1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
17 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
18 buffer overrun for (non-chunking) other transports.
20 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
21 TLS1.3, means that a server rejecting a client certificate is not visible
22 to the client until the first read of encrypted data (typically the
23 response to EHLO). Add detection for that case and treat it as a failed
24 TLS connection attempt, so that the normal retry-in-clear can work (if
27 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
28 and/or domain. Found and fixed by Jason Betts.
30 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
31 configuration). If a CNAME target was not a wellformed name pattern, a
34 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
35 the OS reports them interleaved with other addresses.
37 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
38 used both for input and for a verify callout, both encrypted, SMTP
39 responses being sent by the server could be lost. This resulted in
40 dropped connections and sometimes bounces generated by a peer sending
43 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
44 string. Previously it was possible to cause undefined behaviour in a
45 library routine (usually a crash). Found by "zerons".
47 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
50 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
51 API was removed, so update to use the newer ones.
54 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
55 to changes apparently associated with TLS1.3 handling some of the APIs
56 previously used were either nonfunctional or inappropriate. Strings
57 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
58 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
59 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
60 This affects log line X= elements, the $tls_{in,out}_cipher variables,
61 and the use of specific cipher names in the encrypted= ACL condition.
63 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
64 verification result was not updated unless hosts_require_ocsp applied.
66 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
67 queue_list_requires_admin set to false, non-admin users were denied the
70 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
71 directory-of-certs mode. Previously they were advertised despite the
74 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
75 success-DSN messages. Previously the From: header was always the default
76 one for these; the option was ignored.
78 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
80 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
81 delivery address, which leaked information of the results of local
82 forwarding. Change to the original envelope recipient address, per
85 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
86 requested. Previously not bounce was generated and a log entry of
87 error ignored was made.
93 JH/01 Remove code calling the customisable local_scan function, unless a new
94 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
96 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
97 non-signal-safe functions being used.
99 JH/03 Bug 2269: When presented with a received message having a stupidly large
100 number of DKIM-Signature headers, disable DKIM verification to avoid
101 a resource-consumption attack. The limit is set at twenty.
103 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
104 report of oldest_pass in ${authres } in consequence, and separate out
105 some descriptions of reasons for verification fail.
107 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
108 files in the spool were present and unlocked. A queue-runner could spot
109 them, resulting in a duplicate delivery. Fix that by doing the unlock
110 after the unlink. Investigation by Tim Stewart. Take the opportunity to
111 add more error-checking on spoolfile handling while that code is being
114 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
115 No known attacks, no CVE, this is defensive hardening.
117 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
118 a queue-runner could start a delivery while other operations were ongoing.
119 Cutthrough delivery was a common victim, resulting in duplicate delivery.
120 Found and investigated by Tim Stewart. Fix by using the open message data
121 file handle rather than opening another, and not locally closing it (which
122 releases a lock) for that case, while creating the temporary .eml format
123 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
125 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
126 $sender_verify_failure/$recipient_verify_failure to "random".
128 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
131 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
132 Previously this would segfault.
134 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
137 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
138 like zero, since the resolver should be doing this for us, But we need one
139 as a CNAME but no MX presence gets the CNAME returned; we need to check
140 that doesn't point to an MX to declare it "no MX returned" rather than
141 "error, loop". A new main option is added so the older capability of
142 following some limited number of chain links is maintained.
144 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
146 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
147 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
148 now-deprecated earlier definitions used only specified the range up to TLS
149 1.2 (in the older-version library docs).
151 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
153 JH/15 Rework TLS client-side context management. Stop using a global, and
154 explicitly pass a context around. This enables future use of TLS for
155 connections to service-daemons (eg. malware scanning) while a client smtp
156 connection is using TLS; with cutthrough connections this is quite likely.
158 JH/16 Fix ARC verification to do AS checks in reverse order.
160 JH/17 Support a "tls" option on the ${readsocket } expansion item.
162 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
163 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
164 Previously the "utf8" would be re-prepended for every additional message.
166 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
167 Previously thery were accepted, resulting in issues when attempting to
168 forward messages to a non-supporting MTA.
170 PP/02 Let -n work with printing macros too, not just options.
172 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
173 one parent address was copied, and bogus data was used at delivery-logging
174 time. Either a crash (after delivery) or bogus log data could result.
175 Discovery and analysis by Tim Stewart.
177 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
178 Previously if the string ended mid-character, we did not insert the
179 promised '?' replacement.
181 PP/04 Documentation: current string operators work on bytes, not codepoints.
183 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
184 should pack well giving a smaller memory footprint so better caching and
185 therefore performance. Group the declarations where this can't be done so
186 that the byte-sized flag variables are not interspersed among pointer
187 variables, giving a better chance of good packing by the compiler.
189 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
190 non-null, to avoid issues with sites running BATV. Previously reports were
191 sent with an empty envelope sender so looked like bounces.
193 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
194 The ignore_error flag wasn't being returned from the filter subprocess so
195 was not set for later routers. Investigation and fix by Matthias Kurz.
197 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
198 and a msg:complete for the whole, when a message is manually removed using
199 -Mrm. Developement by Matthias Kurz, hacked on by JH.
201 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
202 a "Gnu special" function, asprintf() in the DB utility binary builds; I
203 hope that is portable enough.
205 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
206 requiring a known-CA anchor certificate; make it now rely entirely on the
207 TLSA as an anchor. Checking the name on the leaf cert against the name
208 on the A-record for the host is still done for TA (but not for EE mode).
210 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
211 included in delivery lines for non-proxied connections, when compiled with
212 SUPPORT_SOCKS and running with proxy logging enabled.
214 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
215 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
216 move the existing event to fire before the normal logging of message
217 failure so that custom logging is bracketed by normal logging.
219 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
220 msg:fail:internal event. Developement by Matthias Kurz.
222 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
223 far too small for todays use of crypto signatures stored there. Go all
224 the way to the max DNS message size of 64kB, even though this might be
225 overmuch for IOT constrained device use.
227 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
228 copy a string over itself. The library routine is documented as not
229 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
231 JH/32 For main options check_spool_space and check_inode_space, where the
232 platform supports 64b integers, support more than the previous 2^31 kB
233 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
234 the previous G, M, k.
236 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
237 $authenticated_fail_id variable on authentication failure. Previously
240 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
241 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
242 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
243 GNUTLS_SEC_PARAM_MEDIUM.
245 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
246 side. Previously we would continue as if no SNI had been received.
248 JH/36 Harden the handling of string-lists. When a list consisted of a sole
249 "<" character, which should be a list-separator specification, we walked
250 off past the nul-terimation.
252 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
253 causes) even when the retry time is not yet met. Previously they were
254 not, meaning that when (say) an account was over-quota and temp-rejecting,
255 and multiple senders' messages were queued, only one sender would get
256 notified on each configured delay_warning cycle.
258 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
260 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
261 cipher-suites, an error can be left on the stack even for a succeeding
262 accept; this results in impossible error messages when a later operation
265 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
266 return error codes indicating retry. Under TLS1.3 this becomes required.
268 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
269 it only wrote the new authenticators, resulting in a lack of tracking of
270 peer changes of ESMTP extensions until the next cache flush.
272 JH/41 Fix the loop reading a message header line to check for integer overflow,
273 and more-often against header_maxsize. Previously a crafted message could
274 induce a crash of the recive process; now the message is cleanly rejected.
276 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
277 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
283 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
284 When redis_servers is set to a list of > 1 element, and the Redis servers
285 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
286 case of MOVED into a DEFER case instead, thus moving the query onto the
287 next server in the list. For a cluster of N elements, all N servers must
288 be defined in redis_servers.
290 GF/02 Catch and remove uninitialized value warning in exiqsumm
291 Check for existence of @ARGV before looking at $ARGV[0]
293 JH/01 Replace the store_release() internal interface with store_newblock(),
294 which internalises the check required to safely use the old one, plus
295 the allocate and data copy operations duplicated in both (!) of the
296 extant use locations.
298 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
299 modifier. This matches the restriction on the commandline.
301 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
302 Previously only the last row was returned.
304 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
305 we assumed that tags in the header were well-formed, and parsed the
306 element content after inspecting only the first char of the tag.
307 Assumptions at that stage could crash the receive process on malformed
310 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
311 While running the DKIM ACL we operate on the Permanent memory pool so that
312 variables created with "set" persist to the DATA ACL. Also (at any time)
313 DNS lookups that fail create cache records using the Permanent pool. But
314 expansions release any allocations made on the current pool - so a dnsdb
315 lookup expansion done in the DKIM ACL releases the memory used for the
316 DNS negative-cache, and bad things result. Solution is to switch to the
317 Main pool for expansions.
318 While we're in that code, add checks on the DNS cache during store_reset,
319 active in the testsuite.
320 Problem spotted, and debugging aided, by Wolfgang Breyha.
322 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
323 When none of the hosts presented to a transport match an already-open
324 connection, close it and proceed with the list. Previously we would
325 queue the message. Spotted by Lena with Yahoo, probably involving
328 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
329 Previously a spurious "250 OK id=" response was appended to the proper
332 JH/08 The "support for" informational output now, which built with Content
333 Scanning support, has a line for the malware scanner interfaces compiled
334 in. Interface can be individually included or not at build time.
336 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
337 by the template makefile "src/EDITME". The "STREAM" support for an older
338 ClamAV interface method is removed.
340 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
341 rows affected is given instead).
343 JH/11 The runtime Berkeley DB library version is now additionally output by
344 "exim -d -bV". Previously only the compile-time version was shown.
346 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
347 SMTP connection. Previously, when one had more receipients than the
348 first, an abortive onward connection was made. Move to full support for
349 multiple onward connections in sequence, handling cutthrough connection
350 for all multi-message initiating connections.
352 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
353 routers. Previously, a multi-recipient message would fail to match the
354 onward-connection opened for the first recipient, and cause its closure.
356 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
357 a timeout on read on a GnuTLS initiating connection, resulting in the
358 initiating connection being dropped. This mattered most when the callout
359 was marked defer_ok. Fix to keep the two timeout-detection methods
362 JH/15 Relax results from ACL control request to enable cutthrough, in
363 unsupported situations, from error to silently (except under debug)
364 ignoring. This covers use with PRDR, frozen messages, queue-only and
367 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
369 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
370 metadata, resulting in a crash in free().
372 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
373 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
374 Broken also in d185889f4, with init system revamp.
376 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
377 Previously we abruptly closed the connection after reading a malware-
378 found indication; now we go on to read the "scan ok" response line,
381 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
382 ACL. Previously, a crash would result.
384 JH/19 Speed up macro lookups during configuration file read, by skipping non-
385 macro text after a replacement (previously it was only once per line) and
386 by skipping builtin macros when searching for an uppercase lead character.
388 JH/20 DANE support moved from Experimental to mainline. The Makefile control
389 for the build is renamed.
391 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
392 was allocated for every new TLS startup, meaning one per message. Fix
393 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
395 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
396 reported the original. Fix to report (as far as possible) the ACL
397 result replacing the original.
399 JH/23 Fix memory leak during multi-message connections using STARTTLS under
400 OpenSSL. Certificate information is loaded for every new TLS startup,
401 and the resources needed to be freed.
403 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
405 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
408 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
409 DATA response info to the (existing) per-recipient response info for
410 the "C=" log element. It can have useful tracking info from the
411 destination system. Patch from Simon Arlott.
413 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
414 length value. Previously this would segfault.
416 HS/02 Support Avast multiline protoocol, this allows passing flags to
417 newer versions of the scanner.
419 JH/28 Ensure that variables possibly set during message acceptance are marked
420 dead before release of memory in the daemon loop. This stops complaints
421 about them when the debug_store option is enabled. Discovered specifically
422 for sender_rate_period, but applies to a whole set of variables.
423 Do the same for the queue-runner and queue-list loops, for variables set
424 from spool message files. Do the same for the SMTP per-message loop, for
425 certain variables indirectly set in ACL operations.
427 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
428 as a multi-recipient message from a mailinglist manager). The coding had
429 an arbitrary cutoff number of characters while checking for more input;
430 enforced by writing a NUL into the buffer. This corrupted long / fast
431 input. The problem was exposed more widely when more pipelineing of SMTP
432 responses was introduced, and one Exim system was feeding another.
433 The symptom is log complaints of SMTP syntax error (NUL chars) on the
434 receiving system, and refused recipients seen by the sending system
435 (propating to people being dropped from mailing lists).
436 Discovered and pinpointed by David Carter.
438 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
439 replaced by the ${authresults } expansion.
441 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
443 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
444 allows proper process termination in container environments.
446 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
447 Previously the "final dot" had a newline after it; ensure it is CR,LF.
449 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
450 and "err_perm", deprecated since 4.83 when the RFC-defined words
451 "temperror" and "permerror" were introduced.
453 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
454 transport-filters or DKIM-signing. The restriction was lost in the
455 consolidation of verify-callout and delivery SMTP handling.
456 Extend the restriction to also cover ARC-signing.
458 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
459 in defer=pass mode supply a 450 to the initiator. Previously the message
462 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
463 tls_require_ciphers is used as before.
465 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
466 "pass_unscanned". Only tmpfails from the scanner are written to
467 the paniclog, as they may require admin intervention (permission
468 denied, license issues). Other scanner errors (like decompression
469 bombs) do not cause a paniclog entry.
471 JH/36 Fix reinitialisation of DKIM logging variable between messages.
472 Previously it was possible to log spurious information in receive log
475 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
476 triggered odd behaviour from Outlook Express clients.
478 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
481 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
482 since the IETF WG has not yet settled on that versus the original
483 "bare" representation.
485 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
486 Previously the millisecond value corrupted the output.
487 Fix also for syslog_pid=no and log_selector +pid, for which the pid
488 corrupted the output.
494 JH/01 Rework error string handling in TLS interface so that the caller in
495 more cases is responsible for logging. This permits library-sourced
496 string to be attached to addresses during delivery, and collapses
497 pairs of long lines into single ones.
499 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
500 during configuration. Wildcards are allowed and expanded.
502 JH/02 Rework error string handling in DKIM to pass more info back to callers.
503 This permits better logging.
505 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
506 do not close it down and have the child transport start it up again on
507 the passed-on TCP connection. Instead, proxy the child (and any
508 subsequent ones) for TLS via a unix-domain socket channel. Logging is
509 affected: the continued delivery log lines do not have any DNSSEC, TLS
510 Certificate or OCSP information. TLS cipher information is still logged.
512 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
513 identical IP addresses on different listening ports. Will also affect
516 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
517 add noisy ifdef guards to special-case this sillyness.
518 Patch from Bernd Kuhls.
520 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
521 than 255 are no longer allowed.
523 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
524 Disable the session-cache too, which might reduce our load. Since we
525 currrectly use a new context for every connection, both as server and
526 client, there is no benefit for these.
527 GnuTLS appears to not support tickets server-side by default (we don't
528 call gnutls_session_ticket_enable_server()) but client side is enabled
529 by default on recent versions (3.1.3 +) unless the PFS priority string
532 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
533 <https://reproducible-builds.org/specs/source-date-epoch/>.
535 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
536 the check for any unsuccessful recipients did not notice the limit, and
537 erroneously found still-pending ones.
539 JH/08 Pipeline CHUNKING command and data together, on kernels that support
540 MSG_MORE. Only in-clear (not on TLS connections).
542 JH/09 Avoid using a temporary file during transport using dkim. Unless a
543 transport-filter is involved we can buffer the headers in memory for
544 creating the signature, and read the spool data file once for the
545 signature and again for transmission.
547 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
548 4.77 as the kernel support then wasn't solid, having issues in 64bit
549 mode. Now, it's been long enough. Add support for FreeBSD also.
551 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
552 case where the routing stage had gathered several addresses to send to
553 a host before calling the transport for the first, we previously failed
554 to close down TLS in the old transport process before passing the TCP
555 connection to the new process. The new one sent a STARTTLS command
556 which naturally failed, giving a failed delivery and bloating the retry
557 database. Investigation and fix prototype from Wolfgang Breyha.
559 JH/12 Fix check on SMTP command input synchronisation. Previously there were
560 false-negatives in the check that the sender had not preempted a response
561 or prompt from Exim (running as a server), due to that code's lack of
562 awareness of the SMTP input buffering.
564 PP/04 Add commandline_checks_require_admin option.
565 Exim drops privileges sanely, various checks such as -be aren't a
566 security problem, as long as you trust local users with access to their
567 own account. When invoked by services which pass untrusted data to
568 Exim, this might be an issue. Set this option in main configuration
569 AND make fixes to the calling application, such as using `--` to stop
572 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
573 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
574 responses to those, into a single TLS record each way (this usually means
575 a single packet). As a side issue, smtp_enforce_sync now works on TLS
578 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
579 affects you only if you're dancing at the edge of the param size limits.
580 If you are, and this message makes sense to you, then: raise the
581 configured limit or use OpenSSL 1.1. Nothing we can do for older
584 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
585 cmdline element to get the documented default one. Previously it was
588 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
589 are unsuable for non-message-specific reasons - eg. connection timeout,
590 banner-time rejection.
592 JH/16 Fix logging of delivery remote port, when specified by router, under
595 PP/06 Repair manualroute's ability to take options in any order, even if one
596 is the name of a transport.
599 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
601 JH/17 Change the list-building routines interface to use the expanding-string
602 triplet model, for better allocation and copying behaviour.
604 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
605 Previously it was constructed the first time a possibly-matching string
606 was met in the configuration file input during startup; now it is done
609 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
610 compatible one, to avoid the (poorly documented) possibility of a config
611 file in the working directory redirecting the DB files, possibly correpting
612 some existing file. CVE-2017-10140 assigned for BDB.
614 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
615 cache-hot. Previously, although the result was properly cached, the
616 initial verify call returned a defer.
618 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
619 the main verify for receipient in uncached-mode.
621 JH/22 Retire historical build files to an "unsupported" subdir. These are
622 defined as "ones for which we have no current evidence of testing".
624 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
625 if present. Previously it was ignored.
627 JH/24 Start using specified-initialisers in C structure init coding. This is
628 a C99 feature (it's 2017, so now considered safe).
630 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
631 if was a fixed-sized field and bitmask ops via macros; it is now more
634 PP/07 GitHub PR 56: Apply MariaDB build fix.
635 Patch provided by Jaroslav Å karvada.
637 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
638 during Coverity cleanups [4.87 JH/47]
639 Diagnosis and fix provided by Michael Fischer v. Mollard.
641 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
642 the right size to place the terminating semicolon on its own folded
643 line, the header hash was calculated to an incorrect value thanks to
644 the (relaxed) space the fold became.
646 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
647 and confused the parent.
649 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
650 which could crash as a result. This could lead to undeliverable messages.
652 JH/28 Logging: "next input sent too soon" now shows where input was truncated
655 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
656 matters on fast-turnover and PID-randomising systems, which were getting
657 out-of-order delivery.
659 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
660 a possibly-overlapping copy. The symptom was that "Remote host closed
661 connection in response to HELO" was logged instead of the actual 4xx
664 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
665 Previously only that bufferd was discarded, resulting in SYMTP command
668 JH/32 DKIM: when a message has multiple signatures matching an identity given
669 in dkim_verify_signers, run the dkim acl once for each. Previously only
670 one run was done. Bug 2189.
672 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
673 "panic the current process" to "deliberately defer". The panic log is
674 still written with the problem list name; the mail and reject logs now
675 get a temp-reject line for the message that was being handled, saying
676 something like "domains check lookup or other defer". The SMTP 451
677 message is still "Temporary local problem".
679 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
680 A crafted sequence of BDAT commands could result in in-use memory beeing
681 freed. CVE-2017-16943.
683 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
684 from SMTP input. Previously it was always done; now only done for DATA
685 and not BDAT commands. CVE-2017-16944.
687 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
688 to the message (such as an overlong header line). Previously this was
689 not done and we did not exit BDAT mode. Followon from the previous item
690 though a different problem.
696 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
697 than -2003 did; needs libidn2 in addition to libidn.
699 JH/02 The path option on a pipe transport is now expanded before use.
701 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
702 Patch provided by "Björn", documentation fix added too.
704 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
705 missing a wire-to-host endian conversion.
707 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
708 close after a BDAT command line could be taken as a following command,
709 giving a synch failure. Fix by only checking for synch immediately
710 before acknowledging the chunk.
712 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
713 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
714 macro. Patches provided by Josh Soref.
716 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
717 Previously we did not; the RFC seems ambiguous and VRFY is not listed
718 by IANA as a service extension. However, John Klensin suggests that we
721 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
722 the dkim code may be unix-mode line endings rather than smtp wire-format
723 CRLF, so prepend a CR to any bare LF.
725 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
726 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
728 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
729 the first were themselves being wrongly included in the feed into dkim
730 processing; with most chunk sizes in use this resulted in an incorrect
731 body hash calculated value.
733 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
734 DKIM signature block, for verification. Although advised against by
735 standards it is specifically not ruled illegal.
737 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
739 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
740 missing a body hash (the bh= tag).
742 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
743 It seems that HAProxy sends the Proxy Protocol information in clear and
744 only then does a TLS startup, so do the same.
746 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
747 TCP connections (such as for Spamd) unless the daemon successfully set
748 Fast Open mode on its listening sockets. This fixes breakage seen on
749 too-old kernels or those not configured for Fast Open, at the cost of
750 requiring both directions being enabled for TFO, and TFO never being used
751 by non-daemon-related Exim processes.
753 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
754 endings, at least on the first header line. Try to canonify any that get
755 past that check, despite the cost.
757 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
758 now limited to an arbitrary five deep, while parsing addresses with the
759 strip_excess_angle_brackets option enabled.
761 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
762 instead leave the unprompted TLS handshake in socket buffer for the
763 TLS library to consume.
765 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
767 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
769 JH/16 Drop variables when they go out of scope. Memory management drops a whole
770 region in one operation, for speed, and this leaves assigned pointers
771 dangling. Add checks run only under the testsuite which checks all
772 variables at a store-reset and panics on a dangling pointer; add code
773 explicitly nulling out all the variables discovered. Fixes one known
774 bug: a transport crash, where a dangling pointer for $sending_ip_address
775 originally assigned in a verify callout, is re-used.
777 PP/06 Drop '.' from @INC in various Perl scripts.
779 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
781 PP/08 Reduce a number of compilation warnings under clang; building with
782 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
783 should be warning-free.
785 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
787 HS/01 Fix portability problems introduced by PP/08 for platforms where
788 realloc(NULL) is not equivalent to malloc() [SunOS et al].
790 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
791 chunk. This allows us to accept broken chunked messages. We need a more
792 general solution here.
794 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
795 already-broken messages in the queue.
797 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
799 JH/19 Fix reference counting bug in routing-generated-address tracking.
805 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
806 supports it and a size is available (ie. the sending peer gave us one).
808 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
809 years of being deprecated). The replacements are the ACLs
810 acl_smtp_mime and acl_not_smtp_mime.
812 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
813 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
814 or even an in-clear connection were permitted. Now, if the host lookup
815 was dnssec and dane was requested then the host is only used if the
816 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
817 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
818 if one fails this test.
819 This means that a poorly-configured remote DNS will make it incommunicado;
820 but it protects against a DNS-interception attack on it.
822 JH/04 Bug 1810: make continued-use of an open smtp transport connection
823 non-noisy when a race steals the message being considered.
825 JH/05 If main configuration option tls_certificate is unset, generate a
826 self-signed certificate for inbound TLS connections.
828 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
829 in rewrites and routers.
831 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
832 and logged a warning sing 4.83; now they are a configuration file error.
834 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
835 (lacking @domain). Apply the same qualification processing as RCPT.
837 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
839 JH/10 Support ${sha256:} applied to a string (as well as the previous
842 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
843 a cutthrough deliver is pending, as we always want to make a connection.
844 This also avoids re-routing the message when later placing the cutthrough
845 connection after a verify cache hit.
846 Do not update it with the verify result either.
848 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
849 when routing results in more than one destination address.
851 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
852 signing (which inhibits the cutthrough capability). Previously only
853 the presence of an option was tested; now an expansion evaluating as
854 empty is permissible (obviously it should depend only on data available
855 when the cutthrough connection is made).
857 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
858 the relevant preceding SMTP command did not note the pipelining mode.
860 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
861 Previously they were not counted.
863 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
864 as one having no matching records. Previously we deferred the message
865 that needed the lookup.
867 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
868 distinguished as "(=".
870 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
871 for missing MX records. Previously it only worked for missing A records.
873 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
875 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
876 after the data-go-ahead and data-ack. Patch from Jason Betts.
878 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
879 even for a "none" policy. Patch from Tony Meyer.
881 JH/22 Fix continued use of a connection for further deliveries. If a port was
882 specified by a router, it must also match for the delivery to be
885 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
886 When one of the recipients of a message was unsuitable for the connection
887 (has no matching addresses), we lost track of needing to mark it
888 deferred. As a result mail would be lost.
890 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
892 JH/25 Decoding ACL controls is now done using a binary search; the source code
893 takes up less space and should be simpler to maintain. Merge the ACL
894 condition decode tables also, with similar effect.
896 JH/26 Fix problem with one_time used on a redirect router which returned the
897 parent address unchanged. A retry would see the parent address marked as
898 delivered, so not attempt the (identical) child. As a result mail would
901 JH/27 Fix a possible security hole, wherein a process operating with the Exim
902 UID can gain a root shell. Credit to http://www.halfdog.net/ for
903 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
906 JH/28 Enable {spool,log} filesystem space and inode checks as default.
907 Main config options check_{log,spool}_{inodes,space} are now
908 100 inodes, 10MB unless set otherwise in the configuration.
910 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
911 Previously it only applied to the main-section connection policy
914 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
916 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
917 by me. Added RFC7919 DH primes as an alternative.
919 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
920 are not in the system include path.
922 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
923 GnuTLS, when a session startup failed (eg because the client disconnected)
924 Exim did stdio operations after fclose. This was exposed by a recent
925 change which nulled out the file handle after the fclose.
927 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
928 signed directly by the cert-signing cert, rather than an intermediate
929 OCSP-signing cert. This is the model used by LetsEncrypt.
931 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
933 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
934 an incoming connection.
936 HS/02 Bug 1802: Do not half-close the connection after sending a request
939 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
940 fallback to "prime256v1".
942 JH/34 SECURITY: Use proper copy of DATA command in error message.
943 Could leak key material. Remotely exploitable. CVE-2016-9963.
949 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
950 and 3.4.4 - once the server is enabled to respond to an OCSP request
951 it does even when not requested, resulting in a stapling non-aware
952 client dropping the TLS connection.
954 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
955 support variable-length bit vectors. No functional change.
957 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
958 The I= interface field on outgoing lines is now after the H= remote
959 host field, same as incoming lines. There is a separate
960 outgoing_interface log selector which allows you to disable the
963 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
964 If not running log_selector +smtp_connection the mainlog would be held
965 open indefinitely after a "too many connections" event, including to a
966 deleted file after a log rotate. Leave the per net connection logging
967 leaving it open for efficiency as that will be quickly detected by the
968 check on the next write.
970 HS/01 Bug 1671: Fix post transport crash.
971 Processing the wait-<transport> messages could crash the delivery
972 process if the message IDs didn't exist for some reason. When
973 using 'split_spool_directory=yes' the construction of the spool
974 file name failed already, exposing the same netto behaviour.
976 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
977 mime_regex ACL conditions.
979 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
980 to DSN fail messages (bounces): remote IP, remote greeting, remote response
981 to HELO, local diagnostic string.
983 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
984 log line to debug. Even when configured with a tls authenticator many
985 client connections are expected to not authenticate in this way, so
986 an authenticate fail is not an error.
988 HS/02 Add the Exim version string to the process info. This way exiwhat
989 gives some more detail about the running daemon.
991 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
992 matter for fast-change records such as DNSBLs.
