guard against that.
2739 PH/24 If the recipient of an error message contained an @ in the local part
2740 (suitably quoted, of course), incorrect values were put in $domain and
2741 $local_part during the evaluation of errors_copy.
2747 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2748 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2751 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2752 issue a MAIL command.
2754 PH/02 In an ACL statement such as
2756 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2758 if a client was not listed at all, or was listed with a value other than
2759 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2760 the condition was not true (as it should be), so access was not denied.
2761 The bug was that the ! inversion was incorrectly passed on to the second
2762 item. This has been fixed.
2764 PH/03 Added additional dnslists conditions == and =& which are different from
2765 = and & when the dns lookup returns more than one IP address.
2767 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2768 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2770 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2771 FSYNC, which compiles an option called disable_fsync that allows for
2772 bypassing fsync(). The documentation is heavily laced with warnings.
2774 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2776 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2777 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2778 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2779 including adding "make clean"; (3) Added -fPIC when compiling the test
2780 dynamically loaded module, to get rid of a warning.
2782 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2783 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2784 = 0s. The bug is otherwise harmless.
2786 PH/07 There was a bug in the dovecot authenticator such that the value of
2787 $auth1 could be overwritten, and so not correctly preserved, after a
2788 successful authentication. This usually meant that the value preserved by
2789 the server_setid option was incorrect.
2791 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2793 PH/09 Installed PCRE release 7.0.
2795 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2796 run for batched SMTP input. It is now run at the start of every message
2797 in the batch. While fixing this I discovered that the process information
2798 (output by running exiwhat) was not always getting set for -bs and -bS
2799 input. This is fixed, and it now also says "batched" for BSMTP.
2801 PH/11 Added control=no_pipelining.
2803 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2804 patch, slightly modified), and move the expansion of helo_data till after
2805 the connection is made in the smtp transport (so it can use these
2808 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2810 PH/14 Added log_selector = +pid.
2812 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2814 PH/16 Add ${if forany and ${if forall.
2816 PH/17 Added dsn_from option to vary the From: line in DSNs.
2818 PH/18 Flush SMTP output before performing a callout, unless control =
2819 no_callout_flush is set.
2821 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2822 was true (the default) a successful delivery failed to delete the retry
2823 item, thus causing premature timeout of the address. The bug is now
2826 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2828 PH/21 Long custom messages for fakedefer and fakereject are now split up
2829 into multiline responses in the same way that messages for "deny" and
2830 other ACL rejections are.
2832 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2833 with slight modification.
2835 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2836 draft, changing the syntax and factoring some duplicate code".
2838 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2839 for deliveries of the second and subsequent messages over the same SMTP
2842 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2843 ${reduce, with only minor "tidies".
2845 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2847 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2848 expansion side effects.
2850 PH/27 When a message times out after an over-quota error from an Exim-imposed
2851 quota, the bounce message says "mailbox is full". This message was not
2852 being given when it was a system quota that was exceeded. It now should
2855 MH/03 Made $recipients available in local_scan(). local_scan() already has
2856 better access to the recipient list through recipients_list[], but
2857 $recipients can be useful in postmaster-provided expansion strings.
2859 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2860 in the case of a MAIL command with additional options following the
2861 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2862 were accidentally chopped off.
2864 PH/29 SMTP synchronization checks are implemented when a command is read -
2865 there is a check that no more input is waiting when there shouldn't be
2866 any. However, for some commands, a delay in an ACL can mean that it is
2867 some time before the response is written. In this time, more input might
2868 arrive, invalidly. So now there are extra checks after an ACL has run for
2869 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2870 pipelining has not been advertised.
2872 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2874 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2875 returned in the SMTP response when smtp_return_error_details was false.
2876 This has been fixed.
2878 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2879 instead of the C I/O that was originally supplied, because problems were
2880 reported on Solaris.
2882 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2883 Exim which did not show up earlier: it was assuming that a call to
2884 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2885 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2886 was a macro that became an assignment, so it seemed to work. This has
2887 changed to a proper function call with a void return, hence the compile
2888 error. Exim's code has been fixed.
2890 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2893 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2895 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2897 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2898 because it turns out to be too big or there is a timeout) there is no
2899 "Completed" line in the log. When some messages of this type were
2900 selected by exigrep, they were listed as "not completed". Others were
2901 picked up by some special patterns. I have improved the selection
2902 criteria to be more general.
2904 PH/38 The host_find_failed option in the manualroute router can now be set
2905 to "ignore", to completely ignore a host whose IP address cannot be
2906 found. If all hosts are ignored, the behaviour is controlled by the new
2907 host_all_ignored option.
2909 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2910 homing or because of multiple MX records with /mx) generated more than
2911 one IP address, and the following item turned out to be the local host,
2912 all the secondary addresses of the first item were incorrectly removed
2913 from the list, along with the local host and any following hosts (which
2914 is what is supposed to happen).
2916 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2917 whoever called Exim into the -H file. In the case of the daemon it was
2918 behaving confusingly. When first started, it used values for whoever
2919 started the daemon, but after a SIGHUP it used the Exim user (because it
2920 calls itself on a restart). I have changed the code so that it now always
2923 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2924 message are rejected with the same error (e.g. no authentication or bad
2925 sender address), and a DATA command is nevertheless sent (as can happen
2926 with PIPELINING or a stupid MUA), the error message that was given to the
2927 RCPT commands is included in the rejection of the DATA command. This is
2928 intended to be helpful for MUAs that show only the final error to their
2931 PH/42 Another patch from the Sieve maintainer.
2933 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2934 Eximstats - Fixed some broken HTML links and added missing column headers
2936 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2937 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2939 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2941 PH/43 Yet another patch from the Sieve maintainer.
2943 PH/44 I found a way to check for a TCP/IP connection going away before sending
2944 the response to the final '.' that terminates a message, but only in the
2945 case where the client has not sent further data following the '.'
2946 (unfortunately, this is allowed). However, in many cases there won't be
2947 any further data because there won't be any more messages to send. A call
2948 to select() can be used: if it shows that the input is "ready", there is
2949 either input waiting, or the socket has been closed. An attempt to read
2950 the next input character can distinguish the two cases. Previously, Exim
2951 would have sent an OK response which the client would never have see.
2952 This could lead to message repetition. This fix should cure that, at
2953 least in a lot of common cases.
2955 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2956 advertised in response to EHLO.
2962 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2963 fixed by 4.65/MH/01 (is this a record?) are fixed:
2965 (i) An empty string was always treated as zero by the numeric comparison
2966 operators. This behaviour has been restored.
2968 (ii) It is documented that the numeric comparison operators always treat
2969 their arguments as decimal numbers. This was broken in that numbers
2970 starting with 0 were being interpreted as octal.
2972 While fixing these problems I realized that there was another issue that
2973 hadn't been noticed. Values of message_size_limit (both the global option
2974 and the transport option) were treated as octal if they started with 0.
2975 The documentation was vague. These values are now always treated as
2976 decimal, and I will make that clear in the documentation.
2982 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2983 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2986 MH/01 Don't check that the operands of numeric comparison operators are
2987 integers when their expansion is in "skipping" mode (fixes bug
2988 introduced by 4.64-PH/07).
2990 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2991 child addresses, Exim now panics and dies. Previously, because the count
2992 is held in a short int, deliveries were likely to be lost. As such a
2993 large number of recipients for a single message is ridiculous
2994 (performance will be very, very poor), I have chosen to impose a limit
2995 rather than extend the field.
3001 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3002 leftover -K file (the existence of which was triggered by #402).
3003 While we were at it, introduced process PID as part of the -K
3004 filename. This should rule out race conditions when creating
3007 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3008 processing considerably. Previous code took too long for large mails,
3009 triggering a timeout which in turn triggers #401.
3011 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3012 in the DK code in transports.c. sendfile() is not really portable,
3013 hence the _LINUX specificness.
3015 TF/01 In the add_headers option to the mail command in an Exim filter,
3016 there was a bug that Exim would claim a syntax error in any
3017 header after the first one which had an odd number of characters
3020 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3021 callout verification, Exim cached a "reject" for the entire domain. This
3022 is correct for most verifications, but it is not correct for a recipient
3023 verification with use_sender or use_postmaster set, because in that case
3024 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3025 case of MAIL FROM:<> rejection from other early rejections (e.g.
3026 rejection of HELO). When verifying a recipient using a non-null MAIL
3027 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3028 Whatever the result of the callout, the value of the domain cache is
3029 left unchanged (for any other kind of callout, getting as far as trying
3030 RCPT means that the domain itself is ok).
3032 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3035 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3036 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3037 session, the daemon ignores ECONNECT errors and logs others; it now
3038 ignores EPIPE as well.
3040 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3041 (quoted-printable decoding).
3043 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3044 later the small subsequent patch to fix an introduced bug.
3046 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3048 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3050 PH/08 An error is now given if message_size_limit is specified negative.
3052 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3053 to be given (somewhat) arbitrary names.
3055 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3058 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3059 miscellaneous code fixes
3061 PH/10 Added the log_reject_target ACL modifier to specify where to log
3064 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3065 hostname. This is wrong, because it relates to the incoming message (and
3066 probably the interface on which it is arriving) and not to the outgoing
3067 callout (which could be using a different interface). This has been
3068 changed to use the value of the helo_data option from the smtp transport
3069 instead - this is what is used when a message is actually being sent. If
3070 there is no remote transport (possible with a router that sets up host
3071 addresses), $smtp_active_hostname is used.
3073 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3074 tweaks were necessary in order to get it to work (see also 21 below):
3075 (a) The code assumed that strncpy() returns a negative number on buffer
3076 overflow, which isn't the case. Replaced with Exim's string_format()
3078 (b) There were several signed/unsigned issues. I just did the minimum
3079 hacking in of casts. There is scope for a larger refactoring.
3080 (c) The code used strcasecmp() which is not a standard C function.
3081 Replaced with Exim's strcmpic() function.
3082 (d) The code set only $1; it now sets $auth1 as well.
3083 (e) A simple test gave the error "authentication client didn't specify
3084 service in request". It would seem that Dovecot has changed its
3085 interface. Fortunately there's a specification; I followed it and
3086 changed what the client sends and it appears to be working now.
3088 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3091 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3092 address A is aliased to B and C, where B exists and C does not. Without
3093 -v the output is "A verified" because verification stops after a
3094 successful redirection if more than one address is generated. However,
3095 with -v the child addresses are also verified. Exim was outputting "A
3096 failed to verify" and then showing the successful verification for C,
3097 with its parentage. It now outputs "B failed to verify", showing B's
3098 parentage before showing the successful verification of C.
3100 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3101 look up a TXT record in a specific list after matching in a combined
3104 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3105 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3106 they consult the DNS. I had assumed they would set it the way they
3107 wanted; and indeed my experiments on Linux seem to show that in some
3108 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3109 To be on the safe side, however, I have now made the interface to
3110 host_find_byname() similar to host_find_bydns(), with an argument
3111 containing the DNS resolver options. The host_find_byname() function now
3112 sets these options at its start, just as host_find_bydns() does. The smtp
3113 transport options dns_qualify_single and dns_search_parents are passed to
3114 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3115 of host_find_byname() use the default settings of RES_DEFNAMES
3116 (qualify_single) but not RES_DNSRCH (search_parents).
3118 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3119 spool_read_header() do less string testing, by means of a preliminary
3120 switch on the second character of optional "-foo" lines. (This is
3121 overdue, caused by the large number of possibilities that now exist.
3122 Originally there were few.) While I was there, I also converted the
3123 str(n)cmp tests so they don't re-test the leading "-" and the first
3124 character, in the hope this might squeeze out yet more improvement.
3126 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3127 flag allowing group syntax was set by the header_syntax check but not
3128 turned off, possible causing trouble later; (2) The flag was not being
3129 set at all for the header_verify test, causing "group"-style headers to
3130 be rejected. I have now set it in this case, and also caused header_
3131 verify to ignore an empty address taken from a group. While doing this, I
3132 came across some other cases where the code for allowing group syntax
3133 while scanning a header line wasn't quite right (mostly, not resetting
3134 the flag correctly in the right place). These bugs could have caused
3135 trouble for malformed header lines. I hope it is now all correct.
3137 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3138 with the "reply" argument non-NULL. The code, however (which originally
3139 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3140 but it didn't always do it. This confused somebody who was copying the
3141 code for some other use. I have removed all the tests.
3143 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3144 feature that was used to support insecure browsers during the U.S. crypto
3145 embargo. It requires special client support, and Exim is probably the
3146 only MTA that supported it -- and would never use it because real RSA is
3147 always available. This code has been removed, because it had the bad
3148 effect of slowing Exim down by computing (never used) parameters for the
3149 RSA_EXPORT functionality.
3151 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3152 authenticator to fail if there's a tab character in the incoming data
3153 (there should never be unless someone is messing about, as it's supposed
3154 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3155 if the connection is using TLS or if the remote IP is the same as the
3156 local IP, and the "valid-client-cert option" if a client certificate has
3159 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3160 authenticators. This can be used for authorization after authentication
3161 succeeds. (In the case of plaintext, it servers for both authentication
3164 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3165 if any retry times were supplied.
3167 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3168 connection, where there is no client IP address to check. In this
3169 situation, the verify now always succeeds.
3171 PH/25 Applied John Jetmore's -Mset patch.
3173 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3175 PH/27 In a string expansion for a processed (not raw) header when multiple
3176 headers of the same name were present, leading whitespace was being
3177 removed from all of them, but trailing whitespace was being removed only
3178 from the last one. Now trailing whitespace is removed from each header
3179 before concatenation. Completely empty headers in a concatenation (as
3180 before) are ignored.
3182 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3183 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3185 PH/29 [Removed. This was a change that I later backed out, and forgot to
3186 correct the ChangeLog entry (that I had efficiently created) before
3187 committing the later change.]
3189 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3190 address errors (4xx response to RCPT) over the same connection as other
3191 messages routed to the same hosts. Such deliveries are always "forced",
3192 so retry times are not inspected. This resulted in far too many retries
3193 for the affected addresses. The effect occurred only when there were more
3194 hosts than the hosts_max_try setting in the smtp transport when it had
3195 the 4xx errors. Those hosts that it had tried were not added to the list
3196 of hosts for which the message was waiting, so if all were tried, there
3197 was no problem. Two fixes have been applied:
3199 (i) If there are any address or message errors in an SMTP delivery, none
3200 of the hosts (tried or untried) are now added to the list of hosts
3201 for which the message is waiting, so the message should not be a
3202 candidate for sending over the same connection that was used for a
3203 successful delivery of some other message. This seems entirely
3204 reasonable: after all the message is NOT "waiting for some host".
3205 This is so "obvious" that I'm not sure why it wasn't done
3206 previously. Hope I haven't missed anything, but it can't do any
3207 harm, as the worst effect is to miss an optimization.
3209 (ii) If, despite (i), such a delivery is accidentally attempted, the
3210 routing retry time is respected, so at least it doesn't keep
3211 hammering the server.
3213 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3214 in ${readsocket because some servers need this prod.
3216 PH/32 Added some extra debug output when updating a wait-xxx database.
3218 PH/33 The hint "could be header name not terminated by colon", which has been
3219 given for certain expansion errors for a long time, was not being given
3220 for the ${if def:h_colon_omitted{... case.
3222 PH/34 The spec says: "With one important exception, whenever a domain list is
3223 being scanned, $domain contains the subject domain." There was at least
3224 one case where this was not true.
3226 PH/35 The error "getsockname() failed: connection reset by peer" was being
3227 written to the panic log as well as the main log, but it isn't really
3228 panic-worthy as it just means the connection died rather early on. I have
3229 removed the panic log writing for the ECONNRESET error when getsockname()
3232 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3233 runs only) independently of the message's sender address. This meant
3234 that, if the 4xx error was in fact related to the sender, a different
3235 message to the same recipient with a different sender could confuse
3236 things. In particular, this can happen when sending to a greylisting
3237 server, but other circumstances could also provoke similar problems.
3238 I have changed the default so that the retry time for these errors is now
3239 based a combination of the sender and recipient addresses. This change
3240 can be overridden by setting address_retry_include_sender=false in the
3243 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3244 remote server are returned as part of bounce messages. This was not
3245 happening for LMTP over a pipe (the lmtp transport), but now it is the
3246 same for both kinds of LMTP.
3248 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3249 in header lines that were in fact CNAMEs. This is no longer the case.
3251 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3252 and queue runs started by the daemon processed all messages. This has
3253 been fixed so that -R and -S can now usefully be given with -q<time>.
3255 PH/40 Import PCRE release 6.7 (fixes some bugs).
3257 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3259 PH/42 Give an error if -q is specified more than once.
3261 PH/43 Renamed the variables $interface_address and $interface_port as
3262 $received_ip_address and $received_port, to make it clear that these
3263 values apply to message reception, and not to the outgoing interface when
3264 a message is delivered. (The old names remain recognized, of course.)
3266 PH/44 There was no timeout on the connect() call when using a Unix domain
3267 socket in the ${readsocket expansion. There now is.
3269 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3270 be meaningful with "accept".
3272 SC/01 Eximstats V1.43
3273 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3275 SC/02 Eximstats V1.44
3276 Use a glob alias rather than an array ref in the generated
3277 parser. This improves both readability and performance.
3279 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3280 Collect SpamAssassin and rejection statistics.
3281 Don't display local sender or destination tables unless
3282 there is data to show.
3283 Added average volumes into the top table text output.
3285 SC/04 Eximstats V1.46
3286 Collect data on the number of addresses (recipients)
3287 as well as the number of messages.
3289 SC/05 Eximstats V1.47
3290 Added 'Message too big' to the list of mail rejection
3291 reasons (thanks to Marco Gaiarin).
3293 SC/06 Eximstats V1.48
3294 Mainlog lines which have GMT offsets and are too short to
3295 have a flag are now skipped.
3297 SC/07 Eximstats V1.49 (Alain Williams)
3298 Added the -emptyok flag.
3300 SC/08 Eximstats V1.50
3301 Fixes for obtaining the IP address from reject messages.
3303 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3304 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3305 whitespace changes from 4.64-PH/27
3307 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3310 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3311 are found, allow negative numbers in numeric criteria)
3313 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3315 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3316 to match changes made in 4.64-PH/43
3318 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3320 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3321 "domain" is actually an IP address, and force a failure. This locks out
3322 those revolvers/nameservers that support "A-for-A" lookups, in
3323 contravention of the specifications.
3325 PH/48 When a host name was looked up from an IP address, and the subsequent
3326 forward lookup of the name timed out, the host name was left in
3327 $sender_host_name, contrary to the specification.
3329 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3330 restricted to single-key lookups, Exim was not diagnosing an error if
3331 * or *@ was used with a query-style lookup.
3333 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3335 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3336 long ago, but noone interested enough thought of it. Let's just say that
3337 the "1.1" means that there are some new functions that weren't there at
3338 some point in the past.
3340 PH/51 Error processing for expansion failure of helo_data from an smtp
3341 transport during callout processing was broken.
3343 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3344 tested/used via the -bh/-bhc/-bs options.
3346 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3347 bug, fixed in subsequent PCRE releases).
3349 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3350 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3352 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3358 SC/01 Use a glob alias rather than an array ref in eximstats generated
3359 parser. This improves both readability and performance.
3361 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3362 Don't display local sender or destination tables in eximstats unless
3363 there is data to show.