994 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
995 retry record, even if constant. There may be multiple transports with
996 different interface settings and the retry behaviour needs to be kept
999 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1001 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1003 JH/10 Bug 840: fix log_defer_output option of pipe transport
1005 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1006 hosts_randomize. This matters a lot when combined with mua_wrapper.
1008 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1009 ${quote_pgsql:<string>} operator.
1011 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1013 JH/14 Change header file name for freeradius-client. Relevant if compiling
1014 with Radius support; from the Gentoo tree and checked under Fedora.
1016 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1018 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1019 option transport_filter, meaning no filtering.
1021 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1023 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1024 defaults to "*" (all hosts). The variable is now available when not built
1025 with TLS, default unset, mainly to enable keeping the testsuite sane.
1026 If a server certificate is not supplied (via tls_certificate) an error is
1027 logged, and clients will find TLS connections fail on startup. Presumably
1028 they will retry in-clear.
1029 Packagers of Exim are strongly encouraged to create a server certificate
1030 at installation time.
1032 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1033 with the $config_file variable.
1035 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1036 in transport context, after the attempt, and per-recipient. The latter type
1037 is per host attempted. The event data is the error message, and the errno
1038 information encodes the lookup type (A vs. MX) used for the (first) host,
1039 and the trailing two digits of the smtp 4xx response.
1041 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1042 to write to mainlog (or rejectlog, paniclog) in the window between file
1043 creation and permissions/ownership being changed. Particularly affects
1044 installations where exicyclog is run as root, rather than exim user;
1045 result is that the running daemon panics and dies.
1047 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1049 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1050 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1051 "pri" and "weight". Note that the previous implicit priority given by the
1052 list order is no longer honoured.
1054 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1055 for DKIM processing.
1057 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1058 by defining SUPPORT_SOCKS.
1060 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1061 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1062 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1063 variables are renamed to proxy_{local,external}_{address,port}.
1065 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1066 for a build by defining SUPPORT_I18N
1068 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1069 of the query string, and make ${quote_redis:} do that quoting.
1071 JH/29 Move Events support from Experimental to mainline, enabled by default
1072 and removable for a build by defining DISABLE_EVENT.
1074 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1076 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1077 cached by the daemon.
1079 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1080 by defining LOOKUP_REDIS. The libhiredis library is required.
1082 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1083 keys are given for lookup.
1085 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1086 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1087 only supported when built with TLS support. The PolarSSL SHA routines
1088 are still used when the TLS library is too old for convenient support.
1090 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1091 openssl_options), for security. OpenSSL forces this from version 1.1.0
1092 server-side so match that on older versions.
1094 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1095 allocation for $value could be released as the expansion processing
1096 concluded, but leaving the global pointer active for it.
1098 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1099 and to use the domains and local_parts ACL conditions.
1101 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1102 incorrectly not doubled on cutthrough transmission, hence seen as a
1103 body-termination at the receiving system - resulting in truncated mails.
1104 Commonly the sender saw a TCP-level error, and retransmitted the message
1105 via the normal store-and-forward channel. This could result in duplicates
1106 received - but deduplicating mailstores were liable to retain only the
1107 initial truncated version.
1109 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1111 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1113 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1114 we're in there, support oversigning also; bug 1309.
1116 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1118 HS/04 Add support for keep_environment and add_environment options.
1120 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1121 either intentional arithmetic overflow during PRNG, or testing config-
1124 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1125 delivery resulted in actual delivery. Cancel cutthrough before DATA
1128 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1129 rejects a recipient: pass the reject to the originator.
1131 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1132 Many were false-positives and ignorable, but it's worth fixing the
1135 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1136 for the new environment-manipulation done at startup. Move the routines
1137 from being local to tls.c to being global via the os.c file.
1139 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1140 an extract embedded as result-arg for a map, the first arg for extract
1141 is unavailable so we cannot tell if this is a numbered or keyed
1142 extraction. Accept either.
1148 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1151 JH/02 The smtp transport option "multi_domain" is now expanded.
1153 JH/03 The smtp transport now requests PRDR by default, if the server offers
1156 JH/04 Certificate name checking on server certificates, when exim is a client,
1157 is now done by default. The transport option tls_verify_cert_hostnames
1158 can be used to disable this per-host. The build option
1159 EXPERIMENTAL_CERTNAMES is withdrawn.
1161 JH/05 The value of the tls_verify_certificates smtp transport and main options
1162 default to the word "system" to access the system default CA bundle.
1163 For GnuTLS, only version 3.0.20 or later.
1165 JH/06 Verification of the server certificate for a TLS connection is now tried
1166 (but not required) by default. The verification status is now logged by
1167 default, for both outbound TLS and client-certificate supplying inbound
1170 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1173 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1174 Status Notification (bounce) messages are now MIME format per RFC 3464.
1175 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1176 under the control of the dsn_advertise_hosts option, and routers may
1177 have a dsn_lasthop option.
1179 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1180 default, modifiable by a malware= option. The list separator for
1181 the options can now be changed in the usual way. Bug 68.
1183 JH/10 The smtp_receive_timeout main option is now expanded before use.
1185 JH/11 The incoming_interface log option now also enables logging of the
1186 local interface on delivery outgoing connections.
1188 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1189 if the interface and destination host and port all match.
1191 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1194 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1195 Patch from Andrew Lewis.
1197 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1198 now supports optional time-restrictions, weighting, and priority
1199 modifiers per server. Patch originally by <rommer@active.by>.
1201 JH/16 The spamd_address main option now supports a mixed list of local
1202 and remote servers. Remote servers can be IPv6 addresses, and
1203 specify a port-range.
1205 JH/17 Bug 68: The spamd_address main option now supports an optional
1206 timeout value per server.
1208 JH/18 Bug 1581: Router and transport options headers_add/remove can
1209 now have the list separator specified.
1211 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1214 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1217 JH/21 Support for the A6 type of dns record is withdrawn.
1219 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1220 rather than the verbs used.
1222 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1223 from 255 to 1024 chars.
1225 JH/24 Verification callouts now attempt to use TLS by default.
1227 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1228 are generic router options now. The defaults didn't change.
1230 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1231 Original patch from Alexander Shikoff, worked over by JH.
1233 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1234 files if ZCAT_COMMAND is not executable.
1236 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1238 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1240 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1241 Normally benign, it bites when the pair was led to by a CNAME;
1242 modern usage is to not canonicalize the domain to a CNAME target
1243 (and we were inconsistent anyway for A-only vs AAAA+A).
1245 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1247 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1248 when evaluating $sender_host_dnssec.
1250 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1251 $sender_helo_dnssec variable.
1253 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1255 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1257 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1259 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1260 documented as working, but never had. Support all but $spam_report.
1262 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1263 added for tls authenticator.
1265 HS/03 Add perl_taintmode main config option
1271 TL/01 When running the test suite, the README says that variables such as
1272 no_msglog_check are global and can be placed anywhere in a specific
1273 test's script, however it was observed that placement needed to be near
1274 the beginning for it to behave that way. Changed the runtest perl
1275 script to read through the entire script once to detect and set these
1276 variables, reset to the beginning of the script, and then run through
1277 the script parsing/test process like normal.
1279 TL/02 The BSD's have an arc4random API. One of the functions to induce
1280 adding randomness was arc4random_stir(), but it has been removed in
1281 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1282 function when detected.
1284 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1285 cause callback expansion.
1287 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1288 syntax errors in an expansion can be treated as a string instead of
1289 logging or causing an error, due to the internal use of bool_lax
1290 instead of bool when processing it.
1292 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1293 server certificates when making smtp deliveries.
1295 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1297 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1299 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1301 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1302 Merged patch from Sebastian Wiedenroth.
1304 JH/05 Fix results-pipe from transport process. Several recipients, combined
1305 with certificate use, exposed issues where response data items split
1306 over buffer boundaries were not parsed properly. This eventually
1307 resulted in duplicates being sent. This issue only became common enough
1308 to notice due to the introduction of connection certificate information,
1309 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1311 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1312 size buffer was used, resulting in syntax errors when an expansion
1315 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1316 version 3.3.6 or later.
1318 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1319 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1320 both become "event_action", the variables become $event_name, $event_data
1321 and $event_defer_errno. There is a new variable $verify_mode, usable in
1322 routers, transports and related events. The tls:cert event is now also
1323 raised for inbound connections, if the main configuration event_action
1326 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1327 early OCSP support, but no stapling (appears to be less than 1.0.0).
1329 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1330 server certificate names available under the smtp transport option
1331 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1334 JH/10 Time-related extraction expansions from certificates now use the main
1335 option "timezone" setting for output formatting, and are consistent
1336 between OpenSSL and GnuTLS compilations. Bug 1541.
1338 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1339 encoded parameter in the incoming message. Bug 1558.
1341 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1342 include certificate info, eximon was claiming there were spoolfile
1345 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1347 JH/14 Log delivery-related information more consistently, using the sequence
1348 "H=<name> [<ip>]" wherever possible.
1350 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1351 are problematic for Debian distribution, omit them from the release
1354 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1356 JH/16 Fix string representation of time values on 64bit time_t architectures.
1359 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1360 output list separator was used.
1365 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1366 checkers that were complaining about end of non-void function with no
1369 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1370 This was a regression introduced in 4.83 by another bugfix.
1372 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1374 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1375 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1381 TF/01 Correctly close the server side of TLS when forking for delivery.
1383 When a message was received over SMTP with TLS, Exim failed to clear up
1384 the incoming connection properly after forking off the child process to
1385 deliver the message. In some situations the subsequent outgoing
1386 delivery connection happened to have the same fd number as the incoming
1387 connection previously had. Exim would try to use TLS and fail, logging
1388 a "Bad file descriptor" error.
1390 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1391 utilities have not been installed.
1393 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1394 temporary space as the ACL may create new global variables.
1396 TL/01 LDAP support uses per connection or global context settings, depending
1397 upon the detected version of the libraries at build time.
1399 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1400 to extract and use the src ip:port in logging and expansions as if it
1401 were a direct connection from the outside internet. PPv2 support was
1402 updated based on HAProxy spec change in May 2014.
1404 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1406 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1407 Properly escape header and check for NULL return.
1409 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1412 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1414 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1415 characters in header names, implemented as a verify condition.
1416 Contributed by Michael Fischer v. Mollard.
1418 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1419 results permerror and temperror. Previous values are deprecated but
1420 still accepted. In a future release, err_perm and err_temp will be
1421 completely removed, which will be a backward incompatibility if the
1422 ACL tests for either of these two old results. Patch contributed by
1423 user bes-internal on the mailing list.
1425 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1427 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1428 selectors, in both main and reject logs.
1430 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1433 JH/07 Add malware type "sock" for talking to simple daemon.
1435 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1437 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1438 routers/transports under cutthrough routing.
1440 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1441 numbers. Touch up "bool" conditional to keep the same definition.
1443 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1445 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1447 JH/12 Expand items in router/transport headers_add or headers_remove lists
1448 individually rather than the list as a whole. Bug 1452.
1450 Required for reasonable handling of multiple headers_ options when
1451 they may be empty; requires that headers_remove items with embedded
1452 colons must have them doubled (or the list-separator changed).
1454 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1455 view the policy declared in the DMARC record. Currently, $dmarc_status
1456 is a combined value of both the record presence and the result of the
1459 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1461 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1462 dnslookup router and the smtp transport (applying to the forward
1465 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1466 of ldap servers used for a specific lookup. Patch provided by Heiko
1469 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1470 New variable $lookup_dnssec_authenticated for observability.
1472 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1473 Patch submitted by Lars Timman.
1475 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1477 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1478 Requires trusted mode and valid format message id, aborts otherwise.
1479 Patch contributed by Heiko Schlichting.
1481 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1482 certextract with support for various fields. Bug 1358.
1484 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1485 is requested by default, modifiable by smtp transport option
1488 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1489 operate on certificate variables to give certificate fingerprints
1490 Also new ${sha256:cert_variable}.
1492 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1494 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1495 Christian Aistleitner.
1497 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1499 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1500 file. Patch from Wolfgang Breyha.
1502 JH/25 Expand the coverage of the delivery $host and $host_address to
1503 client authenticators run in verify callout. Bug 1476.
1505 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1506 align with daemon_smtp_ports. Bug 72.
1508 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1509 support and error reporting did not work properly.
1511 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1512 and is readable. Patch from Andrew Colin Kissa.
1514 TL/14 Enhance documentation of ${run expansion and how it parses the
1515 commandline after expansion, particularly in the case when an
1516 unquoted variable expansion results in an empty value.
1518 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1520 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1521 by renaming away from it. Addresses GH issue 15, reported by
1524 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1526 TL/15 SECURITY: prevent double expansion in math comparison functions
1527 (can expand unsanitized data). Not remotely exploitable.
1534 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1536 PP/02 Make -n do something, by making it not do something.
1537 When combined with -bP, the name of an option is not output.
1539 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1542 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1543 $sender_host_name and config options to manage this, and basic check
1546 PP/05 DSCP support for outbound connections and control modifier for inbound.
1548 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1549 (Only plugin which currently uses this is kerberos4, which nobody should
1550 be using, but we should make it available and other future plugins might
1551 conceivably use it, even though it would break NAT; stuff *should* be
1552 using channel bindings instead).
1554 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1555 name; added for Sendmail compatibility; requires admin caller.
1556 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1557 just ignore it); requires trusted caller.
1558 Also parse but ignore: -Ac -Am -X<logfile>
1561 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1563 TL/02 Add +smtp_confirmation as a default logging option.
1565 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1566 Patch by Magnus Holmgren from 2007-02-20.
1568 TL/04 Bugzilla 1281 - Spec typo.
1569 Bugzilla 1283 - Spec typo.
1570 Bugzilla 1290 - Spec grammar fixes.
1572 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1574 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1576 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1577 mailing list by by Dmitry Isaikin.
1579 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1581 JH/02 Support "G" suffix to numbers in ${if comparisons.
1583 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1585 NM/01 Bugzilla 1197 - Spec typo
1586 Bugzilla 1196 - Spec examples corrections
1588 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1590 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1591 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1594 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1595 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1597 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1598 "acl {{name}{arg}...}", and optional args on acl condition
1601 JH/05 Permit multiple router/transport headers_add/remove lines.
1603 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1605 JH/07 Avoid using a waiting database for a single-message-only transport.
1606 Performance patch from Paul Fisher. Bugzilla 1262.
1608 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1611 JH/09 Add $headers_added variable, with content from use of ACL modifier
1612 add_header (but not yet added to the message). Bugzilla 199.
1614 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1615 Pulled from Bugzilla 817 by Wolfgang Breyha.
1617 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1619 (nb: this is the same fix as in Exim 4.80.1)
1621 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1624 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1627 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1629 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1630 advertise SMTP AUTH mechanism to us, instead of a generic
1631 protocol violation error. Also, make Exim more robust to bad
1632 data from the Dovecot auth socket.
1634 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1636 When a queue runner is handling a message, Exim first routes the
1637 recipient addresses, during which it prunes them based on the retry
1638 hints database. After that it attempts to deliver the message to
1639 any remaining recipients. It then updates the hints database using
1642 So if a recipient address works intermittently, it can get repeatedly
1643 deferred at routing time. The retry hints record remains fresh so the
1644 address never reaches the final cutoff time.
1646 This is a fairly common occurrence when a user is bumping up against
1647 their storage quota. Exim had some logic in its local delivery code
1648 to deal with this. However it did not apply to per-recipient defers
1649 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1651 This change adds a proper retry rule check during routing so that the
1652 final cutoff time is checked against the message's age. We only do
1653 this check if there is an address retry record and there is not a
1654 domain retry record; this implies that previous attempts to handle
1655 the address had the retry_use_local_parts option turned on. We use
1656 this as an approximation for the destination being like a local
1657 delivery, as in LMTP.
1659 I suspect this new check makes the old local delivery cutoff check
1660 redundant, but I have not verified this so I left the code in place.
1662 TF/02 Correct gecos expansion when From: is a prefix of the username.
1664 Test 0254 submits a message to Exim with the header
1668 When I ran the test suite under the user fanf2, Exim expanded
1669 the header to contain my full name, whereas it should have added
1670 a Resent-Sender: header. It erroneously treats any prefix of the
1671 username as equal to the username.
1673 This change corrects that bug.
1675 GF/01 DCC debug and logging tidyup
1676 Error conditions log to paniclog rather than rejectlog.
1677 Debug lines prefixed by "DCC: " to remove any ambiguity.
1679 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1681 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1682 Bug spotted by Jeremy Harris; was flawed since initial commit.
1683 Would have resulted in OCSP responses post-SNI triggering an Exim
1684 NULL dereference and crash.
1686 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1688 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1689 Bug detection, analysis and fix by Samuel Thibault.
1690 Bugzilla 1331, Debian bug #698092.
1692 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1694 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1695 Server implementation by Todd Lyons, client by JH.
1696 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1697 config variable "prdr_enable" controls whether the server
1698 advertises the facility. If the client requests PRDR a new
1699 acl_data_smtp_prdr ACL is called once for each recipient, after
1700 the body content is received and before the acl_smtp_data ACL.
1701 The client is controlled by both of: a hosts_try_prdr option
1702 on the smtp transport, and the server advertisement.
1703 Default client logging of deliveries and rejections involving
1704 PRDR are flagged with the string "PRDR".
1706 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1707 fclose(). Diagnosis by Todd Lyons.
1709 PP/17 Update configure.default to handle IPv6 localhost better.
1710 Patch by Alain Williams (plus minor tweaks).
1713 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1714 This is now consistent with GnuTLS, and is now documented: the
1715 previous undocumented portable approach to treating the option as
1716 unset was to force an expansion failure. That still works, and
1717 an empty string is now equivalent.
1719 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1720 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1721 not performing validation itself.
1723 PP/20 Added force_command boolean option to pipe transport.
1724 Patch from Nick Koston, of cPanel Inc.
1726 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1729 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1731 PP/21 Fix eximon continuous updating with timestamped log-files.
1732 Broken in a format-string cleanup in 4.80, missed when I repaired the
1733 other false fix of the same issue.
1734 Report and fix from Heiko Schlichting.
1737 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1738 Report from Prashanth Katuri.
1740 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1741 It's SecureTransport, so affects any MacOS clients which use the
1742 system-integrated TLS libraries, including email clients.
1744 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1745 using a MIME ACL for non-SMTP local injection.
1746 Report and assistance in diagnosis by Warren Baker.
1748 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1750 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1752 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1753 last id that failed so it may be referenced in subsequent ACL's.
1755 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1758 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1759 ldap library initialization, allowing self-signed CA's to be
1760 used. Also properly sets require_cert option later in code by
1761 using NULL (global ldap config) instead of ldap handle (per
1762 session). Bug diagnosis and testing by alxgomz.
1764 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1765 the src/util/ subdirectory.
1767 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1768 renamed to Transport Post Delivery Action by Jeremy Harris, as
1771 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1772 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1773 redis_servers = needs to be configured which will be used by the redis
1774 lookup. Patch from Warren Baker, of The Packet Hub.
1776 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1778 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1779 hostname or reverse DNS when processing a host list. Used suggestions
1780 from multiple comments on this bug.
1782 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1784 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1785 Missed a few lines, added it to make the runtest require no keyboard
1788 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1789 contains upper case chars. Make router use caseful_local_part.
1791 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1792 support when GnuTLS has been built with p11-kit.
1798 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1800 This, or similar/improved, will also be change PP/11 of 4.82.
1806 PP/01 Handle short writes when writing local log-files.
1807 In practice, only affects FreeBSD (8 onwards).
1808 Bugzilla 1053, with thanks to Dmitry Isaikin.
1810 NM/01 Bugzilla 949 - Documentation tweak
1812 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1815 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1817 PP/02 Implemented gsasl authenticator.
1819 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1821 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1822 `pkg-config foo` for cflags/libs.
1824 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1825 with rest of GSASL and with heimdal_gssapi.
1827 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1828 `pkg-config foo` for cflags/libs for the TLS implementation.
1830 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1831 properties get this fed in as external SSF. A number of robustness
1832 and debugging improvements to the cyrus_sasl authenticator.
1834 PP/08 cyrus_sasl server now expands the server_realm option.
1836 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1837 Patch by Jeremy Harris.
1839 PP/10 Added dbmjz lookup type.
1841 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1843 PP/12 MAIL args handles TAB as well as SP, for better interop with
1844 non-compliant senders.
1845 Analysis and variant patch by Todd Lyons.
1847 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1848 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1849 Patch from Dirk Mueller <dmueller@suse.com>
1851 PP/13 tls_peerdn now print-escaped for spool files.
1852 Observed some $tls_peerdn in wild which contained \n, which resulted
1853 in spool file corruption.
1855 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1856 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1857 or write after TLS renegotiation, which otherwise led to messages
1860 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1861 as a tracking header (ie: a signed header comes before the signature).
1862 Patch from Wolfgang Breyha.
1864 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1865 comma-sep list; embedded commas doubled.
1867 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1869 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1871 Report and patch from Dmitry Banschikov.
1873 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1874 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1875 failures. We appear to now support TLS1.1+ with Exim.
1877 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1878 lets Exim select keys and certificates based upon TLS SNI from client.
1879 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1880 before an outbound SMTP session. New log_selector, +tls_sni.
1882 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1883 NULL dereference. Report and patch from Alun Jones.
1885 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1886 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1887 Not seeing resolver debug output on NetBSD, but suspect this is a
1888 resolver implementation change.
1890 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1891 Left warnings. Added "eximon gdb" invocation mode.
1893 PP/21 Defaulting "accept_8bitmime" to true, not false.
1895 PP/22 Added -bw for inetd wait mode support.
1897 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1898 locate the relevant includes and libraries. Made this the default.
1900 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1901 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1903 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1904 This may cause build issues on older platforms.
1906 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1907 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1908 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1909 Added SNI support via GnuTLS too.
1910 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1912 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1914 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1915 Applied second patch from Janne, implementing suggestion to default
1916 multiple-strings-in-record handling to match SPF spec.
1918 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1920 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1921 read-only, out of scope).
1922 Patch from Wolfgang Breyha, report from Stuart Northfield.
1924 PP/29 Fix three issues highlighted by clang analyser static analysis.
1925 Only crash-plausible issue would require the Cambridge-specific
1926 iplookup router and a misconfiguration.
1927 Report from Marcin Mirosław.
1929 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1931 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1932 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1933 As part of this, removing so much warning spew let me fix some minor
1934 real issues in debug logging.
1936 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1937 assignment on my part. Fixed.
1939 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1940 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1941 Janne Snabb (who went above and beyond: thank you).
1943 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1944 string otherwise requires a connection and a bunch more work and it's
1945 relatively easy to get wrong. Should also expose TLS library linkage
1948 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1949 64-bit ${eval} (JH/03).
1951 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1952 GNU libc to support some of the 64-bit stuff, should not lead to
1953 conflicts. Defined before os.h is pulled in, so if a given platform
1954 needs to override this, it can.
1956 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1957 protection layer was required, which is not implemented.
1958 Bugzilla 1254, patch from Wolfgang Breyha.
1960 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1961 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1962 tls_dhparam take prime identifiers. Also unbreak combination of
1963 OpenSSL+DH_params+TLSSNI.
1965 PP/39 Disable SSLv2 by default in OpenSSL support.
1971 PP/01 Solaris build fix for Oracle's LDAP libraries.
1972 Bugzilla 1109, patch from Stephen Usher.
1974 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1976 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1979 TF/02 Fix a couple more cases where we did not log the error message
1980 when unlink() failed. See also change 4.74-TF/03.
1982 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1983 lock up or crash if it happened to be inside a call to libc when it
1984 got a SIGUSR1 from exiwhat.
1986 The SIGUSR1 handler appends the current process status to the process
1987 log which is later printed by exiwhat. It used to use the general
1988 purpose logging code to do this, but several functions it calls are
1989 not safe for signals.
1991 The new output code in the SIGUSR1 handler is specific to the process
1992 log, and simple enough that it's easy to inspect for signal safety.
1993 Removing some special cases also simplifies the general logging code.
1994 Removing the spurious timestamps from the process log simplifies
1997 TF/04 Improved ratelimit ACL condition.
1999 The /noupdate option has been deprecated in favour of /readonly which
2000 has clearer semantics. The /leaky, /strict, and /readonly update modes
2001 are mutually exclusive. The update mode is no longer included in the
2002 database key; it just determines when the database is updated. (This
2003 means that when you upgrade Exim will forget old rate measurements.)
2005 Exim now checks that the per_* options are used with an update mode that
2006 makes sense for the current ACL. For example, when Exim is processing a
2007 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2008 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2009 must specify per_mail/readonly. If you omit the update mode it defaults to
2010 /leaky where that makes sense (as before) or /readonly where required.
2012 The /noupdate option is now undocumented but still supported for
2013 backwards compatibility. It is equivalent to /readonly except that in
2014 ACLs where /readonly is required you may specify /leaky/noupdate or
2015 /strict/noupdate which are treated the same as /readonly.
2017 A useful new feature is the /count= option. This is a generalization
2018 of the per_byte option, so that you can measure the throughput of other
2019 aggregate values. For example, the per_byte option is now equivalent
2020 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2022 The per_rcpt option has been generalized using the /count= mechanism
2023 (though it's more complicated than the per_byte equivalence). When it is
2024 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2025 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2026 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2027 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2028 Note that using per_rcpt with a non-readonly update mode in more than
2029 one ACL will cause the recipients to be double-counted. (The per_mail
2030 and per_byte options don't have this problem.)
2032 The handling of very low rates has changed slightly. If the computed rate
2033 is less than the event's count (usually one) then this event is the first
2034 after a long gap. In this case the rate is set to the same as this event's
2035 count, so that the first message of a spam run is counted properly.
2037 The major new feature is a mechanism for counting the rate of unique
2038 events. The new per_addr option counts the number of different
2039 recipients that someone has sent messages to in the last time period. It
2040 behaves like per_rcpt if all the recipient addresses are different, but
2041 duplicate recipient addresses do not increase the measured rate. Like
2042 the /count= option this is a general mechanism, so the per_addr option
2043 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2044 example, measure the rate that a client uses different sender addresses
2045 with the options per_mail/unique=$sender_address. There are further
2046 details in the main documentation.
2048 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2050 TF/06 Removed a few PCRE remnants.
2052 TF/07 Automatically extract Exim's version number from tags in the git
2053 repository when doing development or release builds.
2055 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2056 Bugzilla 879. Patch from Paul Fisher.
2058 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2059 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2062 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2064 PP/05 Variable $av_failed, true if the AV scanner deferred.
2065 Bugzilla 1078. Patch from John Horne.
2067 PP/06 Stop make process more reliably on build failure.
2068 Bugzilla 1087. Patch from Heiko Schlittermann.
2070 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2071 Bugzilla 1089. Patch from Heiko Schlittermann.
2073 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2074 Bugzilla 1131. Patch from Holger Weiß.
2076 PP/09 Handle IPv6 addresses with SPF.
2077 Bugzilla 860. Patch from Wolfgang Breyha.
2079 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2081 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2084 PP/11 match_* no longer expand right-hand-side by default.
2085 New compile-time build option, EXPAND_LISTMATCH_RHS.
2086 New expansion conditions, "inlist", "inlisti".
2088 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2090 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2092 PP/14 fix log_write() format string regression from TF/03.
2093 Bugzilla 1152. Patch from Dmitry Isaikin.
2099 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2101 PP/02 Harmonised TLS library version reporting; only show if debugging.
2102 Layout now matches that introduced for other libraries in 4.74 PP/03.
2104 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2106 PP/04 New "dns_use_edns0" global option.
2108 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2111 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2112 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2114 TK/01 Updated PolarSSL code to 0.14.2.
2115 Bugzilla 1097. Patch from Andreas Metzler.
2117 PP/07 Catch divide-by-zero in ${eval:...}.
2118 Fixes bugzilla 1102.
2120 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2123 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2124 format-string attack -- SECURITY: remote arbitrary code execution.
2126 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2127 time unintentionally subject to list matching rules, letting the header
2128 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2129 arbitrary string expansion). This allowed for information disclosure.
2131 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2132 INT_MIN/-1 -- value coerced to INT_MAX.
2138 NM/01 Workaround for PCRE version dependency in version reporting
2141 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2142 This fixes portability to compilers other than gcc, notably
2143 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2145 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2146 makefiles for portability to HP-UX and POSIX correctness.
2148 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2149 Also via indented variable definition in the Makefile.
2150 (Debugging by Oliver Heesakkers).
2152 PP/02 Restore caching of spamd results with expanded spamd_address.
2153 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2155 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2156 Improves build reliability. Fix from: Frank Elsner
2158 NM/02 Fix wide character breakage in the rfc2047 coding
2159 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2161 NM/03 Allow underscore in dnslist lookups
2162 Fixes bug 1026. Patch from Graeme Fowler
2164 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2165 Code patches from Adam Ciarcinski of NetBSD.
2167 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2170 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2171 is logged, to avoid truncation. Patch from John Horne.
2173 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2174 Patch from Jakob Hirsch.
2176 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2177 SQL string expansion failure details.
2178 Patch from Andrey Oktyabrski.
2180 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2181 Patch from Simon Arlott.
2183 PP/09 New lookups functionality failed to compile on old gcc which rejects
2184 extern declarations in function scope.
2185 Patch from Oliver Fleischmann
2187 PP/10 Use sig_atomic_t for flags set from signal handlers.
2188 Check getgroups() return and improve debugging.
2189 Fixed developed for diagnosis in bug 927 (which turned out to be
2192 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2193 Patch from Mark Zealey.
2195 PP/12 Bugzilla 1056: Improved spamd server selection.
2196 Patch from Mark Zealey.
2198 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2199 Based on patch from Heiko Schlittermann.
2201 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2202 Patch from Uwe Doering, sign-off by Michael Haardt.
2204 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2205 variable declaration deep within a block. Bug and patch from
2208 PP/15 lookups-Makefile IRIX compatibility coercion.
2210 PP/16 Make DISABLE_DKIM build knob functional.
2212 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2213 Patch by Simon Arlott
2215 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2216 variable argument macros. Our copy now differs from upstream.
2222 TF/01 Failure to get a lock on a hints database can have serious
2223 consequences so log it to the panic log.
2225 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2226 controlled using the smtp_confirmation log selector.
2228 TF/03 Include the error message when we fail to unlink a spool file.
2230 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2231 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2232 for maintaining out-of-tree patches for some time.
2234 PP/01 Bugzilla 139: Documentation and portability issues.
2235 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2236 Handle per-OS dynamic-module compilation flags.
2238 PP/02 Let /dev/null have normal permissions.
2239 The 4.73 fixes were a little too stringent and complained about the
2240 permissions on /dev/null. Exempt it from some checks.
2241 Reported by Andreas M. Kirchwitz.
2243 PP/03 Report version information for many libraries, including
2244 Exim version information for dynamically loaded libraries. Created
2245 version.h, now support a version extension string for distributors
2246 who patch heavily. Dynamic module ABI change.
2248 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2249 privilege escalation vulnerability whereby the Exim run-time user
2250 can cause root to append content of the attacker's choosing to
2253 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2256 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2257 If dropping privileges for untrusted macros, we disabled normal logging
2258 on the basis that it would fail; for the Exim run-time user, this is not
2259 the case, and it resulted in successful deliveries going unlogged.
2260 Fixed. Reported by Andreas Metzler.
2266 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2267 only prepend for the Resent-* case. Fixes regression introduced in
2268 Exim 4.70 by NM/22 for Bugzilla 607.
2270 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2271 increasing numbers of administrators be bitten by this.
2273 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2275 PP/03 Bugzilla 994: added openssl_options main configuration option.
2277 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2279 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2281 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2283 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2284 without a peer certificate, leading to a segfault because of an
2285 assumption that peers always have certificates. Be a little more
2286 paranoid. Problem reported by Martin Tscholak.
2288 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2289 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2290 NB: ClamAV planning to remove STREAM in "middle of 2010".
2291 CL also introduces -bmalware, various -d+acl logging additions and
2292 more caution in buffer sizes.
2294 PP/09 Implemented reverse_ip expansion operator.
2296 PP/10 Bugzilla 937: provide a "debug" ACL control.
2298 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2300 PP/12 Bugzilla 973: Implement --version.
2302 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2304 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2306 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2308 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2309 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2310 ignore trailing whitespace.
2312 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2314 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2317 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2318 Notification from Dr Andrew Aitchison.
2320 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2321 ExtendedDetectionInfo response format.
2322 Notification from John Horne.
2324 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2327 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2328 XSL and documented dependency on system catalogs, with examples of how
2331 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2334 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2335 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2336 configuration file which is writeable by the Exim user or group.
2338 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2339 of configuration files to cover files specified with the -C option if
2340 they are going to be used with root privileges, not just the default
2343 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2344 option (effectively making it always true).
2346 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2347 files to be used while preserving root privileges.
2349 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2350 that rogue child processes cannot use them.
2352 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2353 run-time user, instead of root.
2355 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2356 Exim run-time user without dropping privileges.
2358 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2359 result string, instead of calling string_vformat() twice with the same
2362 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2363 for other users. Others should always drop root privileges if they use
2364 -C on the command line, even for a whitelisted configure file.
2366 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2368 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2374 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2375 $data_path, and $header_path variables; fixed documentation bugs and
2378 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2379 exipick to access non-standard spools, including the "frozen" queue
2382 NM/01 Bugzilla 965: Support mysql stored procedures.
2383 Patch from Alain Williams
2385 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2387 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2388 Patch from Andreas Metzler
2390 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2391 Patch from Kirill Miazine
2393 NM/05 Bugzilla 671: Added umask to procmail example.
2395 JJ/03 installed exipick 20100323.0, fixing doc bug
2397 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2398 directory. Notification and patch from Dan Rosenberg.
2400 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2402 TK/02 Improve log output when DKIM signing operation fails.
2404 MH/01 Treat the transport option dkim_domain as a colon separated
2405 list, not as a single string, and sign the message with each element,
2406 omitting multiple occurences of the same signer.
2408 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2409 Bugzilla 985, 986. Patch by Simon Arlott
2411 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2412 Patch by Simon Arlott
2414 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2415 MBX locking. Notification from Dan Rosenberg.
2421 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2423 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2425 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2427 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2429 NM/04 Bugzilla 915: Flag broken perl installation during build.
2435 TK/01 Added patch by Johannes Berg that expands the main option
2436 "spamd_address" if it starts with a dollar sign.
2438 TK/02 Write list of recipients to X-Envelope-Sender header when building
2439 the mbox-format spool file for content scanning (suggested by Jakob
2442 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2443 (http://www.dcc-servers.net/) support via dccifd. Activated by
2444 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2446 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2447 by Mark Daniel Reidel <mr@df.eu>.
2449 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2450 When building exim an external PCRE library is now needed -
2451 PCRE is a system library on the majority of modern systems.
2452 See entry on PCRE_LIBS in EDITME file.
2454 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2455 conversation. Added nologin parameter to request.
2456 Patch contributed by Kirill Miazine.
2458 TF/01 Do not log submission mode rewrites if they do not change the address.
2460 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2462 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2463 log files in place. Contributed by Roberto Lima.
2465 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2467 TF/03 Bugzilla 615: When checking the local_parts router precondition
2468 after a local_part_suffix or local_part_prefix option, Exim now
2469 does not use the address's named list lookup cache, since this
2470 contains cached lookups for the whole local part.
2472 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2473 Robert Millan. Documentation is in experimental-spec.txt.
2475 TF/04 Bugzilla 668: Fix parallel build (make -j).
2477 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2479 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2480 Patch provided by Jan Srzednicki.
2482 TF/05 Leading white space used to be stripped from $spam_report which
2483 wrecked the formatting. Now it is preserved.
2485 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2486 that they are available at delivery time.
2488 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2490 TF/08 TLS error reporting now respects the incoming_interface and
2491 incoming_port log selectors.
2493 TF/09 Produce a more useful error message if an SMTP transport's hosts
2494 setting expands to an empty string.
2496 NM/06 Bugzilla 744: EXPN did not work under TLS.
2497 Patch provided by Phil Pennock.
2499 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2500 Patch provided by Richard Godbee.
2502 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2503 acl_smtp_notquit, added index entry.
2505 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2506 Patch provided by Eugene Bujak.
2508 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2509 accept(). Patch provided by Maxim Dounin.
2511 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2512 Patch provided by Phil Pennock.
2514 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2516 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2517 Patch provided by Brad "anomie" Jorsch.
2519 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2520 Patch provided by Dean Brooks.
2522 TK/05 Add native DKIM support (does not depend on external libraries).
2524 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2525 Patch provided by Graeme Fowler.
2527 NM/16 Bugzilla 851: Documentation example syntax fix.
2529 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2531 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2534 NM/19 Bugzilla 745: TLS version reporting.
2535 Patch provided by Phil Pennock.
2537 NM/20 Bugzilla 167: bool: condition support.
2538 Patch provided by Phil Pennock.
2540 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2541 clients. Patch provided by Phil Pennock.
2543 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2544 Patch provided by Brad "anomie" Jorsch.
2546 NM/23 Bugzilla 687: Fix misparses in eximstats.
2547 Patch provided by Heiko Schlittermann.
2549 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2550 Patch provided by Heiko Schlittermann.
2552 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2553 plus update to original patch.
2555 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2557 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2558 Patch provided by David Brownlee.
2560 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2562 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2564 NM/30 Bugzilla 888: TLS documentation bugfixes.
2566 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2568 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2569 Unlike the original bugzilla I have changed all shell scripts in src tree.
2571 NM/33 Bugzilla 898: Transport filter timeout fix.
2572 Patch by Todd Rinaldo.
2574 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2575 Patch by Serge Demonchaux.
2577 NM/35 Bugzilla 39: Base64 decode bug fixes.
2578 Patch by Jakob Hirsch.
2580 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2582 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2584 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2586 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2592 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2593 ALT-N's libdkim that I have put here:
2594 http://duncanthrax.net/exim-experimental/
2596 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2597 were called 'true' and it seems that C99 defines that as a reserved
2598 keyword to be used with 'bool' variable types. That means you could
2599 not include C99-style headers which use bools without triggering
2600 build errors in sieve.c.
2602 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2603 as mailq or other aliases. Changed the --help handling significantly
2604 to do whats expected. exim_usage() emits usage/help information.
2606 SC/01 Added the -bylocaldomain option to eximstats.
2608 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2610 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2612 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2618 PH/01 Another patch from the Sieve maintainer.
2620 PH/02 When an IPv6 address is converted to a string for single-key lookup
2621 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2622 dots are used instead of colons so that keys in lsearch files need not
2623 contain colons. This was done some time before quoting was made available
2624 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2625 (notated using the quote facility) so as to distinguish them from IPv4
2626 keys. This meant that lookups for IP addresses in host lists did not work
2627 for iplsearch lookups.
2629 This has been fixed by arranging for IPv6 addresses to be expressed with
2630 colons if the lookup type is iplsearch. This is not incompatible, because
2631 previously such lookups could never work.
2633 The situation is now rather anomalous, since one *can* have colons in
2634 ordinary lsearch keys. However, making the change in all cases is
2635 incompatible and would probably break a number of configurations.
2637 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2640 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2641 conversion specification without a maximum field width, thereby enabling
2642 a rogue spamd server to cause a buffer overflow. While nobody in their
2643 right mind would setup Exim to query an untrusted spamd server, an
2644 attacker that gains access to a server running spamd could potentially
2645 exploit this vulnerability to run arbitrary code as the Exim user.
2647 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2648 $primary_hostname instead of what libspf2 thinks the hosts name is.
2650 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2651 a directory entry by the name of the lookup key. Previously, if a
2652 symlink pointed to a non-existing file or a file in a directory that
2653 Exim lacked permissions to read, a lookup for a key matching that
2654 symlink would fail. Now it is enough that a matching directory entry
2655 exists, symlink or not. (Bugzilla 503.)
2657 PH/03 The body_linecount and body_zerocount variables are now exported in the
2660 PH/04 Added the $dnslist_matched variable.
2662 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2663 This means they are set thereafter only if the connection becomes
2666 PH/06 Added the client_condition to authenticators so that some can be skipped
2667 by clients under certain conditions.
2669 PH/07 The error message for a badly-placed control=no_multiline_responses left
2670 "_responses" off the end of the name.
2672 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2674 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2675 (without spaces) instead of just copying the configuration text.
2677 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2679 PH/11 Added $max_received_linelength.
2681 PH/12 Added +ignore_defer and +include_defer to host lists.
2683 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2684 way in which PCRE > 7.0 is built.
2686 PH/14 Implemented queue_only_load_latch.
2688 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2689 MAIL command. The effect was to mangle the value on 64-bit systems.
2691 PH/16 Another patch from the Sieve maintainer.
2693 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2695 PH/18 If a system quota error occurred while trying to create the file for
2696 a maildir delivery, the message "Mailbox is full" was not appended to the
2697 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2698 only to a quota excession during the actual writing of the file.
2700 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2701 characters?) which causes problems in log lines. The DN values are now
2702 passed through string_printing() before being added to log lines.
2704 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2705 and InterBase are left for another time.)
2707 PH/21 Added message_body_newlines option.
2709 PH/22 Guard against possible overflow in moan_check_errorcopy().
2711 PH/23 POSIX allows open() to be a macro; guard against that.
2713 PH/24 If the recipient of an error message contained an @ in the local part
2714 (suitably quoted, of course), incorrect values were put in $domain and
2715 $local_part during the evaluation of errors_copy.
2721 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2722 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2725 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2726 issue a MAIL command.
2728 PH/02 In an ACL statement such as
2730 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2732 if a client was not listed at all, or was listed with a value other than
2733 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2734 the condition was not true (as it should be), so access was not denied.
2735 The bug was that the ! inversion was incorrectly passed on to the second
2736 item. This has been fixed.
2738 PH/03 Added additional dnslists conditions == and =& which are different from
2739 = and & when the dns lookup returns more than one IP address.
2741 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2742 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2744 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2745 FSYNC, which compiles an option called disable_fsync that allows for
2746 bypassing fsync(). The documentation is heavily laced with warnings.
2748 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2750 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2751 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2752 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2753 including adding "make clean"; (3) Added -fPIC when compiling the test
2754 dynamically loaded module, to get rid of a warning.
2756 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2757 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2758 = 0s. The bug is otherwise harmless.
2760 PH/07 There was a bug in the dovecot authenticator such that the value of
2761 $auth1 could be overwritten, and so not correctly preserved, after a
2762 successful authentication. This usually meant that the value preserved by
2763 the server_setid option was incorrect.
2765 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2767 PH/09 Installed PCRE release 7.0.
2769 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2770 run for batched SMTP input. It is now run at the start of every message
2771 in the batch. While fixing this I discovered that the process information
2772 (output by running exiwhat) was not always getting set for -bs and -bS
2773 input. This is fixed, and it now also says "batched" for BSMTP.
2775 PH/11 Added control=no_pipelining.
2777 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2778 patch, slightly modified), and move the expansion of helo_data till after
2779 the connection is made in the smtp transport (so it can use these
2782 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2784 PH/14 Added log_selector = +pid.
2786 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2788 PH/16 Add ${if forany and ${if forall.
2790 PH/17 Added dsn_from option to vary the From: line in DSNs.
2792 PH/18 Flush SMTP output before performing a callout, unless control =
2793 no_callout_flush is set.
2795 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2796 was true (the default) a successful delivery failed to delete the retry
2797 item, thus causing premature timeout of the address. The bug is now
2800 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2802 PH/21 Long custom messages for fakedefer and fakereject are now split up
2803 into multiline responses in the same way that messages for "deny" and
2804 other ACL rejections are.
2806 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2807 with slight modification.
2809 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2810 draft, changing the syntax and factoring some duplicate code".
2812 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2813 for deliveries of the second and subsequent messages over the same SMTP
2816 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2817 ${reduce, with only minor "tidies".
2819 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2821 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2822 expansion side effects.
2824 PH/27 When a message times out after an over-quota error from an Exim-imposed
2825 quota, the bounce message says "mailbox is full". This message was not
2826 being given when it was a system quota that was exceeded. It now should
2829 MH/03 Made $recipients available in local_scan(). local_scan() already has
2830 better access to the recipient list through recipients_list[], but
2831 $recipients can be useful in postmaster-provided expansion strings.
2833 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2834 in the case of a MAIL command with additional options following the
2835 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2836 were accidentally chopped off.
2838 PH/29 SMTP synchronization checks are implemented when a command is read -
2839 there is a check that no more input is waiting when there shouldn't be
2840 any. However, for some commands, a delay in an ACL can mean that it is
2841 some time before the response is written. In this time, more input might
2842 arrive, invalidly. So now there are extra checks after an ACL has run for
2843 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2844 pipelining has not been advertised.
2846 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2848 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2849 returned in the SMTP response when smtp_return_error_details was false.
2850 This has been fixed.
2852 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2853 instead of the C I/O that was originally supplied, because problems were
2854 reported on Solaris.
2856 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2857 Exim which did not show up earlier: it was assuming that a call to
2858 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2859 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2860 was a macro that became an assignment, so it seemed to work. This has
2861 changed to a proper function call with a void return, hence the compile
2862 error. Exim's code has been fixed.
2864 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2867 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2869 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2871 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2872 because it turns out to be too big or there is a timeout) there is no
2873 "Completed" line in the log. When some messages of this type were
2874 selected by exigrep, they were listed as "not completed". Others were
2875 picked up by some special patterns. I have improved the selection
2876 criteria to be more general.
2878 PH/38 The host_find_failed option in the manualroute router can now be set
2879 to "ignore", to completely ignore a host whose IP address cannot be
2880 found. If all hosts are ignored, the behaviour is controlled by the new
2881 host_all_ignored option.
2883 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2884 homing or because of multiple MX records with /mx) generated more than
2885 one IP address, and the following item turned out to be the local host,
2886 all the secondary addresses of the first item were incorrectly removed
2887 from the list, along with the local host and any following hosts (which
2888 is what is supposed to happen).
2890 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2891 whoever called Exim into the -H file. In the case of the daemon it was
2892 behaving confusingly. When first started, it used values for whoever
2893 started the daemon, but after a SIGHUP it used the Exim user (because it
2894 calls itself on a restart). I have changed the code so that it now always
2897 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2898 message are rejected with the same error (e.g. no authentication or bad
2899 sender address), and a DATA command is nevertheless sent (as can happen
2900 with PIPELINING or a stupid MUA), the error message that was given to the
2901 RCPT commands is included in the rejection of the DATA command. This is
2902 intended to be helpful for MUAs that show only the final error to their
2905 PH/42 Another patch from the Sieve maintainer.
2907 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2908 Eximstats - Fixed some broken HTML links and added missing column headers
2910 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2911 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2913 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2915 PH/43 Yet another patch from the Sieve maintainer.
2917 PH/44 I found a way to check for a TCP/IP connection going away before sending
2918 the response to the final '.' that terminates a message, but only in the
2919 case where the client has not sent further data following the '.'
2920 (unfortunately, this is allowed). However, in many cases there won't be
2921 any further data because there won't be any more messages to send. A call
2922 to select() can be used: if it shows that the input is "ready", there is
2923 either input waiting, or the socket has been closed. An attempt to read
2924 the next input character can distinguish the two cases. Previously, Exim
2925 would have sent an OK response which the client would never have see.
2926 This could lead to message repetition. This fix should cure that, at
2927 least in a lot of common cases.
2929 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2930 advertised in response to EHLO.
2936 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2937 fixed by 4.65/MH/01 (is this a record?) are fixed:
2939 (i) An empty string was always treated as zero by the numeric comparison
2940 operators. This behaviour has been restored.
2942 (ii) It is documented that the numeric comparison operators always treat
2943 their arguments as decimal numbers. This was broken in that numbers
2944 starting with 0 were being interpreted as octal.
2946 While fixing these problems I realized that there was another issue that
2947 hadn't been noticed. Values of message_size_limit (both the global option
2948 and the transport option) were treated as octal if they started with 0.
2949 The documentation was vague. These values are now always treated as
2950 decimal, and I will make that clear in the documentation.
2956 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2957 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2960 MH/01 Don't check that the operands of numeric comparison operators are
2961 integers when their expansion is in "skipping" mode (fixes bug
2962 introduced by 4.64-PH/07).
2964 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2965 child addresses, Exim now panics and dies. Previously, because the count
2966 is held in a short int, deliveries were likely to be lost. As such a
2967 large number of recipients for a single message is ridiculous
2968 (performance will be very, very poor), I have chosen to impose a limit
2969 rather than extend the field.
2975 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2976 leftover -K file (the existence of which was triggered by #402).
2977 While we were at it, introduced process PID as part of the -K
2978 filename. This should rule out race conditions when creating
2981 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2982 processing considerably. Previous code took too long for large mails,
2983 triggering a timeout which in turn triggers #401.
2985 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2986 in the DK code in transports.c. sendfile() is not really portable,
2987 hence the _LINUX specificness.
2989 TF/01 In the add_headers option to the mail command in an Exim filter,
2990 there was a bug that Exim would claim a syntax error in any
2991 header after the first one which had an odd number of characters
2994 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2995 callout verification, Exim cached a "reject" for the entire domain. This
2996 is correct for most verifications, but it is not correct for a recipient
2997 verification with use_sender or use_postmaster set, because in that case
2998 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2999 case of MAIL FROM:<> rejection from other early rejections (e.g.
3000 rejection of HELO). When verifying a recipient using a non-null MAIL
3001 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3002 Whatever the result of the callout, the value of the domain cache is
3003 left unchanged (for any other kind of callout, getting as far as trying
3004 RCPT means that the domain itself is ok).
3006 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3009 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3010 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3011 session, the daemon ignores ECONNECT errors and logs others; it now
3012 ignores EPIPE as well.
3014 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3015 (quoted-printable decoding).
3017 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3018 later the small subsequent patch to fix an introduced bug.
3020 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3022 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3024 PH/08 An error is now given if message_size_limit is specified negative.
3026 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3027 to be given (somewhat) arbitrary names.
3029 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3032 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3033 miscellaneous code fixes
3035 PH/10 Added the log_reject_target ACL modifier to specify where to log
3038 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3039 hostname. This is wrong, because it relates to the incoming message (and
3040 probably the interface on which it is arriving) and not to the outgoing
3041 callout (which could be using a different interface). This has been
3042 changed to use the value of the helo_data option from the smtp transport
3043 instead - this is what is used when a message is actually being sent. If
3044 there is no remote transport (possible with a router that sets up host
3045 addresses), $smtp_active_hostname is used.
3047 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3048 tweaks were necessary in order to get it to work (see also 21 below):
3049 (a) The code assumed that strncpy() returns a negative number on buffer
3050 overflow, which isn't the case. Replaced with Exim's string_format()
3052 (b) There were several signed/unsigned issues. I just did the minimum
3053 hacking in of casts. There is scope for a larger refactoring.
3054 (c) The code used strcasecmp() which is not a standard C function.
3055 Replaced with Exim's strcmpic() function.
3056 (d) The code set only $1; it now sets $auth1 as well.
3057 (e) A simple test gave the error "authentication client didn't specify
3058 service in request". It would seem that Dovecot has changed its
3059 interface. Fortunately there's a specification; I followed it and
3060 changed what the client sends and it appears to be working now.
3062 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3065 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3066 address A is aliased to B and C, where B exists and C does not. Without
3067 -v the output is "A verified" because verification stops after a
3068 successful redirection if more than one address is generated. However,
3069 with -v the child addresses are also verified. Exim was outputting "A
3070 failed to verify" and then showing the successful verification for C,
3071 with its parentage. It now outputs "B failed to verify", showing B's
3072 parentage before showing the successful verification of C.
3074 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3075 look up a TXT record in a specific list after matching in a combined
3078 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3079 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3080 they consult the DNS. I had assumed they would set it the way they
3081 wanted; and indeed my experiments on Linux seem to show that in some
3082 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3083 To be on the safe side, however, I have now made the interface to
3084 host_find_byname() similar to host_find_bydns(), with an argument
3085 containing the DNS resolver options. The host_find_byname() function now
3086 sets these options at its start, just as host_find_bydns() does. The smtp
3087 transport options dns_qualify_single and dns_search_parents are passed to
3088 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3089 of host_find_byname() use the default settings of RES_DEFNAMES
3090 (qualify_single) but not RES_DNSRCH (search_parents).
3092 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3093 spool_read_header() do less string testing, by means of a preliminary
3094 switch on the second character of optional "-foo" lines. (This is
3095 overdue, caused by the large number of possibilities that now exist.
3096 Originally there were few.) While I was there, I also converted the
3097 str(n)cmp tests so they don't re-test the leading "-" and the first
3098 character, in the hope this might squeeze out yet more improvement.
3100 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3101 flag allowing group syntax was set by the header_syntax check but not
3102 turned off, possible causing trouble later; (2) The flag was not being
3103 set at all for the header_verify test, causing "group"-style headers to
3104 be rejected. I have now set it in this case, and also caused header_
3105 verify to ignore an empty address taken from a group. While doing this, I
3106 came across some other cases where the code for allowing group syntax
3107 while scanning a header line wasn't quite right (mostly, not resetting
3108 the flag correctly in the right place). These bugs could have caused
3109 trouble for malformed header lines. I hope it is now all correct.
3111 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3112 with the "reply" argument non-NULL. The code, however (which originally
3113 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3114 but it didn't always do it. This confused somebody who was copying the
3115 code for some other use. I have removed all the tests.
3117 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3118 feature that was used to support insecure browsers during the U.S. crypto
3119 embargo. It requires special client support, and Exim is probably the
3120 only MTA that supported it -- and would never use it because real RSA is
3121 always available. This code has been removed, because it had the bad
3122 effect of slowing Exim down by computing (never used) parameters for the
3123 RSA_EXPORT functionality.
3125 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3126 authenticator to fail if there's a tab character in the incoming data
3127 (there should never be unless someone is messing about, as it's supposed
3128 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3129 if the connection is using TLS or if the remote IP is the same as the
3130 local IP, and the "valid-client-cert option" if a client certificate has
3133 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3134 authenticators. This can be used for authorization after authentication
3135 succeeds. (In the case of plaintext, it servers for both authentication
3138 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3139 if any retry times were supplied.
3141 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3142 connection, where there is no client IP address to check. In this
3143 situation, the verify now always succeeds.
3145 PH/25 Applied John Jetmore's -Mset patch.
3147 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3149 PH/27 In a string expansion for a processed (not raw) header when multiple
3150 headers of the same name were present, leading whitespace was being
3151 removed from all of them, but trailing whitespace was being removed only
3152 from the last one. Now trailing whitespace is removed from each header
3153 before concatenation. Completely empty headers in a concatenation (as
3154 before) are ignored.
3156 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3157 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3159 PH/29 [Removed. This was a change that I later backed out, and forgot to
3160 correct the ChangeLog entry (that I had efficiently created) before
3161 committing the later change.]
3163 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3164 address errors (4xx response to RCPT) over the same connection as other
3165 messages routed to the same hosts. Such deliveries are always "forced",
3166 so retry times are not inspected. This resulted in far too many retries
3167 for the affected addresses. The effect occurred only when there were more
3168 hosts than the hosts_max_try setting in the smtp transport when it had
3169 the 4xx errors. Those hosts that it had tried were not added to the list
3170 of hosts for which the message was waiting, so if all were tried, there
3171 was no problem. Two fixes have been applied:
3173 (i) If there are any address or message errors in an SMTP delivery, none
3174 of the hosts (tried or untried) are now added to the list of hosts
3175 for which the message is waiting, so the message should not be a
3176 candidate for sending over the same connection that was used for a
3177 successful delivery of some other message. This seems entirely
3178 reasonable: after all the message is NOT "waiting for some host".