3364 Added average volumes into the eximstats top table text output.
3366 SC/03 Collect data on the number of addresses (recipients) as well
3367 as the number of messages in eximstats.
3369 TF/01 Correct an error in the documentation for the redirect router. Exim
3370 does (usually) call initgroups() when daemonizing.
3372 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3373 with consistent privilege compared to when running as a daemon.
3375 TF/03 Note in the spec that $authenticated_id is not set for local
3376 submissions from trusted users.
3378 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3379 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3381 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3382 by adding some example configuration directives to the default
3383 configuration file. A little bit of work is required to uncomment the
3384 directives and define how usernames and passwords are checked, but
3385 there is now a framework to start from.
3387 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3388 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3389 without this. I don't know how relevant this is to other LDAP libraries.
3391 PH/02 Add the verb name to the "unknown ACL verb" error.
3393 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3395 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3397 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3398 directory not expanded when it should be if an expanded home directory
3399 was set for the address (which is overridden by the transport).
3401 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3404 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3405 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3406 because it is too late at that time, and has no effect.
3408 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3409 security issue with \' (bugzilla #107). I could not use the
3410 PQescapeStringConn() function, because it needs a PGconn value as one of
3413 PH/08 When testing addresses using -bt, indicate those final addresses that
3414 are duplicates that would not cause an additional delivery. At least one
3415 person was confused, thinking that -bt output corresponded to deliveries.
3416 (Suppressing duplicates isn't a good idea as you lose the information
3417 about possibly different redirections that led to the duplicates.)
3419 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3420 systems where poll() doesn't work, in particular OS X.
3422 PH/10 Added more information to debugging output for retry time not reached.
3424 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3425 operations in malware.c.
3427 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3430 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3431 syslog_duplication set false, log lines that would normally be written
3432 both the the main log and to the reject log were not written to syslog at
3435 PH/14 In the default configuration, change the use of "message" in ACL warn
3436 statements to "add_header".
3438 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3439 not followed by a command (e.g. "seen endif").
3441 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3442 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3445 PH/17 Added extra conditions to the default value of delay_warning_condition
3449 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3450 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3451 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3454 The Auto-Submitted: and various List- headers are standardised, whereas I
3455 don't think Precedence: ever was.
3457 PH/18 Refactored debugging code in route_finduser() to show more information,
3458 in particular, the error code if getpwnam() issues one.
3460 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3461 This is apparently needed in addition to the PH/07 change above to avoid
3462 any possible encoding problems.
3464 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3465 but not after initializing Perl.
3467 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3468 output them only if debugging. By default they are written stderr,
3469 apparently, which is not desirable.
3471 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3474 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3477 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3479 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3480 authenticated or an ident call has been made. Suppress the default
3481 values for $authenticated_id and $authenticated_sender (but permit -oMai
3482 and -oMas) when testing with -bh.
3484 PH/24 Re-jigged the order of the tests in the default configuration so that the
3485 tests for valid domains and recipients precede the DNS black list and CSA
3486 tests, on the grounds that those ones are more expensive.
3488 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3489 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3490 This bug exists in every version of Exim that I still have, right back to
3493 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3494 However, an attempt to turn on case-sensitivity in a regex key by
3495 including (?-i) didn't work because the subject string was already
3496 lowercased, and the effects were non-intuitive. It turns out that a
3497 one-line patch can be used to allow (?-i) to work as expected.
3503 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3504 other effects) broke the use of negated acl sub-conditions.
3506 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3509 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3510 "Deny" causes Exim to reject the incoming connection with a 554 error.
3511 Unfortunately, if there is a major crisis, such as a disk failure,
3512 tcp-wrappers gives "deny", whereas what one would like would be some
3513 kind of temporary error. A kludge has been added to help with this.
3514 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3515 554 error is used if errno is still zero or contains ENOENT (which occurs
3516 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3519 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3521 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3522 errors. Otherwise a message that provokes a temporary error (when other
3523 messages do not) can cause a whole host to time out.
3525 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3526 addresses were routed directly to files or pipes from a redirect router.
3527 File deliveries just didn't batch; pipe deliveries might have suffered
3530 PH/06 A failure to get a lock for a hints database would erroneously always say
3531 "Failed to get write lock", even when it was really a read lock.
3533 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3534 of 0600. This has been changed to use the value of the lockfile_mode
3535 option (which defaults to 0600).
3537 PH/08 Applied small patch from the Sieve maintainer.
3539 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3540 folder from quota calculations, a direct delivery into this folder messed
3541 up the contents of the maildirsize file. This was because the regex was
3542 used only to exclude .Trash (or whatever) when the size of the mailbox
3543 was calculated. There was no check that a delivery was happening into an
3544 excluded directory. This bug has been fixed by ignoring all quota
3545 processing for deliveries into excluded directories.
3547 PH/10 Added the maildirfolder_create_regex option to appendfile.
3553 PH/01 The code for finding all the local interface addresses on a FreeBSD
3554 system running IPv6 was broken. This may well have applied to all BSD
3555 systems, as well as to others that have similar system calls. The broken
3556 code found IPv4 interfaces correctly, but gave incorrect values for the
3557 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3558 that it would not match correctly against @[] and not recognize the IPv6
3561 PH/02 The ipliteral router was not recognizing addresses of the form user@
3562 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3564 PH/03 Added disable_ipv6.
3566 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3567 decoded form, because it is most often used to construct To: headers
3568 lines in autoreplies, and the decoded form may well be syntactically
3569 invalid. However, $reply_address has leading white space removed, and all
3570 newlines turned into spaces so that the autoreply transport does not
3573 PH/05 If group was specified without a user on a router, and no group or user
3574 was specified on a transport, the group from the router was ignored.
3576 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3577 for visible compile-time settings that can be used to change these
3578 numbers, for those that want even more. Backwards compatibility with old
3579 spool files has been maintained. However, going back to a previous Exim
3580 release will lost any variables that are in spool files.
3582 PH/07 Two small changes when running in the test harness: increase delay when
3583 passing a TCP/IP connection to a new process, in case the original
3584 process has to generate a bounce, and remove special handling of
3585 127.0.0.2 (sic), which is no longer necessary.
3587 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3588 be the same on different OS.
3590 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3593 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3594 whether --show-vars was specified or not
3596 JJ/02 exipick: Added support for new ACL variable spool format introduced
3599 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3600 syntactically invalid From: or Reply-to: line, and a filter used this to
3601 generate an autoreply, and therefore failed to obtain an address for the
3602 autoreply, Exim could try to deliver to a non-existent relative file
3603 name, causing unrelated and misleading errors. What now happens is that
3604 it logs this as a hard delivery error, but does not attempt to create a
3607 PH/11 The exinext utility has a -C option for testing purposes, but although
3608 the given file was scanned by exinext itself; it wasn't being passed on
3609 when Exim was called.
3611 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3612 an end-of-file indication when reading a command response.
3614 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3615 compiled. In many other places in Exim, IPv6 addresses are always
3616 recognized, so I have changed this. It also means that IPv4 domain
3617 literals of the form [IPV4:n.n.n.n] are now always recognized.
3619 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3620 used if the router is not running as root, for example, when verifying at
3621 ACL time, or when using -bh. The debugging output from this situation was
3622 non-existent - all you got was a failure to exec. I have made two
3625 (a) Failures to set uid/gid, the current directory, or a process leader
3626 in a subprocess such as that created by queryprogram now generate
3627 suitable debugging output when -d is set.
3629 (b) The queryprogram router detects when it is not running as root,
3630 outputs suitable debugging information if -d is set, and then runs
3631 the subprocess without attempting to change uid/gid.
3633 PH/15 Minor change to Makefile for building test_host (undocumented testing
3636 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3637 additional section of a DNS packet that returns MX or SRV records.
3638 Instead, it always explicitly searches for A/AAAA records. This avoids
3639 major problems that occur when a DNS server includes only records of one
3640 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3641 fixed another bug: if SRV records were looked up and the corresponding
3642 address records were *not* found in the additional section, the port
3643 values from the SRV records were lost.
3645 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3646 using the correct key (the original address) when searching the retry
3647 rules in order to find which one to use for generating the retry hint.
3649 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3650 adding the default one. Similarly, if it contains a Reply-To: header, the
3651 errors_reply_to option, if set, is not used.
3653 PH/19 When calculating a retry time, Exim used to measure the "time since
3654 failure" by looking at the "first failed" field in the retry record. Now
3655 it does not use this if it is later than than the arrival time of the
3656 message. Instead it uses the arrival time. This makes for better
3657 behaviour in cases where some deliveries succeed, thus re-setting the
3658 "first failed" field. An example is a quota failure for a huge message
3659 when small messages continue to be delivered. Without this change, the
3660 "time since failure" will always be short, possible causing more frequent
3661 delivery attempts for the huge message than are intended.
3662 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3664 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3665 $1, $2, $3) because the numerical variables can be reset during some
3666 expansion items (e.g. "match"), thereby losing the authentication data.
3668 PH/21 Make -bV show the size of off_t variables so that the test suite can
3669 decide whether to run tests for quotas > 2G.
3671 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3672 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3673 filecount value is greater than 2G or if a quota value is greater than 2G
3674 on a system where the size of off_t is not greater than 4, a panic error
3677 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3678 never match. The debug and -bh output now contains an explicit error
3679 message indicating a malformed IPv4 address or mask.
3681 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3682 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3683 PH/23 above applies.
3685 PH/25 Do not write to syslog when running in the test harness. The only
3686 occasion when this arises is a failure to open the main or panic logs
3687 (for which there is an explicit test).
3689 PH/26 Added the /no_tell option to "control=freeze".
3691 PH/27 If a host name lookup failed very early in a connection, for example, if
3692 the IP address matched host_lookup and the reverse lookup yielded a name
3693 that did not have a forward lookup, an error message of the form "no IP
3694 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3695 could be logged. Now it outputs the IP address instead of "NULL".
3697 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3698 allows the sender and the authenticated sender to be set when
3699 submitting a message from within Exim. Since child_open_exim() is
3700 documented for local_scan(), the new function should be too.
3702 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3703 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3704 results in an empty string is now treated as unset.
3706 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3708 PH/31 Added sender_verify_fail logging option.
3710 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3711 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3712 tidied the source and removed it altogether.
3714 PH/33 When a queue run was abandoned because the load average was too high, a
3715 log line was always written; now it is written only if the queue_run log
3716 selector is set. In addition, the log line for abandonment now contains
3717 information about the queue run such as the pid. This is always present
3718 in "start" and "stop" lines but was omitted from the "abandon" line.
3720 PH/34 Omit spaces between a header name and the colon in the error message that
3721 is given when verify = headers_syntax fails (if there are lots of them,
3722 the message gets confusing).
3724 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3725 names, as there are now some PTR records that contain slashes. This check
3726 is only to protect against broken name servers that fall over on strange
3727 characters, so the fact that it applies to all lookups doesn't matter.
3729 PH/36 Now that the new test suite is complete, we can remove some of the
3730 special code in Exim that was needed for the old test suite. For example,
3731 sorting DNS records because real resolvers return them in an arbitrary
3732 order. The new test suite's fake resolver always returns records in the
3735 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3736 bounces) except when queue_only is set, to avoid logging races between
3737 the different processes.
3739 PH/38 Panic-die if .include specifies a non-absolute path.
3741 PH/39 A tweak to the "H" retry rule from its user.
3743 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3744 a label. They prevented compilation on older perls.
3746 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3747 a warning to be raised on newish perls.
3749 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3750 on queue. Changes to match documented behaviour of showing count of
3751 messages matching specified criteria.
3753 PH/40 Changed the default ident timeout from 30s to 5s.
3755 PH/41 Added support for the use of login_cap features, on those BSD systems
3756 that have them, for controlling the resources used by pipe deliveries.
3758 PH/42 The content-scanning code uses fopen() to create files in which to put
3759 message data. Previously it was not paying any attention to the mode of
3760 the files. Exim runs with umask(0) because the rest of the code creates
3761 files with open(), and sets the required mode explicitly. Thus, these
3762 files were ending up world-writeable. This was not a big issue, because,
3763 being within the spool directory, they were not world-accessible. I have
3764 created a function called modefopen, which takes an additional mode
3765 argument. It sets umask(777), creates the file, chmods it to the required
3766 mode, then resets the umask. All the relevant calls to fopen() in the
3767 content scanning code have been changed to use this function.
3769 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3770 to 24 hours. This avoids potential overflow problems when processing G
3771 and H retry rules. I suspect nobody ever tinkers with this value.
3773 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3775 PH/45 When the plaintext authenticator is running as a client, the server's
3776 challenges are checked to ensure they are valid base64 strings. By
3777 default, the authentication attempt is cancelled if an invalid string is
3778 received. Setting client_ignore_invalid_base64 true ignores these errors.
3779 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3780 they are received. Thus, the responses can be made to depend on the
3781 challenges. If an invalid string is ignored, an empty string is placed in
3784 PH/46 Messages that are created by the autoreply transport now contains a
3785 References: header, in accordance with RFCs 2822 and 3834.
3787 PH/47 Added authenticated_sender_force to the smtp transport.
3789 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3791 PH/49 Installed latest patch from the Sieve maintainer.
3793 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3794 was also set, the appendfile transport was unnecessarily scanning a
3795 directory of message files (e.g. for maildir delivery) to find the count
3796 of files (along with the size), even though it did not need this
3797 information. It now does the scan only if it needs to find either the
3798 size of the count of files.
3800 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3802 PH/52 Two bugs concerned with error handling when the smtp transport is
3805 (i) Exim was not creating retry information for temporary errors given
3806 for individual recipients after the DATA command when the smtp transport
3807 was used in LMTP mode. This meant that they could be retried too
3808 frequently, and not timed out correctly.
3810 (ii) Exim was setting the flag that allows error details to be returned
3811 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3812 recipients that were returned after the DATA command.
3814 PH/53 This is related to PH/52, but is more general: for any failing address,
3815 when detailed error information was permitted to be returned to the
3816 sender, but the error was temporary, then after the final timeout, only
3817 "retry timeout exceeded" was returned. Now it returns the full error as
3818 well as "retry timeout exceeded".
3820 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3821 do this, and (what is worse) MTAs that accept it.
3823 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3824 will now be deprecated.
3826 PH/56 New os.c-cygwin from the Cygwin maintainer.
3828 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3829 formats (previously only available in exim formats via -bpr, -bpru,
3830 and -bpra. Now also available in native and exiqgrep formats)
3832 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3833 with very large, slow to parse queues
3835 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3837 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3839 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3840 responses to authentication challenges, though it was showing the
3841 challenges; (ii) I've removed the CR characters from the debug output for
3844 PH/58 Allow for the insertion of a newline as well as a space when a string
3845 is turned into more than one encoded-word during RFC 2047 encoding. The
3846 Sieve code now uses this.
3848 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3849 data_4xx, lost_connection, tls_required.
3851 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3852 message was being sent as an SMTP response.
3854 PH/61 Add -l and -k options to exicyclog.
3856 PH/62 When verifying, if an address was redirected to one new address, so that
3857 verification continued, and the new address failed or deferred after
3858 having set something in $address_data, the value of $address_data was not
3859 passed back to the ACL. This was different to the case when no
3860 redirection occurred. The value is now passed back in both cases.
3862 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3863 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3864 use login_cap.h, so on its own it isn't the distinguishing feature. The
3865 new name refers directly to the setclassresources() function.
3867 PH/65 Added configuration files for NetBSD3.
3869 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3871 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3872 is preferred over IPv4.
3874 PH/68 The bounce_return_message and bounce_return_body options were not being
3875 honoured for bounces generated during the reception of non-SMTP messages.
3876 In particular, this applied to messages rejected by the ACL. This bug has
3877 been fixed. However, if bounce_return_message is true and bounce_return_
3878 body is false, the headers that are returned for a non-SMTP message
3879 include only those that have been read before the error was detected.
3880 (In the case of an ACL rejection, they have all been read.)
3882 PH/69 The HTML version of the specification is now built in a directory called
3883 spec_html instead of spec.html, because the latter looks like a path with
3884 a MIME-type, and this confuses some software.
3886 PH/70 Catch two compiler warnings in sieve.c.
3888 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3889 function verify_get_ident() calls ip_connect() to connect a socket, but
3890 if the "connect()" function timed out, ip_connect() used to close the
3891 socket. However, verify_get_ident() also closes the socket later, and in
3892 between Exim writes to the log, which may get opened at this point. When
3893 the socket was closed in ip_connect(), the log could get the same file
3894 descriptor number as the socket. This naturally causes chaos. The fix is
3895 not to close the socket in ip_connect(); the socket should be closed by
3896 the function that creates it. There was only one place in the code where
3897 this was missing, in the iplookup router, which I don't think anybody now
3898 uses, but I've fixed it anyway.
3900 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3901 well as to direct DNS lookups. Otherwise the handling of names in host
3902 lists is inconsistent and therefore confusing.
3908 PH/01 Two changes to the default runtime configuration:
3910 (1) Move the checks for relay_from_hosts and authenticated clients from
3911 after to before the (commented out) DNS black list checks.
3913 (2) Add control=submission to the relay_from_hosts and authenticated
3914 clients checks, on the grounds that messages accepted by these
3915 statements are most likely to be submissions.
3917 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3919 (1) Generate an error if the third argument for the ${prvs expansion is
3922 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3925 (3) Reset the variables that are obtained from the first argument of
3926 ${prvscheck and used in the second argument before leaving the code,
3927 because their memory is reclaimed, so using them afterwards may do
3930 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3931 one (it's much easier than Tom thought :-).
3933 (5) Because of (4), we can now allow for the use of $prvscheck_result
3934 inside the third argument.
3936 PH/03 For some reason, the default setting of PATH when running a command from
3937 a pipe transport was just "/usr/bin". I have changed it to
3940 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3941 anything to be listed in the output from -bV.
3943 PH/05 When a filter generated an autoreply, the entire To: header line was
3944 quoted in the delivery log line, like this:
3946 => >A.N.Other <ano@some.domain> <original@ddress> ...
3948 This has been changed so that it extracts the operative address. There
3949 may be more than one such address. If so, they are comma-separated, like
3952 => >ano@some.domain,ona@other.domain <original@ddress> ...
3954 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3955 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3956 not being looked up in the rDNS to get a host name, Exim was showing the
3957 IP address twice in Received: lines, even though the IP addresses were
3958 identical. For example:
3960 Received: from [1.2.3.4] (helo=[1.2.3.4])
3962 However, if the real host name was known, it was omitting the HELO data
3963 if it matched the actual IP address. This has been tidied up so that it
3964 doesn't show the same IP address twice.
3966 PH/07 When both +timestamp and +memory debugging was on, the value given by
3967 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3968 called by the debug printing, thereby overwriting the timestamp buffer.