3179 This is so "obvious" that I'm not sure why it wasn't done
3180 previously. Hope I haven't missed anything, but it can't do any
3181 harm, as the worst effect is to miss an optimization.
3183 (ii) If, despite (i), such a delivery is accidentally attempted, the
3184 routing retry time is respected, so at least it doesn't keep
3185 hammering the server.
3187 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3188 in ${readsocket because some servers need this prod.
3190 PH/32 Added some extra debug output when updating a wait-xxx database.
3192 PH/33 The hint "could be header name not terminated by colon", which has been
3193 given for certain expansion errors for a long time, was not being given
3194 for the ${if def:h_colon_omitted{... case.
3196 PH/34 The spec says: "With one important exception, whenever a domain list is
3197 being scanned, $domain contains the subject domain." There was at least
3198 one case where this was not true.
3200 PH/35 The error "getsockname() failed: connection reset by peer" was being
3201 written to the panic log as well as the main log, but it isn't really
3202 panic-worthy as it just means the connection died rather early on. I have
3203 removed the panic log writing for the ECONNRESET error when getsockname()
3206 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3207 runs only) independently of the message's sender address. This meant
3208 that, if the 4xx error was in fact related to the sender, a different
3209 message to the same recipient with a different sender could confuse
3210 things. In particular, this can happen when sending to a greylisting
3211 server, but other circumstances could also provoke similar problems.
3212 I have changed the default so that the retry time for these errors is now
3213 based a combination of the sender and recipient addresses. This change
3214 can be overridden by setting address_retry_include_sender=false in the
3217 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3218 remote server are returned as part of bounce messages. This was not
3219 happening for LMTP over a pipe (the lmtp transport), but now it is the
3220 same for both kinds of LMTP.
3222 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3223 in header lines that were in fact CNAMEs. This is no longer the case.
3225 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3226 and queue runs started by the daemon processed all messages. This has
3227 been fixed so that -R and -S can now usefully be given with -q<time>.
3229 PH/40 Import PCRE release 6.7 (fixes some bugs).
3231 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3233 PH/42 Give an error if -q is specified more than once.
3235 PH/43 Renamed the variables $interface_address and $interface_port as
3236 $received_ip_address and $received_port, to make it clear that these
3237 values apply to message reception, and not to the outgoing interface when
3238 a message is delivered. (The old names remain recognized, of course.)
3240 PH/44 There was no timeout on the connect() call when using a Unix domain
3241 socket in the ${readsocket expansion. There now is.
3243 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3244 be meaningful with "accept".
3246 SC/01 Eximstats V1.43
3247 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3249 SC/02 Eximstats V1.44
3250 Use a glob alias rather than an array ref in the generated
3251 parser. This improves both readability and performance.
3253 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3254 Collect SpamAssassin and rejection statistics.
3255 Don't display local sender or destination tables unless
3256 there is data to show.
3257 Added average volumes into the top table text output.
3259 SC/04 Eximstats V1.46
3260 Collect data on the number of addresses (recipients)
3261 as well as the number of messages.
3263 SC/05 Eximstats V1.47
3264 Added 'Message too big' to the list of mail rejection
3265 reasons (thanks to Marco Gaiarin).
3267 SC/06 Eximstats V1.48
3268 Mainlog lines which have GMT offsets and are too short to
3269 have a flag are now skipped.
3271 SC/07 Eximstats V1.49 (Alain Williams)
3272 Added the -emptyok flag.
3274 SC/08 Eximstats V1.50
3275 Fixes for obtaining the IP address from reject messages.
3277 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3278 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3279 whitespace changes from 4.64-PH/27
3281 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3284 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3285 are found, allow negative numbers in numeric criteria)
3287 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3289 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3290 to match changes made in 4.64-PH/43
3292 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3294 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3295 "domain" is actually an IP address, and force a failure. This locks out
3296 those revolvers/nameservers that support "A-for-A" lookups, in
3297 contravention of the specifications.
3299 PH/48 When a host name was looked up from an IP address, and the subsequent
3300 forward lookup of the name timed out, the host name was left in
3301 $sender_host_name, contrary to the specification.
3303 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3304 restricted to single-key lookups, Exim was not diagnosing an error if
3305 * or *@ was used with a query-style lookup.
3307 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3309 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3310 long ago, but noone interested enough thought of it. Let's just say that
3311 the "1.1" means that there are some new functions that weren't there at
3312 some point in the past.
3314 PH/51 Error processing for expansion failure of helo_data from an smtp
3315 transport during callout processing was broken.
3317 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3318 tested/used via the -bh/-bhc/-bs options.
3320 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3321 bug, fixed in subsequent PCRE releases).
3323 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3324 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3326 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3332 SC/01 Use a glob alias rather than an array ref in eximstats generated
3333 parser. This improves both readability and performance.
3335 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3336 Don't display local sender or destination tables in eximstats unless
3337 there is data to show.
3338 Added average volumes into the eximstats top table text output.
3340 SC/03 Collect data on the number of addresses (recipients) as well
3341 as the number of messages in eximstats.
3343 TF/01 Correct an error in the documentation for the redirect router. Exim
3344 does (usually) call initgroups() when daemonizing.
3346 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3347 with consistent privilege compared to when running as a daemon.
3349 TF/03 Note in the spec that $authenticated_id is not set for local
3350 submissions from trusted users.
3352 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3353 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3355 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3356 by adding some example configuration directives to the default
3357 configuration file. A little bit of work is required to uncomment the
3358 directives and define how usernames and passwords are checked, but
3359 there is now a framework to start from.
3361 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3362 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3363 without this. I don't know how relevant this is to other LDAP libraries.
3365 PH/02 Add the verb name to the "unknown ACL verb" error.
3367 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3369 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3371 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3372 directory not expanded when it should be if an expanded home directory
3373 was set for the address (which is overridden by the transport).
3375 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3378 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3379 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3380 because it is too late at that time, and has no effect.
3382 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3383 security issue with \' (bugzilla #107). I could not use the
3384 PQescapeStringConn() function, because it needs a PGconn value as one of
3387 PH/08 When testing addresses using -bt, indicate those final addresses that
3388 are duplicates that would not cause an additional delivery. At least one
3389 person was confused, thinking that -bt output corresponded to deliveries.
3390 (Suppressing duplicates isn't a good idea as you lose the information
3391 about possibly different redirections that led to the duplicates.)
3393 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3394 systems where poll() doesn't work, in particular OS X.
3396 PH/10 Added more information to debugging output for retry time not reached.
3398 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3399 operations in malware.c.
3401 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3404 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3405 syslog_duplication set false, log lines that would normally be written
3406 both the the main log and to the reject log were not written to syslog at
3409 PH/14 In the default configuration, change the use of "message" in ACL warn
3410 statements to "add_header".
3412 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3413 not followed by a command (e.g. "seen endif").
3415 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3416 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3419 PH/17 Added extra conditions to the default value of delay_warning_condition
3423 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3424 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3425 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3428 The Auto-Submitted: and various List- headers are standardised, whereas I
3429 don't think Precedence: ever was.
3431 PH/18 Refactored debugging code in route_finduser() to show more information,
3432 in particular, the error code if getpwnam() issues one.
3434 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3435 This is apparently needed in addition to the PH/07 change above to avoid
3436 any possible encoding problems.
3438 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3439 but not after initializing Perl.
3441 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3442 output them only if debugging. By default they are written stderr,
3443 apparently, which is not desirable.
3445 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3448 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3451 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3453 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3454 authenticated or an ident call has been made. Suppress the default
3455 values for $authenticated_id and $authenticated_sender (but permit -oMai
3456 and -oMas) when testing with -bh.
3458 PH/24 Re-jigged the order of the tests in the default configuration so that the
3459 tests for valid domains and recipients precede the DNS black list and CSA
3460 tests, on the grounds that those ones are more expensive.
3462 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3463 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3464 This bug exists in every version of Exim that I still have, right back to
3467 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3468 However, an attempt to turn on case-sensitivity in a regex key by
3469 including (?-i) didn't work because the subject string was already
3470 lowercased, and the effects were non-intuitive. It turns out that a
3471 one-line patch can be used to allow (?-i) to work as expected.
3477 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3478 other effects) broke the use of negated acl sub-conditions.
3480 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3483 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3484 "Deny" causes Exim to reject the incoming connection with a 554 error.
3485 Unfortunately, if there is a major crisis, such as a disk failure,
3486 tcp-wrappers gives "deny", whereas what one would like would be some
3487 kind of temporary error. A kludge has been added to help with this.
3488 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3489 554 error is used if errno is still zero or contains ENOENT (which occurs
3490 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3493 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3495 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3496 errors. Otherwise a message that provokes a temporary error (when other
3497 messages do not) can cause a whole host to time out.
3499 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3500 addresses were routed directly to files or pipes from a redirect router.
3501 File deliveries just didn't batch; pipe deliveries might have suffered
3504 PH/06 A failure to get a lock for a hints database would erroneously always say
3505 "Failed to get write lock", even when it was really a read lock.
3507 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3508 of 0600. This has been changed to use the value of the lockfile_mode
3509 option (which defaults to 0600).
3511 PH/08 Applied small patch from the Sieve maintainer.
3513 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3514 folder from quota calculations, a direct delivery into this folder messed
3515 up the contents of the maildirsize file. This was because the regex was
3516 used only to exclude .Trash (or whatever) when the size of the mailbox
3517 was calculated. There was no check that a delivery was happening into an
3518 excluded directory. This bug has been fixed by ignoring all quota
3519 processing for deliveries into excluded directories.
3521 PH/10 Added the maildirfolder_create_regex option to appendfile.
3527 PH/01 The code for finding all the local interface addresses on a FreeBSD
3528 system running IPv6 was broken. This may well have applied to all BSD
3529 systems, as well as to others that have similar system calls. The broken
3530 code found IPv4 interfaces correctly, but gave incorrect values for the
3531 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3532 that it would not match correctly against @[] and not recognize the IPv6
3535 PH/02 The ipliteral router was not recognizing addresses of the form user@
3536 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3538 PH/03 Added disable_ipv6.
3540 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3541 decoded form, because it is most often used to construct To: headers
3542 lines in autoreplies, and the decoded form may well be syntactically
3543 invalid. However, $reply_address has leading white space removed, and all
3544 newlines turned into spaces so that the autoreply transport does not
3547 PH/05 If group was specified without a user on a router, and no group or user
3548 was specified on a transport, the group from the router was ignored.
3550 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3551 for visible compile-time settings that can be used to change these
3552 numbers, for those that want even more. Backwards compatibility with old
3553 spool files has been maintained. However, going back to a previous Exim
3554 release will lost any variables that are in spool files.
3556 PH/07 Two small changes when running in the test harness: increase delay when
3557 passing a TCP/IP connection to a new process, in case the original
3558 process has to generate a bounce, and remove special handling of
3559 127.0.0.2 (sic), which is no longer necessary.
3561 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3562 be the same on different OS.
3564 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3567 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3568 whether --show-vars was specified or not
3570 JJ/02 exipick: Added support for new ACL variable spool format introduced
3573 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3574 syntactically invalid From: or Reply-to: line, and a filter used this to
3575 generate an autoreply, and therefore failed to obtain an address for the
3576 autoreply, Exim could try to deliver to a non-existent relative file
3577 name, causing unrelated and misleading errors. What now happens is that
3578 it logs this as a hard delivery error, but does not attempt to create a
3581 PH/11 The exinext utility has a -C option for testing purposes, but although
3582 the given file was scanned by exinext itself; it wasn't being passed on
3583 when Exim was called.
3585 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3586 an end-of-file indication when reading a command response.
3588 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3589 compiled. In many other places in Exim, IPv6 addresses are always
3590 recognized, so I have changed this. It also means that IPv4 domain
3591 literals of the form [IPV4:n.n.n.n] are now always recognized.
3593 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3594 used if the router is not running as root, for example, when verifying at
3595 ACL time, or when using -bh. The debugging output from this situation was
3596 non-existent - all you got was a failure to exec. I have made two
3599 (a) Failures to set uid/gid, the current directory, or a process leader
3600 in a subprocess such as that created by queryprogram now generate
3601 suitable debugging output when -d is set.
3603 (b) The queryprogram router detects when it is not running as root,
3604 outputs suitable debugging information if -d is set, and then runs
3605 the subprocess without attempting to change uid/gid.
3607 PH/15 Minor change to Makefile for building test_host (undocumented testing
3610 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3611 additional section of a DNS packet that returns MX or SRV records.
3612 Instead, it always explicitly searches for A/AAAA records. This avoids
3613 major problems that occur when a DNS server includes only records of one
3614 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3615 fixed another bug: if SRV records were looked up and the corresponding
3616 address records were *not* found in the additional section, the port
3617 values from the SRV records were lost.
3619 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3620 using the correct key (the original address) when searching the retry
3621 rules in order to find which one to use for generating the retry hint.
3623 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3624 adding the default one. Similarly, if it contains a Reply-To: header, the
3625 errors_reply_to option, if set, is not used.
3627 PH/19 When calculating a retry time, Exim used to measure the "time since
3628 failure" by looking at the "first failed" field in the retry record. Now
3629 it does not use this if it is later than than the arrival time of the
3630 message. Instead it uses the arrival time. This makes for better
3631 behaviour in cases where some deliveries succeed, thus re-setting the
3632 "first failed" field. An example is a quota failure for a huge message
3633 when small messages continue to be delivered. Without this change, the
3634 "time since failure" will always be short, possible causing more frequent
3635 delivery attempts for the huge message than are intended.
3636 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3638 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3639 $1, $2, $3) because the numerical variables can be reset during some
3640 expansion items (e.g. "match"), thereby losing the authentication data.
3642 PH/21 Make -bV show the size of off_t variables so that the test suite can
3643 decide whether to run tests for quotas > 2G.
3645 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3646 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3647 filecount value is greater than 2G or if a quota value is greater than 2G
3648 on a system where the size of off_t is not greater than 4, a panic error
3651 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3652 never match. The debug and -bh output now contains an explicit error
3653 message indicating a malformed IPv4 address or mask.
3655 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3656 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3657 PH/23 above applies.
3659 PH/25 Do not write to syslog when running in the test harness. The only
3660 occasion when this arises is a failure to open the main or panic logs
3661 (for which there is an explicit test).
3663 PH/26 Added the /no_tell option to "control=freeze".
3665 PH/27 If a host name lookup failed very early in a connection, for example, if
3666 the IP address matched host_lookup and the reverse lookup yielded a name
3667 that did not have a forward lookup, an error message of the form "no IP
3668 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3669 could be logged. Now it outputs the IP address instead of "NULL".
3671 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3672 allows the sender and the authenticated sender to be set when
3673 submitting a message from within Exim. Since child_open_exim() is
3674 documented for local_scan(), the new function should be too.
3676 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3677 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3678 results in an empty string is now treated as unset.
3680 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3682 PH/31 Added sender_verify_fail logging option.
3684 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3685 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3686 tidied the source and removed it altogether.
3688 PH/33 When a queue run was abandoned because the load average was too high, a
3689 log line was always written; now it is written only if the queue_run log
3690 selector is set. In addition, the log line for abandonment now contains
3691 information about the queue run such as the pid. This is always present
3692 in "start" and "stop" lines but was omitted from the "abandon" line.
3694 PH/34 Omit spaces between a header name and the colon in the error message that
3695 is given when verify = headers_syntax fails (if there are lots of them,
3696 the message gets confusing).
3698 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3699 names, as there are now some PTR records that contain slashes. This check
3700 is only to protect against broken name servers that fall over on strange
3701 characters, so the fact that it applies to all lookups doesn't matter.
3703 PH/36 Now that the new test suite is complete, we can remove some of the
3704 special code in Exim that was needed for the old test suite. For example,
3705 sorting DNS records because real resolvers return them in an arbitrary
3706 order. The new test suite's fake resolver always returns records in the
3709 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3710 bounces) except when queue_only is set, to avoid logging races between
3711 the different processes.
3713 PH/38 Panic-die if .include specifies a non-absolute path.
3715 PH/39 A tweak to the "H" retry rule from its user.
3717 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3718 a label. They prevented compilation on older perls.
3720 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3721 a warning to be raised on newish perls.
3723 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3724 on queue. Changes to match documented behaviour of showing count of
3725 messages matching specified criteria.
3727 PH/40 Changed the default ident timeout from 30s to 5s.
3729 PH/41 Added support for the use of login_cap features, on those BSD systems
3730 that have them, for controlling the resources used by pipe deliveries.
3732 PH/42 The content-scanning code uses fopen() to create files in which to put
3733 message data. Previously it was not paying any attention to the mode of
3734 the files. Exim runs with umask(0) because the rest of the code creates
3735 files with open(), and sets the required mode explicitly. Thus, these
3736 files were ending up world-writeable. This was not a big issue, because,
3737 being within the spool directory, they were not world-accessible. I have
3738 created a function called modefopen, which takes an additional mode
3739 argument. It sets umask(777), creates the file, chmods it to the required
3740 mode, then resets the umask. All the relevant calls to fopen() in the
3741 content scanning code have been changed to use this function.
3743 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3744 to 24 hours. This avoids potential overflow problems when processing G
3745 and H retry rules. I suspect nobody ever tinkers with this value.
3747 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3749 PH/45 When the plaintext authenticator is running as a client, the server's
3750 challenges are checked to ensure they are valid base64 strings. By
3751 default, the authentication attempt is cancelled if an invalid string is
3752 received. Setting client_ignore_invalid_base64 true ignores these errors.
3753 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3754 they are received. Thus, the responses can be made to depend on the
3755 challenges. If an invalid string is ignored, an empty string is placed in
3758 PH/46 Messages that are created by the autoreply transport now contains a
3759 References: header, in accordance with RFCs 2822 and 3834.
3761 PH/47 Added authenticated_sender_force to the smtp transport.
3763 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3765 PH/49 Installed latest patch from the Sieve maintainer.
3767 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3768 was also set, the appendfile transport was unnecessarily scanning a
3769 directory of message files (e.g. for maildir delivery) to find the count
3770 of files (along with the size), even though it did not need this
3771 information. It now does the scan only if it needs to find either the
3772 size of the count of files.
3774 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3776 PH/52 Two bugs concerned with error handling when the smtp transport is
3779 (i) Exim was not creating retry information for temporary errors given
3780 for individual recipients after the DATA command when the smtp transport
3781 was used in LMTP mode. This meant that they could be retried too
3782 frequently, and not timed out correctly.
3784 (ii) Exim was setting the flag that allows error details to be returned
3785 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3786 recipients that were returned after the DATA command.
3788 PH/53 This is related to PH/52, but is more general: for any failing address,
3789 when detailed error information was permitted to be returned to the
3790 sender, but the error was temporary, then after the final timeout, only
3791 "retry timeout exceeded" was returned. Now it returns the full error as
3792 well as "retry timeout exceeded".
3794 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3795 do this, and (what is worse) MTAs that accept it.
3797 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3798 will now be deprecated.
3800 PH/56 New os.c-cygwin from the Cygwin maintainer.
3802 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3803 formats (previously only available in exim formats via -bpr, -bpru,
3804 and -bpra. Now also available in native and exiqgrep formats)
3806 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3807 with very large, slow to parse queues
3809 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3811 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3813 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3814 responses to authentication challenges, though it was showing the
3815 challenges; (ii) I've removed the CR characters from the debug output for
3818 PH/58 Allow for the insertion of a newline as well as a space when a string
3819 is turned into more than one encoded-word during RFC 2047 encoding. The
3820 Sieve code now uses this.
3822 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3823 data_4xx, lost_connection, tls_required.
3825 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3826 message was being sent as an SMTP response.
3828 PH/61 Add -l and -k options to exicyclog.
3830 PH/62 When verifying, if an address was redirected to one new address, so that
3831 verification continued, and the new address failed or deferred after
3832 having set something in $address_data, the value of $address_data was not
3833 passed back to the ACL. This was different to the case when no
3834 redirection occurred. The value is now passed back in both cases.
3836 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3837 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3838 use login_cap.h, so on its own it isn't the distinguishing feature. The
3839 new name refers directly to the setclassresources() function.
3841 PH/65 Added configuration files for NetBSD3.
3843 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3845 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3846 is preferred over IPv4.
3848 PH/68 The bounce_return_message and bounce_return_body options were not being
3849 honoured for bounces generated during the reception of non-SMTP messages.
3850 In particular, this applied to messages rejected by the ACL. This bug has
3851 been fixed. However, if bounce_return_message is true and bounce_return_
3852 body is false, the headers that are returned for a non-SMTP message
3853 include only those that have been read before the error was detected.
3854 (In the case of an ACL rejection, they have all been read.)
3856 PH/69 The HTML version of the specification is now built in a directory called
3857 spec_html instead of spec.html, because the latter looks like a path with
3858 a MIME-type, and this confuses some software.
3860 PH/70 Catch two compiler warnings in sieve.c.
3862 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3863 function verify_get_ident() calls ip_connect() to connect a socket, but
3864 if the "connect()" function timed out, ip_connect() used to close the
3865 socket. However, verify_get_ident() also closes the socket later, and in
3866 between Exim writes to the log, which may get opened at this point. When
3867 the socket was closed in ip_connect(), the log could get the same file
3868 descriptor number as the socket. This naturally causes chaos. The fix is
3869 not to close the socket in ip_connect(); the socket should be closed by
3870 the function that creates it. There was only one place in the code where
3871 this was missing, in the iplookup router, which I don't think anybody now
3872 uses, but I've fixed it anyway.
3874 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3875 well as to direct DNS lookups. Otherwise the handling of names in host
3876 lists is inconsistent and therefore confusing.
3882 PH/01 Two changes to the default runtime configuration:
3884 (1) Move the checks for relay_from_hosts and authenticated clients from
3885 after to before the (commented out) DNS black list checks.
3887 (2) Add control=submission to the relay_from_hosts and authenticated
3888 clients checks, on the grounds that messages accepted by these
3889 statements are most likely to be submissions.
3891 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3893 (1) Generate an error if the third argument for the ${prvs expansion is
3896 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3899 (3) Reset the variables that are obtained from the first argument of
3900 ${prvscheck and used in the second argument before leaving the code,
3901 because their memory is reclaimed, so using them afterwards may do
3904 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3905 one (it's much easier than Tom thought :-).
3907 (5) Because of (4), we can now allow for the use of $prvscheck_result
3908 inside the third argument.
3910 PH/03 For some reason, the default setting of PATH when running a command from
3911 a pipe transport was just "/usr/bin". I have changed it to
3914 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3915 anything to be listed in the output from -bV.
3917 PH/05 When a filter generated an autoreply, the entire To: header line was
3918 quoted in the delivery log line, like this:
3920 => >A.N.Other <ano@some.domain> <original@ddress> ...
3922 This has been changed so that it extracts the operative address. There
3923 may be more than one such address. If so, they are comma-separated, like
3926 => >ano@some.domain,ona@other.domain <original@ddress> ...
3928 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3929 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3930 not being looked up in the rDNS to get a host name, Exim was showing the
3931 IP address twice in Received: lines, even though the IP addresses were
3932 identical. For example:
3934 Received: from [1.2.3.4] (helo=[1.2.3.4])
3936 However, if the real host name was known, it was omitting the HELO data
3937 if it matched the actual IP address. This has been tidied up so that it
3938 doesn't show the same IP address twice.
3940 PH/07 When both +timestamp and +memory debugging was on, the value given by
3941 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3942 called by the debug printing, thereby overwriting the timestamp buffer.
3943 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3945 PH/08 When the original message was included in an autoreply transport, it
3946 always said "this is a copy of the message, including all the headers",
3947 even if body_only or headers_only was set. It now gives an appropriate
3950 PH/09 Applied a patch from the Sieve maintainer which:
3952 o fixes some comments
3953 o adds the (disabled) notify extension core
3954 o adds some debug output for the result of if/elsif tests
3955 o points to the current vacation draft in the documentation
3956 and documents the missing references header update
3960 o fixes a bug in processing the envelope test (when testing
3961 multiple envelope elements, the last element determined the
3964 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3965 Electronic Mail") by including:
3967 Auto-submitted: auto-generated
3969 in the messages that it generates (bounce messages and others, such as
3970 warnings). In the case of bounce messages for non-SMTP messages, there was
3971 also a typo: it was using "Auto_submitted" (underscore instead of
3972 hyphen). Since every message generated by Exim is necessarily in response
3973 to another message, thes have all been changed to:
3975 Auto-Submitted: auto-replied
3977 in accordance with these statements in the RFC:
3979 The auto-replied keyword:
3981 - SHOULD be used on messages sent in direct response to another
3982 message by an automatic process,
3984 - MUST NOT be used on manually-generated messages,
3986 - MAY be used on Delivery Status Notifications (DSNs) and Message
3987 Disposition Notifications (MDNs),
3989 - MUST NOT be used on messages generated by automatic or periodic
3990 processes, except for messages which are automatic responses to
3993 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3994 to the default Received: header definition.
3996 PH/12 Added log selector acl_warn_skipped (default on).
3998 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3999 variables because (a) they are in the wrong storage pool and (b) even if
4000 they were copied, it wouldn't work properly because of the caching.
4002 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4003 checking when decoding. Apparently there are clients that generate
4004 overlong encoded strings. Why am I not surprised?
4006 PH/15 If the first argument of "${if match_address" was not empty, but did not
4007 contain an "@" character, Exim crashed. Now it writes a panic log message
4008 and treats the condition as false.
4010 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4012 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4013 extension "envelope-auth". The code is finished and in agreement with
4014 other implementations, but there is no documentation so far and in fact,
4015 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4016 not changing the active code.
4018 Print executed "if" and "elsif" statements when debugging is used. This
4019 helps a great deal to understand what a filter does.
4021 Document more things not specified clearly in RFC3028. I had all this
4022 sorted out, when out of a sudden new issues came to my mind. Oops."
4024 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4027 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4028 canonical form (as documented). However, after a host name lookup from
4029 the IP address, check_host() was doing a simple string comparison with
4030 addresses acquired from the DNS when checking that the found name did
4031 have the original IP as one of its addresses. Since any found IPv6
4032 addresses are likely to be in abbreviated form, the comparison could
4033 fail. Luckily, there already exists a function for doing the comparison
4034 by converting both addresses to binary, so now that is used instead of
4035 the text comparison.
4037 PH/20 There was another similar case to PH/19, when a complete host name was
4038 given in a host list; looking up its IP address could give an abbreviated
4039 form, whereas the current host's name might or might not be abbreviated.
4040 The same fix has been applied.
4046 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4047 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4050 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4051 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4053 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4055 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4056 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4057 Also, for "Auto-Submitted", treat anything other than "no" as
4058 non-personal, in accordance with RFC 3834. (Previously it treated
4059 anything starting "auto-" as non-personal.)
4061 TF/01 The control=submission/name=... option had a problem with syntax
4062 errors if the name included a slash character. The /name= option
4063 now slurps the rest of the string, so it can include any characters
4064 but it must come last in the list of options (after /sender_retain
4067 PH/05 Some modifications to the interface to the fake nameserver for the new
4075 TK/01 Added the "success_on_redirect" address verification option. See
4076 NewStuff for rationale and an example.
4078 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4080 PH/02 Patch to exigrep to allow it to work on syslog lines.
4082 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4083 fread() to skip over the body file's header line, because in Cygwin the
4084 header line is locked and is inaccessible.
4086 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4087 co-exist for some time) to make it clear that it is the Exim ID that is
4088 referenced, not the Message-ID: header line.
4090 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4091 string_format() function, because snprintf() does not exist on all
4094 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4095 ${stat: expansion item.
4097 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4098 protocol synchronization error", to keep the pedants happy.
4100 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4101 well as for IRIX systems, when gcc is being used. See the host.c source
4104 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4106 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4109 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4110 transport and to the smtp transport in LMTP mode.
4112 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4114 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4115 run a filter in a subprocess. This could lead to confusion in subsequent
4116 lookups in the parent process. There should also be a search_tidyup() at
4117 the end of the subprocess.