3969 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3971 PH/08 When the original message was included in an autoreply transport, it
3972 always said "this is a copy of the message, including all the headers",
3973 even if body_only or headers_only was set. It now gives an appropriate
3976 PH/09 Applied a patch from the Sieve maintainer which:
3978 o fixes some comments
3979 o adds the (disabled) notify extension core
3980 o adds some debug output for the result of if/elsif tests
3981 o points to the current vacation draft in the documentation
3982 and documents the missing references header update
3986 o fixes a bug in processing the envelope test (when testing
3987 multiple envelope elements, the last element determined the
3990 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3991 Electronic Mail") by including:
3993 Auto-submitted: auto-generated
3995 in the messages that it generates (bounce messages and others, such as
3996 warnings). In the case of bounce messages for non-SMTP messages, there was
3997 also a typo: it was using "Auto_submitted" (underscore instead of
3998 hyphen). Since every message generated by Exim is necessarily in response
3999 to another message, thes have all been changed to:
4001 Auto-Submitted: auto-replied
4003 in accordance with these statements in the RFC:
4005 The auto-replied keyword:
4007 - SHOULD be used on messages sent in direct response to another
4008 message by an automatic process,
4010 - MUST NOT be used on manually-generated messages,
4012 - MAY be used on Delivery Status Notifications (DSNs) and Message
4013 Disposition Notifications (MDNs),
4015 - MUST NOT be used on messages generated by automatic or periodic
4016 processes, except for messages which are automatic responses to
4019 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4020 to the default Received: header definition.
4022 PH/12 Added log selector acl_warn_skipped (default on).
4024 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4025 variables because (a) they are in the wrong storage pool and (b) even if
4026 they were copied, it wouldn't work properly because of the caching.
4028 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4029 checking when decoding. Apparently there are clients that generate
4030 overlong encoded strings. Why am I not surprised?
4032 PH/15 If the first argument of "${if match_address" was not empty, but did not
4033 contain an "@" character, Exim crashed. Now it writes a panic log message
4034 and treats the condition as false.
4036 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4038 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4039 extension "envelope-auth". The code is finished and in agreement with
4040 other implementations, but there is no documentation so far and in fact,
4041 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4042 not changing the active code.
4044 Print executed "if" and "elsif" statements when debugging is used. This
4045 helps a great deal to understand what a filter does.
4047 Document more things not specified clearly in RFC3028. I had all this
4048 sorted out, when out of a sudden new issues came to my mind. Oops."
4050 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4053 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4054 canonical form (as documented). However, after a host name lookup from
4055 the IP address, check_host() was doing a simple string comparison with
4056 addresses acquired from the DNS when checking that the found name did
4057 have the original IP as one of its addresses. Since any found IPv6
4058 addresses are likely to be in abbreviated form, the comparison could
4059 fail. Luckily, there already exists a function for doing the comparison
4060 by converting both addresses to binary, so now that is used instead of
4061 the text comparison.
4063 PH/20 There was another similar case to PH/19, when a complete host name was
4064 given in a host list; looking up its IP address could give an abbreviated
4065 form, whereas the current host's name might or might not be abbreviated.
4066 The same fix has been applied.
4072 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4073 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4076 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4077 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4079 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4081 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4082 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4083 Also, for "Auto-Submitted", treat anything other than "no" as
4084 non-personal, in accordance with RFC 3834. (Previously it treated
4085 anything starting "auto-" as non-personal.)
4087 TF/01 The control=submission/name=... option had a problem with syntax
4088 errors if the name included a slash character. The /name= option
4089 now slurps the rest of the string, so it can include any characters
4090 but it must come last in the list of options (after /sender_retain
4093 PH/05 Some modifications to the interface to the fake nameserver for the new
4101 TK/01 Added the "success_on_redirect" address verification option. See
4102 NewStuff for rationale and an example.
4104 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4106 PH/02 Patch to exigrep to allow it to work on syslog lines.
4108 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4109 fread() to skip over the body file's header line, because in Cygwin the
4110 header line is locked and is inaccessible.
4112 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4113 co-exist for some time) to make it clear that it is the Exim ID that is
4114 referenced, not the Message-ID: header line.
4116 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4117 string_format() function, because snprintf() does not exist on all
4120 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4121 ${stat: expansion item.
4123 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4124 protocol synchronization error", to keep the pedants happy.
4126 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4127 well as for IRIX systems, when gcc is being used. See the host.c source
4130 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4132 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4135 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4136 transport and to the smtp transport in LMTP mode.
4138 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4140 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4141 run a filter in a subprocess. This could lead to confusion in subsequent
4142 lookups in the parent process. There should also be a search_tidyup() at
4143 the end of the subprocess.
4145 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4146 only if the host matched helo_try_verify_hosts, which caused the
4147 verification to occur when the EHLO/HELO command was issued. The ACL just
4148 tested the remembered result. Now, if a previous verification attempt has
4149 not happened, "verify = helo" does it there and then.
4151 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4153 TK/03 Fix log output including CR from clamd.
4155 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4156 exist provoked a memory error which could cause a segfault.
4158 PH/15 Installed PCRE 6.2
4160 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4162 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4163 of the problem. Specifically, suggested +O2 rather than +O1 for the
4166 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4168 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4169 record, the port was not correctly logged when the outgoing_port log
4170 selector was set (it logged the transort's default port).
4172 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4173 fallback_hosts, and "hosts" in the smtp transport.
4175 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4176 host errors such as "Connection refused".
4178 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4179 authentication with radiusclient 0.4.9:
4181 - Error returned from rc_read_config was caught wrongly
4182 - Username/password not passed on to radius server due to wrong length.
4184 The presumption is that some radiusclient API changes for 4.51/PH/17
4185 were not taken care of correctly. The code is still untested by me (my
4186 Linux distribution still has 0.3.2 of radiusclient), but it was
4187 contributed by a Radius user.
4189 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4190 expanding the "port" option of the smtp transport.
4192 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4193 while reading a MIME header. Thanks to Tom Hughes for a patch.
4195 PH/24 Include config.h inside local_scan.h so that configuration settings are
4198 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4199 that in an ACL for RCPT (for example), you can examine exactly what was
4202 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4203 commands, but it was not correctly comparing the address with the actual
4204 client host address. Thus, it would show the EHLO address in Received:
4205 header lines when this was not necessary.
4207 PH/27 Added the % operator to ${eval:}.
4209 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4210 it should be ignoring failures (because with -C, for example, it has lost
4211 privilege). It wasn't ignoring creation failures other than "already
4214 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4217 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4218 because an input line was too long, either on its own, or by virtue of
4219 too many continuations, the temporary file was not being removed, and the
4220 return code was incorrect.
4222 PH/31 Missing "BOOL" in function definition in filtertest.c.
4224 PH/32 Applied Sieve patches from the maintainer.
4226 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4228 PH/33 Added "verify = not_blind".
4230 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4231 Local/Makefile (with some defaults set). These are used in built scripts
4232 such as exicyclog, but they have never been used in the exim_install
4233 script (though there are many overriding facilities there). I have
4234 arranged that the exim_install script now takes note of these two
4237 PH/35 Installed configuration files for Dragonfly.
4239 PH/36 When a locally submitted message by a trusted user did not contain a
4240 From: header, and the sender address was obtained from -f or from an SMTP
4241 MAIL command, and the trusted user did not use -F to supply a sender
4242 name, $originator_name was incorrectly used when constructing a From:
4243 header. Furthermore, $originator_name was used for submission mode
4244 messages from external hosts without From: headers in a similar way,
4245 which is clearly wrong.
4247 PH/37 Added control=suppress_local_fixups.
4249 PH/38 When log_selector = +received_sender was set, and the addition of the
4250 sender made the log line's construction buffer exactly full, or one byte
4251 less than full, an overflow happened when the terminating "\n" was
4254 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4255 when the result of a list match is failure because a DNS lookup failed.
4257 PH/40 RM_COMMAND is now used in the building process.
4259 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4260 the "build-* directories that it finds.
4262 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4263 address in a domain literal was a prefix of an interface address.
4265 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4266 when verifying a sender address, unless rewrite_headers is false.
4268 PH/44 Wrote a long comment about why errors_to addresses are verified as
4269 recipients, not senders.
4271 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4272 the ratelimit ACL was added.
4274 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4276 PH/46 Added extra information about PostgreSQL errors to the error string.
4278 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4279 avoiding the need to install special zones in a real server. This is
4280 backwards compatible; if it can't find the fake resolver, it drops back.
4281 Thus, both old and new test suites can be run.
4283 TF/02 Added util/ratelimit.pl
4285 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4286 clock is set back in time.
4288 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4289 Candler <B.Candler@pobox.com>.
4291 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4292 OK for addresses that are the result of redirections.
4294 PH/48 A number of further additions for the benefit of the new test suite,
4295 including a fake gethostbyname() that interfaces to the fake DNS resolver
4298 TF/06 The fix for widen_domains has also been applied to qualify_single and
4299 search_parents which are the other dnslookup options that can cause
4302 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4305 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4307 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4308 service" if it encountered an MX record with an empty target hostname.
4309 The message is now "an MX or SRV record indicated no SMTP service".
4311 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4312 if the DNS of the sending site is misconfigured. This is quite a
4313 common situation. This change restores the behaviour of treating a
4314 helo verification defer as a failure.
4316 PH/51 If self=fail was set on a router, the bounce message did not include the
4317 actual error message.
4323 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4325 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4326 command itself ended in error, the underlying message about the transport
4327 filter timeout was being overwritten with the pipe command error. Now the
4328 underlying error message should be appended to the second error message.
4330 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4332 PH/02 Reduce the amount of output that "make" produces by default. Full output
4333 can still be requested.
4335 PH/03 The warning log line about a condition test deferring for a "warn" verb
4336 was being output only once per connection, rather than after each
4337 occurrence (because it was using the same function as for successful
4338 "warn" verbs). This seems wrong, so I have changed it.
4340 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4341 it should not have, which might have caused a crash in the right
4342 circumstances, but probably never did.
4344 PH/04 Installed a modified version of Tony Finch's patch to make submission
4345 mode fix the return path as well as the Sender: header line, and to
4346 add a /name= option so that you can make the user's friendly name appear
4349 TF/03 Added the control = fakedefer ACL modifier.
4351 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4352 Mark Lowes for thorough testing.
4354 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4356 TK/03 Merged latest SRS patch from Miles Wilton.
4358 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4359 with the definition in sysexits.h (which is #included earlier).
4360 Fortunately, Exim does not actually use EX_OK. The code used to try to
4361 preserve the sysexits.h value, by assuming that macro definitions were
4362 scanned for macro replacements. I have been disabused of this notion,
4363 so now the code just undefines EX_OK before #including unistd.h.
4365 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4366 in the smtp transport. When a block could not be written in a single
4367 write() function, the timeout was being re-applied to each part-write.
4368 This seems wrong - if the receiver was accepting one byte at a time it
4369 would take for ever. The timeout is now adjusted when this happens. It
4370 doesn't have to be particularly precise.
4372 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4373 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4375 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4376 without a domain if the check to <postmaster@domain> fails.
4378 SC/01 Eximstats: added -xls and the ability to specify output files
4379 (patch written by Frank Heydlauf).
4381 SC/02 Eximstats: use FileHandles for outputting results.
4383 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4385 SC/04 Eximstats: fixed display of large numbers with -nvr option
4387 SC/05 Eximstats: fixed merging of reports with empty tables.
4389 SC/06 Eximstats: added the -include_original_destination flag
4391 SC/07 Eximstats: removed tabs and trailing whitespace.
4393 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4395 TK/06 MBOX spool code: Add real "From " MBOX separator line
4396 so the .eml file is really in mbox format (even though
4397 most programs do not really care). Patch from Alex Miller.
4399 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4400 The latter is generated from $received_to and is only set if the
4401 message has one envelope recipient. SA can use these headers,
4402 obviously out-of-the-box. Patch from Alex Miller.
4404 PH/08 The ${def test on a variable was returning false if the variable's
4405 value was "0", contrary to what the specification has always said!
4406 The result should be true unless the variable is empty.
4408 PH/09 The syntax error of a character other than { following "${if
4409 def:variable_name" (after optional whitespace) was not being diagnosed.
4410 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4411 accidental colon was present, for example, could give incorrect results.
4413 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4414 result is used (not including appendfile, where other changes are about
4417 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4418 This involved changing a lot of size variables from int to off_t. It
4419 should work with maildirs and everything.
4421 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4422 spamd dying while we are connected to it.
4424 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4427 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4428 function for BDB 4.3.
4430 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4432 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4433 the sources for PCRE have been re-arranged and more files are now
4436 PH/15 The code I had for printing potentially long long variables in PH/11
4437 above was not the best (it lost precision). The length of off_t variables
4438 is now inspected at build time, and an appropriate printing format (%ld
4439 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4440 to be "long long int" or "long int". This is needed for the internal
4441 formatting function string_vformat().
4443 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4444 the configuration file to be ":syslog", then the script "guesses" where
4445 the logs files are, rather than using the compiled in default. In our
4446 case the guess is not the same as the compiled default, so the script
4447 suddenly stopped working when I started to use syslog. The patch checks
4448 to see if log_file_path is "". If so, it attempts to read it from exim
4449 with no configuration file to get the compiled in version, before it
4450 falls back to the previous guessing code."
4452 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4453 implementing BATV in an Exim configuration. See NewStuff for the gory
4456 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4457 Makefile that are specific to HP-UX.
4459 PH/18 If the "use_postmaster" option was set for a recipient callout together
4460 with the "random" option, the postmaster address was used as the MAIL
4461 FROM address for the random test, but not for the subsequent recipient
4462 test. It is now used for both.
4464 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4465 patch removes a few documentation additions to RFC 3028, because the
4466 latest draft now contains them. It adds the new en;ascii-case comparator
4467 and a new error check for 8bit text in MIME parts. Comparator and
4468 require names are now matched exactly. I enabled the subaddress
4469 extension, but it is not well tested yet (read: it works for me)."
4471 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4472 rework some of the code of TK/09 above to avoid the hardwired use of
4473 "%lld" and "long long". Replaced the call to snprintf() with a call to
4476 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4477 records point to non-existent hosts", "retry timeout exceeded", and
4478 "retry time not reached for any host after a long failure period".
4480 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4481 experimental DomainKeys support:
4483 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4484 (2) On an error such as an illegally used "control", the wrong name for
4485 the control was given.
4487 These problems did NOT occur unless DomainKeys support was compiled.
4489 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4491 PH/24 Added ${if match_ip condition.
4493 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4494 databases so that it will be absolutely obvious if a crash occurs in the
4495 DB library. This is a regular occurrence (often caused by mis-matched
4498 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4499 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4500 picked up on a user's system that detects such things. There doesn't seem
4501 to be a gcc warning option for this - only an attribute that has to be
4502 put on the function's prototype. It seems that in Fedora Core 4 they have
4503 set this on a number of new functions. No doubt there will be more in due
4506 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4507 specify a transport. However, if an address that was verified by such a
4508 router was the subject of a callout, Exim crashed because it tried to
4509 read the rcpt_include_affixes from the non-existent transport. Now it
4510 just assumes that the setting of that option is false. This bug was
4511 introduced by 4.51/PH/31.
4513 PH/28 Changed -d+all to exclude +memory, because that information is very
4514 rarely of interest, but it makes the output a lot bigger. People tend to
4515 do -d+all out of habit.
4517 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4518 code in os-type was giving problems when libc.so lives in lib64, like on
4521 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4522 aren't the modern standard, and it seems that some systems' include files
4523 don't always have them. Exim was already checking for some of the newer
4524 ones like T_AAAA, and defining it itself. I've added checks for all the
4525 record types that Exim uses.
4527 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4528 not automatically generating a new one, as it is supposed to. This
4529 prevented TLS from working. If the file did exist, but contained invalid
4530 data, a new version was generated, as expected. It was only the case of a
4531 non-existent file that was broken.
4533 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4534 with a change in libdomainkeys > 0.64.
4536 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4537 from DNS. If the selector record carries the flag, it now has
4538 precedence over the domain-wide flag.
4540 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4542 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4543 the use of a port name that isn't defined in /etc/services) occurred, the
4544 message was deferred as in a normal delivery, and thus remained on the
4545 spool, instead of being failed because of the mua_wrapper setting. This
4546 is now fixed, and I tidied up some of the mua_wrapper messages at the
4549 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4550 the messages in a hash of arrays rather than using individual hashes.
4551 This is a bit cleaner and results in dramatic memory savings, albeit
4552 at a slight CPU cost.
4554 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4555 as requested by Marc Sherman.
4557 SC/10 Eximstats: added histograms for user specified patterns as requested
4560 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4562 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4563 fopen() in the content-scanning modules that did not already have it.
4569 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4570 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4572 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4574 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4576 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4577 to test Sieve filters that use "vacation".
4579 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4580 that changes the way the GnuTLS parameters are stored in the cache file.
4581 The new format can be generated externally. For backward compatibility,
4582 if the data in the cache doesn't make sense, Exim assumes it has read an
4583 old-format file, and it generates new data and writes a new file. This
4584 means that you can't go back to an older release without removing the
4587 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4588 work if there are any delivery delays because "one_time" forces the
4589 parent to be marked "delivered", so its unseen clone is never tried
4590 again. For this reason, Exim now forbids the simultaneous setting of
4593 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4594 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4595 entry if you want to know the details. The fix, however, neglected to
4596 consider the case when local delivery batching is involved. The test for
4597 "previously delivered" was not happening when checking to see if an
4598 address could be batched with a previous (undelivered) one; under
4599 certain circumstances this could lead to multiple deliveries to the same
4602 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4603 in its include files, and this causes problems building Exim.
4605 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4606 header_syntax) but Exim was just ignoring anything given after a slash.
4607 In particular, this caused confusion with an attempt to use "verify =
4608 reverse_host_lookup/defer_ok". An error is now given when options are
4609 supplied for verify items that do not have them. (Maybe reverse_host_
4610 lookup should have a defer_ok option, but that's a different point.)
4612 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4613 defined by RFC 821) to 2048, because there were problems with some AUTH
4614 commands, and RFC 1869 says the size should be increased for extended
4615 SMTP commands that take arguments.
4617 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4620 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4621 "unknown" error; now it says that the functionality isn't in the binary.
4623 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4624 an address' error message when a string expansion fails (syntax or
4625 whatever). Otherwise the password may appear in the log. Following change
4626 PH/42 below, there is no longer a chance of it appearing in a bounce
4629 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4631 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4632 of its addresses was ever tried. (Bugzilla bug #2.)
4634 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4635 the result incorrectly in the debug output. (It correctly added a newline
4636 to what was transported.)
4638 TF/01 Added $received_time.
4640 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4641 commented out examples of how to interface to a virus scanner and to
4642 SpamAssassin. Also added commented examples of av_scanner and
4643 spamd_address settings.
4645 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4646 and controls are allowed in which ACLs. There were a couple of minor
4647 errors. Some of the entries in the conditions table (which is a table of
4648 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4649 negation of where the condition IS allowed.
4651 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4653 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4654 header file does not have a version number, so I've had to invent a new
4655 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4656 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4657 radiusclient), but it was contributed by a Radius user.
4659 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4660 files or directories, for OpenSSL.
4662 PH/19 When an Exim process that is running as root has to create an Exim log
4663 file, it does so in a subprocess that runs as exim:exim so as to get the
4664 ownership right at creation (otherwise, other Exim processes might see
4665 the file with the wrong ownership). There was no test for failure of this
4666 fork() call, which would lead to the process getting stuck as it waited
4667 for a non-existent subprocess. Forks do occasionally fail when resources
4668 run out. I reviewed all the other calls to fork(); they all seem to check
4671 PH/20 When checking for unexpected SMTP input at connect time (before writing
4672 the banner), Exim was not dealing correctly with a non-positive return
4673 from the read() function. If the client had disconnected by this time,
4674 the result was a log entry for a synchronization error with an empty
4675 string after "input=" when read() returned zero. If read() returned -1
4676 (an event I could not check), uninitialized data bytes were printed.