4119 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4120 only if the host matched helo_try_verify_hosts, which caused the
4121 verification to occur when the EHLO/HELO command was issued. The ACL just
4122 tested the remembered result. Now, if a previous verification attempt has
4123 not happened, "verify = helo" does it there and then.
4125 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4127 TK/03 Fix log output including CR from clamd.
4129 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4130 exist provoked a memory error which could cause a segfault.
4132 PH/15 Installed PCRE 6.2
4134 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4136 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4137 of the problem. Specifically, suggested +O2 rather than +O1 for the
4140 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4142 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4143 record, the port was not correctly logged when the outgoing_port log
4144 selector was set (it logged the transort's default port).
4146 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4147 fallback_hosts, and "hosts" in the smtp transport.
4149 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4150 host errors such as "Connection refused".
4152 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4153 authentication with radiusclient 0.4.9:
4155 - Error returned from rc_read_config was caught wrongly
4156 - Username/password not passed on to radius server due to wrong length.
4158 The presumption is that some radiusclient API changes for 4.51/PH/17
4159 were not taken care of correctly. The code is still untested by me (my
4160 Linux distribution still has 0.3.2 of radiusclient), but it was
4161 contributed by a Radius user.
4163 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4164 expanding the "port" option of the smtp transport.
4166 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4167 while reading a MIME header. Thanks to Tom Hughes for a patch.
4169 PH/24 Include config.h inside local_scan.h so that configuration settings are
4172 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4173 that in an ACL for RCPT (for example), you can examine exactly what was
4176 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4177 commands, but it was not correctly comparing the address with the actual
4178 client host address. Thus, it would show the EHLO address in Received:
4179 header lines when this was not necessary.
4181 PH/27 Added the % operator to ${eval:}.
4183 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4184 it should be ignoring failures (because with -C, for example, it has lost
4185 privilege). It wasn't ignoring creation failures other than "already
4188 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4191 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4192 because an input line was too long, either on its own, or by virtue of
4193 too many continuations, the temporary file was not being removed, and the
4194 return code was incorrect.
4196 PH/31 Missing "BOOL" in function definition in filtertest.c.
4198 PH/32 Applied Sieve patches from the maintainer.
4200 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4202 PH/33 Added "verify = not_blind".
4204 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4205 Local/Makefile (with some defaults set). These are used in built scripts
4206 such as exicyclog, but they have never been used in the exim_install
4207 script (though there are many overriding facilities there). I have
4208 arranged that the exim_install script now takes note of these two
4211 PH/35 Installed configuration files for Dragonfly.
4213 PH/36 When a locally submitted message by a trusted user did not contain a
4214 From: header, and the sender address was obtained from -f or from an SMTP
4215 MAIL command, and the trusted user did not use -F to supply a sender
4216 name, $originator_name was incorrectly used when constructing a From:
4217 header. Furthermore, $originator_name was used for submission mode
4218 messages from external hosts without From: headers in a similar way,
4219 which is clearly wrong.
4221 PH/37 Added control=suppress_local_fixups.
4223 PH/38 When log_selector = +received_sender was set, and the addition of the
4224 sender made the log line's construction buffer exactly full, or one byte
4225 less than full, an overflow happened when the terminating "\n" was
4228 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4229 when the result of a list match is failure because a DNS lookup failed.
4231 PH/40 RM_COMMAND is now used in the building process.
4233 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4234 the "build-* directories that it finds.
4236 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4237 address in a domain literal was a prefix of an interface address.
4239 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4240 when verifying a sender address, unless rewrite_headers is false.
4242 PH/44 Wrote a long comment about why errors_to addresses are verified as
4243 recipients, not senders.
4245 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4246 the ratelimit ACL was added.
4248 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4250 PH/46 Added extra information about PostgreSQL errors to the error string.
4252 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4253 avoiding the need to install special zones in a real server. This is
4254 backwards compatible; if it can't find the fake resolver, it drops back.
4255 Thus, both old and new test suites can be run.
4257 TF/02 Added util/ratelimit.pl
4259 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4260 clock is set back in time.
4262 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4263 Candler <B.Candler@pobox.com>.
4265 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4266 OK for addresses that are the result of redirections.
4268 PH/48 A number of further additions for the benefit of the new test suite,
4269 including a fake gethostbyname() that interfaces to the fake DNS resolver
4272 TF/06 The fix for widen_domains has also been applied to qualify_single and
4273 search_parents which are the other dnslookup options that can cause
4276 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4279 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4281 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4282 service" if it encountered an MX record with an empty target hostname.
4283 The message is now "an MX or SRV record indicated no SMTP service".
4285 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4286 if the DNS of the sending site is misconfigured. This is quite a
4287 common situation. This change restores the behaviour of treating a
4288 helo verification defer as a failure.
4290 PH/51 If self=fail was set on a router, the bounce message did not include the
4291 actual error message.
4297 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4299 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4300 command itself ended in error, the underlying message about the transport
4301 filter timeout was being overwritten with the pipe command error. Now the
4302 underlying error message should be appended to the second error message.
4304 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4306 PH/02 Reduce the amount of output that "make" produces by default. Full output
4307 can still be requested.
4309 PH/03 The warning log line about a condition test deferring for a "warn" verb
4310 was being output only once per connection, rather than after each
4311 occurrence (because it was using the same function as for successful
4312 "warn" verbs). This seems wrong, so I have changed it.
4314 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4315 it should not have, which might have caused a crash in the right
4316 circumstances, but probably never did.
4318 PH/04 Installed a modified version of Tony Finch's patch to make submission
4319 mode fix the return path as well as the Sender: header line, and to
4320 add a /name= option so that you can make the user's friendly name appear
4323 TF/03 Added the control = fakedefer ACL modifier.
4325 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4326 Mark Lowes for thorough testing.
4328 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4330 TK/03 Merged latest SRS patch from Miles Wilton.
4332 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4333 with the definition in sysexits.h (which is #included earlier).
4334 Fortunately, Exim does not actually use EX_OK. The code used to try to
4335 preserve the sysexits.h value, by assuming that macro definitions were
4336 scanned for macro replacements. I have been disabused of this notion,
4337 so now the code just undefines EX_OK before #including unistd.h.
4339 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4340 in the smtp transport. When a block could not be written in a single
4341 write() function, the timeout was being re-applied to each part-write.
4342 This seems wrong - if the receiver was accepting one byte at a time it
4343 would take for ever. The timeout is now adjusted when this happens. It
4344 doesn't have to be particularly precise.
4346 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4347 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4349 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4350 without a domain if the check to <postmaster@domain> fails.
4352 SC/01 Eximstats: added -xls and the ability to specify output files
4353 (patch written by Frank Heydlauf).
4355 SC/02 Eximstats: use FileHandles for outputting results.
4357 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4359 SC/04 Eximstats: fixed display of large numbers with -nvr option
4361 SC/05 Eximstats: fixed merging of reports with empty tables.
4363 SC/06 Eximstats: added the -include_original_destination flag
4365 SC/07 Eximstats: removed tabs and trailing whitespace.
4367 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4369 TK/06 MBOX spool code: Add real "From " MBOX separator line
4370 so the .eml file is really in mbox format (even though
4371 most programs do not really care). Patch from Alex Miller.
4373 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4374 The latter is generated from $received_to and is only set if the
4375 message has one envelope recipient. SA can use these headers,
4376 obviously out-of-the-box. Patch from Alex Miller.
4378 PH/08 The ${def test on a variable was returning false if the variable's
4379 value was "0", contrary to what the specification has always said!
4380 The result should be true unless the variable is empty.
4382 PH/09 The syntax error of a character other than { following "${if
4383 def:variable_name" (after optional whitespace) was not being diagnosed.
4384 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4385 accidental colon was present, for example, could give incorrect results.
4387 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4388 result is used (not including appendfile, where other changes are about
4391 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4392 This involved changing a lot of size variables from int to off_t. It
4393 should work with maildirs and everything.
4395 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4396 spamd dying while we are connected to it.
4398 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4401 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4402 function for BDB 4.3.
4404 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4406 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4407 the sources for PCRE have been re-arranged and more files are now
4410 PH/15 The code I had for printing potentially long long variables in PH/11
4411 above was not the best (it lost precision). The length of off_t variables
4412 is now inspected at build time, and an appropriate printing format (%ld
4413 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4414 to be "long long int" or "long int". This is needed for the internal
4415 formatting function string_vformat().
4417 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4418 the configuration file to be ":syslog", then the script "guesses" where
4419 the logs files are, rather than using the compiled in default. In our
4420 case the guess is not the same as the compiled default, so the script
4421 suddenly stopped working when I started to use syslog. The patch checks
4422 to see if log_file_path is "". If so, it attempts to read it from exim
4423 with no configuration file to get the compiled in version, before it
4424 falls back to the previous guessing code."
4426 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4427 implementing BATV in an Exim configuration. See NewStuff for the gory
4430 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4431 Makefile that are specific to HP-UX.
4433 PH/18 If the "use_postmaster" option was set for a recipient callout together
4434 with the "random" option, the postmaster address was used as the MAIL
4435 FROM address for the random test, but not for the subsequent recipient
4436 test. It is now used for both.
4438 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4439 patch removes a few documentation additions to RFC 3028, because the
4440 latest draft now contains them. It adds the new en;ascii-case comparator
4441 and a new error check for 8bit text in MIME parts. Comparator and
4442 require names are now matched exactly. I enabled the subaddress
4443 extension, but it is not well tested yet (read: it works for me)."
4445 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4446 rework some of the code of TK/09 above to avoid the hardwired use of
4447 "%lld" and "long long". Replaced the call to snprintf() with a call to
4450 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4451 records point to non-existent hosts", "retry timeout exceeded", and
4452 "retry time not reached for any host after a long failure period".
4454 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4455 experimental DomainKeys support:
4457 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4458 (2) On an error such as an illegally used "control", the wrong name for
4459 the control was given.
4461 These problems did NOT occur unless DomainKeys support was compiled.
4463 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4465 PH/24 Added ${if match_ip condition.
4467 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4468 databases so that it will be absolutely obvious if a crash occurs in the
4469 DB library. This is a regular occurrence (often caused by mis-matched
4472 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4473 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4474 picked up on a user's system that detects such things. There doesn't seem
4475 to be a gcc warning option for this - only an attribute that has to be
4476 put on the function's prototype. It seems that in Fedora Core 4 they have
4477 set this on a number of new functions. No doubt there will be more in due
4480 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4481 specify a transport. However, if an address that was verified by such a
4482 router was the subject of a callout, Exim crashed because it tried to
4483 read the rcpt_include_affixes from the non-existent transport. Now it
4484 just assumes that the setting of that option is false. This bug was
4485 introduced by 4.51/PH/31.
4487 PH/28 Changed -d+all to exclude +memory, because that information is very
4488 rarely of interest, but it makes the output a lot bigger. People tend to
4489 do -d+all out of habit.
4491 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4492 code in os-type was giving problems when libc.so lives in lib64, like on
4495 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4496 aren't the modern standard, and it seems that some systems' include files
4497 don't always have them. Exim was already checking for some of the newer
4498 ones like T_AAAA, and defining it itself. I've added checks for all the
4499 record types that Exim uses.
4501 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4502 not automatically generating a new one, as it is supposed to. This
4503 prevented TLS from working. If the file did exist, but contained invalid
4504 data, a new version was generated, as expected. It was only the case of a
4505 non-existent file that was broken.
4507 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4508 with a change in libdomainkeys > 0.64.
4510 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4511 from DNS. If the selector record carries the flag, it now has
4512 precedence over the domain-wide flag.
4514 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4516 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4517 the use of a port name that isn't defined in /etc/services) occurred, the
4518 message was deferred as in a normal delivery, and thus remained on the
4519 spool, instead of being failed because of the mua_wrapper setting. This
4520 is now fixed, and I tidied up some of the mua_wrapper messages at the
4523 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4524 the messages in a hash of arrays rather than using individual hashes.
4525 This is a bit cleaner and results in dramatic memory savings, albeit
4526 at a slight CPU cost.
4528 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4529 as requested by Marc Sherman.
4531 SC/10 Eximstats: added histograms for user specified patterns as requested
4534 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4536 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4537 fopen() in the content-scanning modules that did not already have it.
4543 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4544 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4546 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4548 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4550 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4551 to test Sieve filters that use "vacation".
4553 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4554 that changes the way the GnuTLS parameters are stored in the cache file.
4555 The new format can be generated externally. For backward compatibility,
4556 if the data in the cache doesn't make sense, Exim assumes it has read an
4557 old-format file, and it generates new data and writes a new file. This
4558 means that you can't go back to an older release without removing the
4561 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4562 work if there are any delivery delays because "one_time" forces the
4563 parent to be marked "delivered", so its unseen clone is never tried
4564 again. For this reason, Exim now forbids the simultaneous setting of
4567 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4568 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4569 entry if you want to know the details. The fix, however, neglected to
4570 consider the case when local delivery batching is involved. The test for
4571 "previously delivered" was not happening when checking to see if an
4572 address could be batched with a previous (undelivered) one; under
4573 certain circumstances this could lead to multiple deliveries to the same
4576 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4577 in its include files, and this causes problems building Exim.
4579 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4580 header_syntax) but Exim was just ignoring anything given after a slash.
4581 In particular, this caused confusion with an attempt to use "verify =
4582 reverse_host_lookup/defer_ok". An error is now given when options are
4583 supplied for verify items that do not have them. (Maybe reverse_host_
4584 lookup should have a defer_ok option, but that's a different point.)
4586 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4587 defined by RFC 821) to 2048, because there were problems with some AUTH
4588 commands, and RFC 1869 says the size should be increased for extended
4589 SMTP commands that take arguments.
4591 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4594 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4595 "unknown" error; now it says that the functionality isn't in the binary.
4597 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4598 an address' error message when a string expansion fails (syntax or
4599 whatever). Otherwise the password may appear in the log. Following change
4600 PH/42 below, there is no longer a chance of it appearing in a bounce
4603 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4605 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4606 of its addresses was ever tried. (Bugzilla bug #2.)
4608 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4609 the result incorrectly in the debug output. (It correctly added a newline
4610 to what was transported.)
4612 TF/01 Added $received_time.
4614 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4615 commented out examples of how to interface to a virus scanner and to
4616 SpamAssassin. Also added commented examples of av_scanner and
4617 spamd_address settings.
4619 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4620 and controls are allowed in which ACLs. There were a couple of minor
4621 errors. Some of the entries in the conditions table (which is a table of
4622 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4623 negation of where the condition IS allowed.
4625 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4627 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4628 header file does not have a version number, so I've had to invent a new
4629 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4630 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4631 radiusclient), but it was contributed by a Radius user.
4633 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4634 files or directories, for OpenSSL.
4636 PH/19 When an Exim process that is running as root has to create an Exim log
4637 file, it does so in a subprocess that runs as exim:exim so as to get the
4638 ownership right at creation (otherwise, other Exim processes might see
4639 the file with the wrong ownership). There was no test for failure of this
4640 fork() call, which would lead to the process getting stuck as it waited
4641 for a non-existent subprocess. Forks do occasionally fail when resources
4642 run out. I reviewed all the other calls to fork(); they all seem to check
4645 PH/20 When checking for unexpected SMTP input at connect time (before writing
4646 the banner), Exim was not dealing correctly with a non-positive return
4647 from the read() function. If the client had disconnected by this time,
4648 the result was a log entry for a synchronization error with an empty
4649 string after "input=" when read() returned zero. If read() returned -1
4650 (an event I could not check), uninitialized data bytes were printed.
4651 There were reports of junk text (parts of files, etc) appearing after
4654 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4656 PH/22 Added support for macro redefinition, and (re)definition in between
4657 driver and ACL definitions.
4659 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4660 forgetting to use the resulting value; it was using the unexpanded value.
4662 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4663 hadn't been configured. The fix is from Juergen Kreileder, who
4664 understands it better than I do:
4666 "Here's what I see happening with three configured cyrus_sasl
4667 authenticators configured (plain, login, cram-md5):
4669 On startup auth_cyrus_sasl_init() gets called for each of these.
4670 This means three calls to sasl_listmech() without a specified mech_list.
4671 => SASL tests which mechs of all available mechs actually work
4672 => three warnings about OTP not working
4673 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4675 With the patch, sasl_listmech() also gets called three times. But now
4676 SASL's mech_list option is set to the server_mech specified in the the
4677 authenticator. Or in other words, the answer from sasl_listmech()
4678 gets limited to just the mech you're testing for (which is different
4680 => the return list contains just 'plain' or 'login', 'cram-md5' or
4681 nothing depending on the value of ob->server_mech.
4683 I've just tested the patch: Authentication still works fine,
4684 unavailable mechs specified in the exim configuration are still
4685 caught, and the auth.log warnings about OTP are gone."
4687 PH/25 When debugging is enabled, the contents of the command line are added
4688 to the debugging output, even when log_selector=+arguments is not
4691 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4692 answer is "GNU", and only if the return is "GNU/something" is the answer
4695 PH/27 $acl_verify_message is now set immediately after the failure of a
4696 verification in an ACL, and so is available in subsequent modifiers. In
4697 particular, the message can be preserved by coding like this:
4699 warn !verify = sender
4700 set acl_m0 = $acl_verify_message
4702 Previously, $acl_verify_message was set only while expanding "message"
4703 and "log_message" when a very denied access.
4705 PH/28 Modified OS/os.c-Linux with
4707 -#ifndef OS_LOAD_AVERAGE
4708 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4710 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4711 nomenclature these days.)
4713 PH/29 Installed patch from the Sieve maintainer that adds the options
4714 sieve_useraddress and sieve_subaddress to the redirect router.
4716 PH/30 In these circumstances:
4717 . Two addresses routed to the same list of hosts;
4718 . First host does not offer TLS;
4719 . First host accepts first address;
4720 . First host gives temporary error to second address;
4721 . Second host offers TLS and a TLS session is established;
4722 . Second host accepts second address.
4723 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4724 and peerdn, if requested) that were in fact used only for the second
4727 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4728 attention to any local part prefix or suffix that was matched by the
4729 router that accepted the address. It now behaves in the same way as it
4730 does for delivery: the affixes are removed from the local part unless
4731 rcpt_include_affixes is set on the transport.
4733 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4734 timeout during the DATA phase of an incoming message.
4736 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4737 applied a patch sanctioned by the Sieve maintainer.
4739 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4740 the uid or gid is negative. A case of a negative gid caused this to be
4741 noticed. The fix allows for either to be negative.
4743 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4744 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4747 PH/36 The change PH/12 above was broken. Fixed it.
4749 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4750 the grounds that routing the same address twice would always produce the
4751 same answer. This might have been true once, but it is certainly no
4752 longer true now. Routing a child address may depend on the previous
4753 routing that produced that child. Some complicated redirection strategies
4754 went wrong when messages had multiple recipients, and made Exim's
4755 behaviour dependent on the order in which the addresses were given.
4757 I have moved the duplicate checking until after the routing is complete.
4758 Exim scans the addresses that are assigned to local and remote
4759 transports, and removes any duplicates. This means that more work will be
4760 done, as duplicates will always all be routed, but duplicates are
4761 presumably rare, so I don't expect this is of any significance.
4763 For deliveries to pipes, files, and autoreplies, the duplicate checking
4764 still happens during the routing process, since they are not going to be
4767 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4768 It corrects a timeout issue with spamd. This is Ian's comment: "The
4769 background is that sometimes spamd either never reads data from a
4770 connection it has accepted, or it never writes response data. The exiscan
4771 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4772 blindly assumes that writes won't block so it may never time out."
4774 PH/39 Allow G after quota size as well as K and M.
4776 PH/40 The value set for $authenticated_id in an authenticator may not contain
4777 binary zeroes or newlines because the value is written to log lines and
4778 to spool files. There was no check on this. Now the value is run through
4779 the string_printing() function so that such characters are converted to
4780 printable escape sequences.
4782 PH/41 $message_linecount is a new variable that contains the total number of
4783 lines in the message. Compare $body_linecount, which is the count for the
4786 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4787 bounce and delay warning messages, except in certain special cases, which
4790 (a) An SMTP error message from a remote host;
4791 (b) A message specified in a :fail: redirection;
4792 (c) A message specified in a "fail" command in a system filter;
4793 (d) A message specified in a FAIL return from the queryprogram router;
4794 (e) A message specified by the cannot_route_message router option.
4796 In these cases only, Exim does include the error details in bounce and
4797 warning messages. There are also a few cases where bland messages such
4798 as "unrouteable address" or "local delivery error" are given.
4800 PH/43 $value is now also set for the "else" part of a ${run expansion.
4802 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4803 being worked on, but at least Exim now implements the latest version to
4806 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4807 process to complete was treated as a delivery failure, a timeout while
4808 writing the message to the pipe was logged, but erroneously treated as a
4809 successful delivery. Such timeouts include transport filter timeouts. For
4810 consistency with the overall process timeout, these timeouts are now
4811 treated as errors, giving rise to delivery failures by default. However,
4812 there is now a new Boolean option for the pipe transport called
4813 timeout_defer, which, if set TRUE, converts the failures into defers for
4814 both kinds of timeout. A transport filter timeout is now identified in
4817 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4818 systems where "make" and "gmake" are different, calling "gmake" at top
4819 level broke things. I've arranged for the value of $(MAKE) to be passed
4820 from the Makefile to this script so that it can call the same version of
4824 A note about Exim versions 4.44 and 4.50
4825 ----------------------------------------
4827 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4828 changes of various kinds. As a consequence, a big documentation update was
4829 needed. This delayed the release for rather longer than seemed good, especially
4830 in the light of a couple of (minor) security issues. Therefore, the changes
4831 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4832 release. So 4.44 and 4.50 are in effect two different branches that both start
4835 I have left the 4.50 change log unchanged; it contains all the changes since
4836 4.43. The change log for 4.44 is below; many of its items are identical to
4837 those for 4.50. This seems to be the most sensible way to preserve the
4838 historical information.
4844 1. Minor wording change to the doc/README.SIEVE file.
4846 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4847 computation of the current number of files was incorrect.
4849 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4850 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4853 4. Give more explanation in the error message when the command for a transport
4854 filter fails to execute.
4856 5. There are several places where Exim runs a non-Exim command in a
4857 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4858 was being done only for the command run by the queryprogram router. It is
4859 now done for all such subprocesses. The other cases are: ${run, transport
4860 filters, and the commands run by the lmtp and pipe transports.
4862 6. Added CONFIGURE_GROUP build-time option.
4864 7. Some older OS have a limit of 256 on the maximum number of file
4865 descriptors. Exim was using setrlimit() to set 1000 as a large value
4866 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4867 systems. I've change it so that if it can't get 1000, it tries for 256.
4869 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4870 was an oversight, and furthermore, ever since the addition of extra
4871 controls (e.g. 4.43/32), the checks on when to allow different forms of
4872 "control" were broken. There should now be diagnostics for all cases when a
4873 control that does not make sense is encountered.
4875 9. Added the /retain_sender option to "control=submission".
4877 10. $recipients is now available in the predata ACL (oversight).
4879 11. Tidy the search cache before the fork to do a delivery from a message
4880 received from the command line. Otherwise the child will trigger a lookup
4881 failure and thereby defer the delivery if it tries to use (for example) a
4882 cached ldap connection that the parent has called unbind on.
4884 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4885 of $address_data from the recipient verification was clobbered by the
4886 sender verification.
4888 13. The value of address_data from a sender verification is now available in
4889 $sender_address_data in subsequent conditions in the ACL statement.
4891 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4893 15. Added a new option "connect=<time>" to callout options, to set a different
4896 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4897 was its contents. (It was OK if the option was not defined at all.)
4899 17. A "Completed" log line is now written for messages that are removed from
4900 the spool by the -Mrm option.
4902 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4903 information about exactly what failed.
4905 19. Added -dd to debug only the daemon process.
4907 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4908 handles timeouts, both on the server side and network timeouts. Renamed the
4909 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4911 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4912 It is now set to "smtps".
4914 22. $host_address is now set to the target address during the checking of
4915 ignore_target_hosts.
4917 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4918 being passed; this would have caused $sender_host_name to have been used if
4919 matching the list had actually called for a host name (not very likely,
4920 since this list is usually IP addresses). A host name is now passed as
4923 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4924 code that specifies a non-restarting handler (typically sigaction() in
4925 modern systems) in an attempt to fix a rare and obscure crash bug.
4927 25. Narrowed the window for a race in the daemon that could cause it to ignore
4928 SIGCHLD signals. This is not a major problem, because they are used only to
4929 wake it up if nothing else does.
4931 26. A malformed maildirsize file could cause Exim to calculate negative values
4932 for the mailbox size or file count. Odd effects could occur as a result.
4933 The maildirsize information is now recalculated if the size or filecount
4936 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4937 support for a long time. Removed HAVE_SYS_VFS_H.
4939 28. Installed the latest version of exipick from John Jetmore.
4941 29. In an address list, if the pattern was not a regular expression, an empty
4942 subject address (from a bounce message) matched only if the pattern was an
4943 empty string. Non-empty patterns were not even tested. This was the wrong
4944 because it is perfectly reasonable to use an empty address as part of a
4945 database query. An empty address is now tested by patterns that are
4946 lookups. However, all the other forms of pattern expect the subject to
4947 contain a local part and a domain, and therefore, for them, an empty
4948 address still always fails if the pattern is not itself empty.
4950 30. Exim went into a mad DNS loop when attempting to do a callout where the
4951 host was specified on an smtp transport, and looking it up yielded more
4952 than one IP address.
4954 31. Re-factored the code for checking spool and log partition space into a
4955 function that finds that data and another that does the check. The former
4956 is then used to implement four new variables: $spool_space, $log_space,
4957 $spool_inodes, and $log_inodes.
4959 32. The RFC2047 encoding function was originally intended for short strings
4960 such as real names; it was not keeping to the 75-character limit for
4961 encoded words that the RFC imposes. It now respects the limit, and
4962 generates multiple encoded words if necessary. To be on the safe side, I
4963 have increased the buffer size for the ${rfc2047: expansion operator from
4966 33. It is now permitted to omit both strings after an "if" condition; if the
4967 condition is true, the result is "true". As before, when the second string
4968 is omitted, a false condition yields an empty string. This makes it less
4969 cumbersome to write custom ACL and router conditions.
4971 34. Failure to deliver a bounce message always caused it to be frozen, even if
4972 there was an errors_to setting on the router. The errors_to setting is now
4975 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4976 canonical form (fully expanded) before being placed in
4977 $sender_host_address.
4979 36. The table in the code that translates DNS record types into text (T_A to
4980 "A" for instance) was missing entries for NS and CNAME. It is just possible
4981 that this could have caused confusion if both these types were looked up
4982 for the same domain, because the text type is used as part of Exim's
4983 per-process caching. But the chance of anyone hitting this buglet seems
4986 37. The dnsdb lookup has been extended in a number of ways.
4988 (1) There is a new type, "zns", which walks up the domain tree until it
4989 finds some nameserver records. It should be used with care.
4991 (2) There is a new type, "mxh", which is like "mx" except that it returns
4992 just the host names, not the priorities.
4994 (3) It is now possible to give a list of domains (or IP addresses) to be
4995 looked up. The behaviour when one of the lookups defers can be
4996 controlled by a keyword.
4998 (4) It is now possible to specify the separator character for use when
4999 multiple records are returned.
5001 38. The dnslists ACL condition has been extended: it is now possible to supply
5002 a list of IP addresses and/or domains to be looked up in a particular DNS
5005 39. Added log_selector=+queue_time_overall.
5007 40. When running the queue in the test harness, wait just a tad after forking a
5008 delivery process, to get repeatability of debugging output.
5010 41. Include certificate and key file names in error message when GnuTLS fails
5011 to set them up, because the GnuTLS error message doesn't include the name
5012 of the failing file when there is a problem reading it.
5014 42. Allow both -bf and -bF in the same test run.
5016 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5018 44. The "Exiscan patch" is now merged into the mainline Exim source.
5020 45. Sometimes the final signoff response after QUIT could fail to get
5021 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5022 < 0 before doing a fflush(). This bug looks as though it goes back to the
5023 introduction of TLS in release 3.20, but "sometimes" must have been rare
5024 because the tests only now provoked it.
5026 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5027 (this can affect the format of dates).
5029 47. exim_tidydb, when checking for the continued existence of a message for
5030 which it has found a message-specific retry record, was not finding
5031 messages that were in split spool directories. Consequently, it was
5032 deleting retry records that should have stayed in existence.
5034 48. Steve fixed some bugs in eximstats.
5036 49. The SPA authentication driver was not abandoning authentication and moving
5037 on to the next authenticator when an expansion was forced to fail,
5038 contradicting the general specification for all authenticators. Instead it
5039 was generating a temporary error. It now behaves as specified.
5041 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5042 (the order specifies the preference for clients). The order is now AES256,
5043 AES128, 3DES, ARCFOUR128.
5045 51. Small patch to Sieve code - explicitly set From: when generating an
5048 52. Exim crashed if a remote delivery caused a very long error message to be
5049 recorded - for instance if somebody sent an entire SpamAssassin report back
5050 as a large number of 550 error lines. This bug was coincidentally fixed by
5051 increasing the size of one of Exim's internal buffers (big_buffer) that
5052 happened as part of the Exiscan merge. However, to be on the safe side, I
5053 have made the code more robust (and fixed the comments that describe what
5056 53. Now that there can be additional text after "Completed" in log lines (if
5057 the queue_time_overall log selector is set), a one-byte patch to exigrep
5058 was needed to allow it to recognize "Completed" as not the last thing in
5061 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5062 patch that reportedly fixes this has been added. I am not expert enough to
5063 create a test for it. This is what the patch creator wrote:
5065 "I found a little strange behaviour of ldap code when working with
5066 Windows 2003 AD Domain, where users was placed in more than one
5067 Organization Units. When I tried to give exim partial DN, the exit code
5068 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5069 But simultaneously result of request was absolutely normal ldap result,
5070 so I produce this patch..."
5072 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5073 REFERENCE, so I have modified the code to exclude the patch when that macro
5076 55. Some experimental protocols are using DNS PTR records for new purposes. The
5077 keys for these records are domain names, not reversed IP addresses. The
5078 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5079 leaves it alone. Component reversal etc. now happens only for IP addresses.
5082 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5084 57. Double the size of the debug message buffer (to 2048) so that more of very
5085 long debug lines gets shown.
5087 58. The exicyclog utility now does better if the number of log files to keep
5088 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5090 59. Two changes related to the smtp_active_hostname option:
5092 (1) $smtp_active_hostname is now available as a variable.
5093 (2) The default for smtp_banner uses $smtp_active_hostname instead
5094 of $primary_hostname.
5096 60. The host_aton() function is supposed to be passed a string that is known
5097 to be a valid IP address. However, in the case of IPv6 addresses, it was
5098 not checking this. This is a hostage to fortune. Exim now panics and dies
5099 if the condition is not met. A case was found where this could be provoked
5100 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5101 components; fortuitously, this particular loophole had already been fixed
5102 by change 4.50/55 above.
5104 If there are any other similar loopholes, the new check in host_aton()
5105 itself should stop them being exploited. The report I received stated that
5106 data on the command line could provoke the exploit when Exim was running as
5107 exim, but did not say which command line option was involved. All I could
5108 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5109 running as the user.
5112 61. There was a buffer overflow vulnerability in the SPA authentication code
5113 (which came originally from the Samba project). I have added a test to the
5114 spa_base64_to_bits() function which I hope fixes it.
5117 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5118 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5120 63. The daemon start-up calls getloadavg() while still root for those OS that
5121 need the first call to be done as root, but it missed one case: when
5122 deliver_queue_load_max is set with deliver_drop_privilege. This is
5123 necessary for the benefit of the queue runner, because there is no re-exec
5124 when deliver_drop_privilege is set.
5126 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5127 This has been fixed.
5129 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5130 was in use, was not putting the data itself into the right store pool;
5131 consequently, it could be overwritten for a subsequent message in the same
5132 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5135 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5137 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5138 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5139 the function were treating the return as a boolean value, which happened to
5140 work because 0=false and not-0=true, but is not correct code.
5142 68. The host_aton() function was not handling scoped IPv6 addresses (those
5143 with, for example, "%eth0" on the end) correctly.
5145 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5146 negated items (that is, ~something) in unsigned ints. Some compilers
5147 apparently mutter when there is no cast.
5149 70. If an address verification called from an ACL failed, and did not produce a
5150 user-specific message (i.e. there was only a "system" message), nothing was
5151 put in $acl_verify_message. In this situation, it now puts the system
5154 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5155 session; change 4.31/43 added the unwanted input to the log line - except
5156 that it did not do this in the start of session case. It now does.
5158 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5159 This is wrong and can cause the other end to generate a synchronization
5160 error if it is another Exim or anything else that does the synchronization
5161 check. A QUIT command is no longer sent after a timeout.
5163 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5164 during host lookups.
5166 74. The defer_ok option of callout verification was not working if it was used
5167 when verifying addresses in header lines, that is, for this case:
5169 verify = header_sender/callout=defer_ok
5171 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5172 those file descriptors could be used for SMTP connections. If anything
5173 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5174 could be sent to the SMTP client, causing chaos. The daemon now opens
5175 stdin, stdout, and stderr to /dev/null when it puts itself into the
5178 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5179 log by default. The user can override this with suitable Perl magic.
5181 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5182 the log message when discard triggers, was not working for the DATA ACL or
5183 for the non-SMTP ACL.
5185 78. Error message wording change in sieve.c.
5187 79. If smtp_accept_max_per_host was set, the number of connections could be
5188 restricted to fewer than expected, because the daemon was trying to set up
5189 a new connection before checking whether the processes handling previous
5190 connections had finished. The check for completed processes is now done
5191 earlier. On busy systems, this bug wouldn't be noticed because something
5192 else would have woken the daemon, and it would have reaped the completed
5195 80. If a message was submitted locally by a user whose login name contained one
5196 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5197 It caused a spool format error. I have fixed the spool reading code. A
5198 related problem was that the "from" clause in the Received: line became
5199 illegal because of the space(s). It is now covered by ${quote_local_part.
5201 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5204 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5206 83. Patch from Sieve maintainer to fix unterminated string problem in
5207 "vacation" handling.
5209 84. Some minor changes to the Linux configuration files to help with other
5210 OS variants using glibc.
5212 85. One more patch for Sieve to update vacation handling to latest spec.
5215 ----------------------------------------------------
5216 See the note above about the 4.44 and 4.50 releases.
5217 ----------------------------------------------------
5223 1. Change 4.43/35 introduced a bug that caused file counts to be
5224 incorrectly computed when quota_filecount was set in an appendfile
5227 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5228 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5231 3. Give more explanation in the error message when the command for a transport
5232 filter fails to execute.
5234 4. There are several places where Exim runs a non-Exim command in a
5235 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5236 was being done only for the command run by the queryprogram router. It is
5237 now done for all such subprocesses. The other cases are: ${run, transport
5238 filters, and the commands run by the lmtp and pipe transports.
5240 5. Some older OS have a limit of 256 on the maximum number of file
5241 descriptors. Exim was using setrlimit() to set 1000 as a large value
5242 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5243 systems. I've change it so that if it can't get 1000, it tries for 256.
5245 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5246 was an oversight, and furthermore, ever since the addition of extra
5247 controls (e.g. 4.43/32), the checks on when to allow different forms of
5248 "control" were broken. There should now be diagnostics for all cases when a
5249 control that does not make sense is encountered.
5251 7. $recipients is now available in the predata ACL (oversight).
5253 8. Tidy the search cache before the fork to do a delivery from a message
5254 received from the command line. Otherwise the child will trigger a lookup
5255 failure and thereby defer the delivery if it tries to use (for example) a
5256 cached ldap connection that the parent has called unbind on.
5258 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5259 of $address_data from the recipient verification was clobbered by the
5260 sender verification.
5262 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5263 was its contents. (It was OK if the option was not defined at all.)
5265 11. A "Completed" log line is now written for messages that are removed from
5266 the spool by the -Mrm option.
5268 12. $host_address is now set to the target address during the checking of
5269 ignore_target_hosts.
5271 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5272 being passed; this would have caused $sender_host_name to have been used if
5273 matching the list had actually called for a host name (not very likely,
5274 since this list is usually IP addresses). A host name is now passed as
5277 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5278 code that specifies a non-restarting handler (typically sigaction() in
5279 modern systems) in an attempt to fix a rare and obscure crash bug.
5281 15. Narrowed the window for a race in the daemon that could cause it to ignore
5282 SIGCHLD signals. This is not a major problem, because they are used only to
5283 wake it up if nothing else does.
5285 16. A malformed maildirsize file could cause Exim to calculate negative values
5286 for the mailbox size or file count. Odd effects could occur as a result.
5287 The maildirsize information is now recalculated if the size or filecount
5290 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5291 support for a long time. Removed HAVE_SYS_VFS_H.
5293 18. Updated exipick to current release from John Jetmore.
5295 19. Allow an empty sender to be matched against a lookup in an address list.
5296 Previously the only cases considered were a regular expression, or an
5299 20. Exim went into a mad DNS lookup loop when doing a callout where the
5300 host was specified on the transport, if the DNS lookup yielded more than
5303 21. The RFC2047 encoding function was originally intended for short strings
5304 such as real names; it was not keeping to the 75-character limit for
5305 encoded words that the RFC imposes. It now respects the limit, and
5306 generates multiple encoded words if necessary. To be on the safe side, I
5307 have increased the buffer size for the ${rfc2047: expansion operator from
5310 22. Failure to deliver a bounce message always caused it to be frozen, even if
5311 there was an errors_to setting on the router. The errors_to setting is now
5314 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5315 canonical form (fully expanded) before being placed in
5316 $sender_host_address.
5318 24. Updated eximstats to version 1.33
5320 25. Include certificate and key file names in error message when GnuTLS fails
5321 to set them up, because the GnuTLS error message doesn't include the name
5322 of the failing file when there is a problem reading it.
5324 26. Expand error message when OpenSSL has problems setting up cert/key files.
5327 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5328 (this can affect the format of dates).
5330 28. exim_tidydb, when checking for the continued existence of a message for
5331 which it has found a message-specific retry record, was not finding
5332 messages that were in split spool directories. Consequently, it was
5333 deleting retry records that should have stayed in existence.
5335 29. eximstats updated to version 1.35
5336 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5337 1.35 - bugfix such that pie charts by volume are generated correctly
5339 30. The SPA authentication driver was not abandoning authentication and moving
5340 on to the next authenticator when an expansion was forced to fail,
5341 contradicting the general specification for all authenticators. Instead it
5342 was generating a temporary error. It now behaves as specified.
5344 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5345 (the order specifies the preference for clients). The order is now AES256,
5346 AES128, 3DES, ARCFOUR128.
5348 31. Small patch to Sieve code - explicitly set From: when generating an
5351 32. Exim crashed if a remote delivery caused a very long error message to be
5352 recorded - for instance if somebody sent an entire SpamAssassin report back
5353 as a large number of 550 error lines. This bug was coincidentally fixed by
5354 increasing the size of one of Exim's internal buffers (big_buffer) that
5355 happened as part of the Exiscan merge. However, to be on the safe side, I
5356 have made the code more robust (and fixed the comments that describe what
5359 33. Some experimental protocols are using DNS PTR records for new purposes. The
5360 keys for these records are domain names, not reversed IP addresses. The
5361 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5362 leaves it alone. Component reversal etc. now happens only for IP addresses.
5365 34. The host_aton() function is supposed to be passed a string that is known
5366 to be a valid IP address. However, in the case of IPv6 addresses, it was
5367 not checking this. This is a hostage to fortune. Exim now panics and dies
5368 if the condition is not met. A case was found where this could be provoked
5369 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5370 components; fortuitously, this particular loophole had already been fixed
5371 by change 4.50/55 or 4.44/33 above.
5373 If there are any other similar loopholes, the new check in host_aton()
5374 itself should stop them being exploited. The report I received stated that
5375 data on the command line could provoke the exploit when Exim was running as
5376 exim, but did not say which command line option was involved. All I could
5377 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5378 running as the user.
5381 35. There was a buffer overflow vulnerability in the SPA authentication code
5382 (which came originally from the Samba project). I have added a test to the
5383 spa_base64_to_bits() function which I hope fixes it.
5386 36. The daemon start-up calls getloadavg() while still root for those OS that
5387 need the first call to be done as root, but it missed one case: when
5388 deliver_queue_load_max is set with deliver_drop_privilege. This is
5389 necessary for the benefit of the queue runner, because there is no re-exec
5390 when deliver_drop_privilege is set.
5392 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5393 was in use, was not putting the data itself into the right store pool;
5394 consequently, it could be overwritten for a subsequent message in the same
5395 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5398 38. Sometimes the final signoff response after QUIT could fail to get
5399 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5400 < 0 before doing a fflush(). This bug looks as though it goes back to the
5401 introduction of TLS in release 3.20, but "sometimes" must have been rare
5402 because the tests only now provoked it.
5408 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5409 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5410 Now it returns an integer. A number of calls were still expecting a T/F
5411 return. Fortuitously, in all cases, the tests worked in OK situations,
5412 which is the norm. However, things would have gone wrong on any write
5413 failures on the smtp file descriptor. This function is used when sending
5414 messages over SMTP and also when doing verify callouts.
5416 2. When Exim is called to do synchronous delivery of a locally submitted
5417 message (the -odf or -odi options), it no longer closes stderr before doing
5420 3. Implemented the mua_wrapper option.
5422 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5424 5. Implemented the functions header_remove(), header_testname(),
5425 header_add_at_position(), and receive_remove_recipient(), and exported them
5428 6. If an ACL "warn" statement specified the addition of headers, Exim already
5429 inserted X-ACL-Warn: at the start if there was no header name. However, it
5430 was not making this test for the second and subsequent header lines if
5431 there were newlines in the string. This meant that an invalid header could
5432 be inserted if Exim was badly configured.
5434 7. Allow an ACL "warn" statement to add header lines at the start or after all
5435 the Received: headers, as well as at the end.
5437 8. Added the rcpt_4xx retry error code.
5439 9. Added postmaster_mailfrom=xxx to callout verification option.
5441 10. Added mailfrom=xxxx to the callout verification option, for verify=
5444 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5445 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5447 12. Inserted some casts to stop certain compilers warning when using pointer
5448 differences as field lengths or precisions in printf-type calls (mostly
5449 affecting debugging statements).
5451 13. Added optional readline() support for -be (dynamically loaded).
5453 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5454 same clock tick as a message's arrival, so that its received time was the
5455 same as the "first fail" time on the retry record, and that message
5456 remained on the queue past the ultimate address timeout, every queue runner
5457 would try a delivery (because it was past the ultimate address timeout) but
5458 after another failure, the ultimate address timeout, which should have then
5459 bounced the address, did not kick in. This was a "< instead of <=" error;
5460 in most cases the first failure would have been in the next clock tick
5461 after the received time, and all would be well.
5463 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5464 being recognized when the domain list was tested by the match_domain
5465 condition in an expansion string.
5467 16. Added the ${str2b64: operator.
5469 17. Exim was always calling setrlimit() to set a large limit for the number of
5470 processes, without checking whether the existing limit was already
5471 adequate. (It did check for the limit on file descriptors.) Furthermore,
5472 errors from getrlimit() and setrlimit() were being ignored. Now they are
5473 logged to the main and panic logs, but Exim does carry on, to try to do its
5474 job under whatever limits there are.
5476 18. Imported PCRE 5.0.
5478 19. Trivial typo in log message " temporarily refused connection" (the leading
5481 20. If the log selector return_path_on_delivery was set and an address was
5482 redirected to /dev/null, the delivery process crashed because it assumed
5483 that a return path would always be set for a "successful" delivery. In this
5484 case, the whole delivery is bypassed as an optimization, and therefore no
5487 21. Internal re-arrangement: the function for sending a challenge and reading
5488 a response while authentication was assuming a zero-terminated challenge
5489 string. It's now changed to take a pointer and a length, to allow for
5490 binary data in such strings.
5492 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5494 23. Exim was not respecting finduser_retries when seeking the login of the
5495 uid under which it was called; it was always trying 10 times. (The default
5496 setting of finduser_retries is zero.) Also, it was sleeping after the final
5497 failure, which is pointless.
5499 24. Implemented tls_on_connect_ports.
5501 25. Implemented acl_smtp_predata.
5503 26. If the domain in control=submission is set empty, Exim assumes that the
5504 authenticated id is a complete email address when it generates From: or
5505 Sender: header lines.
5507 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5508 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5509 chown and chgrp in /bin and hostname in /usr/bin.
5511 28. Exim was keeping the "process log" file open after each use, just as it
5512 does for the main log. This opens the possibility of it remaining open for
5513 long periods when the USR1 signal hits a daemon. Occasional processlog
5514 errors were reported, that could have been caused by this. Anyway, it seems
5515 much more sensible not to leave this file open at all, so that is what now
5518 29. The long-running daemon process does not normally write to the log once it
5519 has entered its main loop, and it closes the log before doing so. This is
5520 so that log files can straightforwardly be renamed and moved. However,
5521 there are a couple of unusual error situations where the daemon does write
5522 log entries, and I had neglected to close the log afterwards.
5524 30. The text of an SMTP error response that was received during a remote
5525 delivery was being truncated at 512 bytes. This is too short for some of
5526 the long messages that one sometimes sees. I've increased the limit to
5529 31. It is now possible to make retry rules that apply only when a message has a
5530 specific sender, in particular, an empty sender.
5532 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5533 it possible to be selective about when SMTP synchronization is enforced.
5535 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5537 32. Implemented hosts_connection_nolog.
5539 33. Added an ACL for QUIT.
5541 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5544 35. Added mailbox_size and mailbox_filecount to appendfile.
5546 36. Added control = no_multiline_responses to ACLs.
5548 37. There was a bug in the logic of the code that waits for the clock to tick
5549 in the case where the clock went backwards by a substantial amount such
5550 that the microsecond fraction of "now" was more than the microsecond
5551 fraction of "then" (but the whole seconds number was less).
5553 38. Added support for the libradius Radius client library this is found on
5554 FreeBSD (previously only the radiusclient library was supported).
5560 1. When certain lookups returned multiple values in the form name=value, the
5561 quoting of the values was not always being done properly. Specifically:
5562 (a) If the value started with a double quote, but contained no whitespace,
5564 (b) If the value contained whitespace other than a space character (i.e.
5565 tabs or newlines or carriage returns) it was not quoted.
5566 This fix has been applied to the mysql and pgsql lookups by writing a
5567 separate quoting function and calling it from the lookup code. The fix
5568 should probably also be applied to nisplus, ibase and oracle lookups, but
5569 since I cannot test any of those, I have not disturbed their existing code.
5571 2. A hit in the callout cache for a specific address caused a log line with no
5572 reason for rejecting RCPT. Now it says "Previous (cached) callout
5573 verification failure".
5575 3. There was an off-by-one bug in the queryprogram router. An over-long
5576 return line was truncated at 256 instead of 255 characters, thereby
5577 overflowing its buffer with the terminating zero. As well as fixing this, I
5578 have increased the buffer size to 1024 (and made a note to document this).
5580 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5581 when Exim is waiting for an SMTP response from a remote server, Exim
5582 restarts its select() call on the socket, thereby resetting its timeout.
5583 This is not a problem when such interrupts are rare. Somebody set up a cron
5584 job to run exiwhat every 2 minutes, which is less than the normal select()
5585 timeout (5 or 10 minutes). This meant that the select() timeout never
5586 kicked in because it was always reset. I have fixed this by comparing the
5587 time when an interrupt arrives with the time at the start of the first call
5588 to select(). If more time than the timeout has elapsed, the interrupt is
5589 treated as a timeout.
5591 5. Some internal re-factoring in preparation for the addition of Sieve
5592 extensions (by MH). In particular, the "personal" test is moved to a
5593 separate function, and given an option for scanning Cc: and Bcc: (which is
5594 not set for Exim filters).
5596 6. When Exim created an email address using the login of the caller as the
5597 local part (e.g. when creating a From: or Sender: header line), it was not
5598 quoting the local part when it contained special characters such as @.
5600 7. Installed new OpenBSD configuration files.
5602 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5603 try to make them clearer.
5605 9. Callout options, other than the timeout value, were being ignored when
5606 verifying sender addresses in header lines. For example, when using
5608 verify = header_sender/callout=no_cache
5610 the cache was (incorrectly) being used.
5612 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5613 only the Cygwin environment.
5615 11. When return_path_on_delivery was set as a log selector, if different remote
5616 addresses in the same message used different return paths and parallel
5617 remote delivery occurred, the wrong values would sometimes be logged.
5618 (Whenever a remote delivery process finished, the return path value from
5619 the most recently started remote delivery process was logged.)
5621 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5622 lines when AUTH and/or TLS are in use. This is the "received protocol"
5623 field. Exim used to use "asmtp" for authenticated SMTP, without any
5624 indication (in the protocol name) for TLS use. Now it follows the RFC and
5625 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5626 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5627 names appear in log lines as well as in Received: header lines.
5629 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5630 extensions, and comparison tests, and to fix some bugs.
5632 14. Changes to the "personal" filter test:
5634 (1) The test was buggy in that it was just doing the equivalent of
5635 "contains" tests on header lines. For example, if a user's address was
5636 anne@some.where, the "personal" test would incorrectly be true for
5638 To: susanne@some.where
5640 This test is now done by extracting each address from the header in turn,
5641 and checking the entire address. Other tests that are part of "personal"
5642 are now done using regular expressions (for example, to check local parts
5643 of addresses in From: header lines).
5645 (2) The list of non-personal local parts in From: addresses has been
5646 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5647 taken from the Sieve specification recommendations.
5649 (3) If the message contains any header line starting with "List-" it is
5650 treated as non-personal.
5652 (4) The test for "circular" in the Subject: header line has been removed
5653 because it now seems ill-conceived.
5655 15. Minor typos in src/EDITME comments corrected.
5657 16. Installed latest exipick from John Jetmore.
5659 17. If headers_add on a router specified a text string that was too long for
5660 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5661 of string_sprintf() is now avoided.
5663 18. $message_body_size was not set (it was always zero) when running the DATA
5664 ACL and the local_scan() function.
5666 19. For the "mail" command in an Exim filter, no default was being set for
5667 the once_repeat time, causing a random time value to be used if "once" was
5668 specified. (If the value happened to be <= 0, no repeat happened.) The
5669 default is now 0s, meaning "never repeat". The "vacation" command was OK
5670 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5671 (I found it when inspecting the code).
5673 20. There is now an overall timeout for performing a callout verification. It
5674 defaults to 4 times the callout timeout, which applies to individual SMTP
5675 commands during the callout. The overall timeout applies when there is more
5676 than one host that can be tried. The timeout is checked before trying the
5677 next host. This prevents very long delays if there are a large number of
5678 hosts and all are timing out (e.g. when the network connections are timing
5679 out). The value of the overall timeout can be changed by specifying an
5680 additional sub-option for "callout", called "maxwait". For example:
5682 verify = sender/callout=5s,maxwait=20s
5684 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5685 to the end before writing, but this should make it even safer).
5687 22. Exim was forgetting that it had advertised PIPELINING for the second and
5688 subsequent messages on an SMTP connection. It was also not resetting its
5689 memory on STARTTLS and an internal HELO.
5691 23. When Exim logs an SMTP synchronization error within a session, it now
5692 records whether PIPELINING has been advertised or not.
5694 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5695 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5696 rather than long int.
5698 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5700 26. Added the never_mail option to autoreply.
5706 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5707 crash if the getsockname() call failed; this can happen if a connection is
5708 closed very soon after it is established. The problem was simply in the
5709 order in which certain operations were done, causing Exim to try to write
5710 to the SMTP stream before it had set up the file descriptor. The bug has
5711 been fixed by making things happen in the correct order.
5717 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5718 before the connection was closed, thus losing the rejection response.
5720 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5721 some early Solaris releases, but causes trouble in current releases where
5722 socklen_t is defined.
5724 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5727 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5730 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5731 that releasing the top of it at the end releases what was used for sub-
5732 expansions (unless the block got too big). However, discard this block if
5733 the first thing is a variable or header, so that we can use its block when
5734 it is dynamic (useful for very large $message_headers, for example).
5736 6. Lookups now cache *every* query, not just the most recent. A new, separate
5737 store pool is used for this. It can be recovered when all lookup caches are
5738 flushed. Lookups now release memory at the end of their result strings.
5739 This has involved some general refactoring of the lookup sources.
5741 7. Some code has been added to the store_xxx() functions to reduce the amount
5742 of flapping under certain conditions.
5744 8. log_incoming_interface used to affect only the <= reception log lines. Now
5745 it causes the local interface and port to be added to several more SMTP log
5746 lines, for example "SMTP connection from", and rejection lines.
5748 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5750 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5752 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5753 could be overwritten at the end of the current message (or the start of a
5754 new message if it was set in a HELO ACL). The value is now preserved for
5755 the duration of the SMTP connection.
5757 12. If a transport had a headers_rewrite setting, and a matching header line
5758 contained an unqualified address, that address was qualified, even if it
5759 did not match any rewriting rules. The underlying bug was that the values
5760 of the flags that permit the existence of unqualified sender and recipient
5761 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5762 non-local messages, and by -bnq for local messages) were not being
5763 preserved with the message after it was received.
5765 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5766 "next input=" as part of the text comprising the host identity instead of
5767 the correct text. The code was using the same buffer for two different
5768 strings. However, depending on which order the printing function evaluated
5769 its arguments, the bug did not always show up. Under Linux, for example, my
5770 test suite worked just fine.
5772 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5773 doesn't work with some older versions of Perl. It has been changed to "my",
5774 which in any case is probably the better facility to use.
5776 15. A really picky compiler found some instances of statements for creating
5777 error messages that either had too many or two few arguments for the format
5780 16. The size of the buffer for calls to the DNS resolver has been increased
5781 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5782 for addresses that have a lot of PTR records. This alleviates a problem; it
5783 does not fully solve it.
5785 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5786 buffer now truncates the list and logs the incident, which is the same
5787 action as happens when Exim is looking up a host name and its aliases.
5788 Previously in this situation something unpredictable would happen;
5789 sometimes it was "internal error: store_reset failed".
5791 18. If a server dropped the connection unexpectedly when an Exim client was
5792 using GnuTLS and trying to read a response, the client delivery process
5793 crashed while trying to generate an error log message.
5795 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5796 string, for example:
5798 warn message = H1: something\nH2: something
5800 the text was added as a single header line from Exim's point of view
5801 though it ended up OK in the delivered message. However, searching for the
5802 second and subsequent header lines using $h_h2: did not work. This has been
5803 fixed. Similarly, if a system filter added multiple headers in this way,
5804 the routers could not see them.
5806 20. Expanded the error message when iplsearch is called with an invalid key to
5807 suggest using net-iplsearch in a host list.
5809 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5810 ACLs are no longer actually imposed (and a message to that effect is
5813 22. If a "gecos" field in a passwd entry contained escaped characters, in
5814 particular, if it contained a \" sequence, Exim got it wrong when building
5815 a From: or a Sender: header from that name. A second bug also caused
5816 incorrect handling when an unquoted " was present following a character
5817 that needed quoting.
5819 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5820 was not being matched caselessly.
5822 24. Arranged for all hyphens in the exim.8 source to be escaped with
5825 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5826 properly. Recipient callout cache records were still being keyed to include
5827 the sender, even when use_sender was set false. This led to far more
5828 callouts that were necessary. The sender is no longer included in the key
5829 when use_sender is false.