4677 There were reports of junk text (parts of files, etc) appearing after
4680 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4682 PH/22 Added support for macro redefinition, and (re)definition in between
4683 driver and ACL definitions.
4685 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4686 forgetting to use the resulting value; it was using the unexpanded value.
4688 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4689 hadn't been configured. The fix is from Juergen Kreileder, who
4690 understands it better than I do:
4692 "Here's what I see happening with three configured cyrus_sasl
4693 authenticators configured (plain, login, cram-md5):
4695 On startup auth_cyrus_sasl_init() gets called for each of these.
4696 This means three calls to sasl_listmech() without a specified mech_list.
4697 => SASL tests which mechs of all available mechs actually work
4698 => three warnings about OTP not working
4699 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4701 With the patch, sasl_listmech() also gets called three times. But now
4702 SASL's mech_list option is set to the server_mech specified in the the
4703 authenticator. Or in other words, the answer from sasl_listmech()
4704 gets limited to just the mech you're testing for (which is different
4706 => the return list contains just 'plain' or 'login', 'cram-md5' or
4707 nothing depending on the value of ob->server_mech.
4709 I've just tested the patch: Authentication still works fine,
4710 unavailable mechs specified in the exim configuration are still
4711 caught, and the auth.log warnings about OTP are gone."
4713 PH/25 When debugging is enabled, the contents of the command line are added
4714 to the debugging output, even when log_selector=+arguments is not
4717 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4718 answer is "GNU", and only if the return is "GNU/something" is the answer
4721 PH/27 $acl_verify_message is now set immediately after the failure of a
4722 verification in an ACL, and so is available in subsequent modifiers. In
4723 particular, the message can be preserved by coding like this:
4725 warn !verify = sender
4726 set acl_m0 = $acl_verify_message
4728 Previously, $acl_verify_message was set only while expanding "message"
4729 and "log_message" when a very denied access.
4731 PH/28 Modified OS/os.c-Linux with
4733 -#ifndef OS_LOAD_AVERAGE
4734 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4736 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4737 nomenclature these days.)
4739 PH/29 Installed patch from the Sieve maintainer that adds the options
4740 sieve_useraddress and sieve_subaddress to the redirect router.
4742 PH/30 In these circumstances:
4743 . Two addresses routed to the same list of hosts;
4744 . First host does not offer TLS;
4745 . First host accepts first address;
4746 . First host gives temporary error to second address;
4747 . Second host offers TLS and a TLS session is established;
4748 . Second host accepts second address.
4749 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4750 and peerdn, if requested) that were in fact used only for the second
4753 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4754 attention to any local part prefix or suffix that was matched by the
4755 router that accepted the address. It now behaves in the same way as it
4756 does for delivery: the affixes are removed from the local part unless
4757 rcpt_include_affixes is set on the transport.
4759 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4760 timeout during the DATA phase of an incoming message.
4762 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4763 applied a patch sanctioned by the Sieve maintainer.
4765 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4766 the uid or gid is negative. A case of a negative gid caused this to be
4767 noticed. The fix allows for either to be negative.
4769 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4770 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4773 PH/36 The change PH/12 above was broken. Fixed it.
4775 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4776 the grounds that routing the same address twice would always produce the
4777 same answer. This might have been true once, but it is certainly no
4778 longer true now. Routing a child address may depend on the previous
4779 routing that produced that child. Some complicated redirection strategies
4780 went wrong when messages had multiple recipients, and made Exim's
4781 behaviour dependent on the order in which the addresses were given.
4783 I have moved the duplicate checking until after the routing is complete.
4784 Exim scans the addresses that are assigned to local and remote
4785 transports, and removes any duplicates. This means that more work will be
4786 done, as duplicates will always all be routed, but duplicates are
4787 presumably rare, so I don't expect this is of any significance.
4789 For deliveries to pipes, files, and autoreplies, the duplicate checking
4790 still happens during the routing process, since they are not going to be
4793 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4794 It corrects a timeout issue with spamd. This is Ian's comment: "The
4795 background is that sometimes spamd either never reads data from a
4796 connection it has accepted, or it never writes response data. The exiscan
4797 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4798 blindly assumes that writes won't block so it may never time out."
4800 PH/39 Allow G after quota size as well as K and M.
4802 PH/40 The value set for $authenticated_id in an authenticator may not contain
4803 binary zeroes or newlines because the value is written to log lines and
4804 to spool files. There was no check on this. Now the value is run through
4805 the string_printing() function so that such characters are converted to
4806 printable escape sequences.
4808 PH/41 $message_linecount is a new variable that contains the total number of
4809 lines in the message. Compare $body_linecount, which is the count for the
4812 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4813 bounce and delay warning messages, except in certain special cases, which
4816 (a) An SMTP error message from a remote host;
4817 (b) A message specified in a :fail: redirection;
4818 (c) A message specified in a "fail" command in a system filter;
4819 (d) A message specified in a FAIL return from the queryprogram router;
4820 (e) A message specified by the cannot_route_message router option.
4822 In these cases only, Exim does include the error details in bounce and
4823 warning messages. There are also a few cases where bland messages such
4824 as "unrouteable address" or "local delivery error" are given.
4826 PH/43 $value is now also set for the "else" part of a ${run expansion.
4828 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4829 being worked on, but at least Exim now implements the latest version to
4832 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4833 process to complete was treated as a delivery failure, a timeout while
4834 writing the message to the pipe was logged, but erroneously treated as a
4835 successful delivery. Such timeouts include transport filter timeouts. For
4836 consistency with the overall process timeout, these timeouts are now
4837 treated as errors, giving rise to delivery failures by default. However,
4838 there is now a new Boolean option for the pipe transport called
4839 timeout_defer, which, if set TRUE, converts the failures into defers for
4840 both kinds of timeout. A transport filter timeout is now identified in
4843 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4844 systems where "make" and "gmake" are different, calling "gmake" at top
4845 level broke things. I've arranged for the value of $(MAKE) to be passed
4846 from the Makefile to this script so that it can call the same version of
4850 A note about Exim versions 4.44 and 4.50
4851 ----------------------------------------
4853 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4854 changes of various kinds. As a consequence, a big documentation update was
4855 needed. This delayed the release for rather longer than seemed good, especially
4856 in the light of a couple of (minor) security issues. Therefore, the changes
4857 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4858 release. So 4.44 and 4.50 are in effect two different branches that both start
4861 I have left the 4.50 change log unchanged; it contains all the changes since
4862 4.43. The change log for 4.44 is below; many of its items are identical to
4863 those for 4.50. This seems to be the most sensible way to preserve the
4864 historical information.
4870 1. Minor wording change to the doc/README.SIEVE file.
4872 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4873 computation of the current number of files was incorrect.
4875 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4876 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4879 4. Give more explanation in the error message when the command for a transport
4880 filter fails to execute.
4882 5. There are several places where Exim runs a non-Exim command in a
4883 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4884 was being done only for the command run by the queryprogram router. It is
4885 now done for all such subprocesses. The other cases are: ${run, transport
4886 filters, and the commands run by the lmtp and pipe transports.
4888 6. Added CONFIGURE_GROUP build-time option.
4890 7. Some older OS have a limit of 256 on the maximum number of file
4891 descriptors. Exim was using setrlimit() to set 1000 as a large value
4892 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4893 systems. I've change it so that if it can't get 1000, it tries for 256.
4895 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4896 was an oversight, and furthermore, ever since the addition of extra
4897 controls (e.g. 4.43/32), the checks on when to allow different forms of
4898 "control" were broken. There should now be diagnostics for all cases when a
4899 control that does not make sense is encountered.
4901 9. Added the /retain_sender option to "control=submission".
4903 10. $recipients is now available in the predata ACL (oversight).
4905 11. Tidy the search cache before the fork to do a delivery from a message
4906 received from the command line. Otherwise the child will trigger a lookup
4907 failure and thereby defer the delivery if it tries to use (for example) a
4908 cached ldap connection that the parent has called unbind on.
4910 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4911 of $address_data from the recipient verification was clobbered by the
4912 sender verification.
4914 13. The value of address_data from a sender verification is now available in
4915 $sender_address_data in subsequent conditions in the ACL statement.
4917 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4919 15. Added a new option "connect=<time>" to callout options, to set a different
4922 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4923 was its contents. (It was OK if the option was not defined at all.)
4925 17. A "Completed" log line is now written for messages that are removed from
4926 the spool by the -Mrm option.
4928 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4929 information about exactly what failed.
4931 19. Added -dd to debug only the daemon process.
4933 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4934 handles timeouts, both on the server side and network timeouts. Renamed the
4935 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4937 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4938 It is now set to "smtps".
4940 22. $host_address is now set to the target address during the checking of
4941 ignore_target_hosts.
4943 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4944 being passed; this would have caused $sender_host_name to have been used if
4945 matching the list had actually called for a host name (not very likely,
4946 since this list is usually IP addresses). A host name is now passed as
4949 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4950 code that specifies a non-restarting handler (typically sigaction() in
4951 modern systems) in an attempt to fix a rare and obscure crash bug.
4953 25. Narrowed the window for a race in the daemon that could cause it to ignore
4954 SIGCHLD signals. This is not a major problem, because they are used only to
4955 wake it up if nothing else does.
4957 26. A malformed maildirsize file could cause Exim to calculate negative values
4958 for the mailbox size or file count. Odd effects could occur as a result.
4959 The maildirsize information is now recalculated if the size or filecount
4962 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4963 support for a long time. Removed HAVE_SYS_VFS_H.
4965 28. Installed the latest version of exipick from John Jetmore.
4967 29. In an address list, if the pattern was not a regular expression, an empty
4968 subject address (from a bounce message) matched only if the pattern was an
4969 empty string. Non-empty patterns were not even tested. This was the wrong
4970 because it is perfectly reasonable to use an empty address as part of a
4971 database query. An empty address is now tested by patterns that are
4972 lookups. However, all the other forms of pattern expect the subject to
4973 contain a local part and a domain, and therefore, for them, an empty
4974 address still always fails if the pattern is not itself empty.
4976 30. Exim went into a mad DNS loop when attempting to do a callout where the
4977 host was specified on an smtp transport, and looking it up yielded more
4978 than one IP address.
4980 31. Re-factored the code for checking spool and log partition space into a
4981 function that finds that data and another that does the check. The former
4982 is then used to implement four new variables: $spool_space, $log_space,
4983 $spool_inodes, and $log_inodes.
4985 32. The RFC2047 encoding function was originally intended for short strings
4986 such as real names; it was not keeping to the 75-character limit for
4987 encoded words that the RFC imposes. It now respects the limit, and
4988 generates multiple encoded words if necessary. To be on the safe side, I
4989 have increased the buffer size for the ${rfc2047: expansion operator from
4992 33. It is now permitted to omit both strings after an "if" condition; if the
4993 condition is true, the result is "true". As before, when the second string
4994 is omitted, a false condition yields an empty string. This makes it less
4995 cumbersome to write custom ACL and router conditions.
4997 34. Failure to deliver a bounce message always caused it to be frozen, even if
4998 there was an errors_to setting on the router. The errors_to setting is now
5001 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5002 canonical form (fully expanded) before being placed in
5003 $sender_host_address.
5005 36. The table in the code that translates DNS record types into text (T_A to
5006 "A" for instance) was missing entries for NS and CNAME. It is just possible
5007 that this could have caused confusion if both these types were looked up
5008 for the same domain, because the text type is used as part of Exim's
5009 per-process caching. But the chance of anyone hitting this buglet seems
5012 37. The dnsdb lookup has been extended in a number of ways.
5014 (1) There is a new type, "zns", which walks up the domain tree until it
5015 finds some nameserver records. It should be used with care.
5017 (2) There is a new type, "mxh", which is like "mx" except that it returns
5018 just the host names, not the priorities.
5020 (3) It is now possible to give a list of domains (or IP addresses) to be
5021 looked up. The behaviour when one of the lookups defers can be
5022 controlled by a keyword.
5024 (4) It is now possible to specify the separator character for use when
5025 multiple records are returned.
5027 38. The dnslists ACL condition has been extended: it is now possible to supply
5028 a list of IP addresses and/or domains to be looked up in a particular DNS
5031 39. Added log_selector=+queue_time_overall.
5033 40. When running the queue in the test harness, wait just a tad after forking a
5034 delivery process, to get repeatability of debugging output.
5036 41. Include certificate and key file names in error message when GnuTLS fails
5037 to set them up, because the GnuTLS error message doesn't include the name
5038 of the failing file when there is a problem reading it.
5040 42. Allow both -bf and -bF in the same test run.
5042 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5044 44. The "Exiscan patch" is now merged into the mainline Exim source.
5046 45. Sometimes the final signoff response after QUIT could fail to get
5047 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5048 < 0 before doing a fflush(). This bug looks as though it goes back to the
5049 introduction of TLS in release 3.20, but "sometimes" must have been rare
5050 because the tests only now provoked it.
5052 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5053 (this can affect the format of dates).
5055 47. exim_tidydb, when checking for the continued existence of a message for
5056 which it has found a message-specific retry record, was not finding
5057 messages that were in split spool directories. Consequently, it was
5058 deleting retry records that should have stayed in existence.
5060 48. Steve fixed some bugs in eximstats.
5062 49. The SPA authentication driver was not abandoning authentication and moving
5063 on to the next authenticator when an expansion was forced to fail,
5064 contradicting the general specification for all authenticators. Instead it
5065 was generating a temporary error. It now behaves as specified.
5067 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5068 (the order specifies the preference for clients). The order is now AES256,
5069 AES128, 3DES, ARCFOUR128.
5071 51. Small patch to Sieve code - explicitly set From: when generating an
5074 52. Exim crashed if a remote delivery caused a very long error message to be
5075 recorded - for instance if somebody sent an entire SpamAssassin report back
5076 as a large number of 550 error lines. This bug was coincidentally fixed by
5077 increasing the size of one of Exim's internal buffers (big_buffer) that
5078 happened as part of the Exiscan merge. However, to be on the safe side, I
5079 have made the code more robust (and fixed the comments that describe what
5082 53. Now that there can be additional text after "Completed" in log lines (if
5083 the queue_time_overall log selector is set), a one-byte patch to exigrep
5084 was needed to allow it to recognize "Completed" as not the last thing in
5087 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5088 patch that reportedly fixes this has been added. I am not expert enough to
5089 create a test for it. This is what the patch creator wrote:
5091 "I found a little strange behaviour of ldap code when working with
5092 Windows 2003 AD Domain, where users was placed in more than one
5093 Organization Units. When I tried to give exim partial DN, the exit code
5094 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5095 But simultaneously result of request was absolutely normal ldap result,
5096 so I produce this patch..."
5098 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5099 REFERENCE, so I have modified the code to exclude the patch when that macro
5102 55. Some experimental protocols are using DNS PTR records for new purposes. The
5103 keys for these records are domain names, not reversed IP addresses. The
5104 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5105 leaves it alone. Component reversal etc. now happens only for IP addresses.
5108 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5110 57. Double the size of the debug message buffer (to 2048) so that more of very
5111 long debug lines gets shown.
5113 58. The exicyclog utility now does better if the number of log files to keep
5114 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5116 59. Two changes related to the smtp_active_hostname option:
5118 (1) $smtp_active_hostname is now available as a variable.
5119 (2) The default for smtp_banner uses $smtp_active_hostname instead
5120 of $primary_hostname.
5122 60. The host_aton() function is supposed to be passed a string that is known
5123 to be a valid IP address. However, in the case of IPv6 addresses, it was
5124 not checking this. This is a hostage to fortune. Exim now panics and dies
5125 if the condition is not met. A case was found where this could be provoked
5126 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5127 components; fortuitously, this particular loophole had already been fixed
5128 by change 4.50/55 above.
5130 If there are any other similar loopholes, the new check in host_aton()
5131 itself should stop them being exploited. The report I received stated that
5132 data on the command line could provoke the exploit when Exim was running as
5133 exim, but did not say which command line option was involved. All I could
5134 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5135 running as the user.
5138 61. There was a buffer overflow vulnerability in the SPA authentication code
5139 (which came originally from the Samba project). I have added a test to the
5140 spa_base64_to_bits() function which I hope fixes it.
5143 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5144 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5146 63. The daemon start-up calls getloadavg() while still root for those OS that
5147 need the first call to be done as root, but it missed one case: when
5148 deliver_queue_load_max is set with deliver_drop_privilege. This is
5149 necessary for the benefit of the queue runner, because there is no re-exec
5150 when deliver_drop_privilege is set.
5152 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5153 This has been fixed.
5155 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5156 was in use, was not putting the data itself into the right store pool;
5157 consequently, it could be overwritten for a subsequent message in the same
5158 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5161 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5163 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5164 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5165 the function were treating the return as a boolean value, which happened to
5166 work because 0=false and not-0=true, but is not correct code.
5168 68. The host_aton() function was not handling scoped IPv6 addresses (those
5169 with, for example, "%eth0" on the end) correctly.
5171 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5172 negated items (that is, ~something) in unsigned ints. Some compilers
5173 apparently mutter when there is no cast.
5175 70. If an address verification called from an ACL failed, and did not produce a
5176 user-specific message (i.e. there was only a "system" message), nothing was
5177 put in $acl_verify_message. In this situation, it now puts the system
5180 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5181 session; change 4.31/43 added the unwanted input to the log line - except
5182 that it did not do this in the start of session case. It now does.
5184 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5185 This is wrong and can cause the other end to generate a synchronization
5186 error if it is another Exim or anything else that does the synchronization
5187 check. A QUIT command is no longer sent after a timeout.
5189 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5190 during host lookups.
5192 74. The defer_ok option of callout verification was not working if it was used
5193 when verifying addresses in header lines, that is, for this case:
5195 verify = header_sender/callout=defer_ok
5197 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5198 those file descriptors could be used for SMTP connections. If anything
5199 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5200 could be sent to the SMTP client, causing chaos. The daemon now opens
5201 stdin, stdout, and stderr to /dev/null when it puts itself into the
5204 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5205 log by default. The user can override this with suitable Perl magic.
5207 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5208 the log message when discard triggers, was not working for the DATA ACL or
5209 for the non-SMTP ACL.
5211 78. Error message wording change in sieve.c.
5213 79. If smtp_accept_max_per_host was set, the number of connections could be
5214 restricted to fewer than expected, because the daemon was trying to set up
5215 a new connection before checking whether the processes handling previous
5216 connections had finished. The check for completed processes is now done
5217 earlier. On busy systems, this bug wouldn't be noticed because something
5218 else would have woken the daemon, and it would have reaped the completed
5221 80. If a message was submitted locally by a user whose login name contained one
5222 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5223 It caused a spool format error. I have fixed the spool reading code. A
5224 related problem was that the "from" clause in the Received: line became
5225 illegal because of the space(s). It is now covered by ${quote_local_part.
5227 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5230 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5232 83. Patch from Sieve maintainer to fix unterminated string problem in
5233 "vacation" handling.
5235 84. Some minor changes to the Linux configuration files to help with other
5236 OS variants using glibc.
5238 85. One more patch for Sieve to update vacation handling to latest spec.
5241 ----------------------------------------------------
5242 See the note above about the 4.44 and 4.50 releases.
5243 ----------------------------------------------------
5249 1. Change 4.43/35 introduced a bug that caused file counts to be
5250 incorrectly computed when quota_filecount was set in an appendfile
5253 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5254 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5257 3. Give more explanation in the error message when the command for a transport
5258 filter fails to execute.
5260 4. There are several places where Exim runs a non-Exim command in a
5261 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5262 was being done only for the command run by the queryprogram router. It is
5263 now done for all such subprocesses. The other cases are: ${run, transport
5264 filters, and the commands run by the lmtp and pipe transports.
5266 5. Some older OS have a limit of 256 on the maximum number of file
5267 descriptors. Exim was using setrlimit() to set 1000 as a large value
5268 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5269 systems. I've change it so that if it can't get 1000, it tries for 256.
5271 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5272 was an oversight, and furthermore, ever since the addition of extra
5273 controls (e.g. 4.43/32), the checks on when to allow different forms of
5274 "control" were broken. There should now be diagnostics for all cases when a
5275 control that does not make sense is encountered.
5277 7. $recipients is now available in the predata ACL (oversight).
5279 8. Tidy the search cache before the fork to do a delivery from a message
5280 received from the command line. Otherwise the child will trigger a lookup
5281 failure and thereby defer the delivery if it tries to use (for example) a
5282 cached ldap connection that the parent has called unbind on.
5284 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5285 of $address_data from the recipient verification was clobbered by the
5286 sender verification.
5288 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5289 was its contents. (It was OK if the option was not defined at all.)
5291 11. A "Completed" log line is now written for messages that are removed from
5292 the spool by the -Mrm option.
5294 12. $host_address is now set to the target address during the checking of
5295 ignore_target_hosts.
5297 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5298 being passed; this would have caused $sender_host_name to have been used if
5299 matching the list had actually called for a host name (not very likely,
5300 since this list is usually IP addresses). A host name is now passed as
5303 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5304 code that specifies a non-restarting handler (typically sigaction() in
5305 modern systems) in an attempt to fix a rare and obscure crash bug.
5307 15. Narrowed the window for a race in the daemon that could cause it to ignore
5308 SIGCHLD signals. This is not a major problem, because they are used only to
5309 wake it up if nothing else does.
5311 16. A malformed maildirsize file could cause Exim to calculate negative values
5312 for the mailbox size or file count. Odd effects could occur as a result.
5313 The maildirsize information is now recalculated if the size or filecount
5316 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5317 support for a long time. Removed HAVE_SYS_VFS_H.
5319 18. Updated exipick to current release from John Jetmore.
5321 19. Allow an empty sender to be matched against a lookup in an address list.
5322 Previously the only cases considered were a regular expression, or an
5325 20. Exim went into a mad DNS lookup loop when doing a callout where the
5326 host was specified on the transport, if the DNS lookup yielded more than
5329 21. The RFC2047 encoding function was originally intended for short strings
5330 such as real names; it was not keeping to the 75-character limit for
5331 encoded words that the RFC imposes. It now respects the limit, and
5332 generates multiple encoded words if necessary. To be on the safe side, I
5333 have increased the buffer size for the ${rfc2047: expansion operator from
5336 22. Failure to deliver a bounce message always caused it to be frozen, even if
5337 there was an errors_to setting on the router. The errors_to setting is now
5340 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5341 canonical form (fully expanded) before being placed in
5342 $sender_host_address.
5344 24. Updated eximstats to version 1.33
5346 25. Include certificate and key file names in error message when GnuTLS fails
5347 to set them up, because the GnuTLS error message doesn't include the name
5348 of the failing file when there is a problem reading it.
5350 26. Expand error message when OpenSSL has problems setting up cert/key files.
5353 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5354 (this can affect the format of dates).
5356 28. exim_tidydb, when checking for the continued existence of a message for
5357 which it has found a message-specific retry record, was not finding
5358 messages that were in split spool directories. Consequently, it was
5359 deleting retry records that should have stayed in existence.
5361 29. eximstats updated to version 1.35
5362 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5363 1.35 - bugfix such that pie charts by volume are generated correctly
5365 30. The SPA authentication driver was not abandoning authentication and moving
5366 on to the next authenticator when an expansion was forced to fail,
5367 contradicting the general specification for all authenticators. Instead it
5368 was generating a temporary error. It now behaves as specified.
5370 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5371 (the order specifies the preference for clients). The order is now AES256,
5372 AES128, 3DES, ARCFOUR128.
5374 31. Small patch to Sieve code - explicitly set From: when generating an
5377 32. Exim crashed if a remote delivery caused a very long error message to be
5378 recorded - for instance if somebody sent an entire SpamAssassin report back
5379 as a large number of 550 error lines. This bug was coincidentally fixed by
5380 increasing the size of one of Exim's internal buffers (big_buffer) that
5381 happened as part of the Exiscan merge. However, to be on the safe side, I
5382 have made the code more robust (and fixed the comments that describe what
5385 33. Some experimental protocols are using DNS PTR records for new purposes. The
5386 keys for these records are domain names, not reversed IP addresses. The
5387 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5388 leaves it alone. Component reversal etc. now happens only for IP addresses.
5391 34. The host_aton() function is supposed to be passed a string that is known
5392 to be a valid IP address. However, in the case of IPv6 addresses, it was
5393 not checking this. This is a hostage to fortune. Exim now panics and dies
5394 if the condition is not met. A case was found where this could be provoked
5395 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5396 components; fortuitously, this particular loophole had already been fixed
5397 by change 4.50/55 or 4.44/33 above.
5399 If there are any other similar loopholes, the new check in host_aton()
5400 itself should stop them being exploited. The report I received stated that
5401 data on the command line could provoke the exploit when Exim was running as
5402 exim, but did not say which command line option was involved. All I could
5403 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5404 running as the user.
5407 35. There was a buffer overflow vulnerability in the SPA authentication code
5408 (which came originally from the Samba project). I have added a test to the
5409 spa_base64_to_bits() function which I hope fixes it.
5412 36. The daemon start-up calls getloadavg() while still root for those OS that
5413 need the first call to be done as root, but it missed one case: when
5414 deliver_queue_load_max is set with deliver_drop_privilege. This is
5415 necessary for the benefit of the queue runner, because there is no re-exec
5416 when deliver_drop_privilege is set.
5418 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5419 was in use, was not putting the data itself into the right store pool;
5420 consequently, it could be overwritten for a subsequent message in the same
5421 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5424 38. Sometimes the final signoff response after QUIT could fail to get
5425 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5426 < 0 before doing a fflush(). This bug looks as though it goes back to the
5427 introduction of TLS in release 3.20, but "sometimes" must have been rare
5428 because the tests only now provoked it.
5434 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5435 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5436 Now it returns an integer. A number of calls were still expecting a T/F
5437 return. Fortuitously, in all cases, the tests worked in OK situations,
5438 which is the norm. However, things would have gone wrong on any write
5439 failures on the smtp file descriptor. This function is used when sending
5440 messages over SMTP and also when doing verify callouts.
5442 2. When Exim is called to do synchronous delivery of a locally submitted
5443 message (the -odf or -odi options), it no longer closes stderr before doing
5446 3. Implemented the mua_wrapper option.
5448 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5450 5. Implemented the functions header_remove(), header_testname(),
5451 header_add_at_position(), and receive_remove_recipient(), and exported them
5454 6. If an ACL "warn" statement specified the addition of headers, Exim already
5455 inserted X-ACL-Warn: at the start if there was no header name. However, it
5456 was not making this test for the second and subsequent header lines if
5457 there were newlines in the string. This meant that an invalid header could
5458 be inserted if Exim was badly configured.
5460 7. Allow an ACL "warn" statement to add header lines at the start or after all
5461 the Received: headers, as well as at the end.
5463 8. Added the rcpt_4xx retry error code.
5465 9. Added postmaster_mailfrom=xxx to callout verification option.
5467 10. Added mailfrom=xxxx to the callout verification option, for verify=
5470 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5471 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5473 12. Inserted some casts to stop certain compilers warning when using pointer
5474 differences as field lengths or precisions in printf-type calls (mostly
5475 affecting debugging statements).
5477 13. Added optional readline() support for -be (dynamically loaded).
5479 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5480 same clock tick as a message's arrival, so that its received time was the
5481 same as the "first fail" time on the retry record, and that message
5482 remained on the queue past the ultimate address timeout, every queue runner
5483 would try a delivery (because it was past the ultimate address timeout) but
5484 after another failure, the ultimate address timeout, which should have then
5485 bounced the address, did not kick in. This was a "< instead of <=" error;
5486 in most cases the first failure would have been in the next clock tick
5487 after the received time, and all would be well.
5489 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5490 being recognized when the domain list was tested by the match_domain
5491 condition in an expansion string.
5493 16. Added the ${str2b64: operator.
5495 17. Exim was always calling setrlimit() to set a large limit for the number of
5496 processes, without checking whether the existing limit was already
5497 adequate. (It did check for the limit on file descriptors.) Furthermore,
5498 errors from getrlimit() and setrlimit() were being ignored. Now they are
5499 logged to the main and panic logs, but Exim does carry on, to try to do its
5500 job under whatever limits there are.
5502 18. Imported PCRE 5.0.
5504 19. Trivial typo in log message " temporarily refused connection" (the leading
5507 20. If the log selector return_path_on_delivery was set and an address was
5508 redirected to /dev/null, the delivery process crashed because it assumed
5509 that a return path would always be set for a "successful" delivery. In this
5510 case, the whole delivery is bypassed as an optimization, and therefore no
5513 21. Internal re-arrangement: the function for sending a challenge and reading
5514 a response while authentication was assuming a zero-terminated challenge
5515 string. It's now changed to take a pointer and a length, to allow for
5516 binary data in such strings.
5518 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5520 23. Exim was not respecting finduser_retries when seeking the login of the
5521 uid under which it was called; it was always trying 10 times. (The default
5522 setting of finduser_retries is zero.) Also, it was sleeping after the final
5523 failure, which is pointless.
5525 24. Implemented tls_on_connect_ports.
5527 25. Implemented acl_smtp_predata.
5529 26. If the domain in control=submission is set empty, Exim assumes that the
5530 authenticated id is a complete email address when it generates From: or
5531 Sender: header lines.
5533 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5534 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5535 chown and chgrp in /bin and hostname in /usr/bin.
5537 28. Exim was keeping the "process log" file open after each use, just as it
5538 does for the main log. This opens the possibility of it remaining open for
5539 long periods when the USR1 signal hits a daemon. Occasional processlog
5540 errors were reported, that could have been caused by this. Anyway, it seems
5541 much more sensible not to leave this file open at all, so that is what now
5544 29. The long-running daemon process does not normally write to the log once it
5545 has entered its main loop, and it closes the log before doing so. This is
5546 so that log files can straightforwardly be renamed and moved. However,
5547 there are a couple of unusual error situations where the daemon does write
5548 log entries, and I had neglected to close the log afterwards.
5550 30. The text of an SMTP error response that was received during a remote
5551 delivery was being truncated at 512 bytes. This is too short for some of
5552 the long messages that one sometimes sees. I've increased the limit to
5555 31. It is now possible to make retry rules that apply only when a message has a
5556 specific sender, in particular, an empty sender.
5558 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5559 it possible to be selective about when SMTP synchronization is enforced.
5561 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5563 32. Implemented hosts_connection_nolog.
5565 33. Added an ACL for QUIT.
5567 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5570 35. Added mailbox_size and mailbox_filecount to appendfile.
5572 36. Added control = no_multiline_responses to ACLs.
5574 37. There was a bug in the logic of the code that waits for the clock to tick
5575 in the case where the clock went backwards by a substantial amount such
5576 that the microsecond fraction of "now" was more than the microsecond
5577 fraction of "then" (but the whole seconds number was less).
5579 38. Added support for the libradius Radius client library this is found on
5580 FreeBSD (previously only the radiusclient library was supported).
5586 1. When certain lookups returned multiple values in the form name=value, the
5587 quoting of the values was not always being done properly. Specifically:
5588 (a) If the value started with a double quote, but contained no whitespace,
5590 (b) If the value contained whitespace other than a space character (i.e.
5591 tabs or newlines or carriage returns) it was not quoted.
5592 This fix has been applied to the mysql and pgsql lookups by writing a
5593 separate quoting function and calling it from the lookup code. The fix
5594 should probably also be applied to nisplus, ibase and oracle lookups, but
5595 since I cannot test any of those, I have not disturbed their existing code.
5597 2. A hit in the callout cache for a specific address caused a log line with no
5598 reason for rejecting RCPT. Now it says "Previous (cached) callout
5599 verification failure".
5601 3. There was an off-by-one bug in the queryprogram router. An over-long
5602 return line was truncated at 256 instead of 255 characters, thereby
5603 overflowing its buffer with the terminating zero. As well as fixing this, I
5604 have increased the buffer size to 1024 (and made a note to document this).
5606 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5607 when Exim is waiting for an SMTP response from a remote server, Exim
5608 restarts its select() call on the socket, thereby resetting its timeout.
5609 This is not a problem when such interrupts are rare. Somebody set up a cron
5610 job to run exiwhat every 2 minutes, which is less than the normal select()
5611 timeout (5 or 10 minutes). This meant that the select() timeout never
5612 kicked in because it was always reset. I have fixed this by comparing the
5613 time when an interrupt arrives with the time at the start of the first call
5614 to select(). If more time than the timeout has elapsed, the interrupt is
5615 treated as a timeout.
5617 5. Some internal re-factoring in preparation for the addition of Sieve
5618 extensions (by MH). In particular, the "personal" test is moved to a
5619 separate function, and given an option for scanning Cc: and Bcc: (which is
5620 not set for Exim filters).
5622 6. When Exim created an email address using the login of the caller as the
5623 local part (e.g. when creating a From: or Sender: header line), it was not
5624 quoting the local part when it contained special characters such as @.
5626 7. Installed new OpenBSD configuration files.
5628 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5629 try to make them clearer.
5631 9. Callout options, other than the timeout value, were being ignored when
5632 verifying sender addresses in header lines. For example, when using
5634 verify = header_sender/callout=no_cache
5636 the cache was (incorrectly) being used.
5638 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5639 only the Cygwin environment.
5641 11. When return_path_on_delivery was set as a log selector, if different remote
5642 addresses in the same message used different return paths and parallel
5643 remote delivery occurred, the wrong values would sometimes be logged.
5644 (Whenever a remote delivery process finished, the return path value from
5645 the most recently started remote delivery process was logged.)
5647 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5648 lines when AUTH and/or TLS are in use. This is the "received protocol"
5649 field. Exim used to use "asmtp" for authenticated SMTP, without any
5650 indication (in the protocol name) for TLS use. Now it follows the RFC and
5651 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5652 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5653 names appear in log lines as well as in Received: header lines.
5655 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5656 extensions, and comparison tests, and to fix some bugs.
5658 14. Changes to the "personal" filter test:
5660 (1) The test was buggy in that it was just doing the equivalent of
5661 "contains" tests on header lines. For example, if a user's address was
5662 anne@some.where, the "personal" test would incorrectly be true for
5664 To: susanne@some.where
5666 This test is now done by extracting each address from the header in turn,
5667 and checking the entire address. Other tests that are part of "personal"
5668 are now done using regular expressions (for example, to check local parts
5669 of addresses in From: header lines).
5671 (2) The list of non-personal local parts in From: addresses has been
5672 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5673 taken from the Sieve specification recommendations.
5675 (3) If the message contains any header line starting with "List-" it is
5676 treated as non-personal.
5678 (4) The test for "circular" in the Subject: header line has been removed
5679 because it now seems ill-conceived.
5681 15. Minor typos in src/EDITME comments corrected.
5683 16. Installed latest exipick from John Jetmore.
5685 17. If headers_add on a router specified a text string that was too long for
5686 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5687 of string_sprintf() is now avoided.
5689 18. $message_body_size was not set (it was always zero) when running the DATA
5690 ACL and the local_scan() function.
5692 19. For the "mail" command in an Exim filter, no default was being set for
5693 the once_repeat time, causing a random time value to be used if "once" was
5694 specified. (If the value happened to be <= 0, no repeat happened.) The
5695 default is now 0s, meaning "never repeat". The "vacation" command was OK
5696 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5697 (I found it when inspecting the code).
5699 20. There is now an overall timeout for performing a callout verification. It
5700 defaults to 4 times the callout timeout, which applies to individual SMTP
5701 commands during the callout. The overall timeout applies when there is more
5702 than one host that can be tried. The timeout is checked before trying the
5703 next host. This prevents very long delays if there are a large number of
5704 hosts and all are timing out (e.g. when the network connections are timing
5705 out). The value of the overall timeout can be changed by specifying an
5706 additional sub-option for "callout", called "maxwait". For example:
5708 verify = sender/callout=5s,maxwait=20s
5710 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5711 to the end before writing, but this should make it even safer).
5713 22. Exim was forgetting that it had advertised PIPELINING for the second and
5714 subsequent messages on an SMTP connection. It was also not resetting its
5715 memory on STARTTLS and an internal HELO.
5717 23. When Exim logs an SMTP synchronization error within a session, it now
5718 records whether PIPELINING has been advertised or not.
5720 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5721 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5722 rather than long int.
5724 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5726 26. Added the never_mail option to autoreply.
5732 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5733 crash if the getsockname() call failed; this can happen if a connection is
5734 closed very soon after it is established. The problem was simply in the
5735 order in which certain operations were done, causing Exim to try to write
5736 to the SMTP stream before it had set up the file descriptor. The bug has
5737 been fixed by making things happen in the correct order.
5743 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5744 before the connection was closed, thus losing the rejection response.
5746 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5747 some early Solaris releases, but causes trouble in current releases where
5748 socklen_t is defined.
5750 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5753 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5756 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5757 that releasing the top of it at the end releases what was used for sub-
5758 expansions (unless the block got too big). However, discard this block if
5759 the first thing is a variable or header, so that we can use its block when
5760 it is dynamic (useful for very large $message_headers, for example).
5762 6. Lookups now cache *every* query, not just the most recent. A new, separate
5763 store pool is used for this. It can be recovered when all lookup caches are
5764 flushed. Lookups now release memory at the end of their result strings.
5765 This has involved some general refactoring of the lookup sources.
5767 7. Some code has been added to the store_xxx() functions to reduce the amount
5768 of flapping under certain conditions.
5770 8. log_incoming_interface used to affect only the <= reception log lines. Now
5771 it causes the local interface and port to be added to several more SMTP log
5772 lines, for example "SMTP connection from", and rejection lines.
5774 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5776 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5778 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5779 could be overwritten at the end of the current message (or the start of a
5780 new message if it was set in a HELO ACL). The value is now preserved for
5781 the duration of the SMTP connection.
5783 12. If a transport had a headers_rewrite setting, and a matching header line
5784 contained an unqualified address, that address was qualified, even if it
5785 did not match any rewriting rules. The underlying bug was that the values
5786 of the flags that permit the existence of unqualified sender and recipient
5787 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5788 non-local messages, and by -bnq for local messages) were not being
5789 preserved with the message after it was received.
5791 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5792 "next input=" as part of the text comprising the host identity instead of
5793 the correct text. The code was using the same buffer for two different
5794 strings. However, depending on which order the printing function evaluated
5795 its arguments, the bug did not always show up. Under Linux, for example, my
5796 test suite worked just fine.