5831 26. Added "control = submission" modifier to ACLs.
5833 27. Added the ${base62d: operator to decode base 62 numbers.
5835 28. dnsdb lookups can now access SRV records.
5837 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5838 the configuration file.
5840 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5841 (-v) mode. This makes the output for a verbose queue run more intelligible.
5843 31. Added a use_postmaster feature to recipient callouts.
5845 32. Added the $body_zerocount variable, containing the number of binary zero
5846 bytes in the message body.
5848 33. The time of last modification of the "new" subdirectory is now used as the
5849 "mailbox time last read" when there is a quota error for a maildir
5852 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5854 35. Added +ignore_unknown as a special item in host lists.
5856 36. Code for decoding IPv6 addresses in host lists is now included, even if
5857 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5858 address was recognized as an IP address, but was then not correctly decoded
5859 into binary, causing unexpected and incorrect effects when compared with
5866 1. Very minor rewording of debugging text in manualroute to say "list of
5867 hosts" instead of "hostlist".
5869 2. If verify=header_syntax was set, and a header line with an unqualified
5870 address (no domain) and a large number of spaces between the end of the
5871 name and the colon was received, the reception process suffered a buffer
5872 overflow, and (when I tested it) crashed. This was caused by some obsolete
5873 code that should have been removed. The fix is to remove it!
5875 3. When running in the test harness, delay a bit after writing a bounce
5876 message to get a bit more predictability in the log output.
5878 4. Added a call to search_tidyup() just before forking a reception process. In
5879 theory, someone could use a lookup in the expansion of smtp_accept_max_
5880 per_host which, without the tidyup, could leave open a database connection.
5882 5. Added the variables $recipient_data and $sender_data which get set from a
5883 lookup success in an ACL "recipients" or "senders" condition, or a router
5884 "senders" option, similar to $domain_data and $local_part_data.
5886 6. Moved the writing of debug_print from before to after the "senders" test
5889 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5890 problems for message scanning, either using a data ACL, or using
5891 local_scan() because the Received: header was not generated till after they
5892 were called (in order to set the time as the time of reception completion).
5893 I have revised the way this works. The header is now generated after the
5894 body is received, but before the ACL or local_scan() are called. After they
5895 are run, the timestamp in the header is updated.
5901 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5902 before starting a queue runner without re-exec. This happened only when
5903 deliver_drop_privilege was set or when the Exim user was set to root. The
5904 effect of the bug was that timeouts during subsequent deliveries caused
5905 crashes instead of being properly handled. The handler is now left at its
5906 default (and expected) setting.
5908 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5909 message, again when deliver_drop_privilege is set or Exim is run as root.
5910 The bug described in (1) was not present in this case, but the tidying up
5911 of the other signals was missing. I have made the two cases consistent.
5913 3. The ignore_target_hosts setting on a manualroute router was being ignored
5914 for hosts that were looked up using the /MX notation.
5916 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5919 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5920 operated on the sender address. After changing the $sender_address to <>
5921 for the sender address verify, Exim was re-instated it as the original
5922 (before rewriting) address, but remembering that it had rewritten it, so it
5923 wasn't rewriting it again. This bug also had the effect of breaking the
5924 sender address verification caching when the sender address was rewritten.
5926 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5927 This has been changed so that if the ip literal address matches
5928 ignore_target_hosts, the router declines.
5930 7. Added expansion conditions match_domain, match_address, and match_local_
5931 part (NOT match_host).
5933 8. The placeholder for the Received: header didn't have a length field set.
5935 9. Added code to Exim itself and to exim_lock to test for a specific race
5936 condition that could lead to file corruption when using MBX delivery. The
5937 issue is with the lockfile that is created in /tmp. If this file is removed
5938 after a process has opened it but before that process has acquired a lock,
5939 there is the potential for a second process to recreate the file and also
5940 acquire a lock. This could lead to two Exim processes writing to the file
5941 at the same time. The added code performs the same test as UW imapd; it
5942 checks after acquiring the lock that its file descriptor still refers to
5943 the same named file.
5945 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5946 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5949 11. Added the smtp_active_hostname option. If used, this will typically be made
5950 to depend on the incoming interface address. Because $interface_address is
5951 not set up until the daemon has forked a reception process, error responses
5952 that can happen earlier (such as "too many connections") no longer contain
5955 12. If an expansion in a condition on a "warn" statement fails because a lookup
5956 defers, the "warn" statement is abandoned, and the next ACL statement is
5957 processed. Previously this caused the whole ACL to be aborted.
5959 13. Added the iplsearch lookup type.
5961 14. Added ident_timeout as a log selector.
5963 15. Added tls_certificate_verified as a log selector.
5965 16. Added a global option tls_require_ciphers (compare the smtp transport
5966 option of the same name). This controls incoming TLS connections.
5968 17. I finally figured out how to make tls_require_ciphers do a similar thing
5969 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5970 before starting the TLS session.
5972 18. Tabs are now shown as \t in -bP output.
5974 19. If the log selector return_path_on_delivery was set, Exim crashed when
5975 bouncing a message because it had too many Received: header lines.
5977 20. If two routers both had headers_remove settings, and the first one included
5978 a superfluous trailing colon, the final name in the first list and the
5979 first name in the second list were incorrectly joined into one item (with a
5980 colon in the middle).
5986 1. Added -C and -D options to the exinext utility, mainly to make it easier
5987 to include in the automated testing, but these could be helpful when
5988 multiple configurations are in use.
5990 2. The exinext utility was not formatting the output nicely when there was
5991 an alternate port involved in the retry record key, nor when there was a
5992 message id as well (for retries that were specific to a specific message
5993 and a specific host). It was also confused by IPv6 addresses, because of
5994 the additional colons they contain. I have fixed the IPv4 problem, and
5995 patched it up to do a reasonable job for IPv6.
5997 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5998 delivery, the log line now contains "pipelined" if PIPELINING was used.
6000 4. An SMTP transport process used to panic and die if the bind() call to set
6001 an explicit outgoing interface failed. This has been changed; it is now
6002 treated in the same way as a connect() failure.
6004 5. A reference to $sender_host_name in the part of a conditional expansion
6005 that was being skipped was still causing a DNS lookup. This no longer
6008 6. The def: expansion condition was not recognizing references to header lines
6009 that used bh_ and bheader_.
6011 7. Added the _cache feature to named lists.
6013 8. The code for checking quota_filecount in the appendfile transport was
6014 allowing one more file than it should have been.
6016 9. For compatibility with Sendmail, the command line option
6024 and sets the incoming protocol and host name (for trusted callers). The
6025 host name and its colon can be omitted when only the protocol is to be set.
6026 Note the Exim already has two private options, -pd and -ps, that refer to
6027 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6028 "s", but I don't think that's a major issue.
6030 10. A number of refactoring changes to the code, none of which should affect
6033 (a) The number of logging options was getting close to filling up the
6034 32-bit word that was used as a bit map. I have split them into two classes:
6035 those that are passed in the argument to log_write(), and those that are
6036 only ever tested independently outside of that function. These are now in
6037 separate 32-bit words, so there is plenty of room for expansion again.
6038 There is no change in the user interface or the logging behaviour.
6040 (b) When building, for example, log lines, the code previously used a
6041 macro that called string_cat() twice, in order to add two strings. This is
6042 not really sufficiently general. Furthermore, there was one instance where
6043 it was actually wrong because one of the argument was used twice, and in
6044 one call a function was used. (As it happened, calling the function twice
6045 did not affect the overall behaviour.) The macro has been replaced by a
6046 function that can join an arbitrary number of extra strings onto a growing
6049 (c) The code for expansion conditions now uses a table and a binary chop
6050 instead of a serial search (which was left over from when there were very
6051 few conditions). Also, it now recognizes conditions like "pam" even when
6052 the relevant support is not compiled in: a suitably worded error message is
6053 given if an attempt is made to use such a condition.
6055 11. Added ${time_interval:xxxxx}.
6057 12. A bug was causing one of the ddress fields not to be passed back correctly
6058 from remote delivery subprocesses. The field in question was not being
6059 subsequently used, so this caused to problems in practice.
6061 13. Added new log selectors queue_time and deliver_time.
6063 14. Might have fixed a bug in maildirsizefile handling that threw up
6064 "unexpected character" debug warnings, and recalculated the data
6065 unnecessarily. In any case, I expanded the warning message to give more
6068 15. Added the message "Restricted characters in address" to the statements in
6069 the default ACL that block characters like @ and % in local parts.
6071 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6072 Three changes have been made:
6074 (a) There was a serious bug; a negative response to MAIL caused the whole
6075 recipient domain to be cached as invalid, thereby blocking all messages
6076 to all local parts at the same domain, from all senders. This bug has
6077 been fixed. The domain is no longer cached after a negative response to
6078 MAIL if the sender used is not empty.
6080 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6083 (c) A new callout option, "use_sender" has been added for people who want
6084 the modified behaviour.
6090 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6093 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6094 indeed breaks things for older releases.
6096 3. Added additional logging to the case where there is a problem reading data
6097 from a filter that is running in a subprocess using a pipe, in order to
6098 try to track down a specific problem.
6100 4. Testing facility fudge: when running in the test harness and attempting
6101 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6102 getting "No route to host". Convert this to a timeout.
6104 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6107 6. Some OS don't have socklen_t but use size_t instead. This affects the
6108 fifth argument of getsockopt() amongst other things. This is now
6109 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6110 can be set for individual OS. I have set it for SunOS5, OSF1, and
6111 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6112 some earlier ones do not.
6114 7. Change 4.30/15 was not doing the test caselessly.
6116 8. The standard form for an IPv6 address literal was being rejected by address
6117 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6118 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6119 this, as well as the form without the "IPv6" on the front (but only when
6120 address literals are enabled, of course).
6122 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6124 10. Exim crashed if a message with an empty sender address specified by -f
6125 encountered a router with an errors_to setting. This could be provoked only
6126 by a command such as
6130 where an empty string was supplied; "<>" did not hit this bug.
6132 11. Installed PCRE release 4.5.
6134 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6135 remained set. It is now erased.
6137 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6138 times from message ids (which are base 36 rather than the normal 62).
6140 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6141 were being counted as actual protocol errors, and logged if the log
6142 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6143 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6144 and DATA following a set of rejected RCPTs do not count as protocol errors.
6145 In other words, Exim assumes they were pipelined, though this may not
6146 actually be the case. Of course, in all cases the client gets an
6147 appropriate error code.
6149 15. If a lookup fails in an ACL condition, a message about the failure may
6150 be available; it is used if testing the ACL cannot continue, because most
6151 such messages specify what the cause of the deferral is. However, some
6152 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6153 that caused an old message to be retained and used if a later statement
6154 caused a defer, replacing the real cause of the deferral.
6156 16. If an IP address had so many PTR records that the DNS lookup buffer
6157 was not large enough to hold them, Exim could crash while trying to process
6158 the truncated data. It now detects and logs this case.
6160 17. Further to 4.21/58, another change has been made: if (and only if) the
6161 first line of a message (the first header line) ends with CRLF, a bare LF
6162 in a subsequent header line has a space inserted after it, so as not to
6163 terminate the header.
6165 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6166 unnecessarily, used atoi() instead of strtol(), and didn't check the
6167 termination when getting file sizes from file names by regex.
6169 19. Completely re-implemented the support for maildirsize files, in the light
6170 of a number of problems with the previous contributed implementation
6171 (4.30/29). In particular:
6173 . If the quota is zero, the maildirsize file is maintained, but no quota is
6176 . If the maildir directory does not exist, it is created before any attempt
6177 to write a maildirsize file.
6179 . The quota value in the file is just a cache; if the quota is changed in
6180 the transport, the new value overrides.
6182 . A regular expression is available for excluding directories from the
6185 20. The autoreply transport checks the characters in options that define the
6186 message's headers; it allows continued headers, but it was checking with
6187 isspace() after an embedded newline instead of explicitly looking for a
6190 21. If all the "regular" hosts to which an address was routed had passed their
6191 expiry times, and had not reached their retry times, the address was
6192 bounced, even if fallback hosts were defined. Now Exim should go on to try
6195 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6196 equivalent code in the SMTP transport. Some hosts send humungous responses
6197 to HELO/EHLO, more than 1024 it seems.
6199 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6200 gives compiler warnings in some environments. I've now done it "properly",
6203 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6204 (because of problems with the built-in one) was declared to return uschar *
6205 instead of char *, causing compiler failure.
6207 25. Fixed a file descriptor leak when processing alias/forward files.
6209 26. Fixed a minor format string issue in dbfn.c.
6211 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6213 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6214 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6217 29. When a sender address is verified, it is cached, to save repeating the test
6218 when there is more than one recipient in a message. However, when the
6219 verification involves a callout, it is possible for different callout
6220 options to be set for different recipients. It is too complicated to keep
6221 track of this in the cache, so now Exim always runs a verification when a
6222 callout is required, relying on the callout cache for the optimization.
6223 The overhead is duplication of the address routing, but this should not be
6226 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6227 to be verified with callout=postmaster, and the main callout worked but the
6228 postmaster check failed, the verification correctly failed. However, if a
6229 subsequent RCPT command asked for sender verification *without* the
6230 postmaster check, incorrect caching caused this verification also to fail,
6233 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6234 it was not caching the DNS options (qualify_single, search_parents) that
6235 were used when the lookup failed. A subsequent lookup with different
6236 options therefore always gave the same answer, though there were cases
6237 where it should not have. (Example: a "domains = !$mx_any" option on a
6238 dnslookup router: the "domains" option is always processed without any
6239 widening, but the router might have qualify_single set.) Now Exim uses the
6240 cached value only when the same options are set.
6242 32. Added John Jetmore's "exipick" utility to the distribution.
6244 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6245 than a timeout (e.g. a certificate is required, and is not provided), an
6246 Exim server now closes the connection immediately. Previously it waited for
6247 the client to close - but if the client is SSL, it seems that they each
6248 wait for each other, leading to a delay before one of them times out.
6250 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6251 maintained 0.8.x compatibility because I don't think many are using it, and
6252 it is clearly obsolete.
6254 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6257 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6258 client certificate was expired. A simple patch fixes this, though I don't
6259 understand the full logic of why the verify callback is called multiple
6262 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6263 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6264 which causes problems with some clients (such as the Certicom SSL Plus
6265 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6266 disables the coutermeasure allowing Eudora to connect."
6268 38. Exim was not checking that a write() to a log file succeeded. This could
6269 lead to Bad Things if a log got too big, in particular if it hit a file
6270 size limit. Exim now panics and dies if it cannot write to a log file, just
6271 as it does if it cannot open a log file.
6273 39. Modified OS/Makefile-Linux so that it now contains
6275 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6277 The two -D definitions ensure that Exim is compiled with large file
6278 support, which makes it possible to handle log files that are bigger than
6281 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6282 instance) a domain was checked against a named list that involved a lookup,
6283 causing $domain_data to be set, then another domain was checked against the
6284 same list, then the first domain was re-checked, the value of $domain_data
6285 after the final check could be wrong. In particular, if the second check
6286 failed, it could be set empty. This bug probably also applied to
6289 41. The strip_trailing_dot option was not being applied to the address given
6290 with the -f command-line option.
6292 42. The code for reading a message's header from the spool was incrementing
6293 $received_count, but never initializing it. This meant that the value was
6294 incorrect (doubled) while delivering a message in the same process in which
6295 it was received. In the most common configuration of Exim, this never
6296 happens - a fresh exec is done - but it can happen when
6297 deliver_drop_privilege is set.
6299 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6300 it now includes up to 150 characters of the unexpected data in the log
6303 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6304 and building data strings. The size of both of these buffers was 10 000
6305 bytes - far larger than anybody would *ever* want, thought I. Needless to
6306 say, somebody hit the limit. I have increased the maximum line length to
6307 20 000 and the maximum data length of concatenated lines to 100 000. I have
6308 also fixed two bugs, because there was no checking on these buffers. Tsk,
6309 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6310 buffer is too small.
6312 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6313 lsearch lookups. Now it does.
6315 46. When parsing a route_list item in a manualroute router, a fixed-length
6316 buffer was used for the list of hosts. I made this 1024 bytes long,
6317 thinking that nobody would ever have a list of hosts that long. Wrong.
6318 Somebody had a whole pile of complicated expansion conditions, and the
6319 string was silently truncated, leading to an expansion error. It turns out
6320 that it is easier to change to an unlimited length (owing to other changes
6321 that have happened since this code was originally written) than to build
6322 structure for giving a limitation error. The length of the item that
6323 expands into the list of hosts is now unlimited.
6325 47. The lsearch lookup could not handle data where the length of text line was
6326 more than 4095 characters. Such lines were truncated, leading to shortened
6327 data being returned. It should now handle lines of any length.
6329 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6330 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6333 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6334 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6335 no longer happens in comment lines. A list of replacements is now placed
6336 at the head of all of the source files, except those whose only change is
6337 to replace PERL_COMMAND in the very first #! line.
6339 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6340 messages on the queue, with a bottom-up merge sort, using code contributed
6341 by Michael Haardt. This should make operations like -bp somewhat faster on
6342 large queues. It won't affect queue runners, except when queue_run_in_order
6345 51. Installed eximstats 1.31 in the distribution.
6347 52. Added support for SRV lookups to the dnslookup router.
6349 53. If an ACL referred to $message_body or $message_body_end, the value was not
6350 reset for any messages that followed in the same SMTP session.
6352 54. The store-handling optimization for building very long strings was not
6353 differentiating between the different store pools. I don't think this
6354 actually made any difference in practice, but I've tidied it.
6356 55. While running the routers to verify a sender address, $sender_address
6357 was still set to the sender address. This is wrong, because when routing to
6358 send a bounce to the sender, it would be empty. Therefore, I have changed
6359 it so that, while verifying a sender address, $sender_address is set to <>.
6360 (There is no change to what happens when verifying a recipient address.)
6362 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6363 target A or AAAA records (if not already returned) without resetting the
6364 qualify_single or search_parents options of the DNS resolver. These are
6365 inappropriate in this case because the targets of MX and SRV records must
6366 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6367 target that, when qualified, matched something in the local domain. These
6368 two options are now turned off when doing these lookups.
6370 57. It seems that at least some releases of Reiserfs (which does not have the
6371 concept of a fixed number of inodes) returns zero and not -1 for the
6372 number of available inodes. This interacted badly with check_spool_inodes,
6373 which assumed that -1 was the "no such thing" setting. What I have done is
6374 to check that the total number of inodes is greater than zero before doing
6375 the test of how many are available.
6377 58. When a "warn" ACL statement has a log_message modifier, the message is
6378 remembered, and not repeated. This is to avoid a lot of repetition when a
6379 message has many recipients that cause the same warning to be written.
6380 However, Exim was preserving the list of already written lines for an
6381 entire SMTP session, which doesn't seem right. The memory is now reset if a
6382 new message is started.
6384 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6385 debugging output unless log_rewrite was also set.
6387 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6388 of (int)(handle) when we know that handle contains (void *)(-1).
6390 61. The Exim daemon panic-logs an error return when it closes the incoming
6391 connection. However "connection reset by peer" seems to be common, and
6392 isn't really an error worthy of noting specially, so that particular error
6395 62. When Exim is trying to find all the local interfaces, it used to panic and
6396 die if the ioctl to get the interface flags failed. However, it seems that
6397 on at least one OS (Solaris 9) it is possible to have an interface that is
6398 included in the list of interfaces, but for which you get a failure error
6399 for this call. This happens when the interface is not "plumbed" into a
6400 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6401 failure of the "get flags" call assumes that the interface is down.
6403 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6404 makes life easier for people who are doing arithmetic on fields extracted
6405 from dates, where you often get leading zeros that should not be
6406 interpreted as octal.
6408 64. Added qualify_domain to the redirect router, to override the global
6411 65. If a pathologically long header line contained very many addresses (the
6412 report of this problem mentioned 10 000) and each of them was rewritten,
6413 Exim could use up a very large amount of memory. (It kept on making new
6414 copies of the header line as it rewrote, and never released the old ones.)
6415 At the expense of a bit more processing, the header rewriting function has
6416 been changed so that it no longer eats memory in this way.
6418 66. The generation of the Received: header has been moved from the time that a
6419 message starts to be received, to the time that it finishes. The timestamp
6420 in the Received: header should now be very close to that of the <= log
6421 line. There are two side-effects of this change:
6423 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6424 logged header lines no longer include the local Received: line, because
6425 it has not yet been created. The same applies to a copy of the message
6426 that is returned to a non-SMTP sender when a message is rejected.
6428 (b) When a filter file is tested using -bf, no additional Received: header
6429 is added to the test message. After some thought, I decided that this
6432 This change does not affect the value of $received_for. It is still set
6433 after address rewriting, but before local_scan() is called.
6435 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6437 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6438 gave an unhelpful panic error message, and a defer error. I have managed to
6439 change this behaviour so that it now rejects any supplied certificate,
6440 which seems right, as the list of acceptable certificates is empty.
6442 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6443 gave an unhelpful defer error. I have not managed to make this reject any
6444 supplied certificates, but the error message it gives is "no certificate
6445 supplied", which is not helpful.
6447 70. exigrep's output now also includes lines that are not associated with any
6448 message, but which match the given pattern. Implemented by a patch from
6449 Martin Sluka, which also tidied up the Perl a bit.
6451 71. Recipient callout verification, like sender verification, was using <> in
6452 the MAIL FROM command. This isn't really the right thing, since the actual
6453 sender may affect whether the remote host accepts the recipient or not. I
6454 have changed it to use the actual sender in the callout; this means that
6455 the cache record is now keyed on a recipient/sender pair, not just the
6456 recipient address. There doesn't seem to be a real danger of callout loops,
6457 since a callout by the remote host to check the sender would use <>.
6458 [SEE ABOVE: changed after hitting problems.]
6460 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6461 temporary errors. However, in the case of such a code being given after
6462 the end of a data transmission (i.e. after ".") Exim was failing to write
6463 a retry record for the message. (Yes, there was some broken host that was
6464 actually sending 8xx at this point.)
6466 73. An unknown lookup type in a host list could cause Exim to panic-die when
6467 the list was checked. (An example that provoked this was putting <; in the
6468 middle of a list instead of at the start.) If this happened during a DATA
6469 ACL check, a -D file could be left lying around. This kind of configuration
6470 error no longer causes Exim to die; instead it causes a defer error. The
6471 incident is still logged to the main and panic logs.
6473 74. Buglet left over from Exim 3 conversion. The message "too many messages
6474 in one connection" was written to the rejectlog but not the mainlog, except
6475 when address rewriting (yes!) was being logged.
6477 75. Added write_rejectlog option.
6479 76. When a system filter was run not as root (that is, when system_filter_user
6480 was set), the values of the $n variables were not being returned to the
6481 main process; thus, they were not subsequently available in the $sn
6484 77. Added +return_path_on_delivery log selector.
6486 78. A connection timeout was being treated differently from recipients deferred
6487 when testing hosts_max_try with a message that was older than the host's
6488 retry timeout. (The host should not be counted, thus allowing all hosts to
6489 be tried at least once before bouncing.) This may have been the cause of an
6490 occasionally reported bug whereby a message would remain on the queue
6491 longer than the retry timeout, but would be bounced if a delivery was
6492 forced. I say "may" because I never totally pinned down the problem;
6493 setting up timeout/retry tests is difficult. See also the next item.
6495 79. The ultimate address timeout was not being applied to errors that involved
6496 a combination of host plus message (for example, a timeout on a MAIL
6497 command). When an address resolved to a number of possible hosts, and they
6498 were not all tried for each delivery (e.g. because of hosts_max_try), a
6499 message could remain on the queue longer than the retry timeout.
6501 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6504 81. Fixed an obscure SMTP outgoing bug which required at least the following
6505 conditions: (a) there was another message waiting for the same server;
6506 (b) the server returned 5xx to all RCPT commands in the first message so
6507 that the message was not completed; (c) the server dropped the connection
6508 or gave a negative response to the RSET that Exim sends to abort the
6509 transaction. The observed case was a dropped connection after DATA that had
6510 been sent in pipelining mode. That is, the server had advertised PIPELINING
6511 but was not implementing it correctly. The effect of the bug was incorrect
6512 behaviour, such as trying another host, and this could lead to a crash.
6518 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6519 and daemon.c were passed as pointers to ints; they should have been
6520 pointers to socklen_t variables (which are typically unsigned ints).
6522 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6525 3. Fixed a really odd bug that affected only the testing scheme; patching a
6526 certain fixed string in the binary changed the value of another string that
6527 happened to be identical to the end of the original first string.
6529 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6530 name", it returns that address as the IP address. On some operating
6531 systems (e.g. Solaris), it also passes back the IP address string as the
6532 "host name". However, on others (e.g. Linux), it passes back an empty
6533 string. Exim wasn't checking for this, and was changing the host name to an
6534 empty string, assuming it had been canonicalized.
6536 5. Although rare, it is permitted to have more than one PTR record for a given
6537 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6538 all the names associated with an address, because they do in Solaris.
6539 However, it seems that they do not in Linux for data that comes from the
6540 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6541 I found this out when I moved to a new Linux workstation and tried to run
6542 the Exim test suite.
6544 To get round this problem I have changed the code so that it now does its
6545 own call to the DNS to look up PTR records when searching for a host name.
6546 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6547 addresses that are only in /etc/hosts are still found.
6549 This behaviour is, however, controlled by an option called host_lookup_
6550 order, which defaults to "bydns:byaddr". If people want to use the other
6551 order, or indeed, just use one or the other means of lookup, they can
6552 specify it in this variable.
6554 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6555 some operating systems, this comes back from gethostbyaddr() as an empty
6556 string, and this is what Exim used to test for. However, it seems that in
6557 other systems, "." is yielded. Exim now tests for this case too.
6559 7. The values of check_spool_space and check_log_space are now held internally
6560 as a number of kilobytes instead of an absolute number of bytes. If a
6561 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6562 kilobyte. This means that much larger values can be stored.
6564 8. Exim monitor: an attempt to get the action menu when not actually pointing
6565 at a message produces an empty menu entitled "No message selected". This
6566 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6567 no entries in it ("Shell widget menu has zero width and/or height"). So I
6568 have added a single, blank menu entry in this case.
6570 9. Added ${quote_local_part.
6572 10. MIME decoding is now applied to the contents of Subject: header lines when
6575 11. Now that a reference to $sender_host_address automatically causes a reverse
6576 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6577 host lookup before query-style lookups in lists that might use this
6578 variable. This has therefore been abolished, and the "net-" prefix is no
6579 longer necessary for query-style lookups.
6581 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6582 have been a typo for LFLAGS, so it has been changed.
6584 13. The install script calls Exim with "-C /dev/null" in order to find the
6585 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6586 to be output. However, since Exim outputs its version number before the
6587 error, it didn't break the script. It just looked ugly. I fixed this by
6588 always allowing "-C /dev/null" if the caller is root.
6590 14. Ignore overlarge ACL variable number when reading spool file - insurance
6591 against a later release with more variables having written the file.
6593 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6594 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6595 this, as well as the form without the "IPv6" on the front.
6597 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6598 OS/Makefile-Darwin file.
6600 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6601 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6603 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6604 variable. However, some OS use ints for inodes. I've added cast to long int
6605 to get rid of the compiler warning.
6607 19. I had forgotten to lock out "/../" in configuration file names when
6608 ALT_CONFIG_PREFIX was set.
6610 20. Routers used for verification do not need to specify transports. However,
6611 if such a router generated a host list, and callout was configured, Exim
6612 crashed, because it could not find a port number from the (non-existent)
6613 transport. It now assumes port 25 in this circumstance.
6615 21. Added the -t option to exigrep.
6617 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6618 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6619 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6620 them is set, LOOKUP_LSEARCH is forced.
6622 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6624 24. Added sender and host information to the "rejected by local_scan()" log
6625 line; previously there was no indication of these.
6627 25. Added .include_if_exists.