5798 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5799 doesn't work with some older versions of Perl. It has been changed to "my",
5800 which in any case is probably the better facility to use.
5802 15. A really picky compiler found some instances of statements for creating
5803 error messages that either had too many or two few arguments for the format
5806 16. The size of the buffer for calls to the DNS resolver has been increased
5807 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5808 for addresses that have a lot of PTR records. This alleviates a problem; it
5809 does not fully solve it.
5811 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5812 buffer now truncates the list and logs the incident, which is the same
5813 action as happens when Exim is looking up a host name and its aliases.
5814 Previously in this situation something unpredictable would happen;
5815 sometimes it was "internal error: store_reset failed".
5817 18. If a server dropped the connection unexpectedly when an Exim client was
5818 using GnuTLS and trying to read a response, the client delivery process
5819 crashed while trying to generate an error log message.
5821 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5822 string, for example:
5824 warn message = H1: something\nH2: something
5826 the text was added as a single header line from Exim's point of view
5827 though it ended up OK in the delivered message. However, searching for the
5828 second and subsequent header lines using $h_h2: did not work. This has been
5829 fixed. Similarly, if a system filter added multiple headers in this way,
5830 the routers could not see them.
5832 20. Expanded the error message when iplsearch is called with an invalid key to
5833 suggest using net-iplsearch in a host list.
5835 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5836 ACLs are no longer actually imposed (and a message to that effect is
5839 22. If a "gecos" field in a passwd entry contained escaped characters, in
5840 particular, if it contained a \" sequence, Exim got it wrong when building
5841 a From: or a Sender: header from that name. A second bug also caused
5842 incorrect handling when an unquoted " was present following a character
5843 that needed quoting.
5845 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5846 was not being matched caselessly.
5848 24. Arranged for all hyphens in the exim.8 source to be escaped with
5851 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5852 properly. Recipient callout cache records were still being keyed to include
5853 the sender, even when use_sender was set false. This led to far more
5854 callouts that were necessary. The sender is no longer included in the key
5855 when use_sender is false.
5857 26. Added "control = submission" modifier to ACLs.
5859 27. Added the ${base62d: operator to decode base 62 numbers.
5861 28. dnsdb lookups can now access SRV records.
5863 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5864 the configuration file.
5866 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5867 (-v) mode. This makes the output for a verbose queue run more intelligible.
5869 31. Added a use_postmaster feature to recipient callouts.
5871 32. Added the $body_zerocount variable, containing the number of binary zero
5872 bytes in the message body.
5874 33. The time of last modification of the "new" subdirectory is now used as the
5875 "mailbox time last read" when there is a quota error for a maildir
5878 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5880 35. Added +ignore_unknown as a special item in host lists.
5882 36. Code for decoding IPv6 addresses in host lists is now included, even if
5883 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5884 address was recognized as an IP address, but was then not correctly decoded
5885 into binary, causing unexpected and incorrect effects when compared with
5892 1. Very minor rewording of debugging text in manualroute to say "list of
5893 hosts" instead of "hostlist".
5895 2. If verify=header_syntax was set, and a header line with an unqualified
5896 address (no domain) and a large number of spaces between the end of the
5897 name and the colon was received, the reception process suffered a buffer
5898 overflow, and (when I tested it) crashed. This was caused by some obsolete
5899 code that should have been removed. The fix is to remove it!
5901 3. When running in the test harness, delay a bit after writing a bounce
5902 message to get a bit more predictability in the log output.
5904 4. Added a call to search_tidyup() just before forking a reception process. In
5905 theory, someone could use a lookup in the expansion of smtp_accept_max_
5906 per_host which, without the tidyup, could leave open a database connection.
5908 5. Added the variables $recipient_data and $sender_data which get set from a
5909 lookup success in an ACL "recipients" or "senders" condition, or a router
5910 "senders" option, similar to $domain_data and $local_part_data.
5912 6. Moved the writing of debug_print from before to after the "senders" test
5915 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5916 problems for message scanning, either using a data ACL, or using
5917 local_scan() because the Received: header was not generated till after they
5918 were called (in order to set the time as the time of reception completion).
5919 I have revised the way this works. The header is now generated after the
5920 body is received, but before the ACL or local_scan() are called. After they
5921 are run, the timestamp in the header is updated.
5927 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5928 before starting a queue runner without re-exec. This happened only when
5929 deliver_drop_privilege was set or when the Exim user was set to root. The
5930 effect of the bug was that timeouts during subsequent deliveries caused
5931 crashes instead of being properly handled. The handler is now left at its
5932 default (and expected) setting.
5934 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5935 message, again when deliver_drop_privilege is set or Exim is run as root.
5936 The bug described in (1) was not present in this case, but the tidying up
5937 of the other signals was missing. I have made the two cases consistent.
5939 3. The ignore_target_hosts setting on a manualroute router was being ignored
5940 for hosts that were looked up using the /MX notation.
5942 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5945 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5946 operated on the sender address. After changing the $sender_address to <>
5947 for the sender address verify, Exim was re-instated it as the original
5948 (before rewriting) address, but remembering that it had rewritten it, so it
5949 wasn't rewriting it again. This bug also had the effect of breaking the
5950 sender address verification caching when the sender address was rewritten.
5952 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5953 This has been changed so that if the ip literal address matches
5954 ignore_target_hosts, the router declines.
5956 7. Added expansion conditions match_domain, match_address, and match_local_
5957 part (NOT match_host).
5959 8. The placeholder for the Received: header didn't have a length field set.
5961 9. Added code to Exim itself and to exim_lock to test for a specific race
5962 condition that could lead to file corruption when using MBX delivery. The
5963 issue is with the lockfile that is created in /tmp. If this file is removed
5964 after a process has opened it but before that process has acquired a lock,
5965 there is the potential for a second process to recreate the file and also
5966 acquire a lock. This could lead to two Exim processes writing to the file
5967 at the same time. The added code performs the same test as UW imapd; it
5968 checks after acquiring the lock that its file descriptor still refers to
5969 the same named file.
5971 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5972 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5975 11. Added the smtp_active_hostname option. If used, this will typically be made
5976 to depend on the incoming interface address. Because $interface_address is
5977 not set up until the daemon has forked a reception process, error responses
5978 that can happen earlier (such as "too many connections") no longer contain
5981 12. If an expansion in a condition on a "warn" statement fails because a lookup
5982 defers, the "warn" statement is abandoned, and the next ACL statement is
5983 processed. Previously this caused the whole ACL to be aborted.
5985 13. Added the iplsearch lookup type.
5987 14. Added ident_timeout as a log selector.
5989 15. Added tls_certificate_verified as a log selector.
5991 16. Added a global option tls_require_ciphers (compare the smtp transport
5992 option of the same name). This controls incoming TLS connections.
5994 17. I finally figured out how to make tls_require_ciphers do a similar thing
5995 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5996 before starting the TLS session.
5998 18. Tabs are now shown as \t in -bP output.
6000 19. If the log selector return_path_on_delivery was set, Exim crashed when
6001 bouncing a message because it had too many Received: header lines.
6003 20. If two routers both had headers_remove settings, and the first one included
6004 a superfluous trailing colon, the final name in the first list and the
6005 first name in the second list were incorrectly joined into one item (with a
6006 colon in the middle).
6012 1. Added -C and -D options to the exinext utility, mainly to make it easier
6013 to include in the automated testing, but these could be helpful when
6014 multiple configurations are in use.
6016 2. The exinext utility was not formatting the output nicely when there was
6017 an alternate port involved in the retry record key, nor when there was a
6018 message id as well (for retries that were specific to a specific message
6019 and a specific host). It was also confused by IPv6 addresses, because of
6020 the additional colons they contain. I have fixed the IPv4 problem, and
6021 patched it up to do a reasonable job for IPv6.
6023 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6024 delivery, the log line now contains "pipelined" if PIPELINING was used.
6026 4. An SMTP transport process used to panic and die if the bind() call to set
6027 an explicit outgoing interface failed. This has been changed; it is now
6028 treated in the same way as a connect() failure.
6030 5. A reference to $sender_host_name in the part of a conditional expansion
6031 that was being skipped was still causing a DNS lookup. This no longer
6034 6. The def: expansion condition was not recognizing references to header lines
6035 that used bh_ and bheader_.
6037 7. Added the _cache feature to named lists.
6039 8. The code for checking quota_filecount in the appendfile transport was
6040 allowing one more file than it should have been.
6042 9. For compatibility with Sendmail, the command line option
6050 and sets the incoming protocol and host name (for trusted callers). The
6051 host name and its colon can be omitted when only the protocol is to be set.
6052 Note the Exim already has two private options, -pd and -ps, that refer to
6053 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6054 "s", but I don't think that's a major issue.
6056 10. A number of refactoring changes to the code, none of which should affect
6059 (a) The number of logging options was getting close to filling up the
6060 32-bit word that was used as a bit map. I have split them into two classes:
6061 those that are passed in the argument to log_write(), and those that are
6062 only ever tested independently outside of that function. These are now in
6063 separate 32-bit words, so there is plenty of room for expansion again.
6064 There is no change in the user interface or the logging behaviour.
6066 (b) When building, for example, log lines, the code previously used a
6067 macro that called string_cat() twice, in order to add two strings. This is
6068 not really sufficiently general. Furthermore, there was one instance where
6069 it was actually wrong because one of the argument was used twice, and in
6070 one call a function was used. (As it happened, calling the function twice
6071 did not affect the overall behaviour.) The macro has been replaced by a
6072 function that can join an arbitrary number of extra strings onto a growing
6075 (c) The code for expansion conditions now uses a table and a binary chop
6076 instead of a serial search (which was left over from when there were very
6077 few conditions). Also, it now recognizes conditions like "pam" even when
6078 the relevant support is not compiled in: a suitably worded error message is
6079 given if an attempt is made to use such a condition.
6081 11. Added ${time_interval:xxxxx}.
6083 12. A bug was causing one of the ddress fields not to be passed back correctly
6084 from remote delivery subprocesses. The field in question was not being
6085 subsequently used, so this caused to problems in practice.
6087 13. Added new log selectors queue_time and deliver_time.
6089 14. Might have fixed a bug in maildirsizefile handling that threw up
6090 "unexpected character" debug warnings, and recalculated the data
6091 unnecessarily. In any case, I expanded the warning message to give more
6094 15. Added the message "Restricted characters in address" to the statements in
6095 the default ACL that block characters like @ and % in local parts.
6097 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6098 Three changes have been made:
6100 (a) There was a serious bug; a negative response to MAIL caused the whole
6101 recipient domain to be cached as invalid, thereby blocking all messages
6102 to all local parts at the same domain, from all senders. This bug has
6103 been fixed. The domain is no longer cached after a negative response to
6104 MAIL if the sender used is not empty.
6106 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6109 (c) A new callout option, "use_sender" has been added for people who want
6110 the modified behaviour.
6116 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6119 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6120 indeed breaks things for older releases.
6122 3. Added additional logging to the case where there is a problem reading data
6123 from a filter that is running in a subprocess using a pipe, in order to
6124 try to track down a specific problem.
6126 4. Testing facility fudge: when running in the test harness and attempting
6127 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6128 getting "No route to host". Convert this to a timeout.
6130 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6133 6. Some OS don't have socklen_t but use size_t instead. This affects the
6134 fifth argument of getsockopt() amongst other things. This is now
6135 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6136 can be set for individual OS. I have set it for SunOS5, OSF1, and
6137 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6138 some earlier ones do not.
6140 7. Change 4.30/15 was not doing the test caselessly.
6142 8. The standard form for an IPv6 address literal was being rejected by address
6143 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6144 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6145 this, as well as the form without the "IPv6" on the front (but only when
6146 address literals are enabled, of course).
6148 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6150 10. Exim crashed if a message with an empty sender address specified by -f
6151 encountered a router with an errors_to setting. This could be provoked only
6152 by a command such as
6156 where an empty string was supplied; "<>" did not hit this bug.
6158 11. Installed PCRE release 4.5.
6160 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6161 remained set. It is now erased.
6163 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6164 times from message ids (which are base 36 rather than the normal 62).
6166 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6167 were being counted as actual protocol errors, and logged if the log
6168 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6169 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6170 and DATA following a set of rejected RCPTs do not count as protocol errors.
6171 In other words, Exim assumes they were pipelined, though this may not
6172 actually be the case. Of course, in all cases the client gets an
6173 appropriate error code.
6175 15. If a lookup fails in an ACL condition, a message about the failure may
6176 be available; it is used if testing the ACL cannot continue, because most
6177 such messages specify what the cause of the deferral is. However, some
6178 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6179 that caused an old message to be retained and used if a later statement
6180 caused a defer, replacing the real cause of the deferral.
6182 16. If an IP address had so many PTR records that the DNS lookup buffer
6183 was not large enough to hold them, Exim could crash while trying to process
6184 the truncated data. It now detects and logs this case.
6186 17. Further to 4.21/58, another change has been made: if (and only if) the
6187 first line of a message (the first header line) ends with CRLF, a bare LF
6188 in a subsequent header line has a space inserted after it, so as not to
6189 terminate the header.
6191 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6192 unnecessarily, used atoi() instead of strtol(), and didn't check the
6193 termination when getting file sizes from file names by regex.
6195 19. Completely re-implemented the support for maildirsize files, in the light
6196 of a number of problems with the previous contributed implementation
6197 (4.30/29). In particular:
6199 . If the quota is zero, the maildirsize file is maintained, but no quota is
6202 . If the maildir directory does not exist, it is created before any attempt
6203 to write a maildirsize file.
6205 . The quota value in the file is just a cache; if the quota is changed in
6206 the transport, the new value overrides.
6208 . A regular expression is available for excluding directories from the
6211 20. The autoreply transport checks the characters in options that define the
6212 message's headers; it allows continued headers, but it was checking with
6213 isspace() after an embedded newline instead of explicitly looking for a
6216 21. If all the "regular" hosts to which an address was routed had passed their
6217 expiry times, and had not reached their retry times, the address was
6218 bounced, even if fallback hosts were defined. Now Exim should go on to try
6221 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6222 equivalent code in the SMTP transport. Some hosts send humungous responses
6223 to HELO/EHLO, more than 1024 it seems.
6225 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6226 gives compiler warnings in some environments. I've now done it "properly",
6229 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6230 (because of problems with the built-in one) was declared to return uschar *
6231 instead of char *, causing compiler failure.
6233 25. Fixed a file descriptor leak when processing alias/forward files.
6235 26. Fixed a minor format string issue in dbfn.c.
6237 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6239 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6240 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6243 29. When a sender address is verified, it is cached, to save repeating the test
6244 when there is more than one recipient in a message. However, when the
6245 verification involves a callout, it is possible for different callout
6246 options to be set for different recipients. It is too complicated to keep
6247 track of this in the cache, so now Exim always runs a verification when a
6248 callout is required, relying on the callout cache for the optimization.
6249 The overhead is duplication of the address routing, but this should not be
6252 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6253 to be verified with callout=postmaster, and the main callout worked but the
6254 postmaster check failed, the verification correctly failed. However, if a
6255 subsequent RCPT command asked for sender verification *without* the
6256 postmaster check, incorrect caching caused this verification also to fail,
6259 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6260 it was not caching the DNS options (qualify_single, search_parents) that
6261 were used when the lookup failed. A subsequent lookup with different
6262 options therefore always gave the same answer, though there were cases
6263 where it should not have. (Example: a "domains = !$mx_any" option on a
6264 dnslookup router: the "domains" option is always processed without any
6265 widening, but the router might have qualify_single set.) Now Exim uses the
6266 cached value only when the same options are set.
6268 32. Added John Jetmore's "exipick" utility to the distribution.
6270 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6271 than a timeout (e.g. a certificate is required, and is not provided), an
6272 Exim server now closes the connection immediately. Previously it waited for
6273 the client to close - but if the client is SSL, it seems that they each
6274 wait for each other, leading to a delay before one of them times out.
6276 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6277 maintained 0.8.x compatibility because I don't think many are using it, and
6278 it is clearly obsolete.
6280 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6283 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6284 client certificate was expired. A simple patch fixes this, though I don't
6285 understand the full logic of why the verify callback is called multiple
6288 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6289 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6290 which causes problems with some clients (such as the Certicom SSL Plus
6291 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6292 disables the coutermeasure allowing Eudora to connect."
6294 38. Exim was not checking that a write() to a log file succeeded. This could
6295 lead to Bad Things if a log got too big, in particular if it hit a file
6296 size limit. Exim now panics and dies if it cannot write to a log file, just
6297 as it does if it cannot open a log file.
6299 39. Modified OS/Makefile-Linux so that it now contains
6301 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6303 The two -D definitions ensure that Exim is compiled with large file
6304 support, which makes it possible to handle log files that are bigger than
6307 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6308 instance) a domain was checked against a named list that involved a lookup,
6309 causing $domain_data to be set, then another domain was checked against the
6310 same list, then the first domain was re-checked, the value of $domain_data
6311 after the final check could be wrong. In particular, if the second check
6312 failed, it could be set empty. This bug probably also applied to
6315 41. The strip_trailing_dot option was not being applied to the address given
6316 with the -f command-line option.
6318 42. The code for reading a message's header from the spool was incrementing
6319 $received_count, but never initializing it. This meant that the value was
6320 incorrect (doubled) while delivering a message in the same process in which
6321 it was received. In the most common configuration of Exim, this never
6322 happens - a fresh exec is done - but it can happen when
6323 deliver_drop_privilege is set.
6325 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6326 it now includes up to 150 characters of the unexpected data in the log
6329 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6330 and building data strings. The size of both of these buffers was 10 000
6331 bytes - far larger than anybody would *ever* want, thought I. Needless to
6332 say, somebody hit the limit. I have increased the maximum line length to
6333 20 000 and the maximum data length of concatenated lines to 100 000. I have
6334 also fixed two bugs, because there was no checking on these buffers. Tsk,
6335 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6336 buffer is too small.
6338 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6339 lsearch lookups. Now it does.
6341 46. When parsing a route_list item in a manualroute router, a fixed-length
6342 buffer was used for the list of hosts. I made this 1024 bytes long,
6343 thinking that nobody would ever have a list of hosts that long. Wrong.
6344 Somebody had a whole pile of complicated expansion conditions, and the
6345 string was silently truncated, leading to an expansion error. It turns out
6346 that it is easier to change to an unlimited length (owing to other changes
6347 that have happened since this code was originally written) than to build
6348 structure for giving a limitation error. The length of the item that
6349 expands into the list of hosts is now unlimited.
6351 47. The lsearch lookup could not handle data where the length of text line was
6352 more than 4095 characters. Such lines were truncated, leading to shortened
6353 data being returned. It should now handle lines of any length.
6355 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6356 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6359 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6360 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6361 no longer happens in comment lines. A list of replacements is now placed
6362 at the head of all of the source files, except those whose only change is
6363 to replace PERL_COMMAND in the very first #! line.
6365 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6366 messages on the queue, with a bottom-up merge sort, using code contributed
6367 by Michael Haardt. This should make operations like -bp somewhat faster on
6368 large queues. It won't affect queue runners, except when queue_run_in_order
6371 51. Installed eximstats 1.31 in the distribution.
6373 52. Added support for SRV lookups to the dnslookup router.
6375 53. If an ACL referred to $message_body or $message_body_end, the value was not
6376 reset for any messages that followed in the same SMTP session.
6378 54. The store-handling optimization for building very long strings was not
6379 differentiating between the different store pools. I don't think this
6380 actually made any difference in practice, but I've tidied it.
6382 55. While running the routers to verify a sender address, $sender_address
6383 was still set to the sender address. This is wrong, because when routing to
6384 send a bounce to the sender, it would be empty. Therefore, I have changed
6385 it so that, while verifying a sender address, $sender_address is set to <>.
6386 (There is no change to what happens when verifying a recipient address.)
6388 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6389 target A or AAAA records (if not already returned) without resetting the
6390 qualify_single or search_parents options of the DNS resolver. These are
6391 inappropriate in this case because the targets of MX and SRV records must
6392 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6393 target that, when qualified, matched something in the local domain. These
6394 two options are now turned off when doing these lookups.
6396 57. It seems that at least some releases of Reiserfs (which does not have the
6397 concept of a fixed number of inodes) returns zero and not -1 for the
6398 number of available inodes. This interacted badly with check_spool_inodes,
6399 which assumed that -1 was the "no such thing" setting. What I have done is
6400 to check that the total number of inodes is greater than zero before doing
6401 the test of how many are available.
6403 58. When a "warn" ACL statement has a log_message modifier, the message is
6404 remembered, and not repeated. This is to avoid a lot of repetition when a
6405 message has many recipients that cause the same warning to be written.
6406 However, Exim was preserving the list of already written lines for an
6407 entire SMTP session, which doesn't seem right. The memory is now reset if a
6408 new message is started.
6410 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6411 debugging output unless log_rewrite was also set.
6413 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6414 of (int)(handle) when we know that handle contains (void *)(-1).
6416 61. The Exim daemon panic-logs an error return when it closes the incoming
6417 connection. However "connection reset by peer" seems to be common, and
6418 isn't really an error worthy of noting specially, so that particular error
6421 62. When Exim is trying to find all the local interfaces, it used to panic and
6422 die if the ioctl to get the interface flags failed. However, it seems that
6423 on at least one OS (Solaris 9) it is possible to have an interface that is
6424 included in the list of interfaces, but for which you get a failure error
6425 for this call. This happens when the interface is not "plumbed" into a
6426 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6427 failure of the "get flags" call assumes that the interface is down.
6429 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6430 makes life easier for people who are doing arithmetic on fields extracted
6431 from dates, where you often get leading zeros that should not be
6432 interpreted as octal.
6434 64. Added qualify_domain to the redirect router, to override the global
6437 65. If a pathologically long header line contained very many addresses (the
6438 report of this problem mentioned 10 000) and each of them was rewritten,
6439 Exim could use up a very large amount of memory. (It kept on making new
6440 copies of the header line as it rewrote, and never released the old ones.)
6441 At the expense of a bit more processing, the header rewriting function has
6442 been changed so that it no longer eats memory in this way.
6444 66. The generation of the Received: header has been moved from the time that a
6445 message starts to be received, to the time that it finishes. The timestamp
6446 in the Received: header should now be very close to that of the <= log
6447 line. There are two side-effects of this change:
6449 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6450 logged header lines no longer include the local Received: line, because
6451 it has not yet been created. The same applies to a copy of the message
6452 that is returned to a non-SMTP sender when a message is rejected.
6454 (b) When a filter file is tested using -bf, no additional Received: header
6455 is added to the test message. After some thought, I decided that this
6458 This change does not affect the value of $received_for. It is still set
6459 after address rewriting, but before local_scan() is called.
6461 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6463 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6464 gave an unhelpful panic error message, and a defer error. I have managed to
6465 change this behaviour so that it now rejects any supplied certificate,
6466 which seems right, as the list of acceptable certificates is empty.
6468 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6469 gave an unhelpful defer error. I have not managed to make this reject any
6470 supplied certificates, but the error message it gives is "no certificate
6471 supplied", which is not helpful.
6473 70. exigrep's output now also includes lines that are not associated with any
6474 message, but which match the given pattern. Implemented by a patch from
6475 Martin Sluka, which also tidied up the Perl a bit.
6477 71. Recipient callout verification, like sender verification, was using <> in
6478 the MAIL FROM command. This isn't really the right thing, since the actual
6479 sender may affect whether the remote host accepts the recipient or not. I
6480 have changed it to use the actual sender in the callout; this means that
6481 the cache record is now keyed on a recipient/sender pair, not just the
6482 recipient address. There doesn't seem to be a real danger of callout loops,
6483 since a callout by the remote host to check the sender would use <>.
6484 [SEE ABOVE: changed after hitting problems.]
6486 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6487 temporary errors. However, in the case of such a code being given after
6488 the end of a data transmission (i.e. after ".") Exim was failing to write
6489 a retry record for the message. (Yes, there was some broken host that was
6490 actually sending 8xx at this point.)
6492 73. An unknown lookup type in a host list could cause Exim to panic-die when
6493 the list was checked. (An example that provoked this was putting <; in the
6494 middle of a list instead of at the start.) If this happened during a DATA
6495 ACL check, a -D file could be left lying around. This kind of configuration
6496 error no longer causes Exim to die; instead it causes a defer error. The
6497 incident is still logged to the main and panic logs.
6499 74. Buglet left over from Exim 3 conversion. The message "too many messages
6500 in one connection" was written to the rejectlog but not the mainlog, except
6501 when address rewriting (yes!) was being logged.
6503 75. Added write_rejectlog option.
6505 76. When a system filter was run not as root (that is, when system_filter_user
6506 was set), the values of the $n variables were not being returned to the
6507 main process; thus, they were not subsequently available in the $sn
6510 77. Added +return_path_on_delivery log selector.
6512 78. A connection timeout was being treated differently from recipients deferred
6513 when testing hosts_max_try with a message that was older than the host's
6514 retry timeout. (The host should not be counted, thus allowing all hosts to
6515 be tried at least once before bouncing.) This may have been the cause of an
6516 occasionally reported bug whereby a message would remain on the queue
6517 longer than the retry timeout, but would be bounced if a delivery was
6518 forced. I say "may" because I never totally pinned down the problem;
6519 setting up timeout/retry tests is difficult. See also the next item.
6521 79. The ultimate address timeout was not being applied to errors that involved
6522 a combination of host plus message (for example, a timeout on a MAIL
6523 command). When an address resolved to a number of possible hosts, and they
6524 were not all tried for each delivery (e.g. because of hosts_max_try), a
6525 message could remain on the queue longer than the retry timeout.
6527 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6530 81. Fixed an obscure SMTP outgoing bug which required at least the following
6531 conditions: (a) there was another message waiting for the same server;
6532 (b) the server returned 5xx to all RCPT commands in the first message so
6533 that the message was not completed; (c) the server dropped the connection
6534 or gave a negative response to the RSET that Exim sends to abort the
6535 transaction. The observed case was a dropped connection after DATA that had
6536 been sent in pipelining mode. That is, the server had advertised PIPELINING
6537 but was not implementing it correctly. The effect of the bug was incorrect
6538 behaviour, such as trying another host, and this could lead to a crash.
6544 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6545 and daemon.c were passed as pointers to ints; they should have been
6546 pointers to socklen_t variables (which are typically unsigned ints).
6548 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6551 3. Fixed a really odd bug that affected only the testing scheme; patching a
6552 certain fixed string in the binary changed the value of another string that
6553 happened to be identical to the end of the original first string.
6555 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6556 name", it returns that address as the IP address. On some operating
6557 systems (e.g. Solaris), it also passes back the IP address string as the
6558 "host name". However, on others (e.g. Linux), it passes back an empty
6559 string. Exim wasn't checking for this, and was changing the host name to an
6560 empty string, assuming it had been canonicalized.
6562 5. Although rare, it is permitted to have more than one PTR record for a given
6563 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6564 all the names associated with an address, because they do in Solaris.
6565 However, it seems that they do not in Linux for data that comes from the
6566 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6567 I found this out when I moved to a new Linux workstation and tried to run
6568 the Exim test suite.
6570 To get round this problem I have changed the code so that it now does its
6571 own call to the DNS to look up PTR records when searching for a host name.
6572 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6573 addresses that are only in /etc/hosts are still found.
6575 This behaviour is, however, controlled by an option called host_lookup_
6576 order, which defaults to "bydns:byaddr". If people want to use the other
6577 order, or indeed, just use one or the other means of lookup, they can
6578 specify it in this variable.
6580 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6581 some operating systems, this comes back from gethostbyaddr() as an empty
6582 string, and this is what Exim used to test for. However, it seems that in
6583 other systems, "." is yielded. Exim now tests for this case too.
6585 7. The values of check_spool_space and check_log_space are now held internally
6586 as a number of kilobytes instead of an absolute number of bytes. If a
6587 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6588 kilobyte. This means that much larger values can be stored.
6590 8. Exim monitor: an attempt to get the action menu when not actually pointing
6591 at a message produces an empty menu entitled "No message selected". This
6592 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6593 no entries in it ("Shell widget menu has zero width and/or height"). So I
6594 have added a single, blank menu entry in this case.
6596 9. Added ${quote_local_part.
6598 10. MIME decoding is now applied to the contents of Subject: header lines when
6601 11. Now that a reference to $sender_host_address automatically causes a reverse
6602 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6603 host lookup before query-style lookups in lists that might use this
6604 variable. This has therefore been abolished, and the "net-" prefix is no
6605 longer necessary for query-style lookups.
6607 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6608 have been a typo for LFLAGS, so it has been changed.
6610 13. The install script calls Exim with "-C /dev/null" in order to find the
6611 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6612 to be output. However, since Exim outputs its version number before the
6613 error, it didn't break the script. It just looked ugly. I fixed this by
6614 always allowing "-C /dev/null" if the caller is root.
6616 14. Ignore overlarge ACL variable number when reading spool file - insurance
6617 against a later release with more variables having written the file.
6619 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6620 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6621 this, as well as the form without the "IPv6" on the front.
6623 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6624 OS/Makefile-Darwin file.
6626 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6627 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6629 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6630 variable. However, some OS use ints for inodes. I've added cast to long int
6631 to get rid of the compiler warning.
6633 19. I had forgotten to lock out "/../" in configuration file names when
6634 ALT_CONFIG_PREFIX was set.
6636 20. Routers used for verification do not need to specify transports. However,
6637 if such a router generated a host list, and callout was configured, Exim
6638 crashed, because it could not find a port number from the (non-existent)
6639 transport. It now assumes port 25 in this circumstance.
6641 21. Added the -t option to exigrep.
6643 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6644 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6645 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6646 them is set, LOOKUP_LSEARCH is forced.
6648 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6650 24. Added sender and host information to the "rejected by local_scan()" log
6651 line; previously there was no indication of these.
6653 25. Added .include_if_exists.
6655 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6656 Linux. It turns out that not all file systems support this. Apparently some
6657 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6658 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6659 not supported on the file descriptor, is now ignored when Exim is trying to
6660 sync a directory. This applies only to Linux.
6662 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6664 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6665 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6668 29. Added support for maildirsize files from supplied patch (modified a bit).
6670 30. The use of :fail: followed by an empty string could lead Exim to respond to
6671 sender verification failures with (e.g.):
6673 550 Verification failed for <xxx>
6674 550 Sender verify failed
6676 where the first response line was missing the '-' that indicates it is not
6677 the final line of the response.
6679 31. The loop for finding the name of the user that called Exim had a hardwired
6680 limit of 10; it now uses the value of finduser_retries, which is used for
6681 all other user lookups.
6683 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6686 33. Exim was neglecting to zero errno before one call of strtol() when
6687 expanding a string and expecting an integer value. On some systems this
6688 resulted in spurious "integer overflow" errors. Also, it was casting the
6689 result into an int without checking.
6691 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6692 did not work. The code looks as if it has *never* worked, though it appears
6693 to have been documented since at least release 1.62. I have made it work.
6695 35. The "timeout_DNS" error in retry rules, also documented since at least
6696 1.62, also never worked. As it isn't clear exactly what this means, and
6697 clearly it isn't a major issue, I have abolished the feature by treating it
6698 as "timeout", and writing a warning to the main and panic logs.
6700 36. The display of retry rules for -brt wasn't always showing the error code
6703 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6704 timeout_connect_A, timeout_connect_MX.
6706 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6707 to the empty sender.
6709 39. The daemon was not analysing the content of -oX till after it had closed
6710 stderr and disconnected from the controlling terminal. This meant that any
6711 syntax errors were only noted on the panic log, and the return code from
6712 the command was 0. By re-arranging the code a little, I've made the
6713 decoding happen first, so such errors now appear on stderr, and the return
6714 code is 1. However, the actual setting up of the sockets still happens in
6715 the disconnected process, so errors there are still only recorded on the
6718 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6719 connections (as happens on some IP stacks) was logged at start up time as
6720 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6721 it from "IPv6 and IPv4", which means that two separate sockets are being
6724 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6725 says whether AF_INET or AF_INET6 was passed as an argument.
6727 42. Exiwhat output was messed up when time zones were included in log
6730 43. Exiwhat now gives more information about the daemon's listening ports,
6731 and whether -tls-on-connect was used.
6733 44. The "port" option of the smtp transport is now expanded.
6735 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6736 silently ignored. Now an error message is written to the main and panic
6739 46. There's a new ACL modifier called "logwrite" which writes to a log file
6740 as soon as it is encountered.
6742 47. Added $local_user_uid and $local_user_gid at routing time.
6744 48. Exim crashed when trying to verify a sender address that was being
6747 49. Exim was recognizing only a space character after ".include". It now also
6748 recognizes a tab character.
6750 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6751 extracting the relevant information from the specification. The man page no
6752 longer contains scrambled data for the -d option, and I've added a section
6753 at the front about calling Exim under different names.
6755 51. Added "extra_headers" argument to the "mail" command in filter files.
6757 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6760 53. Installed eximstats 1.29.
6762 54. Added transport_filter_timeout as a generic transport option.
6764 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6765 Cc: header lines. This was required by RFC 822, but it not required by RFC
6768 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6769 incoming messages that did not have them. Now it does so only if the
6770 message originates locally, that is, if there is no associated remote host
6771 address. When Resent- header lines are present, this applies to the Resent-
6772 lines rather than the non-Resent- lines.
6774 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6775 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6777 58. Messages for configuration errors now include the name of the main
6778 configuration file - useful now that there may be more than one file in a
6779 list (.included file names were always shown).
6781 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6782 for those rare installations that do not start the daemon as root or run it
6783 setuid root. I've cut out the call to initgroups() if the daemon is not
6786 60. The Exim user and group can now be bound into the binary as text strings
6787 that are looked up at the start of Exim's processing.
6789 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6791 62. Added $mailstore_basename variable.
6793 63. Installed patch to sieve.c from Michael Haardt.
6795 64. When Exim failed to open the panic log after failing to open the main log,
6796 the original message it was trying to log was written to stderr and debug
6797 output, but if they were not available (the usual case in production), it
6798 was lost. Now it is written to syslog before the two lines that record the
6799 failures to open the logs.
6801 65. Users' Exim filters run in subprocesses under the user's uid. It is
6802 possible for a "deliver" command or an alias in a "personal" command to
6803 provoke an address rewrite. If logging of address rewriting is configured,
6804 this fails because the process is not running as root or exim. There may be
6805 a better way of dealing with this, but for the moment (because 4.30 needs
6806 to be released), I have disabled address rewrite logging when running a
6807 filter in a non-root, non-exim process.
6813 1. The buildconfig auxiliary program wasn't quoting the value set for
6814 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6815 not defined. This bug was masked in 4.22 by the effect that was fixed in
6818 2. Some messages that were rejected after a message id was allocated were
6819 shown as "incomplete" by exigrep. It no longer does this for messages that
6820 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6822 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6823 have allow_domain_literals set, the ID did not get logged in the <= line.
6824 Domain literals are now always recognized in Message-ID: header lines.
6826 4. The first argument for a ${extract expansion item is the key name or field
6827 number. Leading and trailing spaces in this item were not being ignored,
6828 causing some misleading effects.
6830 5. When deliver_drop_privilege was set, single queue runner processes started
6831 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6832 same command in the process it spins off) were not dropping privilege.
6834 6. When the daemon running as "exim" started a queue runner, it always
6835 re-executed Exim in the spun-off process. This is a waste of effort when
6836 deliver_drop_privilege is set. The new process now just calls the
6837 queue-runner function directly.
6843 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6846 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6847 ignored. Though the use of -oP was forcing the writing of a pid file, it
6848 was always written to the default place.
6850 3. If the message "no IP address found for host xxxx" is generated during
6851 incoming verification, it is now followed by identification of the incoming
6852 connection (so you can more easily find what provoked it).
6854 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6856 5. Added some features to "harden" Exim a bit more against certain attacks:
6858 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6859 be put in Local/Makefile. This is like the never_users runtime option,
6860 but it cannot be overridden. The default setting is "root".
6862 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6863 prefix string with which any file named in a -C command line option
6866 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6867 is retained for -C and -D only if the caller of Exim is root. Without
6868 it, the exim user may also use -C and -D and retain privilege.
6870 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6871 command line option is disabled.
6873 6. Macro names set by the -D option must start with an upper case letter, just
6874 like macro names defined in the configuration file.
6876 7. Added "dereference=" facility to LDAP.
6878 8. Two instances of the typo "uknown" in the source files are fixed.
6880 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6881 the Configure-Makefile script screwed up while processing it.
6883 10. Incorporated PCRE 4.4.
6885 11. The SMTP synchronization check was not operating right at the start of an
6886 SMTP session. For example, it could not catch a HELO sent before the client
6887 waited for the greeting. There is now a check for outstanding input at the
6888 point when the greeting is written. Because of the duplex, asynchronous
6889 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6890 way, but not yet received, when the check is performed.
6892 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6893 on TCP/IP sockets, because this apparently causes some broken clients to
6896 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6897 unchanged) from the Cygwin maintainer.
6899 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6900 was supported instead of testing for mbx. Effectively a typo.
6902 15. The spa authenticator server code was not checking that the input it
6903 received was valid base64.
6905 16. The debug output line for the "set" modifier in ACLs was not showing the
6906 name of the variable that was being set.
6908 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6910 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6911 lookup on its own. Something else was needed to trigger the lookup. For
6912 example, a match in host_lookup or the need for a host name in a host list.
6913 Now, if $sender_host_name is referenced and the host name has not yet been
6914 looked up, a lookup is performed. If the lookup fails, the variable remains
6915 empty, and $host_lookup_failed is set to "1".
6917 19. Added "eqi" as a case-independent comparison operator.
6919 20. The saslauthd authentication condition could segfault if neither service
6920 nor realm was specified.
6922 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6923 error message that was logged was misleading, and incoming SMTP
6924 connections were dropped. The message is now more accurate, and temporary
6925 errors are given to SMTP connections.
6927 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6928 (except RSET) with a 421 error, until QUIT is received. However, it was
6929 failing to send a response to QUIT.
6931 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6932 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6933 ACL is now run after the helo_try_verify_hosts code.
6935 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6936 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6937 case-independent, so other case variants are also recognized). Apparently
6938 some systems use these upper case variants.
6940 25. If more than two messages were waiting for the same host, and a transport
6941 filter was specified for the transport, Exim sent two messages over the
6942 same TCP/IP connection, and then failed with "socket operation on non-
6943 socket" when it tried to send the third.