6629 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6630 Linux. It turns out that not all file systems support this. Apparently some
6631 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6632 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6633 not supported on the file descriptor, is now ignored when Exim is trying to
6634 sync a directory. This applies only to Linux.
6636 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6638 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6639 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6642 29. Added support for maildirsize files from supplied patch (modified a bit).
6644 30. The use of :fail: followed by an empty string could lead Exim to respond to
6645 sender verification failures with (e.g.):
6647 550 Verification failed for <xxx>
6648 550 Sender verify failed
6650 where the first response line was missing the '-' that indicates it is not
6651 the final line of the response.
6653 31. The loop for finding the name of the user that called Exim had a hardwired
6654 limit of 10; it now uses the value of finduser_retries, which is used for
6655 all other user lookups.
6657 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6660 33. Exim was neglecting to zero errno before one call of strtol() when
6661 expanding a string and expecting an integer value. On some systems this
6662 resulted in spurious "integer overflow" errors. Also, it was casting the
6663 result into an int without checking.
6665 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6666 did not work. The code looks as if it has *never* worked, though it appears
6667 to have been documented since at least release 1.62. I have made it work.
6669 35. The "timeout_DNS" error in retry rules, also documented since at least
6670 1.62, also never worked. As it isn't clear exactly what this means, and
6671 clearly it isn't a major issue, I have abolished the feature by treating it
6672 as "timeout", and writing a warning to the main and panic logs.
6674 36. The display of retry rules for -brt wasn't always showing the error code
6677 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6678 timeout_connect_A, timeout_connect_MX.
6680 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6681 to the empty sender.
6683 39. The daemon was not analysing the content of -oX till after it had closed
6684 stderr and disconnected from the controlling terminal. This meant that any
6685 syntax errors were only noted on the panic log, and the return code from
6686 the command was 0. By re-arranging the code a little, I've made the
6687 decoding happen first, so such errors now appear on stderr, and the return
6688 code is 1. However, the actual setting up of the sockets still happens in
6689 the disconnected process, so errors there are still only recorded on the
6692 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6693 connections (as happens on some IP stacks) was logged at start up time as
6694 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6695 it from "IPv6 and IPv4", which means that two separate sockets are being
6698 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6699 says whether AF_INET or AF_INET6 was passed as an argument.
6701 42. Exiwhat output was messed up when time zones were included in log
6704 43. Exiwhat now gives more information about the daemon's listening ports,
6705 and whether -tls-on-connect was used.
6707 44. The "port" option of the smtp transport is now expanded.
6709 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6710 silently ignored. Now an error message is written to the main and panic
6713 46. There's a new ACL modifier called "logwrite" which writes to a log file
6714 as soon as it is encountered.
6716 47. Added $local_user_uid and $local_user_gid at routing time.
6718 48. Exim crashed when trying to verify a sender address that was being
6721 49. Exim was recognizing only a space character after ".include". It now also
6722 recognizes a tab character.
6724 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6725 extracting the relevant information from the specification. The man page no
6726 longer contains scrambled data for the -d option, and I've added a section
6727 at the front about calling Exim under different names.
6729 51. Added "extra_headers" argument to the "mail" command in filter files.
6731 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6734 53. Installed eximstats 1.29.
6736 54. Added transport_filter_timeout as a generic transport option.
6738 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6739 Cc: header lines. This was required by RFC 822, but it not required by RFC
6742 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6743 incoming messages that did not have them. Now it does so only if the
6744 message originates locally, that is, if there is no associated remote host
6745 address. When Resent- header lines are present, this applies to the Resent-
6746 lines rather than the non-Resent- lines.
6748 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6749 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6751 58. Messages for configuration errors now include the name of the main
6752 configuration file - useful now that there may be more than one file in a
6753 list (.included file names were always shown).
6755 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6756 for those rare installations that do not start the daemon as root or run it
6757 setuid root. I've cut out the call to initgroups() if the daemon is not
6760 60. The Exim user and group can now be bound into the binary as text strings
6761 that are looked up at the start of Exim's processing.
6763 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6765 62. Added $mailstore_basename variable.
6767 63. Installed patch to sieve.c from Michael Haardt.
6769 64. When Exim failed to open the panic log after failing to open the main log,
6770 the original message it was trying to log was written to stderr and debug
6771 output, but if they were not available (the usual case in production), it
6772 was lost. Now it is written to syslog before the two lines that record the
6773 failures to open the logs.
6775 65. Users' Exim filters run in subprocesses under the user's uid. It is
6776 possible for a "deliver" command or an alias in a "personal" command to
6777 provoke an address rewrite. If logging of address rewriting is configured,
6778 this fails because the process is not running as root or exim. There may be
6779 a better way of dealing with this, but for the moment (because 4.30 needs
6780 to be released), I have disabled address rewrite logging when running a
6781 filter in a non-root, non-exim process.
6787 1. The buildconfig auxiliary program wasn't quoting the value set for
6788 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6789 not defined. This bug was masked in 4.22 by the effect that was fixed in
6792 2. Some messages that were rejected after a message id was allocated were
6793 shown as "incomplete" by exigrep. It no longer does this for messages that
6794 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6796 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6797 have allow_domain_literals set, the ID did not get logged in the <= line.
6798 Domain literals are now always recognized in Message-ID: header lines.
6800 4. The first argument for a ${extract expansion item is the key name or field
6801 number. Leading and trailing spaces in this item were not being ignored,
6802 causing some misleading effects.
6804 5. When deliver_drop_privilege was set, single queue runner processes started
6805 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6806 same command in the process it spins off) were not dropping privilege.
6808 6. When the daemon running as "exim" started a queue runner, it always
6809 re-executed Exim in the spun-off process. This is a waste of effort when
6810 deliver_drop_privilege is set. The new process now just calls the
6811 queue-runner function directly.
6817 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6820 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6821 ignored. Though the use of -oP was forcing the writing of a pid file, it
6822 was always written to the default place.
6824 3. If the message "no IP address found for host xxxx" is generated during
6825 incoming verification, it is now followed by identification of the incoming
6826 connection (so you can more easily find what provoked it).
6828 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6830 5. Added some features to "harden" Exim a bit more against certain attacks:
6832 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6833 be put in Local/Makefile. This is like the never_users runtime option,
6834 but it cannot be overridden. The default setting is "root".
6836 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6837 prefix string with which any file named in a -C command line option
6840 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6841 is retained for -C and -D only if the caller of Exim is root. Without
6842 it, the exim user may also use -C and -D and retain privilege.
6844 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6845 command line option is disabled.
6847 6. Macro names set by the -D option must start with an upper case letter, just
6848 like macro names defined in the configuration file.
6850 7. Added "dereference=" facility to LDAP.
6852 8. Two instances of the typo "uknown" in the source files are fixed.
6854 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6855 the Configure-Makefile script screwed up while processing it.
6857 10. Incorporated PCRE 4.4.
6859 11. The SMTP synchronization check was not operating right at the start of an
6860 SMTP session. For example, it could not catch a HELO sent before the client
6861 waited for the greeting. There is now a check for outstanding input at the
6862 point when the greeting is written. Because of the duplex, asynchronous
6863 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6864 way, but not yet received, when the check is performed.
6866 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6867 on TCP/IP sockets, because this apparently causes some broken clients to
6870 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6871 unchanged) from the Cygwin maintainer.
6873 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6874 was supported instead of testing for mbx. Effectively a typo.
6876 15. The spa authenticator server code was not checking that the input it
6877 received was valid base64.
6879 16. The debug output line for the "set" modifier in ACLs was not showing the
6880 name of the variable that was being set.
6882 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6884 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6885 lookup on its own. Something else was needed to trigger the lookup. For
6886 example, a match in host_lookup or the need for a host name in a host list.
6887 Now, if $sender_host_name is referenced and the host name has not yet been
6888 looked up, a lookup is performed. If the lookup fails, the variable remains
6889 empty, and $host_lookup_failed is set to "1".
6891 19. Added "eqi" as a case-independent comparison operator.
6893 20. The saslauthd authentication condition could segfault if neither service
6894 nor realm was specified.
6896 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6897 error message that was logged was misleading, and incoming SMTP
6898 connections were dropped. The message is now more accurate, and temporary
6899 errors are given to SMTP connections.
6901 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6902 (except RSET) with a 421 error, until QUIT is received. However, it was
6903 failing to send a response to QUIT.
6905 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6906 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6907 ACL is now run after the helo_try_verify_hosts code.
6909 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6910 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6911 case-independent, so other case variants are also recognized). Apparently
6912 some systems use these upper case variants.
6914 25. If more than two messages were waiting for the same host, and a transport
6915 filter was specified for the transport, Exim sent two messages over the
6916 same TCP/IP connection, and then failed with "socket operation on non-
6917 socket" when it tried to send the third.
6919 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6921 27. The extern definition of crypt16() in expand.c was not being excluded when
6922 the OS had its own crypt16() function.
6924 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6925 as a preferred synonym for return_size_limit, both as an option and as an
6928 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6930 30. Changed the default configuration ACL to relax the local part checking rule
6931 for addresses that are not in any local domains. For these addresses,
6932 slashes and pipe symbols are allowed within local parts, but the sequence
6933 /../ is explicitly forbidden.
6935 31. SPA server authentication was not clearing the challenge buffer before
6938 32. log_message in a "warn" ACL statement was writing to the reject log as
6939 well as to the main log, which contradicts the documentation and doesn't
6940 seem right (because no rejection is happening). So I have stopped it.
6942 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6943 However, I am unable to do any testing of this.
6945 34. Fixed an infelicity in the appendfile transport. When checking directories
6946 for a mailbox, to see if any needed to be created, it was accidentally
6947 using path names with one or more superfluous leading slashes; tracing
6948 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6950 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6951 contents are added to the log line that is written for every discarded
6952 recipient. (Previously a log_message setting was ignored.)
6954 36. The ${quote: operator now quotes the string if it is empty.
6956 37. The install script runs exim in order to find its version number. If for
6957 some reason other than non-existence or emptiness, which it checks, it
6958 could not run './exim', it was installing it with an empty version number,
6959 i.e. as "exim-". This error state is now caught, and the installation is
6962 38. An argument was missing from the function that creates an error message
6963 when Exim fails to connect to the socket for saslauthd authentication.
6964 This could cause Exim to crash, or give a corrupted message.
6966 39. Added isip, isip4, and isip6 to ${if conditions.
6968 40. The ACL variables $acl_xx are now saved with the message, and can be
6969 accessed later in routers, transports, and filters.
6971 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6972 strings in the file are not string-expanded.
6974 42. If a MAIL command specified a SIZE value that was too large to fit into an
6975 int variable, the check against message_size_limit failed. Such values are
6976 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6977 day this will have to be increased, but I don't think I want to be around
6978 when emails are that large.
6985 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6986 iconv() is not standard in FreeBSD.
6988 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6989 IPv6 enabled. The observed symptom was a segmentation fault on return from
6990 the function os_common_find_running_interfaces() in src/os.c.
6992 3. In the check_special_case() function in daemon.c I had used "errno" as an
6993 argument name, which causes warnings on some systems. This was basically a
6994 typo, since it was named "eno" in the comments!
6996 4. The code that waits for the clock to tick (at a resolution of some fraction
6997 of a second) so as to ensure message-id uniqueness was always waiting for
6998 at least one whole tick, when it could have waited for less. [This is
6999 almost certainly not relevant at current processor speeds, where it is
7000 unlikely to ever wait at all. But we try to future-proof.]
7002 5. The function that sleeps for a time interval that includes fractions of a
7003 second contained a race. It did not block SIGALRM between setting the
7004 timer, and suspending (a couple of lines later). If the interval was short
7005 and the sigsuspend() was delayed until after it had expired, the suspension
7006 never ended. On busy systems this could lead to processes getting stuck for
7009 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7010 process, before it forks any delivery processes. The open lookup caching
7011 mechanism meant that the open file or database connection was passed into
7012 the delivery process. The problem was that delivery processes always tidy
7013 up cached lookup data. This could cause a problem for the next delivery
7014 process started by the queue runner, because the external queue runner
7015 process does not know about the closure. So the next delivery process
7016 still has data in the lookup cache. In the case of a file lookup, there was
7017 no problem because closing a file descriptor in a subprocess doesn't affect
7018 the parent. However, if the lookup was caching a connection to a database,
7019 the connection was closed, and the second delivery process was likely to
7020 see errors such as "PGSQL: query failed: server closed the connection
7021 unexpectedly". The problem has been fixed by closing all cached lookups
7022 in a queue runner before running a delivery process.
7024 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7025 seem to have the "const" qualifier which it has on other OS. I've
7028 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7029 *of the same type* (client or server) with the same public name that an
7030 error should be diagnosed.
7032 9. When Exim looked up a host name for an IP address, but failed to find the
7033 original IP address when looking up the host name (a safety check), it
7034 output the message "<ip address> does not match any IP for NULL", which was
7035 confusing, to say the least. The bug was that the host name should have
7036 appeared instead of "NULL".
7038 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7039 user that is built into the binary, and the -C or -D options is used, root
7040 privilege is dropped before the configuration file is read. In addition,
7041 logging is switched to stderr instead of the normal log files. If the
7042 configuration then re-defines the Exim user, the unprivileged environment
7043 is probably not what is expected, so Exim logs a panic warning message (but
7046 However, if deliver_drop_privilege is set, the unprivileged state may well
7047 be exactly what is intended, so the warning has been cut out in that case,
7048 and Exim is allowed to try to write to its normal log files.
7054 1. smtp_return_error_details was not giving details for temporary sender
7055 or receiver verification errors.
7057 2. Diagnose a configuration error if two authenticators have the same public
7060 3. Exim used not to create the message log file for a message until the first
7061 delivery attempt. This could be confusing when incoming messages were held
7062 for policy or load reasons. The message log file is now created at the time
7063 the message is received, and an initial "Received" line is written to it.
7065 4. The automatically generated man page for command line options had a minor
7066 bug that caused no ill effects; however, a more serious problem was that
7067 the procedure for building the man page automatically didn't always
7068 operate. Consequently, release 4.20 contains an out-of-date version. This
7069 shouldn't happen again.
7071 5. When building Exim with embedded Perl support, the script that builds the
7072 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7073 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7075 6. The freeze_tell option was not being used for messages that were frozen on
7076 arrival, either by an ACL or by local_scan().
7078 7. Added the smtp_incomplete_transaction log selector.
7080 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7081 was accepting AUTH without a new EHLO.
7083 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7084 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7087 10. Logging of TCP/IP connections (when configured) now happens in the main
7088 daemon process instead of the child process, so that the TCP/IP connection
7089 count is more accurate (but it can never be perfect).
7091 11. The use of "drop" in a nested ACL was not being handled correctly in the
7092 outer ACL. Now, if condition failure induced by the nested "drop" causes
7093 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7094 or "require"), the connection is dropped.
7096 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7097 that yield "discard" can now be used with an "accept" or a "discard" verb,
7098 but an error is generated for any others (because I can't see a useful way
7099 to define what should happen).
7101 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7102 are now processed in the same way as lines in the Exim configuration file.
7103 In particular, continuation lines are supported.
7105 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7107 15. Added -ti meaning -t -i.
7109 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7110 domains, and warn by logging if others are found.
7112 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7113 returned from GIFCONF when Exim is trying to find the list of interfaces on
7114 a host. The code in os.c has been modified to copy each ifreq to an aligned
7115 structure in all cases.
7117 Also, in some cases, the returned ifreq's were being copied to a 'struct
7118 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7119 means the last couple of bytes of an IPv6 address could be chopped if the
7120 ifreq contained only a normal sockaddr (14 bytes storage).
7122 18. Named domain lists were not supported in the hosts_treat_as_local option.
7123 An entry such as +xxxx was not recognized, and was treated as a literal
7126 19. Ensure that header lines added by a DATA ACL are included in the reject log
7127 if the ACL subsequently rejects the message.
7129 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7130 MD5 (which is deprecated).
7132 21. When testing a filter file using -bf, Exim was writing a message when it
7133 took the sender from a "From " line in the message, but it was not doing so
7134 when it took $return_path from a Return-Path: header line. It now does.
7136 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7137 with a valid header line field name (a series of printing characters
7138 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7140 23. Changed "disc" in the source to "disk" to conform to the documentation and
7141 the book and for uniformity.
7143 24. Ignore Sendmail's -Ooption=value command line item.
7145 25. When execve() failed while trying to run a command in a pipe transport,
7146 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7147 could be confused with a return value of 69 from the command itself. This
7148 has been changed to 127, the value the shell returns if it is asked to run
7149 a non-existent command. The wording for the related log line suggests a
7150 non-existent command as the problem.
7152 26. If received_header_text expands to an empty string, do not add a Received:
7153 header line to the message. (Well, it adds a token one on the spool, but
7154 marks it "old" so that it doesn't get used or transmitted.)
7156 27. Installed eximstats 1.28 (addition of -nt option).
7158 28. There was no check for failure on the call to getsockname() in the daemon
7159 code. This can fail if there is a shortage of resources on the system, with
7160 ENOMEM, for example. A temporary error is now given on failure.
7162 29. Contrary to the C standard, it seems that in some environments, the
7163 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7164 program. Exim now does this explicitly; it affects the formatting of
7165 timestamps using strftime().
7167 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7168 complaints. I've now initialized all the variables, to avoid this.
7170 32. Header lines added by a system filter were not being "seen" during
7171 transport-time rewrites.
7173 33. The info_callback() function passed to OpenSSL is set up with type void
7174 (*)(SSL *, int, int), as described somewhere. However, when calling the
7175 function (actually a macro) that sets it up, the type void(*)() is
7176 expected. I've put in a cast to prevent warnings from picky compilers.
7178 34. If a DNS black list lookup found a CNAME record, but there were no A
7179 records associated with the domain it pointed at, Exim crashed.
7181 35. If a DNS black list lookup returned more than one A record, Exim ignored
7182 all but the first. It now scans all returned addresses if a particular IP
7183 value is being sought. In this situation, the contents of the
7184 $dnslist_value variable are a list of all the addresses, separated by a
7187 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7188 to accept a host name and all its aliases if the forward lookup for any of
7189 them yielded the IP address of the incoming connection. Now it accepts only
7190 those names whose forward lookup yields the correct IP address. Any other
7191 names are discarded. This closes a loophole whereby a rogue DNS
7192 administrator could create reverse DNS records to break through a
7193 wildcarded host restriction in an ACL.
7195 37. If a user filter or a system filter that ran in a subprocess used any of
7196 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7197 the wrong values were passed to the pipe command ($thisaddress had the
7198 value of $0, $0 had the value of $1, etc). This bug was introduced by
7199 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7201 38. Improved the line breaking for long SMTP error messages from ACLs.
7202 Previously, if there was no break point between 40 and 75 characters, Exim
7203 left the rest of the message alone. Two changes have been made: (a) I've
7204 reduced the minimum length to 35 characters; (b) if it can't find a break
7205 point between 35 and 75 characters, it looks ahead and uses the first one
7206 that it finds. This may give the occasional overlong line, but at least the
7207 remaining text gets split now.
7209 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7210 file descriptors might be low, and that setting 1000 would always raise it.
7211 It turns out that in some environments, the limit is already over 1000 and
7212 that lowering it causes trouble. So now Exim takes care not to decrease it.
7214 40. When delivering a message, the value of $return_path is set to $sender_
7215 address at the start of routing (routers may change the value). By an
7216 oversight, this default was not being set up when an address was tested by
7217 -bt or -bv, which affected the outcome if any router or filter referred to
7220 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7221 log only when "message" or "log_message" are set. However, if one of the
7222 conditions was an address verification, or a call to a nested ACL, the
7223 messages generated by the underlying test were being passed through. This
7224 no longer happens. The underlying message is available in $acl_verify_
7225 message for both "message" and "log_message" expansions, so it can be
7226 passed through if needed.
7228 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7229 new expansion $bh_ to give the encoded byte string without charset
7230 translation. Translation happens only if iconv() is available; HAVE_ICONV
7231 indicates this at build time. HEADERS_CHARSET gives the charset to
7232 translate to; headers_charset can change it in the configuration, and
7233 "headers charset" can change it in an individual filter file.
7235 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7236 that creates RFC 2047 encoded "words" labels them as that charset instead
7237 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7238 expansion operator; (ii) when Exim creates a From: line for a local
7239 message; (iii) when a header line is rewritten to include a "phrase" part.
7241 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7242 buggy, causing it to skip the first lines of messages whose message ID
7243 ended in 'D'. This would not have bitten before Exim release 4.14, because
7244 message IDs were unlikely to end in 'D' before then. The effect was to have
7245 incorrect size information for certain domains.
7247 45. #include "config.h" was missing at the start of the crypt16.c module. This
7248 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7251 46. If there was a timeout during a "random" callout check, Exim treated it as
7252 a failure of the random address, and carried on sending RSET and the real
7253 address. If the delay was just some slowness somewhere, the response to the
7254 original RCPT would be taken as a response to RSET and so on, causing
7255 mayhem of various kinds.
7257 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7258 when I implemented it. It didn't allow for the fact that some option values
7259 may legitimately be negative (e.g. size_addition), and it didn't even do
7260 the right test for positive values.
7262 48. Domain names in DNS records are case-independent. Exim always looks them up
7263 in lower case. Some resolvers return domain names in exactly the case they
7264 appear in the zone file, that is, they may contain uppercase letters. Not
7265 all resolvers do this - some return always lower case. Exim was treating a
7266 change of case by a resolver as a change of domain, similar to a widening
7267 of a domain abbreviation. This triggered its re-routing code and so it was
7268 trying to route what was effectively the same domain again. This normally
7269 caused routing to fail (because the router wouldn't handle the domain
7270 twice). Now Exim checks for this case specially, and just changes the
7271 casing of the domain that it ultimately uses when it transmits the message
7274 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7277 50. If a filter generated a file delivery with a non-absolute name (possible if
7278 no home directory exists for the router), the forbid_file option was not
7281 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7282 the existing equality matching.
7284 52. Exim was using ints instead of ino_t variables in some places where it was
7285 dealing with inode numbers.
7287 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7288 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7289 called TMPDIR, and if it finds it is different, it changes its value.
7291 54. The smtp_printf() function is now made available to local_scan() so
7292 additional output lines can be written before returning. There is also an
7293 smtp_fflush() function to enable the detection of a dropped connection.
7294 The variables smtp_input and smtp_batched_input are exported to
7297 55. Changed the default runtime configuration: the message "Unknown user"
7298 has been removed from the ACL, and instead placed on the localuser router,
7299 using the cannot_route_message feature. This means that any verification
7300 failures that generate their own messages won't get overridden. Similarly,
7301 the "Unrouteable address" message that was in the ACL for unverifiable
7302 relay addresses has also been removed.
7304 56. Added hosts_avoid_esmtp to the smtp transport.
7306 57. The exicyclog script was not checking for the esoteric option
7307 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7308 will work only if exicyclog is run under the appropriate euid.
7310 58. Following a discussion on the list, the rules by which Exim recognises line
7311 endings on incoming messages have been changed. The -dropcr and drop_cr
7312 options are now no-ops, retained only for backwards compatibility. The
7313 following line terminators are recognized: LF CRLF CR. However, special
7314 processing applies to CR:
7316 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7317 nor a local message in the state where . is a terminator.
7319 (ii) If a bare CR is encountered in a header line, an extra space is added
7320 after the line terminator so as not to end the header. The reasoning
7321 behind this is that bare CRs in header lines are most likely either
7322 to be mistakes, or people trying to play silly games.
7324 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7325 was being incorrectly given as 18 bytes larger than it should have been.
7326 This is a VOB (very old bug).
7328 60. This may never have affected anything current, but just in case it has:
7329 When the local host is found other than at the start of a list of hosts,
7330 the local host, those with the same MX, and any that follow, are discarded.
7331 When the list in question was part of a longer list of hosts, the following
7332 hosts (not currently being processed) were also being discarded. This no
7333 longer happens. I'm not sure if this situation could ever has previously
7336 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7339 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7340 header. This is something that is recommended in a new Internet Draft, and
7341 is something that is documented as being done by Sendmail. There are two
7342 possible values. For messages generated by the autoreply transport, Exim
7345 Auto-Submitted: auto-replied
7347 whereas for all other generated messages (e.g. bounces) it adds
7349 Auto-Submitted: auto-generated
7351 63. The "personal" condition in filters now includes a test for the
7352 Auto-Submitted: header. If it contains the string "auto-" the message it
7353 not considered personal.
7355 64. Added rcpt_include_affixes as a generic transport option.
7357 65. Added queue_only_override (default true).
7359 66. Added the syslog_duplication option.
7361 67. If what should have been the first header line of a message consisted of
7362 a space followed by a colon, Exim was mis-interpreting it as a header line.
7363 It isn't of course - it is syntactically invalid and should therefore be
7364 treated as the start of the message body. The misbehaviour could have
7365 caused a number of strange effects, including loss of data in subsequent
7366 header lines, and spool format errors.
7368 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7369 client host had authenticated. This control can now be exercised by an ACL
7370 for more flexibility.
7372 69. By default, callouts do not happen when testing with -bh. There is now a
7373 variant, -bhc, which does actually run the callout code, including
7374 consulting and updating the callout cache.
7376 70. Added support for saslauthd authentication, courtesy of Alexander
7379 71. If statvfs() failed on the spool or log directories while checking their
7380 size for availability, Exim confusingly gave the error "space shortage".
7381 Furthermore, in debugging mode it crashed with a floating point exception.
7382 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7383 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7384 serious problem, Exim now writes to the main and panic logs when this
7385 happens, with details of the failure. It then refuses to accept the
7386 incoming message, giving the message "spool directory problem" or "log
7387 directory problem" with a 421 code for SMTP messages.
7389 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7390 0, 1, and 2 exist, because some OS complain for execs without them (see
7391 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7392 descriptors. However, the code omitted to check that the open succeeded,
7393 causing mysterious errors if for some reason the permissions on /dev/null
7394 got screwed. Now Exim writes a message to the main and panic logs, and
7395 bombs out if it can't open /dev/null.
7397 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7398 interact so that it is all more flexible. It is supposed to remain
7399 backwards compatible. Also added extra_local_interfaces.
7401 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7402 to bomb out with an assertion failure - to the client this appears as a
7403 connection drop. This problem occurs in the part of the code that was taken
7404 from the Samba project. Fortunately, the assertion is in a very simple
7405 function, so I have fixed this by reproducing the function inline in the
7406 one place where it is called, and arranging for authentication to fail
7407 instead of killing the process with assert().
7409 75. The SPA client code was not working when the server requested OEM rather
7410 than Unicode encoding.
7412 76. Added code to make require_files with a specific uid setting more usable in
7413 the case where statting the file as root fails - usually a non-root-mounted
7414 NFS file system. When this happens and the failure is EACCES, Exim now
7415 forks a subprocess and does the per-uid checking as the relevant uid.
7417 77. Added process_log_path.
7419 78. If log_file_path was not explicitly set, a setting of check_log_space or
7420 check_log_inodes was ignored.
7422 79. If a space check for the spool or log partitions fails, the incident is now
7423 logged. Of course, in the latter case the data may get lost...
7425 80. Added the %p formatting code to string_format() so that it can be used to
7426 print addresses in debug_print(). Adjusted all the address printing in the
7427 debugging in store.c to use %p rather than %d.
7429 81. There was a concern that a line of code in smtp_in.c could overflow a
7430 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7431 initially expressed, the concern was not well-founded, because trailing
7432 spaces are removed early. However, if the trailing spaces were followed by
7433 a NULL, they did not get removed, so the overflow was possible. Two fixes
7436 (a) I re-wrote the offending code in a cleaner fashion.
7437 (b) If an incoming SMTP command contains a NULL character, it is rejected
7440 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7441 runs initgroups(), so that if the Exim user is in any additional groups,
7442 they will be used during message reception.
7448 The change log for 4.20 and earlier releases has been archived.