6945 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6947 27. The extern definition of crypt16() in expand.c was not being excluded when
6948 the OS had its own crypt16() function.
6950 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6951 as a preferred synonym for return_size_limit, both as an option and as an
6954 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6956 30. Changed the default configuration ACL to relax the local part checking rule
6957 for addresses that are not in any local domains. For these addresses,
6958 slashes and pipe symbols are allowed within local parts, but the sequence
6959 /../ is explicitly forbidden.
6961 31. SPA server authentication was not clearing the challenge buffer before
6964 32. log_message in a "warn" ACL statement was writing to the reject log as
6965 well as to the main log, which contradicts the documentation and doesn't
6966 seem right (because no rejection is happening). So I have stopped it.
6968 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6969 However, I am unable to do any testing of this.
6971 34. Fixed an infelicity in the appendfile transport. When checking directories
6972 for a mailbox, to see if any needed to be created, it was accidentally
6973 using path names with one or more superfluous leading slashes; tracing
6974 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6976 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6977 contents are added to the log line that is written for every discarded
6978 recipient. (Previously a log_message setting was ignored.)
6980 36. The ${quote: operator now quotes the string if it is empty.
6982 37. The install script runs exim in order to find its version number. If for
6983 some reason other than non-existence or emptiness, which it checks, it
6984 could not run './exim', it was installing it with an empty version number,
6985 i.e. as "exim-". This error state is now caught, and the installation is
6988 38. An argument was missing from the function that creates an error message
6989 when Exim fails to connect to the socket for saslauthd authentication.
6990 This could cause Exim to crash, or give a corrupted message.
6992 39. Added isip, isip4, and isip6 to ${if conditions.
6994 40. The ACL variables $acl_xx are now saved with the message, and can be
6995 accessed later in routers, transports, and filters.
6997 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6998 strings in the file are not string-expanded.
7000 42. If a MAIL command specified a SIZE value that was too large to fit into an
7001 int variable, the check against message_size_limit failed. Such values are
7002 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7003 day this will have to be increased, but I don't think I want to be around
7004 when emails are that large.
7011 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7012 iconv() is not standard in FreeBSD.
7014 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7015 IPv6 enabled. The observed symptom was a segmentation fault on return from
7016 the function os_common_find_running_interfaces() in src/os.c.
7018 3. In the check_special_case() function in daemon.c I had used "errno" as an
7019 argument name, which causes warnings on some systems. This was basically a
7020 typo, since it was named "eno" in the comments!
7022 4. The code that waits for the clock to tick (at a resolution of some fraction
7023 of a second) so as to ensure message-id uniqueness was always waiting for
7024 at least one whole tick, when it could have waited for less. [This is
7025 almost certainly not relevant at current processor speeds, where it is
7026 unlikely to ever wait at all. But we try to future-proof.]
7028 5. The function that sleeps for a time interval that includes fractions of a
7029 second contained a race. It did not block SIGALRM between setting the
7030 timer, and suspending (a couple of lines later). If the interval was short
7031 and the sigsuspend() was delayed until after it had expired, the suspension
7032 never ended. On busy systems this could lead to processes getting stuck for
7035 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7036 process, before it forks any delivery processes. The open lookup caching
7037 mechanism meant that the open file or database connection was passed into
7038 the delivery process. The problem was that delivery processes always tidy
7039 up cached lookup data. This could cause a problem for the next delivery
7040 process started by the queue runner, because the external queue runner
7041 process does not know about the closure. So the next delivery process
7042 still has data in the lookup cache. In the case of a file lookup, there was
7043 no problem because closing a file descriptor in a subprocess doesn't affect
7044 the parent. However, if the lookup was caching a connection to a database,
7045 the connection was closed, and the second delivery process was likely to
7046 see errors such as "PGSQL: query failed: server closed the connection
7047 unexpectedly". The problem has been fixed by closing all cached lookups
7048 in a queue runner before running a delivery process.
7050 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7051 seem to have the "const" qualifier which it has on other OS. I've
7054 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7055 *of the same type* (client or server) with the same public name that an
7056 error should be diagnosed.
7058 9. When Exim looked up a host name for an IP address, but failed to find the
7059 original IP address when looking up the host name (a safety check), it
7060 output the message "<ip address> does not match any IP for NULL", which was
7061 confusing, to say the least. The bug was that the host name should have
7062 appeared instead of "NULL".
7064 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7065 user that is built into the binary, and the -C or -D options is used, root
7066 privilege is dropped before the configuration file is read. In addition,
7067 logging is switched to stderr instead of the normal log files. If the
7068 configuration then re-defines the Exim user, the unprivileged environment
7069 is probably not what is expected, so Exim logs a panic warning message (but
7072 However, if deliver_drop_privilege is set, the unprivileged state may well
7073 be exactly what is intended, so the warning has been cut out in that case,
7074 and Exim is allowed to try to write to its normal log files.
7080 1. smtp_return_error_details was not giving details for temporary sender
7081 or receiver verification errors.
7083 2. Diagnose a configuration error if two authenticators have the same public
7086 3. Exim used not to create the message log file for a message until the first
7087 delivery attempt. This could be confusing when incoming messages were held
7088 for policy or load reasons. The message log file is now created at the time
7089 the message is received, and an initial "Received" line is written to it.
7091 4. The automatically generated man page for command line options had a minor
7092 bug that caused no ill effects; however, a more serious problem was that
7093 the procedure for building the man page automatically didn't always
7094 operate. Consequently, release 4.20 contains an out-of-date version. This
7095 shouldn't happen again.
7097 5. When building Exim with embedded Perl support, the script that builds the
7098 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7099 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7101 6. The freeze_tell option was not being used for messages that were frozen on
7102 arrival, either by an ACL or by local_scan().
7104 7. Added the smtp_incomplete_transaction log selector.
7106 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7107 was accepting AUTH without a new EHLO.
7109 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7110 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7113 10. Logging of TCP/IP connections (when configured) now happens in the main
7114 daemon process instead of the child process, so that the TCP/IP connection
7115 count is more accurate (but it can never be perfect).
7117 11. The use of "drop" in a nested ACL was not being handled correctly in the
7118 outer ACL. Now, if condition failure induced by the nested "drop" causes
7119 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7120 or "require"), the connection is dropped.
7122 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7123 that yield "discard" can now be used with an "accept" or a "discard" verb,
7124 but an error is generated for any others (because I can't see a useful way
7125 to define what should happen).
7127 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7128 are now processed in the same way as lines in the Exim configuration file.
7129 In particular, continuation lines are supported.
7131 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7133 15. Added -ti meaning -t -i.
7135 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7136 domains, and warn by logging if others are found.
7138 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7139 returned from GIFCONF when Exim is trying to find the list of interfaces on
7140 a host. The code in os.c has been modified to copy each ifreq to an aligned
7141 structure in all cases.
7143 Also, in some cases, the returned ifreq's were being copied to a 'struct
7144 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7145 means the last couple of bytes of an IPv6 address could be chopped if the
7146 ifreq contained only a normal sockaddr (14 bytes storage).
7148 18. Named domain lists were not supported in the hosts_treat_as_local option.
7149 An entry such as +xxxx was not recognized, and was treated as a literal
7152 19. Ensure that header lines added by a DATA ACL are included in the reject log
7153 if the ACL subsequently rejects the message.
7155 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7156 MD5 (which is deprecated).
7158 21. When testing a filter file using -bf, Exim was writing a message when it
7159 took the sender from a "From " line in the message, but it was not doing so
7160 when it took $return_path from a Return-Path: header line. It now does.
7162 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7163 with a valid header line field name (a series of printing characters
7164 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7166 23. Changed "disc" in the source to "disk" to conform to the documentation and
7167 the book and for uniformity.
7169 24. Ignore Sendmail's -Ooption=value command line item.
7171 25. When execve() failed while trying to run a command in a pipe transport,
7172 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7173 could be confused with a return value of 69 from the command itself. This
7174 has been changed to 127, the value the shell returns if it is asked to run
7175 a non-existent command. The wording for the related log line suggests a
7176 non-existent command as the problem.
7178 26. If received_header_text expands to an empty string, do not add a Received:
7179 header line to the message. (Well, it adds a token one on the spool, but
7180 marks it "old" so that it doesn't get used or transmitted.)
7182 27. Installed eximstats 1.28 (addition of -nt option).
7184 28. There was no check for failure on the call to getsockname() in the daemon
7185 code. This can fail if there is a shortage of resources on the system, with
7186 ENOMEM, for example. A temporary error is now given on failure.
7188 29. Contrary to the C standard, it seems that in some environments, the
7189 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7190 program. Exim now does this explicitly; it affects the formatting of
7191 timestamps using strftime().
7193 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7194 complaints. I've now initialized all the variables, to avoid this.
7196 32. Header lines added by a system filter were not being "seen" during
7197 transport-time rewrites.
7199 33. The info_callback() function passed to OpenSSL is set up with type void
7200 (*)(SSL *, int, int), as described somewhere. However, when calling the
7201 function (actually a macro) that sets it up, the type void(*)() is
7202 expected. I've put in a cast to prevent warnings from picky compilers.
7204 34. If a DNS black list lookup found a CNAME record, but there were no A
7205 records associated with the domain it pointed at, Exim crashed.
7207 35. If a DNS black list lookup returned more than one A record, Exim ignored
7208 all but the first. It now scans all returned addresses if a particular IP
7209 value is being sought. In this situation, the contents of the
7210 $dnslist_value variable are a list of all the addresses, separated by a
7213 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7214 to accept a host name and all its aliases if the forward lookup for any of
7215 them yielded the IP address of the incoming connection. Now it accepts only
7216 those names whose forward lookup yields the correct IP address. Any other
7217 names are discarded. This closes a loophole whereby a rogue DNS
7218 administrator could create reverse DNS records to break through a
7219 wildcarded host restriction in an ACL.
7221 37. If a user filter or a system filter that ran in a subprocess used any of
7222 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7223 the wrong values were passed to the pipe command ($thisaddress had the
7224 value of $0, $0 had the value of $1, etc). This bug was introduced by
7225 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7227 38. Improved the line breaking for long SMTP error messages from ACLs.
7228 Previously, if there was no break point between 40 and 75 characters, Exim
7229 left the rest of the message alone. Two changes have been made: (a) I've
7230 reduced the minimum length to 35 characters; (b) if it can't find a break
7231 point between 35 and 75 characters, it looks ahead and uses the first one
7232 that it finds. This may give the occasional overlong line, but at least the
7233 remaining text gets split now.
7235 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7236 file descriptors might be low, and that setting 1000 would always raise it.
7237 It turns out that in some environments, the limit is already over 1000 and
7238 that lowering it causes trouble. So now Exim takes care not to decrease it.
7240 40. When delivering a message, the value of $return_path is set to $sender_
7241 address at the start of routing (routers may change the value). By an
7242 oversight, this default was not being set up when an address was tested by
7243 -bt or -bv, which affected the outcome if any router or filter referred to
7246 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7247 log only when "message" or "log_message" are set. However, if one of the
7248 conditions was an address verification, or a call to a nested ACL, the
7249 messages generated by the underlying test were being passed through. This
7250 no longer happens. The underlying message is available in $acl_verify_
7251 message for both "message" and "log_message" expansions, so it can be
7252 passed through if needed.
7254 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7255 new expansion $bh_ to give the encoded byte string without charset
7256 translation. Translation happens only if iconv() is available; HAVE_ICONV
7257 indicates this at build time. HEADERS_CHARSET gives the charset to
7258 translate to; headers_charset can change it in the configuration, and
7259 "headers charset" can change it in an individual filter file.
7261 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7262 that creates RFC 2047 encoded "words" labels them as that charset instead
7263 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7264 expansion operator; (ii) when Exim creates a From: line for a local
7265 message; (iii) when a header line is rewritten to include a "phrase" part.
7267 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7268 buggy, causing it to skip the first lines of messages whose message ID
7269 ended in 'D'. This would not have bitten before Exim release 4.14, because
7270 message IDs were unlikely to end in 'D' before then. The effect was to have
7271 incorrect size information for certain domains.
7273 45. #include "config.h" was missing at the start of the crypt16.c module. This
7274 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7277 46. If there was a timeout during a "random" callout check, Exim treated it as
7278 a failure of the random address, and carried on sending RSET and the real
7279 address. If the delay was just some slowness somewhere, the response to the
7280 original RCPT would be taken as a response to RSET and so on, causing
7281 mayhem of various kinds.
7283 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7284 when I implemented it. It didn't allow for the fact that some option values
7285 may legitimately be negative (e.g. size_addition), and it didn't even do
7286 the right test for positive values.
7288 48. Domain names in DNS records are case-independent. Exim always looks them up
7289 in lower case. Some resolvers return domain names in exactly the case they
7290 appear in the zone file, that is, they may contain uppercase letters. Not
7291 all resolvers do this - some return always lower case. Exim was treating a
7292 change of case by a resolver as a change of domain, similar to a widening
7293 of a domain abbreviation. This triggered its re-routing code and so it was
7294 trying to route what was effectively the same domain again. This normally
7295 caused routing to fail (because the router wouldn't handle the domain
7296 twice). Now Exim checks for this case specially, and just changes the
7297 casing of the domain that it ultimately uses when it transmits the message
7300 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7303 50. If a filter generated a file delivery with a non-absolute name (possible if
7304 no home directory exists for the router), the forbid_file option was not
7307 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7308 the existing equality matching.
7310 52. Exim was using ints instead of ino_t variables in some places where it was
7311 dealing with inode numbers.
7313 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7314 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7315 called TMPDIR, and if it finds it is different, it changes its value.
7317 54. The smtp_printf() function is now made available to local_scan() so
7318 additional output lines can be written before returning. There is also an
7319 smtp_fflush() function to enable the detection of a dropped connection.
7320 The variables smtp_input and smtp_batched_input are exported to
7323 55. Changed the default runtime configuration: the message "Unknown user"
7324 has been removed from the ACL, and instead placed on the localuser router,
7325 using the cannot_route_message feature. This means that any verification
7326 failures that generate their own messages won't get overridden. Similarly,
7327 the "Unrouteable address" message that was in the ACL for unverifiable
7328 relay addresses has also been removed.
7330 56. Added hosts_avoid_esmtp to the smtp transport.
7332 57. The exicyclog script was not checking for the esoteric option
7333 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7334 will work only if exicyclog is run under the appropriate euid.
7336 58. Following a discussion on the list, the rules by which Exim recognises line
7337 endings on incoming messages have been changed. The -dropcr and drop_cr
7338 options are now no-ops, retained only for backwards compatibility. The
7339 following line terminators are recognized: LF CRLF CR. However, special
7340 processing applies to CR:
7342 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7343 nor a local message in the state where . is a terminator.
7345 (ii) If a bare CR is encountered in a header line, an extra space is added
7346 after the line terminator so as not to end the header. The reasoning
7347 behind this is that bare CRs in header lines are most likely either
7348 to be mistakes, or people trying to play silly games.
7350 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7351 was being incorrectly given as 18 bytes larger than it should have been.
7352 This is a VOB (very old bug).
7354 60. This may never have affected anything current, but just in case it has:
7355 When the local host is found other than at the start of a list of hosts,
7356 the local host, those with the same MX, and any that follow, are discarded.
7357 When the list in question was part of a longer list of hosts, the following
7358 hosts (not currently being processed) were also being discarded. This no
7359 longer happens. I'm not sure if this situation could ever has previously
7362 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7365 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7366 header. This is something that is recommended in a new Internet Draft, and
7367 is something that is documented as being done by Sendmail. There are two
7368 possible values. For messages generated by the autoreply transport, Exim
7371 Auto-Submitted: auto-replied
7373 whereas for all other generated messages (e.g. bounces) it adds
7375 Auto-Submitted: auto-generated
7377 63. The "personal" condition in filters now includes a test for the
7378 Auto-Submitted: header. If it contains the string "auto-" the message it
7379 not considered personal.
7381 64. Added rcpt_include_affixes as a generic transport option.
7383 65. Added queue_only_override (default true).
7385 66. Added the syslog_duplication option.
7387 67. If what should have been the first header line of a message consisted of
7388 a space followed by a colon, Exim was mis-interpreting it as a header line.
7389 It isn't of course - it is syntactically invalid and should therefore be
7390 treated as the start of the message body. The misbehaviour could have
7391 caused a number of strange effects, including loss of data in subsequent
7392 header lines, and spool format errors.
7394 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7395 client host had authenticated. This control can now be exercised by an ACL
7396 for more flexibility.
7398 69. By default, callouts do not happen when testing with -bh. There is now a
7399 variant, -bhc, which does actually run the callout code, including
7400 consulting and updating the callout cache.
7402 70. Added support for saslauthd authentication, courtesy of Alexander
7405 71. If statvfs() failed on the spool or log directories while checking their
7406 size for availability, Exim confusingly gave the error "space shortage".
7407 Furthermore, in debugging mode it crashed with a floating point exception.
7408 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7409 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7410 serious problem, Exim now writes to the main and panic logs when this
7411 happens, with details of the failure. It then refuses to accept the
7412 incoming message, giving the message "spool directory problem" or "log
7413 directory problem" with a 421 code for SMTP messages.
7415 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7416 0, 1, and 2 exist, because some OS complain for execs without them (see
7417 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7418 descriptors. However, the code omitted to check that the open succeeded,
7419 causing mysterious errors if for some reason the permissions on /dev/null
7420 got screwed. Now Exim writes a message to the main and panic logs, and
7421 bombs out if it can't open /dev/null.
7423 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7424 interact so that it is all more flexible. It is supposed to remain
7425 backwards compatible. Also added extra_local_interfaces.
7427 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7428 to bomb out with an assertion failure - to the client this appears as a
7429 connection drop. This problem occurs in the part of the code that was taken
7430 from the Samba project. Fortunately, the assertion is in a very simple
7431 function, so I have fixed this by reproducing the function inline in the
7432 one place where it is called, and arranging for authentication to fail
7433 instead of killing the process with assert().
7435 75. The SPA client code was not working when the server requested OEM rather
7436 than Unicode encoding.
7438 76. Added code to make require_files with a specific uid setting more usable in
7439 the case where statting the file as root fails - usually a non-root-mounted
7440 NFS file system. When this happens and the failure is EACCES, Exim now
7441 forks a subprocess and does the per-uid checking as the relevant uid.
7443 77. Added process_log_path.
7445 78. If log_file_path was not explicitly set, a setting of check_log_space or
7446 check_log_inodes was ignored.
7448 79. If a space check for the spool or log partitions fails, the incident is now
7449 logged. Of course, in the latter case the data may get lost...
7451 80. Added the %p formatting code to string_format() so that it can be used to
7452 print addresses in debug_print(). Adjusted all the address printing in the
7453 debugging in store.c to use %p rather than %d.
7455 81. There was a concern that a line of code in smtp_in.c could overflow a
7456 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7457 initially expressed, the concern was not well-founded, because trailing
7458 spaces are removed early. However, if the trailing spaces were followed by
7459 a NULL, they did not get removed, so the overflow was possible. Two fixes
7462 (a) I re-wrote the offending code in a cleaner fashion.
7463 (b) If an incoming SMTP command contains a NULL character, it is rejected
7466 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7467 runs initgroups(), so that if the Exim user is in any additional groups,
7468 they will be used during message reception.
7474 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob